当前位置:首页>南京>南京中医药大学附属医院丨牛膝甾酮通过 AMPK 通路调控脂代谢与自噬,改善膝骨关节炎滑膜炎

南京中医药大学附属医院丨牛膝甾酮通过 AMPK 通路调控脂代谢与自噬,改善膝骨关节炎滑膜炎

  • 2026-06-01 20:45:00
南京中医药大学附属医院丨牛膝甾酮通过 AMPK 通路调控脂代谢与自噬,改善膝骨关节炎滑膜炎

本研究以膝骨关节炎(KOA)滑膜炎为核心靶点,采用 ACLT 构建大鼠 KOA 模型,设置假手术、模型、低中高剂量牛膝甾酮(CYA)及阳性药塞来昔布组,结合非靶向代谢组学、细胞实验与分子验证,先明确 CYA 对滑膜炎症的改善作用,再筛选其调控的核心代谢通路,进而在成纤维样滑膜细胞(FLS)上验证 CYA 对增殖、凋亡、脂代谢及自噬的影响,并通过 AMPK 抑制剂 Compound C 与自噬抑制剂 3-MA 进行反向验证,最后用分子对接、动力学模拟与 SPR 证实 CYA 与 AMPK 的高亲和力;结果表明,CYA 可直接激活 AMPK 通路,恢复脂代谢稳态、促进保护性自噬,抑制 FLS 异常增殖与炎症因子释放,从而缓解 KOA 滑膜炎,且安全性良好,为 KOA 治疗提供天然产物新候选与机制新靶点。

研究设计

构建 ACLT 诱导的 KOA 大鼠模型并给予不同剂量 CYA 干预,通过组织病理、ELISA、Western blot、q-PCR 评估滑膜炎症与全身炎症水平;采用非靶向代谢组学分析 CYA 对 KOA 代谢谱的影响并聚焦脂代谢;分离培养 FLS,以 LPS 构建炎症模型,检测 CYA 对 FLS 增殖、凋亡的作用;检测 AMPK 通路、脂代谢及自噬相关分子表达,并用 Compound C、3-MA 分别抑制 AMPK 与自噬进行反向验证;通过分子对接、动力学模拟、SPR 明确 CYA 与 AMPK 的结合能力。

研究结果

CYA 可显著减轻 KOA 大鼠滑膜炎症、降低 IL-6、IL-1β、TNF-α 等炎症因子水平,且对主要脏器无明显病理损伤;非靶向代谢组学显示 CYA 可逆转 KOA 的代谢紊乱,显著改善脂代谢失衡;CYA 能抑制 LPS 诱导的 FLS 异常增殖并促进其凋亡;CYA 可激活 AMPK 通路,上调 p-AMPK、p-ACC、CPT1,下调 FASN、SREBP-1、SCD-1,恢复脂代谢稳态,同时提升 GSH、降低 MDA、减少中性脂滴沉积;CYA 通过 AMPK 通路促进 ULK1 磷酸化、上调 LC3B 与 Beclin1、下调 P62,增强自噬体形成与自噬流;Compound C 可逆转 CYA 对脂代谢与炎症的调控作用,3-MA 可逆转 CYA 对自噬、增殖与凋亡的影响;分子实验证实 CYA 与 AMPK 蛋白具有高亲和力。

Fig.1:证明 CYA 能缓解 KOA 大鼠滑膜组织炎症浸润,降低血清及滑膜中促炎因子水平,且使用剂量下生物安全性良好。

Fig.2-3:显示 KOA 模型存在显著代谢紊乱,CYA 可显著纠正代谢异常,核心调控脂代谢相关通路。

Fig.4:证实 CYA 在安全浓度范围内可抑制 FLS 异常增殖、促进 FLS 凋亡,改善滑膜炎关键细胞异常表型。

Fig.5:明确 CYA 可浓度依赖性激活 FLS 中的 AMPK 信号通路,上调 p-AMPK 表达。

Fig.6:证明 CYA 通过激活 AMPK 通路调控 FLS 脂代谢,抑制 AMPK 后该作用完全逆转。

Fig.7-8:证实 CYA 以 AMPK 依赖方式促进 FLS 自噬,提升自噬体形成与自噬流。

Fig.9:表明自噬抑制剂 3-MA 可逆转 CYA 对 FLS 增殖、凋亡的调控作用,自噬是 CYA 发挥效应的关键环节。

Fig.10:验证 CYA 通过激活 AMPK 通路发挥抗炎作用,抑制 AMPK 后抗炎效果消失。

Fig.11:从分子层面证实 CYA 与 AMPK 蛋白存在高亲和力特异性结合,为通路激活提供直接结构依据。

研究结论

本研究首次证实牛膝甾酮(CYA)可通过直接激活 AMPK 通路,同步调控脂代谢紊乱与促进保护性自噬,抑制滑膜细胞异常增殖与炎症反应,从而改善 KOA 滑膜炎,明确了 AMPK 作为 KOA 治疗关键靶点的价值,也为中药牛膝活性成分治疗 KOA 提供了高质量实验证据;CYA 兼具抗炎、调节代谢、促进自噬的多重作用,安全性良好,尤其适合合并代谢异常的 KOA 患者;但研究仍存在局限性,CYA 与 AMPK 结合的精细分子机制尚未完全阐明,其体内药代动力学特征未系统表征,未来需开展更深入的分子机制研究与临床转化探索。

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:0.000757s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000972s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000409s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000390s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000760s ]
  6. SELECT * FROM `set` [ RunTime:0.000292s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000768s ]
  8. SELECT * FROM `article` WHERE `id` = 565235 LIMIT 1 [ RunTime:0.003855s ]
  9. UPDATE `article` SET `lasttime` = 1780436464 WHERE `id` = 565235 [ RunTime:0.005410s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000347s ]
  11. SELECT * FROM `article` WHERE `id` < 565235 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000601s ]
  12. SELECT * FROM `article` WHERE `id` > 565235 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.021735s ]
  13. SELECT * FROM `article` WHERE `id` < 565235 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.016608s ]
  14. SELECT * FROM `article` WHERE `id` < 565235 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001633s ]
  15. SELECT * FROM `article` WHERE `id` < 565235 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.087499s ]
0.237635s