Abstract
A key pathological event during cerebral ischemia is the excitotoxic release of glutamate. We have shown previously that alpha-melanocyte-stimulating hormone (alpha-MSH) enhances the hypothermia induced by kainic acid. We have investigated the effects of systemic administration of alpha-MSH on four-vessel occlusion forebrain ischemia on core temperature (CT) and brain temperature (BT), respectively. After 10 min cerebral ischemia, BT was lower in alpha-MSH- than in saline-injected animals. After 10 min reperfusion, both CT and BT were lower than the corresponding pre-ischemic levels after injection of alpha-MSH. alpha-MSH did not influence CT or BT in sham-operated rats. The alpha-MSH-induced hypothermia and its potentiation of reduction in BT during global cerebral ischemia, may contribute to neuroprotective effects of alpha-MSH.
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