国际麻醉学与复苏杂志   2013, Issue (4): 8-8
    
大鼠切口痛模型中鞘内注射不同浓度KN93对瑞芬太尼诱发的痛觉过敏的影响
程崇学, 赵鑫, 张兢, 顾小萍, 马正良1()
1.徐州医学院
Effects of different dose of KN93 on remifentanil-induced hyperalgesia
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摘要:

目的 观察不同剂量KN93对瑞芬太尼痛觉过敏大鼠痛行为的影响。 方法 采用完全随机分组方法,将36只雄性SD大鼠分为6组(每组6只):① 空白对照组;② 切口组;③ 瑞芬太尼组;④ KN93 25 μg组;⑤ KN93 50 μg组;⑥ KN93 100 μg组。除空白对照组外,其余各组均制作切口痛模型、瑞芬太尼组及KN93 3个剂量组,手术过程中皮下输注瑞芬太尼(40 μg/kg,1 mg溶于40 ml生理盐水中)30 min。各组大鼠分别于术前24 h、术后2、6、24、48 h测定术侧机械缩足阈值(paw withdrawal mechanical threshold, PWMT)和热缩足潜伏期(paw withdrawal thermal latency, PWTL)。 结果 与切口组比较,瑞芬太尼组术后出现痛觉过敏表现PWMT (20.9±2.6,19.6±1.8,21.9±2.0,22.3±1.9) 及PWTL[(8.5±1.5) s,(8.6±1.5) s,(8.5±2.0) s,(9.1±1.5) s],P<0.05。鞘内注射KN93 25 μg对痛觉过敏大鼠痛行为无改善作用,鞘内注射KN93 50、100 μg能剂量依赖性改善瑞芬太尼所致痛觉过敏大鼠痛行为,P<0.05。 结论 瑞芬太尼诱发切口痛大鼠痛觉过敏;KN93剂量依赖性的改善瑞芬太尼诱发的痛觉过敏。

关键词: 瑞芬太尼;切口痛;KN93;钙-钙调蛋白依赖性激酶Ⅱ
Abstract:

Objective To observe effects of different dose of (calcium/calmodulin-dependent protein kinaseⅡ, CaMKⅡ) inhibitor KN93 on the hyperalgesia induced by remifentanil in rat model of incisional pain. Methods Thirty six Sprague Dawley rats were divided randomly into 6 groups with 6 rats each. Control; Incisional pain group; Remifentanil group; KN93 group (25 μg); KN93 group (50 μg); KN93 group (100 μg). The model of incisional pain was performed in all groups except the control. In remifentanil group and KN93 (25, 50, 100 μg) groups, remifentanil (40 μg/kg) was given subcutaneously 30 min after the beginning of surgery. The paw withdrawal mechanical threshold (PWMT) and paw withdrawal thermal latency (PWTL) at the times of 24 h before and 2, 6, 24, 48 h after surgery were underwent. Results Compared with the incisional pain group ,the rats in the remifentanil group {the PWMT (20.86±2.55, 19.57±1.81, 21.87±2.01, 22.26±1.91) and the PWTL [(8.47±1.52) s, (8.58±1.51) s, (8.45±2.05) s,(9.06±1.47) s]} showed sensory hyperalgesia(P<0.05). 25 μg KN93 had no effect on the hyperalgesia induced by remifentanil, while 50 μg and 100 μg KN93 can relieve the hyperalgesia induced by remifentanil(P<0.05). Conclusions Remifentanil can induce sensory hyperalgesia; Intrathecal injection KN93 may relieve the hyperalgesia dose-dependently.

Key words: Remifentanil ;Incisional pain;KN93;CaMKⅡ