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2016 ; 59
(ä): 99-109
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Planar cell polarity (PCP) proteins and spermatogenesis
#MMPMID27108805
Chen H
; Cheng CY
Semin Cell Dev Biol
2016[Nov]; 59
(ä): 99-109
PMID27108805
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In adult mammalian testes, spermatogenesis is comprised of several discrete
cellular events that work in tandem to support the transformation and
differentiation of diploid spermatogonia to haploid spermatids in the
seminiferous epithelium during the seminiferous epithelial cycle. These include:
self-renewal of spermatogonial stem cells via mitosis and their transformation
into differentiated spermatogonia, meiosis I/II, spermiogenesis and the release
of sperms at spermiation. Studies have shown that these cellular events are under
precise and coordinated controls of multiple proteins and signaling pathways.
These events are also regulated by polarity proteins that are known to confer
classical apico-basal (A/B) polarity in other epithelia. Furthermore, spermatid
development is likely supported by planar cell polarity (PCP) proteins since
polarized spermatids are aligned across the plane of seminiferous epithelium in
an orderly fashion, analogous to hair cells in the cochlea of the inner ear.
Thus, the maximal number of spermatids can be packed and supported by a fixed
population of differentiated Sertoli cells in the limited space of the
seminiferous epithelium in adult testes. In this review, we briefly summarize
recent findings regarding the role of PCP proteins in the testis. This
information should be helpful in future studies to better understand the role of
PCP proteins in spermatogenesis.