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Int. J. Mol. Sci. 2012, 13(6), 7694-7709; doi:10.3390/ijms13067694
Article

The Role of PPARα in Metformin-Induced Attenuation of Mitochondrial Dysfunction in Acute Cardiac Ischemia/Reperfusion in Rats

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Received: 9 May 2012; in revised form: 31 May 2012 / Accepted: 18 June 2012 / Published: 21 June 2012
(This article belongs to the Section Molecular Pathology)
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Abstract: Metformin, an anti-diabetic drug, exerts cardioprotection against ischemia-reperfusion (IR) through the activation of AMPK. However, the molecular mechanisms underlying these beneficial effects remain elusive. In this study, we examined the role of PPARα in mediating cardioprotective effects of metformin on mitochondria. Hearts of male Sprague-Dawley rats perfused by Langendorff were subjected to IR in the presence or absence of metformin and the PPARα inhibitor, GW6471. IR reduced cardiac function and compromised the structural integrity of cardiac cells evidenced by increased LDH release from the hearts. In addition, IR induced mitochondrial dysfunction as evidenced by reduced respiration and increased mitochondrial permeability transition pore (PTP) opening. However, metformin-treated hearts demonstrated improved post-ischemic recovery of cardiac function and reduced cell death that were associated with increased state 3 respiration at complexes I and II (by 27% and 32%, respectively, both p < 0.05) and decreased PTP opening (by 27%, p < 0.05) compared to untreated hearts. The protective effects of metformin on cardiac function and mitochondria were blocked by GW6471. Thus, our results demonstrate that inhibition of PPARα attenuates the beneficial effects of metformin on mitochondria in acute IR.
Keywords: heart; ischemia/reperfusion; mitochondria; metformin; AMPK; PPARα heart; ischemia/reperfusion; mitochondria; metformin; AMPK; PPARα
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Barreto-Torres, G.; Parodi-Rullán, R.; Javadov, S. The Role of PPARα in Metformin-Induced Attenuation of Mitochondrial Dysfunction in Acute Cardiac Ischemia/Reperfusion in Rats. Int. J. Mol. Sci. 2012, 13, 7694-7709.

AMA Style

Barreto-Torres G, Parodi-Rullán R, Javadov S. The Role of PPARα in Metformin-Induced Attenuation of Mitochondrial Dysfunction in Acute Cardiac Ischemia/Reperfusion in Rats. International Journal of Molecular Sciences. 2012; 13(6):7694-7709.

Chicago/Turabian Style

Barreto-Torres, Giselle; Parodi-Rullán, Rebecca; Javadov, Sabzali. 2012. "The Role of PPARα in Metformin-Induced Attenuation of Mitochondrial Dysfunction in Acute Cardiac Ischemia/Reperfusion in Rats." Int. J. Mol. Sci. 13, no. 6: 7694-7709.


Int. J. Mol. Sci. EISSN 1422-0067 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert