Codon 61 mutations in the c-Harvey-ras gene in mouse skin tumors induced by 7,12-dimethylbenz[a]anthracene plus okadaic acid class tumor promoters.

Abstract:

:Three okadaic acid class tumor promoters, okadaic acid, dinophysistoxin-1, and calyculin A, have potent tumor-promoting activity in two-stage carcinogenesis experiments on mouse skin. DNA isolated from tumors induced by 7,12-dimethylbenz[a]anthracene (DMBA) and each of these tumor promoters revealed the same mutation at the second nucleotide of codon 61 (CAA----CTA) in the c-Ha-ras gene, determined by the polymerase chain reaction procedure and DNA sequencing. Three potent 12-O-tetradecanoylphorbol-13-acetate (TPA)-type tumor promoters, TPA, teleocidin, and aplysiatoxin, showed the same effects. These results provide strong evidence that this mutation in the c-Ha-ras gene is due to a direct effect of DMBA rather than a selective effect of specific tumor promoters.

journal_name

Mol Carcinog

journal_title

Molecular carcinogenesis

authors

Fujiki H,Suganuma M,Yoshizawa S,Kanazawa H,Sugimura T,Manam S,Kahn SM,Jiang W,Hoshina S,Weinstein IB

doi

10.1002/mc.2940020403

subject

Has Abstract

pub_date

1989-01-01 00:00:00

pages

184-7

issue

4

eissn

0899-1987

issn

1098-2744

journal_volume

2

pub_type

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