Loss of heterozygosity at 10q in tumors of the upper respiratory tract is associated with poor prognosis.
Int J Cancer
; 84(4): 432-6, 1999 Aug 20.
Article
en En
| MEDLINE
| ID: mdl-10404099
ABSTRACT
Frequent loss of a specific chromosomic region in cancers is often associated with inactivation of a tumor-suppressor gene. The long arm of chromosome 10 is deleted in several types of tumor, among them squamous-cell carcinomas of the head and neck (HNSCC). To determine the role of 10q deletions in the tumorigenesis of the upper respiratory tract, 47 HNSCCs were examined for loss of heterozygosity (LOH) at 10q 43% of the cases analyzed showed LOH at 10q, and 2 distinct hot spots of deletion were identified, at 10q22-23 and 10q25-26. The possible involvement of pTEN/MMAC1, a tumor-suppressor gene mapped at 10q23, was also evaluated. No mutation, homozygous deletion or loss of expression of pTEN/MMAC1 was detected, indicating that inactivation of this gene plays a minor role in HNSCC development. Interestingly, the frequency of deletion at 10q was greater in invasive carcinoma than in adjacent carcinoma in situ, and a significant association between LOH and poor prognosis was observed. Taken together, our results suggest the presence in the long arm of chromosome 10 of (a) tumor-suppressor gene(s) other than pTEN/MMAC1 and presumably involved in the malignant progression of tumors of the upper respiratory tract. Int. J. Cancer (Pred. Oncol.) 84432-436, 1999.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Neoplasias del Sistema Respiratorio
/
Cromosomas Humanos Par 10
/
Carcinoma de Células Escamosas
/
Polimorfismo Conformacional Retorcido-Simple
/
Pérdida de Heterocigocidad
/
Neoplasias de Cabeza y Cuello
Tipo de estudio:
Prognostic_studies
/
Risk_factors_studies
Límite:
Humans
Idioma:
En
Revista:
Int J Cancer
Año:
1999
Tipo del documento:
Article
País de afiliación:
Italia