Differences in patterns of allelic loss between two common types of adult cancer, breast and colon carcinoma, and Wilms' tumor of childhood
✍ Scribed by P. Devilee; M. Van Den Broek; M. Mannens; R. Slater; C. J. Cornelisse; A. Westerveld; P. Meera Khan
- Publisher
- John Wiley and Sons
- Year
- 1991
- Tongue
- French
- Weight
- 612 KB
- Volume
- 47
- Category
- Article
- ISSN
- 0020-7136
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✦ Synopsis
Several chromosomal regions exhibit loss of heterozygosity (LOH) in different types of human tumor, and on this basis are presumed to carry-suppressor genes. We studied 7 of such chromosome regions, including 3p, Sq, I I p, I3q, I7p, 18q and ZZq, using a selected set of DNA markers in 44 Wilms' tumors, 64 breast and 83 colon carcinomas. In Wilms' tumor only the short arm of chromosome II was preferentially involved (38% of the informative cases), whereas in breast and colorectal carcinomas all investigated chromosome re ions showed allelic 1 0 s at frequencies ranging from I e6 I # and 12-55%, respectively. We tried to explain this difference in terms of developmental stages and tissue homeostasis of the organs involved. We postulate that more widespread occurrence of allele loss in colorectal and breast carcinomas compared to Wilms' tumor is associated with a difference in the differentiation status of the tissues at the time of tumor initiation.