Hepatitis activity index is a key factor in determining the natural history of chronic hepatitis C

Area of Science:

• Hepatology
• Virology
• Pathology

Background:

• Chronic hepatitis C virus (HCV) infection is a significant global health concern.
• Understanding the natural history and spontaneous progression of HCV is crucial for patient management.
• Histopathologic assessment of liver biopsies is a standard method for evaluating liver disease severity.

Purpose of the Study:

• To analyze the spontaneous histopathologic progression of chronic hepatitis C in untreated patients.
• To identify factors associated with disease worsening, particularly fibrosis progression.
• To evaluate the utility of necroinflammatory activity as a predictor for fibrosis progression.

Main Methods:

• Analysis of sequential liver biopsies using Metavir and Knodell scoring systems in untreated HCV patients.
• Assessment of changes in necroinflammatory activity and fibrosis over time.
• Multivariate analysis to determine predictors of fibrosis progression.

Main Results:

• Similar results were observed using both Metavir and Knodell scores.
• At baseline, most patients had low activity (78.9%) and fibrosis (82.9%).
• Disease activity increased in 18.5% of patients, with higher rates in genotype 1 infections.
• Fibrosis progression was significantly associated with higher initial necroinflammatory activity (P <.01).
• High activity score was a significant predictor of fibrosis progression (RR, 25.5; P =.004).

Conclusions:

• Spontaneous worsening of chronic hepatitis C occurs in a minority of patients (around 20%).
• Necroinflammatory activity is a critical factor driving liver fibrosis progression.
• Histopathologic activity should be considered a major clue in therapeutic decision-making for chronic hepatitis C.