Persistent liver inflammation in chronic hepatitis C patients with advanced fibrosis after direct-acting antivirals induced sustained virological response.

BACKGROUND: Direct-acting antivirals (DAA) improve sustained virological response (SVR) rates with normalization of liver enzymes in patients with hepatitis C. However, liver inflammation may persist despite virus eradication. We aimed to investigate the rate and risk factors for persistent elevated aminotransferase levels in patients with advanced fibrosis after DAA-induced SVR. METHODS: From January 2017 to April 2018, chronic hepatitis C patients with advanced fibrosis and SVR after DAA treatment at the Taipei Veterans General Hospital were prospectively enrolled. Persistent liver inflammation after SVR was defined as an increase in levels of alanine aminotransferase (ALT) (>40 U/L) at SVR12. RESULTS: A total of 461 patients were included (57.9% females, mean age 64 years, 69.6% genotype 1b, 46.4% cirrhosis). At SVR12, there was a decline in ALT levels (90.5 ± 80.8 U/L to 25.3 ± 26.5 U/L) from baseline levels. Persistent liver inflammation at SVR12 was detected in 45 patients (9.8%). The presence of cirrhosis, markers of impaired liver functions, history of interferon-based therapy, steatosis, and elevated ALT levels at baseline was associated with persistent liver inflammation after SVR12. Results of multivariate analysis indicated that levels of baseline serum total bilirubin (odds ratio [OR]: 2.605, 95% CI: 1.158-5.858), international normalized ratio (OR: 14.389, 95% CI: 1.754-118.049), ALT (OR: 1.006, 95% CI: 1.003-1.009), and the presence of steatosis (OR: 3.635, 95% CI: 1.716-7.698) were independent predictors of persistent liver inflammation at SVR12. CONCLUSION: Persistent liver inflammation is not uncommon in chronic hepatitis C patients with advanced fibrosis after DAA-induced SVR. It is associated with impaired baseline liver function and steatosis. Long-term follow-up is required to assess the implication of liver inflammation on disease progression.