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Reuters Health Information (2010-07-09): Extended treatment of HCV type 1 beneficial in slow responders

Clinical

Extended treatment of HCV type 1 beneficial in slow responders

Last Updated: 2010-07-09 16:00:14 -0400 (Reuters Health)

NEW YORK (Reuters Health) - Patients infected with hepatitis C virus (HCV) type 1 who haven't responded to pegylated interferon-alfa and ribavirin after 12 weeks can benefit from continuing treatment for up to 72 weeks, a meta-analysis from Germany shows.

In an article published online June 30 in Clinical Gastroenterology and Hepatology, Dr. Eva Herrmann and colleagues at J.W. Goethe University in Frankfurt note there's conflicting evidence about the value of extending treatment beyond the standard 48 weeks for patients with HCV-1, who often have a slow response to therapy.

"Therefore," they explain, "we performed a systematic review and meta-analysis of randomized controlled clinical trials which compared extended duration of treatment with pegylated interferon-alfa and ribavirin with standard treatment in treatment-naive HCV genotype 1 slow responders."

The team identified six appropriate trials that met inclusion criteria, which included the requirement that the authors report the number of patients who still had detectable HCV RNA at 12 weeks. Overall, the trials involved 669 patients.

"The overall SVR (sustained virologic response) rates of these slow responders were 19.4% and 35.6% after standard treatment versus extended treatment, respectively (p=0.0072)," the team reports. Further analysis showed that extended therapy produced a 14.7% higher likelihood of achieving a sustained virologic response compared with standard treatment.

"The frequency of viral relapse appears to be associated with the time of being HCV RNA negative during treatment and the reduced frequency of relapse is a likely explanation of improved SVR rates after extended treatment," the investigators surmise.

Noting that numerous side effects can occur with interferon-ribavirin treatment, Dr. Herrmann and colleagues looked at safety and tolerance during extended therapy. While there was no significant increase in serious side effects with extended treatment (8%) versus standard treatment (7%), more patients did voluntarily discontinue treatment (7.0% vs. 2.3%).

The researchers note that new treatments targeting HCV specifically are being developed and that some patients might be safely watched until these new antivirals become available. However, treatment is urgent in patients with advanced liver fibrosis, so "optimization of combination therapy with pegylated interferon-alfa and ribavirin is still of high relevance."

SOURCE: http://link.reuters.com/rap76m

Clin Gastroenterol Hepatol 2010.

 
 
 
 

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