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IF 11.2!恭喜南京医科大学联合“国自然”用GWAS+孟德尔随机化拿下双一区TOP!

  • 2026-04-29 19:18:28
IF 11.2!恭喜南京医科大学联合“国自然”用GWAS+孟德尔随机化拿下双一区TOP!
引言

🔔全球超 16.9 亿人受慢性肝病困扰,南京医科大学团队在《Genome Medicine》发布跨祖先研究成果!

💡研究涵盖四大族群超 45.6 万人,聚焦 7 类肝功能生物标志物,挖掘出 5507 个遗传信号(含 210 个新信号),定位 2012 个潜在致病变异。团队独创 mdS2G 基因关联框架,锁定 1166 个关键基因,发现 PEPD 蛋白可降低代谢相关脂肪肝、肝硬化风险,为肝病靶向治疗提供新靶点与研究思路。

研究亮点
01
跨族群大样本

覆盖东亚、欧洲、南亚、非洲四大族群超 45.6 万人,突破单一族群研究局限。

02
丰富遗传发现
定 5507 个肝功能生物标志物相关遗传信号,含 210 个新信号,精准定位 2012 个潜在因果变异。
03
创新基因关联框架

开发 mdS2G 多维框架,整合三类证据锁定 1166 个可信基因,肝细胞富集效果更优,开源供学界使用。

04
揭示多系统关联

证实肝 - 肠轴作用,发现 12 种肠道微生物对肝功能有因果效应;多效性变异与代谢、肿瘤等多系统表型相关。

05
锁定治疗靶点

发现 PEPD 蛋白可降低代谢相关脂肪肝、肝硬化风险,为肝病靶向治疗提供新候选分子。

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文献解读
研究背景

慢性肝病全球影响超 16.9 亿人,年死亡约 200 万,但其遗传机制仍未完全明确,且普遍存在诊断不足问题,制约了相关遗传研究。

以往肝功能相关全基因组关联研究(GWAS)多孤立分析生物标志物,且过度聚焦欧洲人群,缺乏跨祖先多样性,导致结果普适性受限

同时,不同人群连锁不平衡差异等因素易引发异质性偏差,而整合多生物标志物挖掘多效性变异的研究较少,亟需通过跨祖先、多维度分析填补上述研究空白

研究方法

数据来源

整合中国 HOPE 队列英国生物银行数据,覆盖东亚、欧洲等四大族群超 45.6 万人,纳入 7 类肝功能生物标志物检测数据。

技术平台

采用 Illumina 芯片测序,结合 SHAPEIT4、MINIMAC4 等工具进行基因分型与填充,依托 Tabula Sapiens 等数据库获取单细胞测序数据。

分析方法

以跨祖先 GWAS 荟萃分析为核心,辅以精细定位、PheWAS、孟德尔随机化等技术创新 mdS2G 基因关联框架,整合多维度证据实现遗传信号与基因的精准链接。

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研究结果
01
遗传信号挖掘
跨东亚、欧洲等四大族群超 45.6 万人的 GWAS meta 分析,鉴定出 5507 个肝功能生物标志物相关遗传信号(含 210 个新信号),ALT 与 AST、GGT 遗传相关性最强(r 分别为 0.677、0.605),478 个信号效应受饮酒行为影响

图一 七种肝功能相关定量生物标志物的跨祖先全基因组关联荟萃分析

02
因果变异定位
经精细定位筛选出 2012 个潜在因果变异,跨族群一致性(80.31% 无异质性)高于普通信号,且跨族群分析的定位分辨率显著优于单一族群。

图二 跨祖先连锁不平衡参考面板提升精细定位分辨率及跨祖先一致性

03

多系统关联解析

38 个多效性变异与代谢、肿瘤等多系统表型相关,如 CCND2 基因变异降低 2 型糖尿病风险,SLC30A10 变异增加肝胆癌风险;PRS-based PheWAS 揭示肝功能紊乱的泛系统影响。

图三 38 个多效性变异的表型全关联分析

04
基因关联与机制
创新 mdS2G 框架锁定 1166 个可信基因,肝细胞富集效果更优,证实肝 - 肠轴关键作用,鉴定 12 种对肝功能有因果效应的肠道微生物。

图四 利用 mdS2G 框架筛选出七种肝功能相关定量生物标志物的 1147 个可信基因

05
治疗靶点筛选
药物靶向 MR 分析发现 PEPD 蛋白可降低代谢相关脂肪肝、肝硬化风险,APOE 蛋白表现出 “双重效应”,为肝病靶向治疗提供新方向。
小结

这项跨四大族群的肝功能遗传研究成果丰硕!通过超 45.6 万人的 GWAS 荟萃分析,挖掘出 5507 个遗传信号(含 210 个新信号),精准定位 2012 个致病变异

创新 mdS2G 框架锁定 1166 个关键基因,证实肝 - 肠轴重要作用,更发现 PEPD 蛋白可降低代谢相关脂肪肝、肝硬化风险

研究打破单一族群局限,为肝病精准防治提供全新遗传靶点,开源工具也为后续研究奠定基础,助力肝脏健康进入精准医疗时代

想用GWAS+孟德尔随机化进行生信分析get同款思路?欢迎联系精品生信,定制专属你的高分论文!

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IF 15.7!华西医院GWAS+孟德尔随机化斩获《Nature》子刊,揭秘老年听损的遗传真相!

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IF 12.8!恭喜郑大团队用GWAS + 多组学解码 ESCC登顶顶刊!

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IF 10.6!深大团队联合“国自然”用CHARLS+机器学习拿下双一区,思路简单易复刻!

#IF 10.8!中山大dALPS 工具上线,GWAS + 机器学习斩获双一区TOP!
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  1. CONNECT:[ UseTime:0.000600s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000831s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000386s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000376s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000730s ]
  6. SELECT * FROM `set` [ RunTime:0.000271s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000689s ]
  8. SELECT * FROM `article` WHERE `id` = 492215 LIMIT 1 [ RunTime:0.000514s ]
  9. UPDATE `article` SET `lasttime` = 1777688879 WHERE `id` = 492215 [ RunTime:0.003750s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000351s ]
  11. SELECT * FROM `article` WHERE `id` < 492215 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.003991s ]
  12. SELECT * FROM `article` WHERE `id` > 492215 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000532s ]
  13. SELECT * FROM `article` WHERE `id` < 492215 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000915s ]
  14. SELECT * FROM `article` WHERE `id` < 492215 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000849s ]
  15. SELECT * FROM `article` WHERE `id` < 492215 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000844s ]
0.123809s