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Maternal exposure to estrogenic pesticides, such as 1,1\u2010bis(<jats:italic>p<\/jats:italic>\u2010chlorophenyl)\u20102,2,2\u2010trichloroethane (DDT) and methoxychlor (MTC), has been shown to result in reproductive disorders and\/or abnormal fetal development. In this study, we have examined the effects of exposure of trophoblastic cells to MTC and DTT, in comparison to 17\u03b2\u2010estradiol (E2) and diethylstilbestrol (DES), to test the hypothesis that cellular Ca handling is a target for these endocrine disruptive components. Treatment with DDT, MTC, DES, or E2 increased cellular Ca uptake, and the expression of trophoblast\u2010specific human Ca binding protein (HCaBP) was down\u2010regulated by both MTC and DDT. Treatment with MTC, DDT, and DES inhibited cell proliferation, induced apoptosis, and suppressed expression of several trophoblast differentiation marker genes. These effects were reversed by overexpression of metallothionein IIa, a gene highly responsive to cadmium and other metals. These results strongly suggest that trophoblast Ca handling functions are endocrinally modulated, and that their alteration by candidate endocrine disruptors, such as MTC and DDT, constitutes a possible pathway of the harmful effects of these components on fetal development. J. Cell. Biochem. 89: 755\u2013770, 2003. \u00a9 2003 Wiley\u2010Liss, Inc.<\/jats:p>","DOI":"10.1002\/jcb.10558","type":"journal-article","created":{"date-parts":[[2003,7,8]],"date-time":"2003-07-08T10:06:08Z","timestamp":1057658768000},"page":"755-770","source":"Crossref","is-referenced-by-count":32,"title":["Estrogenic endocrine disruptive components interfere with calcium handling and differentiation of human trophoblast 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