Study summary · research use only
Kisspeptin modulates fertilization capacity of mouse spermatozoa
Plain-language summary
Paraphrased from the published abstract below — not a verdict on whether anything works.
In this study using imprinting control region mice, the authors investigated expression and function of kisspeptin and its receptor KISS1R in reproductive tissues. The abstract reports kisspeptin and KISS1R were localized primarily in Leydig cells and seminiferous tubules respectively, with KISS1R in the acrosomal region of spermatids and mature spermatozoa, and kisspeptin (but not KISS1R) in the cumulus-oocyte complex and oviductal epithelium. Sperm intracellular calcium concentrations increased after treatment with kisspeptin 10, and in vitro fertilization rates decreased after treating sperm with the kisspeptin antagonist peptide 234. The authors suggest kisspeptin and KISS1R could be involved in the fertilization process.
Abstract
Kisspeptin acts as an upstream regulator of the hypothalamus-pituitary-gonad axis, which is one of the main regulatory systems for mammalian reproduction. Kiss1 and its receptor Kiss1r (also known as G protein-coupled receptor 54 (Gpr54)) are expressed in various organs, but their functions are not well understood. The purpose of this study was to investigate the expression profiles and functions of kisspeptin and KISS1R in the reproductive tissues of imprinting control region mice. To identify the expression pattern and location of kisspeptin and KISS1R in gonads, testes and ovarian tissues were examined by immunohistochemical or immunofluorescent staining. Kisspeptin and KISS1R were expressed primarily in Leydig cells and seminiferous tubules respectively. KISS1R was specifically localized in the acrosomal region of spermatids and mature spermatozoa. Kisspeptin, but not KISS1R, was expressed in the cumulus-oocyte complex and oviductal epithelium of ovarian and oviductal tissues. The sperm intracellular calcium concentrations significantly increased in response to treatment with kisspeptin 10 in Fluo-4-loaded sperm. The IVF rates decreased after treatment of sperm with the kisspeptin antagonist peptide 234. These results suggest that kisspeptin and KISS1R might be involved in the fertilization process in the female reproductive tract. In summary, this study indicates that kisspeptin and KISS1R are expressed in female and male gametes, respectively, and in mouse reproductive tissues. These data strongly suggest that the kisspeptin system could regulate mammalian fertilization and reproduction.
pepmg summarizes the peer-reviewed literature and links to every source — it sells nothing, ships nothing, and gives no medical, dosing, or human-use guidance. Don't just trust this summary: follow the citation to its source and read it yourself. Research use only.