Carcinogenesis, Vol. 21, No. 11, 2019-2026,
November 2000
© 2000 Oxford University Press
Carcinogenesis |
High frequency allelic loss on chromosome 17p13.3p11.1 in esophageal squamous cell carcinomas from a high incidence area in northern China
Cancer Institute and Hospital, Chinese Academy of Medical Sciences, Beijing 100021, People's Republic of China,
1 National Cancer Institute, NIH, 6006 Executive Boulevard, Room 321, Bethesda, MD 20892-7058, USA,
2 Shanxi Cancer Hospital, Taiyuan, Shanxi 030013, People's Republic of China, and
3 Information Management Service Inc., Silver Spring, MD 20904, USA
Allelic loss on chromosome 17p has been reported frequently in esophageal squamous cell carcinoma (ESCC) and generally encompasses the p53 locus at 17p13.1. However, a good correlation between allelic loss on 17p and mutation of p53 has not been found. This suggests the possibility that unknown tumor suppressor genes near p53 may be involved in the development of ESCC. To evaluate this possibility, we analyzed 30 microsatellite markers covering the entire short arm of chromosome 17 in 56 ESCC patients from a high risk population in northern China, including 34 with a family history of upper gastrointestinal (UGI) cancer and 22 without a family history of any cancer. Cancer lifestyle risk factors and clinical/pathological characteristics were also collected. We found frequent allelic loss (
65%) at 28 of the 30 markers evaluated in these ESCC patients. The highest frequencies of allelic loss (
80%) were found in three smaller regions: deletion region I located at 17p13.3p13.2 (between D17S849 and D17S1828); deletion region II located at 17p13.2p13.1 (between D13S938 and TP53); deletion region III located at 17p13.1p12 (between D17S804 and D17S799). A number of genes have already been identified in these deleted regions, including: OVCA1, OVCA2 and HIC-1 in deletion region I; p53 in deletion region II; ZNF18, ZNF29, ALDH3 and ALDH10 in deletion region III. These results will help us direct future testing of candidate genes and narrow the search region for major new tumor suppressor genes that may play a role in the pathogenesis of ESCC.
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