Effects of colchicine-induced microtubule depolymerization on TRPV4 in rats with chronic compression of the dorsal root ganglion

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• 作者：Hui Wei^a ; ¹ ; ^{weihui2006@live.cn} ; Yang Zhang^a ; ¹ ; Zhen-Zhen Fan^a ; Hong-You Ge^b ; Lars Arendt-Nielsen^b ; Hong Jiang^c ; Wei Yao^d ; Shou-Wei Yue^a ; ^{drg98@hotmail.com}
• 关键词：DRG ; dorsal root ganglion ; CCD ; chronic compression of the dorsal root ganglion ; TRPV4 ; transient receptor potential vanilloid subtype 4 ; ODN ; oligodeoxynucleotide ; CCI ; loose ligation of the sciatic nerve
• 刊名：Neuroscience Letters
• 出版年：2013
• 出版时间：8 February, 2013
• 年：2013
• 卷：534
• 期：Complete
• 页码：344-350
• 全文大小：1005 K

文摘

The aim of this study was to investigate the effect of colchicine-induced microtubule depolymerization on allodynia in rats with chronic compression of the dorsal root ganglion (DRG) (CCD) and the effect of colchicine on transient receptor potential vanilloid 4 (TRPV4). Intrathecal administration of the anti-microtubule agent, colchicine, resulted in a dose-dependent and partial reduction in CCD-induced mechanical and thermal allodynia. The reduction of allodynia was associated with significant and dose-dependent decreases in the levels of both TRPV4 mRNA and protein expression in CCD rats. In addition, colchicine resulted in reduction and advance of TRPV4 currents in both DRG neurons and HEK293-TRPV4 cells. The current-voltage (IV) relation in HEK293-TRPV4 cells that were exposed to colchicine displayed a typical outward rectification characteristic of TRPV4 with the reversal potential shifted toward a more positive voltage. In conclusion, intrathecal administration of colchicine attenuated allodynia and TRPV4 contributed to the colchicine-induced attenuation of allodynia in CCD rats.