Prolactin secretion by human chorion-decidua in vitro: influences of mode of delivery and agents that modify prostaglandin synthesis.
Prolactin production by human decidua was examined with the use of a short-term tissue explant system. Decidua obtained after normal spontaneous vaginal deliveries produced significantly more prolactin than did tissue obtained after elective repeat cesarean section deliveries in the absence of labor (P less than 0.005). Cytosolic prolactin levels did not differ between the two delivery modes. Oxytocin (4.3 X 10(-11) M to 4.3 X 10(-6) M) and eicosatetraenoic acid (10(-7) M to 10(-4) M) had no effect on prolactin production or storage by decidual tissue. Indomethacin at 10(-4) M reduced only levels of stored prolactin but had no effect on stored or produced prolactin at lower concentrations (10(-7) M to 10(-5) M). Arachidonic acid (10(-4) M) suppressed both production and storage of prolactin (P less than 0.05). Decidual tissue from the two delivery modes did not differ in response to the above agents. Although the exact mechanism(s) remains obscure, these results indicate decidual prolactin production is altered by some aspect of labor. The possible involvement of prostaglandin precursors in mediating this production cannot be excluded.
D001095:Arachidonic Acids / Q000494:pharmacology; D002585:Cesarean Section; D002823:Chorion / Q000187:drug effects / Q000378:metabolism*; D003656:Decidua / Q000187:drug effects / Q000378:metabolism*; D005260:Female; D006801:Humans; D007213:Indomethacin / Q000494:pharmacology; D008297:Male; D010121:Oxytocin / Q000494:pharmacology; D011247:Pregnancy; D011388:Prolactin / Q000378:metabolism*; D011453:Prostaglandins / Q000096:biosynthesis*; D012086:Reoperation
D001095:Arachidonic Acids; D011453:Prostaglandins; D010121:Oxytocin; D011388:Prolactin; D007213:Indomethacin