当前位置:首页>南京>南京中医药大学丨延胡索乙素通过TRPV1‑SP‑巨噬细胞轴缓解癌性骨痛:全新镇痛机制揭秘

南京中医药大学丨延胡索乙素通过TRPV1‑SP‑巨噬细胞轴缓解癌性骨痛:全新镇痛机制揭秘

  • 2026-04-16 03:12:20
南京中医药大学丨延胡索乙素通过TRPV1‑SP‑巨噬细胞轴缓解癌性骨痛:全新镇痛机制揭秘

本研究以癌性骨痛(CIBP)临床治疗困境与延胡索乙素(THP)镇痛机制不清为切入点,构建小鼠 CIBP 模型及 TRPV1 敲除模型,采用行为学、免疫荧光、qPCR、ELISA、钙成像、细胞迁移与流式细胞学等方法,先明确 THP 对 CIBP 小鼠痛觉过敏与自发痛的改善作用,再探究其对 DRG 及坐骨神经巨噬细胞浸润、P 物质(SP)释放的影响,进而验证 TRPV1 在 THP 调控 SP 释放与巨噬细胞趋化中的核心作用,最后明确 THP 对巨噬细胞 M2 极化的直接促进效应;结果显示 THP 不影响肿瘤与骨密度,早期通过抑制 TRPV1 减少 SP 释放以阻断巨噬细胞募集,全程直接促进巨噬细胞向抗炎 M2 表型极化,双通路协同缓解 CIBP,为 THP 用于癌性骨痛治疗提供机制依据。

研究设计

建立 CIBP 小鼠模型与 TRPV1 敲除 CIBP 模型,经灌胃给予 THP 后通过行为学评估机械、冷热痛觉过敏及自发痛,借助免疫荧光、qPCR、ELISA 检测 DRG 与坐骨神经巨噬细胞浸润、SP 释放、炎症因子及极化标志物水平,利用钙成像、分子对接验证 THP 对 TRPV1 功能的直接抑制作用,通过细胞迁移、流式细胞学明确 THP 对巨噬细胞迁移与 M2 极化的调控,最终解析 THP 缓解 CIBP 的双阶段分子机制。

研究结果

THP(80 mg/kg)可显著改善 CIBP 小鼠机械、冷热痛觉过敏与自发痛,且不影响肿瘤生长与骨密度;THP 能减少 DRG 及坐骨神经巨噬细胞浸润,降低 M1 型标志物 iNOS、促炎因子 TNF‑α、IL‑1β,升高 M2 型标志物 CD206、抗炎因子 IL‑4、IL‑10;THP 可抑制 DRG 神经元 SP 释放及 Tac1 表达,阻断 SP 介导的巨噬细胞迁移;TRPV1 敲除会消除 THP 对巨噬细胞募集、SP 释放的抑制作用,钙成像证实 THP 直接抑制 TRPV1 功能(IC50=77.9 μM);THP 在 CIBP 进展期可直接促进巨噬细胞向 M2 极化,维持镇痛效果。

Fig.1:证实 THP 可剂量依赖性、时间依赖性缓解 CIBP 小鼠机械、冷热痛觉过敏及自发痛,确定 80 mg/kg 为有效剂量。

Fig.2:证明 THP 能减少 CIBP 小鼠 DRG 与坐骨神经巨噬细胞浸润,抑制 M1 型极化、促进 M2 型极化并调控炎症因子表达。

Fig.3:明确 THP 可抑制 DRG 神经元 SP 释放,阻断 SP 介导的巨噬细胞迁移,验证 SP 是 THP 调控巨噬细胞趋化的关键介质。

Fig.4:证实 TRPV1 是 THP 抑制巨噬细胞募集、减少 SP 释放的必需靶点,敲除后 THP 上述作用消失。

Fig.5:验证 TRPV1 在 CIBP 中可促进 DRG 神经元 SP 释放,是 SP 释放的上游关键调控分子。

Fig.6:从钙成像、分子对接等角度证明 THP 直接抑制 TRPV1 通道功能,是其镇痛的关键分子作用。

Fig.7:证实 THP 在 CIBP 进展期可直接促进巨噬细胞向 M2 型极化,独立发挥抗炎镇痛作用。

Fig.8:总结 THP 缓解 CIBP 的双阶段机制,早期 TRPV1‑SP 通路抑制巨噬细胞募集,全程促进 M2 极化。

研究结论

本研究首次揭示 THP 通过早期抑制 TRPV1‑SP 轴阻断巨噬细胞募集、全程直接促进巨噬细胞 M2 极化的双机制缓解 CIBP,且镇痛作用不依赖抗肿瘤效应,结合其临床安全、无成瘾性优势,为 CIBP 治疗提供新候选药物与靶点;机制上明确 TRPV1 是 THP 发挥早期镇痛的核心靶点,完善了 CIBP 神经‑免疫交互调控理论,同时补充了中药单体调控巨噬细胞极化的镇痛新机制;但研究存在局限性,仅使用雄性小鼠、单一肺癌细胞系,未建立完整量效关系,体外浓度与体内血浆浓度存在差异,采用巨噬细胞系而非原代细胞,且仅用经典标志物表征极化未做功能验证,未来需开展性别差异、多肿瘤模型、药代动力学及原代细胞功能验证等研究以支撑临床转化。

本文中使的图片来源于Pubmed,因客观原因未能与权利人取得联系。本平台出于学术交流目的引用,无意侵犯原作者权益。如权利人认为不妥,请及时联系公众号后台,我们将立即删除或协商解决。

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  1. CONNECT:[ UseTime:0.001137s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001672s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000977s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.001355s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001376s ]
  6. SELECT * FROM `set` [ RunTime:0.005168s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001532s ]
  8. SELECT * FROM `article` WHERE `id` = 530159 LIMIT 1 [ RunTime:0.001473s ]
  9. UPDATE `article` SET `lasttime` = 1776739988 WHERE `id` = 530159 [ RunTime:0.005137s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000736s ]
  11. SELECT * FROM `article` WHERE `id` < 530159 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.002670s ]
  12. SELECT * FROM `article` WHERE `id` > 530159 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.008321s ]
  13. SELECT * FROM `article` WHERE `id` < 530159 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.022804s ]
  14. SELECT * FROM `article` WHERE `id` < 530159 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.033659s ]
  15. SELECT * FROM `article` WHERE `id` < 530159 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.036807s ]
0.280254s