Detection of frequent allelic loss on proximal chromosome 17q in sporadic breast carcinoma using microsatellite length polymorphisms.
Cancer Res
; 52(9): 2624-7, 1992 May 01.
Article
en En
| MEDLINE
| ID: mdl-1568230
ABSTRACT
Analyses of losses of heterozygosity and linkage studies have implicated a gene(s) on chromosome 17q in the genesis of sporadic and early-onset familial breast carcinomas, respectively. To define the critical region of 17q, we examined DNAs from a series of 20 sporadic breast carcinomas and corresponding blood samples for allelic losses of chromosome 17q using microsatellite length polymorphisms. With these highly informative markers (average heterozygosity, 0.73), we observed frequent deletions of 17q at several loci. We found that D17S250 was deleted in 50% (7 of 14), THRA1 in 79% (11 of 14), D17S579 in 59% (11 of 19), NME1 in 29% (5 of 17), MPO in 36% (4 of 11), and GH in 25% (4 of 16) in the tumor set examined. A common region of deletion was found that was flanked by D17S250 to D15S579. These markers have recently been localized to a 6-cM interval of proximal chromosome 17q in bands 17q11.2-q21 and map within the region of the early-onset familial breast cancer locus, implying that the same gene or genes may be involved in both sporadic and familial breast tumors. Thyroid hormone receptor alpha and retinoic acid receptor alpha are two potential candidate genes in this region.
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Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Cromosomas Humanos Par 17
/
Neoplasias de la Mama
/
ADN de Neoplasias
/
ADN Satélite
/
Deleción Cromosómica
/
Heterocigoto
Tipo de estudio:
Diagnostic_studies
Límite:
Female
/
Humans
Idioma:
En
Revista:
Cancer Res
Año:
1992
Tipo del documento:
Article