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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 

About Hepatitis B, HBV, Hepatitis B Awareness, Liver, Liver Cancer, Liver Health, Living with Hepatitis B

Understanding the Impact of Drinking Alcohol on Liver Health

 

 

 

 

 

 

 

 

 

 

April is Alcohol Awareness Month!  

Hepatitis B is a virus that can damage the liver. The liver is a critical organ in the human body and is responsible for energizing cells, removing toxins and waste, and strengthening the immune system. It is most commonly understood as the body’s primary filtering system and storage unit. Alcohol consumption has been shown to cause serious problems for the liver as it overwhelms the liver’s ability to carry out important tasks. 

Important Functions of the Liver: 

Bile Production: Bile is a greenish liquid released from the liver and into the gallbladder (a small sac located under the liver which stores bile) that helps to break down fats so they can be used by the body. The liver produces and cleans bile so that it can move through the small intestine. Bile also helps to remove some toxins and waste products such as excess cholesterol (a type of fat necessary for digestion and healthy cells) and bilirubin (a yellow substance made from old red blood cells) to keep your immune system healthy and clean. Even though cholesterol is an important substance, excess amounts of cholesterol can clog the bloodstream and cause serious problems like heart disease. This is why the liver removes unwanted cholesterol from the body. Similarly, bilirubin is made during the production of bile and is a waste product of old and broken-down red blood cells. A healthy liver can filter out and remove bilirubin from the body. High amounts of bilirubin may indicate damage to the liver or serious liver disease. 

Natural Detoxification: The liver is most notably known for its natural detox system, which is one of its most important functions. The liver removes toxins, foreign substances, and harmful waste from the bloodstream such as alcohol, drugs, and other chemicals through different ways. Depending on the substance, it may remove the toxin through bile, break it down into safer substances so the toxins don’t cause harm. The liver can even store the toxins, so the rest of the body is safe. It is important to understand that, even though the liver has a remarkable filtering system, it has limits and should not be put under excess stress.  

Blood Glucose Regulation: Glucose is a sugar molecule and the most important source of energy for your body. Glucose enters the body through foods high in carbohydrates, such as grains, potatoes and fruits. During the digestive process, glucose molecules from foods are broken down and used by the body to energize cells and maintain the most basic yet critical functions of the immune system. Glucose turns into blood glucose or blood sugar when it travels through the bloodstream. For glucose to be used as energy by the cells, it needs assistance from insulin (a hormone released by the pancreas), which helps it move around and get to the cells. Think of insulin as the key and glucose as the lock. The key opens the lock to the door. Similarly, insulin opens the door so that glucose can get inside the cells and provide energy. High levels of blood glucose and the inability to produce or use insulin properly can result in diabetes. Even though glucose comes from food, the human body can use the liver to produce its own glucose. The liver is basically the storage unit for glucose, saving it for use at a later time in the form of glycogen. Glycogen or stored glucose is released on an “as– needed basis.” When the body is running low on glucose, the liver uses fats to provide energy and saves the remainder of the glucose for the most important organs that need sugar for energy, such as the brain and kidneys.  

Alcohol Consumption and the Liver: 

Alcohol is a toxic substance and is known to cause a powerful effect on the brain’s ability to understand and process information because the brain is a very sensitive organ. This is why alcohol can be so addictive for some people. It causes chemical effects (excess release of dopamine, a hormone that makes you feel good) in the brain, which can lead to addiction. Increased intake of alcohol is also linked to several health issues such as cancer, heart disease, digestive problems and liver disease. Alcohol use is also associated with injuries such as fatal car crashes and alcohol overdose.  

Since the liver is the body’s natural detox system, alcohol consumption disrupts the liver from carrying out its most important tasks. For example, the liver’s role is to remove alcohol from the blood. Breaking down ethanol (found in alcohol) causes some liver cells to die. The liver is able to make new cells but too much alcohol or long-term use can reduce the ability to make repairs. The U.S. Centers for Disease Control and Prevention (CDC) defines more than two drinks per day for men and one drink per day for women to be excessive alcohol use. Drinking too much inflames the liver and disrupts its filtering system. Damaged and weakened liver cells are unable to remove the toxins from alcohol from the blood. When liver cells are destroyed, they are unable to carry out the other important tasks such as producing bile, making proteins and storing glucose.  

The most common type of alcohol– related disease is fatty liver. This is when excess amounts of fat are found in the liver. This causes the liver to swell, and overtime may cause inflammation or cirrhosis (scarring of the liver). Any damage to the liver cells, whether it’s through swelling, inflammation, or scarring, disrupts the liver’s ability to carry out its most essential functions. Cirrhosis or scarring of the liver is the most dangerous thing that can happen to the liver. It means that healthy liver tissue and cells are now being replaced by scar tissue from liver damage. The symptoms of liver damage from alcohol use may consist of fever, vomiting, nausea, jaundice, abdominal pain, fatigue and loss of appetite. This process is not sudden and usually takes a long time to happen. However, symptoms and signs may not always be present.  

What People Living with Hepatitis B Should Know About Drinking Alcohol? 

People living with hepatitis B should know that the liver is already weakened by the virus. The hepatitis B virus attacks the healthy liver cells and tissue and causes inflammation. Alcohol use can result in more problems and can put greater stress on the liver. It can speed up the harm to the liver, resulting in serious liver disease. It can lower the body’s ability to defend itself from foreign invaders, such as other viruses and bacteria. Studies have shown that alcohol intake can result in rapid HBV replication, further increasing the risk of cirrhosis and liver disease.  

Love your Liver! 

In a recently published statement by the World Health Organization, it was found that “no amount of alcohol is safe when it comes to health.” It is important to understand that alcohol, whether little or much, is a toxin and puts the liver at the highest risk as the liver is the natural detox for unwanted and harmful substances. The liver does a lot to keep our bodies protected from harm and acts as a natural defense. But, like people, the liver can also experience burnout. It is very important to keep our liver healthy, safe, and away from harm! 

References: 

https://www.hopkinsmedicine.org/health/conditions-and-diseases/alcoholinduced-liver-disease 

https://www.verywellhealth.com/definition-of-bile-1759867 

https://www.ncbi.nlm.nih.gov/books/NBK470209/ 

https://dtc.ucsf.edu/types-of-diabetes/type1/understanding-type-1-diabetes/how-the-body-processes-sugar/the-liver-blood-sugar/#:~:text=When%20you’re%20not%20eating%20%E2%80%93%20especially%20overnight%20or%20between%20meals,in%20a%20process%20called%20glycogenolysis. 

https://columbiasurgery.org/liver/liver-and-its-functions#:~:text=The%20liver%20filters%20all%20of,fats%20and%20carry%20away%20waste. 

http://hepctrust.org.uk/information/liver/detoxification 

https://www.who.int/europe/news/item/04-01-2023-no-level-of-alcohol-consumption-is-safe-for-our-health#:~:text=The%20risks%20and%20harms%20associated,that%20does%20not%20affect%20health. 

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7081008/#:~:text=Hepatitis%20B%20virus%20(HBV)%20and,allows%20HBV%20to%20persist%20chronically. 

https://www.mayoclinichealthsystem.org/hometown-health/speaking-of-health/effects-of-alcohol-on-your-health-and-liver 

Liver Health

Hemochromatosis: Treatment, the Liver, and Hepatitis B

Genetic conditions can be an unfortunate part of life, but with information and support, some can be managed. By sharing your family health history and learning about genetic disorders that run in the family, measures can be taken to prevent damage and help your loved ones stay healthy!

Hereditary hemochromatosis is one of the most common genetic disorders. The Centers for Disease Control and Prevention (CDC) reports that approximately 80-90% of hemochromatosis cases are from the hereditary form of the condition1. Due to a mutation in the HFE gene, the body begins to produce too much iron – a process

Northern European Countries

called iron overload. Iron overload can cause complications in the liver, heart, and pancreas2. According to the National Organization for Rare Disorders (NORD), hereditary hemochromatosis has several names that all refer to the same disorder: bronze diabetes, classic hemochromatosis, hemochromatosis type I, hemosiderosis, HFE-related hemochromatosis, HH, and primary hemochromatosis. The two non-hereditary forms of hemochromatosis are secondary hemochromatosis and neonatal hemochromatosis. Both are considered to be rare. Although the hereditary form is common, the exact number of patients worldwide is unknown. Globally, it is estimated that 1 in 227 individuals of Northern European descent is living with hemochromatosis. In the U.S, an estimated 1 million individuals are impacted as well 2. 

Not everyone who has the mutant gene develops hemochromatosis. These individuals are known as “carriers”; they can pass the gene on without suffering from the symptoms. Symptoms include joint pain, fatigue, abdominal pain, unexplained weight loss, and a bronze or grey skin color. For most patients, symptoms do not appear until middle age (40-60) because it takes time for the iron to build up in the body. Males tend to be affected more often than women and experience symptoms at a younger age as well 3,2. Some carriers for the mutant gene may develop a more severe version of the disorder called juvenile hemochromatosis. With juvenile hemochromatosis, patients experience an excessive amount of iron overload that can lead to liver and heart damage between the ages of 15 and 30.

Hemochromatosis, the Liver, and Hepatitis B

While the body needs a certain amount of iron to function, iron overload can be dangerous.  Hemochromatosis can lead to two major liver issues: hepatomegaly and cirrhosis. Hepatomegaly is the enlargement of the liver and cirrhosis is the scarring of the liver. Both issues can impair the liver’s ability to function and filter out toxins that enter the body. They can also increase a person’s risk of developing liver cancer. Recently, two major studies by the University of Exeter and the U.K. University of Connecticut, and the U.S. National Institute on Aging have found that a person living with hemochromatosis has four times the risk of developing a liver disease than a person who is living with the disorder.

For individuals living with hepatitis B, it is extremely important to understand any behaviors or conditions that may have a negative impact on your liver. Since one liver disease can increase your risk of another liver disease, it is important to identify the disorder as early as possible, especially if you have any of the following risk factors:

Risk Factors for Hereditary Hemochromatosis:

  • Men or postmenopausal women
  • Of Northern European descent
  • Having a relative with hemochromatosis

Risk Factors for Secondary Hemochromatosis:

  • Alcoholism
  • Family history of diabetes, heart disease, or liver disease
  • Taking iron or vitamin C supplements

Hepatitis B patients do not have an increased risk of developing hemochromatosis4. However, if you have any of the above risk factors, it is important to get tested. Hemochromatosis can easily be identified by a comprehensive look at a person’s family health history, a physical exam, and a simple blood sample. Your doctor will then use the blood sample to run a series of tests that may include transferrin saturation (TS), serum ferritin, or liver function tests. In certain cases, the doctor may also perform genetic testing to see if the mutant HFE gene is present.

Treatment

Treatment for hemochromatosis is available! Based up tests results, family history, medical history, and the appearance of symptoms, the doctor may suggest a few different treatment methods. In therapeutic phlebotomy – the most common treatment method – a patient undergoes regular blood draw to lower the amount of iron in the body. This method is effective, affordable, and typically lasts for an extended period of time. Through iron chelation therapy, patients can either receive an injection or orally consume a medication that will lower the amount of iron in your blood. Finally, some doctors may suggest changes to your diet, such as eating less vitamin C, avoiding alcohol and shellfish, and not taking iron supplements. Dietary changes are mainly used to prevent liver damage.

For more information on HH, you can visit the National Heart, Lung, and Blood Institute.

References:

  1. Grosse, S. (2017). A New Public Health Assessment of the Disease Burden of Hereditary Hemochromatosis: How Clinically Actionable is C282Y Homozygosity? [Blog]. Retrieved from https://blogs-origin.cdc.gov/genomics/2017/08/16/a-new-public-health-assessment/
  2. National Organization for Rare Disorders. (2019). Classic Hereditary Hemochromatosis. Retrieved from https://rarediseases.org/rare-diseases/classic-hereditary-hemochromatosis/#general-discussion
  3. National Institute of Diabetes and Digestive and Kidney Diseases. (2019). Hemochromatosis. Retrieved from https://www.niddk.nih.gov/health-information/liver-disease/hemochromatosis
  4. Beaton, M., & Adams, P. (2007). The Myths and Realities of Hemochromatosis. Canadian Journal Of Gastroenterology, 21(2), 101-104. doi: 10.1155/2007/619401

Living with Hepatitis B

You Have Hepatitis B, Will Liver-Detox Diets or Supplements Help? Experts Weigh In

Courtesy of Pixabay.
Courtesy of Pixabay.

By Christine Kukka

Manufacturers and health “gurus” around the world market liver detox diets and supplements that promise to remove toxins, reduce inflammation, strengthen the immune system and help you lose weight. But do they help people with chronic hepatitis B?

A team of Australian researchers examined these claims and concluded, “At present, there is no compelling evidence to support the use of detox diets for weight management or toxin elimination.

“Considering the financial costs to consumers, unsubstantiated claims and potential health risks of detox products, they should be discouraged by health professionals and subject to independent regulatory review and monitoring,” the authors wrote in their report published in the Journal of Human Nutrition and Dietetics.

Let’s look at some of the diets and products the researchers evaluated.

  • The Cleanser/Lemon Detox Diet that requires 10 days of drinking only lemon juice, water, cayenne pepper and tree syrup, along with sea salt water and a mild laxative herbal tea.

    Courtesy of Pixabay.
    Courtesy of Pixabay.
  • The Liver Cleansing Diet featuring vegetarian, high-fiber, low-fat, dairy-free, minimally processed food for eight weeks, along with “liver tonics and Epsom salts.”
  • Martha’s Vineyard Detox Diet: A 21-day regimen features vegetable juice and soup, herbal tea and special powders, tablets, cocktails and digestive enzymes.
  • Dr Oz’s 48-hour Weekend Cleanse: A two-day program featuring quinoa, vegetables, fruit juices and smoothies, vegetable broth and dandelion root tea, and;
  • The Hubbard purification rundown: This requires increasing doses of niacin with a range of A, D, C, E and B vitamins, a variety of minerals and a blend of polyunsaturated oils and mandates that adherents spend five hours in a hot sauna daily.

According to researchers, none of these plans have been evaluated scientifically, which includes using a control group that receives a placebo instead of the treatment. The L. Ron Hubbard plan, promoted by the Church of Scientology, received some scientific evaluation after the purification protocol was applied to 14 rescue workers who were exposed to high levels of chemicals after the 9/11 collapse of the World Trade Center.

The program used niacin supplements, sweating in a sauna and physical exercise to get rid of toxins stored in body fat — which is where nearly all toxins end up – not in liver cells.

“The firemen’s scores on several memory tests reportedly improved after the intervention but the sample size was small and no control group was included,” researchers noted. The Church of Scientology used a similar program and employed a small control group, but the length of the treatment varied widely (ranging from 11 to 89 days). “Rather dubiously, the average increase in IQ in the experimental group was reported to be 6.7 points, despite the average intervention length being only 31 days,” researchers noted.

As with herbal supplements sold around the world, there is also no regulation of the detox diet industry.

“At present, the European Union has refused to authorize the detoxification claims of a dozen nutritional substances (including green coffee, grapefruit and taurine), although there are hundreds of other ‘detox’ products that do not yet appear on the Health and Nutrition Claims Register,” researchers wrote.

More alarming, it appears these companies are now using new marketing terms, such as “reinvention” and “revamp,” instead of detox and cleansing, which makes it difficult for government agencies to regulate these products.

“In some cases, the components of detox products may not match their labels, which is a potentially dangerous situation,” researchers noted. “In Spain, a 50-year-old man died from manganese poisoning after consuming Epsom salts as part of a liver cleansing diet.”

So why are these diets and supplements so popular?

“The seductive power of detox diets presumably lies in their promise of purification and redemption, which are ideals that are deep-rooted in human psychology,” researchers observed. “These diets … are highly reminiscent of the religious fasts that have been popular throughout human history. Unfortunately, equating food with sin, guilt and contamination is likely to set up an unhealthy relationship with nutrition. There is no doubt that sustained healthy habits are of greater long-term value than the quick fixes offered by commercial detox diets.”

Baruch S. Blumberg Institute