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IF52.7!广州医科大学团队借多组学MR+UKB等六大数据库,破解COPD遗传缺失难题,荣登一区TOP!

  • 2026-02-15 20:00:11
IF52.7!广州医科大学团队借多组学MR+UKB等六大数据库,破解COPD遗传缺失难题,荣登一区TOP!

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 ★ 引言 ★ 

广州医科大学任皮鑫团队联合多家机构,运用多组学孟德尔随机化方法,整合蛋白组与转录组数据,成功鉴定了 SERPING1是慢性阻塞性肺病的关键调控蛋白。研究发现,该蛋白水平与肺功能下降速率显著相关,并在欧洲与亚洲人群中呈现表达差异,提示其具备作为跨种族生物标志物与治疗靶点的潜力。研究通过人群队列与动物模型双重验证,为 COPD 的早期干预提供了新方向。

借用多组学、UKB等数据库发表高分文章,关注生信领航站。

干货文章持续更新,点击关注,系统学习不迷路。

可借鉴学习点

  • 数据整合流程:可参照其统一化处理多来源QTL与GWAS摘要数据的步骤。

  • 因果证据分级方法:采用SMR+TSMR+共定位分析三级验证体系,提升结果可靠性。

  • 跨数据库验证思路:同步利用UK Biobank、ECOPD等开放队列进行临床‑分子层面互证。

  • 细胞‑动物联动设计:通过scRNA-seq筛选靶细胞,再使用AAV基因治疗进行体内功能回复实验。

研究创新点

  • 多组学MR整合策略:首次系统性整合蛋白组(pQTL)、转录组(eQTL)与GWAS数据,构建多层因果推断框架。

  • 跨种族动态发现:揭示SERPING1在欧洲与亚洲人群中的表达差异及其对COPD进展的差异化影响。

  • 细胞机制定位:结合单细胞测序与空间转录组,精准锁定肺成纤维细胞为SERPING1的核心作用靶点。

  • 闭环验证体系:从人群队列→动物模型→细胞实验,实现“数据‑机制‑干预”全链条验证。

文献解读

  研究背景  

慢性阻塞性肺病(COPD)是全球第三大致死疾病,目前缺乏有效治疗手段。传统遗传研究因混杂因素多、因果推断难,无法精准锁定靶点。多组学孟德尔随机化整合基因、蛋白与表型数据,能有效克服这些局限,已在多项研究中成功鉴定出COPD的关键致病蛋白与治疗靶点,为攻克该疾病提供了新方向。

  研究方法  

  • 数据整合:整合GWAS、eQTL与pQTL等多源公共数据,构建统一分析格式。

  • 因果推断:运用多组学孟德尔随机化(SMR、两样本MR、共定位)对靶点进行三级证据分级。

  • 细胞定位:结合单细胞测序、空间转录组(gsMAP)与遗传分析(seismicGWAS),锁定核心作用细胞类型。

  • 验证体系:通过人群队列分析、体外细胞实验及动物模型干预,完成多层次机制验证。

主要成果

1

多组学MR精准锁定核心靶点

通过整合八个pQTL与两个eQTL数据集,并采用SMR、两样本MR与共定位分析三级验证,将 SERPING1 确定为COPD最高证据等级(Tier 1)的因果基因。其pQTL与降低的COPD风险及改善的FEV₁、FEV₁/FVC等肺功能指标显著相关。

图1 多组学共振识别SERPING1为COPD的致病靶点

图2 临床验证SERPING1作为UKB队列中COPD进展的生物标志物

2

大队列临床验证其短期预测价值

在UK Biobank近4.6万人群中证实,基线较高的血浆SERPING1水平与第一次随访时较慢的FEV₁年下降率显著相关。但在第二次随访时关联减弱,提示其更适于作为短期肺功能下降的生物标志物

3

揭示显著的跨种族表达异质性

SERPING1在欧洲与亚洲(中国)COPD患者中呈现表达方向相反的模式:欧洲患者中表达上调,而亚洲患者中表达下调。这种差异独立于年龄和吸烟状态,且与关键SNP rs28362951的等位基因频率分布部分相关。

图3 ECOPD队列显示欧洲和亚洲人群中的不同SERPING1表达

4

阐明其通过补体系统发挥作用

SERPING1作为补体C1抑制剂,其遗传信号与C1QA、C2、C3等补体成分的表达相互关联。多变量MR分析显示,调整补体因子后SERPING1的效应减弱,表明其对COPD的影响部分通过调控补体激活来实现。

5

单细胞与空间组学定位核心作用细胞

综合运用scRNA-seq、空间转录组及遗传定位分析(seismicGWAS, gsMAP),发现SERPING1的遗传信号与蛋白作用主要富集于肺成纤维细胞,其次为巨噬细胞,明确了其发挥功能的细胞场所。

6

体外实验证实其调控炎症与基质稳态

在人肺成纤维细胞中敲低SERPING1,会显著加剧CSE诱导的炎症因子(如IL-6, IL-8, IL-1β)释放,并破坏弹性纤维相关基因表达,验证了其在抑制成纤维细胞炎性转化及维持基质健康中的关键作用。

图4 多组学剖析识别SERPING1靶向效应细胞群体

图5 SERPING1体外调节肺纤维细胞中的炎症效应

7

体内基因治疗证实其治疗潜力

在香烟烟雾诱导的COPD小鼠模型中,AAV介导的肺特异性SERPING1过表达能显著改善肺功能、减轻肺泡隔破坏、抑制肺部炎症,并上调弹性纤维生成基因。该疗效主要通过作用于成纤维细胞实现。

图6 含乳SERPING1的AAVs可缓解CS暴露小鼠的肺泡中隔破坏并抑制炎症细胞因子

文章小结

本研究通过整合多源数据库,运用多组学孟德尔随机化方法,首次系统性鉴定出血浆蛋白SERPING1是 COPD 的关键因果靶点。研究证实其在欧洲与亚洲人群中的表达模式相反,可作为预测早期肺功能下降的短期生物标志物,并通过细胞与动物实验验证其通过调控补体系统及靶向肺成纤维细胞发挥保护作用,为 COPD 的精准防治提供了新靶点与思路。

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  1. CONNECT:[ UseTime:0.000500s ] mysql:host=127.0.0.1;port=3306;dbname=c460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000706s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.001889s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.001165s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000516s ]
  6. SELECT * FROM `set` [ RunTime:0.001808s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000622s ]
  8. SELECT * FROM `article` WHERE `id` = 469936 LIMIT 1 [ RunTime:0.005220s ]
  9. UPDATE `article` SET `lasttime` = 1772767279 WHERE `id` = 469936 [ RunTime:0.011184s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.001994s ]
  11. SELECT * FROM `article` WHERE `id` < 469936 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.007979s ]
  12. SELECT * FROM `article` WHERE `id` > 469936 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.006676s ]
  13. SELECT * FROM `article` WHERE `id` < 469936 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.018992s ]
  14. SELECT * FROM `article` WHERE `id` < 469936 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.017353s ]
  15. SELECT * FROM `article` WHERE `id` < 469936 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.024811s ]
0.174198s