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서지반출
Intracisternal Administration of Voltage Dependent Calcium Channel Blockers Attenuates Orofacial Inflammatory Nociceptive Behavior in Rats
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  • Intracisternal Administration of Voltage Dependent Calcium Channel Blockers Attenuates Orofacial Inflammatory Nociceptive Behavior in Rats
  • Intracisternal Administration of Voltage Dependent Calcium Channel Blockers Attenuates Orofacial Inflammatory Nociceptive Behavior in Rats
저자명
Won. Kyoung-A.,Park. Sang-H.,Kim. Bo-K.,Baek. Kyoung-S.,Yoon. Dong-H.,Ahn. Dong-K.
간행물명
International journal of oral biology : official journal of the Korean Academy of Oral Biology and the UCLA Dental Research Institute
권/호정보
2011년|36권 2호|pp.43-50 (8 pages)
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대한구강생물학회
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정기간행물|ENG|
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

Voltage dependent calcium channel (VDCC), one of the most important regulator of $Ca^{2+}$ concentration in neuron, play an essential role in the central processing of nociceptive information. The present study investigated the antinociceptive effects of L, T or N type VDCC blockers on the formalin-induced orofacial inflammatory pain. Experiments were carried out on adult male Sprague-Dawley rats weighing 220-280 g. Anesthetized rats were individually fixed on a stereotaxic frame and a polyethylene (PE) tube was implanted for intracisternal injection. After 72 hours, 5% formalin ($50 ;{mu}L$) was applied subcutaneously to the vibrissa pad and nociceptive scratching behavior was recorded for nine successive 5 min intervals. VDCC blockers were administered intracisternally 20 minutes prior to subcutaneous injection of formalin into the orofacial area. The intracisternal administration of 350 or $700{mu}g$ of verapamil, a blocker of L type VDCC, significantly decreased the number of scratches and duration in the behavioral responses produced by formalin injection. Intracisternal administration of 75 or $150 ;{mu}g$ of mibefradil, a T type VDCC blocker, or 11 or $22; {mu}g$ of cilnidipine, a N type VDCC blocker, also produced significant suppression of the number of scratches and duration of scratching in the first and second phase. Neither intracisternal administration of all VDCC blockers nor vehicle did not affect in motor dysfunction. The present results suggest that central VDCCs play an important role in orofacial nociceptive transmission and a targeted inhibition of the VDCCs is a potentially important treatment approach for inflammatory pain originating in the orofacial area.