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Mutants of Nonproducer Cell Lines Transformed by Murine Sarcoma Virus. II. Relationship of Tumorigenicity to Presence of Viral Markers and Rescuable Sarcoma Genome

Overview
Journal J Exp Med
Date 1973 Aug 1
PMID 4124209
Citations 5
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Abstract

Tumorigenic and nontumorigenic mutants induced by a single 5'-bromodeoxyuridine (BrdU) treatment of a nonproducer (NP) tumorigenic cell line were isolated and characterized. Among the cloned derivatives were examples of virus-free and sarcoma virus-producing cell lines. Oncogenicity did not correlate with production of virus or ease of rescue of the sarcoma genome. All lines, including nononcogenic derivatives, retained the sarcoma genome. Phenotypic reversion of some cell mutants was observed after in vivo inoculation or long term in vitro cultivation. The M-50T cell line, obtained from a tumor induced by M-50 cells, had a sarcoma genome rescuable by direct superinfection; this was only achieved with parental M-50 cells by a cell fusion rescue technique. The M-43-2T cell, obtained from a single small static tumor induced by otherwise nononcogenic M-43-2 cells, shed sarcoma virus and became tumorigenic. M-58-4-48 became tumorigenic after passage 48 of the M-58-4 line, which was originally nontumorigenic. These observations of phenotypic reversion demonstrate that the presence of the sarcoma gene in cells is an essential but not sufficient condition of tumorigenesis.

Citing Articles

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PMID: 4367900 PMC: 355509. DOI: 10.1128/JVI.14.2.239-248.1974.


Mutants of nonproducer cell lines transformed by murine sarcoma virus. 3. Detection and characterization of RNA specific for helper and sarcoma viruses.

Tsuchida N, Shih M, Gilden R, Hatanaka M J Exp Med. 1974; 140(1):218-24.

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Sarcoma-virus-related RNA sequences in normal rat cells.

Tsuchida N, Gilden R, Hatanaka M Proc Natl Acad Sci U S A. 1974; 71(11):4503-7.

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Sarcoma and helper-specific RNA tumor virus subunits in transformed nonproducer mouse cells activated to produce virus by treatment with bromodeoxyuridine.

Tsuchida N, SHIH M, Gilden R, Hatanaka M J Virol. 1974; 14(5):1262-7.

PMID: 4139290 PMC: 355643. DOI: 10.1128/JVI.14.5.1262-1267.1974.


Tumorigenicity of Indian muntjac diploid cells by the proviral integration of sarcoma gene of a mouse retrovirus.

Hatanaka M, Klein R J Exp Med. 1979; 150(5):1195-201.

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