广西肝癌患者乙型肝炎病毒前C区基因的突变

目的 了解乙型肝炎病毒（ＨＢＶ）前Ｃ区基因突变与ＨＢｅＡｇ阴性的原发性肝癌患ＨＢＶ感染的关系。方法 应用套式ＰＣＲ方法对广西１６例原发性肝癌患血清ＨＢＶ ＮＡ前Ｃ区进行扩增,对阳性用Ｓａｎｇｅｒ ＤＮＡ测序法分析。结果 １６例肝癌患中有１４例ＨＢＶ ＤＮＡ阳性,阳性率为８７．５％（１４／１６）。其中１例ＨＢｅＡｇ阳隆,１例虽然ＨＢｅＡｇ为阴性,但其前Ｃ区序列正常;２例为ＨＢＶ野毒株和突变株

Mutation of hepatitis B virus DNA pre-C region in patients with primary hepatocellular carcinoma in Guangxi

OBJECTIVE: To study the association between mutation of hepatitis B virus (HBV) pre-C gene and HBV infection in patients with primary hepatocellular carcinoma (PHC) but negative hepatitis B e antigen (HBeAg) in Guangxi Province, China. METHODS: Nested polymerase chain reaction (nPCR) was used for amplification of HBV DNA Pre C region in sera collected from 16 patients with PHC in Guangxi, and then their HBV DNA nPCR products were sequenced by Sanger method. RESULTS: Sera in fourteen of 16 patients showed positive HBV DNA, with a positive proportion of 87.5% (14/16). One (C23) of them was positive for HBeAg; one (C24) was negative HBeAg, but with normal sequence in his Pre C region; two (C7, C14) were co-infected with HBV wild and mutant strains; and the remainder eight cases (C3, C4, C5, C8, C10, C11, C12, C13) were infected with mutant virus strains, but stop codon at codon 28 was only found in C4, C5 and C12. One case (C8) was co-infected with both HBV stop codon mutant and non-stop codon strains. CONCLUSION: It is uncommon for patients with PHC in Guangxi infected with HBV mutant strain with classical mutation at nt 1 896, which suggests that maybe there exist other types of mutation other than that in pre-C region causing HBV infection without HBeAg.