The formation of variants with a reversion of properties of transformed cells. VIII. in vitro limited life span of variants isolated from tumors
- 15 November 1972
- journal article
- Published by Wiley in International Journal of Cancer
- Vol. 10 (3) , 607-612
- https://doi.org/10.1002/ijc.2910100320
Abstract
Cells transformed after treatment with the chemical carcinogen dimethylnitrosamine (DMNA) inoculated into animals, can produce tumors containing variants with a reversion of in vitro properties of transformed cells. In contrast to variants from tumors produced by polyoma‐transformed cells, 83% of the variants in tumors from DMNA‐transformed cells had again acquired, like normal cells, a limited life‐span. in vitro. Seventeen % of the variants escaped the termination of their life‐span by re‐reverting to the transformed state. FORMATION DE MUTANTS AVEC UNE RÉVERSION DES PROPRléTÉS DES CELLULES TRANSFORMÉES. VIII. VIE LIMITEE IN VITRO DES MUTANTS ISOLES A PARTIR DE TUMEURS Des cellules transformées après inoculation du carcinogène chimique diméthyl‐nitrosamine (DMNA) à des animaux peuvent produire des tumeurs formées de mutants présentant une réversion des propriétés in vitro des cellules transformées. Contrairement aux mutants provenant de tumeurs produites par des cellules transformées par le polyome, 83% des mutants présents dans les tumeurs provenant de cellules transformées par le DMNA ont retrouvé, comme les cellules normales, une vie limitée in vitro Dix‐sept pour cent des mutants échappent à la mort grǎce à une re‐réversion qui les ramène à l'état transformé.Keywords
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