“三法三穴”推拿通过延缓失神经肌萎缩改善SNI大鼠运动功能的机制研究
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北京中医药大学针灸推拿学院

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国家自然科学(No.82274675),北京市自然科学基金项目(No.7232278)


Research on the Mechanism of "Three Methods and Three Points" Massage in Improving Motor Function of SNI Rats by Delaying Denervated muscle Atrophy
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1.北京中医药大学;2.Beijing University of Chinese Medicine

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    摘要:

    【摘要】 目的 探讨“三法三穴”推拿通过延缓失神经肌萎缩改善SNI大鼠运动功能的机制。方法 将36只雄性SD大鼠随机分为正常组(n=9)、假手术组(n=9)、模型组(n=9)、推拿组(n=9)。模型组、推拿组采用钳夹法建立SNI模型;假手术组仅暴露坐骨神经,不夹持。于术后第7 d起,对推拿组大鼠进行干预。使用智能推拿手法模拟仪,依次于殷门、承山、阳陵泉施以点法、拨法及揉法。各穴位每种手法操作1分钟,每日治疗1次。完成10次干预后休息1 d,随后继续进行为期10 d的相同干预;假手术组与模型组大鼠仅接受等时长的抓握固定处理;正常组维持常规饲养状态。分别于造模前、干预10次、20次后测量后肢抓力以评价肌力。推拿20次结束后处死大鼠并取材,采用HE染色法观察大鼠右侧腓肠肌肌萎缩情况并测定肌纤维横径面积;RT-PCR技术检测右侧腓肠肌组织CCNB1、CNTF、MEF2A mRNA表达;Western-blot检测右侧腓肠肌组织PAX3、Desmin、HGF蛋白表达;免疫荧光法检测患侧腓肠肌MEF2C的蛋白表达。结果 与正常组、假手术组相比,模型组大鼠后肢抓力显著降低(P<0.01);模型组大鼠肌纤维排列紊乱,肌细胞明显萎缩,横截面积显著降低(P<0.01),CCNB1、CNTF、MEF2A mRNA及PAX3、Desmin、HGF、MEF2C蛋白的表达低于正常组及假手术组(P<0.05),与模型组比较,推拿组大鼠后肢抓力显著提升(P<0.01),肌纤维虽有萎缩,但肌纤维排列有序,未见明显紊乱,横截面积显著升高(P<0.01),CCNB1、CNTF、MEF2A mRNA及PAX3、Desmin、HGF、MEF2C蛋白的表达显著上调(P<0.05)。结论 “三法三穴”推拿可促进CCNB1、CNTF、MEF2A mRNA及PAX3、Desmin、HGF、MEF2C蛋白的表达,促进肌卫星细胞增殖分化及修复神经损伤延缓失神经肌萎缩,改善SNI大鼠运动功能。

    Abstract:

    【Abstract】 Objective:To explore the mechanism by which "three techniques and three acupoints" massage improves the motor function of SNI rats by delaying denervated muscle atrophy. Methods: Thirty-six male SD rats were randomly divided into normal group (n=9), sham operation group (n=9), model group (n=9), and massage group (n=9). The model group and massage group were subjected to SNI model establishment by clamping method; the sham operation group only exposed the sciatic nerve without clamping. From the 7th day after surgery, the massage group rats were intervened. An intelligent massage technique simulation instrument was used to apply point, pull, and knead techniques to Yinmen, Chengshan, and Yanglingquan acupoints in sequence. Each acupoint was treated with each technique for 1 minute, once a day. After 10 interventions, a 1-day rest was taken, followed by another 10-day intervention; the sham operation group and model group rats only received the same duration of grasping and fixation treatment; the normal group maintained routine feeding conditions. The hind limb grip force was measured before modeling, after 10 and 20 interventions to evaluate muscle strength. After 20 massage sessions, the rats were sacrificed and the right gastrocnemius muscle was taken for HE staining to observe the muscle atrophy and measure the cross-sectional area of muscle fibers; RT-PCR was used to detect the expression of CCNB1, CNTF, and MEF2A mRNA in the right gastrocnemius muscle tissue; Western-blot was used to detect the expression of PAX3, Desmin, HGF, and MEF2C proteins in the right gastrocnemius muscle tissue; immunofluorescence was used to detect the expression of MEF2C protein in the affected gastrocnemius muscle. Results: Compared with the normal group and sham operation group, the hind limb grip force of the model group rats was significantly reduced (P<0.01); the muscle fibers of the model group rats were disordered, the muscle cells were significantly atrophied, and the cross-sectional area was significantly reduced (P<0.01), and the expression of CCNB1, CNTF, MEF2A mRNA and PAX3, Desmin, HGF, and MEF2C proteins was lower than that of the normal group and sham operation group (P<0.05). Compared with the model group, the hind limb grip force of the massage group rats was significantly increased (P<0.01), the muscle fibers were atrophied but arranged orderly without obvious disorder, and the cross-sectional area was significantly increased (P<0.01), and the expression of CCNB1, CNTF, MEF2A mRNA and PAX3, Desmin, HGF, and MEF2C proteins was significantly upregulated (P<0.05). Conclusions "Three techniques and three acupoints" massage can promote the expression of CCNB1, CNTF, MEF2A mRNA and PAX3, Desmin, HGF, and MEF2C proteins, promote the proliferation and differentiation of muscle satellite cells and repair nerve injury, delay denervated muscle atrophy, and improve the motor function of SNI rats.

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  • 收稿日期:2025-07-21
  • 最后修改日期:2025-09-23
  • 录用日期:2025-10-29
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