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• W1556987023 abstract "1 The anti-inflammatory properties of annexin-1 peptides have been largely ascribed to their powerful antineutrophil actions in vivo. We have recently reported that the N-terminal fragment of annexin-1, Anx-1(2-26), preserves contractile function of cardiac muscle in vitro. The aim of the present study was to determine if Anx-1(2-26) elicits protective actions specifically on the cardiac myocyte (in the absence of neutrophils), using a model of metabolic inhibition to simulate ischaemia. 2 Metabolic inhibition of cardiac myocytes (4 h incubation at 37 degrees C in HEPES-containing buffer supplemented with 2-deoxy-D-glucose, D,L-lactic acid and pH adjusted to 6.5) followed by 2.5 h recovery in normal medium markedly increased creatine kinase (CK) and lactate dehydrogenase (LDH) levels by 179+/-39 and 26+/-7 IU L(-1) (both n=40, P<0.001), respectively. However, cellular injury was significantly decreased when Anx-1(2-26) (0.3 microM) was present during metabolic inhibition, CK by 74+/-10% and LDH by 71+/-6% (both n=31, P<0.001), respectively. 3 Boc 2 (10 microM), a nonselective formyl peptide receptor antagonist, present during metabolic inhibition, abolished the cardioprotective effect of Anx-1(2-26). 4 Addition of chelerythrine (10 microM), 5-hydroxydecanoate (500 microM) or SB202190 (1 microM) during metabolic inhibition also abolished Anx-1(2-26)-induced cardioprotection. 5 Cellular injury induced by metabolic inhibition was also largely prevented when myocytes were incubated with Anx-1(2-26) for 5 min with 10 min recovery prior to the insult, or when Anx-1(2-26) was present only during the recovery period following drug-free metabolic inhibition. 6 In conclusion, the annexin-1 peptide Anx-1(2-26) potently prevents cardiac myocyte injury induced by metabolic inhibition, an action that was dependent at least in part on the activation of the formyl peptide receptor family of G-protein-coupled receptors, protein kinase C, p38 mitogen-activated protein kinase and ATP-sensitive potassium channels." @default.
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• W1556987023 date "2005-06-01" @default.
• W1556987023 modified "2023-09-27" @default.
• W1556987023 title "Annexin-1 peptide Anx-1_2-26 protects adult rat cardiac myocytes from cellular injury induced by simulated ischaemia" @default.
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• W1556987023 doi "https://doi.org/10.1038/sj.bjp.0706211" @default.
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