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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 Am+J+Transl+Res
2016 ; 8
(10
): 4160-4171
Nephropedia Template TP
gab.com Text
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English Wikipedia
AMPK-mediated cardioprotection of atorvastatin relates to the reduction of
apoptosis and activation of autophagy in infarcted rat hearts
#MMPMID27830000
Li Q
; Dong QT
; Yang YJ
; Tian XQ
; Jin C
; Huang PS
; Jiang LP
; Chen GH
Am J Transl Res
2016[]; 8
(10
): 4160-4171
PMID27830000
show ga
Atorvastatin (ATV) has an important pro-survival role in cardiomyocytes after
acute myocardial infarction (AMI). The objectives of this study were to: 1)
determine whether ATV could affect autophagy of cardiomyocytes via the
AMP-activated protein kinase (AMPK)/mammalian target of rapamycin (mTOR) pathway,
and 2) investigate the balance between autophagy and apoptosis pathways. Male
Wistar rats (n = 100) were randomly divided into sham, control, ATV, Compound C,
and ATV+ Compound C groups. In this AMI model, drug treatments were administered
for 1 week before induction of MI by surgical ligation, and measurements were
taken 1 and 4 weeks after AMI induction. Transthoracic echocardiography showed
that the ejection fraction in the ATV group increased by 11.7% ± 6.83% over the
control group 4 weeks after AMI. The fibrosis, infarcted area, and inflammatory
level were determined by pathological and histological studies; these were found
to be decreased substantially with ATV treatment (P<0.05). The expression of
apoptotic, autophagic, and AMPK pathway proteins was detected by
immunohistochemical staining and western blotting, while expression of their
corresponding genes was measured with real-time polymerase chain reaction (PCR).
ATV treatment increased AMPK/mTOR activity and the expression of autophagic
protein LC3 in infarcted myocardium (P<0.05). The treatment also inhibited
induction of pro-apoptotic protein Bax. AMPK inhibitor Compound C reversed these
beneficial effects. In conclusion, ATV improves survival of cardiomyocytes and
decreases alterations in morphology and function of infarcted hearts by inducing
autophagy and inhibiting apoptosis through the activation of AMPK/mTOR pathway.