Conceptus estrogen and prostaglandins provide the maternal recognition of pregnancy signal to prevent luteolysis during early pregnancy in the pig†.

Autor:	Sullivan RM; Division of Animal Sciences, University of Missouri, Columbia, MO, USA., Lucas CG; Division of Animal Sciences, University of Missouri, Columbia, MO, USA., Sponchiado M; Division of Animal Sciences, University of Missouri, Columbia, MO, USA., Eitel EK; Division of Animal Sciences, University of Missouri, Columbia, MO, USA., Spate LD; Division of Animal Sciences, University of Missouri, Columbia, MO, USA., Lucy MC; Division of Animal Sciences, University of Missouri, Columbia, MO, USA., Smith MF; Division of Animal Sciences, University of Missouri, Columbia, MO, USA., Wells KD; Division of Animal Sciences, University of Missouri, Columbia, MO, USA., Prather RS; Division of Animal Sciences, University of Missouri, Columbia, MO, USA., Geisert RD; Division of Animal Sciences, University of Missouri, Columbia, MO, USA.
Jazyk:	angličtina
Zdroj:	Biology of reproduction [Biol Reprod] 2024 Oct 14; Vol. 111 (4), pp. 890-905.
DOI:	10.1093/biolre/ioae104
Abstrakt:	Conceptus estrogens and prostaglandins have long been considered the primary signals for maternal recognition of pregnancy (MRP) in the pig. However, loss-of-function studies targeting conceptus aromatase genes (CYP19A1 and CYP19A2) and prostaglandin-endoperoxide synthase 2 (PTGS2) indicated that conceptuses can not only signal MRP without estrogens or prostaglandins but can maintain early pregnancy. However, complete loss of estrogen production leads to abortion after day 25 of gestation. Although neither conceptus estrogens nor prostaglandins had a significant effect on early maintenance of corpora lutea (CL) function alone, the two conceptus factors have a biological relationship. To investigate the role that both conceptus estrogens and prostaglandins have on MRP and maintenance of pregnancy, a triple loss-of function model (TKO) was generated for conceptus CYP19A1, CYP19A2, and PTGS2. In addition, a conceptus CYP19A2-/- model (A2KO) was established to determine the role of placental estrogen during later pregnancy. Estrogen and prostaglandin synthesis were greatly reduced in TKO concept uses which resulted in a failure to inhibit luteolysis after day 15 of pregnancy despite the presence of conceptuses in the uterine lumen. However, A2KO placentae not only maintained functional CL but were able to maintain pregnancy to day 32 of gestation. Despite the loss of placental CYP19A2 expression, the allantois fluid content of estrogen was not affected as the placenta compensated by expressing CYP19A1 and CYP19A3, which are normally absent in controls. Results suggest conceptuses can signal MRP through production of conceptus PGE or stimulating PGE synthesis from the endometrium through conceptus estrogen. Failure of conceptuses to produce both factors results in failure of MRP and loss of pregnancy. (© The Author(s) 2024. Published by Oxford University Press on behalf of Society for the Study of Reproduction. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.)
Databáze:	MEDLINE
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