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• W1853755596 startingPage "201" @default.
• W1853755596 abstract "Objectives Hepatitis B virus (HBV) with a stop mutation at precore codon 28 (TGG→TAG, tryptophan→stop) was investigated to clarify if such a mutant virus might play a role in hepatocarcinogenesis. Methods A total of 73 patients with HBV-related hepatocellular carcinoma were included in this study. Polymerase chain reaction (PCR) was performed in DNA samples extracted from 73 sera to amplify a HBV-DNA segment involving the precore and proximal core regions, and sequences of PCR products were analyzed to see the presence of the mutations at precore codon 28 by a direct sequencing method. Results HBV-DNA was detectable in 64 (88%) patients by PCR. The stop mutation at precore codon 28 was identified in 50 of 58 PCR products (86%), in which direct sequencing was performed. Among patients with this mutant HBV, 21/50 (42%) patients were co-infected with wild-type HBV. The mutant virus was found in 23/28 (82%) patients with hepatitis B e antigen (HBeAg) and 27/30 (90%) patients without HBeAg. The mutant HBV alone was found in 10/28 (36%) patients with HBeAg and 19/30 (63%) without HBeAg. Among those patients on whom laparoscopy was performed, 22/24 (92%) with the precore codon 28 stop mutant alone had cirrhosis, compared to 12/19 (63%) co-infected by both the mutant and the wiId-type (p<0.05). The association of this mutant virus with both the presence and absence of HBeAg, and its association with cirrhosis when there is no co-infection with wild-type HBV, suggests an evolving pattern of liver pathology. Conclusion The high prevalence of a stop mutation at precore codon 28 in these patients with hepatocellular carcinoma suggests that HBV with this mutation may contribute to the development of hepatocellular carcinoma." @default.
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• W1853755596 creator A5066528087 @default.
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• W1853755596 date "1997-07-31" @default.
• W1853755596 modified "2023-09-26" @default.
• W1853755596 title "Precore Codon 28 Stop Mutation in Hepatitis B Virus from Patients with Hepatocellular Carcinoma" @default.
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• W1853755596 doi "https://doi.org/10.3904/kjim.1997.12.2.201" @default.
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