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Effect of cytokine gene polymorphism on histological activity index, viral load and response to treatment in patients with chronic hepatitis C genotype 3

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World Journal of Gastroenterology 2005年第42期11卷 6656-6661页

作者： Zaigham Abbas Tariq Moatter Akber Hussainy Wasim Jafri Department of Medicine The Aga Khan University Hospital Karachi Pakistan Department of Pathology The Aga Khan University Hospital Karachi Pakistan

AIM： To investigate the association between cytokine gene polymorphism and disease status in chronic hepatitis C genotype 3 by liver biopsy, ALl, HCV RNA levels and response to treatment. METHODS： Patients with chronic hepatitis C genotype 3 were analyzed for single nucleotide polymorphisms of interleukin （IL）-10, IL-1 beta, interferon-gamma （IFN-y）, tumor necrosis factor-alpha （TNF-y） and transforming growth factor-beta （TGF-β） by polymerase chain reaction using sequence-specific oligonucleotide primers. Liver biopsies were assessed by modified histological activity index （HAI） scoring system using a scale of 0-18 for grading the necro-inflammatory activity and 0-6 for staging the fibrosis. HCV RNA levels were determined by bDNA assay. The patients were treated with interferon alpha and ribavirin for 6 mo. Sustained virological response was assessed 6 mo after the completion of the treatment. RESULTS： Out of the 40 patients analyzed, 26 were males. Mean age was 40.5±12.5 years （range 18- 65 years）. The frequencies of different dimorphic polymorphisms based on single nucleotide substitution were as follows： IL-10-1082 G/A 85%, A/A 12.5%, G/ G 2.5%; IL-10-819 A/C 87.5%, C/C 10%, A/A 2.5%; IL-10-592 C/A 72.5%, C/C 27.5%; IL-1 C 90%, U 10%; IFN-874 T/A 50%, T/T 27.5%, A/A 22.5%; TNF-308 A/G 95%, G/G 5%; TGF-10 T/C 52.5%, C/C 35%, T/T 12.5%. The mean grades of necroinflammatory activity of different genotypes of IL-10 at promoter site -1082 were A/A = 3.6, A/G = 5.0, and G/G = 10.0 and the difference was significant （P = 0.029）. The difference in the stage of disease at a scale of 0-6 was A/A 0.8, A/G 2.3, and G/G 4.0 （P = 0.079）. The difference in the HAI seemed to be related to the presence of allele -*** IL-10 -819 genotypes, mean scores of fibrosis were A/A = 6.0, A/C = 2.2, and C/C = 1.0 （P = 0.020） though the inflammatory activity was not much different. No significant differences in HAI were noted among polymorphisms of other cytokines. Moreover, ALT and HC

关键词： Interleukin Interferon gamma tumornecrosis factor alpha Transforming growth factor Cytokines Gene polymorphism Hepatitis C Alanineaminotransferase Liver biopsy

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