https://transhumanist.ru/index.php?action=history&feed=atom&title=RARG 2026-06-13T14:48:15Z История изменений этой страницы в вики MediaWiki 1.43.6 https://transhumanist.ru/index.php?title=RARG&diff=5480&oldid=prev 2021-05-12T13:45:57Z

<p>Новая страница: «Retinoic acid receptor gamma (RAR-gamma) (Nuclear receptor subfamily 1 group B member 3) [NR1B3] ==Publications== {{medline-entry |title=Spermatogonia different...»</p> <p><b>Новая страница</b></p><div>Retinoic acid receptor gamma (RAR-gamma) (Nuclear receptor subfamily 1 group B member 3) [NR1B3]<br /> <br /> ==Publications==<br /> <br /> {{medline-entry<br /> |title=Spermatogonia differentiation requires retinoic acid receptor γ.<br /> |pubmed-url=https://pubmed.ncbi.nlm.nih.gov/22045663<br /> |abstract=Vitamin A is instrumental to mammalian reproduction. Its metabolite, retinoic acid (RA), acts in a hormone-like manner through binding to and activating three nuclear receptor isotypes, RA receptor (RAR)α ([[RARA]]), RARβ, and RARγ ([[RARG]]). Here, we show that 1) [[RARG]] is expressed by A aligned (A(al)) spermatogonia, as well as during the transition from A(al) to A(1) spermatogonia, which is known to require RA; and 2) ablation of Rarg, either in the whole mouse or specifically in spermatogonia, does not affect meiosis and spermiogenesis but impairs the A(al) to A(1) transition in the course of some of the seminiferous epithelium cycles. Upon ageing, this phenomenon yields seminiferous tubules containing only spermatogonia and Sertoli cells. Altogether, our findings indicate that [[RARG]] cell-autonomously transduces, in undifferentiated spermatogonia of adult testes, a RA signal critical for spermatogenesis. During the prepubertal spermatogenic wave, the loss of [[RARG]] function can however be compensated by [[RARA]], as indicated by the normal timing of appearance of meiotic cells in Rarg-null testes. Accordingly, [[RARG]]- and [[RARA]]-selective agonists are both able to stimulate Stra8 expression in wild-type prepubertal testes. Interestingly, inactivation of Rarg does not impair expression of the spermatogonia differentiation markers Kit and Stra8, contrary to vitamin A deficiency. This latter observation supports the notion that the RA-signaling pathway previously shown to operate in Sertoli cells also participates in spermatogonia differentiation.<br /> |mesh-terms=* Aging<br /> * Animals<br /> * Base Sequence<br /> * DNA Primers<br /> * Gene Expression Regulation, Developmental<br /> * Male<br /> * Meiosis<br /> * Mice<br /> * Mice, 129 Strain<br /> * Mice, Inbred C57BL<br /> * Mice, Knockout<br /> * Real-Time Polymerase Chain Reaction<br /> * Receptors, Retinoic Acid<br /> * Retinoic Acid Receptor alpha<br /> * Reverse Transcriptase Polymerase Chain Reaction<br /> * Signal Transduction<br /> * Spermatogenesis<br /> * Spermatogonia<br /> * Testis<br /> * Vitamin A Deficiency<br /> <br /> |full-text-url=https://sci-hub.do/10.1210/en.2011-1102<br /> }}</div>

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