Abstract
Objective
To observe the effect of herbal-partitioned moxibustion (HPM) on pain-related behavior and emotion in a rat model of chronic inflammatory visceral pain, and to investigate the mechanism.
Methods
Twenty-four male Sprague-Dawley (SD) rats were randomly divided into three groups: a normal group, a model group and an HPM group. Except for the normal group, rats in the other two groups were clystered with mixed liquor of Trinitrobenzene Sulfonic Acid (TNBS) and 50% ethanol to induce the chronic inflammatory visceral pain model. After the models were established successfully, rats in the HPM group were treated with HPM at bilateral Tianshu (ST 25) and Qihai (CV 6). Rats in the normal group and the model group were only fixed as those in the HPM group without treatment. Abdominal withdrawal reflex (AWR) score, mechanical withdrawal threshold (MWT) and thermal withdrawal latency (TWL) were adopted to detect the visceral and somatic pain; meanwhile, open field test (OFT) and elevated plus maze test (EPMT) were employed to evaluate pain emotions such as depression and anxiety.
Results
Compared with the normal group, AWR scores of the model group were significantly increased under different stimulus expansion pressure level (P<0.01), MWT and TWL were significantly decreased (P<0.05); in OFT, the values of horizontal activities and vertical activities were significantly decreased (P<0.01); in EPMT, the proportion of the number of entry into the open arms (OE%) and that of residence time in the open arms (OT%) significantly decreased (P<0.01), indicating that the model was successful. Compared with the model group, the AWR score of the HPM group was decreased significantly (P<0.05), MWT and TWL were significantly increased (P<0.05), the values of horizontal activities and vertical activities in the model group were significantly increased (P<0.01); in OFT and EPMT, OE% and OT% were significantly increased (P<0.01).
Conclusion
HPM has analgesic effect on chronic inflammatory visceral pain. It can reduce the visceral and somatic pain in rats and markedly improve the emotions such as anxiety and depression induced by chronic visceral pain.
摘要
目的
观察隔药灸对慢性炎性内脏痛大鼠痛行为和痛情绪的影响, 探讨其镇痛机理。
方法
将24只SD大鼠随机分为正常组、 模型组和隔药灸组。 除正常组外, 其余两组采用三硝基苯磺酸灌肠制备慢性炎性内脏痛大鼠模型。 造模成功后, 隔药灸组采用隔药灸天枢、 气海治疗, 模型组及正常组不治疗, 只做与隔药灸组相同的固定。 通过腹壁撤回反射(AWR)评分、 机械性缩足反射阈值(MWT)和热缩足潜伏期(TWL)评估大鼠内脏和躯体痛觉; 通过旷场实验(OFT)和高架十字迷宫测试(EPMT)评估大鼠焦虑、 抑郁等疼痛情绪。
结果
与正常组比较, 模型组大鼠AWR评分在不同刺激扩张压力水平下均显著升高(P<0.01), MWT及TWL均显著降低(P<0.05), OFT中水平活动值和垂直活动值均明显下降(P<0.01), EPMT中开臂进入次数比例及开臂停留时间比例均明显下降(P<0.01), 提示造模成功。 与模型组比较, 隔药灸组大鼠AWR评分显著下降(P<0.05), MWT及TWL显著增加(P<0.05), OFT中水平活动值和垂直活动值均明显升高(P<0.01), EPMT中进入开放臂次数比例及进入开放臂时间比例均明显升高(P<0.01)。
结论
隔药灸对慢性炎性内脏痛大鼠有良好的镇痛作用, 能显著减轻大鼠内脏和躯体疼痛, 同时也能明显改善慢性内脏痛所致的焦虑、 抑郁等痛情绪的变化。
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Huang, Y., Yang, Yt., Liu, Xx. et al. Effect of herbal-partitioned moxibustion at Tianshu (ST 25) and Qihai (CV 6) on pain-related behavior and emotion in rats with chronic inflammatory visceral pain. J. Acupunct. Tuina. Sci. 13, 1–8 (2015). https://doi.org/10.1007/s11726-015-0814-1
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DOI: https://doi.org/10.1007/s11726-015-0814-1
Keywords
- Moxibustion Therapy
- Point, Tianshu (ST 25)
- Point, Qihai (CV 6)
- Inflammatory Bowel Diseases
- Visceral Pain
- Behavior
- Emotions
- Rats