Hep B Blog

Tag Archives: Research

CAB Corner, Clinical Trials, HDV, Hepatitis Delta (HDV), Living with Hepatitis B

Lived experiences of clinical trials and how patient insights can improve equity in process and outcomes

 

 

 

 

Authors: Lori Scott, Amanda Goldring, Joe Balestreri, Philip Kwame Yeboah, Kenneth Kabagambe, and Prince O. Okinedo  

Patient involvement in research means they are included as active partners in all stages of the research process. In other words, patient involvement ensures that research is carried out with patients, instead of research being done to patients [1].  

 

Patient involvement is essential throughout the drug development and clinical trial process to ensure patients’ clinical needs and preferences are met [2]. When clinical trial teams do not involve patients as research partners to identify appropriate research outcomes and co-create study designs, the teams may fail to achieve meaningful outcomes. More and more researchers are realizing that the personal experiences of patients and their caregivers are not just useful, but vital to the design of clinical trials. 

 

Patient participation in clinical research is crucial for informing patient recruitment and retention efforts that can ultimately speed up the development and potential market availability of medicines and diagnostics [3]. In the end, patients are the intended recipients of the products of clinical research, and if patients are actively involved in research, they can effectively improve outcomes. 

 

The following four sections share real life stories and lived experiences of individuals trying to participate in clinical trials, and the challenges they have faced. The patients and caregivers who contributed to this blog have personal experiences with applying for, enrolling in, and being rejected from clinical trials, and know of the treatment consequences when patients are not involved in their care plans. Based on their experiences, they have suggested many ways to incorporate the patient voice into drug development and clinical trial design, from recruitment, enrollment and retention methods to informational materials for patients, to help industry and academia develop more accessible clinical trials and research efforts. 

 

Please note: Following the four accounts of personal experiences, there are seven specific suggestions for researchers.   

 

Lori’s lived experience: Challenges identifying and applying for clinical trials (2018) 

There is no clear pathway for patients when trying to find and apply for clinical trials, and much of the effort is placed on the patient to move through the process.  

 

Currently, it seems the internet search bar is the best option for patients trying to join clinical trials, and recruitment is not happening at the local level in communities and even in doctors’ offices. This process places a significant burden on the patient and needs to change.  

 

My daughter’s diagnosis of hepatitis B, hepatitis D and other rare digestive diseases did not come with a map. We had to start with the internet and do our own research. I would work all day and research all night; I was in a fight for my daughter’s life. We learned about some potential clinical trials through the Hepatitis B Foundation’s Clinical Trial page and how to apply for study participation. When my daughter applied for a clinical research program with the National Institutes of Health (NIH), I had to figure out the whole process from finding information to applying and getting screened. 

 

We were excited when she was accepted for the first phase of the trial, but as I understood later, my daughter’s study group was one of the first of this trial. The trial was not well organized, and it seemed that the research team was not cohesive. It seemed that the staff did not know if the patients had full understanding of all that would happen in the clinical environment. Participants involved in the consent process need to understand that research is distinct from clinical care. Research eventually benefits society rather than the participant. It is also necessary to understand expectations and risks involved in participation, and that someone knowledgeable is available to go over questions and concerns before the consent signature. 

 

While the travel was well coordinated, it was difficult for my daughter due to her frail physical condition. When we arrived, some of the specialists assigned to her care were on vacation or otherwise unavailable, which was heartbreaking as we were informed of my daughter’s very full itinerary before planning our trip to the center, to ensure she would receive all planned evaluations. We had planned specifically for these two days and that somehow did not happen. These physicians were vital to the study process, and the evaluations should have been postponed until those key people were available. 

 

We returned home with little communication from the program after their testing, which they told us would be normal. A year later, we received a letter from the organizers, stating that they were releasing her from the study but would keep her data in the system. 

Reflecting on this experience, I was disappointed in the way the trial was organized. If there was a patient navigator, or clear informational sources, we would not have had to guess what was happening next for the entire time we were at the research site. Because it wasn’t well explained, we had unmet expectations of the study. Despite these shortcomings, we are glad to have participated and felt we learned so much about research. 

By gaining a deeper understanding of patients’ and caregivers’ lived experiences and challenges, organizations offering clinical trials can become a true asset, providing the valuable data needed for future research. 

 

Amanda’s lived experience: Clinical trial rejection (2020) 

It was only a couple of months after my hepatitis B diagnosis that my liver nurse called to ask if I would be willing to apply for a clinical trial. The trial team was trying to find a functional cure for HBV. She said that she could not guarantee that my application would be successful, as she did not know the criteria for acceptance, but it was worth a try. 

I sent off my application form and waited to hear back.  

 

Initially, I was very excited at the thought of participating in a trial. Even if the trial came to a dead end, it could possibly be another step towards a functional cure. I watched for the post each day, hoping for an acceptance letter. As time went on, I was sure that I had a place on the trial. Surely, if I did not meet the criteria I would have heard back almost right away. To save disappointment, it would have been better for the “acceptance criteria” to be transparent, either at the start before my nurse had become involved, or at a later stage on the application form. In this case I was given no patient-facing materials. Surely this should be a standard requirement. 

 

Time passed and eventually the letter I had waited for dropped through my letter box. On opening it my heart sank–it was a rejection letter. Due to being diagnosed with Crohn’s disease (a type of irritable bowel disease that makes your digestive tract become swollen), I was not suitable for the trial. The letter tried to let me down gently, saying that maybe I would be suitable later. However, it gave me false hope and for months I hoped that a letter would arrive inviting me to participate in the trial that did accept Crohn’s patients. Eventually, I realised that this letter was never going to come. My world, which was already dark, felt darker. I felt that society was rejecting me and now the drug trials were too. Drug researchers should consider patients’ feelings when rejecting their application. They should implement quick responses and avoid using language that may give false hope for future acceptance into another clinical trial. 

 

Thankfully, I have moved on from this dark period in my life. I have accepted that I will probably never be eligible for a clinical trial, as a functional cure seems to rely on strengthening the immune system. My Crohn’s treatment relies on suppressing the immune system. It would have been kinder, in the long run, not to give false hope. An explanation as to why Inflammatory bowel disease was excluded would be far better than “maybe at a later date.” As patients, we are used to hearing stark news and although it might be painful to hear, we eventually do accept it – we have no choice. 

 

There is hope after being rejected for a trial. There will possibly be other drug trials to apply for and if not, the pot of gold at the end of the rainbow will eventually be a functional cure for this or the next generation. 

 

Researchers must consider patients’ feelings when rejecting their applications. Implementing quick responses is not just a matter of efficiency; it also shows respect for the patient’s time and effort. 

 

Joe’s lived experience: Clinical trial participation (2013 to 2019)  

When I signed-up for the National Institutes for Health’s (NIH) clinical trial to find a treatment for hepatitis delta in 2013, I didn’t know how it would affect my life overall. I was focused on getting help. 

 

The NIH was accommodating in many ways concerning my practical needs. For U.S.-based patients in my trial, airfare, lodging on campus, and most land transportation was paid for by the NIH.  

 

But there were many challenges to being in a trial far from home. Looking back, I figured each of my 70 round trips from California to Washington could cost me $100-200 in lost wages and travel expenses. There were also challenges getting to D.C. for weekly appointments, which required 16 to 20 hours of travel round trip. These visits were crammed with many weeks’ worth of tests, scans and doctor appointments. Sometimes, poor communication from the NIH led to confusion about my travel arrangements. Other times, my symptoms were so bad that I couldn’t bear a long plane ride plus getting to and from the airport. 

 

Communication with the NIH was good but sometimes lacking, especially as it was difficult getting my hepatitis delta test results. Oftentimes, I did not receive clear and adequate explanations of my results.  

 

If I were involved in redesigning my study, I would have urged the researchers to have a better understanding of what patients and their loved ones go through just getting to the NIH, including the financial, physical and social costs, as well as time commitment. When clinical trials are informed by patients, other patients in the community are more likely to volunteer for trials AND are more likely to stay committed to participating, as the challenges mentioned above (personal hardships, communication issues) have been accounted for during the clinical trial design. 

 

Philip’s: How patient involvement in research can enhance hepatitis care in Africa 

Patients in Ghana are not involved in clinical research, despite existing research infrastructure. There are many clinical research institutions, including the Ghana I Noguchi Memorial Institute for Medical Research and Kumasi Centre for Collaborative Research. These are the same research institutions that train the doctors who handle hepatitis B.  

 

Linking it to my late brother’s story, I remember when Komfo Anokye Teaching Hospital in Kumasi, Ashanti region, Ghana, booked my brother who was living with hepatitis B on Aug. 17, 2017, to come for treatment on Sept. 4, 2017. Because there are a limited number of doctors who were available to treat people living with hepatitis B, my brother had to wait for weeks for a doctor’s appointment. During this waiting period, I updated the hospital on my brother’s deteriorating condition many times, but they insisted that he must wait until the booked date. At exactly 8:15 a.m. on Tuesday morning, 5th September 2017, heartbreakingly, I saw my brother Emmanuel, also known as Action man, giving his last breath. Because there was no patient involvement in care plans in Ghana, there was nothing to help my brother’s condition, as he was diagnosed too late, and there were no clinical trial opportunities to explore (to our knowledge), despite the apparent need. If those living with hepatitis B had more say in their care plan, they would be able to communicate directly with researchers about their conditions and be guided accordingly, and appropriately for their individual cases. 

 

After my brother’s demise, our immediate family members went to get tested for hepatitis B. We all tested negative for hepatitis B infection, and we took the vaccine. Based on these experiences, I have taken it upon myself to educate the public about the deadly but preventable hepatitis B infection on social media platforms and radio stations. Currently, I am the Ashanti Regional Representative for Hepatitis Foundation of Ghana and a member of the Hepatitis B Foundation’s Global Hepatitis B and D Community Advisory Board.  

 

People with lived experience have insights that can help inform researchers and clinical trial developers in their research efforts and encourage them to seriously consider patient inputs during all steps in the drug development process, from clinical trials to developing patient care plans.  

 

Kenneth: How patient involvement in research could have future impact on care/treatment practices 

Patient involvement in research can significantly enhance African healthcare practices by promoting more effective, relevant, and culturally sensitive interventions. This method reflects African communities’ cultural, social, and economic realities, ensuring that findings and recommendations are viable for local implementation. Patients can contribute insights into critical health challenges, such as infectious diseases, maternal health, or non-communicable diseases like diabetes and hypertension. 

 

Involving patients in research increases their understanding of their diseases, treatment options, and the importance of adherence to medical guidance, leading to better health outcomes [4]. They can also function as advocates and educators, increasing awareness and debunking misconceptions about diseases and treatments. 

 

Research that includes patient involvement can establish treatment protocols and care practices better adapted to the local environment, promoting comfort, dignity, and patient choices [5]. Patients engaged in inclusive research are more likely to trust and engage with the healthcare system, leading to higher participation in health initiatives, better treatment adherence, and greater uptake of preventative measures [6]. 

 

Research that is co-led with patients can have a dramatic influence on policymakers. By providing data founded on the real-world experiences of persons afflicted by diseases, patient-centered research can drive the development of policies that prioritize patient needs and assist in implementing more successful health services. 

 

In conclusion, the revolutionary potential of patient involvement in research cannot be more strongly emphasized! By ensuring that healthcare practices are more relevant, culturally sensitive, and aligned with the population’s needs, this approach has the power to significantly improve the quality of care, foster greater trust in the healthcare system, and ultimately lead to better health outcomes and more resilient healthcare systems across Africa. 

 

Suggestions 

Research using patient involvement led to more meaningful socio-economic and cultural outcomes, as patients identified issues of which researchers were not previously aware [7]. When patients are involved throughout the drug development/clinical trial design process, they can inform researchers of best practices to disseminate results among the participants and greater patient community, as they can suggest appropriate communication methods to ensure comprehension [8, 9]. Similarly, patients can co-present results at conferences [10], which can increase the greater patient community’s trust in research, and potentially increase their willingness to participate in future clinical trials, or other research endeavors. 

 

Take home suggestions for researchers:  

1) Recognize the hardships and costs of long-distance travel for patients. Find ways to alleviate this by, for example, allowing patients to get tests and scans closer to home. 

2) Find ways to help patients with the incidental costs of the trial, not otherwise covered. For example, connect patients with educational resources about financial assistance programs and fundraising methods.  

3) Improve timely communication between trial staff and patients. 

4) Properly educate and inform potential study participants on the study’s required activities.  

5) Allow study participants to have access to their personal trial data and study statistics. 

6) Recognize patients as citizen scientists, as their participation is critical to research advancement, as they provide careful and specific observations. Researchers must keep in mind that patients are not just test subjects. 

7) As important as it is to get the patient to understand clinical trial requirements, researchers should also make the effort to educate the close family members of consenting patients. Offering moral support, especially in communal settings like Africa, is critical to enhance acceptance of clinical trials and research endeavors. 

 

Resources 

  1. National Institute for Health and Care Research. (n.d.). I want to help with research. [Accessed from:  https://www.nihr.ac.uk/patients-carers-and-the-public/i-want-to-help-with-research/] 
  2. Arumugam, A., Phillips, L.R., Moore, A., Kumaran, S.D., Sampath, K.K., Migliorini, F., Maffulli, N., Ranganadhababu, B.N., Hegazy, F. & Botto-van Bemden, A. (2023). Patient and public involvement in research: A review of practical resources for young investigators. BMC Rheumatology, 7(2). doi: 10.1186/s41927-023-00327-w 
  3. Anderson, A., Borfitz, D., & Getz, K. (2018). Global public attitudes about clinical research and patient experiences with clinical trials. JAMA Network Open, 1(6), e182969-e182969. doi: 10.1001/jamanetworkopen.2018.2969 
  4. Shea, L., Pesa, J., Geonnotti, G., Powell, V., Kahn, C., & Peters, W. (2022). Improving diversity in study participation: Patient perspectives on barriers, racial differences and the role of communities. Health Expectations. 25(4):1979-87. doi: 10.1111/hex.13554 
  5. Wind, A., van der Linden, C., Hartman, E., Siesling, S., & van Harten, W. (2022). Patient involvement in clinical pathway development, implementation and evaluation–A scoping review of international literature. Patient education and counseling. 105(6):1441-8. DOI: 10.1016/j.pec.2021.10.007 
  6. Mulqueeny, D.M. & Taylor, M. (2022). Patient-centred care: Reality or rhetoric—patients’ experiences at ARV clinics located in public hospitals in KwaZulu-Natal, South Africa. AIDS research and therapy. 9(1):41. DOI: 10.1186/s12981-022-00463-2 
  7. Shen, S., Doyle-Thomas, K. A. R., Beesley, L., Karmali, A., Williams, L., Tanel, N., & McPherson, A. C. (2017). How and why should we engage parents as co-researchers in health research? A scoping review of current practices. Health Expectations: An international Journal of Public Participation in Health Care and Health Policy, 20(4), 543–554. https://doi.org/10.1111/hex.12490  
  8. Beier, K., Schweda, M. & Schicktanz, S. (2019). Taking patient involvement seriously: A critical ethical analysis of participatory approaches in data-intensive medical research. BMC Medical Informatics and Decision Making, 19(90). doi: 10.1186/s12911-019-0799-7 
  9. Maccarthy, J., Guerin, S., Wilson, A.G. & Dorris, E.R. (2019). Facilitating public and patient involvement in basic and preclinical health research. PLoS One, 14(5): e0216600. doi: 10.1371/journal.pone.0216600 
  10. Jackson, T., Pinnock, H., Liew, S.M., Horne, E., Ehrlich, E., Fulton, O., Worth, A., Sheikh, A. & De Simoni, A. (2020). Patient and public involvement in research: From tokenistic box ticking to valued team members. BMC Medicine, 18(79). doi: 10.1186/s12916-020-01544-7 

Clinical Trials, HDV, Hepatitis D Drug Development, Hepatitis Delta (HDV), Liver, Liver Health, Research

Drug Profile: Three Hepatitis Delta Therapies That We Hope to See Widely Available Soon

 

 

 

 

The full extent of hepatitis delta’s (HDV) global disease burden is still unknown and treatment options for HDV have been limited. However, there are three promising up-and-coming drugs to treat HDV patients. This blog post details the drugs’ current phase of development and testing, how well they work for patients in the real world, and their current path toward regulation and market availability. 

Bulevirtide (Hepcludex) 

Gilead Sciences Inc. has been seeking approval from the U.S. Food and Drug Administration (FDA) for bulevirtide, or Hepcludex, since 2021. In 2020, Gilead acquired MYR, a German pharmaceutical company that had developed the hepatitis delta virus (HDV) drug. At the time that it was acquired, Hepcludex had already been conditionally authorized for use in Germany, France, and Austria (MYR Pharmaceuticals, 2020). Gilead, which is based in California, in the U.S., hoped to accelerate the global launch of Hepcludex. Since then, however, Hepcludex remains in regulatory limbo. In October 2022, the FDA announced the rejection of Hepcludex, citing concerns around the manufacturing and delivery of the drug. Gilead responded by stating that they plan to resubmit Hepcludex for approval as soon as possible (Dunleavy, 2022). Six months after the FDA rejection, the Committee for Medicinal Products for Human Use, which is the European Medicines Agency’s (EMA’s) committee responsible for conveying its opinions on medicinal products to the public, stated that it recommends Hepcludex for full marketing authorization in Europe. Since its conditional approval, a Phase 3 trial (which utilized data from patients in Germany, Italy, Russia, Sweden, and the U.S.) has shown it to be safe and effective for HDV patients. If the European Commission fully approves Hepcludex, it will be the only authorized HDV treatment available in Europe (Dunleavey, 2023).  

Lonafarnib 

At the end of 2022, Eiger Biopharmaceuticals announced that lonafarnib reached an important milestone in its phase 3 trial.  

The trial includes two regimens in patients with chronic HDV:  

  1. 1. Lonafarnib boosted with ritonavir, a protease inhibitor, which interferes with the ability of certain enzymes to break down proteins, often used in combination with other therapies for antiviral activity (this is an all-oral therapy), and
  2. 2. Lonafarnib in combination peginterferon alfa, an antiviral and immunosuppressive, which either completely or partially suppresses the immune system, often used to treat hepatitis B (HBV) and hepatitis C (HCV) patients (this is a combination therapy).

Both treatment arms showed statistical significance over the placebo arm of the trial. The placebo arm is used as a control in drug testing and has no therapeutic effect on patients. The results showed three noteworthy findings: 1. After 48 weeks (about 11 months) of treatment with the all-oral regimen, a small number of patients may achieve reduced viral load and improved liver function. 2. Combining lonafarnib and ritonavir with peginterferon alfa showed the potential to almost double the effectiveness of the drugs. 3. Combination treatment may lead to significant liver tissue improvement. Researchers found that most adverse symptoms related to treatment were either mild or moderate in severity, with gastrointestinal issues being the most frequent (Eiger Biopharmaceuticals, 2022). 

Peginterferon Lambda 

In June 2023, the results of a phase 2 trial looking at the safety and efficacy of peginterferon lambda (also an Eiger Biopharmaceuticals product) in HDV patients were published. Previously, peginterferon lambda showed a good tolerability profile (or the degree to which patients can tolerate negative treatment symptoms) in patients with HBV and HCV when compared to peginterferon alfa. In this trial, patients received 120-mcg or 180-mcg peginterferon lambda injections over 48 weeks, followed by 24 weeks of post-treatment follow-up. Researchers found that 180-mcg injections were more effective in HDV patients compared to the 120-mcg injections group. Results showed that with 48 weeks of 180 mcg treatment, patients showed a significant reduction in HDV RNA, the molecules responsible for perpetuating the virus in HDV patients. 36% of patients’ HDV RNA levels were undetectable. Some of the adverse symptoms patients experienced were flu-like symptoms and elevated transaminase levels, or enzymes that are related to a fatty liver. Most adverse symptoms were mild or moderate in nature and were resolved without additional treatment (Etzion et al, 2023). 

These three drug therapies show promise for HDV patients. Hepcludex is well on its way to becoming fully authorized in Europe after its three-year conditional approval and recent Phase 3 trial results. Lonafarnib’s phase 3 trial results are encouraging and Eiger, its manufacturer, plans to begin meeting with regulatory agencies, such as FDA and EMA, to discuss regulatory submissions (Eiger Biopharmaceuticals, 2022). Peginterferon lambda has shown a higher tolerability in patients with a lower adverse event rate than peginterferon alfa, which has been modestly used for the treatment of HDV over the past several decades (Etzion et al, 2023). Peginterferon lambda still has a ways to go before regulatory discussions, considering that results have just been published from its Phase 2 trial. Typically, in Phase 2 trials, researchers seek to learn whether the treatment they are studying is effective in fighting the disease. Phase 3 will test whether peginterferon lambda is more effective than already available, standard treatments. Hopefully, these three drugs continue to show positive results for HDV patients and will become widely available over the next few years. There are a number of other HDV drugs currently in development, but these are still in the early stages of clinical trial testing. You can stay up to date on the latest developments of these drugs by checking out the Hepatitis Delta Connect Drug Watch page. 

Dunleavy, K. (2022, October 28). Gilead hits surprise FDA rejection for hepatitis D drug already authorized in Europe for 2 Years. Fierce Pharma. https://www.fiercepharma.com/pharma/gilead-gets-fda-rejection-hepatitis-d-drug-already-authorized-europe-two-years 

Dunleavy, K. (2023, May 5). After FDA rejection, Gilead’s Hepcludex looks set for full EU NOD. Fierce Pharma. https://www.fiercepharma.com/pharma/gileads-hdv-drug-hepcludex-gets-thumbs-chmp 

Eiger announces both lonafarnib-based treatments in pivotal phase 3 D-LIVR trial in Hepatitis Delta virus (HDV) achieved statistical significance against Placebo in composite primary endpoint. Eiger BioPharmaceuticals. (n.d.). https://ir.eigerbio.com/news-releases/news-release-details/eiger-announces-both-lonafarnib-based-treatments-pivotal-phase-3 

Etzion, O., Hamid, S., Lurie, Y., Gane, E. J., Yardeni, D., Duehren, S., Bader, N., Nevo-Shor, A., Channa, S. M., Cotler, S. J., Mawani, M., Parkash, O., Dahari, H., Choong, I., & Glenn, J. S. (2023). Treatment of chronic hepatitis D with peginterferon lambda-the phase 2 LIMT-1 clinical trial. Hepatology (Baltimore, Md.), 77(6), 2093–2103. https://doi.org/10.1097/HEP.0000000000000309  

MYR Pharmaceuticals. (2020, September 17). Myr Pharmaceuticals launches HEPCLUDEX® in Germany, France and Austria. PR Newswire: press release distribution, targeting, monitoring and marketing. https://www.prnewswire.com/news-releases/myr-pharmaceuticals-launches-hepcludex-in-germany-france-and-austria-301133006.html 

HDV, Hepatitis D Drug Development, Hepatitis Delta (HDV), Research

What You Need to Know About the 2022 Liver Meeting and How It Relates to Hepatitis Delta

 

 

 

 

This year, the annual Liver Meeting, hosted by the American Association for the Study of Liver Diseases (AASLD), was held in Washington, D.C. The featured presentations included new innovations in liver transplant surgery, disease modeling (which is a process that uses cells to show how a disease develops and to test possible treatment approaches), and drug development. While an effective, functional cure for hepatitis B virus (HBV) is still 5-10 years away, researchers, scientists, healthcare providers, and people with lived experience all came together and agreed that more needs to be done to reduce the burden of liver diseases and improve health outcomes now. One highlight of the meeting was Dr. Francis Collins, former director of the U.S. National Institutes of Health and special advisor to President Biden, hosting a special session to introduce a national hepatitis C elimination plan for the U.S. Unfortunately, this plan is focused on hepatitis C. As a response, the Hepatitis B Foundation will soon send an advocacy letter pushing for the inclusion of hepatitis B and hepatitis delta in this plan. Make sure you are signed up for our Action Center alerts to stay engaged with hepatitis B advocacy efforts.

Of particular note at this year’s meeting were the presence of many patient advocates and people with lived experience, and an increased focus on hepatitis delta. One important hepatitis delta poster presentation was delivered by Dr. Tatyana Kushner of Mount Sinai Hospital in New York City, entitled “HDV Patient Perspective: The Impact of Disease and Current Unmet Needs.” By including the perspectives of people living with hepatitis delta virus (HDV), this study aimed to empower the patient community. Dr. Kushner and her colleagues collected data on people’s quality of life to identify unmet needs, barriers and gaps in HDV care (including disease management and access-to-care inequities).

The researchers found that a person’s care is affected in two ways: In the care they receive for their clinical diagnosis and their emotional journey after diagnosis. The participants’ experience of care was often negatively impacted by having a delayed HDV diagnosis, and limited access to specialized care and tolerable treatment options. Findings describe that the lack of specific and acceptable treatment options for hepatitis delta left people with little hope, which put an emotional burden on their life post-diagnosis. Due to the gaps in providers’ knowledge of HDV, participants held little trust in their healthcare providers. The study participants also shared that they suffered emotionally due to the stigma attached to their diagnosis.

Dr. Kushner and her colleagues call for an increased effort to educate healthcare providers on hepatitis delta, as their lack of HDV-specific knowledge drives health disparities or differences between groups, where one group is more burdened by a disease than the other. These are driven by unequal opportunities to achieve good health (CDC, 2020). Health disparities are preventable, and educating providers is the first step to overcoming these inequalities. Educating providers on HDV will lead to more rapid identification of the disease, as they will have a better understanding of the signs, symptoms and risk factors for hepatitis delta. Increasing advocacy efforts for point-of-care testing for both HBV and HDV in the U.S. will increase levels of testing and earlier identification of people at risk for the diseases. Timely diagnosis allows for people to be linked to specialty care earlier, ultimately improving health outcomes. Improving community awareness of HDV will combat stigma and likely reduce testing hesitancy, which can improve health outcomes. The researchers call for drug developers to meet the needs of the patient community by developing tolerable and hepatitis delta-specific treatments.

In terms of drug development, researchers presented on antiviral treatments for people living with HDV and discussed preferred outcomes of treatment, based on what they believed to be most helpful to each individual’s physical health. To understand these treatment considerations, it is important to review how HDV functions. Hepatitis delta virus (HDV) uses a person’s RNA (ribonucleic acid) to produce and replicate the virus, so high HDV RNA levels in the blood indicate severe infection, and low or undetectable HDV RNA levels indicate that the virus is not rapidly reproducing (Stephenson-Tsoris & Casey, 2022). A virological response is defined as a long-term period of low-level replication that leads to undetectable HDV RNA levels in the blood six months after stopping treatment, and this indicates viral suppression (Yamashiro et al., 2004). A biochemical response is defined as normalization of alanine aminotransferase (ALT) levels after antiviral treatment (Kim et al., 2022). When liver cells are damaged, they release ALT into the bloodstream, so high levels of ALT indicate that one’s liver is diseased or damaged (MedlinePlus, n.d.). ALT normalization is considered a good indicator that antiviral therapy is working because it means that there is less liver damage, liver disease is less severe, and people living with HBV/HDV are at less risk of harm (Kim et al., 2022).

One study of interest from the meeting was the D-LIVR study by Eiger BioPharmaceuticals, Inc.: Lonafarnib Global Study in Chronic Hepatitis Delta. This study consisted of 400 participants, who were all on treatment for 48 weeks, then followed up with researchers 24 weeks after treatment. In total, 50 participants received pegylated interferon (Peg IFN) treatment for 48 weeks; 125 participants received a combination of Lonafarnib, Ritonavir and Peg IFN; and 175 participants received the oral antiviral therapy Lonafarnib and Ritonavir. There were also 50 people on a placebo treatment. A placebo is a harmless pill that has no effect on a person, and is often used in clinical trials to test the effectiveness of a specific treatment being studied, in this case, Peg IFN, Lonafarnib and Ritonavir (Harvard Health Publishing, 2021). The researchers decided that they wanted to see a decline in HDV RNA (virologic response) and normalization of ALT (biochemical response) at week 48 as their study’s main outcome or proof that the treatment could work. In this study, an acceptable virologic response was defined as a “2log decline of HDV RNA levels,” which means they wanted to see HDV RNA levels decrease by 99% from the original levels that were measured before starting treatment (Wikipedia, n.d.).

Pegylated interferon (Peg IFN) is a protein-based medication that prompts the body to activate its natural immune system (induce innate antiviral response) (Zhang & Urban, 2021; Drugbank, n.d.). For Peg IFN-based treatments, researchers determine that undetectable HDV RNA six months after stopping treatment is desirable. However, researchers emphasize the importance of yearly HDV RNA post-treatment screening to monitor for viral relapses after treatment. For long-term treatment (over 48 weeks), a 99% reduction of HDV RNA concentration levels is an appropriate virologic response for non-interferon-based treatments, but more studies must be done to establish whether a person living with hepatitis delta is actually benefiting from the treatment (this is called clinical benefit). When establishing the clinical benefits for non-interferon-based treatments (or any new treatment), researchers can measure delays in disease progression or improvement of signs and symptoms of the disease, which includes symptom relief, improved functioning and improved survival rates (Lee, n.d).

Based on a variety of extensive studies (not just D-LIVR), the researchers decided to combine virologic and biochemical responses to try to demonstrate the clinical benefit of using ongoing antiviral treatment as a functional cure for hepatitis delta. They concluded that acceptable endpoints for HDV treatment studies include undetectable HDV RNA six months after stopping treatment, the loss of the hepatitis B surface antigen (HBsAg), and ALT normalization in people living with chronic hepatitis delta. This can also be considered a functional cure since there are undetectable levels of HBsAg and HDV RNA in the blood for a sustained period of time, even after finishing treatment (Wong et al., 2022).

While there is still time before we overcome the burden of hepatitis delta, the presentations from The Liver Meeting show us that researchers and scientists are constantly working to improve the lives of people living with hepatitis delta. Development toward a functional cure is progressing, and advocates are incorporating peoples’ lived experiences and perspectives into drug development and education. Collaboration between all these groups is the best way to move forward in the fight against hepatitis delta.

For more information on hepatitis delta, you can visit the Hepatitis Delta Connect website or review this hepatitis delta fact sheet.

References

Centers for Disease Control and Prevention. (2020). Health disparities. Centers for Disease Control and Prevention, Division of Adolescent and School Health, National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention. https://www.cdc.gov/healthyyouth/disparities/index.htm 

Drugbank. (n.d.). Peginterferon alfa-2a. Drugbank. https://go.drugbank.com/drugs/DB00008

Harvard Health Publishing. (2021, December 13). The power of the placebo effect. Harvard Health Publishing, Harvard Medical School. https://www.health.harvard.edu/mental-health/the-power-of-the-placebo-effect 

Kau, A., Vermehren, J., & Sarrazin, C. (2008). Treatment predictors of a sustained virologic response in hepatitis B and C. Journal of Hepatology, 49(4), 634-651. https://doi.org/10.1016/j.jhep.2008.07.013

Kim, S. H., Cho, E. J., Jang, B. O., Lee, K., Choi, J. K., Choi, G. H., Lee, J. H., Yu, S. J., Kim, Y. J., Lee, Y. B., Yoon, J. H., Kim, J. W., Jeong, S. H., & Jang, E. S. (2022). Comparison of biochemical response during antiviral treatment in patients with chronic hepatitis B infection. Liver International: Official Journal of the International Association for the Study of the Liver, 42(2), 320–329. https://doi.org/10.1111/liv.15086 

Lee, J. (n.d.). Defining Clinical Benefit in Clinical Trials: FDA Perspective [Presentation]. U.S. Food and Drug Administration, Center for Drug Evaluation and Research. https://celiac.org/main/wp-content/uploads/2015/04/great3-07.pdf 

MedlinePlus. (n.d.). ALT blood test. National Library of Medicine (U.S.). [updated August 3, 2022]. https://medlineplus.gov/lab-tests/alt-blood-test/ 

Raman, S. (2022 October 25). Administration eyes national hepatitis C treatment plan. Roll Call: Policy. https://rollcall.com/2022/10/25/administration-eyes-national-hepatitis-c-treatment-plan/ 

Stephenson-Tsoris, S., & Casey, J. L. (2022). Hepatitis delta virus genome RNA synthesis initiates at position 1646 with a nontemplated guanosine. Journal of Virology, 96(4), e0201721. https://doi.org/10.1128/JVI.02017-21 

Wikipedia. (n.d). Log reduction. https://en.wikipedia.org/wiki/Log_reduction

Wong, G. L. H., Gane, E., & Lok, A. S. F. (2022). How to achieve functional cure of HBV: Stopping NUCs, adding interferon or new drug development?. Journal of Hepatology, 76(6), 1249–1262. https://doi.org/10.1016/j.jhep.2021.11.024

Yamashiro, T., Nagayama, K., Enomoto, N., Watanabe, H., Miyagi, T., Nakasone, H., Sakugawa, H., & Watanabe, M. (2004). Quantitation of the level of hepatitis Delta virus RNA in serum, by real-time polymerase chain reaction—and its possible correlation with the clinical stage of liver disease. The Journal of Infectious Diseases, 189(7), 1151–1157. https://doi.org/10.1086/382133

Zhang, Z., & Urban, S. (2021). New insights into HDV persistence: The role of interferon response and implications for upcoming novel therapies. Journal of Hepatology, 74(3), P686-699. https://doi.org/10.1016/j.jhep.2020.11.032

Hepatitis B Research, Research, United States

If You Have Hepatitis B, Donating Your Blood May Change the Face of Hepatitis B Testing.

The Hepatitis B Foundation has partnered with Plasma Services Group to educate people living with Hepatitis B about the critical need for blood donation. This is not like the local blood drives you always hear about. Instead, Plasma Services Group focuses on specialty plasma collection which supports the making of diagnostic tests used in labs around the world. The demand for HBV testing grows every year, but access to those tests is not assured. As you know, only 25% of people in the U.S. and 10% of people worldwide with Hepatitis B have been diagnosed. With your help, we can reduce those real-life barriers to Hepatitis B testing and improve lives. Follow the link.

How do I donate?

Donating your blood to Plasma Services Group is easy. After you complete this form, they will reach out to you if you are a good candidate for blood donation. If chosen, they will send a phlebotomist to your home to complete the blood-draw.  PSG compensates participants financially as a thank you for the trust, time and efforts associated with donation. This program is only available to U.S. residents who are preferably in the Northeast. You must be 18 years of age or older and weight 110 pounds or more. You must be living with chronic Hepatitis B, which means you have had Hepatitis B for over 6 months.

Why this is important to the future of Hepatitis B?

As you may know, access to good healthcare isn’t always easy. By creating new blood tests, we can help diagnose Hepatitis B more reliably which helps more people get into care and manage their hepatitis B. Your blood donation could directly impact the detection, care and quality of life for millions of people living with hepatitis B who have not been diagnosed yet, as well as those who are managing their care on a daily basis.

Despite the large population of people living with hepatitis B, it is hard for companies that source biological raw materials to recruit donors. Most people are unaware of the large amount of blood plasmas that are essential to manufacture test kits. Rarer subtypes that are prevalent in Africa and Asia, where the need for detection is the highest and growing the fastest, are even harder to find in N. America. By becoming a regular donor to Plasma Services Group, you are filling a vital role for the medical diagnostic industry and helping to close the gap between patient and care.

Get started today!

Fill out this form and Plasma Services Group will fill you in on next steps.

HDV, Hepatitis Delta (HDV), News, Research

Eiger Presents Clinical Trial Results at The Liver Meeting Digital Experience™ 2020

By Beatrice Zovich

The 2020 meeting of the American Association for the Study of Liver Diseases (AASLD) in November offered the opportunity for scientists from industry and academia to present their findings from clinical trials, studying new medications for hepatitis B and D. Two such presentations were given by Eiger BioPharmaceuticals, Inc. who presented their findings about how well their medications peginterferon lambda and lonafarnib work, both independently and in combination, to treat hepatitis delta virus (HDV) and halt liver fibrosis. The results are promising and offer hope for those affected by HDV.

The two medicines under investigation in these studies work in different ways. Lonafarnib works by blocking farnesyl transferase, an enzyme involved in prenylation, the modification of proteins that is necessary for the life cycle of HDV. Peginterferon lambda, on the other hand, triggers immune responses that are crucial for host protection during viral infections. Lambda can also target liver cells accurately, thus reducing the effects of inadvertently targeting central nervous system cells and making it more tolerable to those taking it (Eiger, 2020).

Eiger’s first study examined how well peginterferon lambda and lonafarnib (known as LIFT – Lambda InterFeron combo Therapy) work together to lower levels of HDV RNA, 24 weeks post-treatment (Eiger, 2020). This was a Phase 2 study. Lambda was administered at a dosage of 180 mcg once weekly, in combination with 50 mg of Lonafarnib and 100 mg of ritonavir given twice daily, for 24 weeks. The results of this study found that 77% of the 26 participants saw their HDV RNA levels decline and reach a level that was either undetectable or below the level of quantification. 23% of these participants were able to maintain these levels for 24 weeks after treatment had ended. Both tenofovir and entecavir were started prior to treatment for management of HBV. The observed side effects of this regimen were mild to moderate and included mostly gastrointestinal issues or were related to blood chemistry (Eiger, 2020).

The second study found that peginterferon lambda caused the regression of liver fibrosis after 48 weeks of treatment in people living with hepatitis delta. Two case studies emerged from the completed Phase 2 LIMT (Lambda Interferon MonoTherapy) study (Eiger, 2020). In these studies, a total of 33 participants received either 180 µg or 120 µg of lambda subcutaneous injections weekly for 48 weeks. Results indicated that degrees of liver fibrosis and levels of HDV RNA declined below the level of quantification in some participants, even after 72 weeks in a handful of cases. In some instances, ALT levels decreased as well. Side effects were found to be mild to moderate and fewer than those experienced by participants who had taken peginterferon alpha in the past. Side effects were primarily flu-like in nature (Eiger, 2020). 

Therapies for hepatitis B and D will only continue to improve and become more precise and targeted as time goes by. Check out the Hepatitis Delta Connect website for detailed information on HDV, as well as current clinical trials and a drug watch page, both of which are updated regularly. (A brand-new clinical trial has just been added!) For more information about Eiger BioPharmaceuticals, click here. 

References

Eiger BioPharmaceuticals, Inc. (2020, November 17). Eiger Announces Positive Peginterferon Lambda – Lonafarnib Combination End of Study Results from Phase 2 LIFT HDV Study in Late-Breaker Session at The Liver Meeting Digital Experience™ 2020. Retrieved December 30, 2020, from https://www.biospace.com/article/releases/eiger-announces-positive-peginterferon-lambda-lonafarnib-combination-end-of-study-results-from-phase-2-lift-hdv-study-in-late-breaker-session-at-the-liver-meeting-digital-experience-2020/

Eiger BioPharmaceuticals, I. (2020, November 16). Eiger Announces Case Studies Demonstrating Regression of Liver Fibrosis Following 48 Weeks of Therapy with Peginterferon Lambda in Patients with Chronic Hepatitis Delta Virus (HDV) Infection Presented at The Liver Meeting Digital Experience™ 2020. Retrieved December 30, 2020, from https://www.prnewswire.com/news-releases/eiger-announces-case-studies-demonstrating-regression-of-liver-fibrosis-following-48-weeks-of-therapy-with-peginterferon-lambda-in-patients-with-chronic-hepatitis-delta-virus-hdv-infection-presented-at-the-liver-meeting-digital–301173992.html 

advocacy, HBV, Hepatitis B Advocacy, Hepatitis B Awareness, Hepatitis B Prevention, Hepatitis B Research, Research, United States

Eighth Annual Hep B United Summit a Success!

Hep B United is very pleased to report that the eighth annual (and first virtual) Hep B United Summit was a great success! With over 200 attendees from around the US, the summit brought together partners – both new and familiar – to discuss and collaborate on the successes and challenges of the past year, and strategies to move forward toward the elimination of hepatitis B.  

The theme of this year’s summit was “Standing Up for Hepatitis B: Creative Collaborations to Amplify Awareness, Access, and Equity.” The event included many exciting sessions on topics such as progress toward a hepatitis B cure; strategies for providing hepatitis B services in the time of COVID-19; federal updates on hepatitis B; methods for incorporating hepatitis B into viral hepatitis elimination planning efforts at state and local levels; the path to universal adult hepatitis B vaccination; expansion of hepatitis B outreach in non-traditional settings, such as pharmacies, harm reduction centers, and correctional facilities; the pandemic of structural racism and how to bridge gaps in healthcare; and elevating the patient voice to move elimination efforts forward. The event included a poster session with over 20 submissions from presenters around the country, ranging from medical students to organizational partners, and covering a diverse and comprehensive array of topics related to hepatitis B. 

The virtual platform offered a dynamic and engaging experience, with opportunities for networking, game participation, social media involvement, and learning. The Summit concluded with an award ceremony in which nine Hepatitis B Champions and a Federal Champion were honored for their efforts and dedication to hepatitis B advocacy, awareness, prevention, and elimination efforts over the past year. 

 As in previous years, the Summit provided an opportunity for colleagues to gather and to exchange innovative and creative ideas that will help to advance hepatitis B elimination and elevate hepatitis B as an issue deserving of widespread national attention. Recordings of the Summit are available on Hep B United’s YouTube channel – check them out today!

Research, United States

All of Us Research Program

Medicine is not one size fits all. Changing that idea takes All of Us. 

Why is it that an African American woman in her thirties living in a large city tends to receive the same medical care as a man in his sixties of European descent who lives on a farm in rural America, who in turn receives the same treatment as a Korean American mother of two in her forties living in a midwestern suburb? Each of these people has different ancestry, lifestyle, environment, socioeconomic status, and genetics, all of which have a major impact on health. Why should these factors not impact healthcare as well?

The All of Us Research Program, an initiative of the National Institutes of Health, is working to change that. The goal of the program is to diversify the pool of available biomedical data, so that researchers can study many different people and groups, and doctors in turn can then make much more informed decisions about prevention, diagnosis, and treatment of various conditions, that are much more tailored to individual people and to specific groups of people, a practice known as precision medicine. For far too long, doctors have been using data from and information about “the average person” (typically a white man) to make decisions and provide care to everyone in the extraordinarily diverse population of the United States. Now there is a great opportunity for all of us to come together to help them change that! 

The overall objective of the project is to recruit one million or more participants and to follow them over ten years.The Hepatitis B Foundation, in partnership with Hep Free Haw aii and the Asian Engagement and Recruitment Core (ARC), is working to spread the word about the All of Us Research Program to everyone, but particularly among Asian American, Native Hawaiian, and Pacific Islander communities, who are under-represented in this area, historically and currently. 

Why should I participate?

This is an important chance to learn about your own health, including risk factors and exposures.  This is also a great opportunity to help fight diseases, start to close the gaps in a healthcare system that currently does not provide all Americans with the same high quality of healthcare, and more quickly find solutions to serious healthcare problems. Examples of some questions you could help answer are: “How can we prevent the chronic pain that affects more than 100 million people across the US each year? How can we develop cancer treatments that will work the first time, so that we can skip painful trial-and-error chemotherapy? Why does the heart medication Plavix have a much lower success rate among Asian Americans than those of European descent? What would be a more appropriate treatment?” The answers to these questions can be found by gathering more data and more insights from more people. People like you! You have the power to change the course of healthcare for yourself, your community, and future generations.

How Can I Get Involved?

Getting involved is quick and easy! The steps to follow are:

  • Visit www.joinallofus.org to learn more, enroll, and provide consent for the sharing of your electronic health record, where all of your medical information is digitally stored. 
  • Complete a series of surveys that will ask for information about your lifestyle, environment, family history, and background.
  • Provide health measurements like height, weight, waist circumference, and heart rate, among others. 
  • Provide biosamples of blood, urine, and saliva. 
  • Start using apps and technology to track your behaviors and routine activities, starting with a FitBit and including others down the road that are still under development. 

You will receive help and guidance at each stage in the process. 

What about my privacy?

Glad you asked! Any data that you provide will be highly secure and protected. Data security for this project has been built by experts with input from the public. All data is encrypted with identifying information removed, and guaranteed by a Certificate of Confidentiality. Researchers must also agree to a Code of Conduct before accessing the data. You will have access to any and all of your data at any time throughout the program and the highest standard of transparency is practiced. 

What if I don’t want to continue?

You are in control. You can stop your participation at any time. If you have already provided data and no longer want it to be used, you can simply let All of Us know and your data will be destroyed. 

Partners in the Process

All of Us is not a project where researchers know all of the answers and are just mining participants for data. Choosing to participate in All of Us means that you are a partner in the research process. Your thoughts and insights are valuable and you will play a direct role in shaping healthcare for yourself and your community both now and in the future – not just with your data, but as an active participant in the research process, including in the proposal and guidance of future research. 

The All of Us Research Program aims to serve people better, to be more inclusive in biomedical research, to find healthcare solutions that are realistic for and meaningful to more people, and to work toward research and medical breakthroughs that are more reflective of the diversity of the United States. Take the next step to make sure we are Invisible No Longer. Visit www.joinallofus.org to get started today!

 

About Hepatitis B, HBV

ASCO: Updated Guidelines for Hepatitis B Screening

 

 

ASCO: Updated Guidelines for Hepatitis B Screening

The American Society of Clinical Oncology (ASCO), recently updated their hepatitis B screening guidelines. The Provisional Clinical Opinion on hepatitis B is based on a rigorous, evidence-based approach and is periodically updated to reflect recently published data.

Recommendations

The American Society of Clinical Oncology updated their 2020 guidelines on hepatitis B and cancer screening. Most importantly, ASCO recommends universal screening for hepatitis B for patients undergoing cancer therapy.  ASCO states that all cancer patients anticipating systemic anticancer therapy should be screened for hepatitis B through three tests. People living with chronic hepatitis B (HBV) receiving any systemic anticancer therapy should receive antiviral prophylaxis for the duration of anticancer therapy, as well as for at least 12 months after receipt of the last anticancer therapy. Antiviral therapy and management for cancer patients should follow national HBV guidelines, independent of cancer therapy, including management by a clinician experienced in HBV management for prevention of liver diseases such as cirrhosis or liver cancer. Patients with past HBV receiving anticancer therapies associated with an established high risk of HBV reactivation should be started on antiviral prophylaxis at the beginning of anticancer therapy and continued on antiviral therapy for at least 12 months after anticancer therapy ends. Patients with past HBV infection undergoing anticancer therapies that are not clearly associated with a high risk of HBV reactivation should be followed carefully during cancer treatment, with HBsAg and ALT testing every 3 months.

Risk Factors for HBV Reactivation

The article states a few risk factors for hepatitis B reactivation. These risk factors include types of cancers, various anticancer therapies, immunotherapy, radiation therapy and transarterial chemoembolization, other B-cell agents, and special situations. Because of these risk factors for hepatitis B reactivation, it is important for health care professionals to screen for hepatitis B prior to cancer treatment.

What Does This Mean for Providers

Oncologists and healthcare providers have a responsibility to screen their cancer patients for hepatitis B prior to treatment. Screening is especially important among vulnerable populations such as persons of Asian, Pacific Islander and African descent who are disproportionately affected by hepatitis B.

What Does This Mean for Patients

Patients with cancer should also advocate for themselves in healthcare settings to ask for a hepatitis B panel screening before treatment. Your provider will be able to interpret your test results, but here is a simple table to help you understand your hepatitis B panel screening results.

 

Read the full article here.

 

Reference

Hwang, J. P., Feld, J. J., Hammond, S. P., Wang, S. H., Alston-Johnson, D. E., Cryer, D. R., Hershman, D. L., Loehrer, A. P., Sabichi, A. L., Symington, B. E., Terrault, N., Wong, M. L., Somerfield, M. R., & Artz, A. S. (2020). Hepatitis B Virus Screening and Management for Patients With Cancer Prior to Therapy: ASCO Provisional Clinical Opinion Update. Journal of clinical oncology: official journal of the American Society of Clinical Oncology, JCO2001757. Advance online publication. https://doi.org/10.1200/JCO.20.01757

Author

Evangeline Wang, Public Health Program and Outreach Coordinator at the Hepatitis B Foundation

Contact Information: info@hepb.org

Hepatitis B Research

Hepatitis B Research Review: May

This month, researchers at Jilin University in Changchun, China have discovered an anti-HBV role of the HIV-1 host restriction factor SERINC5. At Seoul National University in South Korea, HBV researchers have elucidated a mechanism by which HBV hijacks host transcription regulation. Researchers from the Paul Ehrlich Institute in Langen, Germany have demonstrated that HBV DNA can be sensed by the cGAS/STING pathway, but is not in the context of natural hepatocyte infection.  

  • SERINC5 Inhibits the Secretion of Complete and Genome-Free Hepatitis B Virions Through Interfering with the Glycosylation of the HBV Envelope – Frontiers in Microbiology

This paper from Jilin University in Changchun, China reveals the protein serine incorporator 5 (SERINC5) as a host restriction factor for HBV virion secretion. The SERINC family of proteins facilitate lipid biosynthesis and transport in mammalian cells. SERINC5 was recently shown to restrict the replication of HIV-1 and other retroviruses by incorporating into the membrane of budding virions and preventing their entry into target cells. Additionally, the HIV-1 protein NEF as well as the structurally unrelated murine leukemia virus (MLV) protein glycogag have been shown to down-regulate SERINC5 expression on cell surfaces. In this paper, the role of SERINC5 in HBV replication was examined. SERINC5 was found to inhibit HBV virion secretion but not affect intracellular core particle-associated DNA or RNA. Furthermore, the group found that SERINC5 decreased the glycosylation levels of the HBV surface antigens (HBsAg) LHB, MHB, and SHB (large, medium, and small). In order to determine the possible role of SERINC proteins in HBV replication, SERINC proteins 1, 3, and 5, were each transfected into cells alongside an HBV expression vector using Lipofectamine 2000. Transfection of SERINC plasmids was performed in a dose-responsive manner and was confirmed using Western blot. Transfected cell supernatants were then analyzed using an ELISA for HBsAg. Cells transfected with SERINC5 showed a reduction of HBsAg in the supernatant with increasing amounts of SERINC5. Extracellular HBsAg levels in cells transfected with SERINC1 or SERINC3 were unaffected. Furthermore, compared to cells transfected with a control vector, cells transfected with SERINC5 had less HBV virion DNA in the supernatant as measured by qPCR following immunoprecipitation with an anti-HBsAg antibody. Those cells transfected with SERINC1 or SERINC3 showed no change in extracellular HBV virion DNA compared to the control. Interestingly, intracellular levels of HBV DNA and HBV RNA as measured by Southern blot and Northern blot respectively, showed no change between cells transfected with the control vector or any of the SERINC proteins. Additionally, siRNA knockdown of SERINC5 in HepG2 cells concomitantly transfected with an HBV expression vector yielded increased secretion of HBsAg as measured by ELISA and HBV viron DNA as measured by qPCR following immunoprecipitation with an anti-HBsAg antibody. Next, in order to understand the mechanism of SERINC5-mediated HBV secretion inhibition, flag-tagged LHB, MHB, or SHB were transfected into HepG2 cells alongside either a plasmid expressing HA-tagged SERINC5 or a control vector. Interestingly, the glycosylated forms of all three HBsAg proteins were reduced in cells co-transfected with SERINC5 as measured by Western blot. The group then found that SERINC5 colocalizes with LHB in the Golgi apparatus. This was accomplished by co-transfecting HepG2 cells with LHB fused to enhanced cyan fluorescent protein (LHB-ECFP) alongside HA-tagged SERINC5. Cells were then subjected to immunofluorescence dual staining with an antibody against HA as well as an antibody against GM130, a resident protein of the Golgi. These three signals overlapped, implying that SERINC5 interacts with LHB in the Golgi. This finding was further validated by co-immunoprecipitation experiments showing the interaction of SERINC5 with LHB, MHB, and SHB. The group also found, using mutagenesis studies that the fourth to sixth domains of SERINC5 are required for inhibition of HBV secretion. These domains are different than those involved in HIV-1 inhibition, and the group has concluded that SERINC5 inhibits HBV by a completely different mechanism than it does HIV-1. While SERINC5 inhibits HIV-1 by inducing conformational changes on the viral envelope, it inhibits HBV secretion by preventing glycosylation of HBsAg. This publication demonstrates that SERINC5 is a potential anti-HBV host factor. Stimulation of SERINC5 may be a possible treatment for chronic HBV and SERINC5 may prove useful as a diagnostic marker if it is found to correlate with HBV viral load and chronicity.

  • Viral hijacking of the TENT4–ZCCHC14 complex protects viral RNAs via mixed tailing – Nature Structural & Molecular Biology

This paper from Seoul National University in South Korea identifies the TENT4-ZCCHC14 complex as a host factor which protects viral messenger RNA (mRNA) transcripts from degradation. Terminal nucleotidyltransferases (TENTs) are noncanonical poly(A) polymerases. These enzymes add many adenine residues as well as occasional non-adenosine residues to the 3′ end of mRNA molecules. TENT4A and TENT4B (also known as PAPD7 and PAPD5) extend mRNA poly(A) tails with the occasional non-adenosine residue which is typically a guanosine. The results are mRNAs bearing “mixed tails”. Deadenylases are enzymes which trim poly(A) tails to initiate mRNA degradation. The carbon catabolite repression 4–negative on TATA-less (CCR4-NOT or CNOT) complex is the main cytoplasmic deadenylase complex. CNOT trims mRNA poly(A) tails, but its activity is hindered when it encounters a guanosine reside. Therefore, mixed tails protect mRNAs from being targeted for degradation. Interestingly, the inhibitor of HBV called DHQ-1 was recently found to interact with TENT4A and TENT4B. The protein called zinc finger CCHC domain-containing protein 14 (ZCCHC14) was previously found to be an essential host factor for HBV surface antigen production in a genome-wide CRISPR screen. This publication demonstrates that ZCCHC14 recognizes a pentaloop motif in the HBV post-transcriptional regulatory element (PRE) of HBV mRNAs and in turn recruits TENT4A or TENT4B which provide the mRNAs with a protective mixed tail. Additionally, it was demonstrated that viral mRNAs of the human cytomegalovirus (HCMV) contain a similar pentaloop motif and also receive protective mixed tails. This group used a method which they developed previously called TAIL-seq. This method allows for sequencing of 3′ tails on mRNAs as well as identification of the transcript. First, total RNA is extracted from cells. Ribosomal RNA (rRNA) is removed using an rRNA depletion kit in which ssDNA probes are specifically bound to rRNA which are then digested by RNase H. Next, a biotinylated adaptor sequence is ligated to the 3′ end of RNAs. A low concentration of RNase T1 is then used to partially digest the transcripts. Next, the RNAs are pulled down, using streptavidin, phosphorylated, and gel purified to obtain fragments which are 500-1000 nucleotides in length. This size fractionation step removes small non-coding RNAs such as tRNA, snRNA, snoRNA, and miRNA. Next, a second adaptor sequence is added to the 5′ end of the mRNAs. Finally, the mRNAs are subjected to next generation sequencing (NGS) on an Illumina HiSeq 2500 platform. Two reads are obtained for each mRNA, one from the 3′ adaptor and one from the 5′ adaptor. Sequence information derived from these reads reveals the specific composition of mRNA poly(A) tails. In this publication, TAIL-seq was employed to investigate viral mRNA tailing. HepG2.2.15 cells which express the HBV genome, as well as human foreskin fibroblasts (HEF) infected with HCMV were subjected to TAIL-seq. mRNA 3′ tails of both viruses were found to be guanylated significantly more than cellular mRNAs. Additionally, viral mRNA 3′ tails were longer than cellular ones, indicating slower net deadenylation. To check the mechanism of viral mixed tailing, the noncanonical poly(A) polymerases TENT4A and TENT4B were knocked down using siRNA. TAIL-seq showed a significant reduction of viral mRNA 3′ tail guanylation in TENT4-knockdown cells. Additionally, the half-lives of HBV mRNAs were shown to decrease in TENT4-knockdown HepG2.2.15 cells as measured by RT-qPCR at intervals following the addition of the transcription blocker actinomycin D. In order to determine how HBV mRNAs recruit TENT4A and TENT4B, formaldehyde-based crosslinking and immunoprecipitation sequencing (fCLIP-seq) was employed on HepG2.2.15 cells. fCLIP-seq reveals what RNA sequences proteins bind to. In fCLIP-seq, formaldehyde is used to crosslink RNA-protein interactions. RNA-protein complexes are then “pulled down” using an antibody and run on a gel. The protein may then be degraded using proteinase K and RNA molecules may be sequenced. RNA sequencing reads from fCLIP-seq of the HBV genome were enriched in lysates pulled down using antibodies against TENT4A or TENT4B compared to input cell lysate and that pulled down using normal mouse IgG. Importantly, the greatest enrichment occurred specifically in the PRE region of HBV mRNAs. The group goes on to show that the sterile alpha motif (SAM) of ZCCHC14 binds to the stem loop ⍺ region of the PRE and recruits TENT4 proteins. This publication demonstrates that both HBV and HCMV have taken advantage of host mRNA transcription regulation to prolong transcript half-life. ZCCHC14, TENT4A, and TENT4B may be possible host targets for HBV or HCMV antiviral treatments.

 
  • Hepatitis B Virus DNA is a Substrate for the cGAS/STING Pathway but is not Sensed in Infected Hepatocytes – Viruses   This paper from the Paul Ehrlich Institute in Langen, Germany shows that HBV DNA is sensed by cGAS, but not in natural HBV infection of hepatocytes. Cyclic guanosine monophosphate-adenosine monophosphate (cGAMP) synthase (cGAS), is a pattern recognition receptor (PRR) that senses cytoplasmic double-stranded DNA (dsDNA). In response to dsDNA binding, cGAS catalyzes the production of 2’3′-cGAMP, a cyclic dinucleotide (CDN) which activates stimulator of interferon genes (STING) by direct binding. Once activated, STING signaling results in the activation of transcription factors promoting the production of type I interferons (IFN-I) and proinflammatory cytokines including tumor necrosis factor alpha (TNFα). IFN-I production and secretion lead to the activation of numerous IFN-stimulated genes (ISGs) which induce a robust antiviral state in the cell. The cGAS/STING pathway is a key component of innate immunity, protecting cells from bacterial and viral infections. How viruses interact with host innate immune sensors such as cGAS is important for understanding their pathogenesis. While the innate immune mechanisms activated by HBV infection remain disputed, HBV is largely considered to be a stealth virus in that it bypasses host innate immunity. Some groups have postulated that the HBV X protein (HBx) or HBV polymerase may inhibit innate immune responses. In this publication it is demonstrated that HBV RNAs are not immunostimulatory, however HBV DNA does elicit an innate immune response mediated by the cGAS/STING pathway. In order to test the immunostimmulatory potential of HBV nucleic acids, they were transfected at multiple concentrations into monocyte-derived dendritic cells (MDDCs) generated from primary human peripheral blood mononuclear cells (PBMCs). Following transfection, mRNA of the gene ISG54 was measured by RT-qPCR. ISG54 was selected as the read-out for innate immune signaling because it is a direct target of the transcription factor IRF3 which is activated downstream of both RIG-I (RNA-sensing) and cGAS/STING (DNA-sensing) pathways. HBV nucleic acids were extracted from HBV virions and quantified prior to transfection. Some groups of nucleic acids were subjected to either DNase or RNase digestion, leaving only HBV RNA or DNA respectively. Total HBV nucleic acids stimulated ISG54 transcription in a dose-dependent manner. Similarly, HBV DNA also stimulated ISG54 transcription. However, transfection of HBV RNA alone did not activate ISG54 transcription, implying that only HBV DNA elicits an innate immune response. In order to test which specific innate immune pathway senses HBV DNA, the human monocytic leukemia cell line THP-1 was used. CRISPR/Cas9 genome editing was used in THP-1 cells to knockout (KO) cGAS, STING, or mitochondrial antiviral-signaling protein (MAVS), which is a key node downstream of the RNA-sensing RIG-I-like receptor (RLR) protein family. Transfection with HBV nucleic acids caused a high level of ISG54 transcription in wild type (WT) and MAVS KO cells which was abrogated when HBV nucleic acids were treated with DNase prior to transfection. However, HBV nucleic acids caused no measurable ISG54 transcription in either cGAS KO or STING KO cells. Next, the group wanted to determine if HBV activates the cGAS/STING pathway in its natural infection of hepatocytes. The levels of cGAS, STING, and other PRRs in a panel of cells were determined using RT-qPCR. The hepatocellular carcinoma cell line HepG2 as well as primary human hepatocytes (PHH) were shown to express less cGAS and STING than Kupffer cells, MDDCs, THP-1 cells, or monocyte derived macrophages (MDMs). Next, HepG2 cells expressing the human sodium taurocholate cotransporting polypeptide used for HBV cell entry (HepG2-hNTCP) and PHHs were transfected with HBV nucleic acids. Both hepatocyte types showed a dose-responsive increase in ISG54 transcription when transfected. Finally, HepG2-hNTCP cells and PHHs were infected with HBV and HBV RNA and ISG54 mRNA were quantified by RT-qPCR. Although both cell types were efficiently infected, they showed no induction of ISG54 across several days. These results indicate that although hepatocytes are capable of sensing transfected HBV genomic DNA via cGAS, they are not able to do so in the context of a natural infection. One possible explanation for the failure of hepatocytes to sense HBV nucleic acids is that they are shielded by the viral nucleocapsid upon infection and during the formation of replication intermediates. Another possibility is that the level of HBV nucleic acids in a natural infection is too low to activate cGAS/ STING, given that these proteins are sparse in hepatocytes. This publication demonstrated for the first time that HBV RNAs are not immunostimulatory, while HBV DNAs activate the cGAS/STING pathway. This finding shows that it may be possible to utilize the cGAS/STING pathway in order to eradicate chronic HBV infection. Perhaps small molecules which destabilize HBV nucleocapsids may be used to expose the DNA of intracellular HBV virions, leading to the activation of the cGAS/STING pathway and an innate antiviral response.

Meet our guest blogger, David Schad, B.Sc., Junior Research Fellow at the Baruch S. Blumberg Institute studying programmed cell death such as   apoptosis and necroptosis in the context of hepatitis B infection under the direction of PI Dr. Roshan Thapa. David also mentors high school students from local area schools as part of an after-school program in the new teaching lab at the PA Biotech Center. His passion is learning, teaching and collaborating with others to conduct research to better understand nature.

 

Hepatitis B Research

Hepatitis B Research Review: February

 

Welcome to the Hepatitis B Research Review! This monthly blog shares recent scientific findings with members of Baruch S. Blumberg Institute (BSBI) labs and the hepatitis B (HBV) community. Technical articles concerning HBV, Hepatocellular Carcinoma, and STING protein will be highlighted as well as scientific breakthroughs in cancer, immunology, and virology. For each article, a brief synopsis reporting key points is provided as the BSBI does not enjoy the luxury of a library subscription. The hope is to disseminate relevant articles across our labs and the hep B community. 

 Summary: This month, researchers in Beijing, China have reported that a therapeutic vaccine composed of polylactic acid microparticles loaded with HBV surface antigen and the mouse STING agonist DMXAA showed efficacy in clearing HBV infection in a mouse model. Researchers from Wuhan, China have reported that SOX2, a transcription factor important for cell proliferation is also a host restriction factor for HBV infection. Also, researchers from the University of Boulder in conjunction with Dr. James Chen’s lab in Dallas have reported the synthesis of two potent cGAS inhibitors.

The incorporation of cationic property and immunopotentiator in poly (lactic acid) microparticles promoted the immune response against chronic hepatitis B – Journal of Controlled Release

This paper from the Chinese Academy of Sciences in Beijing, introduces a microparticle vaccine which may be used to treat chronic HBV infection (CHB). The 1μm diameter microparticle is made from polylactic acid (PLA), which is a biodegradable polymer typically synthesized from plant starch. The microparticle also contains didodecyldimethylammonium bromide (DDAB) which is a double-chain cationic surfactant. This group has previously shown that DDAB may be used as a carrier for the HBV surface protein (HBsAg). DDAB also gives the microparticle a positive charge, which accelerates its phagocytosis into antigen-presenting cells (APCs) and facilitates its escape from lysosomal degradation once in the cell. Additionally, the group loaded microparticles with the mouse STING agonist  5,6-dimethylxanthenone-4-acetic acid (DMXAA). The microparticles were refereed to as DDAB-PLA (DP) and DDAB-PLA-DMXAA (DP-D) respectively. Both types of microparticle were saturated with HBV surface antigen (HBsAg). The microparticles were first tested on mouse bone marrow dendritic cells (BMDCs). Administration of microparticles caused less than a 20% reduction of cell viability in these cultures. BMDCs treated with DP-D microparticles had at least ten-fold more expression of IRF-7 and IFN-β mRNA as measured by RT-qPCR than those treated with HBsAg or DP microparticles alone. Surprisingly, the DP-D microparticle-treated cells also had about twice the expression of these genes compared to the positive control HBsAg + DMXAA, which contained ten times more DMXAA than the microparticles. This indicates that the DP-D microparticles induced the STING pathway with high efficiency due to their bioavailability. Next, the group found that DP-D microparticles induced the highest level of chemokine expression (measured via RT-qPCR) and immune cell recruitment (measured via flow cytometry) at the site of injection in inoculated mice compared with HBsAg alone, HBsAg with aluminum salts (traditional vaccine adjuvant), and DP microparticles. This result shows that the DP-D microparticles induced both an innate immune response and an adaptive immune response in mice. Further, the group showed that BMDCs treated with DP-D microparticles had a high level of maturation, expressing CD40, CD86, and MHCII molecules on their surface as measured by flow cytometry. Finally, the group administered the HBsAg-primed microparticles to mice infected with recombinant HBV (rAAV-1.3HBV virus, serotype ayw). Mice treated with both types of microparticles showed a higher cytokine response as well as a higher titer of anti-HBsAg antibody as measured by ELISA. Mice treated with the DP-D microparticles had the most profound immune cell activation and  fastest clearance of serum HBsAg. The microparticle vaccine introduced in this publication is promising because it is highly efficient in delivering antigen to immune cells. The microparticles are unique in that they contain a small molecule STING agonist inside. This design is clever because this vaccine stimulates the innate immune system by activating STING and the adaptive immune system by displaying HBsAg to APCs. This promotes HBV clearance in a multifaceted approach: immune cells produce cytokines through the STING pathway, T cells recognize and destroy infected cells, and B cells secrete anti-HBsAg antibodies to neutralize newly formed viruses. This publication highlights the versatility of biodegradable microparticle technology in designing unique approaches to combat infection. Micro- and nanoparticle delivery systems represent a promising avenue for future drugs to combat HBV and other viruses.

SOX2 Represses Hepatitis B Virus Replication by Binding to the Viral EnhII/Cp and Inhibiting the Promoter Activation – Viruses
This paper from Wuhan University in China identifies the protein sex determining region Y box 2 (SOX2) as a host factor that restricts HBV replication. SOX2 is a transcription factor critical for cell proliferation and the tumorigenecity of solid tumors. In 2006, expression of SOX2 along with three other transcription factors was shown to convert somatic cells into induced pluripotent stem cells. Overexpression of SOX2 indicates poor prognosis in patients undergoing resection of HCC. In HCC cells, SOX2 has also been found to induce the expression of programmed death ligand-1 (PD-L1), leading to the tumor’s evasion of the host immune system. Previously, it has been demonstrated that HBV infection induces increased expression of SOX2 in hepatocytes. This study demonstrates that SOX2 inhibits HBV replication by binding to the Enhancer II (EnhII) and Core Promoter (Cp) regions of the HBV genome. By binding to the EnhII/Cp region, SOX2 disrupts the transcription of the mRNA species precore, core, polymerase, and pgRNA. This reduction of mRNA transcription results in reduced levels of core-associated DNA, HBV surface antigen (HBsAg), and HBV e antigen (HBeAg). To learn this, the group co-transfected both HepG2 and Huh7 cells with a fixed concentration of  HBV 1.3-mer plasmid DNA alongside variable concentrations of Flag-tagged SOX2 in pcDNA3.1 plasmid DNA. Cells transfected with higher concentrations of SOX2 plasmid DNA showed reduced levels of HBV mRNAs (3.5, 2.4, and 2.1 kb) via Northern blotting. SOX2-transfected cells also showed reduced levels of HBV core-associated DNA via qPCR as well as reduced levels of both HBsAg and HBeAg via ELISA. Next, in order to learn  if SOX2 interacts directly with an HBV promoter, a dual-luciferase reporter assay was implemented. Here, four vectors were used, each containing one of the HBV enhancer and/or promoter sequences (preS1, preS2, EnhⅡ/Cp, and EnhⅠ/Xp) upstream of a firefly luciferase reporter. Each of these firefly luciferase reporter vectors were co-transfected into HepG2 cells alongside variable concentrations of SOX2 plasmid DNA. A plasmid encoding Renilla luciferase was also included at a constant concentration in each transfection as a control for transfection efficiency. While firefly luciferase has an emission of 625 nm (red), Renilla luciferase has an emission of 525 nm (green). Therefore, levels of red fluorescence were used to measure the activity of the HBV enhancer/promoter sequences and levels of green fluorescence were utilized as a control for transfection efficiency. Co-transfection with SOX2 significantly diminished the luciferase activity of the EnhII/Cp reporter only and in a dose-responsive manner, indicating its interaction with that region of the HBV genome. Further, using HBV-producing HepAD38 cells, chromatin immunoprecipitation coupled with quantitative PCR (ChIP-qPCR) was used to isolate SOX2 protein and then determine what DNA sequence it was bound to. The EnhII/Cp sequence was found to be highly enriched on SOX2 protein. In order to determine which part of the SOX2 protein is required for binding to the EnhII/Cp region, truncated forms of SOX2 were generated in the pcDNA3.1 plasmid. Using the assays described above, it was found that only SOX2 mutants lacking the high mobility group (HMG) domain were unable to bind to the EnhII/Cp region and suppress HBV products. Interestingly, it was found that SOX2 mutants lacking the transcription activation (TA) domain were still able to bind to the EnhII/Cp region. Further, it was demonstrated by Western blot of subcellular fractions and immunofluorescence that SOX2 mutants lacking the HMG domain were unable to enter the nucleus. Finally, studies were performed in an in vivo BALB/c mouse model. Mice were given a hydrodynamic injection of an adeno-associated viral vector conferring HBV (pAAV-HBV1.3) alongside pcDNA3.1 plasmid DNA conferring SOX, SOX2 lacking HMG domain ( SOXΔHMG), or empty vector. Levels of HBsAG and HBeAg in the blood at days two and four were reduced only in mice given the full length SOX2 plasmid. Additionally, mice given the full length SOX2 plasmid had a reduction of 3.5kb HBV mRNA in liver tissues as measured by qPCR and a lower abundance of HBV core antigen (HBcAg) in liver tissues as measured by immunohistochemical staining. This study shows that SOX2 protein, previously shown to be upregulated by HBV, plays an anti-HBV role in the liver. SOX2 is therefore a new host restriction factor of HBV replication. SOX2 may be one protein which contributes to HBV-induced hepatocarcinogenesis, given its role in promoting the transcription of genes involved in cell proliferation. In the future, SOX2 may be utilized for its anti-HBV activity or targeted for the treatment of HCC.

 Discovery of Small Molecule Cyclic GMP-AMP Synthase Inhibitors – The Journal of Organic Chemistry

This paper from the University of Colorado Boulder introduces the development of novel small molecule inhibitors of the protein cyclic GMP-AMP synthase (cGAS). This publication is in conjunction with Dr. James Chen’s laboratory at the University of Texas Southwestern Medical Center in Dallas, Texas. Dr. Chen’s lab discovered cGAS in 2012. cGAS is a cytosolic, double-stranded DNA (dsDNA)-sensing protein. It belongs to the nucleotidyltransferase family of enzymes which transfer nucleoside monophosphates, the substituents of nucleic acids. When cGAS recognizes dsDNA, it synthesizes the cyclic dinucleotide cyclic GMP-AMP (cGAMP). cGAMP acts as a second messenger and activates the stimulator of interferon genes protein (STING). Once activated, STING triggers TBK1- and IKK-mediated activation of the transcription factors interferon regulatory factor 3 (IRF3) and nuclear factor kappa-light-chain-enhancer of activated B cells (NF-kB). In the nucleus, IRF3 and NF-kB induce the expression of type I interferons and other inflammatory cytokines. cGAS is essential for detecting foreign pathogens which contain dsDNA and triggering an innate immune response to clear them. However, excessive or dysfunctional cGAS activity may lead to chronic inflammation and/or autoimmunity. Pharmacologic inhibition of cGAS may provide treatments for diseases including Aicardi-Goutiés syndrome (AGS), lupus erythematosus, and cancer. Current small molecule inhibitors of cGAS are limited by poor specificity and/or cellular activity. In this study, a high throughput virtual screen (HTVS) was utilized to screen about 1.75 million drug-like compounds for activity against the dimer-forming and DNA-binding faces of mouse cGAS (mcGAS). mcGAS was utilized for the in silico screen because the human cGAS (hcGAS)-DNA complex was only recently published. From this virtual screen, ten compounds were further investigated, leading to the selection of one lead compound. This lead was further optimized for greater potency through chemical modifications resulting in the analogues CU-32 and CU-76. The IC50 of both compounds is below 1µM. To test these compounds’ selectivity for cGAS, human monocyte cells THP-1 were either transfected with  interferon-stimulatory DNA (ISD) or infected with Sendai virus (SeV). ISD is a 45-basepair DNA known to activate cGAS, while SeV is a single-stranded RNA (ssRNA) virus known to activate the RIG-I-MAVS pathway; both stimuli are known to result in IRF3 activation and dimerization. Following treatment with both compounds, Western blot of the cells was conducted probing for the formation of IRF3 dimers. In ISD-treated cells, CU-32 and CU-76 inhibited the formation of IRF3 dimers in a dose responsive manner. Neither compound had any effect on IRF3 dimer formation in SeV-infected cells. This result indicates that these inhibitors are selective to cGAS. Using in silico molecular docking studies, the group speculates that these compounds disrupt the interface of the cGAS dimer, allosterically inhibiting dimerization. The discovery of novel cGAS inhibitors is exciting and important for multiple reasons. These compounds, if made commercially available will allow for improved experimentation investigating the cGAS/STING pathway. If these compounds or their derivatives are found to be safe and effective in humans, they may be promising candidates for the treatment of autoimmune disorders or cancer.

 

Meet our guest blogger, David Schad, B.Sc., Junior Research Fellow at the Baruch S. Blumberg Institute studying programmed cell death such as apoptosis and necroptosis in the context of hepatitis B infection under the direction of PI Dr. Roshan Thapa. David also mentors high school students from local area schools as part of an after-school program in the new teaching lab at the PA Biotech Center. His passion is learning, teaching and collaborating with others to conduct research to better understand nature.

 

Baruch S. Blumberg Institute