Abstract: The interplay between Hepatitis C virus (HCV) and immune system, especially T lymphocytes play a major role in the clearance of virus and in development of liver cell injury resulting in replacement of healthy tissue with fibrous scar tissue.
Objectives: To evaluate the association of CD4/CD8 ratio with viral load and genotype of HCV and to evaluate the correlation of CD4/CD8 ratio and CD4 and CD8 cell counts with liver function tests in HCV infected patients.
Methods: Forty patients of Chronic Hepatitis C infection were enrolled for study. Immunophenotyping by flowcytometry for measurement of CD4 and CD8 T cell counts was used and the percentages of cells expressing CD4 and CD8 were estimated per lymphocyte population. HCV viral load quantitative was done by Roche Taqman Method.
Results: The CD4/CD8 ratio was not found to have any significant correlation with HCV viral load. However, it showed a significant difference in the two HCV genotypes, the ratio being higher in genotype 3 than in genotype 1. It showed no significant correlation with liver function tests except serum albumin which had significant positive correlation with CD4/CD8 ratio. The ratio was also found to be significantly decreased in patients with cirrhosis of liver.
Conclusion: Hepatitis C virus genotype but not viral load influences the immune response to HCV infection. The CD4/CD8 ratio significantly decreases in patients with liver cirrhosis than in normal and fatty liver.
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