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IF13.0!一区TOP!东北农业大学用分子对接+干湿结合拿下TOP刊!识别免疫疾病治疗潜在靶点!

  • 2026-05-30 21:23:41
IF13.0!一区TOP!东北农业大学用分子对接+干湿结合拿下TOP刊!识别免疫疾病治疗潜在靶点!

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引言

💥线粒体自噬靶点突破自身免疫病治疗瓶颈!最新研究在《Journal of Advanced Research》期刊发表深度综述,首次证实GPX3/PIG3轴可通过调控线粒体质量控制抑制异常Th17分化。

该研究通过多组学分析与动物模型验证,发现激活该轴可使Th17细胞分化降低68.5%,其通过恢复线粒体自噬流将mtDNA泄漏率减少至激活组12.7%,为自身免疫疾病提供了营养干预新靶点。

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文献解读

标题:硒缺乏通过GPX3靶向PIG3驱动Th17细胞异常分化的新机制:线粒体自噬阻滞加剧了mtDNA的释放

发表期刊:Journal of Advanced Research

发表时间:2026年2月

影响因子:IF13.0/Q1

研究目的

本研究探讨硒缺乏通过下调GPX3及其靶点PIG3,破坏线粒体自噬流,导致线粒体DNA泄漏,进而驱动Th17细胞异常分化的新机制,为自身免疫疾病提供了潜在治疗靶点。

研究方法

系统性回顾架构:基于硒缺乏动物模型与临床样本,构建GPX3/PIG3轴失调通过线粒体自噬流阻断与mtDNA泄漏,驱动Th17细胞异常分化的分子级联,系统阐明其从氧化应激累积、线粒体稳态失衡到自身免疫应答放大的动态演变规律,并揭示其在连接营养缺乏与自身免疫病发生中的枢纽机制。

综述研究方法:遵循“表型确认—通路解析—功能验证—干预验证”的递进逻辑,通过多组学分析与体内外模型验证,阐明本研究以硒-GPX3-PIG3-线粒体自噬为核心轴,在突破传统氧化应激视角、系统揭示线粒体质量控制失调致免疫紊乱、及确立营养-线粒体-免疫轴为治疗新靶点方面形成关键机制突破。

主要结果

01

RNA-seq结果分析

硒缺乏组脾脏中1521个基因表达差异,其中GPX3变化最显著,GO与KEGG分析显示差异基因与Th17细胞分化等免疫通路相关(图1)。

图1.脾脏转录组测序结果分析

02

硒缺乏通过GPX3诱导异常Th17细胞分化

体内外实验证实,硒缺乏或GPX3敲低均显著上调IL-17A、RORγt等Th17标志物表达,促进Th17细胞异常分化(图2)。

图2.硒缺乏或GPX3敲除诱导猪脾脏Th17细胞异常分化

03

硒缺乏通过下调GPX3活性进而降低PIG3表达

分子对接与Co-IP证实GPX3与PIG3存在直接相互作用,硒缺乏导致GPX3蛋白和PIG3表达均显著下降(图3)。

图3.硒缺乏通过GPX3靶向调节PIG3

04

硒缺乏通过GPX3靶向PIG3降低抗氧化能力并诱导线粒体功能障碍

GPX3敲低导致ROS、H2O2水平升高,ATP含量及ATP酶活性显著降低,PIG3过表达可逆转此损伤(图4)。

图4.PIG3过表达减轻GPX3敲低诱导的氧化应激并恢复线粒体功能

05

硒缺乏通过GPX3靶向PIG3导致线粒体自噬流阻断与线粒体动力学失衡

硒缺乏或GPX3敲低导致线粒体融合基因Mfn1等表达显著下调而分裂基因Drp1上调,透射电镜显示线粒体数量增多并伴有过度分裂与自噬现象(图5)。

图5.PIG3过表达缓解GPX3敲除诱导的线粒体融合和分裂失衡

GPX3敲低显著增强p62与LC3B荧光信号,mCherry-GFP-LC3B双标腺病毒示踪证实自噬体-溶酶体融合受阻,PIG3过表达可恢复自噬流(图6)。

图6.PIG3恢复了由GPX3敲低引起的线粒体自噬流阻滞

06

硒缺乏通过GPX3-PIG3轴诱导线粒体DNA泄漏

GPX3敲低导致mtDNA复制相关基因(如TFAM)及cGAS-STING通路基因表达显著上调,PicoGreen染色直接观察到mtDNA胞质泄漏(图7)。

图7.PIG3过表达缓解GPX3敲除诱导的mtDNA泄漏

07

GPX3-PIG3轴功能障碍通过阻断线粒体自噬并加剧mtDNA释放驱动Th17分化

GPX3敲低显著促进Th17分化,PIG3过表达可抑制该过程,证实该轴是调控Th17分化的核心通路(图8)。

图8.PIG3过表达抑制了由GPX3敲低诱导的Th17细胞分化异常

08

GPX3-PIG3轴功能障碍通过阻断线粒体自噬并加剧mtDNA释放驱动Th17分化

自噬流抑制剂Baf-A1可逆转PIG3过表达的保护作用,加剧mtDNA泄漏并重新促进Th17分化,证实自噬流畅通是关键(图9)。

图9.Baf-A1通过阻断线粒体自噬并加剧线粒体DNA泄漏,减弱了PIG3过表达对Th17细胞分化的抑制作用

文章小结

硒缺乏通过GPX3-PIG3轴抑制线粒体自噬,导致线粒体功能障碍和mtDNA泄漏,从而驱动Th17细胞异常分化,为治疗Th17相关的自身免疫疾病提供了新的潜在靶点。

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  1. CONNECT:[ UseTime:0.000548s ] mysql:host=127.0.0.1;port=3306;dbname=h_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000660s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000342s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000348s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000583s ]
  6. SELECT * FROM `set` [ RunTime:0.000247s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000593s ]
  8. SELECT * FROM `article` WHERE `id` = 518642 LIMIT 1 [ RunTime:0.000505s ]
  9. UPDATE `article` SET `lasttime` = 1780236893 WHERE `id` = 518642 [ RunTime:0.000771s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000246s ]
  11. SELECT * FROM `article` WHERE `id` < 518642 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000500s ]
  12. SELECT * FROM `article` WHERE `id` > 518642 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000377s ]
  13. SELECT * FROM `article` WHERE `id` < 518642 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000830s ]
  14. SELECT * FROM `article` WHERE `id` < 518642 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000819s ]
  15. SELECT * FROM `article` WHERE `id` < 518642 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000902s ]
0.104594s