Intrathecal administration of Cav3.2 and Cav3.3 antisense oligonucleotide reverses tactile allodynia and thermal hyperalgesia in rats following chronic compression of dorsal root of ganglion.
OBJECTIVE
The present study aimed to elucidate the role of T-subtype calcium channels (Cav3.1, Cav3.2, and Cav3.3) in the pathogenesis of neuropathic pain at spinal level.


METHODS
The chronic compression of the dorsal root ganglion (CCD) rat model was adopted. The antisense oligonucleotide of Cav3.1, Cav3.2, and Cav3.3 or normal saline (NS) were intrathecally administered twice per day from the first day to the fourth day after operation. Paw mechanical withdrawal threshold and paw thermal withdrawal latency were measured to evaluate the tactile allodynia and thermal hyperalgesia, respectively.


RESULTS
CCD rats developed reliable tactile allodynia and thermal hyperalgesia after operation. Intrathecal administration of antisense oligonucleotide of Cav3.2 and Cav3.3 significantly relieved tactile allodynia and thermal hyperalgesia in CCD rats, but not Cav3.1.


CONCLUSIONS
Cav3.2 and Cav3.3 subtype calcium channels in the spinal cord may play an important role in the pathogenesis of neuropathic pain, which may contribute to the management of the neuropathic pain.
Wen
Xian-jie
XJ
Department of Anesthesiology, the First Peopleos Hospital of FoShan and Affiliated FoShan Hospital of Sun-Yat Sen University, Foshan 528000, China.
Li
Zhang-jun
ZJ
Chen
Zhi-xin
ZX
Fang
Zhi-yuan
ZY
Yang
Chen-xiang
CX
Li
Heng
H
Zeng
Yin-ming
YM
D000818:Animals; D020747:Calcium Channels, T-Type / Q000235:genetics* / Q000378:metabolism; D005727:Ganglia, Spinal; D006358:Hot Temperature; D006930:Hyperalgesia / Q000503:physiopathology*; D007278:Injections, Spinal; D008297:Male; D026901:Membrane Transport Proteins / Q000235:genetics / Q000378:metabolism; D009408:Nerve Compression Syndromes / Q000378:metabolism / Q000503:physiopathology*; D016376:Oligonucleotides, Antisense / Q000008:administration & dosage / Q000494:pharmacology*; D010146:Pain / Q000503:physiopathology*; D010147:Pain Measurement / Q000187:drug effects; D051381:Rats; D017207:Rats, Sprague-Dawley; D013116:Spinal Cord / Q000378:metabolism
C469757:CACNA1I protein, human; C509958:Cacna1h protein, rat; D020747:Calcium Channels, T-Type; D026901:Membrane Transport Proteins; D016376:Oligonucleotides, Antisense