ABSTRACT
Objective To explore the effect of status epilepticus(SE) on learning and memory and expression of phosphorylated c-AMP response element binding protein(pCREB) in hippocampus in developmental rats.Methods Developmental male SD rats were assigned randomly to two groups:the SE rats,induced by intraperitoneal injection of pentylenetetrazole(PTZ);normal saline(NS) control group,received saline intraperitoneal.Learning and memory test with the Morris water maze and Y maze were performed at 7 days after SE.After testing,a subset of rats were killed and the brain was evaluated for pCREB immunostaining,an important transcription factor underlying learning and memory.Results In SE group,the mean escape latency of searching the platform significantly prolonged(P
ABSTRACT
AIM:To investigate the effect of calcitonin gene related peptide(CGRP)on the expression of cyclic AMP response element binding protein(CREB)and phosphorylated-CREB in rat parietal cortex during focal cerebral ischemia/reperfusion(I/R).METHODS:Focal cerebral ischemia/reperfusion model was induced by occlusion of the right middle cerebral artery using the intraluminal suture method.The expressions of CREB and phospho-CREB in the parietal cortex in different groups(sham group,focal cerebral ischemia/reperfusion group and CGRP group)were detected with immunohistochemistry and Western blotting,and the positive products were analyzed by image analysis system.RESULTS:There was definite expression of CREB in right parietal cortex in sham group,while it was lesser in I/R group than that in sham group,but it became more in CGRP group than that in I/R group(P
ABSTRACT
Objective To investigate the effect of calcitonin gene related peptide(CGRP) on the expression of cyclic AMP response element binding protein(CREB) mRNA in rat hippocampus and parietal cortex during focal cerebral ischemia and reperfusion(I/R). Methods Focal cerebral ischemia/reperfusion model was induced by occluding of the right middle cerebral artery using the intraluminal suture method.Hybridization in situ experiment was used to detect the expression of CREB mRNA in the ipsilateral hippocampal CA1 region and parietal cortex during different reperfusion periods.The positive product of CREB mRNA was analyzed by image analysis system. Results There was a distinct expression of CREB mRNA in right hippocampal CA1 region and parietal cortex in sham group.The absorbency of CREB mRNA positive product reduced in I/R group as compared to sham group,while it increased in CGRP group than I/R group(P
ABSTRACT
Objective To investigate the effect of exogenous calcitonin gene related peptide(CGRP) and nerve growth factor(NGF) on the expression of cyclic AMP response element binding protein(CREB) and phosphorylated CREB(p-CREB) in rat hippocampus during focal cerebral ischemia/reperfusion(I/R). Methods Focal cerebral ischemia/reperfusion model was set up by occlusion of the right middle cerebral artery using the intraluminal suture method.The expression of CREB and p-CREB in the right hippocampus were detected with immunohistochemistrical SABC method and Western blotting.The immunoreactive positive products were analyzed by image analysis system. Results The expression of CREB decreased in I/R group as compared with sham group in right hippocampus,but the expression of p-CREB was higher in I/R group than that in sham group(P