Oligopeptide hormones are involved in cell-cell interaction during embryonal implantation and neuropeptide Y (NPY) is expressed in the human placenta and decidual cells in the third trimester of pregnancy. However, there is no report regarding the intrauterine localisation and the functions of NPY during the peri-implantation period. In the present study, the spatiotemporal changes in NPY expression in the murine uterus during the peri-implantation period were investigated using reverse transcription-polymerase chain reaction (RT-PCR), quantitative RT-PCR and immunohistochemical techniques, as were the effects of sex steroids on NPY mRNA expression in primary cultured murine uterine epithelial cells. Neuropeptide Y mRNA was increased in the pregnant murine uterus, as well as in the pseudopregnant murine uterus, during the peri-implantation period. Immunohistochemical analysis revealed increases in NPY expression in luminal and glandular epithelial cells and decidualised stromal cells. Neuropeptide Y mRNA expression was strongly induced in cultured epithelial cells in response to sex steroids. The data suggest that NPY is involved in cell-cell interactions during embryonic implantation.
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http://dx.doi.org/10.10371/RD02088 | DOI Listing |
FASEB J
January 2025
Department of Obstetrics, Gynecology and Reproductive Health, Rutgers Biomedical and Health Sciences, Newark, New Jersey, USA.
At the maternal-fetal interface, tightly regulated levels of retinoic acid (RA), the physiologically active metabolite of vitamin A, are required for embryo implantation and pregnancy success. Herein, we utilize mouse models, primary human cells, and pharmacological tools to demonstrate how depletion of RA signaling via RA receptor (RAR) disrupts implantation and progression of early pregnancy. To inhibit RAR signaling during early pregnancy, BMS493, an inverse pan-RAR agonist that prevents RA-induced differentiation, was administered to pregnant mice during the peri-implantation period.
View Article and Find Full Text PDFHum Reprod Update
December 2024
C.S. Mott Center for Human Growth and Development, Wayne State University, Detroit, MI, USA.
Background: Successful implantation is a critical step for embryo survival. The major losses in natural and assisted human reproduction appeared to occur during the peri-implantation period. Because of ethical constraints, the fascinating maternal-fetal crosstalk during human implantation is difficult to study and thus, the possibility for clinical intervention is still limited.
View Article and Find Full Text PDFBMC Genomics
December 2024
Department of Animal Anatomy and Physiology, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland.
Background: The myometrium is involved in many processes during pregnancy and the estrous/menstrual cycle. Peroxisome proliferator-activated receptors (PPARs) can be regulators of the processes occurring in the myometrium. In the present study, we determined the global transcriptome profile of the porcine myometrium during the peri-implantation period and the late luteal phase of the estrous cycle.
View Article and Find Full Text PDFAnimals (Basel)
November 2024
School of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China.
Heat stress (HS) is a significant factor that adversely affects the health, welfare, and productivity of domestic animals, particularly impacting embryo implantation rates. However, the effects of HS on endometrial function during the peri-implantation period in Hainan black goats remain unclear. This study explores the influence of HS on the endometrium of these goats.
View Article and Find Full Text PDFMinerva Obstet Gynecol
December 2024
Unit of Obstetrics and Gynecology, AOU Policlinico di Modena, University of Modena and Reggio Emilia, Modena, Italy.
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