Abstract:
:Recently, sex steroid membrane receptors garnered world-wide attention because they may be related to sex hormone-mediated unknown rapid non-genomic action that cannot be currently explained by their genomic action via nuclear receptors. Progesterone affects cell proliferation and survival via non-genomic effects. In this process, membrane progesterone receptors (mPRα, mPRβ, mPRγ, mPRδ, and mPRε) were identified as putative G protein-coupled receptors (GPCRs) for progesterone. However, the structure, intracellular signaling, and physiological functions of these progesterone receptors are still unclear. Here, we identify a molecular mechanism by which progesterone promotes neurite outgrowth through mPRβ (Paqr8) activation. Mouse mPRβ mRNA was specifically expressed in the central nervous system. It has an incomplete GPCR topology, presenting 6 transmembrane domains and did not exhibit typical GPCR signaling. Progesterone-dependent neurite outgrowth was exhibited by the promotion of ERK phosphorylation via mPRβ, but not via other progesterone receptors such as progesterone membrane receptor 1 (PGRMC-1) and nuclear progesterone receptor in nerve growth factor-induced neuronal PC12 cells. These findings provide new insights of regarding the non-genomic action of progesterone in the central nervous system.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Kasubuchi M,Watanabe K,Hirano K,Inoue D,Li X,Terasawa K,Konishi M,Itoh N,Kimura Idoi
10.1038/s41598-017-05423-9subject
Has Abstractpub_date
2017-07-12 00:00:00pages
5168issue
1issn
2045-2322pii
10.1038/s41598-017-05423-9journal_volume
7pub_type
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