Four regions of allelic imbalance on 17q12-qter associated with high-grade breast tumors
Article first published online: 7 DEC 1998
Copyright © 1997 Wiley-Liss, Inc.
Genes, Chromosomes and Cancer
Volume 20, Issue 4, pages 354–362, December 1997
How to Cite
Plummer, S. J., Paris, M. J., Myles, J., Tubbs, R., Crowe, J. and Casey, G. (1997), Four regions of allelic imbalance on 17q12-qter associated with high-grade breast tumors. Genes Chromosom. Cancer, 20: 354–362. doi: 10.1002/(SICI)1098-2264(199712)20:4<354::AID-GCC6>3.0.CO;2-0
- Issue published online: 7 DEC 1998
- Article first published online: 7 DEC 1998
- Manuscript Accepted: 13 JUN 1997
- Manuscript Received: 19 MAR 1997
- NIH. Grant Number: CA58860
- Department of Defense. Grant Number: DAMD 17-94-J-4337
Rearrangements or loss of chromosome 17 are frequent events in breast tumors. Chromosome 17 contains at least four genes implicated in breast cancer (TP53, ERBB2 (Her2/neu), BRCA1, and NM23), as well as other putative tumor suppressor genes and oncogenes implicated in loss of heterozygosity or allelic imbalance studies. Allelic imbalance represents the addition or loss of genetic material in tumor samples, providing circumstantial evidence for the location of cancer related genes. We have analyzed a panel of 85 breast tumor/normal tissue pairs with 21 PCR-based short tandem repeat (STR) markers located at 17q12-qter to more precisely define regions of allelic imbalance and to determine their relation to clinical parameters. Our analysis revealed at least four common regions of allelic imbalance: proximal to BRCA1, including D17S800 (17q12); distal to NM23 around D17S787 (17q22); near the growth hormone (GH) locus, at D17S948 (17q23-24); and between markers D17S937 and D17S802 (17q25). These data also reveal that loss (or gain) of 17q genetic material correlates with poorly differentiated (grade III) tumors (P = <0.001), high S phase fraction (P = 0.034), and positive TP53 immunohistochemical staining (P = 0.011). However, steroid receptor status, ERBB2 (Her2/neu) staining, and aneuploidy do not correlate with allelic imbalance at 17q. Genes Chromosomes Cancer 20:354–362, 1997. © 1997 Wiley-Liss, Inc.