Abstract | OBJECTIVE: METHOD: Rats were divided into sham, I/R, I/R+3,4-dihydro-5-[4-(1-piperidinyl)butoxy]-1(2H)- isoquinolinone (DPQ, 10 mg/kg, i.p.), an inhibitor of PARP, I/R + DPQ + Akt inhibitor LY294002, 10 mg/kg (n = 12 each). Cardiac function, apoptosis of the cardiomyocytes were measured, myocardial expression of PARP, Akt, glycogen synthase kinase-3β (GSK-3β) and forkhead transcription factor FOXO3a were detected. RESULTS: (1) The expression of PARP were significantly upregulated in I/R group compared to sham group which was significantly attenuated in I/R + DPQ group (P < 0.05 vs. I/R group). (2)PARP inhibition significantly reduced cardiomyocyte apoptosis from (34.0 ± 6.2)% to (23.0 ± 3.8)% (P < 0.05). The LVDP, +dp/dt and -dp/dt were significantly higher in I/R + DPQ group compared to I/R group (all P < 0.05). (3) The expression of Akt, GSK-3β and FOXO3a were significantly upregulated in I/R + DPQ group compared to I/R group (P < 0.05) which were significantly attenuated in I/R + DPQ + LY294002 group compared to I/R + DPQ group (all P < 0.05). CONCLUSION: PARP activation contributes to myocardial I/R injury in rats by modulating Akt mediated signaling pathway.
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Authors | Zhao-feng Song |
Journal | Zhonghua xin xue guan bing za zhi
(Zhonghua Xin Xue Guan Bing Za Zhi)
Vol. 41
Issue 2
Pg. 156-60
(Feb 2013)
ISSN: 0253-3758 [Print] China |
PMID | 23710748
(Publication Type: English Abstract, Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
- Poly(ADP-ribose) Polymerase Inhibitors
- Poly(ADP-ribose) Polymerases
- Proto-Oncogene Proteins c-akt
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Topics |
- Animals
- Disease Models, Animal
- Female
- Myocardial Reperfusion Injury
(metabolism, physiopathology)
- Poly(ADP-ribose) Polymerase Inhibitors
- Poly(ADP-ribose) Polymerases
(physiology)
- Proto-Oncogene Proteins c-akt
(metabolism)
- Rats
- Rats, Sprague-Dawley
- Signal Transduction
(drug effects)
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