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The BCSC-1 locus at chromosome 11q23-q24 is a candidate tumor suppressor gene.


ABSTRACT: Frequent allelic loss at human chromosome 11q23-q24 occurs in a wide variety of cancers, suggesting that this region may harbor a tumor suppressor gene. By constructing a physical map of the LOH11CR2 minimal region of loss on 11q23-q24 associated with lung and breast carcinomas, we were able to clone a hereditary translocation, t(11;12)(q23;q24), in a patient with early-onset breast cancer and family history of cancer. The breakpoint was found within 6 kb of the BCSC-1 candidate tumor suppressor gene located in the LOH11CR2 region whereas additional loss of heterozygosity (LOH) analysis in breast and ovarian tumors, including that of the patient with the t(11;12)(q23;q24), implicated the BCSC-1 locus as the primary target of deletion. Northern analysis of the BCSC-1 mRNA revealed a lack of expression in 33 of 41 (80%) tumor cell lines, and its ectopic expression led to the suppression of colony formation in vitro and tumorigenicity in vivo. These data suggest that BCSC-1 may exert a tumor suppressor activity and is a likely target of the LOH observed on 11q23-q24 in cancer.

SUBMITTER: Martin ES 

PROVIDER: S-EPMC208790 | biostudies-literature | 2003 Sep

REPOSITORIES: biostudies-literature

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The BCSC-1 locus at chromosome 11q23-q24 is a candidate tumor suppressor gene.

Martin Eric S ES   Cesari Rossano R   Pentimalli Francesca F   Yoder Kristine K   Fishel Richard R   Himelstein Andrew L AL   Martin S Eric SE   Godwin Andrew K AK   Negrini Massimo M   Croce Carlo M CM  

Proceedings of the National Academy of Sciences of the United States of America 20030922 20


Frequent allelic loss at human chromosome 11q23-q24 occurs in a wide variety of cancers, suggesting that this region may harbor a tumor suppressor gene. By constructing a physical map of the LOH11CR2 minimal region of loss on 11q23-q24 associated with lung and breast carcinomas, we were able to clone a hereditary translocation, t(11;12)(q23;q24), in a patient with early-onset breast cancer and family history of cancer. The breakpoint was found within 6 kb of the BCSC-1 candidate tumor suppressor  ...[more]

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