Persistently normal alanine aminotransferase levels in HIV/HCV-coinfected patients: the role of steatosis.

OBJECTIVE: The frequency and significance of, and liver biopsy findings associated with, a persistently normal alanine aminotransferase (ALT) level in HIV/hepatitis C virus (HCV)-coinfected patients are poorly characterized. We analysed factors associated with persistently normal ALT levels, defined as at least three consecutive normal ALT values over a 6-month period, in a group of 381 HIV/HCV-coinfected patients. METHODS: Patients were categorized into two groups according to ALT values: group 1, patients with persistently normal ALT levels; and group 2, patients with elevated ALT values. Possible interactions with host factors, HIV and HCV viral factors, antiretroviral treatment and histological features were examined. RESULTS: Thirty-six patients (9.4%) had persistently normal ALT levels. None of the 36 patients had cirrhosis. Seven patients (19.4%) had a METAVIR fibrosis score of F3. In multivariate analysis, a lower mean METAVIR inflammation score [odds ratio (OR) 0.50, 95% confidence interval (CI) 0.28-0.89; P=0.017], the absence of steatosis (OR 0.43, 95% CI 0.20-0.90; P=0.026) and HCV genotype 4 infection (OR 2.81, 95% CI 1.15-6.68; P=0.023) were associated with persistently normal ALT levels. CONCLUSION: The slower progression of chronic hepatitis in patients with persistently normal ALT levels could be related, in part, to a lower frequency of steatosis.