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- W2019667072 abstract "Angiotensin II (Ang II) has been found to exert preconditioning (PC)-like effect in mammalian hearts. The present investigation reported for the first time a unique mitogen activated protein (MAP) kinase signalling in Ang II PC of the heart involving lipid rafts, which generated a survival signal by differentially associating MAP kinases with caveolin. A group of rat hearts was treated with Ang II in the absence or presence of NADPH oxidase inhibitor, apocynin or a cell permeable reactive oxygen species (ROS) scavenger, N-acetyl-cysteine (NAC). Ang II pre-treatment improved post-ischaemic ventricular recovery, myocardial infraction and decreased the number of cardiomyocyte apoptosis indicating PC effect of Ang II. Both apocynin and NAC abolished the PC ability of Ang II. In Ang II treated heart, there was a decreased association of p38MAPKbeta & extracellular-signal regulated kinase (ERK) 1/ 2 (anti-death signalling component) with caveolin while there was an increased association of p38MAPKalpha & Jun N-terminal kinase (JNK) (death signalling component) indicating reduced amount of death signal components and increased amount of anti-death signalling components being available to the Ang II treated heart to generate a survival signal, which was reversed with NAC or apocynin. The survival signal was also demonstrated by increased phosphorylation of serine/threonine-protein kinase B (AKT) and enhanced induction of expression of Bcl-2 during Ang II PC and its reversal with NAC & apocynin treated heart." @default.
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- W2019667072 date "2007-07-01" @default.
- W2019667072 modified "2023-10-15" @default.
- W2019667072 title "Caveolin and MAP kinase interaction in angiotensin II preconditioning of the myocardium" @default.
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- W2019667072 doi "https://doi.org/10.1111/j.1582-4934.2007.00067.x" @default.
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