THE EFFECTS OF POSTISCHEMIC HYPOTHERMIA ON THE NEURONAL INJURY AND BRAIN METABOLISM AFTER FOREBRAIN ISCHEMIA IN THE RAT

被引:42
作者
CHEN, H
CHOPP, M
VANDELINDE, AMQ
DERESKI, MO
GARCIA, JH
WELCH, KMA
机构
[1] OAKLAND UNIV,DEPT PHYS,ROCHESTER,MI 48309
[2] HENRY FORD HOSP,DEPT RADIAT ONCOL,DETROIT,MI 48202
关键词
RAT FOREBRAIN ISCHEMIA; POSTISCHEMIA HYPOTHERMIA; NEURONAL DAMAGE; INVIVO P-31 NMR SPECTROSCOPY; INTRACELLULAR PH; INTRACELLULAR [MG-2+;
D O I
10.1016/0022-510X(92)90288-V
中图分类号
R74 [神经病学与精神病学];
学科分类号
摘要
We investigated the effect of moderate post-ischemic hypothermia on neuropathological outcome and cerebral high energy phosphate metabolism, intracellular pH and Mg2+ concentration in the rat. Three groups of animals were investigated: (1) Wistar rats subjected to 12 min of forebrain ischemia under normothermic conditions (n = 17), (2) rats subjected to the identical procedure of ischemia, except that 30-degrees-C hypothermia was induced post-ischemia and maintained for 2 h of reperfusion (n = 6), and (3) control hypothermic rats not subjected to ischemia (n = 4). In Vivo P-31 NMR spectroscopy was performed prior to ischemia, and at intervals up to 168 h after ischemia. Histological analysis of brain tissues was performed 7 days after ischemia. No significant differences in cortical and hippocampal neuronal damage was detected between the two experimental groups. Significantly lower pH values were detected in the hypothermic ischemic animals at 24 h (P = 0.0001) and 48 h (P = 0.018) post-ischemia compared to the normothermic ischemic animals. Normothermic ischemic animals exhibited significantly lower [Mg2+] at 72 h (P < 0.006) compared to the pre-ischemia level. Our data indicate that post-ischemic hypothermia modifies the profiles of post-ischemic brain tissue pH and Mg2+ concentration, and this modification is not associated with histopathological outcome 7 days after ischemia.
引用
收藏
页码:191 / 198
页数:8
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