{"title":"痴呆和阿尔茨海默病的肠脑关系:对压力和免疫的影响。","authors":"Upasana Mukherjee , P. Hemachandra Reddy","doi":"10.1016/j.arr.2025.102843","DOIUrl":null,"url":null,"abstract":"<div><div>Alzheimer’s disease (AD) is increasingly recognized as a condition shaped not only by central nervous system pathology but also by complex, bidirectional interactions between the gut, brain, and immune system. This review synthesizes emerging evidence on gut-brain-immune dysregulation in AD, with particular attention to how chronic stress, microbial imbalance, and neuroimmune signaling converge to influence disease risk and progression. We move beyond traditional microbiome-focused perspectives to incorporate non-microbial gut-derived mediators, including enteroendocrine hormones, bile acids, and vagal neuropeptides, which contribute to immune modulation, neurotransmission, and brain homeostasis. Importantly, we highlight that AD-related neurodegeneration can also feedback to impair gastrointestinal function and microbial composition, creating a self-reinforcing pathological loop. The review integrates recent findings on the role of host genetic polymorphisms, such as APOE4 and TREM2, in modulating gut permeability, immune tone, and microbiota profiles—emphasizing a systems biology model in which genome-microbiome interactions shape AD susceptibility. We also explore how single-cell omics technologies and multi-organ frameworks are redefining our understanding of gut-brain-immune circuits at cellular resolution. The translational section critically evaluates current and potential therapeutic strategies, including dietary, microbial, behavioral, and endocrine interventions, while addressing the challenges of applying preclinical findings to diverse human populations across the disease spectrum. By incorporating age-, stage-, and genotype-specific considerations, this review offers a comprehensive and timely synthesis of the gut-brain-stress axis in AD, positioning it as a key frontier in mechanistic research and precision therapeutic development.</div></div>","PeriodicalId":55545,"journal":{"name":"Ageing Research Reviews","volume":"111 ","pages":"Article 102843"},"PeriodicalIF":12.4000,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Gut-brain relationship in dementia and Alzheimer's disease: Impact on stress and immunity\",\"authors\":\"Upasana Mukherjee , P. Hemachandra Reddy\",\"doi\":\"10.1016/j.arr.2025.102843\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Alzheimer’s disease (AD) is increasingly recognized as a condition shaped not only by central nervous system pathology but also by complex, bidirectional interactions between the gut, brain, and immune system. This review synthesizes emerging evidence on gut-brain-immune dysregulation in AD, with particular attention to how chronic stress, microbial imbalance, and neuroimmune signaling converge to influence disease risk and progression. We move beyond traditional microbiome-focused perspectives to incorporate non-microbial gut-derived mediators, including enteroendocrine hormones, bile acids, and vagal neuropeptides, which contribute to immune modulation, neurotransmission, and brain homeostasis. Importantly, we highlight that AD-related neurodegeneration can also feedback to impair gastrointestinal function and microbial composition, creating a self-reinforcing pathological loop. The review integrates recent findings on the role of host genetic polymorphisms, such as APOE4 and TREM2, in modulating gut permeability, immune tone, and microbiota profiles—emphasizing a systems biology model in which genome-microbiome interactions shape AD susceptibility. We also explore how single-cell omics technologies and multi-organ frameworks are redefining our understanding of gut-brain-immune circuits at cellular resolution. The translational section critically evaluates current and potential therapeutic strategies, including dietary, microbial, behavioral, and endocrine interventions, while addressing the challenges of applying preclinical findings to diverse human populations across the disease spectrum. By incorporating age-, stage-, and genotype-specific considerations, this review offers a comprehensive and timely synthesis of the gut-brain-stress axis in AD, positioning it as a key frontier in mechanistic research and precision therapeutic development.</div></div>\",\"PeriodicalId\":55545,\"journal\":{\"name\":\"Ageing Research Reviews\",\"volume\":\"111 \",\"pages\":\"Article 102843\"},\"PeriodicalIF\":12.4000,\"publicationDate\":\"2025-07-23\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Ageing Research Reviews\",\"FirstCategoryId\":\"3\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1568163725001898\",\"RegionNum\":1,\"RegionCategory\":\"医学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CELL BIOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Ageing Research Reviews","FirstCategoryId":"3","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1568163725001898","RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CELL BIOLOGY","Score":null,"Total":0}
Gut-brain relationship in dementia and Alzheimer's disease: Impact on stress and immunity
Alzheimer’s disease (AD) is increasingly recognized as a condition shaped not only by central nervous system pathology but also by complex, bidirectional interactions between the gut, brain, and immune system. This review synthesizes emerging evidence on gut-brain-immune dysregulation in AD, with particular attention to how chronic stress, microbial imbalance, and neuroimmune signaling converge to influence disease risk and progression. We move beyond traditional microbiome-focused perspectives to incorporate non-microbial gut-derived mediators, including enteroendocrine hormones, bile acids, and vagal neuropeptides, which contribute to immune modulation, neurotransmission, and brain homeostasis. Importantly, we highlight that AD-related neurodegeneration can also feedback to impair gastrointestinal function and microbial composition, creating a self-reinforcing pathological loop. The review integrates recent findings on the role of host genetic polymorphisms, such as APOE4 and TREM2, in modulating gut permeability, immune tone, and microbiota profiles—emphasizing a systems biology model in which genome-microbiome interactions shape AD susceptibility. We also explore how single-cell omics technologies and multi-organ frameworks are redefining our understanding of gut-brain-immune circuits at cellular resolution. The translational section critically evaluates current and potential therapeutic strategies, including dietary, microbial, behavioral, and endocrine interventions, while addressing the challenges of applying preclinical findings to diverse human populations across the disease spectrum. By incorporating age-, stage-, and genotype-specific considerations, this review offers a comprehensive and timely synthesis of the gut-brain-stress axis in AD, positioning it as a key frontier in mechanistic research and precision therapeutic development.
期刊介绍:
With the rise in average human life expectancy, the impact of ageing and age-related diseases on our society has become increasingly significant. Ageing research is now a focal point for numerous laboratories, encompassing leaders in genetics, molecular and cellular biology, biochemistry, and behavior. Ageing Research Reviews (ARR) serves as a cornerstone in this field, addressing emerging trends.
ARR aims to fill a substantial gap by providing critical reviews and viewpoints on evolving discoveries concerning the mechanisms of ageing and age-related diseases. The rapid progress in understanding the mechanisms controlling cellular proliferation, differentiation, and survival is unveiling new insights into the regulation of ageing. From telomerase to stem cells, and from energy to oxyradical metabolism, we are witnessing an exciting era in the multidisciplinary field of ageing research.
The journal explores the cellular and molecular foundations of interventions that extend lifespan, such as caloric restriction. It identifies the underpinnings of manipulations that extend lifespan, shedding light on novel approaches for preventing age-related diseases. ARR publishes articles on focused topics selected from the expansive field of ageing research, with a particular emphasis on the cellular and molecular mechanisms of the aging process. This includes age-related diseases like cancer, cardiovascular disease, diabetes, and neurodegenerative disorders. The journal also covers applications of basic ageing research to lifespan extension and disease prevention, offering a comprehensive platform for advancing our understanding of this critical field.