Effects of 5-hydroxymethyl Furfural Extracted from Rehmannia Glutinosa Libosch on the Expression of Signaling Molecules Relevant to Learning and Memory among Hippocampal Neurons Exposed to High Concentration of Corticosterone  

作　　者：张丽娜 金国琴 张学礼 龚张斌 顾翠英 

机构地区：[1]Department of Biochemistry,Institute of Basic Medicine,Shanghai University of Traditional Chinese Medicine

出　　处：《Chinese Journal of Integrative Medicine》2014年第11期844-849,共6页中国结合医学杂志（英文版）

基　　金：Support by the National Natural Science Foundation of China(No.30873317),;Leading Academic Discipline Project of Shanghai Municipal Education Commission(No.J50301),;Shanghai Health Bureau of Scientific Research Projects(No.20124Y025)

摘　　要：Objective：To determine the effects of 5-hydroxymethyl furfural（5-HMF）,an extract of Rehmannia glutinosa Libosch,on several down-regulated signaling molecules involved in learning and memory in hippocampal neurons.Methods：After cultured for 7 days,primary hippocampal neurons were divided into 5 groups：normal,corticosterone model,RU38486,5-HMF,and donepezil group.Neuron survival rates were calculated 24 h later using SYT013-P1 double-fluorescence staining and an 3-（4,5-Dimethylthiazol-2-yl）-2,5-diphenyltetrazolium bromide（MTT）assay.β-galactosidase activity was also assayed.Protein expressed by the glucocorticoid receptor（GCR）,brainderived neurotrophic factor（BDNF）,and N-methyl-D-aspartate receptor 2B（NR2B）,as well as phosphorylationcyclic adenosine monophosphate（cAMP）response element binding protein（p-CREB）,phosphorylation-extracellular signal-regulated kinase（p-ERK）,and phosphorylation-synapsin（p-synapsin）were quantified with Western blot.Results：Hippocampal neuron survival rates and the above-mentioned proteins were dramatically decreased（P〈0.05）,β-galactosidase activity was significantly increased in the model group,but the effect was reversed by5-HMF,RU38486,and to a lesser extent by donepezil（P〈0.05）.Conclusion：5-HMF extracts from the Chinese herb Rehmannia glutinosa Libosch could protect hippocampal neurons from glucocorticoid injury and from down-regulated signaling molecules in the GCR-BDNF-NR2B-p-ERK-p-CREB-p-synapsin signal transduction pathway.Objective：To determine the effects of 5-hydroxymethyl furfural（5-HMF）,an extract of Rehmannia glutinosa Libosch,on several down-regulated signaling molecules involved in learning and memory in hippocampal neurons.Methods：After cultured for 7 days,primary hippocampal neurons were divided into 5 groups：normal,corticosterone model,RU38486,5-HMF,and donepezil group.Neuron survival rates were calculated 24 h later using SYT013-P1 double-fluorescence staining and an 3-（4,5-Dimethylthiazol-2-yl）-2,5-diphenyltetrazolium bromide（MTT）assay.β-galactosidase activity was also assayed.Protein expressed by the glucocorticoid receptor（GCR）,brainderived neurotrophic factor（BDNF）,and N-methyl-D-aspartate receptor 2B（NR2B）,as well as phosphorylationcyclic adenosine monophosphate（cAMP）response element binding protein（p-CREB）,phosphorylation-extracellular signal-regulated kinase（p-ERK）,and phosphorylation-synapsin（p-synapsin）were quantified with Western blot.Results：Hippocampal neuron survival rates and the above-mentioned proteins were dramatically decreased（P〈0.05）,β-galactosidase activity was significantly increased in the model group,but the effect was reversed by5-HMF,RU38486,and to a lesser extent by donepezil（P〈0.05）.Conclusion：5-HMF extracts from the Chinese herb Rehmannia glutinosa Libosch could protect hippocampal neurons from glucocorticoid injury and from down-regulated signaling molecules in the GCR-BDNF-NR2B-p-ERK-p-CREB-p-synapsin signal transduction pathway.

关 键 词：5-hydroxymethyl furfural signal transduction learning and memory corticosterone hippocampus neuron Chinese medicine 

分 类 号：R285[医药卫生—中药学]