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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
2016 ; 7
(ä): 10477
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p38? and ? promote heart hypertrophy by targeting the mTOR-inhibitory protein
DEPTOR for degradation
#MMPMID26795633
González-Terán B
; López JA
; Rodríguez E
; Leiva L
; Martínez-Martínez S
; Bernal JA
; Jiménez-Borreguero LJ
; Redondo JM
; Vazquez J
; Sabio G
Nat Commun
2016[Jan]; 7
(ä): 10477
PMID26795633
show ga
Disrupted organ growth leads to disease development. Hypertrophy underlies
postnatal heart growth and is triggered after stress, but the molecular
mechanisms involved in these processes are largely unknown. Here we show that
cardiac activation of p38? and p38? increases during postnatal development and by
hypertrophy-inducing stimuli. p38?/? promote cardiac hypertrophy by
phosphorylating the mTORC1 and mTORC2 inhibitor DEPTOR, which leads to its
degradation and mTOR activation. Hearts from mice lacking one or both kinases are
below normal size, have high levels of DEPTOR, low activity of the mTOR pathway
and reduced protein synthesis. The phenotype of p38?/?(-/-) mice is reverted by
overactivation of mTOR with amino acids, shRNA-mediated knockdown of Deptor, or
cardiomyocyte overexpression of active p38? and p38?. Moreover, in WT mice, heart
weight is reduced by cardiac overexpression of DEPTOR. Our results demonstrate
that p38?/? control heart growth by modulating mTOR pathway through DEPTOR
phosphorylation and subsequent degradation.