Blocking transient receptor potential vanilloid 2 channel in astrocytes enhances astrocyte-mediated neuroprotection after oxygen-glucose deprivation and reoxygenation

2016 ◽  
Vol 44 (7) ◽  
pp. 2493-2503 ◽  
Author(s):  
Han Zhang ◽  
Jun Xiao ◽  
Zheng Hu ◽  
Minjie Xie ◽  
Wei Wang ◽  
...  
Keyword(s):  
Transient Receptor Potential ◽  
Receptor Potential ◽  
Glucose Deprivation ◽  
Oxygen Glucose Deprivation ◽  
Transient Receptor Potential Vanilloid ◽  
Transient Receptor

scholarly journals The Synergistic Effect of TRPV1 on Oxidative Stress-Induced Autophagy and Apoptosis in Microglia

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Tingting Huang ◽  
Yao Lin ◽  
Qiongyi Pang ◽  
Weimin Shen ◽  
Xiang Chen ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Ischemic Stroke ◽  
Transient Receptor Potential ◽  
Receptor Potential ◽  
Glucose Deprivation ◽  
Transient Receptor Potential Vanilloid ◽  
Stress Injury ◽  
Stroke Treatment ◽  
Transmission Electron ◽  
Transient Receptor

Stroke mostly including ischemic stroke is the second leading mortality and disability worldwide. Oxidative stress injury occurred during ischemic stroke treatment generally. A high amount of reactive oxygen species (ROS) is involved in oxidative stress induction. Transient receptor potential vanilloid 1 (TRPV1) has been shown to regulate oxidative stress and apoptosis in microglia; however, the detailed mechanisms remain unclear. We aimed to explore whether autophagy-regulated oxidative stress and apoptosis are associated with TRPV1. The model of oxygen and glucose deprivation (OGD/R) in microglia was established. The siRNA of Atg5 and inhibitors and agonists of both autophagy and TRPV1 were involved in our study. Autophagy-related markers Atg5, LC3II/LC3I, and Beclin-1 were measured, and the autophagosome was observed under a transmission electron microscope (TEM). Caspase 3 was detected using ELISA. ROS and JC-1 were detected using flow cytometry. Apoptosis was observed by TUNEL. The results indicated that oxidative stress-induced injury and apoptosis may be impeded by the increasing autophagy, and TRPV1 inhibition could suppress the OGD/R-induced autophagy of microglia. However, the effect of TRPV1’s inhibitor on oxidative stress and apoptosis was not obvious when the autophagy was blocked. These findings suggested that TRPV1 may exhibit antioxidative and antiapoptosis effect on OGD/R-induced microglia. However, the experimental results do not fully demonstrate that the TRPV1-mediated antioxidative and antiapoptosis effect is through the affecting autophagy entirely.

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