SphK-produced S1P in somatic cells is indispensable for LH-EGFR signaling-induced mouse oocyte maturation.
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Journal:Cell Death & Disease
Place of Publication:UK
Abstract:Germ cell division and differentiation require intimate contact and interaction with the surrounding somatic cells. Luteinizing hormone (LH) triggers epidermal growth factor (EGF)-like growth factors to promote oocyte maturation and developmental competence by activating EGF receptor (EGFR) in somatic cells. Here, we showed that LH-EGFR signaling-activated sphingosine kinases (SphK) in somatic cells. The activation of EGFR by EGF increased S1P and calcium levels in cumulus-oocyte complexes (COCs), and decreased the binding affinity of natriuretic peptide receptor 2 (NPR2) for natriuretic peptide type C (NPPC) to release the cGMP-mediated meiotic arrest. These functions of EGF were blocked by the SphK inhibitor SKI-II, which could be reversed by the addition of S1P. S1P also activated the Akt/mTOR cascade reaction in oocytes and promoted targeting protein for Xklp2 (TPX2) accumulation and oocyte developmental competence. Specifically depleting Sphk1/2 in somatic cells reduced S1P levels and impaired oocyte meiotic maturation and developmental competence, resulting in complete female infertility. Collectively, SphK-produced S1P in somatic cells serves as a functional transmitter of LH-EGFR signaling from somatic cells to oocytes: acting on somatic cells to induce oocyte meiotic maturation, and acting on oocytes to improve oocyte developmental competence.
All the Authors:Yanying Cui,FuXin Huang,Xiaodan Zhang,Yanli Sun,Tiantian Hao,Zhijuan Wang,Wei Xia
First Author:Feifei Yuan,Xiaoqiong Hao
Indexed by:Research Article
Correspondence Author:Youqiang Su,Meijia Zhang
Document Code:10.1038/s41419-022-05415-2
Volume:13
Issue:11
Page Number:963
ISSN No.:2041-4889
Translation or Not:no
Date of Publication:2022-11-17
Date of Publication:2022-11-17
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