›› 2014, Vol. 32 ›› Issue (4): 368-371.
• Original Article • Previous Articles Next Articles
TANG Xiaojuan1, SUN Bin1, WANG Ying1, DING Xin1, YU Lun1, XU Lixiao2, FENG Xing1
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Abstract: Objective To study the expression of Ca-A/K channel-related molecules glutamate receptor 2 and 1(GluR2/1) in hippocampus tissues of neonatal rats with hypoxic-ischemic brain damage (HIBD). Methods A total of 60 7-day-old Sprague-Dawley rats were randomly divided into sham operation group and HIBD group. Hippocampal tissues were obtained at 0 h, 1 h, 6 h, 24 h, 48 h and 72 h after HIBD. The expression of GluR2, GluR1 and autophagy marker protein Beclin-1, LC3 were detected by Western blot assay. Results Edema and focal softening and necrosis were observed 6 h after HIBD in the brains of neonatal rats. Compared with Con group, at each time point, the expression levels of GluR2 were lower while the levels of GluR1, Beclin-1 and LC3 were higher significantly in HIBD group (P<0.05). The protein levels of LC3, Beclin-1, GluR1 and GluR2 in hippocampus tissues of HIBD group were significantly different among different time points after the establishment of HIBD model (F=10.65~701.14, P<0.01). The protein level of GluR2 was decreased from 1 h to 24 h after HIBD and reached the lowest level at 24 h. The levels of GluR1, Beclin-1 and LC3 were increased at 6 h, plateaued at 24 h and remained there until 48 h. The levels of these proteins returned back to the initial level at 72 h. Conclusions Ca-A/K channel-related molecules GluR2 and GluR1 play important roles in the autophagic cell death of hippocampus tissues in neonatal rats with hypoxic-ischemic brain damage.
TANG Xiaojuan,SUN Bin,WANG Ying,DING Xin,YU Lun,XU Lixiao,FENG Xing . The expression of glutamate receptor in hippocampus of neonatal rats with hypoxic-ischemic brain damage [J]., 2014, 32(4): 368-371.
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