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Inhibition of radiation-induced transformation in vitro by bacterial endotoxins

Abstract

Bacterial endotoxins (lipopolysaccharides) were found to suppress X-ray-induced malignant transformation of C3H/10T1/2 cells. Endotoxins were effective if present either throughout the 6-week transformation assay period, or for the final 4-week phase, but not when present only for the initial 2-week phase. Neither growth nor survival of C3H/10T1/2 cells, or a radiation-transformed cell line derived from them, were affected by endotoxins. Also, the endotoxins did not affect the formation of foci by the radiation transformed cells when these cells were co-cultured with untransformed cells. These results suggest that endotoxins exert their effect directly upon the transformation process itself, perhaps at a 'late' step in the conversion of an untransformed to a transformed cell.
Publication Date:
May 01, 1988
Product Type:
Journal Article
Reference Number:
GBN-88-002625; EDB-88-125356
Resource Relation:
Journal Name: Carcinogenesis; (United Kingdom); Journal Volume: 9:5
Subject:
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.; ENDOTOXINS; RADIOSENSITIVITY EFFECTS; BACTERIA; CELL CULTURES; EMBRYONIC CELLS; IN VITRO; INHIBITION; MICE; ONCOGENIC TRANSFORMATIONS; RESPONSE MODIFYING FACTORS; X RADIATION; ANIMAL CELLS; ANIMALS; ANTIGENS; CELL TRANSFORMATIONS; ELECTROMAGNETIC RADIATION; IONIZING RADIATIONS; MAMMALS; MATERIALS; MICROORGANISMS; RADIATIONS; RODENTS; TOXIC MATERIALS; TOXINS; VERTEBRATES; 560120* - Radiation Effects on Biochemicals, Cells, & Tissue Culture
OSTI ID:
6969145
Research Organizations:
Harvard School of Public Health, Boston, MA (USA)
Country of Origin:
United Kingdom
Language:
English
Other Identifying Numbers:
Journal ID: CODEN: CRNGD
Submitting Site:
GBN
Size:
Pages: 725-729
Announcement Date:
Jul 01, 1988

Citation Formats

Carew, J A, Collins, M F, and Kennedy, A R. Inhibition of radiation-induced transformation in vitro by bacterial endotoxins. United Kingdom: N. p., 1988. Web. doi:10.1093/carcin/9.5.725.
Carew, J A, Collins, M F, & Kennedy, A R. Inhibition of radiation-induced transformation in vitro by bacterial endotoxins. United Kingdom. https://doi.org/10.1093/carcin/9.5.725
Carew, J A, Collins, M F, and Kennedy, A R. 1988. "Inhibition of radiation-induced transformation in vitro by bacterial endotoxins." United Kingdom. https://doi.org/10.1093/carcin/9.5.725.
@misc{etde_6969145,
title = {Inhibition of radiation-induced transformation in vitro by bacterial endotoxins}
author = {Carew, J A, Collins, M F, and Kennedy, A R}
abstractNote = {Bacterial endotoxins (lipopolysaccharides) were found to suppress X-ray-induced malignant transformation of C3H/10T1/2 cells. Endotoxins were effective if present either throughout the 6-week transformation assay period, or for the final 4-week phase, but not when present only for the initial 2-week phase. Neither growth nor survival of C3H/10T1/2 cells, or a radiation-transformed cell line derived from them, were affected by endotoxins. Also, the endotoxins did not affect the formation of foci by the radiation transformed cells when these cells were co-cultured with untransformed cells. These results suggest that endotoxins exert their effect directly upon the transformation process itself, perhaps at a 'late' step in the conversion of an untransformed to a transformed cell.}
doi = {10.1093/carcin/9.5.725}
journal = []
volume = {9:5}
journal type = {AC}
place = {United Kingdom}
year = {1988}
month = {May}
}