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Identification of a 1-Mb common region at 16q24.1–24.2 deleted in hepatocellular carcinoma

✍ Scribed by Koichi Bando; Hisaki Nagai; Satoshi Matsumoto; Masaaki Koyama; Naoki Kawamura; Takashi Tajiri; Masahiko Onda; Mitsuru Emi

Publisher
John Wiley and Sons
Year
2000
Tongue
English
Weight
154 KB
Volume
28
Category
Article
ISSN
1045-2257

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✦ Synopsis

To identify the location of one or more putative tumor suppressor genes that may be involved in hepatocellular carcinoma (HCC), we examined 96 such tumors for their patterns of allelic loss at 21 microsatellite marker loci distributed along chromosome arm 16q. Allelic loss at one or more loci was observed in 58 (60%) of these tumors. Detailed deletion mapping identified a distinct commonly deleted region located within an interval flanked by D16S534 and D16S3091 at 16q24.1-24.2. By constructing a physical map consisting of a YAC contig across the region, the extent of the deleted region was determined to be less than 1 Mb. Among the tumors for which clinical data were available, allelic loss at 16q24.1-24.2 was more frequent in tumors arising from liver cirrhosis compared to HCCs arising from chronic hepatitis (30/42, 71%, vs. 13/33, 39%; P ϭ 0.0054). Additionally, allelic loss at 16q24.1-24.2 was frequently observed in small tumors and early-stage tumors as well as in tumors of more advanced phenotype.

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