Neural stem cell-derived exosomes inhibit apoptosis of neurons induced by hypoxia neural cells
10.3969/j.issn.1000-4718.2018.04.022
- VernacularTitle:神经干细胞外泌体对低氧所致神经元凋亡的抑制作用
- Author:
Bo LI
1
;
Hong-Yan WEI
;
Yan YANG
;
Mei-Xian YING
;
Chun-Lin HU
;
Yuan-Zheng LU
;
Zhan-Peng SUN
;
Xiao-Xing LIAO
Author Information
1. 中山大学附属第一医院急诊科
- Keywords:
Neural stem cells;
Neurons;
Cobalt chloride;
Exosomes;
Apoptosis
- From:
Chinese Journal of Pathophysiology
2018;34(4):717-722,728
- CountryChina
- Language:Chinese
-
Abstract:
AIM: To investigate whether neural stem cell-derived exosomes promote the viability and inhibit the apoptosis of neurons under cobalt chloride(CoCl2)-induced hypoxia in vitro.METHODS:The exosomes were isolated based on ultracentrifugation.The exosomal markers,ALG-2-interacting protein X(Alix)and tumor susceptibility gene 101 (TSG101)were identified by Western blot.The shape of exosomes was observed under transmission electron microscope (TEM).The size distributions of exosomes were analyzed by nanoparticle analysis(qNano).The neurons were exposed in CoCl2at different doses(200~600 μmol/L)for 24 h.The exosomes were co-cultured with the neurons pre-treated with CoCl2.The viability and apoptosis of the neurons were measured by CCK-8 assay and TUNEL method.RESULTS: The exosomes released from the neural stem cells expressed exosomal markers Alix and TSG 101.They also displayed a cup-shaped appearance observed under TEM and their sizes were(95.0 ±23.5)nm(n=370).The neuronal viability was sig-nificantly inhibited by CoCl 2in a dose-dependent manner(P<0.05).After treatment with exosomes,the viability of the neuron pre-treated with CoCl2was increased and the apoptotic rate was decreased(P<0.05).CONCLUSION: Neural stem cell-derived exosomes promote the viability and inhibit the apoptosis of rat neurons uneder hypoxia.
