Publication: How does retinoic acid (RA) signaling pathway regulate spermatogenesis?
Authors
Zhang, Hua Zhe ; Hao, Shuang Li ; Yang, Wan Xi
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Publisher
Universidad de Murcia, Departamento de Biologia Celular e Histiologia
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DOI
https://doi.org/10.14670/HH-18-478
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info:eu-repo/semantics/article
Description
Abstract
Male sterility is a worldwide health problem
which has troubled many unfortunate families and
attracted widespread attention in the field of
reproduction. Retinoic acid (RA) is a metabolite of
vitamin A. Previous studies have shown that insufficient
intake of vitamin A can lead to male infertility.
Similarly, RA-deficiency can lead to abnormal
spermatogenesis in men. RA signaling is inseparable
from hormone stimulation, such as FSH, testosterone
and others. It can regulate spermatogenesis as well,
including the proliferation and differentiation of
spermatogonia, meiosis, spermiogenesis and
spermiation. To promote or inhibit spermatogenesis, RA
regulates Stra8, Kit, GDNF, BMP4 and other factors in
various pathways. At the self-renewal stage, RA inhibits
spermatogonia renewal by directly or indirectly
inhibiting DMRT, GDNF and Cyclin. At the stage of
differentiation and meiosis, RA controls SSC
differentiation through Kit induction and Nanos2
inhibition, and controls spermatogonia meiotic entry
through up- regulation of Stra8. At the stage of
spermiogenesis, RARα, as a key regulator, regulates
spermatogenesis by up regulating Stra8 while binding
with RA. Although RA plays an important role in all
stages of spermatogenesis, RA signaling is more
important in the early stage of spermatogonia (spg)
differentiation and spermatocyte (spc) meiosis.
According to the principle of RA signaling that regulates
spermatogenesis, we also speculate on the future clinical
application of RA, such as potential induction of SSC in
vitro, contraception and restoring spermatogenesis. This
paper reviews the regulatory pathways of RA, and
prospects the clinical applications of RA signaling in the
future.
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Citation
Histology and Histopathology Vol. 37, nĀŗ11 (2022)
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