当前位置:首页>南京>5.6/Q1,告别"对症治疗"!南京医一附院多组学研究发现CD83+巨噬细胞线粒体损伤是DPN的"始作俑者

5.6/Q1,告别"对症治疗"!南京医一附院多组学研究发现CD83+巨噬细胞线粒体损伤是DPN的"始作俑者

  • 2026-03-23 03:00:51
5.6/Q1,告别"对症治疗"!南京医一附院多组学研究发现CD83+巨噬细胞线粒体损伤是DPN的"始作俑者

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作者团队不仅自己建小鼠模型、做测序,还巧妙整合了GEO公共数据库中的多个单细胞和转录组数据集。他们先用Scissor算法在单细胞数据里“锁定”了与疾病进展最相关的细胞亚群——CD83+巨噬细胞;接着用hdWGCNA抓出关键基因模块;再用11种机器学习算法筛选出核心基因TIMM23;最后还构建了一个能预测疾病进展的PDRM评分系统。这一套“组合拳”下来,不仅机制挖得深,模型也建得稳。
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文章题:Multi-omics analysis identifies mitochondrial dysfunction in CD83+ macrophages as a key event in diabetic peripheral neuropathy progression

中文多组学分析鉴定CD83+巨噬细胞中线粒体功能障碍是糖尿病周围神经病变进展的关键事件

发表期刊:Neurobiol Dis

发表时间:2026年2月

影响因子:5.6

01. 研究背景

糖尿病周围神经病变(DPN)是一种高发的严重并发症,其进展机制尚不明确,导致临床缺乏有效干预手段。线粒体功能障碍被认为是其核心病理环节之一,而巨噬细胞介导的炎症反应也在疾病发展中起关键作用。然而,驱动DPN进展的具体巨噬细胞亚型及其分子机制仍未阐明,制约了精准诊疗策略的发展。因此,本研究旨在通过多组学整合分析,系统揭示DPN进展中具有线粒体代谢缺陷的关键巨噬细胞亚群,并探索其作为诊疗新靶点的潜力。


02. 研究方法

本研究首先构建了糖尿病周围神经病变(DPN)进展小鼠模型,通过神经传导速度、痛觉行为学评估及组织形态学分析进行鉴定与分组。随后,对小鼠背根神经节和坐骨神经进行转录组测序分析,结合公共单细胞与转录组数据集(GEO),运用Scissor算法识别与疾病进展最相关的细胞类型,并采用AUCell、hdWGCNA等方法评估线粒体代谢活性与基因模块。进一步通过机器学习构建了基于关键基因(NDUFA9, TIMM23, TOMM7)的进行性DPN相关线粒体评分(PDRM_score),并利用CIBERSORT、ESTIMATE等工具解析免疫微环境特征。在功能验证层面,通过体外高糖/高脂干预骨髓源性巨噬细胞(BMDM)、体内腺相关病毒介导的基因过表达,以及流式细胞术、免疫荧光、蛋白质印迹等技术,系统验证了TIMM23在巨噬细胞线粒体功能及DPN进展中的关键作用。最后,采用分子对接虚拟筛选了靶向TIMM23的潜在治疗化合物。

03. 研究结果

1. 线粒体功能障碍是DPN进展的核心特征

通过构建渐进性DPN小鼠模型,研究发现与未进展组相比,进展组小鼠的神经传导速度显著降低,痛觉阈值升高。转录组分析表明,在背根神经节和坐骨神经中,线粒体功能障碍是影响DPN进展的关键生物学过程。ATP浓度测量证实进展组ATP生成显著降低,MitoSOX检测显示进展组线粒体ROS水平更高。结论:线粒体代谢障碍是影响DPN进展的关键因素。

2. 鉴定与DPN进展相关的CD83+巨噬细胞

整合多组学数据与单细胞分析,发现巨噬细胞是与DPN进展最相关的细胞类型,其中Scissor+巨噬细胞占主导。巨噬细胞进一步分为四个亚型,其中CD83+巨噬细胞在DPN组中比例显著升高,且线粒体代谢评分最低。基因集富集分析显示CD83+巨噬细胞中线粒体相关代谢通路下调。流式细胞术与免疫荧光进一步验证了其在DPN进展中比例升高,并呈现M1极化趋势。

3. PDRM评分的构建

通过hdWGCNA识别出与CD83+巨噬细胞相关的基因模块,结合机器学习方法构建了基于NDUFA9、TIMM23和TOMM7表达的PDRM评分系统。该评分在训练与验证队列中均能有效区分DPN进展患者,并与线粒体代谢评分呈负相关,与炎症因子表达呈正相关。高PDRM评分组显示巨噬细胞迁移、趋化及NLRP3炎症通路显著激活。

4. PDRM评分与免疫微环境

高PDRM评分患者表现出独特的免疫细胞组成:幼稚B细胞和M1巨噬细胞增多,CD4+ T细胞减少。ESTIMATE分析显示其基质与免疫评分较低,免疫细胞浸润减少。此外,高评分患者对免疫检查点抑制剂(如CTLA4)的反应性较差,提示PDRM评分可作为评估DPN免疫治疗反应的潜在指标。

5. TIMM23是DPN进展巨噬细胞中的关键因子

在多个组织(DRG、坐骨神经、PBMC、骨骼肌)中,仅TIMM23在DPN患者中表达一致下调。超过65%的进展性DPN患者TIMM23表达降低。低TIMM23表达的巨噬细胞与雪旺细胞的相互作用增强,且糖脂代谢通路激活。在HG或高脂处理的BMDM中,TIMM23表达显著下调,证实其在糖尿病微环境中受抑制。

6. TIMM23靶向药物筛选

通过对1891种FDA批准药物进行虚拟筛选,鉴定出89种潜在TIMM23靶向化合物,其中乳果糖结合能最低(-6.257),显示其作为TIMM23靶向治疗DPN的潜力。对接分析表明精氨酸、苏氨酸和酪氨酸是主要结合位点。

04. 研究意义

本研究首次揭示了CD83+巨噬细胞及其线粒体功能障碍在糖尿病周围神经病变(DPN)进展中的关键作用,并提出了基于TIMM23的分子诊断与治疗新靶点,为DPN的精准干预提供了全新的免疫代谢视角。
(对生信文章分析感兴趣或需要生信分析服务的老师,欢迎关注禾苗一起交流)

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  1. CONNECT:[ UseTime:0.001082s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001915s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000659s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.009606s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001758s ]
  6. SELECT * FROM `set` [ RunTime:0.000728s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001510s ]
  8. SELECT * FROM `article` WHERE `id` = 482784 LIMIT 1 [ RunTime:0.001307s ]
  9. UPDATE `article` SET `lasttime` = 1775454121 WHERE `id` = 482784 [ RunTime:0.009127s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000740s ]
  11. SELECT * FROM `article` WHERE `id` < 482784 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001447s ]
  12. SELECT * FROM `article` WHERE `id` > 482784 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001323s ]
  13. SELECT * FROM `article` WHERE `id` < 482784 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.006223s ]
  14. SELECT * FROM `article` WHERE `id` < 482784 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.007117s ]
  15. SELECT * FROM `article` WHERE `id` < 482784 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.013581s ]
0.154212s