[Relationship between viral genotype and specific and nonspecific CTL of patients with cirrhotic hepatitis B and its significance].

ABSTRACT

OBJECTIVE: To explore relationship between different HBV genotypes and peripheral blood HBV specific and nonspecific CTL of patients with cirrhotic hepatitis B and its significance. METHODS: HBV genotypes were tested in 91 patients with cirrhotic hepatitis B, differences of HBV specific and nonspecific CTL between patients infected with genotype B and C were compared and its significance was explored. RESULTS: In 91 cases of cirrhotic hepatitis B, 55 cases (60.44%) belong to genotype C, 35 cases (38.46%) belong to genotype B, 1 case (1.1%) belongs to mixture genotype B and C. In genotype C, 27 cases (49.09%) had positive (HLA)-A2, HBV specific CTL was 0.18% +/- 0.03%. In genotype B, 18 cases (51.43%) had positive HLA-A2, HBV specific CTL was 0.38% +/- 0.04%, higher than that in genotype C, t = 5.01, P < 0.01. Nonspecific CTL genotype C (11.87% +/- 1.50%); genotype B (11.90% +/- 1.51%), t = 0.14, P < 0.05. HBV DNA level genotype C (6.01 +/- 0.81) log10 copy/ml, higher than that in genotype B (5.01 +/- 0.54) log10 copy/ml, t = 5.01, P < 0.01. ALT genotype C (251.13 +/- 131.11) U/L, higher than that in genotype B (121.25 +/- 63.21) U/L, t = 3.61, P < 0.01. TBil (45.61 +/- 15.11) micromol/L, higher than that in genotype B (28.11 +/- 6.25) micromol/L, t = 3.05, P < 0.01. CONCLUSION: Compared with patients infected with genotype B of cirrhotic hepatitis B, HBV specific CTL of patients infected with genotype C was lower, resulting in higher level of HBV DNA and more severe damage of liver function.