当前位置:首页>南京>南京中医药大学药学院丨灯盏花素通过Arg2-HIF-1α轴调控巨噬细胞极化,助力糖尿病溃疡血管新生与创面修复

南京中医药大学药学院丨灯盏花素通过Arg2-HIF-1α轴调控巨噬细胞极化,助力糖尿病溃疡血管新生与创面修复

  • 2026-05-31 20:57:25
南京中医药大学药学院丨灯盏花素通过Arg2-HIF-1α轴调控巨噬细胞极化,助力糖尿病溃疡血管新生与创面修复

本研究以糖尿病溃疡持续炎症与血管新生障碍为核心病理问题,构建糖尿病小鼠溃疡模型与高糖诱导巨噬细胞、内皮细胞体外模型,结合蛋白质组学、分子生物学与细胞能量代谢检测,发现灯盏花素可减轻糖尿病小鼠创面病理损伤、促进胶原沉积与血管新生,抑制促炎因子、提升抗炎与促血管生成因子分泌,推动巨噬细胞向修复型 M2 表型极化;机制上,高糖上调线粒体精氨酸酶 2(Arg2),激活下游 HIF-1α 通路引发巨噬细胞线粒体功能障碍与糖酵解代谢重编程,锁定促炎 M1 表型并损伤内皮血管新生,而灯盏花素直接结合 Arg2 并抑制其表达,逆转线粒体代谢异常、恢复 M2 极化,最终改善血管新生加速创面愈合,证实 Arg2 是灯盏花素发挥疗效的关键靶点,为糖尿病溃疡免疫代谢精准治疗提供实验依据。

研究设计

首先建立糖尿病小鼠溃疡模型,评估灯盏花素对创面愈合、病理损伤、胶原沉积及血管新生的影响;再检测其对创面炎症水平与巨噬细胞 M1/M2 极化的调控作用;通过蛋白质组学与细胞能量代谢分析筛选关键靶点,聚焦线粒体 Arg2;利用分子对接与微量热泳动验证灯盏花素与 Arg2 的直接结合,再通过 Arg2 过表达与沉默实验,明确其介导线粒体代谢重编程、HIF-1α 通路激活及巨噬细胞极化的作用,最后通过巨噬细胞条件培养基培养内皮细胞,验证该通路对血管新生的影响,完整阐明灯盏花素的作用机制。

研究结果

灯盏花素可显著加快糖尿病小鼠创面闭合、减轻病理损伤、增加胶原沉积与血管新生,且无降糖作用;能降低创面炎症浸润,抑制 IL-1β、TNF-α,提升 IL-10 与 VEGF,促进巨噬细胞 M2 极化;高糖诱导巨噬细胞呈 M1 表型并损伤内皮细胞增殖、迁移与管形成,灯盏花素可逆转该损伤;蛋白质组学显示糖尿病创面以糖酵解通路异常为主,灯盏花素可恢复氧化磷酸化;Arg2 在糖尿病创面与高糖巨噬细胞中高表达,灯盏花素可直接结合并抑制 Arg2;Arg2 过表达会加剧线粒体功能障碍、激活 HIF-1α、促进糖酵解并抑制 M2 极化,加重内皮血管新生损伤,而 Arg2 沉默可模拟灯盏花素的保护作用。

Fig.1:灯盏花素能加速糖尿病小鼠创面愈合,改善创面病理结构、促进胶原沉积与血管新生,且不影响血糖与体重。

Fig.2:灯盏花素可减轻糖尿病创面炎症,抑制巨噬细胞 M1 极化、促进 M2 极化,调节炎症与促血管生成因子分泌。

Fig.3:灯盏花素在体外逆转高糖对巨噬细胞的 M1 极化诱导,其条件培养基可恢复内皮细胞的增殖、迁移与血管形成能力。

Fig.4:灯盏花素修复巨噬细胞线粒体结构与功能,抑制糖酵解、恢复氧化磷酸化,下调 HIF-1α 并提升线粒体调控蛋白表达。

Fig.5:Arg2 是灯盏花素的关键作用靶点,在糖尿病创面巨噬细胞中高表达,灯盏花素可直接结合 Arg2 并抑制其表达。

Fig.6:Arg2 过表达会加剧巨噬细胞线粒体损伤与代谢重编程,锁定 M1 表型,灯盏花素可逆转该异常。

Fig.7:巨噬细胞 Arg2 过表达会加重内皮细胞血管新生障碍,灯盏花素可改善该损伤。

Fig.8-9:沉默 Arg2 可模拟灯盏花素的作用,恢复巨噬细胞线粒体代谢与 M2 极化,提升内皮细胞血管新生能力,证实 Arg2 是核心靶点。

研究结论

本研究首次证实线粒体 Arg2 是糖尿病溃疡中驱动巨噬细胞代谢重编程与极化失衡的关键分子开关,灯盏花素可通过靶向 Arg2 抑制下游 HIF-1α 通路,逆转巨噬细胞糖酵解代谢异常、恢复 M2 极化,提升抗炎与促血管生成因子分泌,进而改善内皮血管新生、加速糖尿病创面愈合,明确了灯盏花素治疗糖尿病溃疡的免疫代谢新机制,为其临床拓展应用与糖尿病溃疡精准治疗提供实验支撑;但研究存在局限性,未排除灯盏花素对创面成纤维细胞等其他细胞的作用,仅采用高脂饮食联合链脲佐菌素诱导的糖尿病模型,未在 db/db 等遗传性糖尿病模型中验证,且仅明确主要成分野黄芩苷的作用,未探究灯盏花素中其他成分的协同或拮抗效应。

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:0.000685s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000658s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000281s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000309s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000493s ]
  6. SELECT * FROM `set` [ RunTime:0.000201s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000537s ]
  8. SELECT * FROM `article` WHERE `id` = 563000 LIMIT 1 [ RunTime:0.000484s ]
  9. UPDATE `article` SET `lasttime` = 1780506073 WHERE `id` = 563000 [ RunTime:0.005373s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.004685s ]
  11. SELECT * FROM `article` WHERE `id` < 563000 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.056553s ]
  12. SELECT * FROM `article` WHERE `id` > 563000 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.003069s ]
  13. SELECT * FROM `article` WHERE `id` < 563000 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001221s ]
  14. SELECT * FROM `article` WHERE `id` < 563000 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000791s ]
  15. SELECT * FROM `article` WHERE `id` < 563000 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.013537s ]
0.250481s