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糖尿病竟能预防阿尔茨海默?南京医科大学张福全团队最新MR研究揭示“药”比“病”更危险(IF=7.8)

  • 2026-02-17 11:54:10
糖尿病竟能预防阿尔茨海默?南京医科大学张福全团队最新MR研究揭示“药”比“病”更危险(IF=7.8)
如果你也在愁没数据、没样本、没实验条件,不妨换个思路,用公共基因组数据挖掘 + 多变量因果推断实现机制突破!你的课题是否适合孟德尔随机化分析?欢迎一起探讨!
中文标题:2型糖尿病与二甲双胍对阿尔茨海默病的相反因果效应
发表期刊:Journal of Preventive Alzheimer's Disease
发表时间:2025年6月
影响因子:7.8/Q3
研究背景
2型糖尿病(T2D)与阿尔茨海默病(AD)常为共病,两者在胰岛素抵抗、慢性炎症、代谢紊乱等方面有共同的病理特征。既往观察性研究和动物实验提示T2D可能增加AD风险,而T2D治疗药物如二甲双胍(metformin)被认为可能具有神经保护作用,但也有研究指出其可能促进Aβ生成。然而,传统观察性研究存在样本偏差、反向因果等问题,动物模型也难以完全模拟人类病理。因此,本研究旨在利用遗传工具变量方法(孟德尔随机化,MR) 探讨T2D与二甲双胍对AD的独立因果效应,以澄清两者在AD发生发展中的角色。
研究方法
1. 数据来源:   · 使用公开的GWAS汇总数据,包括:     · T2D(21,969例;433,048对照)     · 二甲双胍使用(11,358例;444,918对照)     · AD(16,902例;436,831对照)   · 所有数据均来自欧洲人群(UK Biobank、FinnGen项目)。2. 分析方法:   · 两样本孟德尔随机化(MR):使用IVW为主要方法,MR-Egger和加权中位数作为补充,评估T2D和二甲双胍对AD的“总体因果效应”。   · 多变量MR(MVMR):同时纳入T2D和二甲双胍的遗传工具,评估各自对AD的独立因果效应。   · 敏感性分析:包括异质性检验(Cochran’s Q)、多效性检验(MR-Egger截距)、异常SNP检测(MR-PRESSO)。   · 真实世界药物不良事件分析:使用FDA不良事件报告系统(FAERS,2004Q1–2024Q2),分析二甲双胍与AD之间的信号关联。
研究结果
1. MR分析(总体效应):   · T2D与AD风险无显著关联(OR=1.03,P=0.128)。
  · 二甲双胍使用与AD风险呈边缘显著正相关(OR=1.05,P=0.053),但未达到统计学显著性。2. MVMR分析(独立效应):   · T2D对AD具有保护作用(OR=0.82,P=0.031)。   · 二甲双胍使用与AD风险显著正相关(OR=1.26,P=9.45×10⁻³)。3. FAERS数据库分析:   · 在228,283份二甲双胍相关不良事件报告中,仅29例AD报告,信号不显著(ROR=0.83,P=0.3126)。4. 敏感性分析:   · 未发现明显的方向性多效性,但存在一定异质性。
研究结论
1. T2D本身可能对AD具有保护作用,而非传统认为的风险因素。2. 二甲双胍作为T2D的一线治疗药物,可能独立增加AD风险,尤其在多变量调整后显著。3. 临床实践中,对T2D患者处方二甲双胍时应评估其潜在的AD风险,尤其是长期使用患者。4. 未来需进一步开展机制研究和高质量临床试验,明确二甲双胍对AD的具体影响路径及其在AD预防中的合理使用策略。
课程推荐
年底了!大家的科研进展到哪了?如果你正在发愁传统的观察性研究没新意,不妨试试换成孟德尔随机化与多变量因果推断,也许是柳暗花明又一村哦~首先大家要搞清楚,这两个不仅仅是方法的升级,而是有本质的区别,也就是相关分析 ≠ 因果推断:· 传统观察性研究:容易受混杂因素干扰,无法确定因果关系· 孟德尔随机化(MR):利用遗传变异作为工具变量,模拟随机分组,直接推断暴露与结局的因果效应· 多变量孟德尔随机化(MVMR):进一步剥离多个相关暴露的独立效应,避免相互干扰可见,这不是“换方法不换思路”,而是从相关性描述转向因果机制解析,恰好契合当前大家对疾病共病机制、药物副作用评估和精准预防等方向的研究热点。而孟德尔随机化的核心优势就是直接回答“某个风险因素是否真正导致疾病”这一根本问题,比传统观察性研究(只能提示“两者有关联”)的研究价值更高、证据强度更大(因为当前许多疾病与药物之间的因果关系仍不明确,这正是大家突破的切入点!)。天我们也看到一篇很典型的研究,利用两样本MR + MVMR,结合大规模GWAS数据和FAERS真实世界证据,发表在权威期刊,揭示了:2型糖尿病本身对阿尔茨海默病具有保护作用,而其常用药二甲双胍却独立增加AD风险这一发现不仅挑战了传统认知,也为糖尿病患者的个体化用药提供了全新的因果证据。如果想复现这种因果推断+多变量调整的新思路,要不要帮你锁定一个具体的疾病-药物-副作用三联研究方向?然后梳理MR分析流程、工具变量筛选策略、敏感性检验框架?需要的朋友欢迎随时交流你卡壳的问题哦,帮你点对点快速推进~
往期精选
10分+零实验心血管顶刊!西交大靠“MR+多组学”三步法,锁定72个心血管病新靶点
IF=9.6 | 首都医科大学杨菲团队发现脑出血后神经保护新轴:乳酸-H3K14la-PMCA2调控钙稳态抑制铁死亡
9.7分新策略!东北农大巧用网络毒理学锁定铁死亡靶点,这个机制关联思路正中国自然下怀

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  1. CONNECT:[ UseTime:0.000963s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001555s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000668s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000278s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000586s ]
  6. SELECT * FROM `set` [ RunTime:0.000190s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000573s ]
  8. SELECT * FROM `article` WHERE `id` = 464234 LIMIT 1 [ RunTime:0.000515s ]
  9. UPDATE `article` SET `lasttime` = 1772253512 WHERE `id` = 464234 [ RunTime:0.009878s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000251s ]
  11. SELECT * FROM `article` WHERE `id` < 464234 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000465s ]
  12. SELECT * FROM `article` WHERE `id` > 464234 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000431s ]
  13. SELECT * FROM `article` WHERE `id` < 464234 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000652s ]
  14. SELECT * FROM `article` WHERE `id` < 464234 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.003989s ]
  15. SELECT * FROM `article` WHERE `id` < 464234 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000740s ]
0.190066s