Effect of Calcium-sensing Receptor on the Apoptosis of Rat Spinal Cord Neurons in Anoxia/Reoxygenation Injury and Its Significance.
10.3881/j.issn.1000-503X.2017.05.005
- VernacularTitle:大鼠脊髓神经元缺氧复氧损伤中钙敏感受体对其凋亡的影响及意义
- Author:
Wei HE
1
;
Ji-Fu SUN
1
;
Run-Yu JIANG
1
;
Zhi-Jian ZHANG
2
;
Qian CHEN
2
;
Yong-Hui HUANG
1
Author Information
1. Department of Orthopaedics,Affiliated Hospital of Jiangsu University,Zhenjiang,Jiangsu 212001,China.
2. Basic and Clinic Medical Research Center,School of Medicine,Jiangsu University,Zhenjiang,Jiangsu 212013,China.
- Publication Type:Journal Article
- From:
Acta Academiae Medicinae Sinicae
2017;39(5):623-628
- CountryChina
- Language:English
-
Abstract:
Objective To investigate the effect and significance of calcium-sensing receptor (CaSR) on the apoptosis of rat spinal cord neurons in anoxia/reoxygenation(A/R) injury. Methods The spinal cells were in ischemia and hypoxia environment for 1 h and in normal environment for 24 h to establish a model of A/R. After spinal A/R model was established,the spinal cells were divided into four groups randomly:the control group,A/R group,A/R+GdCl3 group,and A/R+NPS-2390 group. The expression of CaSR in each group was detected by immunofluorescence and Western blotting. The concentration of intracellular calcium was measured by laser confocal scanning microscopy. The expressions of Caspase-3,Bax,and Bcl-2 were detected by using Western blotting. The apoptotic rate of spinal cells was detected by Tunel assay. Results Compared to the control group, there was a significant increase in the level of CaSR (t=5.462, P=0.006), the concentration of intracellular calcium (t=8.573, P=0.001), the apoptotic rate (t=4.899, P=0.008), Caspase-3 (t=5.118, P=0.007), and Bax (t=10.930,P=0.001) in A/R group. Compared to the A/R group, there was a significant increase in the level of CaSR (t=4.975, P=0.008),the concentration of intracellular calcium (t=4.899, P=0.008), the apoptotic rate (t=7.746, P=0.002), Caspase-3 (t=4.776, P=0.009), and Bax (t=5.281, P=0.006) in A/R+GdCl3 group. Compared to the A/R group, there was a significant decrease in the level of CaSR (t=3.674,P=0.021), the concentration of intracellular calcium (t=3.846, P=0.018), the apoptotic rate (t=4.281,P=0.013), Caspase-3 (t=3.521, P=0.024), and Bax(t=3.473, P=0.026) in A/R+NPS-2390 group. However, compared to the control group, there was a significant decrease in the level of Bcl-2 (t=6.242,P=0.003) in A/R group. Compared to the A/R group, there was a significant decrease in the level of Bcl-2(t=3.028, P=0.004) in A/R+GdCl3 group. Compared to the A/R group, there was a significant increase in the level of Bcl-2 (t=2.840, P=0.047) in A/R+NPS-2390 group.Conclusion During the process of A/R injury in rat spinal cord neurons,the expression of calcium sensing receptor increases,along with increase in intracellular calcium and spinal neuron apoptosis.
