Loss of the gene encoding mannose 6-phosphate/insulin-like growth factor II receptor is an early event in liver carcinogenesis.


Journal Article

This report shows that loss of heterozygosity at the mannose 6-phosphate/insulin-like growth factor II receptor (M6P/IGF2R) locus occurred in 5/8 (63%) dysplastic liver lesions and 11/18 (61%) hepatocellular carcinomas (HCCs) associated with the high risk factors of hepatitis virus infection and liver cirrhosis. Mutations in the remaining allele were detected in 6/11 (55%) HCCs, including deletions in a polydeoxyguanosine region known to be a target of microsatellite instability. M6P/IGF2R allele loss was also found in cirrhotic tissue of clonal origin adjacent to these dysplastic lesions and HCCs, demonstrating that M6P/IGF2R inactivation occurs early in liver carcinogenesis. In conclusion, HCCs frequently develop from clonal expansions of phenotypically normal, M6P/IGF2R-mutated hepatocytes, providing further support for the idea that M6P/IGF2R functions as a liver tumor-suppressor gene.

Full Text

Cited Authors

  • Yamada, T; De Souza, AT; Finkelstein, S; Jirtle, RL

Published Date

  • September 16, 1997

Published In

Volume / Issue

  • 94 / 19

Start / End Page

  • 10351 - 10355

PubMed ID

  • 9294214

Pubmed Central ID

  • 9294214

International Standard Serial Number (ISSN)

  • 0027-8424

Digital Object Identifier (DOI)

  • 10.1073/pnas.94.19.10351


  • eng

Conference Location

  • United States