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Alterations of the p53 gene are common and critical events for the maintenance of malignant phenotypes in small-cell lung carcinoma.

Abstract：

:To clarify the incidence, timing and pathogenetic significance of p53 gene alterations in the progression of small-cell lung carcinoma (SCLC), 17 primary tumors, 13 metastases and nine cell lines from 27 patients were analysed by a polymerase chain reaction-single-strand conformation polymorphism (PCR-SSCP) analysis. Allelic losses and mutations of the p53 gene were detected in 24 out of 25 informative cases (96%) and 23 out of 27 cases (85%) respectively. Simultaneous losses and mutations were detected in all 16 stage III-IV tumors, while these alterations were detected only in 3 of 6 stage I-II tumors. When allelic losses and/or mutations were detected in the primary tumors, the same alterations were always maintained in the process of metastasis. In three cases, identical p53 alterations were detected among different organ metastases. The mutations detected in five cell lines were also detected in the corresponding original tumors. These results suggest that the alterations of the p53 gene are common and early events, but probably not the first events, in the development of SCLC, and that these alterations are essential for the maintenance of malignant phenotypes in the progression of SCLC.

journal_name

Oncogene

journal_title

Oncogene

authors

Sameshima Y,Matsuno Y,Hirohashi S,Shimosato Y,Mizoguchi H,Sugimura T,Terada M,Yokota J

subject

Has Abstract

pub_date

1992-03-01 00:00:00

pages

451-7

issue

3

eissn

0950-9232

issn

1476-5594

journal_volume

7

pub_type

杂志文章

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