Deprecated: Implicit conversion from float 213.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 213.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 213.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 213.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 213.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 213.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 213.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 247.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 247.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Warning: imagejpeg(C:\Inetpub\vhosts\kidney.de\httpdocs\phplern\25012168
.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 J+Am+Soc+Nephrol
2014 ; 25
(12
): 2800-11
Nephropedia Template TP
Hanatani S
; Izumiya Y
; Araki S
; Rokutanda T
; Kimura Y
; Walsh K
; Ogawa H
J Am Soc Nephrol
2014[Dec]; 25
(12
): 2800-11
PMID25012168
show ga
Muscle wasting is frequently observed in patients with kidney disease, and low
muscle strength is associated with poor outcomes in these patients. However,
little is known about the effects of skeletal muscle growth per se on kidney
diseases. In this study, we utilized a skeletal muscle-specific, inducible Akt1
transgenic (Akt1 TG) mouse model that promotes the growth of functional skeletal
muscle independent of exercise to investigate the effects of muscle growth on
kidney diseases. Seven days after Akt1 activation in skeletal muscle, renal
injury was induced by unilateral ureteral obstruction (UUO) in Akt1 TG and
wild-type (WT) control mice. The expression of atrogin-1, an atrophy-inducing
gene in skeletal muscle, was upregulated 7 days after UUO in WT mice but not in
Akt1 TG mice. UUO-induced renal interstitial fibrosis, tubular injury, apoptosis,
and increased expression of inflammatory, fibrosis-related, and adhesion molecule
genes were significantly diminished in Akt1 TG mice compared with WT mice. An
increase in the activating phosphorylation of eNOS in the kidney accompanied the
attenuation of renal damage by myogenic Akt1 activation. Treatment with the NOS
inhibitor L-NAME abolished the protective effect of skeletal muscle Akt
activation on obstructive kidney disease. In conclusion, Akt1-mediated muscle
growth reduces renal damage in a model of obstructive kidney disease. This
improvement appears to be mediated by an increase in eNOS signaling in the
kidney. Our data support the concept that loss of muscle mass during kidney
disease can contribute to renal failure, and maintaining muscle mass may improve
clinical outcome.