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New target region of allelic loss in hepatocellular carcinomas within a 1-cM interval on chromosome 6q23.

Abstract：

BACKGROUND/AIMS:Frequent allelic losses on the long arm of chromosome 16 in several types of human cancers have suggested that 16q harbors one or more genes that are important for suppressing tumorigenesis in the tissues in question. METHODS:To identify the locations of putative tumor suppressor genes involved in hepatocellular carcinoma, we examined 96 primary hepatocellular carcinomas for their patterns of allelic loss at 18 microsatellite marker loci distributed along this chromosome arm. RESULTS:Allelic loss at one or more loci was observed in 48 (50%) of these tumors. The highest frequency of loss of heterozygosity (42%) was observed with marker D6S311 on chromosome 6q23. Through detailed deletion mapping of tumors having partial or interstitial deletions, we identified two commonly deleted regions at 6q23 and at 6q26-27. CONCLUSIONS:The common region at 6q23 lay within a 1-cM interval, flanked by D6S977 and D6S311. The previously documented deletion region that includes the M6P/IGF2R locus was confined to a 20-cM region at band 6q26-27 in our panel of tumors. The location we defined at 6q23 for a putative suppressor of hepatocellular carcinoma has not been reported before.

journal_name

J Hepatol

journal_title

Journal of hepatology

authors

Koyama M,Nagai H,Bando K,Matsumoto S,Tajiri T,Onda M,Ito M,Moriyama Y,Emi M

doi

10.1016/s0168-8278(00)80163-4

subject

Has Abstract

pub_date

2000-07-01 00:00:00

pages

85-90

issue

1

eissn

0168-8278

issn

1600-0641

pii

S0168-8278(00)80163-4

journal_volume

33

pub_type

杂志文章

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