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CLINICAL TRIAL
JOURNAL ARTICLE
Hepatitis C virus genotypes and hepatic fibrosis regulate 24-h decline of serum hepatitis C virus RNA during interferon therapy in patients with chronic hepatitis C.
Journal of Gastroenterology and Hepatology 2003 April
BACKGROUND AND AIMS: Recently, hepatitis C virus (HCV) dynamics during interferon (IFN) therapy have been studied in detail. We examined factors that regulate the viral kinetics and the relationship between the viral kinetics and clinical effect of IFN therapy.
METHODS: Eighty-eight patients with chronic hepatitis C entered this study. All patients had been treated with 3 MU of IFN-beta twice a day for the first 2-4 weeks, then IFN-alpha for the next 20-22 weeks (three injections per week). The levels of serum HCV RNA were determined by Amplicor HCV Monitor version 1.0, before and 24 h after the first injection of IFN; then the decline of HCV was calculated. Liver inflammation and fibrosis were scored as 0 (none), 1 (mild), 2 (moderate) or 3 (severe) using biopsy specimens.
RESULTS: The decline of serum HCV RNA was 1.42 +/- 0.65 log copies/mL in genotype 1b and 1.83 +/- 0.72 in genotype 2a or 2b (P < 0.01). By a logistic regression model, genotype (1b, 2a or 2b) and hepatic fibrosis (0 or 1, 2 or 3) associated with 24-h decline of serum HCV RNA, independently. As the predictor of IFN therapy, the decline of serum HCV RNA and serum HCV RNA levels before IFN therapy were the independent significant factors (P < 0.001).
CONCLUSIONS: The decline of serum HCV RNA during the first 24 h of IFN therapy was regulated by genotypes and hepatic fibrosis. The decline of serum HCV RNA and initial HCV load were independent factors that can be the predictor of the subsequent sustained viral response to IFN therapy.
METHODS: Eighty-eight patients with chronic hepatitis C entered this study. All patients had been treated with 3 MU of IFN-beta twice a day for the first 2-4 weeks, then IFN-alpha for the next 20-22 weeks (three injections per week). The levels of serum HCV RNA were determined by Amplicor HCV Monitor version 1.0, before and 24 h after the first injection of IFN; then the decline of HCV was calculated. Liver inflammation and fibrosis were scored as 0 (none), 1 (mild), 2 (moderate) or 3 (severe) using biopsy specimens.
RESULTS: The decline of serum HCV RNA was 1.42 +/- 0.65 log copies/mL in genotype 1b and 1.83 +/- 0.72 in genotype 2a or 2b (P < 0.01). By a logistic regression model, genotype (1b, 2a or 2b) and hepatic fibrosis (0 or 1, 2 or 3) associated with 24-h decline of serum HCV RNA, independently. As the predictor of IFN therapy, the decline of serum HCV RNA and serum HCV RNA levels before IFN therapy were the independent significant factors (P < 0.001).
CONCLUSIONS: The decline of serum HCV RNA during the first 24 h of IFN therapy was regulated by genotypes and hepatic fibrosis. The decline of serum HCV RNA and initial HCV load were independent factors that can be the predictor of the subsequent sustained viral response to IFN therapy.
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