Record Display for the EPA National Library Catalog

RECORD NUMBER: 44 OF 313

OLS Field Name OLS Field Data
Main Title Cytogenetic Analyses of Mice Exposed to Dichloromethane.
Author Allen, J. ; Kligerman, A. ; Campbell, J. ; Westbrook-Collins, B. ; Erexson., G. ;
CORP Author Health Effects Research Lab., Research Triangle Park, NC. ;Environmental Health Research and Testing, Inc., Research Triangle Park, NC. ;National Inst. of Environmental Health Sciences, Research Triangle Park, NC.
Publisher c1990
Year Published 1990
Report Number EPA/600/J-90/168;
Stock Number PB91-115824
Additional Subjects Toxicology ; Respiration ; Mice ; Bone marrow ; Lymphocytes ; Erythrocytes ; Lung ; Cells(Biology) ; Reprints ; Methylene chloride ; Cytogenetics ; Dose-response relationships ; Chromosome aberrations ; Sister chromatid exchange ; Carcinogenicity tests ; Mutagenicity tests
Holdings
Library Call Number Additional Info Location Last
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Status
NTIS  PB91-115824 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 03/04/1991
Collation 10p
Abstract
Chromosome damage was studied in female B6C3F1 mice exposed to dichloromethane (DCM) by subcutaneous or inhalation treatments. No increase in either the frequencies of sister chromatid exchanges (SCEs) or chromosome aberrations (CAs) in bone marrow cells was observed after a single subcutaneous injection of either 2,500 or 5,000 mg/kg DCM. Inhalation exposure to DCM for 10 days at doses of 4,000 or 8,000 ppm resulted in significant increases in frequencies of SCEs in lung cells and peripheral blood lymphocytes, CAs in lung and bone marrow cells, and micronuclei (MN) in peripheral blood erythrocytes. Lung cell CAs and blood erythrocyte MN reached frequencies of approximately two times control levels. Following a 3-month inhalation exposure to 2,000 ppm DCM, mice showed small but significant increases in lung cell SCEs and peripheral blood erythrocyte MN. These findings suggest that genotoxicity may play a role in the carcinogenicity of DCM in the lungs of B6C3F1 female mice. (Copyright (c) Wiley-USS, Inc.)