The adverse effects of aldrin and dieldrin on both myometrial contractions and the secretory functions of bovine ovaries and uterus in vitro

Journal Article · Fri May 15 04:00:00 EDT 2015 · Toxicology and Applied Pharmacology

DOI:https://doi.org/10.1016/J.TAAP.2015.03.005· OSTI ID:22465756

Grzeszczyk, Marlena; Mlynarczuk, Jaroslaw; Kotwica, Jan

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. - Highlights: • Aldrin and dieldrin inhibited bovine myometrial contractions. • The studied xenobiotics stimulated steroids and oxytocin secretion from ovaries. • Prostaglandins are not involved in adverse effect of the xenobiotics on uterine contractions. • On this basis, we believe that aldrin and dieldrin can hinder the course and onset of parturition.

• OSTI ID: 22465756
• Journal Information: Toxicology and Applied Pharmacology, Journal Name: Toxicology and Applied Pharmacology Journal Issue: 1 Vol. 285; ISSN TXAPA9; ISSN 0041-008X
• Country of Publication: United States
• Language: English

Related Subjects

60 APPLIED LIFE SCIENCES
ACTINOMYCIN
ALDRIN
ARACHIDONIC ACID
CONTRACTION
COWS
DDT
DIELDRIN
IN VITRO
OVARIES
OXYTOCIN
PARTURITION
PROGESTERONE
PROSTAGLANDINS
SALTS
SECRETION
TESTOSTERONE
TETRAZOLIUM
UTERUS
VIABILITY
XENOBIOTICS