pyrrole/infarction

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A Conductive Polymer Hydrogel Supports Cell Electrical Signaling and Improves Cardiac Function After Implantation into Myocardial Infarct.

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BACKGROUND Efficient cardiac function requires synchronous ventricular contraction. After myocardial infarction, the nonconductive nature of scar tissue contributes to ventricular dysfunction by electrically uncoupling viable cardiomyocytes in the infarct region. Injection of a conductive

The ceiling effect of pharmacological postconditioning with the phytoestrogen genistein is reversed by the GSK3beta inhibitor SB 216763 [3-(2,4-dichlorophenyl)-4(1-methyl-1H-indol-3-yl)-1H-pyrrole-2,5-dione] through mitochondrial ATP-dependent potassium channel opening.

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In the present study, we investigated the efficacy of pharmacological postconditioning induced by 17beta-estradiol and the phytoestrogen, genistein, against myocardial infarction induced by increasing durations of coronary artery occlusion (CAO). Anesthetized rabbits underwent either 20-min

Synthesis and endothelin receptors binding affinity of new 1,3,5- substituted pyrrole-2-carboxylic acid derivatives.

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The interest of researchers for ligands of the endothelin receptors ETA and ETB is due to their extensive therapeutic potential. In particular, receptor antagonists are useful in a number of diseases such as pulmonary hypertension, acute myocardial infarction, congestive heart failure, renal

Cardioprotective effect of morphine and a blocker of glycogen synthase kinase 3 beta, SB216763 [3-(2,4-dichlorophenyl)-4(1-methyl-1H-indol-3-yl)-1H-pyrrole-2,5-dione], via inhibition of the mitochondrial permeability transition pore.

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Morphine has been shown to protect the myocardium against ischemia-reperfusion injury through inhibition of glycogen synthase kinase-3beta (GSK-3beta). Given that GSK-3beta is known to modulate the mitochondrial permeability transition pore (mPTP), we investigated the role of mPTP in the

Identification of a potent sodium hydrogen exchanger isoform 1 (NHE1) inhibitor with a suitable profile for chronic dosing and demonstrated cardioprotective effects in a preclinical model of myocardial infarction in the rat.

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Sodium-hydrogen exchanger isoform 1 (NHE1) is a ubiquitously expressed transmembrane ion channel responsible for intracellular pH regulation. During myocardial ischemia, low pH activates NHE1 and causes increased intracellular calcium levels and aberrant cellular processes, leading to myocardial

N-hydroxy-pyrroline modification of verapamil exhibits antioxidant protection of the heart against ischemia/reperfusion-induced cardiac dysfunction without compromising its calcium antagonistic activity.

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Any clinical intervention (e.g., coronary angioplasty, thrombolysis) used to reintroduce blood flow to an ischemic region of the myocardium is accompanied by a complex enzymatic cascade of reactions resulting in severe injury to the heart, termed myocardial ischemia/reperfusion (I/R) injury. In this

N6-(3-iodobenzyl)-adenosine-5'-N-methylcarboxamide confers cardioprotection at reperfusion by inhibiting mitochondrial permeability transition pore opening via glycogen synthase kinase 3 beta.

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Although the adenosine A(3) receptor agonist N(6)-(3-iodobenzyl)-adenosine-5'-N-methylcarboxamide (IB-MECA) has been reported to be cardioprotective at reperfusion, little is known about the mechanisms underlying the protection. We hypothesized that IB-MECA may protect the heart at reperfusion by

Cardioprotection of interleukin-2 is mediated via kappa-opioid receptors.

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We examined whether interleukin-2 (IL-2) protects the myocardium against injury induced by ischemia and reperfusion via the kappa-opioid receptor (OR). The cardioprotective effect of IL-2 was evaluated by measuring infarct size and lactate dehydrogenase (LDH) release in response to ischemia and

Diesterified nitrone rescues nitroso-redox levels and increases myocyte contraction via increased SR Ca(2+) handling.

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Nitric oxide (NO) and superoxide (O(2) (-)) are important cardiac signaling molecules that regulate myocyte contraction. For appropriate regulation, NO and O(2) (.-) must exist at defined levels. Unfortunately, the NO and O(2) (.-) levels are altered in many cardiomyopathies (heart failure,

Modulation of the cardioprotective effect of ischemic preconditioning in hyperlipidaemic rat heart.

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Ischemic preconditioning (IPC) produces cardioprotection by phosphorylation of glycogen synthaes kinase-3beta (GSK-3beta) that inhibits the opening of mitochondrial permeability transition pore (MPTP), and this cardioprotective action of IPC is attenuated by hyperlipidaemia. The present study

Development of cardiac troponin-I biosensor based on boron nitride quantum dots including molecularly imprinted polymer.

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The cardiac Troponin-I (cTnI) is one of the subunits of cardiac troponin complexes and a pivotal biochemical marker of acute myocardial infarction (AMI). Due to its myocardial specificity, cTnI is widely used for the diagnosis of AMI diseases. In this study, a novel imprinted biosensor approach

Paintable and Rapidly Bondable Conductive Hydrogels as Therapeutic Cardiac Patches.

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In recent years, cardiac patches have been developed for the treatment of myocardial infarction. However, the fixation approaches onto the tissue through suture or phototriggered reaction inevitably cause new tissue damage. Herein, a paintable hydrogel is constructed based on Fe3+ -triggered

The conductive function of biopolymer corrects myocardial scar conduction blockage and resynchronizes contraction to prevent heart failure

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Myocardial fibrosis, resulting from ischemic injury, increases tissue resistivity in the infarct area, which impedes heart synchronous electrical propagation. The uneven conduction between myocardium and fibrotic tissue leads to dys-synchronous contraction, which progresses towards ventricular

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