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IF 7.4!恭喜南京医科大学院长“国自然”最新研究拿下一区TOP !

  • 2026-03-31 09:42:33
IF 7.4!恭喜南京医科大学院长“国自然”最新研究拿下一区TOP !

主动脉夹层还在“破”了再开刀🤔?

📍南京医科大学这项研究,把治疗窗口往前推了一大步。

👉常规诊疗现状:胸主动脉夹层TAD)发病凶险,目前临床只能依靠急诊手术救治,长期以来是药物研发的“无人区”。

✨两大转化突破路径:

✅ biomarker潜力:TAD患者血浆ELA↓AUC=0.77),ELISA可测低成本早筛。

✅ 机制新发现:ELA通过抑制NETosisNLRP3通路,调控细胞互作网络。

不是“又多一个分子”,是填补TAD无药可治的临床空白👏!

如果你也想进行生信分析,快联系发发生信,你的下一篇顶刊论文,或许就从这里开始!

分析框架

📌三大维度的研究分析框架已整理,点击图片查看。(10分钟获取核心要点)

 1.研究构思 I 2. 主要疗效 3. 国自然热点关联

你还在观望什么?【发发生信】定制思路,全面数据分析,下一篇高分SCI就是你!

文献解读

标题:ELABELA通过维持血管平滑肌细胞稳态和调节NETosis来预防胸主动脉夹层

发表期刊:Arteriosclerosis Thrombosis And Vascular Biology

影响因子:7.4/Q1

科学验证因果,方法决定高度。完整生信方案,助力您的研究登上更高学术舞台。

研究背景

主动脉夹层TAD)是一种缺乏有效药物治疗的致命性心血管疾病。血管平滑肌细胞VSMC稳态失衡是其关键致病机制,而新型内源性多肽ELAELABELA)的心血管保护作用尚待阐明。

研究方法

采用两种TAD小鼠模型结合ELA输注,通过转录组测序、细胞共培养、分子 docking 及临床样本验证,系统探究ELA调控VSMC稳态及中性粒细胞NETosis的分子机制。

研究结果

01

ELA抑制TAD进展:

本研究首次揭示了ELA在胸主动脉夹层(TAD)中的保护作用。在两种经典的TAD小鼠模型中,持续输注ELA肽均可显著降低小鼠的死亡率【图1D】。

1.输注ELA(ELABELA)

可减轻小鼠胸主动脉夹层(TAD)的形成,

并维持血管平滑肌细胞(VSMC)稳态

通过主动脉大体标本【图1B】、超声及组织学染色【图1E, 1H】观察发现,ELA治疗有效抑制了主动脉扩张,并减轻了血管中膜弹性纤维降解【图1F, 1G】,证实ELA能有效延缓TAD病理进程。

02

ELA维持VSMC稳态:

TAD的关键病理特征是血管平滑肌细胞(VSMC稳态失衡。研究发现,ELA输注显著提升了TAD小鼠主动脉中收缩型VSMC标志蛋白的表达【图1I-1L】,同时减少了细胞凋亡【图1M-1O】。

1.输注ELA(ELABELA)

可减轻小鼠胸主动脉夹层(TAD)的形成,

并维持血管平滑肌细胞(VSMC)稳态

此外,ELA还抑制了基质金属蛋白酶活性【图1P, 1Q】,防止细胞外基质降解,从而保护主动脉壁结构完整。

03

ELA逆转VSMC损伤:

为验证ELA的直接作用,研究者用血小板衍生生长因子(PDGF)处理人主动脉VSMC。PDGF刺激后,细胞内源性ELA表达显著下降【图2A-2C】。

图2.外源性ELABELA(ELABELA)

给药通过APJ

(血管紧张素受体AT1相关受体蛋白)途径,

防止血管平滑肌细胞(VSMC)

稳态紊乱和细胞外基质(ECM)降解

补充外源性ELA则有效逆转了VSMC由收缩向合成表型的转换【图2D】,并抑制了高浓度PDGF引发的细胞凋亡【图2F, 2G】。这些保护作用可被APJ拮抗剂ML221阻断【图2H-2K】,证实ELA通过其受体APJ发挥对VSMC的保护功能。

04

ELA保护依赖APJ:

为进一步在体内验证APJ的关键作用,研究者给TAD小鼠输注ELA的同时加入APJ拮抗剂ML221。

图3.艾拉蛋白(ELABELA)

通过APJ(血管紧张素受体AT1相关受体蛋白)

发挥作用,减轻小鼠胸主动脉夹层(TAD)的病情发展

结果显示,ML221几乎完全逆转了ELA带来的生存获益【图3D】和抑制主动脉扩张的效果【图3E, 3F】。各组小鼠血压和心率无显著差异【图3I-3L】,表明ELA直接作用于血管壁,而非通过影响血流动力学。

05

ELA调控炎症NETs:

通过主动脉转录组测序分析,研究者发现ELA输注显著抑制了NOD样受体信号通路NETs形成相关基因的表达【图4C, 4D】。

图4.NLRP3(NLR家族含pyrin结构域蛋白3)

和NET(中性粒细胞胞外诱捕网)

的形成可能在ELABELA(ELA)

对胸主动脉夹层(TAD)的作用机制中发挥作用

进一步验证显示,ELA抑制了主动脉组织中NLRP3炎症小体及IL-1β的激活【图4E-4G】,并减少了循环中NETs标志物水平【图4H-4M】,提示ELA通过抗炎和调控NETs发挥作用。

06

ELA双重抑制NETs:

机制上,研究者发现了一个双向调控环路。首先,ELA直接作用于中性粒细胞,通过抑制NOX2介导的活性氧产生阻断NETs形成【图5C-5G】。

图5. ELA直接抑制中性粒细胞NETosis

其次,在VSMC中,ELA通过APJ激活AMPK通路,抑制PDGF诱导的NLRP3/IL-1β分泌【图6A-6C, 6P, 6Q】,从而减少由VSMC源性IL-1β触发的NETosis(【图6E, 6G】。

图6.ELA(ELABELA)

通过抑制NLRP3(NLR家族pyrin结构域包含蛋白3)

相关的IL(白细胞介素)-1β产生来

抑制NET(中性粒细胞胞外诱捕网)形成

07

NETs反噬VSMC:

有趣的是,NETs形成后又会反过来作用于VSMC。

图6.ELA(ELABELA)通过抑制NLRP3

(NLR家族pyrin结构域包含蛋白3)

相关的IL(白细胞介素)-1β产生

来抑制NET(中性粒细胞胞外诱捕网)形成

研究发现,NETs可激活VSMC上的TLR4,触发NLRP3炎症小体活化【图6L, 6M】,导致VSMC自身发生表型转换【图6I-6K】,形成正反馈恶性循环。而ELA能同时作用于循环两端,有效遏制TAD发展。

08

临床验证:

最后,研究者在临床样本中验证了发现的临床意义。与健康对照相比,TAD患者主动脉组织中ELA及APJ受体表达均显著降低【图7A-7D】,血浆ELA水平明显下降而NETs标志物显著升高【图7E-7G】。

图7.ELA(ELABELA)基因表达

在人类胸主动脉夹层(TAD)中呈现下调趋势

相关性分析显示血浆ELA与NETs水平呈负相关【图7H】。低血浆ELA对TAD具有潜在诊断价值【图7I】,且与更高患病风险相关【图7J】,提示ELA有望成为TAD诊断和管理的新型生物标志物

本研究发现ELA蛋白能够保护血管平滑肌细胞,减轻主动脉损伤,从而延缓主动脉夹层的进展。同时发现主动脉夹层患者体内ELA水平降低,提示ELA有望成为该疾病的新型治疗靶点。

想学习如何复刻这类高分研究的同学,欢迎联系发发生信!

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从零突破到SCI发表

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  1. CONNECT:[ UseTime:0.000560s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000832s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000341s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000270s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000493s ]
  6. SELECT * FROM `set` [ RunTime:0.000192s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000933s ]
  8. SELECT * FROM `article` WHERE `id` = 506120 LIMIT 1 [ RunTime:0.000706s ]
  9. UPDATE `article` SET `lasttime` = 1775040039 WHERE `id` = 506120 [ RunTime:0.000838s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000247s ]
  11. SELECT * FROM `article` WHERE `id` < 506120 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000584s ]
  12. SELECT * FROM `article` WHERE `id` > 506120 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000980s ]
  13. SELECT * FROM `article` WHERE `id` < 506120 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.009781s ]
  14. SELECT * FROM `article` WHERE `id` < 506120 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.016693s ]
  15. SELECT * FROM `article` WHERE `id` < 506120 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.009148s ]
0.128675s