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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Nat+Commun
2017 ; 8
(1
): 598
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Cross-talk between miR-471-5p and autophagy component proteins regulates
LC3-associated phagocytosis (LAP) of apoptotic germ cells
#MMPMID28928467
Panneerdoss S
; Viswanadhapalli S
; Abdelfattah N
; Onyeagucha BC
; Timilsina S
; Mohammad TA
; Chen Y
; Drake M
; Vuori K
; Kumar TR
; Rao MK
Nat Commun
2017[Sep]; 8
(1
): 598
PMID28928467
show ga
Phagocytic clearance of apoptotic germ cells by Sertoli cells is vital for germ
cell development and differentiation. Here, using a tissue-specific miRNA
transgenic mouse model, we show that interaction between miR-471-5p and autophagy
member proteins regulates clearance of apoptotic germ cells via LC3-associated
phagocytosis (LAP). Transgenic mice expressing miR-471-5p in Sertoli cells show
increased germ cell apoptosis and compromised male fertility. Those effects are
due to defective engulfment and impaired LAP-mediated clearance of apoptotic germ
cells as miR-471-5p transgenic mice show lower levels of Dock180, LC3, Atg12,
Becn1, Rab5 and Rubicon in Sertoli cells. Our results reveal that Dock180
interacts with autophagy member proteins to constitute a functional LC3-dependent
phagocytic complex. We find that androgen regulates Sertoli cell phagocytosis by
controlling expression of miR-471-5p and its target proteins. These findings
suggest that recruitment of autophagy machinery is essential for efficient
clearance of apoptotic germ cells by Sertoli cells using LAP.Although phagocytic
clearance of apoptotic germ cells by Sertoli cells is essential for
spermatogenesis, little of the mechanism is known. Here the authors show that
Sertoli cells employ LC3-associated phagocytosis (LAP) by recruiting autophagy
member proteins to clear apoptotic germ cells.