The effect of progesterone on oxytocin-stimulated intracellular Ca2plus mobilisation and prostaglandin secretion in porcine endometrium

• Autorzy: Kotwica G. , Oponowicz A. , Kurowicka B. , Franczak A. , Bogacka I.
• Języki publikacji: EN

Abstrakty

EN

We have studied in the porcine endometrium the expression of oxytocin receptor (OTR) mRNA and the effect of progesterone (P₄) on oxytocin/oxytocin receptor (OT/OTR) function concerning intracellular Ca²⁺mobilisation ([Ca²⁺]i), prostaglandin F2α (PGF2α) and E2 (PGE2; PG) secretion. Tissue was taken from cyclic and early pregnant pigs (days 14-16). A higher expression of OTR mRNA (P<0.05) was observed in the endometrium of cyclic than pregnant pigs. The stimulatory (P<0.05) effect of OT (10⁻⁷ M) on [Ca²⁺]i mobilisation was noticed within 15-60 s and 30-60 s in endometrial stromal cells of cyclic and pregnant pigs, respectively. In the presence of P₄ (10⁻⁵ M) basal and OT-stimulated [Ca²⁺]i concentrations decreased in stromal cells during luteolysis and pregnancy. In stromal cells P₄ delayed mobilisation of [Ca²⁺]i in response to OT by 15 s during luteolysis and had no effect during pregnancy. In cyclic and pregnant epithelial cells OT stimulated mobilisation of [Ca²⁺]i in 45 s and 60 s, respectively. Oxytocin increased (P<0.05) PGF2α secretion during luteolysis and pregnancy and PGE2 during luteolysis from endometrial slices. Progesterone did not inhibit this stimulatory effect. During luteolysis OT increased (P<0.05) PGF2α in epithelial and stromal cells and PGE2 secretion in epithelial cells. In the presence of P₄ this effect of OT was reduced only in stromal cyclic cells (6 h culture). The presence of P₄ decreased the effect of OT on [Ca²⁺]i mobilisation only in stromal cells. We found that, in most conditions, P₄ did not inhibit the OT-stimulated secretion of PG in the porcine endometrium.

Słowa kluczowe

EN

progesterone; oxytocin; intracellular calcium; calcium; prostaglandin secretion; porcine endometrium; endometrium; pregnancy; pig; hormone

• Wydawca: -
• Czasopismo: Polish Journal of Veterinary Sciences
• Rocznik: 2010
• Tom: 13
• Numer: 4
• Opis fizyczny: p.615-622,fig.,ref.

Twórcy

autor

Kotwica G.

• Department of Animal Physiology, Faculty of Biology, University of Warmia and Mazury in Olsztyn, Oczapowskiego 1A, 10-719 Olsztyn, Poland

autor

Oponowicz A.

autor

Kurowicka B.

autor

Franczak A.

autor

Bogacka I.

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