Yi Zhang1, Jing Yue, Midan Ai, Zhigang Ji, Zhiguo Liu, Xuehong Cao, Li Li. 1. From the Departments of *Anesthesiology and †Reproductive Medical Center, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, Hubei, China ‡Department of Experimental Therapeutics, The University of Texas MD Anderson Cancer Center, Houston, TX §Department of Neurology, Baylor College of Medicine, Houston, TX ¶Institution of Nutrition, Wuhan Polytechnic University, Changqing Garden, Wuhan, People's Republic of China ‖Institution of Nutrition, Wuhan Polytechnic University, Changqing Garden, Wuha, People's Republic of China; and Children's Nutrition Research Center, Baylor College of Medicine, Baylor College of Medicine, One Baylor Plaza, Houston, TX.
Abstract
STUDY DESIGN: We used optogenetic techniques in spinal cord and dorsal root ganglion (DRG) neuron studies. OBJECTIVE: This study investigated changes in channelrhodopsin-2 (ChR2) expression in the spinal cord and DRG neurons using optogenetic techniques. The results show the possibility of using optogenetics to treat neuropathic pain. SUMMARY OF BACKGROUND DATA: Previous studies have shown that activated ChR2 induces an increase in DRG neuron action potential. METHODS: Western blot analysis was used to measure ChR2 protein levels in the spinal cord and DRG neurons or rats intrathecally injected with ChR2 lentivirus. Electrophysiology recording was used to detect differences in action potential levels in the spinal cord and calcium channel currents in the DRG neurons. RESULTS: Our studies showed that ChR2 expression increased the action potential in the spinal cord and increased calcium channel currents in DRG neurons. CONCLUSION: We successfully expressed the ChR2 protein in the spinal cord and DRG neurons. We also found that ChR2 increased the action potential in the spinal cord and activated the calcium channel in DRG neurons. These findings support the research possibilities of using optogenetic studies to improve treatment for neuropathic pain. LEVEL OF EVIDENCE: N/A.
STUDY DESIGN: We used optogenetic techniques in spinal cord and dorsal root ganglion (DRG) neuron studies. OBJECTIVE: This study investigated changes in channelrhodopsin-2 (ChR2) expression in the spinal cord and DRG neurons using optogenetic techniques. The results show the possibility of using optogenetics to treat neuropathic pain. SUMMARY OF BACKGROUND DATA: Previous studies have shown that activated ChR2 induces an increase in DRG neuron action potential. METHODS: Western blot analysis was used to measure ChR2 protein levels in the spinal cord and DRG neurons or rats intrathecally injected with ChR2 lentivirus. Electrophysiology recording was used to detect differences in action potential levels in the spinal cord and calcium channel currents in the DRG neurons. RESULTS: Our studies showed that ChR2 expression increased the action potential in the spinal cord and increased calcium channel currents in DRG neurons. CONCLUSION: We successfully expressed the ChR2 protein in the spinal cord and DRG neurons. We also found that ChR2 increased the action potential in the spinal cord and activated the calcium channel in DRG neurons. These findings support the research possibilities of using optogenetic studies to improve treatment for neuropathic pain. LEVEL OF EVIDENCE: N/A.
Authors: Damon DePaoli; Alicja Gasecka; Mohamed Bahdine; Jean M Deschenes; Laurent Goetz; Jimena Perez-Sanchez; Robert P Bonin; Yves De Koninck; Martin Parent; Daniel C Côté Journal: Neurophotonics Date: 2020-03-10 Impact factor: 3.593