Sciatica, as a common clinical symptom, has been a difficult point in the field of pain research. Corydalis decumbens pers (CDP) contributed to the treatment of sciatica, as because of activating blood circulation, dissipating blood stasis, anti-inflammatory, activating meridians and stopping pain. However, its mechanism still remains unclear. Our previous studies have found that CDP improved extracellular matrix components in the microenvironment of damaged sciatic nerve and promoted the nerve functional recovery, but the key roles of various important cells in the microenvironment have not yet been explored. Literature suggests that RhoA signaling pathway regulate cytoskeleton reconstruction and affect cellular morphology change, migration, secretion, proliferation and growth, which in turn influence the local microenvironment. Now this research will investigate that CDP inhibit RhoA signaling pathway, and regulate the activities of kinds of important cells, including macrophages, Schwann cell and fibroblasts, and then improve the injured microenvironment and reduce the output of harmful information to treat sciatica. Through the experiments in vivo and vitro, this project aims to investigate the mechanism of CDP and explore the key role of RhoA signaling pathway in sciatica, then provide certain theoretical reference for the treatment of sciatica by CDP.
坐骨神经痛是临床常见症状,其病因和表现形式复杂,是疼痛研究领域的难点。中药夏天无具有活血袪瘀、消炎和通络止痛功效,临床上已用于治疗坐骨神经痛,但其作用机制尚未阐明。前期研究发现夏天无改善受损坐骨神经微环境的细胞外基质成分,并促进神经功能性恢复,但研究未阐述微环境内细胞所起作用。有文献提示RhoA信号通路调控细胞内细胞骨架重构,调节细胞形态改变、迁移、分泌、增殖和生长等活动,从而影响微环境稳态。本项目进一步讨论夏天无干预后能够抑制RhoA信号通路,影响受损神经微环境内多种细胞(巨噬细胞、施万细胞和成纤维细胞等)的活动,继而改善微环境,减少伤害性信息输出,从而治疗坐骨神经痛。项目拟通过构建坐骨神经痛动物模型,结合细胞培养,从分子、细胞和动物整体水平,深入研究夏天无治疗坐骨神经痛的机制,明确RhoA信号通路在其中起的关键作用并阐明其作用方式,为夏天无治疗坐骨神经痛的研究提供一定的理论依据和思路。
坐骨神经痛是临床上常见症状,由于其病因和表现形式的复杂性,坐骨神经痛一直是疼痛研究领域中的难点。中药夏天无已经被证实具有活血袪瘀、消炎和通络止痛功效,在临床上用于改善坐骨神经痛,但其作用机制尚未明确。前期研究发现夏天无改善坐骨神经夹伤模型ICR小鼠微环境,促进功能性恢复,但研究未阐述微环境内细胞所起作用。.因此课题组从体内、外实验出发,研究夏天无对受损神经微环境的改善及对微环境中关键细胞的干预作用。实验首先构建SD大鼠坐骨神经痛模型,发现夏天无干预后,减轻大鼠疼痛,明显改善受损神经微环境,表现为减轻受损神经水肿程度,胶原纤维细小、有序,减少巨噬细胞和成纤维细胞以及促炎因子表达减少。由于巨噬细胞和成纤维细胞等细胞在神经损伤时起到重要作用,影响受损神经微环境的重构。课题组据此进一步开展体外实验,构建LPS诱导的巨噬细胞RAW264.7和成纤维细胞NIH-3T3炎性损伤模型。研究发现夏天无干预增加巨噬细胞活力和增殖能力。诱导巨噬细胞向M2抗炎亚型分化,表现为形态改变、促炎因子分泌减少,抗炎因子分泌增多,增加M2细胞标记物表达,减少M1细胞标记物表达。抑制巨噬细胞迁移和吞噬能力。发现夏天无干预增加成纤维细胞活力,减少促炎因子表达,增加抗炎因子表达,减少成纤维细胞和肌成纤维细胞标记物表达,减少胶原蛋白和炎性因子分泌。实验进一步探讨RhoA通路,文献提示RhoA信号通路调控巨噬细胞和成纤维细胞内细胞骨架重构,调节细胞形态改变、迁移、分泌、增殖和分化等活动,从而影响微环境稳态。课题研究发现夏天无抑制RhoA信号通路相关蛋白表达,影响受损神经微环境内巨噬细胞和成纤维细胞各项活动,从而改善微环境,减少伤害性信息输出,治疗坐骨神经痛。课题为夏天无治疗坐骨神经痛的研究提供一定的理论依据和思路,初步完成研究目标。
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数据更新时间:2023-05-31
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