Title:	Effects of Prostaglandins E2 and F2alpha on the in vitro maturation of bovine oocytes.
Authors:	RODRIGUES, S. A. D. PONTELO, T. P. KUSSANO, N. R. KAWAMOTO, T. S. LEME, L. O. CAIXETA, F. M. C. PFEIFER, L. F. M. FRANCO, M. M. DODE, M. A. N.
Affiliation:	SARAH A. D. RODRIGUES, Universidade de Brasília THAIS P. PONTELO, Universidade Federal de Lavras NAYARA R. KUSSANO, Universidade de Brasília TAYNAN S. KAWAMOTO, Universidade Federal de Uberlândia LIGIANE O. LEME, Universidade Federal do Espírito Santo FELIPPE M. C. CAIXETA, Universidade de Brasília LUIZ FRANCISCO MACHADO PFEIFER, CPAF-RO MAURICIO MACHAIM FRANCO, Cenargen MARGOT ALVES NUNES DODE, Cenargen.
Date Issued:	2020
Citation:	Domestic Animal Endocrinology, v. 72, article 106447, 2020.
Description:	We aimed to elucidate the effects of PGE2 and PGF2a on the in vitro maturation (IVM) of bovine oocytes. First, cumulus-oocyte complexes were matured in the media supplemented with or without PGE2, PGF2a, or PGE2 plus PGF2a for the final 24, 12, or 6 h of culture. Then, the cumulus-oocyte complexes were matured in the absence or presence of a PG endoperoxide synthase 2 (PTGS2) enzyme inhibitor (NS398) supplemented with PGE2, PGF2a, or PGE2 plus PGF2a. Finally, the expression of genes associated with PGs activity in cumulus cells (PTGS2, PG E-synthase-1 [PTGES1], and aldo-keto reductase 1 [AKR1B1]) or oocytes (receptors for PGE2 [PTGER2] and PGF2a [PTGFR]) of different competencies was quantified. Supplementation of the IVM medium with PGs did not improve in vitro embryo production or embryo quality (P > 0.05). During maturation, the relative abundance of PTGS2 transcripts increased (P < 0.05) only in the less-competent group, whereas those of PTGES1 increased in the less-competent and in the more-competent groups. Conversely, AKR1B1 expression decreased only in the less-competent group (P < 0.05). Receptors for the PGE2 and PGF2a genes were very low or undetectable in oocytes. In conclusion, PGE2 and PGF2a are not recommended for media supplementation during maturation because they have no effect on embryo development. Although genes related to PGs activity are differentially expressed in cumulus cells of cumulus-oocyte complexes of different competence during maturation, the expression of PGE2 and PGF2a receptor genes was either not detectable or was detected at low levels in oocytes.
Thesagro:	Bovinocultura Reprodução Animal Embriogénese Ovulo Maturação Cultura In Vitro Prostaglandina
NAL Thesaurus:	Cattle Animal reproduction Embryogenesis Oocytes In vitro studies Prostaglandins
Keywords:	Oócito Maturation E2 F2a
ISSN:	0739-7240
DOI:	https://doi.org/10.1016/j.domaniend.2020.106447
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CPAF-RO)