Effects of curcumin on the expressions of NR2A,NR2B and apoptotic neurons in hippocampus after ischemia-reperfusion in rats / 中国药理学通报

ABSTRACT

Aim To investigate the effect of curcumin on the expressions of NR2A, NR2B and apoptotic neurons in hippocampus after global brain ischemia-reperfusion in SD rats. Methods Global ischemic model induced by 4-vessel occlusion was adopted. Rats were randomly divided into 5 groups sham group (SH), ischemia-reperfusion group (I/R), curcumin 30(Cur 30), 100 (Cur 100) and 300 mg?kg-1 group (Cur 300). At different time points after ischemia, animals were designated as subgroups 2 h, 6 h, 1 d, 3 d, 7 d. Cell morphology was observed on HE stain slides. The apoptotic neurons were detected in CA1 region by TUNEL method. Expressions of NR2A and NR2B in hippocampal CA1 and CA3/DG regions were detected by Immunohistochemical technique. Results At each time point the number of apoptotic neurons was much more in I/R group than that in SH group and Cur 100 group,and in Cur 300 group than that in Cur 100 group. The expression of NR2A was higher in the hippocampal CA1 and CA3/DG regions in Cur 100,Cur 300, Cur 30 and SH groups than that in I/R group at each time point(P