Background: Liver fibrosis is accelerated in patients co-infected with human immunodeficiency virus and hepatitis C viruses.
Aims: We investigated the correlation between liver fibrosis, immune activation and microbial translocation.
Methods: This cross-sectional study included patients with hepatitis C virus (HCV) and human immunodeficiency virus (HIV) mono-infections, HIV/HCV co-infection, and healthy controls (20 subjects/group). Peripheral blood was analysed to determine the levels of Forkhead box 3 (Foxp3) T cells, TGF-β1, CD14 (soluble and surface isoforms), IL-17 and bacterial translocation products. These measurements were correlated to the severity of liver fibrosis, measured with the FIB-4 score and transient elastography.
Results: Foxp3T cell levels were significantly elevated in HIV mono-infected and co-infected groups (p<0.0005). FIB-4 and liver stiffness values inversely correlated with TGF-β1 (p=0.0155 and p=0.0498). Bacterial DNA differed significantly in the HIV-positive compared to the other groups: HIV/HCV co-infected subjects had significantly higher serum levels of bacterial translocation products, CD14, and IL-17 levels (p<0.001).
Conclusions: Fibrosis stage in HIV/HCV co-infection may be influenced by immune activation due either by viral infections or to bacterial translocation.
Keywords: Bacterial translocation; HIV immunity; HIV/HCV co-infection; Liver fibrosis.
Copyright © 2014 Editrice Gastroenterologica Italiana S.r.l. Published by Elsevier Ltd. All rights reserved.