Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Hepatitis C may increase deaths from both liver-related and other diseases

18.07.2012
In a long-term study of people infected with the hepatitis C virus (HCV), researchers found increased deaths from both liver-related and non-liver related diseases in patients with active infections who had not cleared their infection.

The study, published in the Journal of Infectious Diseases and available online, found increased mortality in patients with chronic HCV infection—that is, with detectable levels of HCV genetic material, or RNA, in their blood—suggesting that chronic HCV infections, even in people who have no symptoms, can lead to increased mortality from liver disease or a variety of other causes.

The findings highlight the importance of people getting tested for HCV antibodies and for active HCV infection—and of evaluating patients for antiviral treatment when they are found to have an active HCV infection, even when they feel well.

HCV infects more than 170 million people globally and has been shown to cause such liver diseases as cirrhosis and hepatocellular carcinoma. Many infected patients have no symptoms and are not aware of infection until after irreversible liver disease has occurred. In addition, several diseases not related to the liver have been linked to HCV. However, nearly two-thirds of patients can be cured of their HCV infection with currently available antiviral therapy.

Chien-Jen Chen, ScD, and researchers from the Genomic Research Center in Taipei, Taiwan, enrolled more than 23,000 adults in Taiwan in their study and followed them from 1991 to 2008. Blood samples were collected at study entry and at follow-up health examinations. Researchers found increased mortality from liver- and non-liver-related diseases—including cancers of the esophagus, prostate, and thyroid, as well as circulatory and renal diseases—among those infected with HCV. Mortality was higher in HCV-infected participants with detectable serum levels of HCV RNA, indicating they had active infections; subjects with previous infections who only had HCV antibodies, but not HCV RNA, in their blood did not have increased mortality on follow-up.

According to Dr. Chen, "The findings implied that the serum HCV RNA level is an important marker for clinical decisions in the management of HCV-infected patients." Dr. Chen suggested that HCV-infected patients may benefit from treatment with antiviral and immunomodulating agents to promote viral clearance.

The investigators concluded that their findings have significant implications for clinical practice and public health—namely, that individuals seropositive for HCV RNA should be followed intensively and urged to be evaluated for antiviral therapy. In addition, they noted, testing to determine serum HCV RNA level by a sensitive assay is essential for clinical management of HCV-infected patients.

Dr. Chen and his colleagues cautioned that some non-liver-related diseases are too rare to accurately determine their risk in connection with HCV infection. They suggested that a collaborative study with a large sample size would be needed in order to further investigate the full spectrum of diseases associated with HCV.

In an accompanying editorial, Kenrad E. Nelson, MD, of Johns Hopkins University in Baltimore, noted that overall mortality was significantly increased from liver-related and other causes compared to uninfected patients from the same communities in the study. The findings indicate that, although some who are infected with HCV can cure their infection without treatment, most people who are infected and who have no symptoms develop chronic infections and are at increased risk of death from HCV, Dr. Nelson said.

Many patients with HCV infection go undiagnosed, and among those whose infection is detected, "few are medically evaluated and effectively treated," Dr. Nelson added. Although treatment for HCV infection is improving dramatically, he noted, a significant reduction in HCV-related mortality will require that screening measures are greatly expanded.

Fast Facts:
Overall mortality in patients infected with hepatitis C virus (HCV) was significantly increased from both liver-related and other diseases compared to uninfected patients from the same communities.
Compared to people who had never been infected with HCV, mortality was higher in HCV-infected patients with detectable levels of HCV RNA in their blood on follow-up, but not in patients with inactive infections—those who were positive for HCV antibodies but whose blood was free of HCV RNA.

Diseases not related to the liver that were observed in this study included cancers of the esophagus, prostate, and thyroid, and circulatory and renal diseases.

Most people with chronic HCV infection don't know they are infected because the infection is often without symptoms. However, chronic HCV can be curable with treatment, so people should be screened and considered for treatment if they have chronic HCV infection.

Editor's note: This study was supported by research grants from the Taiwan Department of Health; Bristol-Myers Squibb Co.; Academia Sinica in Taipei, Taiwan; and the National Health Research Institutes in Chunan, Taiwan.

The study and the accompanying editorial are available online. They are embargoed until 12:01 a.m. EDT on Wednesday, July 18, 2012:

Founded in 1904, The Journal of Infectious Diseases is the premier publication in the Western Hemisphere for original research on the pathogenesis, diagnosis, and treatment of infectious diseases; on the microbes that cause them; and on disorders of host immune mechanisms. Articles in JID include research results from microbiology, immunology, epidemiology, and related disciplines. It is published under the auspices of the Infectious Diseases Society of America (IDSA). Based in Arlington, Va., IDSA is a professional society representing nearly 10,000 physicians and scientists who specialize in infectious diseases.

Sky Opila | EurekAlert!
Further information:
http://www.pcipr.com
http://www.idsociety.org

More articles from Health and Medicine:

nachricht Collagen nanofibrils in mammalian tissues get stronger with exercise
14.12.2018 | University of Illinois College of Engineering

nachricht New discoveries predict ability to forecast dementia from single molecule
12.12.2018 | UT Southwestern Medical Center

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Data storage using individual molecules

Researchers from the University of Basel have reported a new method that allows the physical state of just a few atoms or molecules within a network to be controlled. It is based on the spontaneous self-organization of molecules into extensive networks with pores about one nanometer in size. In the journal ‘small’, the physicists reported on their investigations, which could be of particular importance for the development of new storage devices.

Around the world, researchers are attempting to shrink data storage devices to achieve as large a storage capacity in as small a space as possible. In almost...

Im Focus: Data use draining your battery? Tiny device to speed up memory while also saving power

The more objects we make "smart," from watches to entire buildings, the greater the need for these devices to store and retrieve massive amounts of data quickly without consuming too much power.

Millions of new memory cells could be part of a computer chip and provide that speed and energy savings, thanks to the discovery of a previously unobserved...

Im Focus: An energy-efficient way to stay warm: Sew high-tech heating patches to your clothes

Personal patches could reduce energy waste in buildings, Rutgers-led study says

What if, instead of turning up the thermostat, you could warm up with high-tech, flexible patches sewn into your clothes - while significantly reducing your...

Im Focus: Lethal combination: Drug cocktail turns off the juice to cancer cells

A widely used diabetes medication combined with an antihypertensive drug specifically inhibits tumor growth – this was discovered by researchers from the University of Basel’s Biozentrum two years ago. In a follow-up study, recently published in “Cell Reports”, the scientists report that this drug cocktail induces cancer cell death by switching off their energy supply.

The widely used anti-diabetes drug metformin not only reduces blood sugar but also has an anti-cancer effect. However, the metformin dose commonly used in the...

Im Focus: New Foldable Drone Flies through Narrow Holes in Rescue Missions

A research team from the University of Zurich has developed a new drone that can retract its propeller arms in flight and make itself small to fit through narrow gaps and holes. This is particularly useful when searching for victims of natural disasters.

Inspecting a damaged building after an earthquake or during a fire is exactly the kind of job that human rescuers would like drones to do for them. A flying...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

ICTM Conference 2019: Digitization emerges as an engineering trend for turbomachinery construction

12.12.2018 | Event News

New Plastics Economy Investor Forum - Meeting Point for Innovations

10.12.2018 | Event News

EGU 2019 meeting: Media registration now open

06.12.2018 | Event News

 
Latest News

Pressure tuned magnetism paves the way for novel electronic devices

18.12.2018 | Materials Sciences

New type of low-energy nanolaser that shines in all directions

18.12.2018 | Physics and Astronomy

NASA research reveals Saturn is losing its rings at 'worst-case-scenario' rate

18.12.2018 | Physics and Astronomy

VideoLinks
Science & Research
Overview of more VideoLinks >>>