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We are analyzing https://link.springer.com/article/10.1007/s00395-007-0691-y.

Title:
Metformin protects the ischemic heart by the Akt-mediated inhibition of mitochondrial permeability transition pore opening | Basic Research in Cardiology
Description:
In the majority of studies, metformin has been demonstrated to cardioprotect diabetic patients, the mechanism of which is unclear. We hypothesized that metformin cardioprotects the ischemic heart through the Akt-mediated inhibition of mitochondrial permeability transition pore (mPTP) opening. Isolated perfused hearts from normoglycemic Wistar or from diabetic Goto-Kakizaki (GK) rats (N â‰„ 6/group) were subjected to 35 min ischemia and 120 min of reperfusion. Metformin (50 Â”mol/l) was added for 15 min at reperfusion, alone or with LY294002 (15 Â”mol/l), a PI3K inhibitor. Infarct size and Akt phosphorylation were measured. Furthermore, the effect of metformin on mPTP opening in adult cardiomyocytes isolated from both strains was determined. Metformin reduced infarct size in both Wistar (35 Â± 2.7% metformin vs. 62 Â± 3.0% control: P < 0.05) and GK hearts (43 Â± 4.7% metformin vs. 60 Â± 3.8% control: P < 0.05). This protection was accompanied by a significant increase in Akt phosphorylation. LY294002 abolished the metformin-induced Akt phosphorylation and the infarct-limiting effect of metformin in Wistar (61 Â± 6.7% metformin + LY294002 vs. 35 Â± 2.7% metformin: P < 0.05) and GK rats (56 Â± 5.7% metformin + LY294002 vs. 43 Â± 4.7% metformin: P < 0.05). In addition, metformin significantly inhibited mPTP opening and subsequent rigor contracture in both Wistar and GK cardiomyocytes subjected to oxidative stress, in a LY-sensitive manner. We report that metformin given at the time of reperfusion reduces myocardial infarct size in both the non-diabetic and diabetic heart and this protective effect is mediated through PI3K and is associated with Akt phosphorylation. Furthermore, cardioprotection appears to be executed through a PI3K-mediated inhibition of mPTP opening. These findings may explain in part the cardioprotective properties of metformin observed in clinical studies of diabetic patients.
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28 years and 1 months (reg. 1997-05-29).

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  • Education
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What CMS is link.springer.com built with?

Custom-built

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What is the average monthly size of link.springer.com audience?

🌠 Phenomenal Traffic: 5M - 10M visitors per month


Based on our best estimate, this website will receive around 7,625,932 visitors per month in the current month.

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How Does Link.springer.com Make Money? {💾}

The income method remains a mystery to us.

Earning money isn't the goal of every website; some are designed to offer support or promote social causes. People have different reasons for creating websites. This might be one such reason. Link.springer.com might be plotting its profit, but the way they're doing it isn't detectable yet.

Keywords {🔍}

article, google, scholar, pubmed, cas, metformin, diabetes, mitochondrial, permeability, transition, heart, pore, reperfusion, yellon, res, opening, hausenloy, cell, diabetic, coronary, cardiovasc, death, research, ischemic, inhibition, patients, rats, phosphorylation, effect, myocardial, kinase, physiol, privacy, cookies, content, basic, derek, mocanu, hearts, akt, complex, biochem, cardiol, preconditioning, rat, information, publish, search, protects, davidson,

Topics {✒}

amp-activated protein kinase reactive oxygen species month download article/chapter post-infarct ventricular remodeling q-wave myocardial infarction ros production induced malonyl-coa levels due streptozotocin-induced diabetic rats intensive blood-glucose control article basic research goto-kakizaki diabetic rat mitochondrial permeability transition permeability transition pore permeability pore transition mitochondrial transition pore metformin-induced akt phosphorylation full article pdf reoxygenation-induced hypercontracture prior myocardial infarction pi 3-kinase regulates privacy choices/manage cookies coronary bypass surgery cardioprotective pi3k–akt signaling myocardial infarct size insulin protects cardiomyocytes adult rat myocytes hatter cardiovascular institute promotes mitochondrial biogenesis mitochondrial respiratory chain mediating cell death reduced calcium uptake acute coronary syndromes diabetic goto-kakizaki mitochondrial oxidative stress adult cardiomyocytes isolated acetyl-coa carboxylase de leiris jd van de wf pathway links closure intracellular ca2+ transients coronary heart disease reperfused rat heart de oliveira european economic area subsequent rigor contracture ly-sensitive manner reverse-electron flux common mechanism contributing directing bax translocation fatty acid oxidation

Questions {❓}

  • Brunmair B, Staniek K, Gras F, Scharf N, Althaym A, Clara R, Roden M, Gnaiger E, Nohl H, Waldhausl W, Furnsinn C (2004) Thiazolidinediones, like metformin, inhibit respiratory complex I: a common mechanism contributing to their antidiabetic actions?
  • Hausenloy DJ, Maddock HL, Baxter GF, Yellon DM (2002) Inhibiting mitochondrial permeability transition pore opening: a new paradigm for myocardial preconditioning?
  • Mensah K, Mocanu MM, Yellon DM (2005) Failure to protect the myocardium against ischemia/reperfusion injury after chronic atorvastatin treatment is recaptured by acute atorvastatin treatment: a potential role for phosphatase and tensin homolog deleted on chromosome ten?

Schema {đŸ—ș}

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         headline:Metformin protects the ischemic heart by the Akt-mediated inhibition of mitochondrial permeability transition pore opening
         description:In the majority of studies, metformin has been demonstrated to cardioprotect diabetic patients, the mechanism of which is unclear. We hypothesized that metformin cardioprotects the ischemic heart through the Akt-mediated inhibition of mitochondrial permeability transition pore (mPTP) opening. Isolated perfused hearts from normoglycemic Wistar or from diabetic Goto-Kakizaki (GK) rats (N ≄ 6/group) were subjected to 35 min ischemia and 120 min of reperfusion. Metformin (50 ”mol/l) was added for 15 min at reperfusion, alone or with LY294002 (15 ”mol/l), a PI3K inhibitor. Infarct size and Akt phosphorylation were measured. Furthermore, the effect of metformin on mPTP opening in adult cardiomyocytes isolated from both strains was determined. Metformin reduced infarct size in both Wistar (35 ± 2.7% metformin vs. 62 ± 3.0% control: P < 0.05) and GK hearts (43 ± 4.7% metformin vs. 60 ± 3.8% control: P < 0.05). This protection was accompanied by a significant increase in Akt phosphorylation. LY294002 abolished the metformin-induced Akt phosphorylation and the infarct-limiting effect of metformin in Wistar (61 ± 6.7% metformin + LY294002 vs. 35 ± 2.7% metformin: P < 0.05) and GK rats (56 ± 5.7% metformin + LY294002 vs. 43 ± 4.7% metformin: P < 0.05). In addition, metformin significantly inhibited mPTP opening and subsequent rigor contracture in both Wistar and GK cardiomyocytes subjected to oxidative stress, in a LY-sensitive manner. We report that metformin given at the time of reperfusion reduces myocardial infarct size in both the non-diabetic and diabetic heart and this protective effect is mediated through PI3K and is associated with Akt phosphorylation. Furthermore, cardioprotection appears to be executed through a PI3K-mediated inhibition of mPTP opening. These findings may explain in part the cardioprotective properties of metformin observed in clinical studies of diabetic patients.
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            infarction
            reperfusion
            signal transduction
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      headline:Metformin protects the ischemic heart by the Akt-mediated inhibition of mitochondrial permeability transition pore opening
      description:In the majority of studies, metformin has been demonstrated to cardioprotect diabetic patients, the mechanism of which is unclear. We hypothesized that metformin cardioprotects the ischemic heart through the Akt-mediated inhibition of mitochondrial permeability transition pore (mPTP) opening. Isolated perfused hearts from normoglycemic Wistar or from diabetic Goto-Kakizaki (GK) rats (N ≄ 6/group) were subjected to 35 min ischemia and 120 min of reperfusion. Metformin (50 ”mol/l) was added for 15 min at reperfusion, alone or with LY294002 (15 ”mol/l), a PI3K inhibitor. Infarct size and Akt phosphorylation were measured. Furthermore, the effect of metformin on mPTP opening in adult cardiomyocytes isolated from both strains was determined. Metformin reduced infarct size in both Wistar (35 ± 2.7% metformin vs. 62 ± 3.0% control: P < 0.05) and GK hearts (43 ± 4.7% metformin vs. 60 ± 3.8% control: P < 0.05). This protection was accompanied by a significant increase in Akt phosphorylation. LY294002 abolished the metformin-induced Akt phosphorylation and the infarct-limiting effect of metformin in Wistar (61 ± 6.7% metformin + LY294002 vs. 35 ± 2.7% metformin: P < 0.05) and GK rats (56 ± 5.7% metformin + LY294002 vs. 43 ± 4.7% metformin: P < 0.05). In addition, metformin significantly inhibited mPTP opening and subsequent rigor contracture in both Wistar and GK cardiomyocytes subjected to oxidative stress, in a LY-sensitive manner. We report that metformin given at the time of reperfusion reduces myocardial infarct size in both the non-diabetic and diabetic heart and this protective effect is mediated through PI3K and is associated with Akt phosphorylation. Furthermore, cardioprotection appears to be executed through a PI3K-mediated inhibition of mPTP opening. These findings may explain in part the cardioprotective properties of metformin observed in clinical studies of diabetic patients.
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               name:Dept. of Pharmacological Research I, Novo Nordisk, Denmark
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      name:Abigail M. Wynne
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            name:University College London Hospitals
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      name:Mihaela M. Mocanu
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            name:University College London Hospitals
            address:
               name:The Hatter Cardiovascular Institute, University College London Hospitals, London, UK
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      name:Derek M. Yellon
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            name:University College London Hospitals
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      name:Dept. of Pharmacological Research I, Novo Nordisk, Denmark
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      name:The Hatter Cardiovascular Institute, University College London Hospitals, London, UK
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