P21WAF1/CIP1 messenger RNA expression in hepatitis B, C virus-infected human hepatocellular carcinoma tissues.

Abstract:

BACKGROUND:The primary objective of this study was to clarify the significance of p21WAF1/CIP1(p21) gene expression in the tumorgenicity of hepatitis B virus (HBV) and hepatitis C virus (HCV) infected human hepatocelluar carcinoma (HCC). METHODS:The authors performed Northern blot hybridization to compare the p21 messenger (m) RNA expression levels among 16 HCC cases. They detected tissue HBVx mRNA (Northern blot) and plus- and minus-strand HCV RNA (reverse transcription-polymerase chain reaction) in liver tissues. They also measured alanine transaminase (ALT) levels and indocyanine green retention rate at 15 minutes (ICG-R15). RESULTS:The p21 transcripts of tumor (T) tissues could be identified with lower intensity than nontumor (N) tissues in all 4 HBVx mRNA(+) cases, 8 of 10 HCV RNA(+) cases, and 1 of 3 B(-), C(-) cases (1 case was positive for both viruses). p21 mRNA expression levels of N tissues were significantly higher in HCV RNA(+) cases than in HBVx mRNA(+) cases. p21 mRNA expression levels of N tissues were significantly correlated with serum ALT levels. CONCLUSIONS:In HCV hepatitis, p21 mRNA expression is up-regulated to control cell cycle under regeneration stress. Once the liver develops HCC, the p21 mRNA expression decreases to prominently low levels. The up-regulated p21 expression may play a role as a guard to prevent hepatocytes from tumorgenicity in HCV hepatitis.

journal_name

Cancer

journal_title

Cancer

authors

Kobayashi S,Matsushita K,Saigo K,Urashima T,Asano T,Hayashi H,Ochiai T

doi

10.1002/1097-0142(20010601)91:11<2096::aid-cncr123

subject

Has Abstract

pub_date

2001-06-01 00:00:00

pages

2096-103

issue

11

eissn

0008-543X

issn

1097-0142

pii

10.1002/1097-0142(20010601)91:11<2096::AID-CNCR123

journal_volume

91

pub_type

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