Polyoma DNA replication dependent upon growth condition of SEWA sarcoma cells.

Abstract:

:Extrachromosomal replication of viral DNA sequences has been observed in transformed as well as in normal cells following "stress"-inducing treatments. To explore the effect of growth conditions on the ability to support such replication, we analyzed SEWA sarcoma cells that grew subcutaneously or as ascites tumors in vivo as well as cell lines that were established from each of these tumors. The replicative form of polyoma DNA sequences was observed in SEWA tumors grown in ascites fluids but not in cells maintained as solid tumors. Polyoma DNA replication was found in ascites-derived cells that were adapted to grow in culture, only when the cultured cells are stimulated with UV irradiation. Immunoprecipitation of T antigens enabled detection of large T antigen only in the ascites-derived cells. The mechanisms that may regulate this phenomenon and the possible role large T may play in different growth conditions of SEWA cells are discussed.

journal_name

Mol Carcinog

journal_title

Molecular carcinogenesis

authors

Robinson R,Ronai Z

doi

10.1002/mc.2940030506

subject

Has Abstract

pub_date

1990-01-01 00:00:00

pages

268-72

issue

5

eissn

0899-1987

issn

1098-2744

journal_volume

3

pub_type

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