Featured Research

from universities, journals, and other organizations

Combination of direct antivirals may be key to curing hepatitis C

Date:
May 12, 2010
Source:
University of Illinois at Chicago
Summary:
A combination of antiviral drugs may be needed to combat the drug resistance that rapidly develops in potentially deadly hepatitis C infections, a new study using sophisticated computer and mathematical modeling has shown.

A combination of antiviral drugs may be needed to combat the drug resistance that rapidly develops in potentially deadly hepatitis C infections, a new study using sophisticated computer and mathematical modeling has shown.

Using probabilistic and viral dynamic models, researchers at the University of Illinois at Chicago, Oakland University and Los Alamos National Laboratory predict why rapid resistance emerges in hepatitis C virus and show that a combination of drugs that can fight three or more mutated strains may be needed to eradicate the virus from the body. They compared their model with data from a clinical trial of the new direct-acting antiviral medication telaprevir.

The findings are published in Science Translational Medicine.

Hepatitis C is a progressive liver disease that can lead to cirrhosis and liver cancer. Current standard treatment is a combination of the antiviral drugs interferon and ribavirin for a period of 24 to 48 weeks -- a regimen that is long and expensive, carries side effects, and is successful only in about half of patients.

Intensive effort has focused on developing direct antiviral drugs. But the virus is genetically diverse, and so may be particularly prone to develop resistance, said Harel Dahari, research assistant professor of hepatology in the UIC College of Medicine and one of the paper's co-authors.

One way to combat resistance would be to administer multiple drugs, each with a different mechanism of inhibiting the virus.

"We found that rapid emergence of resistance to these types of drugs is due to a population of viruses already present, allowing the resistant virus to become the dominant strain," said Dahari.

The researchers suggest that a combination of new antiviral drugs will be needed to fight all of the resistant virus strains and achieve better cure rates for the disease.

"We are moving to a new era where we can treat these patients with direct-acting agents against the virus, in which we specifically target the life-cycle of the virus," Dahari said.

To replace the standard treatment, four or more different types of direct drugs may be needed, Dahari said. However, some patients may need fewer drugs. It depends on the level of the virus in their blood, among other factors.

It is frustrating for patients to go through a long, difficult treatment and know that they might not be cured, said Dr. Scott Cotler, associate professor of medicine at UIC and a hepatologist who treats patients at the University of Illinois Medical Center's Walter Payton Liver Center.

"Patients are looking forward to a day when they don't have to take interferon and ribavirin," said Cotler. "But as we are learning with this study, if we are going to need four different direct drugs, it is going to be awhile before we get there. Now at least we know where the goal line is."

Dahari suggests that future treatment that includes the standard treatment and direct antivirals, such as telaprevir or boceprevir, will be tailored to each patient and that using direct antivirals may also shorten the duration of treatment.

The research was funded by the U.S. Department of Energy, the National Institutes of Health, and the UIC Walter Payton Liver Center Guild. Co-authors on the study include Libin Rong, Ruy Ribeiro, and Alan Perelson from Oakland University and Los Alamos National Laboratory.


Story Source:

The above story is based on materials provided by University of Illinois at Chicago. Note: Materials may be edited for content and length.


Journal Reference:

  1. L. Rong, H. Dahari, R. M. Ribeiro, A. S. Perelson. Rapid Emergence of Protease Inhibitor Resistance in Hepatitis C Virus. Science Translational Medicine, 2010; 2 (30): 30ra32 DOI: 10.1126/scitranslmed.3000544

Cite This Page:

University of Illinois at Chicago. "Combination of direct antivirals may be key to curing hepatitis C." ScienceDaily. ScienceDaily, 12 May 2010. <www.sciencedaily.com/releases/2010/05/100505143124.htm>.
University of Illinois at Chicago. (2010, May 12). Combination of direct antivirals may be key to curing hepatitis C. ScienceDaily. Retrieved October 2, 2014 from www.sciencedaily.com/releases/2010/05/100505143124.htm
University of Illinois at Chicago. "Combination of direct antivirals may be key to curing hepatitis C." ScienceDaily. www.sciencedaily.com/releases/2010/05/100505143124.htm (accessed October 2, 2014).

Share This



More Health & Medicine News

Thursday, October 2, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Pregnancy Spacing Could Have Big Impact On Autism Risks

Pregnancy Spacing Could Have Big Impact On Autism Risks

Newsy (Oct. 1, 2014) A new study says children born less than one year and more than five years after a sibling can have an increased risk for autism. Video provided by Newsy
Powered by NewsLook.com
Robotic Hair Restoration

Robotic Hair Restoration

Ivanhoe (Oct. 1, 2014) A new robotic procedure is changing the way we transplant hair. The ARTAS robot leaves no linear scarring and provides more natural results. Video provided by Ivanhoe
Powered by NewsLook.com
Insertable Cardiac Monitor

Insertable Cardiac Monitor

Ivanhoe (Oct. 1, 2014) A heart monitor the size of a paperclip that can save your life. The “Reveal Linq” allows a doctor to monitor patients with A-Fib on a continuous basis for up to 3 years! Video provided by Ivanhoe
Powered by NewsLook.com
Attacking Superbugs

Attacking Superbugs

Ivanhoe (Oct. 1, 2014) Two weapons hospitals can use to attack superbugs. Scientists in Ireland created a new gel resistant to superbugs, and a robot that can disinfect a room in minutes. Video provided by Ivanhoe
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Health & Medicine

Mind & Brain

Living & Well

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins