Analgesic Effect Comparison Between Living Rhino Horn and Rhino Horn / 中国药师

ABSTRACT

Objective:To compare the analgesic effect between living rhino horn and rhino horn in mice and rats,and to explore the possibility of living rhino horn used as a substitute of rhino horn. Methods:The analgesic effect was compared using the body tor-sion method and the formaldehyde method in mice,and the hot plate method and the thermal sting imager method in rats. Results:Compared with the control group,the living rhino horn at the dose of 0. 35,0. 7 and 1. 4 g·kg - 1 could significantly prolong the incu-bation period of body torsion induced by acetic acid(P < 0. 05 or P < 0. 01),and significantly reduce the number of body torsion(P <0. 05 or P < 0. 01). The three dose groups(0. 35,0. 7,1. 4 g·kg - 1 )of rhino horn could significantly reduce the number of body tor-sion(P < 0. 05 or P < 0. 01). After the second dose and compared with the control group,the pain threshold of high dose group(1. 4 g·kg - 1 )of living rhino horn,high and middle dose groups(0. 7,1. 4 g·kg - 1 )of rhino horn was significantly prolonged(P < 0. 05 or P < 0. 01). Compared with the control group,three dose groups(0. 175,0. 35,0. 7 g·kg - 1 )of living rhino horn and rhino horn could significantly reduce the analgesic effect in mice induced by formaldehyde in the second phase(P < 0. 01). Compared with the control group,the changes of pain threshold before and after the administration in three dose groups(110,220,440 mg·kg - 1 )of liv-ing rhino horn and high dose group(440 mg·kg - 1 )of rhino horn was significantly increased(P < 0. 05 or P < 0. 01). Conclusion:Living rhino horn can be used as a substitute of rhino horn with promising analgesia effect.