Effects of a synthetic allosteric modifier of hemoglobin oxygen affinity on outcome from global cerebral ischemia in the rat.
Effects of a synthetic allosteric modifier of hemoglobin oxygen affinity on outcome from global cerebral ischemia in the rat.
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血红蛋白氧亲和力的合成变构调节剂对大鼠全脑缺血结果的影响。
DOI:
10.1161/01.str.29.8.1650
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发表时间:
1998
期刊:
影响因子:
8.3
通讯作者:
Warner,DS
中科院分区:
文献类型:
--
作者:
Grocott,HP;Bart,RD;Sheng,H;Miura,Y;Steffen,R;Pearlstein,RD;Warner,DS
Background and Purpose—Neuronal injury results from an insufficient supply of oxygen to the brain. This experiment examined whether a pharmacologically induced rightward shift of the partial pressure of oxygen at which 50% of hemoglobin is saturated (P50) would improve outcome from either incomplete and/or near-complete forebrain ischemia–induced hypoxia in the rat.Methods—For incomplete ischemia (attenuated electroencephalogram), fasted rats (n=17 to 19 per group) were given a synthetic allosteric modifier of hemoglobin affinity for oxygen (RSR13; 150 mg/kg IV) before or immediately after 20 minutes of bilateral carotid occlusion combined with a decrease in mean arterial pressure to 40 mm Hg. For near-complete ischemia (isoelectric electroencephalogram), rats (n=15 per group) were given RSR13 (150 mg/kg) at onset of reperfusion after 10 minutes of bilateral carotid occlusion combined with a decrease in mean arterial pressure to 30 mm Hg. In both experiments, control rats were given vehicle (0.9% NaCl IV) only. Outcome (defined as percent dead hippocampal CA1 neurons) was determined at 5 days after ischemia.Results—RSR13 (150 mg/kg) produced a 68% rightward shift of P50 (34±3 to 57±8 mm Hg). RSR13 reduced CA1 damage resulting from incomplete ischemia by 28% (P=0.02), but only when administered at the onset of reperfusion. RSR13 had no effect on outcome from near-complete ischemia.Conclusions—A postischemic pharmacologically induced increase in P50 may improve outcome from incomplete global cerebral ischemia. More severe (near-complete) ischemia negates this benefit.
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DOI:
10.1152/ajpheart.1993.265.4.h1439
发表时间:
1993
期刊:
The American journal of physiology
影响因子:
--
作者:
Wei,EP;Randad,RS;Levasseur,JE;Abraham,DJ;Kontos,HA
通讯作者:
Kontos,HA
DOI:
--
发表时间:
1992
期刊:
影响因子:
--
作者:
D. J. Cole;R. Schell;R. Przybelski;J. Drummond;K. Bradley
通讯作者:
K. Bradley
影响因子:
8.3
作者:
H. Kimura;N. Hamasaki;M. Yamamoto;M. Tomonaga
通讯作者:
M. Tomonaga
影响因子:
8.8
作者:
W. A. Mutch;I R Thomson;J. Teskey;D. Thiessen;M. Rosenbloom
通讯作者:
M. Rosenbloom
DOI:
--
发表时间:
1989
期刊:
Journal of clinical chemistry and clinical biochemistry. Zeitschrift fur klinische Chemie und klinische Biochemie
影响因子:
--
作者:
R. W. Burnett;A. K. Covington;A. H. Maas;O. Müller;Weisberg Hf;P. Wimberley;Willem G. Zijlstra;O. Siggaard;Durst Ra
通讯作者:
Durst Ra