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IF9.0!南京医科大学构建迄今最大规模人类肺组织单细胞eQTL图谱,拿下《Cell》子刊!

  • 2026-03-20 16:27:46
IF9.0!南京医科大学构建迄今最大规模人类肺组织单细胞eQTL图谱,拿下《Cell》子刊!

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肺癌遗传易感研究领域中,🔬bulk eQTL分析难以捕捉细胞类型特异性调控机制,多数 GWAS 位点的功能背景仍不明确,🔈精准解析肺癌遗传变异的细胞层面作用亟待突破。

南京医科大学马红霞 / 沈红兵 / 马猛教授团队在《Cell Genomics》发表重磅成果,依托单细胞eQTL mapping核心技术,构建迄今最大规模人类肺组织单细胞 eQTL 图谱,整合 NSCLC GWAS 数据揭示细胞类型特异性遗传调控,为肺癌易感机制研究提供🚀核心资源与全新视角!

文献解读

文章题目:单细胞eQTL定位揭示了肺癌中细胞类型特异性的遗传调控

发表期刊:Cell Genomics

发表时间:2026年3月11日

影响因子:IF9.0

研究背景

全基因组关联研究(GWASs)已识别出50多个肺癌风险位点;然而,由于体质表达性状基因座(eQTL)分析的局限性,这些遗传机制的具体细胞背景仍不明确。

研究方法

利用多重单细胞RNA测序分析了222名供体。识别出4,341个独立eQTL,涵盖17种细胞类型,其中超过60%的sc-eQTLs和51%的eGenes具有细胞类型特异性,且在配对大组数据集中检测不到52%。通过GWASs的非小细胞肺癌整合显示,上皮细胞和免疫细胞是遗传易感性的关键因素,识别出28个候选基因位于已知风险位点,24个位于新区域。

图1:图解摘要。

研究结果

一、中国肺部SCeQTL队列的特征

研究在LungSCeQTL队列,探究遗传变异对基因表达的细胞特异性影响。队列含2021.10-2022.7因肺癌或非肿瘤肺病行肺切除的226名中国人,采集样本并基因分型,经质控和填补后得4,838,930个SNPs。肺组织解离后用混合策略测870,061个细胞scRNA- seq,评估批次效应。最终保留222人 562,255个细胞,均2,533个/供体,供体无亲缘,年龄、性别及吸烟情况各异(图2)。

图2:中国肺癌SCeQTL队列中的人类肺细胞图谱。

二、在中国肺癌SCeQTL队列中跨细胞类型绘制eQTL图谱

借助FastQTL对1 种细胞做顺式 eQTL分析,考量协变量后鉴定出特定数量的eQTL与eGene,其数量因细胞捕获存在差异。多数具细胞特异性,eGene多在多细胞表达且相关细胞共表达强。MASHR评估显示eQTL信号在细胞类型间方向一致性高,部分幅度共享,谱系内更高。近半eGene在多种细胞被鉴定,条件分析表明谱系内细胞遗传调控重叠强,回归分析揭示eSNP与连锁不平衡的关系(图3)。

图3:在中国肺癌SCeQTL队列中跨细胞类型绘制eQTL图谱。

三、sc-eQTL与批量eQTL及既往研究的比较

研究将sc-eQTLs与Bulk219数据集对比,发现等位基因方向一致性为 83.9% ,但仅51.7%的sc-eQTLs在 Bulk219数据集FDR<0.05时显著,反向及条件分析凸显sc-eQTL定位优势;与Natri等人肺纤维化研究对比,48.6% 的sc-eQTLs可在对应细胞类型验证,重现率有差异,部分位点关联不同或因组织及种族差异;此外,sc-eQTL分析的eSNPs与染色质可及性峰整合显示其具调控潜力图4)。

图4:sc-eQTL与批量eQTL及既往研究的比较。

四、利用sc-eQTLs从肺癌易感位点中鉴定因果基因

为深化对肺癌GWAS位点理解,整合多源数据,从31个位点选33个变异,经数据库整合鉴定出127个分4级的候选致病基因。一级28个基因呈现复杂细胞特异调控模式,如部分在上皮或免疫细胞共定位,有的在不同细胞有相反信号,还有的广泛调控。同时发现肺癌相关变异可跨细胞调控多基因,近四分之一易感位点与多个候选基因共定位,凸显sc-eQTL分析对揭示肺癌遗传易感性机制的关键作用(图5)。

图5:肺癌GWAS位点中识别靶向易感基因的解析。

五、全转录组关联分析揭示新型肺癌易感基因

为从细胞层面找更多肺癌易感基因,开展TWASs,鉴定出250个相关基因,经共定位分析得30个易感基因,多数相关变异在对应细胞的snATAC-seq 峰内。近半新基因在免疫细胞共定位,部分来自上皮细胞,部分位点在欧洲人群获验证。DLX3作为新基因,其变异影响LUAD风险,功能分析显示它调控 AT2细胞状态。此外,rs4822455在不同细胞与不同基因共定位,体现遗传变异多效性,共同影响肺癌易感性(图6)。

图6:新型肺癌易感位点中识别靶向易感基因的解析。

六、通过共定位结果鉴定的可药物靶点

为打通遗传架构与临床治疗转化,用数据库评估本研究NSCLC候选基因成药可能性。已确定和新位点中,分别有32.1%(9/28)与20.8%(5/24)的基因与药物有相互作用,具临床靶点潜力。除ROS1外,还发现 zolbetuximab和IXAZOMIB两个新靶点,为药物研发与再利用提供方向(图7)。

图7:DLX3在AT2细胞中的功能机制。

文章小结

本研究为肺部sc-eQTLs提供了宝贵资源,揭示了遗传变异如何以细胞类型特异性方式调节基因表达,促进肺癌易感性。

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  1. CONNECT:[ UseTime:0.000536s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000777s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000369s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.006831s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000513s ]
  6. SELECT * FROM `set` [ RunTime:0.000196s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000609s ]
  8. SELECT * FROM `article` WHERE `id` = 510579 LIMIT 1 [ RunTime:0.000806s ]
  9. UPDATE `article` SET `lasttime` = 1774302407 WHERE `id` = 510579 [ RunTime:0.011136s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000253s ]
  11. SELECT * FROM `article` WHERE `id` < 510579 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000430s ]
  12. SELECT * FROM `article` WHERE `id` > 510579 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000688s ]
  13. SELECT * FROM `article` WHERE `id` < 510579 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000704s ]
  14. SELECT * FROM `article` WHERE `id` < 510579 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000730s ]
  15. SELECT * FROM `article` WHERE `id` < 510579 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.004967s ]
0.122944s