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IF15.7!南京医科大学借GWAS+MR轻松拿下双一区!思路简单易复刻

  • 2026-04-01 11:41:09
IF15.7!南京医科大学借GWAS+MR轻松拿下双一区!思路简单易复刻
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引言
INTRODUCTION

肺 - 胃肠道共病危害高于单一疾病,肠肺轴(GLA)是核心调控通路,但其综合遗传结构不明,缺乏系统性遗传机制解析。

南京医科大学研究团队整合欧、亚、非三人群 GWAS 数据集,结合多维度分析,首次解析二者共享遗传特征,发现肠道微生物介导通路及全新多效性位点,填补研究空白,为共病精准防控提供依据与思路。

🔔本文将为你拆解这一突破性研究的核心逻辑!

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01
文献解读
01
研究背景
肺 - 胃肠道共病结局差,核心调控机制未明确;肠肺轴介导共病,遗传因素贡献已知但综合结构不明;二者遗传相关性存在,但遗传重叠特征不明确;交叉性状分析未应用于肠肺轴,缺乏系统性研究框架。
02
研究目的
  1.  明确三人群肺 - 胃肠疾病遗传相关性及重叠特征

  2. 筛选共病多效性变异、基因及蛋白靶点,明确其功能特征

  3. 验证疾病因果关系,探索肠道微生物的介导作用

  4. 分析遗传变异与环境暴露的互作效应,挖掘预防靶点。

03
研究方法
  1. 数据收集与质控

    纳入欧(EUR:180 对)、东(EAS:84 对)、非(AFR:6 对)三人群肺 - 胃肠道疾病 GWAS 数据集,及 UKB 377886 名 EUR 个体数据;对 GWAS 数据进行 SNP 质控,最终保留平均 667 万个 SNP

  2. 遗传相关分析

    采用 LDSC 分析全局遗传相关性与遗传率,SUPERGNOVA 分析局部遗传相关性,分区 LDSC 解析功能层面遗传重叠

  3. 多效性靶点筛选

    通过 MTAG 做交叉性状荟萃分析,结合 FM-summary 精细定位、coloc 共定位筛选候选多效性变异,利用 HaploReg 等做功能注释;MAGMA 开展基因水平分析,筛选多效性基因

  4. 多组学验证

    采用 FUSION 软件整合 GTEx V8 做 TWAS 分析,结合 ARIC 研究血浆 pQTL 数据集做 PWAS 分析;通过 GSEA、TSEA、CSEA 完成基因功能富集

  5. 因果与互作分析

    通过双向两样本 MR 验证疾病因果关系,结合微生物组 GWAS 数据做介导分析;基于 UKB 数据开展 64 种可改变暴露的基因 - 环境(G×E)互作分析;

图1:研究设计概述

02
主要结果
Results Interpretation 
01

肺 - 胃肠道疾病遗传相关性

仅欧洲人群检出显著遗传关联,鉴定出27 对全局遗传相关的肺 - 胃肠道性状对,定位24 个共享局部遗传区域及 12 个功能重叠区域,区域主要富集于转录调控相关功能位点。
如图2所示

图2:27对肺-胃肠道特征对的遗传关联总结

02
多效性遗传靶点筛选
筛选得到42 个候选多效性遗传变异(含 3 个全新未报道位点),鉴定66 个多效性基因,核心富集于免疫 / 炎症反应通路,且在肺、胃肠组织及免疫细胞中特异性高表达。
如图3所示
图3:14对肺-胃肠道性状对的多效性基因功能注释
03
转录与蛋白层面验证
TWAS 分析显示58 个多效性基因表达与共病风险显著相关;PWAS 验证3 种血浆蛋白(MANBA、PPIC、APOE) 分别对应不同肺 - 胃肠道共病的发病风险。
如图4所示

图4: 基于66个候选多效基因的TWAS分析显著关联

04
基因 - 环境互作效应

BMI、吸烟、空气污染等为共病危险因素,研究发现4 处候选遗传变异与环境暴露的显著互作效应,可影响共病发生风险。

如图5所示

图5:UKB中64种可改变暴露因素与14种肺-胃肠道合并症之间的显著结果

05
因果关系与微生物介导通路
双向 MR 证实4 对疾病存在因果关联,其中哮喘与 GORD 呈双向因果;首次揭示两条肠道微生物介导通路,为肠肺轴调控提供关键证据。
如图6所示

图6:肺部和胃肠道疾病的因果推断

03
生信思路点拨
bioinformatics idea

本研究核心逻辑:

多人群 GWAS 挖掘→遗传相关性分析→多效性靶点筛选→多组学 / 因果 / 微生物 / G×E 验证,实现全链条机制解析
  1. 选题技巧:聚焦器官共病空白,结合遗传 + 微生物 + 环境热点,利用公共数据,兼顾创新与可行

  2. 统计关键:多方法筛选验证靶点,MR 敏感性分析排除偏倚,多组学交叉验证

  3. 工具应用:活用公共数据库,借助 LDSC、FUSION、MAGMA 等工具完成全流程分析。

04
文章小结
SUMMARY
本研究整合三人群 GWAS 数据集,通过多阶段分析,明确 EUR 人群 27 对肺 - 胃肠性状的遗传相关性,筛选出 42 个多效性变异、66 个多效性基因(富集于免疫 / 炎症通路);鉴定出 3 个全新遗传位点、58 个关联基因及 3 种关联血浆蛋白;验证 4 对疾病因果关联,发现两条肠道微生物介导通路及 4 个遗传变异与环境暴露的互作效应。研究首次系统解析肠肺轴遗传机制,为肺 - 胃肠道共病精准防控提供核心依据。

如果你也想借助GWAS、MR发高分SCI,欢迎后台咨询!助力你的科研产出!

-END-

生信老刘·专业生信分析

复刻高分思路

✅孟德尔随机化/机器学习

✅GBD/NHANES/GWAS

01

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02

IF43!海南医科大学借“GBD”拿下顶刊《BMJ》!颠覆 NTDs 评估认知!

03

IF33.9!恭喜药大"TCGA+机器学习"成果登一区TOP!思路简单易复刻!

04

IF29!北京大学登顶《Nature》子刊!空间多组学破解 MASLD 发病机制之谜

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  1. CONNECT:[ UseTime:0.001072s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001350s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000691s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000627s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001207s ]
  6. SELECT * FROM `set` [ RunTime:0.000572s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001350s ]
  8. SELECT * FROM `article` WHERE `id` = 484811 LIMIT 1 [ RunTime:0.001014s ]
  9. UPDATE `article` SET `lasttime` = 1775431021 WHERE `id` = 484811 [ RunTime:0.013940s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000624s ]
  11. SELECT * FROM `article` WHERE `id` < 484811 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001020s ]
  12. SELECT * FROM `article` WHERE `id` > 484811 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.003646s ]
  13. SELECT * FROM `article` WHERE `id` < 484811 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.002392s ]
  14. SELECT * FROM `article` WHERE `id` < 484811 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.002714s ]
  15. SELECT * FROM `article` WHERE `id` < 484811 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.009475s ]
0.191749s