不同浓度辣椒辣素对小鼠慢性膝关节炎疼痛模型的治疗效果分析

摘要

目的:观察不同浓度辣椒辣素对小鼠慢性膝关节炎疼痛模型的治疗效果.方法:选择健康成年雄性昆明小鼠50只,通过左膝关节腔内注射0.01 mL完全性弗氏佐剂(Complete Freund's Adjuvant,CFA)建立慢性膝关节炎疼痛模型,3周后建模成功.随后,将造模成功的小鼠随机分为五组(n=10):实验一组(生理盐水组)、实验二组(辣椒辣素赋形剂组)、实验三组(0.5％的辣椒辣素组)、实验四组(3％的辣椒辣素组)、实验五组(8％的辣椒辣素组).观察注药后1、4、7小时的热缩足反射时间以及注药后60天内的热缩足反射时间.结果:①生理盐水组与辣椒辣素赋形剂组注药后1、4、7小时的热缩足反射时间以及注药后60天内的热缩足反射时间比较差异均无统计学意义(P＞0.05).②实验三组注射辣椒辣素后产生的急性疼痛于注药后7小时恢复,实验四组小鼠的急性疼痛期于注药后4小时恢复,实验五组小鼠的急性疼痛期于注药后1小时恢复.③实验三组镇痛时间持续18.9±1.1天,实验四组镇痛时间持续33.7± 1.0天,实验五组镇痛时间持续58.2± 1.2天.结论:辣椒辣素对于CFA所致慢性膝关节炎疼痛模型具有镇痛作用,并且镇痛作用时间随着辣椒辣素的浓度增加而延长.%Objective:To observe the therapeutic effect ofcapsaicin at different concentrations on chronic knee arthritis pain model in mice.Methods:Choosing 50 healthy adult male Kunming mice builded chronic knee arthritis pain model by injecting 0.01 mL CFA (Complete Freund's Adjuvant,CFA) into left joint cavity.The model would be succeed in building after 3 weeks.The successful model mice were divided into five groups randomly (n=10):The first experimental group (saline group),the second experimental group (capsaicin excipient group),the third experimental group (0.5 ％ of capsaicin),the fourth experimental group (3 ％ of capsaicin) and the fifth experimental group (8 ％ of capsaicin).All of the mice would be observed the time of withdrawal latencies from the thermal heated surface after administration of one,four and seven hours,and thermal withdrawal time within 60 days after the injection.Results:①The physiological saline group compared with excipient group,the thermal withdrawal time had no statistically significant difference (P＞0.05)after administration of one,four and seven hours,and thermal withdrawal time within 60 days.②The acute pain duration of the third group would disappear after capsaicin injection 7 hours,four hours for the fourth group,and one hour for the fifth group.③The duration of analgesia of the third group,lasted for 18.9± 1.1 days;The analgesia time of the fourth group lasted for 33.7± 1.0 days;The analgesia time of the fifth group lasted for 58.2± 1.2 days.Conclusions:Capsaicin has analgesic effects on chronic knee pain model in mice induced by CFA,and the days of analgesia increases with the concentration of capsaicin.