5-hydroxytryptamine1A receptor is involved in the bee venom induced inflammatory pain.
Injection of bee venom into one hindpaw of rat can elicit acute inflammation together with spontaneous pain, heat hyperalgesia and mechanical hyperalgesia/allodynia in the injected paw. 5-hydroxytryptamine (5-HT)1A receptor is the predominant receptor subtype in the spinal dorsal horn mediating the function of 5-HT in nociception. The goal of the present study is to assess the role of 5-HT1A receptor in the pain associated with the bee venom induced inflammation. Here we showed that 1 or 4 h after a subcutaneous bee venom challenge, expression of 5-HT1A receptor mRNA in the ipsilateral lumbar spinal cord increased significantly by 80.94 or 37.86%, respectively. Antisense oligodeoxynucleotide knockdown of spinal 5-HT1A receptor attenuated spontaneous pain and reversed heat hyperalgesia in rats injected with bee venom. Thus, the present data suggest a facilitating role for 5-HT1A receptor in bee venom induced inflammatory pain.
Department of Anatomy and K.K. Leung Brain Research Centre, The Fourth Military Medical University, 17 West Chang'le Road, Xi'an 710032, People's Republic of China.
Wen
W
Wang
Sheng-Xi
SX
Wu
Ya-Yun
YY
Wang
Xiang-Yu
XY
Liu
Yun-Qing
YQ
Li
D000818:Animals; D001514:Bee Venoms; D015153:Blotting, Western; D015870:Gene Expression; D007249:Inflammation / Q000139:chemically induced / Q000378:metabolism; D008159:Lumbar Vertebrae; D008297:Male; D020319:Oligodeoxyribonucleotides, Antisense; D010146:Pain / Q000139:chemically induced / Q000378:metabolism*; D012333:RNA, Messenger / Q000032:analysis; D051381:Rats; D017207:Rats, Sprague-Dawley; D044282:Receptor, Serotonin, 5-HT1A / Q000235:genetics* / Q000378:metabolism*; D013116:Spinal Cord / Q000378:metabolism
D001514:Bee Venoms; D020319:Oligodeoxyribonucleotides, Antisense; D012333:RNA, Messenger; D044282:Receptor, Serotonin, 5-HT1A