BACKGROUND We have recently demonstrated that remote ischemic preconditioning reduces ischemia-reperfusion injury in animal models. The mechanisms by which the remote ischemic preconditioning stimulus exerts its effect remain to be fully defined, and its effect on myocardial gene expression is unknown. We tested the hypothesis that remote ischemic preconditioning modifies myocardial gene expres...

Hyperlipidemia attenuates the cardioprotective effect of preconditioning via unknown mechanisms. We have previously reported that in normolipidemic rats preconditioning decreased ischemia-induced activation and release of myocardial matrix metalloproteinase-2 (MMP-2) into the coronary perfusate. Here we investigated whether hyperlipidemia interferes with the cardioprotective effect of precondit...

Preconditioning is an experimental strategy for reducing ischemic brain damage. There are reports that brief exposure of neurons to NMDA-receptor antagonists may be an adequate preconditioning stressor. We studied effects of preconditioning of the cerebellar granule cells (CGC) in primary culture by 30-minute exposure to NMDA receptor antagonists 0.5 μM MK-801 or 5 μM memantine. CGC were challe...

OBJECTIVE Beta cells of pancreatic islets are susceptible to functional deficits and damage by hypoxia. Here we aimed to characterize such effects and to test for and pharmacological means to alleviate a negative impact of hypoxia. METHODS AND DESIGN Rat and human pancreatic islets were subjected to 5.5 h of hypoxia after which functional and viability parameters were measured subsequent to t...

BACKGROUND The role of NO in the mechanism of preconditioning is not understood. Therefore, we studied the effect of preconditioning and subsequent ischemia/reperfusion on myocardial NO content in the presence of an NO synthase (NOS) inhibitor. METHODS AND RESULTS Isolated working rat hearts were subjected to preconditioning protocols of 3 intermittent periods of rapid pacing or no-flow ische...

background: the cardioprotective effect of ischemic preconditioning has been known for many years. since the temporary ischemia in the heart may cause lethal cardiac effects, the idea of creating ischemia in organs far from the heart such as limbs was raised as remote ischemic preconditioning (ripc). we hypothesized that the extension of ripc has more cardioprotective effect in patients undergo...

Hearse, David J., and Fiona J. Sutherland. Catecholamines and preconditioning: studies of contraction and function in isolated rat hearts. Am. J. Physiol. 277 (Heart Circ. Physiol. 46): H136–H143, 1999.—The aims of this study were to determine whether 1) like ischemic preconditioning, transient exposure to norepinephrine before ischemia exacerbates contracture during ischemia and 2) protection ...

Ischemic preconditioning describes the increased resistance to myocardial infarction that follows short sublethal periods of ischemia. After the ischemia that triggers preconditioning, there are 2 phases of protection: an early (short-lived) phase termed early or classic preconditioning1 and a late (more prolonged) phase termed late preconditioning or the second window of protection.2 The purpo...

Coles, James A., Jr., Daniel C. Sigg, and Paul A. Iaizzo. Role of -opioid receptor activation in pharmacological preconditioning of swine. Am J Physiol Heart Circ Physiol 284: H2091–H2099, 2003. First published January 23, 2003; 10.1152/ajpheart.00843.2002.—Pharmacological preconditioning with -opioid receptor agonists is proarrhythmic and exerts antipreconditioning effects in rats. In swine, i...

BACKGROUND Preconditioning with volatile anaesthetic agents induces tolerance to focal cerebral ischaemia, although the underlying mechanisms have not been clearly defined. The present study analyses whether TREK-1, a two-pore domain K(+) channel and target for volatile anaesthetics, plays a role in mediating neuroprotection by sevoflurane. METHODS Differentiated SH-SY5Y cells were preconditi...