Effects of the insecticides malathion and diazinon on the early oogenesis in mice in vitro

被引:35
作者
Bonilla, Edmundo [1 ]
Hernandez, Fidel [2 ]
Cortes, Leticia [2 ]
Mendoza, Miriam [1 ]
Mejia, Joel [1 ]
Carrillo, Edgar [1 ]
Casas, Eduardo [1 ]
Betancourt, Miguel [1 ]
机构
[1] Univ Autonoma Metropolitana Iztapalapa, Dept Ciencias Salud, Mexico City 09340, DF, Mexico
[2] CINVESTAV IPN, Dept Patol Expt, Mexico City 07360, DF, Mexico
关键词
oogenesis; malathion; diazinon; insecticide; toxicity; gene expression; mouse;
D O I
10.1002/tox.20332
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Malathion and diazinon are two of the most commonly used organophosphorous (OP) agrochemicals. Several studies show that these pesticides exert several effects on mammalian spermatogenesis. Nevertheless, there are no studies concerning their effects on oogenesis. The objective of this study was to evaluate the effects of these insecticides on the viability of in vitro cultured mouse oocytes during the early oogenesis and to get a further understanding of the molecular mechanisms by which OP insecticides act and affect germinal cells. Oocytes were cultured from fetal ovaries for 10 days, when most oocytes had reached the diplotene stage (germinal vesicle stage). Cultures were exposed to different concentrations of malathion or diazinon for 24 h, and the effect on oocyte viability was assessed. Gene expression in oocytes exposed to the insecticides was analyzed by generating cDNA libraries and performing differential screenings. Results show a significant decrease in oocytes survival after 24-h exposure to 250 mu M malathion or 900 nM diazinon, and the effect of these insecticides on the regulation of genes encoding proteins involved in transcription (BP75), translation (ribosomal protein S5), and mitochondrial function (cytochrome oxidase subunits I and III), providing evidence for OP insecticides as toxicants for mammals oocytes during the early oogenesis. (c) 2008 Wiley Periodicals, Inc.
引用
收藏
页码:240 / 245
页数:6
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