Abstract |
Alterations of the entire long arm of chromosome 1 are the most consistent cytogenetic abnormalities found in human breast carcinoma. Overexpression of a large number of genes, because of acquisition of additional copies of one arm or a whole chromosome, is one possible cause of the imbalance in cell metabolism. To investigate the existence of such a gene dosage effect in breast cancer, we chose to study the MUC1 mucin gene located at 1q21-q24. This gene is highly expressed in breast tumors, but the genetic mechanism for its ectopic overexpression is not clearly known. Thirty-two human primary breast tumors were examined, by Southern blot DNA and northern blot RNA analyses, for allelic dosage and expression of the MUC1 gene. A correlation was found between acquisition of additional copies of MUC1 gene and high mRNA levels (p < 0.0001). These results identify a genetic mechanism responsible for MUC1 gene overexpression and support the hypothesis that a gene dosage effect of the long arm of chromosome 1 may be involved in the pathogenesis of breast cancer.
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Authors | I Bièche, R Lidereau |
Journal | Cancer genetics and cytogenetics
(Cancer Genet Cytogenet)
Vol. 98
Issue 1
Pg. 75-80
(Oct 01 1997)
ISSN: 0165-4608 [Print] United States |
PMID | 9309122
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
- DNA, Neoplasm
- Mucin-1
- RNA, Messenger
- DNA
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Topics |
- Breast
(metabolism)
- Breast Neoplasms
(genetics)
- DNA
(genetics)
- DNA, Neoplasm
(genetics)
- Gene Dosage
- Humans
- Mucin-1
(genetics)
- RNA, Messenger
(genetics)
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