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Kisspeptin is the protein product of Kiss1 gene. In contrast to its fundamental role as GnRH Secretagogue and puberty initiation, its functions in extrahypothalmic tissues such as the testes remain unknown. The objective of this study was to investigate the potential local role of kisspeptin in the Leydig cell culture in goats. Five male Shiba goats were castrated to isolate Leydig cells from the testes. The isolated Leydig cells were then purified and cultured with different concentration of kisspeptin antagonist (0, 5, and 10 nmol; 0KPA, 5KPA, and 10KPA; respectively). After 12 h, 20 IU of hCG was added to some wells (0KPA + hCG, 5KPA + hCG, and 10KPA + hCG; respectively); other wells did not receive hCG (0KPA + Con, 5KPA + Con, and 10KPA + Con; respectively). Media of Leydig cell culture was harvested at 2, 6, 12, and 24 h after addition of hCG for testosterone (T) and estradiol (E2) assays. The contents of some non KPA treated wells (0KPA + Con and 0KPA + hCG wells) were collected and stored at -80 C for further identification the expression of mRNA encoding Kiss1 and its receptor (GPR54) using real time PCR. Results revealed high expressions of Kiss1/GPR54 mRNAs in the hCG treated (0KPA + hCG) wells compared to non-hCG treated ones (0KPA + Con). KPA significantly reduced the basal T production at 6 h incubation as well as hCG-induced T production in 2, 6, and 24 h incubation. Basal E2 concentrations were significantly lower in the KPA treated wells at 6, and 24 h likewise, KPA significantly attenuated induced E2 production at 12 h compared with its values in non KPA treated wells. In conclusion, kisspeptin antagonist significantly attenuated both basal and hCG-activated T and E2 production by purified Leydig cells in goats. Therefore, involvement of kisspeptin in the steroidogenic capability of Leydig cells is possible in goats.
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We tested whether G-coupled membrane estrogen receptor (GPER) and peroxisome proliferator activated receptor (PPAR) partnership exists and whether this interaction regulates mouse Leydig cell function...
Kisspeptin has been shown to stimulate prolactin secretion. We investigated whether kisspeptin acts through the Kiss1 receptor (Kiss1r) to regulate dopamine and prolactin. Initially, we evaluated prol...
CKLFSF is a protein family that serves as a functional bridge between chemokines and members of the transmembrane 4 superfamily (TM4SF). In the course of evolution, CKLFSF2 has evolved as two isoforms...
Decabromodiphenyl ether (BDE-209), a congener of Polybrominated diphenyl ethers (PBDEs), is used as flame retardant and affects thyroid homeostasis. Thyroid hormones (THs) play crucial role in Leydig ...
This study aimed to investigate the effect of pre- and/or post-natal supplementation of a dry whole cell algae (DHA-Gold) to goat kids, on in vitro methane (CH4) production, animal growth and rumen mo...
Induction of insulin secretion by kisspeptin is observed in mouse, pig, rat, and human islets in vitro and in rats, mice and monkeys in vivo, but its mechanism is not fully clear. The pres...
The specific objective of this study was to investigate the sensitivity of Kisspeptin receptor 1 (KISS1R) by determining the responsiveness of GnRH neuron to kisspeptin administration acro...
The goal of this project is to explore the use of exogenous pulsatile kisspeptin as a therapeutic alternative for patients with hyperprolactinemia who are intolerant to current therapies.
This study examines how a naturally occurring peptide called Kisspeptin might regulate blood sugar and insulin levels.
The investigators are seeking subjects for a study of the role of kisspeptin in the reproductive system. Kisspeptin is a naturally occuring hormone in humans that stimulates the production...
Diseases of the domestic or wild goat of the genus Capra.
G protein coupled receptors for the C-terminally amidated peptide of KISSPEPTIN-1. KISS1R plays an essential role in sexual development during puberty through its regulation of GONADOTROPIN-released hormones.
Gonadal interstitial or stromal cell neoplasm composed of only LEYDIG CELLS. These tumors may produce one or more of the steroid hormones such as ANDROGENS; ESTROGENS; and CORTICOSTEROIDS. Clinical symptoms include testicular swelling, GYNECOMASTIA, sexual precocity in children, or virilization (VIRILISM) in females.
A sex cord-gonadal stromal tumor consists of LEYDIG CELLS; SERTOLI CELLS; and FIBROBLASTS in varying proportions and degree of differentiation. Most such tumors produce ANDROGENS in the Leydig cells, formerly known as androblastoma or arrhenoblastoma. Androblastomas occur in the TESTIS or the OVARY causing precocious masculinization in the males, and defeminization, or virilization (VIRILISM) in the females. In some cases, the Sertoli cells produce ESTROGENS.
An effect usually, but not necessarily, beneficial that is attributable to an expectation that the regimen will have an effect, i.e., the effect is due to the power of suggestion.
Within medicine, nutrition (the study of food and the effect of its components on the body) has many different roles. Appropriate nutrition can help prevent certain diseases, or treat others. In critically ill patients, artificial feeding by tubes need t...
Bioinformatics is the application of computer software and hardware to the management of biological data to create useful information. Computers are used to gather, store, analyze and integrate biological and genetic information which can then be applied...