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In vitro and in vivo transformation in rat tracheal epithelial cells exposed to diesel emission particles and related compounds.

Authors
Ensell-MX; Whong-WZ; Heng-ZC; Nath-J; Ong-T
Source
Mutat Res 1998 Feb; 412(3):283-291
NIOSHTIC No.
20025172
Abstract
The rat tracheal epithelial (RTE) cell transformation assay was performed to determine the transforming activity of diesel emission particles (DEPs) and two related compounds, 1-nitropyrene (1-NP) and dibenzo(a,i)pyrene (DBP). RTE cells were treated with these agents in vitro and in vivo. Transformed cells from foci induced by these agents were passaged over 20 times to establish immortal cell lines. Results show that (1) DEPs- and 1-NP-induced cell transformation only with the in vivo exposure (30-75 mg/kg bw DEPs and 15-60 mg/kg bw 1-NP); (2) positive dose-related responses to DBP were found with both in vitro (0.05-0.50 g/ml) and in vivo (7.5-30 mg/kg bw) exposures; (3) the fraction of transformed foci becoming cell lines was in the order of 1-NP(25/48)>DBP(8/28)>DEPs(0/30). These results indicate that (1) DEPs, 1-NP and DBP are capable of transforming rat tracheal epithelial cells, however, the transforming activity of DEPs and 1-NP may be dependent on metabolic activation, and (2) transformed cells induced by DEPs have a very low probability, if any, of becoming cell lines.
Keywords
Animal-studies; Animals; Laboratory-animals; Diesel-exhausts; Diesel-emissions; Cellular-function; Cellular-reactions; In-vivo-study; In-vitro-study; Particulates; Particulate-dust; Author Keywords: Rat tracheal epithelial cells; Transformation; Diesel; 1-Nitropyrene; Dibenzo(a,i)pyrene
CODEN
MUREAV
Publication Date
19980213
Document Type
Journal Article
Fiscal Year
1998
NTIS Accession No.
NTIS Price
Issue of Publication
3
ISSN
0027-5107
NIOSH Division
HELD
Source Name
Mutation Research
State
WV
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