title: The adverse effects of aldrin and dieldrin on both myometrial contractions and the secretory functions of bovine ovaries and uterus in vitro.
abstract: Aldrin and dieldrin are chloroorganic insecticides which are recognised as endocrine disruptors. The aim of the study was to investigate their effect on the secretory functions of the uterus and ovary and on myometrial contractions. Myometrial strips and uterine and ovarian cells from nonpregnant cows were incubated with the xenobiotics (0.1, 1 or 10 ng/ml) for 24 or 72 h. Next, their effect on viability of myometrial, endometrial, granulosa and luteal cells, myometrial strip contractions, the synthesis and secretion of prostaglandins (PGs: PGF2α and PGE2) from uterine cells, the secretion of oestradiol (E2), testosterone (T) and oxytocin (OT) from granulosa cells and the secretion of progesterone (P4) and OT from luteal cells were determined. Neither of the xenobiotics (10 ng/ml) affected (P>0.05) the viability of the ovarian and uterine cells, while both (0.1-10 ng/ml) decreased (P<0.05) the basal and OT-stimulated myometrial contractions. In spite of these effects, neither of the insecticides affected (P>0.05) the synthesis and the secretion of PGs from the myometrial cells. Although they also did not impair the secretion of the PGs from the endometrial cells, they abolished (P<0.05) the stimulatory effect of OT (P<0.05) on the secretion of the PGs and stimulated (P<0.05) the secretion of OT from the granulosa and luteal cells. Moreover, aldrin and dieldrin stimulated secretion of E2 and T from the granulosa cells, while only dieldrin increased (P<0.05) the secretion of P4 from luteal cells. The data show that aldrin and dieldrin stimulated the secretory function of the cultured granulosa and luteal cells and inhibited the myometrial contractions of cows in vitro, which may affect on natural parturition.
authors.affiliation: Institute of Animal Reproduction and Food Research of the Polish Academy of Sciences, Tuwima Street 10, 10-748 Olsztyn, Poland. Electronic address: m.wrobel@pan.olsztyn.pl.
authors.forename: Michał H
authors.initials: MH
authors.lastname: Wrobel
authors.affiliation: Institute of Animal Reproduction and Food Research of the Polish Academy of Sciences, Tuwima Street 10, 10-748 Olsztyn, Poland.
authors.forename: Marlena
authors.initials: M
authors.lastname: Grzeszczyk
authors.affiliation: Institute of Animal Reproduction and Food Research of the Polish Academy of Sciences, Tuwima Street 10, 10-748 Olsztyn, Poland.
authors.forename: Jaroslaw
authors.initials: J
authors.lastname: Mlynarczuk
authors.affiliation: Institute of Animal Reproduction and Food Research of the Polish Academy of Sciences, Tuwima Street 10, 10-748 Olsztyn, Poland.
authors.forename: Jan
authors.initials: J
authors.lastname: Kotwica
mesh_terms: D000452:Aldrin / Q000633:toxicity*; D000818:Animals; D002417:Cattle; D002478:Cells, Cultured; D004026:Dieldrin / Q000633:toxicity*; D015237:Dinoprost / Q000378:metabolism; D015232:Dinoprostone / Q000378:metabolism; D004305:Dose-Response Relationship, Drug; D052244:Endocrine Disruptors / Q000633:toxicity*; D004958:Estradiol / Q000378:metabolism; D005260:Female; D015971:Gene Expression Regulation, Enzymologic / Q000187:drug effects; D006107:Granulosa Cells / Q000187:drug effects / Q000378:metabolism; D007306:Insecticides / Q000633:toxicity*; D008184:Luteal Cells / Q000187:drug effects / Q000378:metabolism; D010053:Ovary / Q000187:drug effects* / Q000378:metabolism; D010121:Oxytocin / Q000378:metabolism; D011374:Progesterone / Q000378:metabolism; D013739:Testosterone / Q000378:metabolism; D013997:Time Factors; D046509:Tissue Culture Techniques; D014590:Uterine Contraction / Q000187:drug effects*; D014599:Uterus / Q000187:drug effects* / Q000378:metabolism
chemical_list: D052244:Endocrine Disruptors; D007306:Insecticides; D013739:Testosterone; D011374:Progesterone; D004958:Estradiol; D010121:Oxytocin; D015237:Dinoprost; D004026:Dieldrin; D015232:Dinoprostone; D000452:Aldrin
keywords: Chloroorganic insecticides; Contractions; Cow; Ovary; Uterus