Conditions leading to the establishment of the N (a gene dependent) and A (a gene independent) transformed states after polyoma virus infection of rat fibroblasts.

Abstract:

:Infection of normal rat fibroblasts (FR 3T3) with the early tsa mutant of polyoma virus may lead to either the A or the N phenotype, tsa-A transformants, originally derived by agar selection, are not temperature dependent for maintenance of the transformed phenotype, whereas tsa-N transormants revert at high temperature to normal growth control. A transformants did not result from an independent cellular mutation selected in agar medium, but rather from a transformation process distinct from that leading to the N state. It occurred in both liquid and agar media when the infected cells were maintained under growth-restricting conditions, such as absence of anchorage and contact inhibition at confluency. N transformation occurred in cells maintained in active growth after virus infection (sparse cultures on a solid substratum). Physiological conditions during a critical period after virus infection thus appear to be a crucial parameter of the transformation process.

journal_name

J Virol

journal_title

Journal of virology

authors

Rassoulzadegan M,Seif R,Cuzin F

doi

10.1128/JVI.28.2.421-426.1978

subject

Has Abstract

pub_date

1978-11-01 00:00:00

pages

421-6

issue

2

eissn

0022-538X

issn

1098-5514

journal_volume

28

pub_type

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