GENOTOXIC EFFECTS OF GOSSYPOL ACETIC-ACID ON CULTURED MURINE ERYTHROLEUKEMIA-CELLS

被引:8
|
作者
MAJUMDAR, SK
DALY, EP
KLEEMEYER, KM
DAEHLER, CC
BAKER, MA
机构
[1] Department of Biology, Lafayette College, Easton, Pennsylvania
关键词
UNSCHEDULED DNA SYNTHESIS; SCANNING ELECTRON MICROSCOPY; CELL SURFACE ULTRASTRUCTURE;
D O I
10.1002/em.2850180309
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Gossypol acetic acid, a male anti-fertility drug was evaluated for its effects on cell multiplication, chromosomes, scheduled and unscheduled DNA synthesis, and the surface ultrastructure in cultured murine erythroleukemia cells (clone 6A11A). Gossypol treatments inhibited cell multiplication at 10 and 20-mu-g/ml concentrations and this inhibitory effect increased with elevated dosage and prolonged treatment. Gossypol significantly depressed the mitotic index but did not alter chromosome numbers or increase the frequency of chromosomal structural abnormalities. Cell fraction techniques revealed that gossypol induced a negative effect on cellular DNA synthesis at concentrations as low as 3.3-mu-g/ml after 24 hr of treatment. The number of cells undergoing DNA synthesis decreased with increasing dosages and durations of drug exposure. An unscheduled DNA synthesis assay (UDS) found gossypol to be an active UDS-inducing agent at certain dose levels and treatment times, as measured by increase in net nuclear gain and percentage of UDS cells (ANOVA, Bonferroni test, P < 0.05). A scanning electron microscope study revealed that 10-mu-g/ml treatment with gossypol caused changes in mouse erythroleukemia cell surface ultrastructure characterized by general balding and the appearance of holes, often after 48 hr of treatment.
引用
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页码:212 / 219
页数:8
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