PMID- 32339963 OWN - NLM STAT- MEDLINE DCOM- 20210329 LR - 20210329 IS - 1879-3231 (Electronic) IS - 0093-691X (Linking) VI - 152 DP - 2020 Aug TI - Kisspeptin/GnRH1 system in Leydig cells of horse (Equus caballus): Presence and function. PG - 1-7 LID - S0093-691X(20)30225-9 [pii] LID - 10.1016/j.theriogenology.2020.04.006 [doi] AB - The objectives of this study were to evaluate in horse testes the expression of kisspeptin (KiSS) and GnRH1 neuropeptides and their cognate receptors, KiSS1R and GnRH1R, as well as their action on testosterone, GnRH1, prostaglandin F2alpha (PGF2alpha), and PGE2 synthesis and cyclooxygenase 1 (COX1) and COX2 activity by Leydig cells in vitro. Testes were obtained from 9 sexually mature horses by surgical castration. Immunohistochemistry, evidenced the presence of KiSS, KiSS1R, GnRH, and GnRH1R in Leydig cells, whereas germinal and Sertoli cells were positive only for GnRH1. Transcripts for both neuropeptides and their cognate receptors were revealed in isolated Leydig cells by RT-PCR. Isolated and purified Leydig cells were in vitro cultured with agonists and antagonists of KiSS (KiSS-10 and KiSS-234, respectively) and GnRH1 (buserelin and antide, respectively). KiSS-10 and buserelin increased (P < 0.01) COX1 activity and testosterone and PGF2alpha basal secretion, while decreased (P < 0.01) that of PGE2. KiSS-10 and buserelin did not affect COX2 activity. GnRH1 basal production was increased (P < 0.01) by KiSS-10, but not by buserelin. Antide counteracted the KiSS and GnRH1 effects, whereas KiSS-234 influence only those of KiSS. Summarizing, the KiSS/GnRH1 system is present in horse Leydig cells and modulates their endocrine activity. In particular, the endocrine effects of KiSS are mediated by GnRH1, so suggesting that hypothalamic-like interaction between KiSS and GnRH1 occurs also in Leydig cells. CI - Copyright (c) 2020. Published by Elsevier Inc. FAU - Petrucci, Linda AU - Petrucci L AD - Dipartimento di Medicina Veterinaria, Universita di Perugia, 06126, Perugia, PG, Italy; Scuola di Bioscienze e Medicina Veterinaria, Universita di Camerino, 62032, Camerino, MC, Italy. FAU - Maranesi, Margherita AU - Maranesi M AD - Dipartimento di Medicina Veterinaria, Universita di Perugia, 06126, Perugia, PG, Italy. Electronic address: massimo.zerani@unipg.it. FAU - Verini Supplizi, Andrea AU - Verini Supplizi A AD - Dipartimento di Medicina Veterinaria, Universita di Perugia, 06126, Perugia, PG, Italy. FAU - Dall'Aglio, Cecilia AU - Dall'Aglio C AD - Dipartimento di Medicina Veterinaria, Universita di Perugia, 06126, Perugia, PG, Italy. FAU - Mandara, Maria Teresa AU - Mandara MT AD - Dipartimento di Medicina Veterinaria, Universita di Perugia, 06126, Perugia, PG, Italy. FAU - Quassinti, Luana AU - Quassinti L AD - Scuola di Scienze del Farmaco e dei Prodotti della Salute, Universita di Camerino, 62032, Camerino, MC, Italy. FAU - Bramucci, Massimo AU - Bramucci M AD - Scuola di Scienze del Farmaco e dei Prodotti della Salute, Universita di Camerino, 62032, Camerino, MC, Italy. FAU - Miano, Antonino AU - Miano A AD - Scuola di Bioscienze e Medicina Veterinaria, Universita di Camerino, 62032, Camerino, MC, Italy. FAU - Gobbetti, Anna AU - Gobbetti A AD - Scuola di Bioscienze e Medicina Veterinaria, Universita di Camerino, 62032, Camerino, MC, Italy. FAU - Catone, Giuseppe AU - Catone G AD - Scuola di Bioscienze e Medicina Veterinaria, Universita di Camerino, 62032, Camerino, MC, Italy; Dipartimento di Scienze Veterinarie, Universita di Messina, 98122, Messina, ME, Italy. FAU - Boiti, Cristiano AU - Boiti C AD - Dipartimento di Medicina Veterinaria, Universita di Perugia, 06126, Perugia, PG, Italy. FAU - Zerani, Massimo AU - Zerani M AD - Dipartimento di Medicina Veterinaria, Universita di Perugia, 06126, Perugia, PG, Italy; Scuola di Bioscienze e Medicina Veterinaria, Universita di Camerino, 62032, Camerino, MC, Italy. LA - eng PT - Journal Article DEP - 20200415 PL - United States TA - Theriogenology JT - Theriogenology JID - 0421510 RN - 0 (Kisspeptins) RN - 0 (Receptors, Kisspeptin-1) RN - 0 (Receptors, LHRH) RN - 33515-09-2 (Gonadotropin-Releasing Hormone) RN - EC 1.14.99.1 (Cyclooxygenase 1) RN - EC 1.14.99.1 (Cyclooxygenase 2) SB - IM MH - Animals MH - Cyclooxygenase 1/genetics/metabolism MH - Cyclooxygenase 2/genetics/metabolism MH - Gene Expression Regulation MH - Gonadotropin-Releasing Hormone/genetics/*metabolism MH - *Horses MH - Kisspeptins/genetics/*metabolism MH - Leydig Cells/*metabolism MH - Male MH - Receptors, Kisspeptin-1/genetics/*metabolism MH - Receptors, LHRH/genetics/*metabolism OTO - NOTNLM OT - GnRH OT - Horse OT - Kisspeptin OT - Leydig cell OT - Prostaglandins OT - Testosterone EDAT- 2020/04/28 06:00 MHDA- 2021/03/30 06:00 CRDT- 2020/04/28 06:00 PHST- 2019/05/22 00:00 [received] PHST- 2020/04/07 00:00 [revised] PHST- 2020/04/07 00:00 [accepted] PHST- 2020/04/28 06:00 [pubmed] PHST- 2021/03/30 06:00 [medline] PHST- 2020/04/28 06:00 [entrez] AID - S0093-691X(20)30225-9 [pii] AID - 10.1016/j.theriogenology.2020.04.006 [doi] PST - ppublish SO - Theriogenology. 2020 Aug;152:1-7. doi: 10.1016/j.theriogenology.2020.04.006. Epub 2020 Apr 15.