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• W2034501286 abstract "The effects of hypothermia on galanin concentrations and the relation between ischemic brain lesions, hypothermia and galanin concentrations in a transient and focal rat stroke model were investigated in order to elucidate whether hypothermia-induced alterations in galanin concentrations could constitute a part of the established neuroprotective effect of hypothermia. Female rats were allocated to normothermia (37 degrees C) or hypothermia (33 degrees C) treatments during a 60 min microclip middle cerebral artery occlusion. The ischemic lesions were visualized after observation periods of 2 or 7 days and the concentration of galanin measured by radioimmunoassay in extracts of punch biopsies from both the lesioned and the contralateral control hemisphere. Hypothermia-induced an overall increase in the concentrations of immunoreactive galanin (p<0.001). The elevated galanin levels were predominantly found in the non-ischemic control hemisphere, in the hippocampus, thalamus and the posterior part of parietal cortex. The galanin concentrations were lower in the ischemic hemisphere in both the normo- and hypothermic animals compared to the corresponding contra lateral intact hemisphere (p=0.049). The factor of time, 2 respectively 7 days, did not show any significant difference regarding the galanin concentrations (p=0.844). Multivariate analyses of variance revealed significant effect of ischemia on the size of the ischemic brain lesions (p=0.001) but no overall effect of temperature when data from both 2 and 7 days observation periods were analyzed together. The ischemic lesions were generally larger at 33 degrees after 2 days (p=0.230). Prolonged observation time of 7 days resulted in a significant reduction of the ischemic brain lesion (p=0.011) with smaller ischemic lesions in the hypothermic group. Our data support the notion that hypothermia-induced increase in the tissue concentrations of galanin in the brain are the result of changes from optimal homeostatic conditions - the hypothermia-induced stress - rather than the ischemia/re-perfusion lesion induced changes in galanin concentrations. Hypothermia-induced elevation in galanin concentration is therefore not likely to be amongst the major protective mechanisms of hypothermia." @default.
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• W2034501286 date "2008-02-01" @default.
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• W2034501286 title "Hypothermia-induced increase in galanin concentrations and ischemic neuroprotection in the rat brain" @default.
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• W2034501286 doi "https://doi.org/10.1016/j.npep.2007.09.008" @default.
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