荭草提取物抗炎镇痛作用实验研究

目的探讨荭草提取物的抗炎镇痛作用。方法采用二甲苯致小鼠耳肿胀、蛋清致大鼠足跖肿胀2种急性炎症模型以及大鼠棉球肉芽肿慢性炎症模型,研究荭草水提物和醇提物ig给药的抗炎作用。采用热板法和醋酸扭体法致痛,研究荭草水提物和醇提物ig给药的镇痛作用。结果与模型组相比,荭草水提物和醇提物高、低剂量(生药7.5、3.75 g/kg)组显著抑制二甲苯所致小鼠耳肿胀(P<0.01),明显抑制蛋清所致大鼠足跖肿胀(P<0.05、0.01),明显抑制大鼠棉球肉芽肿(P<0.01)。荭草水提物和醇提物高、低剂量组给药后明显延长热板所致小鼠的痛阈值,与模型组比较差异显著(P<0.01);荭草水提物和醇提物高、低剂量组明显减少醋酸所致小鼠扭体反应次数,与模型组比较差异显著(P<0.01)。荭草水提物高、低剂量组给药后与相同剂量醇提物相比,各项指标差异显著(P<0.05、0.01)。结论荭草提取物ig给药具有抗炎、镇痛作用,且水提物作用强于醇提物。

Anti-inflammatory and analgesic effects of Polygonum orientale extract

Objective To investigate the anti-inflammatory and analgesic effects of Polygonum orientale extract. Methods The acute inflammatory models such as xylene-induced ear edema and egg white-induced paw edema and the chronic inflammatory model granuloma induced by cotton pellet implantation were used in researching the inflammatory effects of water and alcohol extract from P. orientale (POWE and POAE) by ig administration. Meanwhile, the analgesic effects of POWE and POAE were observed by hot plate and acetic acid writhing test. Results Compared with the model group, high- and low-dose (7.5 and 3.75 g/kg) POWE and POAE could significantly inhibit ear edema in mice (P < 0.01) and paw edema in rats (P < 0.05, 0.01). Also, POWE and POAE decreased the granuloma of rats (P < 0.01). Moreover, after treatment with high- and low-dose POWE and POAE, the pain threshold with hot plate method was significantly prolonged (P < 0.01) compared with the model group. The writhing number was reduced after administration (P < 0.01) compared to the model group. However, there were substantial variations between the POAE groups and the same dose of POWE in high and low concentration (P < 0.05, 0.01). Conclusion P. orientale extract possesses the anti-inflammatory and analgesic effect, and POWE has better effect than POAE.