title: Effects of the Chemokine Receptor 5 (CCR5)-Delta32 Mutation on Hepatitis C Virus-Specific Immune Responses and Liver Tissue Pathology in HCV Infected Patients.
abstract: BACKGROUND
  The specific antiviral T cells provide CC chemokine receptor 5 (CCR5) for the immune response during the hepatitis C virus (HCV) infection. Heterogenous and/or homozygous 32 base pair deletion in CCR5 gene (CCR5Δ32 bpdel) leads to reduced protein expression.
  
  
  OBJECTIVE
  In the current case control study, we aimed to compare the histopathological findings of liver to the CCR5Δ32 bpdel mutation profiles, expression and some other clinical findings in patients with chronic HCV infection.
  
  
  METHODS
  Multiple Strip Assay reverse hybridisation and Real Time PCR techniques were used to determine the germline CCR5 mutations and immunohistochemical technique was used to evaluate the gene expression in targer tissue biopsies.
  
  
  RESULTS
  Target CCR5 WT/WT, WT/Δ32, and Δ32/Δ32 genotypes were observed in 91.4%, 8.6% and 0.0% for HCV positive patients and 98.3%, 1.7% and 0.0% for control group respectively. The histologic activity index (HAI) was significantly lower (4.0 ± 1.0) in the mutated group than the non-mutated group (5.7 ± 1.0). Decreased fibrosis levels were detected in HCV positive mutated group.
  
  
  CONCLUSIONS
  Results showed that CCR5 polymorphism was more frequent in HCV positive patients than in healthy population in Turkish population. Current results also showed that mutated CCR5 signalling pathway due to CCR5-Delta32 may potentially result in subtle reduction of HCV specifity to the drug responses due to the positive impact on liver inflammation, fibrosis levels and liver destruction in HCV infection.
authors: Department of Gastroenterology, Cumhuriyet University, Sivas, Turkey.
authors: Abdulkerim
authors: A
authors: Yilmaz
authors: Department of Gastroenterology, Cumhuriyet University, Sivas, Turkey.
authors: Hakan
authors: H
authors: Alagozlu
authors: Department of Medical Genetics, Cumhuriyet University, Sivas, Turkey ; Department of Medical Genetics, Canakkale Onsekiz Mart University, Canakkale, Turkey.
authors: Ozturk
authors: O
authors: Ozdemir
authors: Department of Pathology, Cumhuriyet University, Sivas, Turkey.
authors: Sema
authors: S
authors: Arici
keywords: Chemokines; Hepatitis C Virus; Infection