Neuroprotective Effects of Genistein in Mongolian Gerbils: Estrogen Receptor-β Involvement

被引:43
作者
Donzelli, Andrea [1 ]
Braida, Daniela [1 ]
Finardi, Annamaria [1 ]
Capurro, Valeria [1 ]
Valsecchi, Anna Elisa [1 ]
Colleoni, Mariapia [1 ]
Sala, Mariaelvina [1 ]
机构
[1] Univ Milan, Dept Pharmacol Chemotherapy & Med Toxicol, I-20129 Milan, Italy
关键词
ischemia; electroencephalography (EEG); phytoestrogen; CA(1); estrogen receptor-beta; DELAYED NEURONAL DEATH; SOY ISOFLAVONE GENISTEIN; TYROSINE PHOSPHORYLATION; FOREBRAIN ISCHEMIA; OXIDATIVE STRESS; GLOBAL-ISCHEMIA; PHYTOESTROGENS; INJURY; BRAIN; PREVENTION;
D O I
10.1254/jphs.10164FP
中图分类号
R9 [药学];
学科分类号
1007 ;
摘要
Genistein is a naturally occurring plant-derived phytoestrogen, present in the human diet, known to possess some beneficial effects. The present study investigated the effect of genistein on neuroprotection evaluated through electroencephalographic and behavioural correlates in a model of global cerebral ischemia in gerbils. Over the dose range tested, genistein (3 and 10 mg/kg), given 5 min after recirculation antagonized the ischemia-induced electroencephalographic total spectral power decrease 7 days after ischemia; fully prevented ischemia-induced hyperlocomotion evaluated 1 day after ischemia; reversed ischemia-induced memory impairment evaluated through both nest building behaviour and object recognition test; decreased malondialdehyde overproduction in the brain, evaluated 7 days after reperfusion; and fully promoted the survival of pyramidal cells in the CA, hippocampal subfield. The selective antagonist for estrogen receptor-beta (ER beta), 4[2-phenyl-5,7-bis(trifluoromethyl) pyrazolo[1,5-alpha]pyrimidin-3-yl]phenol (PHTPP) given 30 min before carotid occlusion, fully prevented the neuroprotective effect of genistein at the dose of 3 mg/kg. These results demonstrate the neuroprotective effect of genistein through the activation of ER beta and provide further grounds for the growing interest concerning the true potential of phytoestrogens as compounds to beneficially affect brain injury without having the disadvantages of estrogens.
引用
收藏
页码:158 / 167
页数:10
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