Corporate Banner
Satellite Banner
Genomics
Scientific Community
 
Become a Member | Sign in
Home>News>This Article
  News
Return

NIH Investigators Discover New Gene that Affects Clearance of Hepatitis C Virus

Published: Monday, January 07, 2013
Last Updated: Monday, January 07, 2013
Bookmark and Share
Scientists have discovered a gene that interferes with the clearance of hepatitis C virus infection.

They also identified an inherited variant within this gene, Interferon Lambda 4 (IFNL4), that predicts how people respond to treatment for hepatitis C infection. The results of this study, by investigators at the National Cancer Institute (NCI), part of the NIH, and their collaborators at NIH and other institutions, were published online in Nature Genetics on Jan. 6, 2013.

Chronic infection with hepatitis C virus is a cause of liver cirrhosis and liver cancer. Up to 80 percent of people who are acutely infected with hepatitis C fail to clear the virus and develop chronic hepatitis C infection, and of these, approximately 5 percent develop liver cancer. Individuals of African ancestry do not respond as well to current treatments of hepatitis C infection compared to patients of European or Asian ancestry.

Previously, results from genome-wide association studies (GWAS) identified common inherited genetic markers that were associated with response to hepatitis C virus treatment and spontaneous clearance of the infection. Those markers are located on chromosome 19 near a known interferon gene, IFNL3. However, molecular investigations into IFNL3 did not explain the GWAS association with spontaneous virus clearance or treatment response. To find the new gene, the investigators used a technology involving RNA sequencing on human liver cells treated to mimic hepatitis C virus infection.

"By using RNA sequencing we looked outside the box to search for something beyond what was already known in this region. We hit the jackpot with the discovery of a new gene. It is possible that other important genes may be discovered using this approach," said co-lead investigator Ludmila Prokunina-Olsson, Ph.D., of the Laboratory of Translational Genomics in NCI’s Division of Cancer Epidemiology and Genetics (DCEG).

The researchers found that the IFNL4 region harbors a variant that is found in two alternative forms. One form, called deltaG, results in a deletion in one of the four bases that comprise DNA. The change creates an alteration known as a frameshift, which produces the IFNL4 protein, while the form without the deletion does not produce IFNL4. By analyzing data from hepatitis C-infected African-Americans and European-Americans participating in clinical studies, the authors found that the presence of the IFNL4 protein is associated with poorer clearance and response to treatment than the form that does not produce IFNL4. The deletion variant is more common in people of African ancestry, which helps partially explain why African-Americans have a lower response to current hepatitis C treatments than patients of Asian and European ancestry.

"Our work fulfills several promises of the genomic era," said NCI's Thomas R. O’Brien, M.D., Infections and Immunoepidemiology Branch, DCEG. "One, a better understanding of biology; two, personalized medicine; and three, new potential treatments. We deliver immediately on the first two. We've identified a new gene that may help us better understand response to viral infection and the new genetic marker may transition to clinical practice because it predicts treatment outcome for African-American patients better than the current genetic test. For the third, the INFL4 protein may be used as a novel therapeutic target for hepatitis C virus infection, and possibly other diseases."

The new gene belongs to what is now a family of four interferon-lambda protein-encoding genes, three of which were discovered more than ten years ago (IFNL1, IFNL2 and IFNL3) The mechanism by which the IFNL 4 protein impairs hepatitis C virus clearance remains unknown. Further studies will explore molecular function of this novel protein in normal and disease conditions.

This study was conducted collaboratively with the National Institute of Diabetes and Digestive and Kidney Diseases at NIH, as well as the U.S. Food and Drug Administration, and a number of universities and research institutions. Funding was provided by NCI grant Z01 CP005782.


Further Information

Join For Free

Access to this exclusive content is for Technology Networks Premium members only.

Join Technology Networks Premium for free access to:

  • Exclusive articles
  • Presentations from international conferences
  • Over 3,000+ scientific posters on ePosters
  • More than 4,500+ scientific videos on LabTube
  • 35 community eNewsletters


Sign In



Forgotten your details? Click Here
If you are not a member you can join here

*Please note: By logging into TechnologyNetworks.com you agree to accept the use of cookies. To find out more about the cookies we use and how to delete them, see our privacy policy.

Related Content

Drug Might Help Treat Sepsis
A DNA enzyme called Top1 plays a key role in turning on genes that cause inflammation in mouse and human cells in response to pathogens. A drug blocking this enzyme rescued mice from lethal inflammatory responses, suggesting a potential treatment for sepsis.
Wednesday, May 18, 2016
NIH Funds New Studies on Ethical, Legal and Social Impact of Genomic Information
Four new grants from the National Institutes of Health will support research on the ethical, legal and social questions raised by advances in genomics research and the increasing availability of genomic information.
Wednesday, May 18, 2016
Researchers Identify Genetic Links to Educational Attainment
Researchers at NIH have suggested that the large genetics analyses may be able to help discover biological pathways as well.
Thursday, May 12, 2016
Submissions Open for the Cancer Moonshot Program
NCI opens online platform to submit ideas about research for Cancer Moonshot.
Tuesday, April 19, 2016
NIH Sequences Genome of a Fungus
Researchers at the Institute have sequenced genome of human, mouse and rat Pneumocystis that cause life-threatening Pneumonia in immunosuppressed hosts.
Tuesday, April 12, 2016
Decoding Ties Between Vascular Disease, Alzheimer’s
NIH consortium uses big data, team science to uncover complex interplay of factors.
Tuesday, March 15, 2016
Researchers Find Link Between Death of Tumor-Support Cells and Cancer Metastasis
Researchers at NIH have found that the lifespan of supportive cells in a tumor may control the spread of cancer.
Tuesday, February 23, 2016
Tick Genome Reveals Secrets of a Successful Bloodsucker
NIH-funded study could lead to new tick control methods.
Tuesday, February 09, 2016
Genomic Signature Shared by Five Types of Cancer
National Institutes of Health researchers have identified a striking signature in tumor DNA that occurs in five different types of cancer.
Monday, February 08, 2016
Cancer Drug Target Visualized at Atomic Resolution
New study using cryo-electron microscopy shows how potential drugs could inhibit cancer.
Thursday, February 04, 2016
Genome-Wide Study Yields Markers of Lithium Response
An international consortium of scientists has identified a stretch of chromosome that is associated with responsiveness to the mood-stabilizing medication lithium among patients with bipolar disorder.
Monday, February 01, 2016
Schizophrenia’s Strongest Known Genetic Risk Deconstructed
Suspect gene may trigger runaway synaptic pruning during adolescence – NIH-funded study.
Thursday, January 28, 2016
NIH Genome Sequencing Program Targets the Genomic Bases of Common, Rare Disease
The National Institutes of Health will fund a set of genome sequencing and analysis centers whose research will focus on understanding the genomic bases of common and rare human diseases.
Friday, January 15, 2016
Three Glaucoma-Related Genes Discovered
NIH-funded genetics analysis of glaucoma is largest to date.
Tuesday, January 12, 2016
International Study Reveals New Genetic Clues to AMD
NIH-funded research provides framework for future studies of AMD biology, therapy.
Tuesday, December 22, 2015
Scientific News
Scientists Find Evidence That Cancer Can Arise Changes
Researchers at Rockefeller University have found a mutation that affects the proteins that package DNA without changing the DNA itself can cause a rare form of cancer.
Modified Microalgae Converts Sunlight into Valuable Medicine
A special type of microalgae can soon produce valuable chemicals such as cancer treatment drugs and much more just by harnessing energy from the sun.
Breakthrough Approach to Breast Cancer Treatment
Scripps scientists have designed a drug candidate that decreases growth of breast cancer cells.
Loss Of Y Chromosome Increases Risk Of Alzheimer’s
Men with blood cells that do not carry the Y chromosome are at greater risk of being diagnosed with Alzheimer’s disease. This is in addition to an increased risk of death from other causes, including many cancers. These new findings by researchers at Uppsala University could lead to a simple test to identify those at risk of developing Alzheimer’s disease.
A Guide to CRISPR Gene Activation
A comparison of synthetic gene-activating Cas9 proteins can help guide research and development of therapeutic approaches.
Gene That Lowers Heart Attack Risk Identified
Individuals with a rare twelve-letter deletion from a gene on chromosome 17 have significantly reduced non-HDL cholesterol levels and a 35% lower than average risk of heart disease.
Testing Non-Breast/Ovarian Cancer Genes
Researchers have found that expanding gene panel beyond breast/ovarian cancer genes in these patients does not add any clinical benefit. Instead, testing has produced more questions than answers.
Myeloid-Derived Suppressor Cells Play Role in Tumor Growth
Researchers at Baylor College of Medicine have reported a new mechanism that helps cancer cells engage myeloid-derived suppressor cells.
Cancer Cells Coordinate to Form Roving Clusters
Rice University scientists identify ‘smoking gun’ in metastasis of hybrid cells.
Genes For Nose Shape Found
Genes that drive the shape of human noses have been identified by a UCL-led study.
Skyscraper Banner

SELECTBIO Market Reports
Go to LabTube
Go to eposters
 
Access to the latest scientific news
Exclusive articles
Upload and share your posters on ePosters
Latest presentations and webinars
View a library of 1,800+ scientific and medical posters
3,000+ scientific and medical posters
A library of 2,500+ scientific videos on LabTube
4,500+ scientific videos
Close
Premium CrownJOIN TECHNOLOGY NETWORKS PREMIUM FOR FREE!