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IF8.3!南京医科大学“国自然+多组学”力作拿下一区TOP!鼠尾草提取物口服竟能抗新生血管!

  • 2026-04-20 04:40:37
IF8.3!南京医科大学“国自然+多组学”力作拿下一区TOP!鼠尾草提取物口服竟能抗新生血管!

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👁️‍🗨️ 眼内新生血管是致盲的主因,现有抗VEGF疗法存在耐药与侵入性局限。来自南京医科大学附属眼科医院的姜沁教授与薛劲松教授团队首次揭示天然化合物龙涎香醇可通过口服抑制PI3K-AKT-FOXO1通路,为眼病治疗带来全新突破。

01

研究思路

02

文献简介

标题:全面的多组学和药代动力学揭示了Sclareol在抑制眼部新生血管形成中的作用

发表期刊:Phytomedicine

发表时间:2025年7月25

影响因子:8.3/Q1

03

研究背景

眼内新生血管易致盲,抗VEGF疗法有局限。南京医科大学姜沁、薛劲松教授发现:天然龙涎香醇可口服抑制PI3K-AKT-FOXO1通路带来新突破。

04

研究方法

团队采用OIR与CNV双动物模型,结合转录组与代谢组多组学、口服药代动力学、网络药理及分子模拟,并通过IGF-1中介回复实验反向验证,系统揭示龙涎香醇作用机制。

05

研究结果

1

SCL恢复内皮屏障功能

基于CCK-8、EdU及Ki67染色,SCL浓度依赖地抑制缺氧诱导的HRMECs增殖,诱导G0/G1期阻滞。FITC-dextran及TEER证实SCL降低通透性。免疫荧光显示SCL恢复ZO-1、β-catenin、VE-cadherin表达。

图1:SCL抑制增殖并改善紧密连接

2

SCL阻断血管生成能力

Transwell及划痕实验显示SCL抑制缺氧下HRMECs迁移。管形成及3D珠出芽实验证实SCL减少成管能力。离体脉络膜培养显示:SCL以浓度及时间依赖性方式抑制缺氧诱导的choroidal sprouting。

图2:SCL抑制迁移/成管/出芽

3

SCL穿透血-视网膜屏障

口服300mg/kg SCL后,血浆T_max=1h,C_max=5712ng/ml。视网膜C_max=6.17ng/mg,脉络膜C_max=6.67ng/mg,T_1/2分别为2.85h及3.98h。证实SCL可穿透BRB并在眼内蓄积。

图3:口服SCL药代曲线

4

SCL无眼外/眼内毒性

口服SCL未引起体重下降或心/肝/脾/肺/肾/视网膜结构异常。RBPMS/NeuN/IB4染色显示RGCs及血管无损伤,TUNEL阴性。证实该给药方案对幼鼠及成鼠均无显著毒性

图4:SCL安全性组织学评估

5

SCL体内抗新生血管效应

OIR模型中,SCL减少无血管区、新生血管簇及丝状伪足。CNV模型中,SCL降低IB4染色面积、OCT/OCTA病变范围及FFA渗漏。SCL联合Eylea疗效优于单用,高剂量SCL等效于Eylea。

图5:SCL减轻OIR/CNV病变

6

SCL克服抗VEGF耐药

对Eylea耐药的老年CNV小鼠中,SCL单用或联合Eylea显著减少CNV面积及渗漏。SCL上调ZO-1表达并恢复EC间紧密连接,而Eylea对老年小鼠ZO-1无改善作用

图6:RNA-seq富集分析

7

SCL调控代谢重编程

SCL降低缺氧下EC的ECAR及OCR,抑制糖酵解/线粒体呼吸。减少葡萄糖摄取、乳酸、丙酮酸、NAD⁺/NADPH比值、ROS、MDA,升高CAT/GSH-Px/SOD活性及GSH/GSSG比值。

图7:ECAR/OCR及氧化应激

8

SCL调控FOXO1核转位

SCL降低缺氧诱导的p-PI3K、p-AKT、p-FOXO1及胞浆FOXO1,增加核内FOXO1下调Cyclin D1/E1,上调P21/P27。免疫荧光证实SCL促进FOXO1核转位

图8:Western及免疫荧光验证

9

IGF-1回复验证

IGF-1激活PI3K-AKT后,逆转SCL对FOXO1核转位的诱导。回复实验显示:IGF-1消除SCL对增殖、迁移、成管、出芽、糖酵解、线粒体呼吸的抑制作用。体内OIR/CNV模型同样验证。

图9:IGF-1逆转SCL效应

06

总结

南京医科大学姜沁、薛劲松教授(共同通讯)发现:天然龙涎香醇口服可抑制PI3K-AKT-FOXO1通路,抗眼内新生血管。双模型+多组学+药代+中介分析揭示机制,联合抗VEGF可克服耐药。

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  1. CONNECT:[ UseTime:0.000507s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000708s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000332s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000338s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000472s ]
  6. SELECT * FROM `set` [ RunTime:0.000192s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000578s ]
  8. SELECT * FROM `article` WHERE `id` = 532954 LIMIT 1 [ RunTime:0.000442s ]
  9. UPDATE `article` SET `lasttime` = 1776914112 WHERE `id` = 532954 [ RunTime:0.000958s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000234s ]
  11. SELECT * FROM `article` WHERE `id` < 532954 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000435s ]
  12. SELECT * FROM `article` WHERE `id` > 532954 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000388s ]
  13. SELECT * FROM `article` WHERE `id` < 532954 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000719s ]
  14. SELECT * FROM `article` WHERE `id` < 532954 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000696s ]
  15. SELECT * FROM `article` WHERE `id` < 532954 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001109s ]
0.076599s