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Zhang L, Wei J, Liu X, Li D, Pang X, Chen F, Cao H, Lei P. Gut microbiota-astrocyte axis: new insights into age-related cognitive decline. Neural Regen Res 2025; 20:990-1008. [PMID: 38989933 PMCID: PMC11438350 DOI: 10.4103/nrr.nrr-d-23-01776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Accepted: 03/04/2024] [Indexed: 07/12/2024] Open
Abstract
With the rapidly aging human population, age-related cognitive decline and dementia are becoming increasingly prevalent worldwide. Aging is considered the main risk factor for cognitive decline and acts through alterations in the composition of the gut microbiota, microbial metabolites, and the functions of astrocytes. The microbiota-gut-brain axis has been the focus of multiple studies and is closely associated with cognitive function. This article provides a comprehensive review of the specific changes that occur in the composition of the gut microbiota and microbial metabolites in older individuals and discusses how the aging of astrocytes and reactive astrocytosis are closely related to age-related cognitive decline and neurodegenerative diseases. This article also summarizes the gut microbiota components that affect astrocyte function, mainly through the vagus nerve, immune responses, circadian rhythms, and microbial metabolites. Finally, this article summarizes the mechanism by which the gut microbiota-astrocyte axis plays a role in Alzheimer's and Parkinson's diseases. Our findings have revealed the critical role of the microbiota-astrocyte axis in age-related cognitive decline, aiding in a deeper understanding of potential gut microbiome-based adjuvant therapy strategies for this condition.
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Affiliation(s)
- Lan Zhang
- Haihe Laboratory of Cell Ecosystem, Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China
- Tianjin Geriatrics Institute, Tianjin Medical University General Hospital, Tianjin, China
| | - Jingge Wei
- Department of Gastroenterology and Hepatology, Tianjin Medical University General Hospital, National Key Clinical Specialty, Tianjin Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, Tianjin, China
| | - Xilei Liu
- Department of Urology, Tianjin Medical University General Hospital, Tianjin, China
| | - Dai Li
- Haihe Laboratory of Cell Ecosystem, Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China
- Tianjin Geriatrics Institute, Tianjin Medical University General Hospital, Tianjin, China
| | - Xiaoqi Pang
- Department of Gastroenterology and Hepatology, Tianjin Medical University General Hospital, National Key Clinical Specialty, Tianjin Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, Tianjin, China
| | - Fanglian Chen
- Tianjin Neurological Institution, Tianjin Medical University General Hospital, Tianjin, China
| | - Hailong Cao
- Department of Gastroenterology and Hepatology, Tianjin Medical University General Hospital, National Key Clinical Specialty, Tianjin Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, Tianjin, China
| | - Ping Lei
- Haihe Laboratory of Cell Ecosystem, Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China
- Tianjin Geriatrics Institute, Tianjin Medical University General Hospital, Tianjin, China
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2
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Wang T, Zhou D, Hong Z. Adipose tissue in older individuals: a contributing factor to sarcopenia. Metabolism 2024; 160:155998. [PMID: 39128607 DOI: 10.1016/j.metabol.2024.155998] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/05/2024] [Revised: 08/05/2024] [Accepted: 08/06/2024] [Indexed: 08/13/2024]
Abstract
Sarcopenia is a geriatric syndrome characterized by a functional decline in muscle. The prevalence of sarcopenia increases with natural aging, becoming a serious health problem among elderly individuals. Therefore, understanding the pathology of sarcopenia is critical for inhibiting age-related alterations and promoting health and longevity in elderly individuals. The development of sarcopenia may be influenced by interactions between visceral and subcutaneous adipose tissue and skeletal muscle, particularly under conditions of chronic low-grade inflammation and metabolic dysfunction. This hypothesis is supported by the following observations: (i) accumulation of senescent cells in both adipose tissue and skeletal muscle with age; (ii) gut dysbiosis, characterized by an imbalance in gut microbial communities as the main trigger for inflammation, sarcopenia, and aged adipose tissue; and (iii) microbial dysbiosis, which could impact the onset or progression of a senescent state. Moreover, adipose tissue acts as an endocrine organ, releasing molecules that participate in intricate communication networks between organs. Our discussion focuses on novel adipokines and their role in regulating adipose tissue and muscle, particularly those influenced by aging and obesity, emphasizing their contributions to disease development. On the basis of these findings, we propose that age-related adipose tissue and sarcopenia are disorders characterized by chronic inflammation and metabolic dysregulation. Finally, we explore new potential therapeutic strategies involving specialized proresolving mediator (SPM) G protein-coupled receptor (GPCR) agonists, non-SPM GPCR agonists, transient receptor potential (TRP) channels, antidiabetic drugs in conjunction with probiotics and prebiotics, and compounds designed to target senescent cells and mitigate their pro-inflammatory activity.
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Affiliation(s)
- Tiantian Wang
- Department of Neurology, National Clinical Research Center for Geriatrics, West China Hospital of Sichuan University, Chengdu, Sichuan, China; Institute of Brain Science and Brain-inspired Technology of West China Hospital, Sichuan University, Chengdu, Sichuan, China; Department of Neurology, Chengdu Shangjin Nanfu Hospital, Chengdu, Sichuan, China.
| | - Dong Zhou
- Department of Neurology, National Clinical Research Center for Geriatrics, West China Hospital of Sichuan University, Chengdu, Sichuan, China; Institute of Brain Science and Brain-inspired Technology of West China Hospital, Sichuan University, Chengdu, Sichuan, China; Department of Neurology, Chengdu Shangjin Nanfu Hospital, Chengdu, Sichuan, China
| | - Zhen Hong
- Department of Neurology, National Clinical Research Center for Geriatrics, West China Hospital of Sichuan University, Chengdu, Sichuan, China; Institute of Brain Science and Brain-inspired Technology of West China Hospital, Sichuan University, Chengdu, Sichuan, China; Department of Neurology, Chengdu Shangjin Nanfu Hospital, Chengdu, Sichuan, China.
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3
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Liu H, Magaye R, Kaye DM, Wang BH. Heart failure with preserved ejection fraction: The role of inflammation. Eur J Pharmacol 2024; 980:176858. [PMID: 39074526 DOI: 10.1016/j.ejphar.2024.176858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2024] [Revised: 07/15/2024] [Accepted: 07/24/2024] [Indexed: 07/31/2024]
Abstract
Heart failure (HF) is a debilitating clinical syndrome affecting 64.3 million patients worldwide. More than 50% of HF cases are attributed to HF with preserved ejection fraction (HFpEF), an entity growing in prevalence and mortality. Although recent breakthroughs reveal the prognostic benefits of sodium-glucose co-transporter 2 inhibitors (SGLT2i) in HFpEF, there is still a lack of effective pharmacological therapy available. This highlights a major gap in medical knowledge that must be addressed. Current evidence attributes HFpEF pathogenesis to an interplay between cardiometabolic comorbidities, inflammation, and renin-angiotensin-aldosterone-system (RAAS) activation, leading to cardiac remodelling and diastolic dysfunction. However, conventional RAAS blockade has demonstrated limited benefits in HFpEF, which emphasises that alternative therapeutic targets should be explored. Presently, there is limited literature examining the use of anti-inflammatory HFpEF therapies despite growing evidence supporting its importance in disease progression. Hence, this review aims to explore current perspectives on HFpEF pathogenesis, including the importance of inflammation-driven cardiac remodelling and the therapeutic potential of anti-inflammatory therapies.
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Affiliation(s)
- Hongyi Liu
- Monash Alfred Baker Centre for Cardiovascular Research, School of Translational Medicine, Faculty of Medicine, Nursing and Health Sciences, Monash University, Melbourne, VIC, 3004, Australia; Heart Failure Research Group, Baker Heart and Diabetes Institute, Melbourne, Australia; Biomarker Discovery Laboratory, Baker Heart and Diabetes Institute, Melbourne, Australia.
| | - Ruth Magaye
- Monash Alfred Baker Centre for Cardiovascular Research, School of Translational Medicine, Faculty of Medicine, Nursing and Health Sciences, Monash University, Melbourne, VIC, 3004, Australia; Heart Failure Research Group, Baker Heart and Diabetes Institute, Melbourne, Australia.
| | - David M Kaye
- Monash Alfred Baker Centre for Cardiovascular Research, School of Translational Medicine, Faculty of Medicine, Nursing and Health Sciences, Monash University, Melbourne, VIC, 3004, Australia; Heart Failure Research Group, Baker Heart and Diabetes Institute, Melbourne, Australia.
| | - Bing H Wang
- Monash Alfred Baker Centre for Cardiovascular Research, School of Translational Medicine, Faculty of Medicine, Nursing and Health Sciences, Monash University, Melbourne, VIC, 3004, Australia; Heart Failure Research Group, Baker Heart and Diabetes Institute, Melbourne, Australia; Biomarker Discovery Laboratory, Baker Heart and Diabetes Institute, Melbourne, Australia.
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4
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Gaber M, Wilson AS, Millen AE, Hovey KM, LaMonte MJ, Wactawski-Wende J, Ochs-Balcom HM, Cook KL. Visceral adiposity in postmenopausal women is associated with a pro-inflammatory gut microbiome and immunogenic metabolic endotoxemia. MICROBIOME 2024; 12:192. [PMID: 39367431 DOI: 10.1186/s40168-024-01901-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Accepted: 08/06/2024] [Indexed: 10/06/2024]
Abstract
BACKGROUND Obesity, and in particular abdominal obesity, is associated with an increased risk of developing a variety of chronic diseases. Obesity, aging, and menopause are each associated with differential shifts in the gut microbiome. Obesity causes chronic low-grade inflammation due to increased lipopolysaccharide (LPS) levels which is termed "metabolic endotoxemia." We examined the association of visceral adiposity tissue (VAT) area, circulating endotoxemia markers, and the gut bacterial microbiome in a cohort of aged postmenopausal women. METHODS Fifty postmenopausal women (mean age 78.8 ± 5.3 years) who had existing adipose measurements via dual x-ray absorptiometry (DXA) were selected from the extremes of VAT: n = 25 with low VAT area (45.6 ± 12.5 cm2) and n = 25 with high VAT area (177.5 ± 31.3 cm2). Dietary intake used to estimate the Healthy Eating Index (HEI) score was assessed with a food frequency questionnaire. Plasma LPS, LPS-binding protein (LBP), anti-LPS antibodies, anti-flagellin antibodies, and anti-lipoteichoic acid (LTA) antibodies were measured by ELISA. Metagenomic sequencing was performed on fecal DNA. Female C57BL/6 mice consuming a high-fat or low-fat diet were treated with 0.4 mg/kg diet-derived fecal isolated LPS modeling metabolic endotoxemia, and metabolic outcomes were measured after 6 weeks. RESULTS Women in the high VAT group showed increased Proteobacteria abundance and a lower Firmicutes/Bacteroidetes ratio. Plasma LBP concentration was positively associated with VAT area. Plasma anti-LPS, anti-LTA, and anti-flagellin IgA antibodies were significantly correlated with adiposity measurements. Women with high VAT showed significantly elevated LPS-expressing bacteria compared to low VAT women. Gut bacterial species that showed significant associations with both adiposity and inflammation (anti-LPS IgA and LBP) were Proteobacteria (Escherichia coli, Shigella spp., and Klebsiella spp.) and Veillonella atypica. Healthy eating index (HEI) scores negatively correlated with % body fat and anti-LPS IgA antibodies levels. Preclinical murine model showed that high-fat diet-fed mice administered a low-fat diet fecal-derived LPS displayed reduced body weight, decreased % body fat, and improved glucose tolerance test parameters when compared with saline-injected or high-fat diet fecal-derived LPS-treated groups consuming a high-fat diet. CONCLUSIONS Increased VAT in postmenopausal women is associated with elevated gut Proteobacteria abundance and immunogenic metabolic endotoxemia markers. Low-fat diet-derived fecal-isolated LPS improved metabolic parameters in high-fat diet-fed mice giving mechanistic insights into potential pro-health signaling mediated by under-acylated LPS isoforms. Video Abstract.
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Grants
- W81XWH-20-1-0014 Congressionally Directed Medical Research Programs
- W81XWH-20-1-0014 Congressionally Directed Medical Research Programs
- W81XWH-20-1-0014 Congressionally Directed Medical Research Programs
- R01 DE013505, R01 DE024523 NIDCR NIH HHS
- R01 DE013505, R01 DE024523 NIDCR NIH HHS
- R01 DE013505, R01 DE024523 NIDCR NIH HHS
- R01 DE013505, R01 DE024523 NIDCR NIH HHS
- R01 DE013505, R01 DE024523 NIDCR NIH HHS
- HHSN268201600018C, HHSN268201600001C, HHSN268201600002C, HHSN268201600003C, and HHSN268201600004C NHLBI NIH HHS
- HHSN268201600018C, HHSN268201600001C, HHSN268201600002C, HHSN268201600003C, and HHSN268201600004C NHLBI NIH HHS
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Affiliation(s)
- Mohamed Gaber
- Department of Surgery, Wake Forest University School of Medicine, Winston-Salem, NC, 27157, USA
- Department of Cancer Biology, Wake Forest University School of Medicine, Winston-Salem, NC, 27157, USA
| | - Adam S Wilson
- Department of Surgery, Wake Forest University School of Medicine, Winston-Salem, NC, 27157, USA
| | - Amy E Millen
- Department of Epidemiology and Environmental Health, School of Public Health and Health Professions, University at Buffalo, The State University of New York, Buffalo, NY, 14214, USA
| | - Kathleen M Hovey
- Department of Epidemiology and Environmental Health, School of Public Health and Health Professions, University at Buffalo, The State University of New York, Buffalo, NY, 14214, USA
| | - Michael J LaMonte
- Department of Epidemiology and Environmental Health, School of Public Health and Health Professions, University at Buffalo, The State University of New York, Buffalo, NY, 14214, USA
| | - Jean Wactawski-Wende
- Department of Epidemiology and Environmental Health, School of Public Health and Health Professions, University at Buffalo, The State University of New York, Buffalo, NY, 14214, USA
| | - Heather M Ochs-Balcom
- Department of Epidemiology and Environmental Health, School of Public Health and Health Professions, University at Buffalo, The State University of New York, Buffalo, NY, 14214, USA.
| | - Katherine L Cook
- Department of Surgery, Wake Forest University School of Medicine, Winston-Salem, NC, 27157, USA.
- Department of Cancer Biology, Wake Forest University School of Medicine, Winston-Salem, NC, 27157, USA.
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Neufeld PM, Nettersheim RA, Matschke V, Vorgerd M, Stahlke S, Theiss C. Unraveling the gut-brain axis: the impact of steroid hormones and nutrition on Parkinson's disease. Neural Regen Res 2024; 19:2219-2228. [PMID: 38488556 PMCID: PMC11034592 DOI: 10.4103/1673-5374.391304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 10/07/2023] [Accepted: 11/24/2023] [Indexed: 04/24/2024] Open
Abstract
This comprehensive review explores the intricate relationship between nutrition, the gut microbiome, steroid hormones, and Parkinson's disease within the context of the gut-brain axis. The gut-brain axis plays a pivotal role in neurodegenerative diseases like Parkinson's disease, encompassing diverse components such as the gut microbiota, immune system, metabolism, and neural pathways. The gut microbiome, profoundly influenced by dietary factors, emerges as a key player. Nutrition during the first 1000 days of life shapes the gut microbiota composition, influencing immune responses and impacting both child development and adult health. High-fat, high-sugar diets can disrupt this delicate balance, contributing to inflammation and immune dysfunction. Exploring nutritional strategies, the Mediterranean diet's anti-inflammatory and antioxidant properties show promise in reducing Parkinson's disease risk. Microbiome-targeted dietary approaches and the ketogenic diet hold the potential in improving brain disorders. Beyond nutrition, emerging research uncovers potential interactions between steroid hormones, nutrition, and Parkinson's disease. Progesterone, with its anti-inflammatory properties and presence in the nervous system, offers a novel option for Parkinson's disease therapy. Its ability to enhance neuroprotection within the enteric nervous system presents exciting prospects. The review addresses the hypothesis that α-synuclein aggregates originate from the gut and may enter the brain via the vagus nerve. Gastrointestinal symptoms preceding motor symptoms support this hypothesis. Dysfunctional gut-brain signaling during gut dysbiosis contributes to inflammation and neurotransmitter imbalances, emphasizing the potential of microbiota-based interventions. In summary, this review uncovers the complex web of interactions between nutrition, the gut microbiome, steroid hormones, and Parkinson's disease within the gut-brain axis framework. Understanding these connections not only offers novel therapeutic insights but also illuminates the origins of neurodegenerative diseases such as Parkinson's disease.
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Affiliation(s)
- Paula Maria Neufeld
- Department of Cytology, Institute of Anatomy, Medical Faculty, Ruhr-University Bochum, Bochum, Germany
| | - Ralf A. Nettersheim
- Department of Visceral Surgery, University Hospital Bergmannsheil, Ruhr-University Bochum, Bochum, Germany
| | - Veronika Matschke
- Department of Cytology, Institute of Anatomy, Medical Faculty, Ruhr-University Bochum, Bochum, Germany
| | - Matthias Vorgerd
- Department of Neurology, Heimer Institute for Muscle Research, University Hospital Bergmannsheil, Ruhr-University Bochum, Bochum, Germany
| | - Sarah Stahlke
- Department of Cytology, Institute of Anatomy, Medical Faculty, Ruhr-University Bochum, Bochum, Germany
| | - Carsten Theiss
- Department of Cytology, Institute of Anatomy, Medical Faculty, Ruhr-University Bochum, Bochum, Germany
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6
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Li Y, Zhang B, Jiang L, Cheng T, Cheng H, Qian P. Gut microbiota plays pivotal roles in benign and malignant hematopoiesis. BLOOD SCIENCE 2024; 6:e00200. [PMID: 39027904 PMCID: PMC11257671 DOI: 10.1097/bs9.0000000000000200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Accepted: 01/18/2024] [Indexed: 07/20/2024] Open
Abstract
Accumulated evidence emerges that dynamic changes in human gut microbiota and microbial metabolites can alter the ecological balance of symbiotic hosts. The gut microbiota plays a role in various diseases through different mechanisms. More and more attention has been paid to the effects that human microbiota extends beyond the gut. This review summarized the current understanding of the roles that gut microbiota plays in hematopoietic regulation and the occurrence and development of benign and malignant hematologic diseases. The progress of the application of microbiota in treatment was discussed in order to provide new insights into clinical diagnosis and treatment in the future.
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Affiliation(s)
- Yuxuan Li
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300020, China
- Tianjin Institutes of Health Science, Center for Stem Cell Medicine, Chinese Academy of Medical Sciences; Department of Stem Cell & Regenerative Medicine, Peking Union Medical College, Tianjin 300020, China
| | - Biao Zhang
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300020, China
- Tianjin Institutes of Health Science, Center for Stem Cell Medicine, Chinese Academy of Medical Sciences; Department of Stem Cell & Regenerative Medicine, Peking Union Medical College, Tianjin 300020, China
| | - Lingli Jiang
- Center for Stem Cell and Regenerative Medicine and Bone Marrow Transplantation Center of the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China
- Liangzhu Laboratory, Zhejiang University, 1369 West Wenyi Road, Hangzhou 311121, China
- Institute of Hematology, Zhejiang University & Zhejiang Engineering Laboratory for Stem Cell and Immunotherapy, Hangzhou 310058, China
| | - Tao Cheng
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300020, China
- Tianjin Institutes of Health Science, Center for Stem Cell Medicine, Chinese Academy of Medical Sciences; Department of Stem Cell & Regenerative Medicine, Peking Union Medical College, Tianjin 300020, China
| | - Hui Cheng
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300020, China
- Tianjin Institutes of Health Science, Center for Stem Cell Medicine, Chinese Academy of Medical Sciences; Department of Stem Cell & Regenerative Medicine, Peking Union Medical College, Tianjin 300020, China
| | - Pengxu Qian
- Center for Stem Cell and Regenerative Medicine and Bone Marrow Transplantation Center of the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China
- Liangzhu Laboratory, Zhejiang University, 1369 West Wenyi Road, Hangzhou 311121, China
- Institute of Hematology, Zhejiang University & Zhejiang Engineering Laboratory for Stem Cell and Immunotherapy, Hangzhou 310058, China
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Quin C, Breznik JA, Kennedy AE, DeJong EN, Andary CM, Ermolina S, Davidson DJ, Ma J, Surette MG, Bowdish DME. Monocyte-driven inflamm-aging reduces intestinal barrier function in females. Immun Ageing 2024; 21:65. [PMID: 39350153 PMCID: PMC11440997 DOI: 10.1186/s12979-024-00469-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2024] [Accepted: 09/21/2024] [Indexed: 10/04/2024]
Abstract
BACKGROUND The intestinal barrier encompasses physical and immunological components that act to compartmentalize luminal contents, such as bacteria and endotoxins, from the host. It has been proposed that an age-related decline of intestinal barrier function may allow for the passage of luminal contents into the bloodstream, triggering a low-grade systemic inflammation termed inflamm-aging. Although there is mounting evidence to support this hypothesis in model species, it is unclear if this phenomenon occurs in humans. In addition, despite being well-established that biological sex impacts aging physiology, its influence on intestinal barrier function and inflamm-aging has not been explored. RESULTS In this study, we observed sex differences in markers of intestinal barrier integrity, where females had increased epithelial permeability throughout life as compared to males. With age, females had an age-associated increase in circulating bacterial products and metabolites such as LPS and kynurenine, suggesting reduced barrier function. Females also had age-associated increases in established markers of inflamm-aging, including peripheral blood monocytes as well as TNF and CRP. To determine if impaired barrier function was driving inflamm-aging, we performed a mediation analysis. The results show that the loss of intestinal barrier integrity was not the mediator of inflamm-aging in humans. Instead, persistent, low-grade inflammation with age preceded the increase in circulating bacterial products, which we confirmed using animal models. We found, as in humans, that sex modified age-associated increases in circulating monocytes in mice, and that inflammation mediates the loss of intestinal barrier function. CONCLUSION Taken together, our results suggest that higher basal intestinal permeability in combination with age-associated inflammation, increases circulating LPS in females. Thus, targeting barrier permeability in females may slow the progression of inflamm-aging, but is unlikely to prevent it.
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Affiliation(s)
- Candice Quin
- Institute of Medical Sciences, School of Medicine, Medical Sciences and Nutrition, University of Aberdeen, Aberdeen, Scotland.
| | - Jessica A Breznik
- Department of Medicine, Faculty of Health Sciences, McMaster University, Hamilton, ON, Canada
- McMaster Institute for Research on Aging, Hamilton, ON, Canada
- McMaster Immunology Research Centre, Hamilton, ON, Canada
| | - Allison E Kennedy
- Department of Medicine, Faculty of Health Sciences, McMaster University, Hamilton, ON, Canada
- McMaster Institute for Research on Aging, Hamilton, ON, Canada
- McMaster Immunology Research Centre, Hamilton, ON, Canada
| | - Erica N DeJong
- Department of Medicine, Faculty of Health Sciences, McMaster University, Hamilton, ON, Canada
- McMaster Institute for Research on Aging, Hamilton, ON, Canada
- McMaster Immunology Research Centre, Hamilton, ON, Canada
| | - Catherine M Andary
- Department of Medicine, Faculty of Health Sciences, McMaster University, Hamilton, ON, Canada
- McMaster Institute for Research on Aging, Hamilton, ON, Canada
- McMaster Immunology Research Centre, Hamilton, ON, Canada
| | - Sofya Ermolina
- Department of Medicine, Faculty of Health Sciences, McMaster University, Hamilton, ON, Canada
- McMaster Institute for Research on Aging, Hamilton, ON, Canada
- McMaster Immunology Research Centre, Hamilton, ON, Canada
| | - Donald J Davidson
- Institute for Regeneration and Repair, Centre for Inflammatory Research, University of Edinburgh, Edinburgh, Scotland
| | - Jinhui Ma
- Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, ON, Canada
| | - Michael G Surette
- Department of Medicine, Faculty of Health Sciences, McMaster University, Hamilton, ON, Canada
| | - Dawn M E Bowdish
- Department of Medicine, Faculty of Health Sciences, McMaster University, Hamilton, ON, Canada.
- McMaster Institute for Research on Aging, Hamilton, ON, Canada.
- McMaster Immunology Research Centre, Hamilton, ON, Canada.
- Firestone Institute for Respiratory Health, St. Joseph's Healthcare Hamilton, Hamilton, ON, Canada.
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8
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Li A, Kou R, Wang R, Wang J, Zhang B, Liu J, Hu Y, Wang S. 2'-Fucosyllactose attenuates aging-related metabolic disorders through modulating gut microbiome-T cell axis. Aging Cell 2024:e14343. [PMID: 39301860 DOI: 10.1111/acel.14343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Revised: 08/09/2024] [Accepted: 09/05/2024] [Indexed: 09/22/2024] Open
Abstract
Aging-related metabolic disorders seriously affect the lifespan of middle-aged and older people, potentially due to disruptions in the adaptive immune and gut microbial profiles. Dietary intervention offers a promising strategy for maintaining metabolic health. This study aimed to investigate the ameliorative effect of 2'-fucosyllactose (2'-FL) on aging-induced metabolic dysfunction and the underlying mechanisms. The results revealed that 2'-FL significantly relieved aging-related metabolic disorders, including weight gain, lipid deposition, dyslipidemia, glucose intolerance, systemic inflammation, and abnormal hepatic metabolism. Flow cytometry analysis revealed a significant reduction in T cytotoxic (Tc), T helper (Th), and regulatory T (Treg) cells and a significant increase in Th17 cells in aged mice, while 2'-FL relieved the aging-induced proportional changes in Th and Th17 subtypes. The aging intestinal microecology was characterized by higher Th17/Treg ratios, impaired gut barrier function, lower gut bacterial diversity, decreased abundance of beneficial genera including Ligilactobacillus, Colidextribacter, Mucispirillum, and Lachnoclostridium, and increased abundance of harmful bacteria including Turicibacter and Desulfovibrio, which was ameliorated by 2'-FL treatment. These findings highlight that 2'-FL is an ideal dietary prebiotic for improving aging-related metabolic disorders by modulating both the adaptive immune system and the gut microbial profile.
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Affiliation(s)
- Ang Li
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, Tianjin, China
| | - Ruixin Kou
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, Tianjin, China
| | - Ruishan Wang
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, Tianjin, China
| | - Jin Wang
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, Tianjin, China
| | - Bowei Zhang
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, Tianjin, China
| | - Jingmin Liu
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, Tianjin, China
| | - Yaozhong Hu
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, Tianjin, China
| | - Shuo Wang
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, Tianjin, China
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9
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Khuu MP, Paeslack N, Dremova O, Benakis C, Kiouptsi K, Reinhardt C. The gut microbiota in thrombosis. Nat Rev Cardiol 2024:10.1038/s41569-024-01070-6. [PMID: 39289543 DOI: 10.1038/s41569-024-01070-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 08/01/2024] [Indexed: 09/19/2024]
Abstract
The gut microbiota has emerged as an environmental risk factor that affects thrombotic phenotypes in several cardiovascular diseases. Evidence includes the identification of marker species by sequencing studies of the gut microbiomes of patients with thrombotic disease, the influence of antithrombotic therapies on gut microbial diversity, and preclinical studies in mouse models of thrombosis that have demonstrated the functional effects of the gut microbiota on vascular inflammatory phenotypes and thrombus formation. In addition to impaired gut barrier function promoting low-grade inflammation, gut microbiota-derived metabolites have been shown to act on vascular cell types and promote thrombus formation. Therefore, these meta-organismal pathways that link the metabolic capacities of gut microorganisms with host immune functions have emerged as potential diagnostic markers and novel drug targets. In this Review, we discuss the link between the gut microbiota, its metabolites and thromboembolic diseases.
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Affiliation(s)
- My Phung Khuu
- Center for Thrombosis and Hemostasis (CTH), University Medical Center Mainz, Johannes Gutenberg-University Mainz, Mainz, Germany
| | - Nadja Paeslack
- Center for Thrombosis and Hemostasis (CTH), University Medical Center Mainz, Johannes Gutenberg-University Mainz, Mainz, Germany
| | - Olga Dremova
- Center for Thrombosis and Hemostasis (CTH), University Medical Center Mainz, Johannes Gutenberg-University Mainz, Mainz, Germany
| | - Corinne Benakis
- Institute for Stroke and Dementia Research (ISD), University Hospital, LMU Munich, Munich, Germany
| | - Klytaimnistra Kiouptsi
- Center for Thrombosis and Hemostasis (CTH), University Medical Center Mainz, Johannes Gutenberg-University Mainz, Mainz, Germany
- German Center for Cardiovascular Research (DZHK), Partner Site Rhine-Main, Mainz, Germany
| | - Christoph Reinhardt
- Center for Thrombosis and Hemostasis (CTH), University Medical Center Mainz, Johannes Gutenberg-University Mainz, Mainz, Germany.
- German Center for Cardiovascular Research (DZHK), Partner Site Rhine-Main, Mainz, Germany.
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10
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Ren T, Feng H, Xu Y, Ling Y. Revealing the mechanism of Dahuang Huanglian Xiexin Decoction attenuates dysbiosis via IL-17 signaling pathway based on network pharmacology and experimental validation. JOURNAL OF ETHNOPHARMACOLOGY 2024; 331:118267. [PMID: 38688354 DOI: 10.1016/j.jep.2024.118267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Revised: 04/13/2024] [Accepted: 04/25/2024] [Indexed: 05/02/2024]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Dahuang Huanglian Xiexin Decoction (XXD), derived from Zhang Zhongjing's Treatise on Typhoid Fever, has a long history of medicinal use and is widely used for digestive system diseases. It is mainly composed of three natural medicines, including Dahuang (Rheum palmatum L.), Huanglian (Coptis chinensis Franch.), and Huangqin (Scutellaria baicalensis Georgi). Modern pharmacological research shows that the active ingredients of XXD can have a positive effect on intestinal flora regulatory effect, but its mechanism of action is unclear. AIMS OF THIS STUDY Clarify the effect of XXD on regulating dysbiosis, and elucidate the mechanism of XXD in alleviating dysbiosis based on network pharmacology, molecular docking and experimental verification. METHODS Histopathological observation and intestinal high-throughput sequencing were used to observe the effect. Preliminary prediction of the mechanism of action of XXD in treating dysbiosis through network pharmacology and molecular docking. Finally, the effect of XXD on the IL-17 signaling pathway was verified through in vivo experiments. RESULTS Histopathology and high-throughput sequencing of intestinal flora indicated that XXD has a good regulatory effect on bacterial dysbiosis. At the same time, network pharmacology identified a total of 40 active compounds, 14 of which may be key compounds for XXD to treat dysbiosis. In addition, the study also revealed 14 potential key targets as well as the top 5 therapeutic targets: IL-6, TNF-α, IL-1β, TP53 and PTGS2. GO and KEGG predicted the key pathway for IL-17 signaling pathway to play a role in XXD. In the verification of the prediction results, it was found that the above targets and the IL-17 target showed strong activity in molecular docking. Furthermore, it was found that XXD can reduce the levels of IL-17, IL-6, TNF-α, IL-1β, p53 and COX-2 in serum, while inhibiting the expression of IL-17, IL-17RA, Act-1 and NF-κB protein and the mRNA expression of IL-17, IL-17RA and Act-1 in colon tissue. CONCLUSIONS This study found that XXD has a good regulatory effect on dysbiosis and its induced symptoms. Network pharmacology was used to predict the key compounds and therapeutic targets of XXD, and preliminary experiments confirmed that XXD may regulate bacterial dysbiosis by inhibiting the IL-17 signaling pathway.
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Affiliation(s)
- Tianyi Ren
- The First School of Clinical Medicine, Nanjing University of Chinese Medicine, 210023, Nanjing, China
| | - Hui Feng
- School of Chinese Medicine, Nanjing University of Chinese Medicine, 210023, Nanjing, China
| | - Yong Xu
- School of Chinese Medicine, Nanjing University of Chinese Medicine, 210023, Nanjing, China.
| | - Yun Ling
- School of Chinese Medicine, Nanjing University of Chinese Medicine, 210023, Nanjing, China.
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11
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Singh D, Mehghini P, Rodriguez-Palacios A, Di Martino L, Cominelli F, Basson AR. Anti-Inflammatory Effect of Dietary Pentadecanoic Fatty Acid Supplementation on Inflammatory Bowel Disease in SAMP1/YitFc Mice. Nutrients 2024; 16:3031. [PMID: 39275347 PMCID: PMC11397537 DOI: 10.3390/nu16173031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2024] [Revised: 09/03/2024] [Accepted: 09/05/2024] [Indexed: 09/16/2024] Open
Abstract
BACKGROUND/OBJECTIVES Dietary fats have been linked to the increasing incidence of chronic diseases, including inflammatory bowel diseases (IBD), namely, Crohn's disease (CD). METHODS This study investigated the impact of pentadecanoic acid (C15:0), a type of an odd-numbered chain saturated fatty acid, for its potential anti-inflammatory properties in different mouse models of experimental IBD using the SAMP1/YitFc (SAMP) mouse line (14- or 24-week-old), including chronic ileitis and DSS-induced colitis. To quantitively assess the effect of C:15, we tested two dosages of C:15 in selected experiments in comparison to control mice. Intestinal inflammation and intestinal permeability were used as primary outcomes. RESULTS In ileitis, C:15 supplementation showed an anti-inflammatory effect in SAMP mice (e.g., a reduction in ileitis severity vs. control p < 0.0043), which was reproducible when mice were tested in the DSS model of colitis (e.g., reduced permeability vs. control p < 0.0006). Of relevance, even the short-term C:15 therapy prevented colitis in mice by maintaining body weight, decreasing inflammation, preserving gut integrity, and alleviating colitis signs. CONCLUSIONS Collectively, the findings from both ileitis and colitis in SAMP mice indicate that C:15 may have therapeutic effects in the treatment of IBD (colitis in the short term). This promising effect has major translational potential for the alleviation of IBD in humans.
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Affiliation(s)
- Drishtant Singh
- Department of Nutrition, School of Medicine, Case Western Reserve University, Cleveland, OH 44106, USA;
- Division of Gastroenterology & Liver Diseases, School of Medicine, Case Western Reserve University, Cleveland, OH 44106, USA; (P.M.); (A.R.-P.); (F.C.)
| | - Paola Mehghini
- Division of Gastroenterology & Liver Diseases, School of Medicine, Case Western Reserve University, Cleveland, OH 44106, USA; (P.M.); (A.R.-P.); (F.C.)
- Digestive Health Research Institute, University Hospitals Cleveland Medical Center, Cleveland, OH 44106, USA
| | - Alexander Rodriguez-Palacios
- Division of Gastroenterology & Liver Diseases, School of Medicine, Case Western Reserve University, Cleveland, OH 44106, USA; (P.M.); (A.R.-P.); (F.C.)
- Digestive Health Research Institute, University Hospitals Cleveland Medical Center, Cleveland, OH 44106, USA
- Mouse Models Core, Silvio O’Conte Cleveland Digestive Diseases Research Core Center, Cleveland, OH 44106, USA
- Germ-Free and Gut Microbiome Core, Digestive Health Research Institute, Case Western Reserve University, Cleveland, OH 44106, USA
- Department of Molecular Biology and Microbiology, Case Western Reserve University, Cleveland, OH 44106, USA
| | - Luca Di Martino
- Case Digestive Health Research Institute, School of Medicine, Case Western Reserve University, Cleveland, OH 44106, USA;
- Department of Medicine, School of Medicine, Case Western Reserve University, Cleveland, OH 44106, USA
| | - Fabio Cominelli
- Division of Gastroenterology & Liver Diseases, School of Medicine, Case Western Reserve University, Cleveland, OH 44106, USA; (P.M.); (A.R.-P.); (F.C.)
- Digestive Health Research Institute, University Hospitals Cleveland Medical Center, Cleveland, OH 44106, USA
- Mouse Models Core, Silvio O’Conte Cleveland Digestive Diseases Research Core Center, Cleveland, OH 44106, USA
- Germ-Free and Gut Microbiome Core, Digestive Health Research Institute, Case Western Reserve University, Cleveland, OH 44106, USA
| | - Abigail Raffner Basson
- Department of Nutrition, School of Medicine, Case Western Reserve University, Cleveland, OH 44106, USA;
- Division of Gastroenterology & Liver Diseases, School of Medicine, Case Western Reserve University, Cleveland, OH 44106, USA; (P.M.); (A.R.-P.); (F.C.)
- Digestive Health Research Institute, University Hospitals Cleveland Medical Center, Cleveland, OH 44106, USA
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12
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Alsegiani AS, Shah ZA. Age-dependent sex differences in cofilin1 pathway (LIMK1/SSH1) and its association with AD biomarkers after chronic systemic inflammation in mice. Neurobiol Aging 2024; 144:43-55. [PMID: 39265451 DOI: 10.1016/j.neurobiolaging.2024.09.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2024] [Revised: 08/15/2024] [Accepted: 09/04/2024] [Indexed: 09/14/2024]
Abstract
Chronic systemic inflammation (CSI) results in neuroinflammation and neurodegeneration. Cofilin1 is a stress protein that activates microglia and induces neuroinflammation, but its role in CSI at different aging stages remains unidentified. Therefore, the study aims to identify cofilin1 and its upstream regulators LIMK1 and SSH1 after CSI in young-, middle-, and advanced-aged mice. CSI was induced by injecting the male and female mice with a sub-lethal dose of Lipopolysaccharide weekly for six weeks. The results showed that normal male mice did not show cofilin pathway dysregulation, but a significant dysregulation was observed in CSI advanced-aged mice. In females, cofilin1 dysregulation was observed in healthy and CSI advanced-aged mice, while significant cofilin1 dysregulation was observed in middle-aged mice during CSI. Furthermore, cofilin1 pathway dysregulations correlated with Alzheimer's disease (AD) biomarkers in the brain and saliva, astrocyte activation, synaptic degeneration, neurobehavioral impairments, gut-microbiota abnormalities, and circulatory inflammation. These results provide new insights into cofilin1 sex and age-dependent mechanistic differences that might help identify targets for modulating neuroinflammation and early onset of AD.
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Affiliation(s)
- Amsha S Alsegiani
- Department of Medicinal and Biological Chemistry, College of Pharmacy and Pharmaceutical Sciences, University of Toledo, Toledo, OH 43614, USA
| | - Zahoor A Shah
- Department of Medicinal and Biological Chemistry, College of Pharmacy and Pharmaceutical Sciences, University of Toledo, Toledo, OH 43614, USA.
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13
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Stiel L, Gaudet A, Thietart S, Vallet H, Bastard P, Voiriot G, Oualha M, Sarton B, Kallel H, Brechot N, Kreitmann L, Benghanem S, Joffre J, Jouan Y. Innate immune response in acute critical illness: a narrative review. Ann Intensive Care 2024; 14:137. [PMID: 39227416 PMCID: PMC11371990 DOI: 10.1186/s13613-024-01355-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Accepted: 07/23/2024] [Indexed: 09/05/2024] Open
Abstract
BACKGROUND Activation of innate immunity is a first line of host defense during acute critical illness (ACI) that aims to contain injury and avoid tissue damages. Aberrant activation of innate immunity may also participate in the occurrence of organ failures during critical illness. This review aims to provide a narrative overview of recent advances in the field of innate immunity in critical illness, and to consider future potential therapeutic strategies. MAIN TEXT Understanding the underlying biological concepts supporting therapeutic strategies modulating immune response is essential in decision-making. We will develop the multiple facets of innate immune response, especially its cellular aspects, and its interaction with other defense mechanisms. We will first describe the pathophysiological mechanisms of initiation of innate immune response and its implication during ACI. We will then develop the amplification of innate immunity mediated by multiple effectors. Our review will mainly focus on myeloid and lymphoid cellular effectors, the major actors involved in innate immune-mediated organ failure. We will third discuss the interaction and integration of innate immune response in a global view of host defense, thus considering interaction with non-immune cells through immunothrombosis, immunometabolism and long-term reprogramming via trained immunity. The last part of this review will focus on the specificities of the immune response in children and the older population. CONCLUSIONS Recent understanding of the innate immune response integrates immunity in a highly dynamic global vision of host response. A better knowledge of the implicated mechanisms and their tissue-compartmentalization allows to characterize the individual immune profile, and one day eventually, to develop individualized bench-to-bedside immunomodulation approaches as an adjuvant resuscitation strategy.
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Affiliation(s)
- Laure Stiel
- Department of Intensive Care Medicine, Groupe Hospitalier de la Région Mulhouse Sud Alsace, Mulhouse, France.
- Lipness Team, INSERM Research Team, LNC UMR 1231 and LabEx LipSTIC, University of Burgundy, Dijon, France.
| | - Alexandre Gaudet
- CHU Lille, Department of Intensive Care Medicine, Critical Care Center, Univ. Lille, 59000, Lille, France
- CIIL (Centre d'Infection et d'Immunité de Lille), Institut Pasteur de Lille, U1019-UMR9017, 59000, Lille, France
| | - Sara Thietart
- Département de Gériatrie, Sorbonne Université, Assistance Publique-Hôpitaux de Paris (AP-HP), Hôpital Pitié-Salpêtrière, Paris, France
- Inserm, PARCC U970, F75, Université Paris Cité, Paris, France
| | - Hélène Vallet
- Department of Geriatric Medicine, Sorbonne Université, Assistance Publique-Hôpitaux de Paris (APHP), Hôpital Saint Antoine, Paris, France
- INSERM UMR1135, Centre d'immunologie et des Maladies Infectieuses, Sorbonne Université, Paris, France
| | - Paul Bastard
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, INSERM U1163, Necker Hospital for Sick Children, Paris, France
- Imagine Institute, University of Paris, Paris, France
- Pediatric Hematology-Immunology and Rheumatology Unit, Necker Hospital for Sick Children, Assistance Publique-Hôpitaux de Paris (AP-HP), Paris, France
| | - Guillaume Voiriot
- Service de Médecine Intensive Réanimation, Hôpital Tenon, Hôpitaux de Paris, Paris, France
- Centre de Recherche, Saint-Antoine UMRS_938, INSERM, Sorbonne Université, Assistance Publique, Paris, France
| | - Mehdi Oualha
- Pediatric Intensive Care Unit, Necker Hospital, APHP, Centre-Paris University, Paris, France
| | - Benjamine Sarton
- Service de Réanimation Polyvalente Purpan, Centre Hospitalier Universitaire de Toulouse, Toulouse, France
- ToNIC Lab (Toulouse NeuroImaging Center) INSERM/UPS UMR 1214, 31300, Toulouse, France
| | - Hatem Kallel
- Service de Réanimation, Centre Hospitalier de Cayenne, Guyane, France
| | - Nicolas Brechot
- Service de Médecine Intensive Réanimation, Sorbonne Université, Hôpitaux Universitaires Pitié Salpêtrière- Charles Foix, Assistance Publique-Hôpitaux de Paris (AP-HP), Paris, France
- Center for Interdisciplinary Research in Biology (CIRB)-UMRS, INSERM U1050-CNRS 7241, College de France, Paris, France
| | - Louis Kreitmann
- Centre for Antimicrobial Optimisation, Department of Infectious Disease, Faculty of Medicine, Imperial College London, London, W12 0HS, UK
- ICU West, The Hammersmith Hospital, Du Cane Road, London, W12 0HS, UK
| | - Sarah Benghanem
- Service de Médecine Intensive Réanimation, Hôpital Cochin, Assistance Publique-Hôpitaux de Paris (AP-HP), Paris, France
| | - Jérémie Joffre
- Service de Réanimation Médicale, Hôpital de Saint Antoine, Assistance Publique-Hôpitaux de Paris (AP-HP), Paris, France
- Centre de Recherche Saint Antoine INSERM, U938, Sorbonne University, Paris, France
| | - Youenn Jouan
- Service de Médecine Intensive Réanimation, CHRU Tours, Tours, France
- Services de Réanimation Chirurgicale Cardiovasculaire et de Chirurgie Cardiaque, CHRU Tours, Tours, France
- INSERM, U1100 Centre d'Etudes des Pathologies Respiratoires, Faculté de Médecine de Tours, Tours, France
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14
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Wang Z, Yang S, Tong L, Li X, Mao W, Yuan H, Chen Y, Zhang S, Zhang H, Chen R. eIF6 deficiency regulates gut microbiota, decreases systemic inflammation, and alleviates atherosclerosis. mSystems 2024:e0059524. [PMID: 39225466 DOI: 10.1128/msystems.00595-24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2024] [Accepted: 07/20/2024] [Indexed: 09/04/2024] Open
Abstract
Altered composition of the gut microbiota affects immunity and metabolism. This study previously found that eIF6 gene knockdown changes the composition of the intestinal flora in the eIF6 gene knockdown mouse model. Lactobacillus acidophilus is significantly increased in the model. This study was designed to investigate the role of L. acidophilus in the pathogenesis of atherosclerosis. Transcriptomic data from 117 patients with coronary artery disease (CAD) and 79 healthy individuals were obtained. ApoE-/- and ApoE-/-/eIF6+/- mice on normal chow diet or a high-fat diet were treated for 16 weeks; eIF6 deficiency was evaluated atherosclerosis. ApoE-/- mice on normal chow diet or a high-fat diet were treated with L. acidophilus by daily oral gavage for 16 weeks. Moreover, one group was treated with lipopolysaccharide at 12 weeks. The levels of eIF6, RNASE3, and RSAD2 were notably higher in the patients with CAD than in the healthy individuals. eIF6 deficiency altered the composition of gut microbiota. eIF6 deficiency reduced the atherosclerotic lesion formation in ApoE-/-/eIF6+/- mice compared with the ApoE-/- mice. The microbial sequencing and metabolomics analysis demonstrated some beneficial bacterial (L. acidophilus, Ileibacterium, and Bifidobacterium) and metabolic levels significantly had deference in ApoE-/-/eIF6+/- mice compared with the ApoE-/- mice. Correlational studies indicated that L. acidophilus had close correlations with low-density lipoprotein cholesterol, lesion area, and necrotic area. L. acidophilus inhibited high-fat diet-induced inflammation and atherosclerotic lesion, increasing the expression of tight junction proteins (ZO-1 and claudin-1) and reducing the gut permeability. However, lipopolysaccharide reversed the protective effect of L. acidophilus against atherosclerosis. eIF6 deficiency protected against atherosclerosis by regulating the composition of gut microbiota and metabolites. L. acidophilus attenuated atherosclerotic lesions by reducing inflammation and increasing gut permeability.IMPORTANCEeIF6 deficiency modulates the gut microbiota and multiple metabolites in atherosclerotic ApoE-/- mice. L. acidophilus was reduced in the gut of atherosclerotic ApoE-/- mice, but administration of Lactobacillus acidophilus reversed intestinal barrier dysfunction and vascular inflammation. Our findings suggest that targeting individual species is a beneficial therapeutic strategy to prevent inflammation and atherosclerosis.
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Affiliation(s)
- Zhenzhen Wang
- Cancer Institute, Xuzhou Medical University, Xuzhou, China
| | - Shuai Yang
- College of Life Sciences, Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Linglin Tong
- College of Life Sciences, Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Xin Li
- College of Life Sciences, Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Weiyi Mao
- School of Basic Medical Sciences, Nanjing Medical University, Jiangsu, China
| | - Honghua Yuan
- College of Life Sciences, Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Yang Chen
- College of Life Sciences, Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Shenyang Zhang
- Department of Neurology, the Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - He Zhang
- College of Life Sciences, Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Renjin Chen
- College of Life Sciences, Xuzhou Medical University, Xuzhou, Jiangsu, China
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15
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Zhao Y, Si S, Ren Y, Wu X, Zhang Z, Tian Y, Li J, Li Y, Hou M, Yao X, Xu Z, Jiang R, Kang X, Gong Y, Li Q, Tian Y. Marine red yeast supplementation improves laying performance by regulating small intestinal homeostasis in aging chickens. ANIMAL NUTRITION (ZHONGGUO XU MU SHOU YI XUE HUI) 2024; 18:177-190. [PMID: 39263442 PMCID: PMC11388669 DOI: 10.1016/j.aninu.2024.04.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Revised: 02/25/2024] [Accepted: 04/03/2024] [Indexed: 09/13/2024]
Abstract
Recent studies have shown that age-related aging evolution is accompanied by imbalances in intestinal homeostasis. Marine red yeast (MRY) is a functional probiotic that has been shown to have antioxidant, immune and other properties. Therefore, we chose 900 healthy Hy-Line Brown hens at 433 d old as the research subjects and evaluated the correlation between intestinal health, laying performance, and egg quality in aged hens through the supplementation of MRY. These laying hens were assigned into 5 groups and received diet supplementation with 0%, 0.5%, 1.0%, 1.5%, and 2% MRY for 12 weeks. The results showed that MRY supplementation increased egg production rate, average egg weight, and egg quality, and decreased feed conversion ratio and daily feed intake (P < 0.05). The MRY supplement improved antioxidant indicators such as superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GSH-Px), stimulated villus height, and increased the villus height to crypt depth ratio (V/C ratio) in the intestine (P < 0.05). It also regulated the expression of intestinal inflammatory factors (transforming growth factor-β [TGF-β], interleukin [IL]-1β, IL-8, tumor necrosis factor-α [TNF-α]) while increasing serum immunoglobulin G (IgG) levels (P < 0.05). Furthermore, MRY supplementation upregulated the mRNA expression of tight junction proteins (occludin and zonula occludens-1 [ZO-1]), anti-apoptotic gene (Bcl-2), and autophagy-related proteins (beclin-1 and light chain 3I [LC3I]) in the intestine (P < 0.05). The MRY supplement also led to an increase in the concentration of short-chain fatty acids in the cecum, and the relative abundance of the phylum Bacteroidetes, and genera Bacteroides and Rikenellaceae_RC9_gut_group. The LEfSe analysis revealed an enrichment of Sutterella and Akkermansia muciniphila. In conclusion, the results of this experiment indicated that the additional supplementation of MRY can improve the production performance of laying hens and may contribute to the restoration and balance of intestinal homeostasis, which supports the application potential of MRY as a green and efficient feed additive for improving the laying performance in chickens.
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Affiliation(s)
- Yudian Zhao
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou 450046, China
- Henan Key Laboratory for Innovation and Utilization of Chicken Germplasm Resources, Zhengzhou 450046, China
| | - Sujin Si
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou 450046, China
- Henan Key Laboratory for Innovation and Utilization of Chicken Germplasm Resources, Zhengzhou 450046, China
| | - Yangguang Ren
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou 450046, China
- Henan Key Laboratory for Innovation and Utilization of Chicken Germplasm Resources, Zhengzhou 450046, China
| | - Xing Wu
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou 450046, China
- Henan Key Laboratory for Innovation and Utilization of Chicken Germplasm Resources, Zhengzhou 450046, China
| | - Zihao Zhang
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou 450046, China
- Henan Key Laboratory for Innovation and Utilization of Chicken Germplasm Resources, Zhengzhou 450046, China
| | - Yixiang Tian
- College of Animal Science and Veterinary Medicine, Henan Institute of Science and Technology, Xinxiang 453003, China
| | - Jing Li
- AB Vista, Marlborough SN8 4AN, UK
| | - Yijie Li
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou 450046, China
- Henan Key Laboratory for Innovation and Utilization of Chicken Germplasm Resources, Zhengzhou 450046, China
| | - Meng Hou
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou 450046, China
- Henan Key Laboratory for Innovation and Utilization of Chicken Germplasm Resources, Zhengzhou 450046, China
| | - Xueyang Yao
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou 450046, China
| | - Zhaoheng Xu
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou 450046, China
| | - Ruirui Jiang
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou 450046, China
- Henan Key Laboratory for Innovation and Utilization of Chicken Germplasm Resources, Zhengzhou 450046, China
| | - Xiangtao Kang
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou 450046, China
- Henan Key Laboratory for Innovation and Utilization of Chicken Germplasm Resources, Zhengzhou 450046, China
| | - Yujie Gong
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou 450046, China
- Henan Key Laboratory for Innovation and Utilization of Chicken Germplasm Resources, Zhengzhou 450046, China
| | - Qiang Li
- Henan College of Animal Husbandry and Economics, Zhengzhou 450046, China
| | - Yadong Tian
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou 450046, China
- Henan Key Laboratory for Innovation and Utilization of Chicken Germplasm Resources, Zhengzhou 450046, China
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16
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Chen LA, Boyle K. The Role of the Gut Microbiome in Health and Disease in the Elderly. Curr Gastroenterol Rep 2024; 26:217-230. [PMID: 38642272 PMCID: PMC11282161 DOI: 10.1007/s11894-024-00932-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/05/2024] [Indexed: 04/22/2024]
Abstract
PURPOSE OF REVIEW Growing evidence supports the contribution of age in the composition and function of the gut microbiome, with specific findings associated with health in old age and longevity. RECENT FINDINGS Current studies have associated certain microbiota, such as Butyricimonas, Akkermansia, and Odoribacter, with healthy aging and the ability to survive into extreme old age. Furthermore, emerging clinical and pre-clinical research have shown promising mechanisms for restoring a healthy microbiome in elderly populations through various interventions such as fecal microbiota transplant (FMT), dietary interventions, and exercise programs. Despite several conceptually exciting interventional studies, the field of microbiome research in the elderly remains limited. Specifically, large longitudinal studies are needed to better understand causative relationships between the microbiome and healthy aging. Additionally, individualized approaches to microbiome interventions based on patients' co-morbidities and the underlying functional capacity of their microbiomes are needed to achieve optimal results.
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Affiliation(s)
- Lea Ann Chen
- Division of Gastroenterology and Hepatology, Department of Medicine, Rutgers, New Brunswick, NJ, USA.
| | - Kaitlyn Boyle
- Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ, USA
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17
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Borrego-Ruiz A, Borrego JJ. Influence of human gut microbiome on the healthy and the neurodegenerative aging. Exp Gerontol 2024; 194:112497. [PMID: 38909763 DOI: 10.1016/j.exger.2024.112497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 05/16/2024] [Accepted: 06/17/2024] [Indexed: 06/25/2024]
Abstract
The gut microbiome plays a crucial role in host health throughout the lifespan by influencing brain function during aging. The microbial diversity of the human gut microbiome decreases during the aging process and, as a consequence, several mechanisms increase, such as oxidative stress, mitochondrial dysfunction, inflammatory response, and microbial gut dysbiosis. Moreover, evidence indicates that aging and neurodegeneration are closely related; consequently, the gut microbiome may serve as a novel marker of lifespan in the elderly. In this narrative study, we investigated how the changes in the composition of the gut microbiome that occur in aging influence to various neuropathological disorders, such as mild cognitive impairment (MCI), dementia, Alzheimer's disease (AD), and Parkinson's disease (PD); and which are the possible mechanisms that govern the relationship between the gut microbiome and cognitive impairment. In addition, several studies suggest that the gut microbiome may be a potential novel target to improve hallmarks of brain aging and to promote healthy cognition; therefore, current and future therapeutic interventions have been also reviewed.
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Affiliation(s)
- Alejandro Borrego-Ruiz
- Departamento de Psicología Social y de las Organizaciones, Universidad Nacional de Educación a Distancia (UNED), Madrid, Spain
| | - Juan J Borrego
- Departamento de Microbiología, Universidad de Málaga, Málaga, Spain; Instituto de Investigación Biomédica de Málaga y Plataforma en Nanomedicina-IBIMA, Plataforma BIONAND, Málaga, Spain.
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18
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Reveles KR, Strey KA, Albuquerque EL, Jacota D, Jones X, Carreno JJ. Retrospective, propensity score--matched study examining the relationship between frailty and Clostridioides difficile infection in a national cohort of US veterans. Am J Infect Control 2024:S0196-6553(24)00687-4. [PMID: 39197729 DOI: 10.1016/j.ajic.2024.08.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2024] [Revised: 08/21/2024] [Accepted: 08/21/2024] [Indexed: 09/01/2024]
Abstract
BACKGROUND Frailty is often more predictive of disease and mortality compared with chronological age. This study determined the impact of frailty on Clostridioides difficile infection (CDI) risk and outcomes in a national veteran population. METHODS This was a retrospective cohort study of CDI and control veteran inpatients and outpatients from fiscal year 2003 to 2018. Baseline frailty was presented as the Veterans Affairs (VA) Frailty Index. Propensity score--matched analyses were conducted to compare CDI risk, CDI health outcomes, and 1-year new-onset frailty-associated conditions. RESULTS A total of 11,451 CDI and 11,451 matched control patients were included. Baseline frailty conditions were more common among CDI patients, especially involuntary weight loss (6.0% vs 3.4%, P < .001) and anemia (24.6% vs 18.7%, P < .001). VA Frailty Index was significantly higher for CDI patients (0.13 vs 0.11, P = .019). Frail CDI patients were more likely to experience 30-day mortality (11.3% vs 1.1%, P < .001) and 60-day CDI recurrence (20.4% vs 16.3%, P < .001) compared with non-/prefrail CDI patients. At 1year, CDI patients were significantly more likely to be categorized as frail (19.6% vs 17.0%, P < .001). CONCLUSIONS This study demonstrated the potential association between frailty and CDI risk and health outcomes, as well as new-onset frailty diagnoses in patients who develop CDI.
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Affiliation(s)
- Kelly R Reveles
- College of Pharmacy, The University of Texas at Austin, Austin, TX; School of Medicine, University of Texas Health San Antonio, San Antonio, TX; Research Department, South Texas Veterans Health Care System, San Antonio, TX.
| | - Kelsey A Strey
- College of Pharmacy, The University of Texas at Austin, Austin, TX; School of Medicine, University of Texas Health San Antonio, San Antonio, TX
| | - Esther L Albuquerque
- College of Pharmacy, The University of Texas at Austin, Austin, TX; School of Medicine, University of Texas Health San Antonio, San Antonio, TX
| | - Damaris Jacota
- College of Pharmacy, The University of Texas at Austin, Austin, TX; School of Medicine, University of Texas Health San Antonio, San Antonio, TX
| | - Xavier Jones
- College of Pharmacy, The University of Texas at Austin, Austin, TX; Research Department, South Texas Veterans Health Care System, San Antonio, TX
| | - Joseph J Carreno
- Department of Pharmacy Practice, Albany College of Pharmacy and Health Sciences, Albany, NY
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19
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Yang Y, Rao T, Wei S, Cheng J, Zhan Y, Lin T, Chen J, Zhong X, Jiang Y, Yang S. Role of inflammatory cytokines and the gut microbiome in vascular dementia: insights from Mendelian randomization analysis. Front Microbiol 2024; 15:1398618. [PMID: 39247699 PMCID: PMC11380139 DOI: 10.3389/fmicb.2024.1398618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2024] [Accepted: 07/10/2024] [Indexed: 09/10/2024] Open
Abstract
Background Both inflammatory cytokines and the gut microbiome are susceptibility factors for vascular dementia (VaD). The trends in the overall changes in the dynamics of inflammatory cytokines and in the composition of the gut microbiome are influenced by a variety of factors, making it difficult to fully explain the different effects of both on the different subtypes of VaD. Therefore, this Mendelian randomization (MR) study identified the inflammatory cytokines and gut microbiome members that influence the risk of developing VaD and their causal effects, and investigated whether inflammatory cytokines are gut microbiome mediators affecting VaD. Methods We obtained pooled genome-wide association study (GWAS) data for 196 gut microbiota and 41 inflammatory cytokines and used GWAS data for six VaD subtypes, namely, VaD (mixed), VaD (multiple infarctions), VaD (other), VaD (subcortical), VaD (sudden onset), and VaD (undefined). We used the inverse-variance weighted (IVW) method as the primary MR analysis method. We conducted sensitivity analyses and reverse MR analyses to examine reverse causal associations, enhancing the reliability and stability of the conclusions. Finally, we used multivariable MR (MVMR) analysis to assess the direct causal effects of inflammatory cytokines and the gut microbiome on the risk of VaD, and performed mediation MR analysis to explore whether inflammatory factors were potential mediators. Results Our two-sample MR study revealed relationships between the risk of six VaD subtypes and inflammatory cytokines and the gut microbiota: 7 inflammatory cytokines and 14 gut microbiota constituents were positively correlated with increased VaD subtype risk, while 2 inflammatory cytokines and 11 gut microbiota constituents were negatively correlated with decreased VaD subtype risk. After Bonferroni correction, interleukin-18 was correlated with an increased risk of VaD (multiple infarctions); macrophage migration inhibitory factor was correlated with an increased risk of VaD (sudden onset); interleukin-4 was correlated with a decreased risk of VaD (other); Ruminiclostridium 6 and Bacillales were positively and negatively correlated with the risk of VaD (undefined), respectively; Negativicutes and Selenomonadales were correlated with a decreased risk of VaD (mixed); and Melainabacteria was correlated with an increased risk of VaD (multiple infarctions). Sensitivity analyses revealed no multilevel effects or heterogeneity and no inverse causality between VaD and inflammatory cytokines or the gut microbiota. The MVMR results further confirmed that the causal effects of Negativicutes, Selenomonadales, and Melainabacteria on VaD remain significant. Mediation MR analysis showed that inflammatory cytokines were not potential mediators. Conclusion This study helps us to better understand the pathological mechanisms of VaD and suggests the potential value of targeting increases or decreases in inflammatory cytokines and gut microbiome members for VaD prevention and intervention.
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Affiliation(s)
- Yihan Yang
- The Institution of Rehabilitation Industry, Fujian University of Traditional Chinese Medicine, Fuzhou, China
| | - Ting Rao
- The Institution of Rehabilitation Industry, Fujian University of Traditional Chinese Medicine, Fuzhou, China
- Fujian Rehabilitation Hospital, Fujian University of Traditional Chinese Medicine Subsidiary Rehabilitation Hospital, Fuzhou, China
| | - Sheng Wei
- Department of General Practice, The Second Affiliated Hospital of Wannan Medical College, Anhui, China
| | - Jing Cheng
- Fujian Rehabilitation Hospital, Fujian University of Traditional Chinese Medicine Subsidiary Rehabilitation Hospital, Fuzhou, China
| | - Ying Zhan
- The Institution of Rehabilitation Industry, Fujian University of Traditional Chinese Medicine, Fuzhou, China
| | - Teng Lin
- The First Clinical Medical College, Fujian University of Traditional Chinese Medicine, Fuzhou, China
| | - Jincheng Chen
- The Institution of Rehabilitation Industry, Fujian University of Traditional Chinese Medicine, Fuzhou, China
- Fujian Rehabilitation Hospital, Fujian University of Traditional Chinese Medicine Subsidiary Rehabilitation Hospital, Fuzhou, China
| | - Xiaoling Zhong
- Guangdong Provincial Hospital of Chinese Medicine, The Second Clinical School of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Yijing Jiang
- Fujian Rehabilitation Hospital, Fujian University of Traditional Chinese Medicine Subsidiary Rehabilitation Hospital, Fuzhou, China
| | - Shanli Yang
- Fujian Rehabilitation Hospital, Fujian University of Traditional Chinese Medicine Subsidiary Rehabilitation Hospital, Fuzhou, China
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20
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Noh JY, Han HW, Kim DM, Giles ED, Farnell YZ, Wright GA, Sun Y. Innate immunity in peripheral tissues is differentially impaired under normal and endotoxic conditions in aging. Front Immunol 2024; 15:1357444. [PMID: 39221237 PMCID: PMC11361940 DOI: 10.3389/fimmu.2024.1357444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Accepted: 07/22/2024] [Indexed: 09/04/2024] Open
Abstract
Chronic low-grade inflammation is a hallmark of aging, aka "inflammaging", which is linked to a wide range of age-associated diseases. Immune dysfunction increases disease susceptibility, and increases morbidity and mortality of aging. Innate immune cells, including monocytes, macrophages and neutrophils, are the first responders of host defense and the key mediators of various metabolic and inflammatory insults. Currently, the understanding of innate immune programming in aging is largely fragmented. Here we investigated the phenotypic and functional properties of innate immune cells in various peripheral tissues of young and aged mice under normal and endotoxic conditions. Under the steady state, aged mice showed elevated pro-inflammatory monocytes/macrophages in peripheral blood, adipose tissue, liver, and colon. Under lipopolysaccharide (LPS)-induced inflammatory state, the innate immune cells of aged mice showed a different response to LPS stimulus than that of young mice. LPS-induced immune responses displayed differential profiles in different tissues and cell types. In the peripheral blood, when responding to LPS, the aged mice showed higher neutrophils, but lower pro-inflammatory monocytes than that in young mice. In the peritoneal fluid, while young mice exhibited significantly elevated pro-inflammatory neutrophils and macrophages in response to LPS, aged mice exhibited decreased pro-inflammatory neutrophils and variable cytokine responses in macrophages. In the adipose tissue, LPS induced less infiltrated neutrophils but more infiltrated macrophages in old mice than young mice. In the liver, aged mice showed a more robust increase of pro-inflammatory macrophages compared to that in young mice under LPS stimulation. In colon, macrophages showed relatively mild response to LPS in both young and old mice. We have further tested bone-marrow derived macrophages (BMDM) from young and aged mice, we found that BMDM from aged mice have impaired polarization, displaying higher expression of pro-inflammatory markers than those from young mice. These data collectively suggest that innate immunity in peripheral tissues is impaired in aging, and the dysregulation of immunity is tissue- and cell-dependent. Our findings in the rodent model underscore the complexity of aging immunity. Further investigation is needed to determine whether the immune profile observed in aged mice is applicable in age-associated diseases in humans.
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Affiliation(s)
- Ji Yeon Noh
- Department of Nutrition, Texas A&M University, College Station, TX, United States
| | - Hye Won Han
- Department of Nutrition, Texas A&M University, College Station, TX, United States
| | - Da Mi Kim
- Department of Nutrition, Texas A&M University, College Station, TX, United States
| | - Erin D. Giles
- School of Kinesiology, University of Michigan, Ann Arbor, MI, United States
| | - Yuhua Z. Farnell
- Department of Poultry Science, Texas A&M University, College Station, TX, United States
| | - Gus A. Wright
- Department of Veterinary Pathobiology, Texas A&M University,
College Station, TX, United States
| | - Yuxiang Sun
- Department of Nutrition, Texas A&M University, College Station, TX, United States
- Department of Biochemistry & Biophysics, Texas A&M University, College Station, TX, United States
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21
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Jang DH, Shin JW, Shim E, Ohtani N, Jeon OH. The connection between aging, cellular senescence and gut microbiome alterations: A comprehensive review. Aging Cell 2024:e14315. [PMID: 39148278 DOI: 10.1111/acel.14315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2024] [Revised: 07/24/2024] [Accepted: 08/06/2024] [Indexed: 08/17/2024] Open
Abstract
The intricate interplay between cellular senescence and alterations in the gut microbiome emerges as a pivotal axis in the aging process, increasingly recognized for its contribution to systemic inflammation, physiological decline, and predisposition to age-associated diseases. Cellular senescence, characterized by a cessation of cell division in response to various stressors, induces morphological and functional changes within tissues. The complexity and heterogeneity of senescent cells, alongside the secretion of senescence-associated secretory phenotype, exacerbate the aging process through pro-inflammatory pathways and influence the microenvironment and immune system. Concurrently, aging-associated changes in gut microbiome diversity and composition contribute to dysbiosis, further exacerbating systemic inflammation and undermining the integrity of various bodily functions. This review encapsulates the burgeoning research on the reciprocal relationship between cellular senescence and gut dysbiosis, highlighting their collective impact on age-related musculoskeletal diseases, including osteoporosis, sarcopenia, and osteoarthritis. It also explores the potential of modulating the gut microbiome and targeting cellular senescence as innovative strategies for healthy aging and mitigating the progression of aging-related conditions. By exploring targeted interventions, including the development of senotherapeutic drugs and probiotic therapies, this review aims to shed light on novel therapeutic avenues. These strategies leverage the connection between cellular senescence and gut microbiome alterations to advance aging research and development of interventions aimed at extending health span and improving the quality of life in the older population.
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Affiliation(s)
- Dong-Hyun Jang
- Department of Biomedical Sciences, Korea University College of Medicine, Seoul, Republic of Korea
| | - Ji-Won Shin
- Department of Biomedical Sciences, Korea University College of Medicine, Seoul, Republic of Korea
| | - Eunha Shim
- Department of Biomedical Sciences, Korea University College of Medicine, Seoul, Republic of Korea
| | - Naoko Ohtani
- Department of Pathophysiology, Osaka Metropolitan University Graduate School of Medicine, Osaka, Japan
| | - Ok Hee Jeon
- Department of Biomedical Sciences, Korea University College of Medicine, Seoul, Republic of Korea
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22
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Golshani M, Taylor JA, Woolbright BL. Understanding the microbiome as a mediator of bladder cancer progression and therapeutic response. Urol Oncol 2024:S1078-1439(24)00541-6. [PMID: 39117491 DOI: 10.1016/j.urolonc.2024.07.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2024] [Revised: 05/17/2024] [Accepted: 07/02/2024] [Indexed: 08/10/2024]
Abstract
Bladder cancer (BCa) remains a significant source of morbidity and mortality. BCa is one of the most expensive tumors to treat, in part because of a lack of nonsurgical options. The recent advent of immunotherapy, alone or in combination with other compounds, has improved therapeutic options. Resistance to immunotherapy remains common, and many patients do not have durable response. Recent advances indicate immunotherapy efficacy may be tied in part to the endogenous bacteria present in our body, more commonly referred to as the microbiome. Laboratory and clinical data now support the idea that a healthy microbiome is critical to effective response to immunotherapy. At the same time, pathogenic interactions between the microbiome and immune cells can also serve to drive formation of tumors, increasing the complexity of these interactions. Given the rising importance of immunotherapy in BCa, understanding how we might be able to alter the microbiome to improve therapeutic efficacy offers a novel route to improved patient care. The goal of this review is to examine our current understanding of microbial interactions with the immune system and cancer with an emphasis on BCa. We will further attempt to define both current gaps in knowledge and future directions that may yield beneficial results to the field.
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Affiliation(s)
- Mahgol Golshani
- School of Medicine, University of Kansas Medical Center, Kansas City, KS
| | - John A Taylor
- Department of Urology, University of Kansas Medical Center, Kansas City, KS; Department of Cancer Biology, University of Kansas Medical Center, Kansas City, KS
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23
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Sait AM, Day PJR. Interconnections between the Gut Microbiome and Alzheimer's Disease: Mechanisms and Therapeutic Potential. Int J Mol Sci 2024; 25:8619. [PMID: 39201303 PMCID: PMC11354889 DOI: 10.3390/ijms25168619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2024] [Revised: 07/23/2024] [Accepted: 08/06/2024] [Indexed: 09/02/2024] Open
Abstract
Alzheimer's disease (AD) is a neurodegenerative disease that is known to accumulate amyloid-β (Aβ) and tau protein. Clinical studies have not identified pathogenesis mechanisms or produced an effective cure for AD. The Aβ monoclonal antibody lecanemab reduces Aβ plaque formation for the treatment of AD, but more studies are required to increase the effectiveness of drugs to reduce cognitive decline. The lack of AD therapy targets and evidence of an association with an acute neuroinflammatory response caused by several bacteria and viruses in some individuals has led to the establishment of the infection hypothesis during the last 10 years. How pathogens cross the blood-brain barrier is highly topical and is seen to be pivotal in proving the hypothesis. This review summarizes the possible role of the gut microbiome in the pathogenesis of AD and feasible therapeutic approaches and current research limitations.
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Affiliation(s)
- Ahmad M. Sait
- Medical Laboratory Science, Faculty of Applied Medical Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia;
- Regenerative Medicine Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Philip J. R. Day
- Division of Evolution and Genomic Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester M13 9PL, UK
- Department of Medicine, University of Cape Town, Cape Town 7925, South Africa
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24
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Wang L, Deng Z, Li Y, Wu Y, Yao R, Cao Y, Wang M, Zhou F, Zhu H, Kang H. Ameliorative effects of mesenchymal stromal cells on senescence associated phenotypes in naturally aged rats. J Transl Med 2024; 22:722. [PMID: 39103873 DOI: 10.1186/s12967-024-05486-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Accepted: 07/03/2024] [Indexed: 08/07/2024] Open
Abstract
BACKGROUND Aging is a multifaceted process that affects all organ systems. With the increasing trend of population aging, aging-related diseases have resulted in significant medical challenges and socioeconomic burdens. Mesenchymal stromal cells (MSCs), due to their antioxidative stress, immunoregulatory, and tissue repair capabilities, hold promise as a potential anti-aging intervention. METHODS In this study, we transplanted MSCs into naturally aged rats at 24 months, and subsequently examined levels of aging-related factors such as β-galactosidase, superoxide dismutase, p16, p21 and malondialdehyde in multiple organs. Additionally, we assessed various aging-related phenotypes in these aged rats, including immune senescence, lipid deposition, myocardial fibrosis, and tissue damage. We also conducted a 16 S ribosomal ribonucleic acid (rRNA) analysis to study the composition of gut microbiota. RESULTS The results indicated that MSCs significantly reduced the levels of aging-associated and oxidative stress-related factors in multiple organs such as the heart, liver, and lungs of naturally aging rats. Furthermore, they mitigated chronic tissue damage and inflammation caused by aging, reduced levels of liver lipid deposition and myocardial fibrosis, alleviated aging-associated immunodeficiency and immune cell apoptosis, and positively influenced the gut microbiota composition towards a more youthful state. This research underscores the diverse anti-aging effects of MSCs, including oxidative stress reduction, tissue repair, metabolic regulation, and improvement of immune functions, shedding light on the underlying anti-aging mechanisms associated with MSCs. CONCLUSIONS The study confirms that MSCs hold great promise as a potential anti-aging approach, offering the possibility of extending lifespan and improving the quality of life in the elderly population.
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Affiliation(s)
- Lu Wang
- Department of Critical Care Medicine, The First Medical Center, Chinese PLA General Hospital, 28 Fuxing Road, Haidian District, Beijing, 100853, China
- Medical School of Chinese PLA, Beijing, 100853, China
- National Key Laboratory of Kidney Diseases, Beijing Key Laboratory of Kidney Disease Research, National Clinical Research Center for Kidney Diseases, Beijing, 100853, China
| | - Zihui Deng
- Department of Basic Medicine, Graduate School, Chinese PLA General Hospital, Beijing, 100853, China
| | - Yun Li
- Department of Critical Care Medicine, The First Medical Center, Chinese PLA General Hospital, 28 Fuxing Road, Haidian District, Beijing, 100853, China
- Medical School of Chinese PLA, Beijing, 100853, China
| | - Yiqi Wu
- Department of Critical Care Medicine, The First Medical Center, Chinese PLA General Hospital, 28 Fuxing Road, Haidian District, Beijing, 100853, China
- Medical School of Chinese PLA, Beijing, 100853, China
| | - Renqi Yao
- Department of General Surgery, The First Medical Center of Chinese PLA General Hospital, Beijing, 100853, China
| | - Yuan Cao
- Department of Critical Care Medicine, The First Medical Center, Chinese PLA General Hospital, 28 Fuxing Road, Haidian District, Beijing, 100853, China
- Department of Emergency Medicine, The Second Hospital of Hebei Medical University, Shijiazhuang, 050004, China
| | - Min Wang
- Department of Critical Care Medicine, The First Medical Center, Chinese PLA General Hospital, 28 Fuxing Road, Haidian District, Beijing, 100853, China
- Medical School of Chinese PLA, Beijing, 100853, China
| | - Feihu Zhou
- Department of Critical Care Medicine, The First Medical Center, Chinese PLA General Hospital, 28 Fuxing Road, Haidian District, Beijing, 100853, China
- National Key Laboratory of Kidney Diseases, Beijing Key Laboratory of Kidney Disease Research, National Clinical Research Center for Kidney Diseases, Beijing, 100853, China
| | - Hanyu Zhu
- Medical School of Chinese PLA, Beijing, 100853, China.
- National Key Laboratory of Kidney Diseases, Beijing Key Laboratory of Kidney Disease Research, National Clinical Research Center for Kidney Diseases, Beijing, 100853, China.
- Department of Nephrology, The First Medical Center of Chinese PLA General Hospital, 28 Fuxing Road, Haidian District, Beijing, 100853, China.
| | - Hongjun Kang
- Department of Critical Care Medicine, The First Medical Center, Chinese PLA General Hospital, 28 Fuxing Road, Haidian District, Beijing, 100853, China.
- Medical School of Chinese PLA, Beijing, 100853, China.
- National Key Laboratory of Kidney Diseases, Beijing Key Laboratory of Kidney Disease Research, National Clinical Research Center for Kidney Diseases, Beijing, 100853, China.
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25
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Nagai H, Adachi Y, Nakasugi T, Takigawa E, Ui J, Makino T, Miura M, Nakajima YI. Highly regenerative species-specific genes improve age-associated features in the adult Drosophila midgut. BMC Biol 2024; 22:157. [PMID: 39090637 PMCID: PMC11295675 DOI: 10.1186/s12915-024-01956-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Accepted: 07/09/2024] [Indexed: 08/04/2024] Open
Abstract
BACKGROUND The remarkable regenerative abilities observed in planarians and cnidarians are closely linked to the active proliferation of adult stem cells and the precise differentiation of their progeny, both of which typically deteriorate during aging in low regenerative animals. While regeneration-specific genes conserved in highly regenerative organisms may confer regenerative abilities and long-term maintenance of tissue homeostasis, it remains unclear whether introducing these regenerative genes into low regenerative animals can improve their regeneration and aging processes. RESULTS Here, we ectopically express highly regenerative species-specific JmjC domain-encoding genes (HRJDs) in Drosophila, a widely used low regenerative model organism. Surprisingly, HRJD expression impedes tissue regeneration in the developing wing disc but extends organismal lifespan when expressed in the intestinal stem cell lineages of the adult midgut under non-regenerative conditions. Notably, HRJDs enhance the proliferative activity of intestinal stem cells while maintaining their differentiation fidelity, ameliorating age-related decline in gut barrier functions. CONCLUSIONS These findings together suggest that the introduction of highly regenerative species-specific genes can improve stem cell functions and promote a healthy lifespan when expressed in aging animals.
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Affiliation(s)
- Hiroki Nagai
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo, 113-0033, Japan
- Institute of Science and Technology Austria, Am Campus 1, 3400, Klosterneuburg, Austria
| | - Yuya Adachi
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo, 113-0033, Japan
| | - Tenki Nakasugi
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo, 113-0033, Japan
| | - Ema Takigawa
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo, 113-0033, Japan
| | - Junichiro Ui
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo, 113-0033, Japan
| | - Takashi Makino
- Graduate School of Life Sciences, Tohoku University, 6-3 Aramaki Aza Aoba, Aoba-Ku, Sendai, 980-8578, Japan
| | - Masayuki Miura
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo, 113-0033, Japan
| | - Yu-Ichiro Nakajima
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo, 113-0033, Japan.
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26
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Nayak RR, Orellana DA. The impact of the human gut microbiome on the treatment of autoimmune disease. Immunol Rev 2024; 325:107-130. [PMID: 38864582 PMCID: PMC11338731 DOI: 10.1111/imr.13358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2024]
Abstract
Autoimmune (or rheumatic) diseases are increasing in prevalence but selecting the best therapy for each patient proceeds in trial-and-error fashion. This strategy can lead to ineffective therapy resulting in irreversible damage and suffering; thus, there is a need to bring the promise of precision medicine to patients with autoimmune disease. While host factors partially determine the therapeutic response to immunosuppressive drugs, these are not routinely used to tailor therapy. Thus, non-host factors likely contribute. Here, we consider the impact of the human gut microbiome in the treatment of autoimmunity. We propose that the gut microbiome can be manipulated to improve therapy and to derive greater benefit from existing therapies. We focus on the mechanisms by which the human gut microbiome impacts treatment response, provide a framework to interrogate these mechanisms, review a case study of a widely-used anti-rheumatic drug, and discuss challenges with studying multiple complex systems: the microbiome, the human immune system, and autoimmune disease. We consider open questions that remain in the field and speculate on the future of drug-microbiome-autoimmune disease interactions. Finally, we present a blue-sky vision for how the microbiome can be used to bring the promise of precision medicine to patients with rheumatic disease.
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Affiliation(s)
- Renuka R Nayak
- Rheumatology Division, Department of Medicine, University of California, San Francisco, California, USA
- Veterans Affairs Medical Center, San Francisco, California, USA
| | - Diego A Orellana
- Rheumatology Division, Department of Medicine, University of California, San Francisco, California, USA
- Veterans Affairs Medical Center, San Francisco, California, USA
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27
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Caetano‐Silva ME, Shrestha A, Duff AF, Kontic D, Brewster PC, Kasperek MC, Lin C, Wainwright DA, Hernandez‐Saavedra D, Woods JA, Bailey MT, Buford TW, Allen JM. Aging amplifies a gut microbiota immunogenic signature linked to heightened inflammation. Aging Cell 2024; 23:e14190. [PMID: 38725282 PMCID: PMC11320341 DOI: 10.1111/acel.14190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2024] [Revised: 04/20/2024] [Accepted: 04/22/2024] [Indexed: 08/15/2024] Open
Abstract
Aging is associated with low-grade inflammation that increases the risk of infection and disease, yet the underlying mechanisms remain unclear. Gut microbiota composition shifts with age, harboring microbes with varied immunogenic capacities. We hypothesized the gut microbiota acts as an active driver of low-grade inflammation during aging. Microbiome patterns in aged mice strongly associated with signs of bacterial-induced barrier disruption and immune infiltration, including marked increased levels of circulating lipopolysaccharide (LPS)-binding protein (LBP) and colonic calprotectin. Ex vivo immunogenicity assays revealed that both colonic contents and mucosa of aged mice harbored increased capacity to activate toll-like receptor 4 (TLR4) whereas TLR5 signaling was unchanged. We found patterns of elevated innate inflammatory signaling (colonic Il6, Tnf, and Tlr4) and endotoxemia (circulating LBP) in young germ-free mice after 4 weeks of colonization with intestinal contents from aged mice compared with young counterparts, thus providing a direct link between aging-induced shifts in microbiota immunogenicity and host inflammation. Additionally, we discovered that the gut microbiota of aged mice exhibited unique responses to a broad-spectrum antibiotic challenge (Abx), with sustained elevation in Escherichia (Proteobacteria) and altered TLR5 immunogenicity 7 days post-Abx cessation. Together, these data indicate that old age results in a gut microbiota that differentially acts on TLR signaling pathways of the innate immune system. We found that these age-associated microbiota immunogenic signatures are less resilient to challenge and strongly linked to host inflammatory status. Gut microbiota immunogenic signatures should be thus considered as critical factors in mediating chronic inflammatory diseases disproportionally impacting older populations.
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Affiliation(s)
- Maria Elisa Caetano‐Silva
- Department of Health and KinesiologyUniversity of Illinois at Urbana‐ChampaignUrbanaIllinoisUSA
- Division of Nutritional SciencesUniversity of Illinois at Urbana ChampaignUrbanaIllinoisUSA
| | - Akriti Shrestha
- Division of Nutritional SciencesUniversity of Illinois at Urbana ChampaignUrbanaIllinoisUSA
| | - Audrey F. Duff
- Center for Microbial PathogenesisNationwide Children's HospitalColumbusOhioUSA
| | - Danica Kontic
- Center for Microbial PathogenesisNationwide Children's HospitalColumbusOhioUSA
| | - Patricia C. Brewster
- Department of Health and KinesiologyUniversity of Illinois at Urbana‐ChampaignUrbanaIllinoisUSA
| | - Mikaela C. Kasperek
- Division of Nutritional SciencesUniversity of Illinois at Urbana ChampaignUrbanaIllinoisUSA
| | - Chia‐Hao Lin
- Department of Health and KinesiologyUniversity of Illinois at Urbana‐ChampaignUrbanaIllinoisUSA
| | - Derek A. Wainwright
- Departments of Cancer Biology and Neurological SurgeryLoyola University Chicago, Stritch School of MedicineMaywoodIllinoisUSA
| | - Diego Hernandez‐Saavedra
- Department of Health and KinesiologyUniversity of Illinois at Urbana‐ChampaignUrbanaIllinoisUSA
- Division of Nutritional SciencesUniversity of Illinois at Urbana ChampaignUrbanaIllinoisUSA
| | - Jeffrey A. Woods
- Department of Health and KinesiologyUniversity of Illinois at Urbana‐ChampaignUrbanaIllinoisUSA
- Division of Nutritional SciencesUniversity of Illinois at Urbana ChampaignUrbanaIllinoisUSA
| | - Michael T. Bailey
- Center for Microbial PathogenesisNationwide Children's HospitalColumbusOhioUSA
| | - Thomas W. Buford
- Division of Gerontology, Geriatrics and Palliative Care, Department of MedicineUniversity of Alabama at BirminghamBirminghamAlabamaUSA
- Birmingham/Atlanta VA GRECCBirmingham VA Medical CenterBirminghamAlabamaUSA
| | - Jacob M. Allen
- Department of Health and KinesiologyUniversity of Illinois at Urbana‐ChampaignUrbanaIllinoisUSA
- Division of Nutritional SciencesUniversity of Illinois at Urbana ChampaignUrbanaIllinoisUSA
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You M, Chen N, Yang Y, Cheng L, He H, Cai Y, Liu Y, Liu H, Hong G. The gut microbiota-brain axis in neurological disorders. MedComm (Beijing) 2024; 5:e656. [PMID: 39036341 PMCID: PMC11260174 DOI: 10.1002/mco2.656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 06/15/2024] [Accepted: 06/17/2024] [Indexed: 07/23/2024] Open
Abstract
Previous studies have shown a bidirectional communication between human gut microbiota and the brain, known as the microbiota-gut-brain axis (MGBA). The MGBA influences the host's nervous system development, emotional regulation, and cognitive function through neurotransmitters, immune modulation, and metabolic pathways. Factors like diet, lifestyle, genetics, and environment shape the gut microbiota composition together. Most research have explored how gut microbiota regulates host physiology and its potential in preventing and treating neurological disorders. However, the individual heterogeneity of gut microbiota, strains playing a dominant role in neurological diseases, and the interactions of these microbial metabolites with the central/peripheral nervous systems still need exploration. This review summarizes the potential role of gut microbiota in driving neurodevelopmental disorders (autism spectrum disorder and attention deficit/hyperactivity disorder), neurodegenerative diseases (Alzheimer's and Parkinson's disease), and mood disorders (anxiety and depression) in recent years and discusses the current clinical and preclinical gut microbe-based interventions, including dietary intervention, probiotics, prebiotics, and fecal microbiota transplantation. It also puts forward the current insufficient research on gut microbiota in neurological disorders and provides a framework for further research on neurological disorders.
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Affiliation(s)
- Mingming You
- Xiamen Key Laboratory of Genetic TestingThe Department of Laboratory MedicineThe First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen UniversityXiamenChina
| | - Nan Chen
- Master of Public HealthSchool of Public HealthXiamen UniversityXiamenChina
| | - Yuanyuan Yang
- Xiamen Key Laboratory of Genetic TestingThe Department of Laboratory MedicineThe First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen UniversityXiamenChina
| | - Lingjun Cheng
- Xiamen Key Laboratory of Genetic TestingThe Department of Laboratory MedicineThe First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen UniversityXiamenChina
| | - Hongzhang He
- Xiamen Key Laboratory of Genetic TestingThe Department of Laboratory MedicineThe First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen UniversityXiamenChina
| | - Yanhua Cai
- Master of Public HealthSchool of Public HealthXiamen UniversityXiamenChina
| | - Yating Liu
- Xiamen Key Laboratory of Genetic TestingThe Department of Laboratory MedicineThe First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen UniversityXiamenChina
| | - Haiyue Liu
- Xiamen Key Laboratory of Genetic TestingThe Department of Laboratory MedicineThe First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen UniversityXiamenChina
| | - Guolin Hong
- Xiamen Key Laboratory of Genetic TestingThe Department of Laboratory MedicineThe First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen UniversityXiamenChina
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Caldarelli M, Rio P, Marrone A, Giambra V, Gasbarrini A, Gambassi G, Cianci R. Inflammaging: The Next Challenge-Exploring the Role of Gut Microbiota, Environmental Factors, and Sex Differences. Biomedicines 2024; 12:1716. [PMID: 39200181 PMCID: PMC11351301 DOI: 10.3390/biomedicines12081716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2024] [Revised: 07/28/2024] [Accepted: 07/30/2024] [Indexed: 09/02/2024] Open
Abstract
The term 'inflammaging' has been coined to describe the chronic state of inflammation derived from ongoing cycles of tissue damage and the subsequent immune responses. This inflammatory status contributes to the decline of organs and physiological functions, accelerates the aging process, and increases the risk of age-related illnesses and death. During aging, the gut microbiota (GM) undergoes significant changes, including a decreased diversity of species, a decline in beneficial bacteria, and a rise in proinflammatory ones, resulting in persistent low-grade inflammation. Moreover, environmental factors, such as diet and medications, contribute to age-related changes in GM and immune function, preventing or promoting inflammaging. This narrative review aims to clarify the underlying mechanisms of inflammaging and to specifically investigate the influence of GM and several environmental factors on these mechanisms, while also exploring potential differences related to sex. Moreover, lifestyle and pharmacological interventions will be suggested to promote healthy aging.
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Affiliation(s)
- Mario Caldarelli
- Department of Translational Medicine and Surgery, Catholic University of Sacred Heart, 00168 Rome, Italy; (M.C.); (P.R.); (A.M.); (A.G.); (G.G.)
- Fondazione Policlinico Universitario A. Gemelli, Istituto di Ricerca e Cura a Carattere Scientifico (IRCCS), 00168 Rome, Italy
| | - Pierluigi Rio
- Department of Translational Medicine and Surgery, Catholic University of Sacred Heart, 00168 Rome, Italy; (M.C.); (P.R.); (A.M.); (A.G.); (G.G.)
- Fondazione Policlinico Universitario A. Gemelli, Istituto di Ricerca e Cura a Carattere Scientifico (IRCCS), 00168 Rome, Italy
| | - Andrea Marrone
- Department of Translational Medicine and Surgery, Catholic University of Sacred Heart, 00168 Rome, Italy; (M.C.); (P.R.); (A.M.); (A.G.); (G.G.)
- Fondazione Policlinico Universitario A. Gemelli, Istituto di Ricerca e Cura a Carattere Scientifico (IRCCS), 00168 Rome, Italy
| | - Vincenzo Giambra
- Institute for Stem Cell Biology, Regenerative Medicine and Innovative Therapies (ISBReMIT), Fondazione IRCCS “Casa Sollievo della Sofferenza”, 71013 San Giovanni Rotondo, Italy;
| | - Antonio Gasbarrini
- Department of Translational Medicine and Surgery, Catholic University of Sacred Heart, 00168 Rome, Italy; (M.C.); (P.R.); (A.M.); (A.G.); (G.G.)
- Fondazione Policlinico Universitario A. Gemelli, Istituto di Ricerca e Cura a Carattere Scientifico (IRCCS), 00168 Rome, Italy
| | - Giovanni Gambassi
- Department of Translational Medicine and Surgery, Catholic University of Sacred Heart, 00168 Rome, Italy; (M.C.); (P.R.); (A.M.); (A.G.); (G.G.)
- Fondazione Policlinico Universitario A. Gemelli, Istituto di Ricerca e Cura a Carattere Scientifico (IRCCS), 00168 Rome, Italy
| | - Rossella Cianci
- Department of Translational Medicine and Surgery, Catholic University of Sacred Heart, 00168 Rome, Italy; (M.C.); (P.R.); (A.M.); (A.G.); (G.G.)
- Fondazione Policlinico Universitario A. Gemelli, Istituto di Ricerca e Cura a Carattere Scientifico (IRCCS), 00168 Rome, Italy
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30
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Kawamoto S, Hara E. Crosstalk between gut microbiota and cellular senescence: a vicious cycle leading to aging gut. Trends Cell Biol 2024; 34:626-635. [PMID: 38220548 DOI: 10.1016/j.tcb.2023.12.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 12/06/2023] [Accepted: 12/15/2023] [Indexed: 01/16/2024]
Abstract
Two phenomena, the accumulation of senescent cells and changes in the gut microbiota, are thought to contribute to the decline of biological functions and the development of diseases associated with aging. However, the relationship between these two phenomena and their effects on aging remains to be clarified. Recently, we have reported that gut bacteria induce cellular senescence in ileal germinal center (GC) B cells, resulting in decreased IgA production and diversity. This, in turn, leads to an imbalance in the gut microbiota. Thus, the crosstalk between the gut microbiota and cellular senescence via the host immune system may establish a vicious cycle and contribute to the disruption of gut homeostasis associated with aging.
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Affiliation(s)
- Shimpei Kawamoto
- Department of Molecular Microbiology, Research Institute for Microbial Diseases (RIMD), Osaka University, Suita 565-0871, Japan.
| | - Eiji Hara
- Department of Molecular Microbiology, Research Institute for Microbial Diseases (RIMD), Osaka University, Suita 565-0871, Japan; Immunology Frontier Research Center, Osaka University, Suita 565-0871, Japan; Center for Infectious Diseases Education and Research, Osaka University, Suita 565-0871, Japan
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31
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Xu J, Xu H, Yang F, Xie Y, Cai F, Mao S, Lu M, Zhuang H, Hua Z. Different depths of food restriction and high-fat diet refeeding in mice impact host obesity and metabolic phenotypes with correlative changes in the gut microbiota. MedComm (Beijing) 2024; 5:e641. [PMID: 39021516 PMCID: PMC11253304 DOI: 10.1002/mco2.641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Revised: 06/03/2024] [Accepted: 06/04/2024] [Indexed: 07/20/2024] Open
Abstract
Overweight and obesity affect almost 2 billion adults worldwide, and food restriction (FR) is commonly used to reduce body fat. Whether refeeding (Re) after FR at different ages and to different degrees leads to overweight and its possible mechanisms are uncertain. In this study, adult and young mice were both restricted to 15% and 40% of their casual food intake, and then were fed 60% high-fat chow (FR15%-Re, FR40%-Re), whereas the control groups(CON) consumed high-fat or normal food throughout, respectively. The results of the study suggest that mild FR-heavy feeding may lead to more significant abnormal fat accumulation, liver damage, and increased recruitment of intestinal inflammatory factors and immune cells in mice of different ages and involves multiple types of alterations in the gut microbiota. Further fecal transplantation experiments as well as serum and liver enzyme-linked immunosorbent assay experiments preliminarily suggest that the link between lipid metabolism and inflammatory responses and the gut microbiota may be related to the regulation of the gut and live by Lipopolysaccharides(LPS) and Peroxisome Proliferator-Activated Receptor-Alpha(PPAR-α). In addition, our study may also serve as a reference for studying obesity prevention and treatment programs at different ages.
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Affiliation(s)
- Jiaqi Xu
- The State Key Laboratory of Pharmaceutical Biotechnology and Department of Neurology of Nanjing Drum Tower HospitalSchool of Life Sciences and The Affiliated Hospital of Nanjing University Medical School, Nanjing UniversityNanjingChina
| | - Huangru Xu
- The State Key Laboratory of Pharmaceutical Biotechnology and Department of Neurology of Nanjing Drum Tower HospitalSchool of Life Sciences and The Affiliated Hospital of Nanjing University Medical School, Nanjing UniversityNanjingChina
| | - Feiyan Yang
- The State Key Laboratory of Pharmaceutical Biotechnology and Department of Neurology of Nanjing Drum Tower HospitalSchool of Life Sciences and The Affiliated Hospital of Nanjing University Medical School, Nanjing UniversityNanjingChina
| | - Yawen Xie
- The State Key Laboratory of Pharmaceutical Biotechnology and Department of Neurology of Nanjing Drum Tower HospitalSchool of Life Sciences and The Affiliated Hospital of Nanjing University Medical School, Nanjing UniversityNanjingChina
| | - Fangfang Cai
- The State Key Laboratory of Pharmaceutical Biotechnology and Department of Neurology of Nanjing Drum Tower HospitalSchool of Life Sciences and The Affiliated Hospital of Nanjing University Medical School, Nanjing UniversityNanjingChina
| | - Siyu Mao
- The State Key Laboratory of Pharmaceutical Biotechnology and Department of Neurology of Nanjing Drum Tower HospitalSchool of Life Sciences and The Affiliated Hospital of Nanjing University Medical School, Nanjing UniversityNanjingChina
| | - Min Lu
- The State Key Laboratory of Pharmaceutical Biotechnology and Department of Neurology of Nanjing Drum Tower HospitalSchool of Life Sciences and The Affiliated Hospital of Nanjing University Medical School, Nanjing UniversityNanjingChina
| | - Hongqin Zhuang
- The State Key Laboratory of Pharmaceutical Biotechnology and Department of Neurology of Nanjing Drum Tower HospitalSchool of Life Sciences and The Affiliated Hospital of Nanjing University Medical School, Nanjing UniversityNanjingChina
| | - Zi‐Chun Hua
- The State Key Laboratory of Pharmaceutical Biotechnology and Department of Neurology of Nanjing Drum Tower HospitalSchool of Life Sciences and The Affiliated Hospital of Nanjing University Medical School, Nanjing UniversityNanjingChina
- Faculty of Pharmaceutical SciencesXinxiang Medical UniversityXinxiangChina
- Changzhou High‐Tech Research Institute of Nanjing University and Jiangsu TargetPharma Laboratories Inc.ChangzhouChina
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32
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Hu Y, Aljumaah MR, Azcarate-Peril MA. Galacto-Oligosaccharides and the Elderly Gut: Implications for Immune Restoration and Health. Adv Nutr 2024; 15:100263. [PMID: 38897384 PMCID: PMC11292246 DOI: 10.1016/j.advnut.2024.100263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2024] [Revised: 04/23/2024] [Accepted: 06/13/2024] [Indexed: 06/21/2024] Open
Abstract
The increasing prevalence of noncommunicable diseases in the aging population has been correlated with a decline in innate and adaptive immune responses; hence, it is imperative to identify approaches to improve immune function, prevent related disorders, and reduce or treat age-associated health complications. Prebiotic supplementation is a promising approach to modulate the gut microbiome and immune system, offering a potential strategy to maintain the integrity of immune function in older individuals. This review summarizes the current research on prebiotic galacto-oligosaccharide (GOS) immunomodulatory mechanisms mediated by bacterial-derived metabolites, including short-chain fatty acids and secondary bile acids, to maintain immune homeostasis. The potential applications of GOS as immunotherapy for age-related disease prevention in older individuals are also highlighted. This aligns with the global shift toward proactive healthcare and emphasizes the significance of early intervention in directing an individual's health trajectory.
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Affiliation(s)
- Yunan Hu
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, United States; UNC Microbiome Core, Center for Gastrointestinal Biology and Disease (CGIBD), School of Medicine, University of North Carolina, Chapel Hill, NC, United States
| | - Mashael R Aljumaah
- UNC Microbiome Core, Center for Gastrointestinal Biology and Disease (CGIBD), School of Medicine, University of North Carolina, Chapel Hill, NC, United States; Department of Plant and Microbial Biology, North Carolina State University, Raleigh, NC, United States; Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Maria Andrea Azcarate-Peril
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, United States; UNC Microbiome Core, Center for Gastrointestinal Biology and Disease (CGIBD), School of Medicine, University of North Carolina, Chapel Hill, NC, United States.
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33
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Fettig NM, Pu A, Osborne LC, Gommerman JL. The influence of aging and the microbiome in multiple sclerosis and other neurologic diseases. Immunol Rev 2024; 325:166-189. [PMID: 38890777 DOI: 10.1111/imr.13361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/20/2024]
Abstract
The human gut microbiome is well-recognized as a key player in maintaining health. However, it is a dynamic entity that changes across the lifespan. How the microbial changes that occur in later decades of life shape host health or impact age-associated inflammatory neurological diseases such as multiple sclerosis (MS) is still unclear. Current understanding of the aging gut microbiome is largely limited to cross-sectional observational studies. Moreover, studies in humans are limited by confounding host-intrinsic and extrinsic factors that are not easily disentangled from aging. This review provides a comprehensive summary of existing literature on the aging gut microbiome and its known relationships with neurological diseases, with a specific focus on MS. We will also discuss preclinical animal models and human studies that shed light on the complex microbiota-host interactions that have the potential to influence disease pathology and progression in aging individuals. Lastly, we propose potential avenues of investigation to deconvolute features of an aging microbiota that contribute to disease, or alternatively promote health in advanced age.
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Affiliation(s)
- Naomi M Fettig
- Department of Microbiology & Immunology, Life Sciences Institute, University of British Columbia, Vancouver, BC, Canada
| | - Annie Pu
- Department of Immunology, University of Toronto, Toronto, ON, Canada
| | - Lisa C Osborne
- Department of Microbiology & Immunology, Life Sciences Institute, University of British Columbia, Vancouver, BC, Canada
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34
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Ullah H, Arbab S, Tian Y, Chen Y, Liu CQ, Li Q, Li K. Crosstalk between gut microbiota and host immune system and its response to traumatic injury. Front Immunol 2024; 15:1413485. [PMID: 39144142 PMCID: PMC11321976 DOI: 10.3389/fimmu.2024.1413485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2024] [Accepted: 06/04/2024] [Indexed: 08/16/2024] Open
Abstract
Millions of microorganisms make up the complex microbial ecosystem found in the human gut. The immune system's interaction with the gut microbiota is essential for preventing inflammation and maintaining intestinal homeostasis. Numerous metabolic products that can cross-talk between immune cells and the gut epithelium are metabolized by the gut microbiota. Traumatic injury elicits a great and multifaceted immune response in the minutes after the initial offense, containing simultaneous pro- and anti-inflammatory responses. The development of innovative therapies that improve patient outcomes depends on the gut microbiota and immunological responses to trauma. The altered makeup of gut microbes, or gut dysbiosis, can also dysregulate immunological responses, resulting in inflammation. Major human diseases may become more common as a result of chronic dysbiosis and the translocation of bacteria and the products of their metabolism beyond the mucosal barrier. In this review, we briefly summarize the interactions between the gut microbiota and the immune system and human disease and their therapeutic probiotic formulations. We also discuss the immune response to traumatic injury.
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Affiliation(s)
- Hanif Ullah
- Medicine and Engineering Interdisciplinary Research Laboratory of Nursing & Materials/Nursing Key Laboratory of Sichuan Province, West China Hospital, Sichuan University/West China School of Nursing, Sichuan University, Chengdu, Sichuan, China
| | - Safia Arbab
- Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Yali Tian
- Medicine and Engineering Interdisciplinary Research Laboratory of Nursing & Materials/Nursing Key Laboratory of Sichuan Province, West China Hospital, Sichuan University/West China School of Nursing, Sichuan University, Chengdu, Sichuan, China
| | - Yuwen Chen
- Medicine and Engineering Interdisciplinary Research Laboratory of Nursing & Materials/Nursing Key Laboratory of Sichuan Province, West China Hospital, Sichuan University/West China School of Nursing, Sichuan University, Chengdu, Sichuan, China
| | - Chang-qing Liu
- Medicine and Engineering Interdisciplinary Research Laboratory of Nursing & Materials/Nursing Key Laboratory of Sichuan Province, West China Hospital, Sichuan University/West China School of Nursing, Sichuan University, Chengdu, Sichuan, China
| | - Qijie Li
- Medicine and Engineering Interdisciplinary Research Laboratory of Nursing & Materials/Nursing Key Laboratory of Sichuan Province, West China Hospital, Sichuan University/West China School of Nursing, Sichuan University, Chengdu, Sichuan, China
| | - Ka Li
- Medicine and Engineering Interdisciplinary Research Laboratory of Nursing & Materials/Nursing Key Laboratory of Sichuan Province, West China Hospital, Sichuan University/West China School of Nursing, Sichuan University, Chengdu, Sichuan, China
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35
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Morys J, Małecki A, Nowacka-Chmielewska M. Stress and the gut-brain axis: an inflammatory perspective. Front Mol Neurosci 2024; 17:1415567. [PMID: 39092201 PMCID: PMC11292226 DOI: 10.3389/fnmol.2024.1415567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2024] [Accepted: 06/24/2024] [Indexed: 08/04/2024] Open
Abstract
The gut-brain axis (GBA) plays a dominant role in maintaining homeostasis as well as contributes to mental health maintenance. The pathways that underpin the axis expand from macroscopic interactions with the nervous system, to the molecular signals that include microbial metabolites, tight junction protein expression, or cytokines released during inflammation. The dysfunctional GBA has been repeatedly linked to the occurrence of anxiety- and depressive-like behaviors development. The importance of the inflammatory aspects of the altered GBA has recently been highlighted in the literature. Here we summarize current reports on GBA signaling which involves the immune response within the intestinal and blood-brain barrier (BBB). We also emphasize the effect of stress response on altering barriers' permeability, and the therapeutic potential of microbiota restoration by probiotic administration or microbiota transplantation, based on the latest animal studies. Most research performed on various stress models showed an association between anxiety- and depressive-like behaviors, dysbiosis of gut microbiota, and disruption of intestinal permeability with simultaneous changes in BBB integrity. It could be postulated that under stress conditions impaired communication across BBB may therefore represent a significant mechanism allowing the gut microbiota to affect brain functions.
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Affiliation(s)
| | | | - Marta Nowacka-Chmielewska
- Laboratory of Molecular Biology, Institute of Physiotherapy and Health Sciences, Academy of Physical Education, Katowice, Poland
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36
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Patterson K, Fraser K, Bernstein D, Bermingham EN, Weidgraaf K, Kate Shoveller A, Thomas D. Development and validation of an LC-MS/MS method for the quantification of oral-sugar probes in plasma to test small intestinal permeability and absorptive capacity in the domestic cat (Felis catus). J Chromatogr B Analyt Technol Biomed Life Sci 2024; 1242:124216. [PMID: 38917651 DOI: 10.1016/j.jchromb.2024.124216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2024] [Revised: 06/19/2024] [Accepted: 06/21/2024] [Indexed: 06/27/2024]
Abstract
A novel method for quantifying the concentration of lactulose, rhamnose, xylose, and 3-O-methylglucose (3-OMG) in cat plasma using liquid chromatography-mass spectrometry (LC-MS) was developed. Domestic male cats (n = 13) were orally dosed with a solution containing the four sugars to test the permeability and absorptive capacity of their intestinal barrier. Plasma samples were taken 3 h later and were prepared with acetonitrile (ACN), dried under N2, and reconstituted in 90 % ACN with 1 mM ammonium formate. Stable isotope labelled 13C standards for each analyte were used as internal standards. Chromatographic separation was conducted using a Phenomenex Luna NH2 column with a gradient elution system of deionized water and 90 % ACN with 1 mM ammonium formate at 300 µL/min for 13 min total analysis time. Recovery trials were conducted in triplicate over three days with RSD values (%) for each day ranging from 1.2 to 1.4 for lactulose, 5.4 - 6.0 for rhamnose, 3.3 - 5.5 for xylose, and 2.6 - 5.6 for 3-OMG. Inter-day variations for each analyte were not different (p > 0.05). Limit of detection and quantification were 0.2 and 0.7 µg/mL for lactulose, 0.8 and 2.4 µg/mL for rhamnose, 0.6 and 1.8 µg/mL for xylose, and 0.3 and 1.1 µg/mL for 3-OMG, respectively. Plasma sugar concentrations recovered from cats were above the limit of quantification and below the highest calibration standard, validating the use of this method to test intestinal permeability and absorptive capacity in cats.
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Affiliation(s)
- Keely Patterson
- School of Agriculture and Environment, Massey University, Palmerston North 4442, New Zealand; AgResearch, Private Bag 11008, Palmerston North 4442, New Zealand.
| | - Karl Fraser
- AgResearch, Private Bag 11008, Palmerston North 4442, New Zealand; Riddet Institute, Palmerston North 4442, New Zealand.
| | - Daniel Bernstein
- AgResearch, Private Bag 11008, Palmerston North 4442, New Zealand.
| | - Emma N Bermingham
- Fonterra, Dairy Farm Road, Fitzherbert, Palmerston North 4472, New Zealand.
| | - Karin Weidgraaf
- Centre for Feline Nutrition, Massey University, Palmerston North, New Zealand.
| | - Anna Kate Shoveller
- Department of Animal Biosciences, University of Guelph, Guelph N1G 2W1, Canada.
| | - David Thomas
- School of Agriculture and Environment, Massey University, Palmerston North 4442, New Zealand; Centre for Feline Nutrition, Massey University, Palmerston North, New Zealand.
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Zhang W, Zhong Y, Wang Z, Tang F, Zheng C. Apple polysaccharide improves age-matched cognitive impairment and intestinal aging through microbiota-gut-brain axis. Sci Rep 2024; 14:16215. [PMID: 39003416 PMCID: PMC11246462 DOI: 10.1038/s41598-024-67132-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2024] [Accepted: 07/08/2024] [Indexed: 07/15/2024] Open
Abstract
The Apple polysaccharides (AP), extracted from the fruit of apple, has been used to treat multiple pathological diseases. In this study, we evaluated the effects of AP on cognitive impairment and intestinal aging in naturally aging mice. As a result, it was found that AP could improve spatial learning and memory impairment in aging mice through the Morris water maze experiment. Additionally, AP intervention can upregulate the expression of nerve growth factor (BDNF), postsynaptic marker (PSD95), and presynaptic marker (SYP) proteins. Moreover, AP can enhance total antioxidant capacity, reduce the level of pro-inflammatory cytokine, and inhibit the activation of the NF-κB signaling pathway, exerting anti-inflammatory and antioxidant functions. And the administration of AP restored intestinal mucosal barrier function, reduced the expression of aging and apoptosis related proteins. The administration of AP also altered the gut microbiota of mice. At the genus level, AP decreased the abundance of Helicobacter and Bilophila, while increased the abundance of Lactobacillus and Bacteroides. In summary, these data demonstrate that AP treatment can alleviate cognitive impairment, oxidative stress, and inflammatory reactions, repair the intestinal mucosal barrier, reduce intestinal aging, and alter specific microbial characteristics, ultimately improving the health of the elderly.
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Affiliation(s)
- Wenming Zhang
- Department of Hepatobiliary Surgery, The Second Affiliated Hospital of Nanchang University, 330000, Nanchang, Jiangxi, People's Republic of China
- The Institute of Translational Medicine, the Second Affiliated Hospital of Nanchang University, Nanchang University, 1 Minde Road, Nanchang, 330006, Jiangxi, People's Republic of China
| | - Yuchun Zhong
- Department of Hepatobiliary Surgery, The Second Affiliated Hospital of Nanchang University, 330000, Nanchang, Jiangxi, People's Republic of China
- The Institute of Translational Medicine, the Second Affiliated Hospital of Nanchang University, Nanchang University, 1 Minde Road, Nanchang, 330006, Jiangxi, People's Republic of China
| | - Zhuoya Wang
- Department of Rehabilitation Medicine, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, People's Republic of China
- The Institute of Translational Medicine, the Second Affiliated Hospital of Nanchang University, Nanchang University, 1 Minde Road, Nanchang, 330006, Jiangxi, People's Republic of China
| | - Furui Tang
- Department of Rehabilitation Medicine, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, People's Republic of China
- The Institute of Translational Medicine, the Second Affiliated Hospital of Nanchang University, Nanchang University, 1 Minde Road, Nanchang, 330006, Jiangxi, People's Republic of China
| | - Cihua Zheng
- Department of Hepatobiliary Surgery, The Second Affiliated Hospital of Nanchang University, 330000, Nanchang, Jiangxi, People's Republic of China.
- Department of Rehabilitation Medicine, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, People's Republic of China.
- The Institute of Translational Medicine, the Second Affiliated Hospital of Nanchang University, Nanchang University, 1 Minde Road, Nanchang, 330006, Jiangxi, People's Republic of China.
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Krilis M, Fry L, Ngo P, Goldberg I. The gut microbiome and primary open angle glaucoma: Evidence for a 'gut-glaucoma' axis? Eur J Ophthalmol 2024; 34:924-930. [PMID: 38086752 DOI: 10.1177/11206721231219147] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/02/2024]
Abstract
Glaucoma presents an epidemiological burden as the leading cause of irreversible blindness globally and the most common cause of preventable blindness. While elevated intraocular pressure is the strongest modifiable risk factor, the exact mechanisms of retinal ganglion cell damage leading to progressive vision loss are not entirely understood. Studies of other neurodegenerative diseases show a potential for human gut microbiome dysbiosis to play a pathogenic role. An investigation into whether the microbiome, a potential modifiable risk factor, has significance in glaucoma enables exploration of prophylactic or additive treatments. Elevated population levels of specific bacterial species have been noted in glaucoma patients, particularly Prevotellaceae, Enterobacteriaceae and Escherichia coli, while Megomonas is speculated to be protective. Evidence also points to systemic neuro-inflammation and disruption of autoimmune processes as a result of imbalances in both human and animal models, where heat shock proteins may contribute to pathogenesis. Further research into the influence of gut microbiome on pathogenesis offers a chance to minimise irreversible vision loss in glaucoma.
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Affiliation(s)
- Matthew Krilis
- Oxford Eye Hospital, Oxford, UK
- Save Sight Institute, Sydney, Australia
| | - Lewis Fry
- Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, UK
| | - Patrick Ngo
- School of Medicine, University of Sydney, Camperdown, Australia
| | - Ivan Goldberg
- Discipline of Ophthalmology, University of Sydney, Sydney, Australia
- Glaucoma Unit, Sydney Eye Hospital, Sydney, Australia
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Thorp EB, Filipp M, Dima M, Tan C, Feinstein M, Popko B, DeBerge M. CCR2 + monocytes promote white matter injury and cognitive dysfunction after myocardial infarction. Brain Behav Immun 2024; 119:818-835. [PMID: 38735403 DOI: 10.1016/j.bbi.2024.05.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Revised: 04/17/2024] [Accepted: 05/02/2024] [Indexed: 05/14/2024] Open
Abstract
Survivors of myocardial infarction are at increased risk for vascular dementia. Neuroinflammation has been implicated in the pathogenesis of vascular dementia, yet little is known about the cellular and molecular mediators of neuroinflammation after myocardial infarction. Using a mouse model of myocardial infarction coupled with flow cytometric analyses and immunohistochemistry, we discovered increased monocyte abundance in the brain after myocardial infarction, which was associated with increases in brain-resident perivascular macrophages and microglia. Myeloid cell recruitment and activation was also observed in post-mortem brains of humans that died after myocardial infarction. Spatial and single cell transcriptomic profiling of brain-resident myeloid cells after experimental myocardial infarction revealed increased expression of monocyte chemoattractant proteins. In parallel, myocardial infarction increased crosstalk between brain-resident myeloid cells and oligodendrocytes, leading to neuroinflammation, white matter injury, and cognitive dysfunction. Inhibition of monocyte recruitment preserved white matter integrity and cognitive function, linking monocytes to neurodegeneration after myocardial infarction. Together, these preclinical and clinical results demonstrate that monocyte infiltration into the brain after myocardial infarction initiate neuropathological events that lead to vascular dementia.
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Affiliation(s)
- Edward B Thorp
- Department of Pathology, Northwestern University, Chicago, IL, United States.
| | - Mallory Filipp
- Department of Pathology, Northwestern University, Chicago, IL, United States
| | - Maria Dima
- Department of Neurology, Division of Multiple Sclerosis and Neuroimmunology, Northwestern University, Chicago, IL, United States
| | - Chunfeng Tan
- Department of Neurology, The University of Texas Health Science Center at Houston, Houston, TX, United States
| | - Matthew Feinstein
- Department of Pathology, Northwestern University, Chicago, IL, United States; Department of Medicine, Division of Cardiology, Northwestern University, Chicago, IL, United States
| | - Brian Popko
- Department of Neurology, Division of Multiple Sclerosis and Neuroimmunology, Northwestern University, Chicago, IL, United States
| | - Matthew DeBerge
- Department of Pathology, Northwestern University, Chicago, IL, United States; Department of Anesthesiology, Critical Care and Pain Medicine, The University of Texas Health Science Center at Houston, Houston, TX, United States.
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Yokomizo T, Oshima M, Iwama A. Epigenetics of hematopoietic stem cell aging. Curr Opin Hematol 2024; 31:207-216. [PMID: 38640057 DOI: 10.1097/moh.0000000000000818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/21/2024]
Abstract
PURPOSE OF REVIEW The development of new antiaging medicines is of great interest to the current elderly and aging population. Aging of the hematopoietic system is attributed to the aging of hematopoietic stem cells (HSCs), and epigenetic alterations are the key effectors driving HSC aging. Understanding the epigenetics of HSC aging holds promise of providing new insights for combating HSC aging and age-related hematological malignancies. RECENT FINDINGS Aging is characterized by the progressive loss of physiological integrity, leading to impaired function and increased vulnerability to death. During aging, the HSCs undergo both quantitative and qualitative changes. These functional changes in HSCs cause dysregulated hematopoiesis, resulting in anemia, immune dysfunction, and an increased risk of hematological malignancies. Various cell-intrinsic and cell-extrinsic effectors influencing HSC aging have also been identified. Epigenetic alterations are one such mechanism. SUMMARY Cumulative epigenetic alterations in aged HSCs affect their fate, leading to aberrant self-renewal, differentiation, and function of aged HSCs. In turn, these factors provide an opportunity for aged HSCs to expand by modulating their self-renewal and differentiation balance, thereby contributing to the development of hematological malignancies.
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Affiliation(s)
- Takako Yokomizo
- Division of Stem Cell and Molecular Medicine, Center for Stem Cell Biology and Regenerative Medicine, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
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Wells C, Robertson T, Sheth P, Abraham S. How aging influences the gut-bone marrow axis and alters hematopoietic stem cell regulation. Heliyon 2024; 10:e32831. [PMID: 38984298 PMCID: PMC11231543 DOI: 10.1016/j.heliyon.2024.e32831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2024] [Revised: 06/03/2024] [Accepted: 06/10/2024] [Indexed: 07/11/2024] Open
Abstract
The gut microbiome has come to prominence across research disciplines, due to its influence on major biological systems within humans. Recently, a relationship between the gut microbiome and hematopoietic system has been identified and coined the gut-bone marrow axis. It is well established that the hematopoietic system and gut microbiome separately alter with age; however, the relationship between these changes and how these systems influence each other demands investigation. Since the hematopoietic system produces immune cells that help govern commensal bacteria, it is important to identify how the microbiome interacts with hematopoietic stem cells (HSCs). The gut microbiota has been shown to influence the development and outcomes of hematologic disorders, suggesting dysbiosis may influence the maintenance of HSCs with age. Short chain fatty acids (SCFAs), lactate, iron availability, tryptophan metabolites, bacterial extracellular vesicles, microbe associated molecular patterns (MAMPs), and toll-like receptor (TLR) signalling have been proposed as key mediators of communication across the gut-bone marrow axis and will be reviewed in this article within the context of aging.
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Affiliation(s)
- Christopher Wells
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, Ontario, Canada
| | - Tristan Robertson
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, Ontario, Canada
| | - Prameet Sheth
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, Ontario, Canada
- Division of Microbiology, Queen's University, Kingston, Ontario, Canada
- Department of Pathology and Molecular Medicine, Kingston, Ontario, Canada
| | - Sheela Abraham
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, Ontario, Canada
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Song Q, Zhu Y, Liu X, Liu H, Zhao X, Xue L, Yang S, Wang Y, Liu X. Changes in the gut microbiota of patients with sarcopenia based on 16S rRNA gene sequencing: a systematic review and meta-analysis. Front Nutr 2024; 11:1429242. [PMID: 39006102 PMCID: PMC11239431 DOI: 10.3389/fnut.2024.1429242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2024] [Accepted: 06/17/2024] [Indexed: 07/16/2024] Open
Abstract
Introduction Sarcopenia, an age-related disease, has become a major public health concern, threatening muscle health and daily functioning in older adults around the world. Changes in the gut microbiota can affect skeletal muscle metabolism, but the exact association is unclear. The richness of gut microbiota refers to the number of different species in a sample, while diversity not only considers the number of species but also the evenness of their abundances. Alpha diversity is a comprehensive metric that measures both the number of different species (richness) and the evenness of their abundances, thereby providing a thorough understanding of the species composition and structure of a community. Methods This meta-analysis explored the differences in intestinal microbiota diversity and richness between populations with sarcopenia and non-sarcopenia based on 16 s rRNA gene sequencing and identified new targets for the prevention and treatment of sarcopenia. PubMed, Embase, Web of Science, and Google Scholar databases were searched for cross-sectional studies on the differences in gut microbiota between sarcopenia and non-sarcopenia published from 1995 to September 2023 scale and funnel plot analysis assessed the risk of bias, and performed a meta-analysis with State v.15. 1. Results A total of 17 randomized controlled studies were included, involving 4,307 participants aged 43 to 87 years. The alpha diversity of intestinal flora in the sarcopenia group was significantly reduced compared to the non-sarcopenia group: At the richness level, the proportion of Actinobacteria and Fusobacteria decreased, although there was no significant change in other phyla. At the genus level, the abundance of f-Ruminococcaceae; g-Faecalibacterium, g-Prevotella, Lachnoclostridium, and other genera decreased, whereas the abundance of g-Bacteroides, Parabacteroides, and Shigella increased. Discussion This study showed that the richness of the gut microbiota decreased with age in patients with sarcopenia. Furthermore, the relative abundance of different microbiota changed related to age, comorbidity, participation in protein metabolism, and other factors. This study provides new ideas for targeting the gut microbiota for the prevention and treatment of sarcopenia. Systematic Review Registration https://www.crd.york.ac.uk/PROSPERO/display_record.php?RecordID=475887, CRD475887.
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Affiliation(s)
- Qi Song
- Honghui Hospital, Xi'an Jiaotong University, Xi'an, China
- Xi'an Physical Education University, Xi'an, China
| | - Youkang Zhu
- Honghui Hospital, Xi'an Jiaotong University, Xi'an, China
- Xi'an Physical Education University, Xi'an, China
| | - Xiao Liu
- Honghui Hospital, Xi'an Jiaotong University, Xi'an, China
- Xi'an Physical Education University, Xi'an, China
| | - Hai Liu
- Honghui Hospital, Xi'an Jiaotong University, Xi'an, China
- Xi'an Physical Education University, Xi'an, China
| | | | - Liyun Xue
- Honghui Hospital, Xi'an Jiaotong University, Xi'an, China
- Xi'an Physical Education University, Xi'an, China
| | - Shaoying Yang
- Honghui Hospital, Xi'an Jiaotong University, Xi'an, China
- Xi'an Physical Education University, Xi'an, China
| | - Yujia Wang
- Honghui Hospital, Xi'an Jiaotong University, Xi'an, China
- Xi'an Physical Education University, Xi'an, China
| | - Xifang Liu
- Honghui Hospital, Xi'an Jiaotong University, Xi'an, China
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Shi YB, Dong HL, Chang WK, Zhao Y, Jin HJ, Li JK, Yan S. Genetic evidence for a causal link between gut microbiota and arterial embolism and thrombosis: a two-sample Mendelian randomization study. Front Microbiol 2024; 15:1396699. [PMID: 38957618 PMCID: PMC11217536 DOI: 10.3389/fmicb.2024.1396699] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2024] [Accepted: 05/28/2024] [Indexed: 07/04/2024] Open
Abstract
Background Previous research has hinted at a crucial link between gut microbiota and arterial embolism and thrombosis, yet the causal relationship remains enigmatic. To gain a deeper understanding, we aimed to comprehensively explore the causal relationship and elucidate the impact of the gut microbiota on the risk through a two-sample Mendelian randomization (MR) study. Methods Genetic instrumental variables for gut microbiota were identified from a genome-wide association study (GWAS) of 18,340 participants. Summary statistics for IBS were drawn from a GWAS including 1,076 cases and 381,997 controls. We used the inverse-variance weighted (IVW) method as the primary analysis. To test the robustness of our results, we further performed the weighted median method, MR-Egger regression, and MR pleiotropy residual sum and outlier test. Results We identified three bacterial traits that were associated with the risk of arterial embolism and thrombosis: odds ratio (OR): 1.58, 95% confidence interval (CI): 1.08-2.31, p = 0.017 for genus Catenibacterium; OR: 0.64, 95% CI: 0.42-0.96, p = 0.031 for genus Dialister; and OR: 2.08, 95% CI: 1.25-3.47, p = 0.005 for genus Odoribacter. The results of sensitivity analyses for these bacterial traits were consistent (P<0.05). Conclusion Our systematic analyses provided evidence to support a potential causal relationship between several gut microbiota taxa and the risk of arterial embolism and thrombosis. More studies are required to show how the gut microbiota affects the development of arterial embolism and thrombosis.
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Affiliation(s)
- Yong-Bin Shi
- Department of Vascular Surgery, Second Hospital of Shanxi Medical University, Taiyuan, China
| | - Hong-Lin Dong
- Department of Vascular Surgery, Second Hospital of Shanxi Medical University, Taiyuan, China
| | - Wen-Kai Chang
- Department of Vascular Surgery, Second Hospital of Shanxi Medical University, Taiyuan, China
| | - Yan Zhao
- Department of Vascular Surgery, Second Hospital of Shanxi Medical University, Taiyuan, China
| | - Hai-Jiang Jin
- Department of Vascular Surgery, Second Hospital of Shanxi Medical University, Taiyuan, China
| | - Jun-Kai Li
- Department of Vascular Surgery, First Hospital of Shanxi Medical University, Taiyuan, China
| | - Sheng Yan
- Department of Vascular Surgery, Second Hospital of Shanxi Medical University, Taiyuan, China
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Singh A, Schurman SH, Bektas A, Kaileh M, Roy R, Wilson DM, Sen R, Ferrucci L. Aging and Inflammation. Cold Spring Harb Perspect Med 2024; 14:a041197. [PMID: 38052484 PMCID: PMC11146314 DOI: 10.1101/cshperspect.a041197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2023]
Abstract
Aging can be conceptualized as the progressive disequilibrium between stochastic damage accumulation and resilience mechanisms that continuously repair that damage, which eventually cause the development of chronic disease, frailty, and death. The immune system is at the forefront of these resilience mechanisms. Indeed, aging is associated with persistent activation of the immune system, witnessed by a high circulating level of inflammatory markers and activation of immune cells in the circulation and in tissue, a condition called "inflammaging." Like aging, inflammaging is associated with increased risk of many age-related pathologies and disabilities, as well as frailty and death. Herein we discuss recent advances in the understanding of the mechanisms leading to inflammaging and the intrinsic dysregulation of the immune function that occurs with aging. We focus on the underlying mechanisms of chronic inflammation, in particular the role of NF-κB and recent studies targeting proinflammatory mediators. We further explore the dysregulation of the immune response with age and immunosenescence as an important mechanistic immune response to acute stressors. We examine the role of the gastrointestinal microbiome, age-related dysbiosis, and the integrated stress response in modulating the inflammatory "response" to damage accumulation and stress. We conclude by focusing on the seminal question of whether reducing inflammation is useful and the results of related clinical trials. In summary, we propose that inflammation may be viewed both as a clinical biomarker of the failure of resilience mechanisms and as a causal factor in the rising burden of disease and disabilities with aging. The fact that inflammation can be reduced through nonpharmacological interventions such as diet and exercise suggests that a life course approach based on education may be a successful strategy to increase the health span with few adverse consequences.
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Affiliation(s)
- Amit Singh
- Laboratory of Molecular Biology and Immunology, National Institute on Aging, Baltimore, Maryland 21224, USA
| | - Shepherd H Schurman
- Clinical Research Unit, National Institute on Aging, Baltimore, Maryland 21224, USA
| | - Arsun Bektas
- Translational Gerontology Branch, National Institute on Aging, Baltimore, Maryland 21224, USA
| | - Mary Kaileh
- Laboratory of Molecular Biology and Immunology, National Institute on Aging, Baltimore, Maryland 21224, USA
| | - Roshni Roy
- Laboratory of Molecular Biology and Immunology, National Institute on Aging, Baltimore, Maryland 21224, USA
| | - David M Wilson
- Biomedical Research Institute, Hasselt University, Diepenbeek 3500, Belgium
| | - Ranjan Sen
- Laboratory of Molecular Biology and Immunology, National Institute on Aging, Baltimore, Maryland 21224, USA
| | - Luigi Ferrucci
- Translational Gerontology Branch, National Institute on Aging, Baltimore, Maryland 21224, USA
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Woolbright BL, Xuan H, Ahmed I, Rajendran G, Abbott E, Dennis K, Zhong C, Umar S, Taylor JA. Aging induces changes in cancer formation and microbial content in a murine model of bladder cancer. GeroScience 2024; 46:3361-3375. [PMID: 38270807 PMCID: PMC11009212 DOI: 10.1007/s11357-024-01064-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Accepted: 12/19/2023] [Indexed: 01/26/2024] Open
Abstract
Bladder cancer (BCa) incidence is tightly linked to aging. Older patients with BCa present with higher grade tumors and have worse outcomes on Bacillus-Calmette-Guerin (BCG) immunotherapy. Aging is also known to result in changes in the gut microbiome over mammalian lifespan, with recent studies linking alterations in the gut microbiome to changes in tumor immunity. There is limited information on the microbiome in BCa models though, despite known links to aging and immunotherapy. The purpose of this study was to evaluate how aging impacts tumor formation, inflammation, and the microbiome of mice given the model BCa carcinogen N-butyl-N-(4-hydroxybutyl) nitrosamine (BBN). We hypothesized old animals would have larger, more inflamed tumors and a shift in their fecal microbiome compared to their younger counterparts. Young (~8-week-old) or old (~78-week-old) C57Bl/6J animals were administered 0.05% BBN in drinking water for 16 weeks and then euthanized or allowed to progress for an additional 4 weeks. After 16 weeks of BBN, old mice had higher bladder to body weight ratio than young mice, and also muscle invasive tumors, which were not seen in their young counterparts. Old animals also had increased innate immune recruitment, but CD4+/CD8+ T cell recruitment did not appear different. BBN dramatically altered the microbiome in both sets of animals as measured by ß-diversity, including changes in multiple genera of bacteria. These data suggest old mice have a differential response to BBN-induced BCa. Given the median age of patients with BCa, understanding how the aged phenotype interacts with BCa is imperative.
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Affiliation(s)
- Benjamin L Woolbright
- Department of Urology, University of Kansas Medical Center, 3901 Rainbow Blvd, MS 1018, Kansas City, KS, 66160, USA
- Department of Cancer Biology, Kansas University Medical Center, Kansas City, KS, USA
| | - Hao Xuan
- Department of Electrical Engineering and Computer Science, University of Kansas, Lawrence, KS, USA
| | - Ishfaq Ahmed
- Department of Surgery, Kansas University Medical Center, Kansas City, KS, USA
| | - Ganeshkumar Rajendran
- Department of Urology, University of Kansas Medical Center, 3901 Rainbow Blvd, MS 1018, Kansas City, KS, 66160, USA
| | - Erika Abbott
- Department of Urology, University of Kansas Medical Center, 3901 Rainbow Blvd, MS 1018, Kansas City, KS, 66160, USA
| | - Katie Dennis
- Department of Pathology, Kansas University Medical Center, Kansas City, KS, USA
| | - Cuncong Zhong
- Department of Electrical Engineering and Computer Science, University of Kansas, Lawrence, KS, USA
| | - Shahid Umar
- Department of Surgery, Kansas University Medical Center, Kansas City, KS, USA
| | - John A Taylor
- Department of Urology, University of Kansas Medical Center, 3901 Rainbow Blvd, MS 1018, Kansas City, KS, 66160, USA.
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Kruckow KL, Murray E, Shayhidin E, Rosenberg AF, Bowdish DME, Orihuela CJ. Chronic TNF exposure induces glucocorticoid-like immunosuppression in the alveolar macrophages of aged mice that enhances their susceptibility to pneumonia. Aging Cell 2024; 23:e14133. [PMID: 38459711 PMCID: PMC11296116 DOI: 10.1111/acel.14133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Revised: 01/22/2024] [Accepted: 02/12/2024] [Indexed: 03/10/2024] Open
Abstract
Chronic low-grade inflammation, particularly elevated tumor necrosis factor (TNF) levels, occurs due to advanced age and is associated with greater susceptibility to infection. One reason for this is age-dependent macrophage dysfunction (ADMD). Herein, we use the adoptive transfer of alveolar macrophages (AM) from aged mice into the airway of young mice to show that inherent age-related defects in AM were sufficient to increase the susceptibility to Streptococcus pneumoniae, a Gram-positive bacterium and the leading cause of community-acquired pneumonia. MAPK phosphorylation arrays using AM lysates from young and aged wild-type (WT) and TNF knockout (KO) mice revealed multilevel TNF-mediated suppression of kinase activity in aged mice. RNAseq analyses of AM validated the suppression of MAPK signaling as a consequence of TNF during aging. Two regulatory phosphatases that suppress MAPK signaling, Dusp1 and Ptprs, were confirmed to be upregulated with age and as a result of TNF exposure both ex vivo and in vitro. Dusp1 is known to be responsible for glucocorticoid-mediated immune suppression, and dexamethasone treatment increased Dusp1 and Ptprs expression in cells and recapitulated the ADMD phenotype. In young mice, treatment with dexamethasone increased the levels of Dusp1 and Ptprs and their susceptibility to infection. TNF-neutralizing antibody reduced Dusp1 and Ptprs levels in AM from aged mice and reduced pneumonia severity following bacterial challenge. We conclude that chronic exposure to TNF increases the expression of the glucocorticoid-associated MAPK signaling suppressors, Dusp1 and Ptprs, which inhibits AM activation and increases susceptibility to bacterial pneumonia in older adults.
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Affiliation(s)
- Katherine L. Kruckow
- Department of MicrobiologyUniversity of Alabama at BirminghamBirminghamAlabamaUSA
| | - Elizabeth Murray
- Department of MicrobiologyUniversity of Alabama at BirminghamBirminghamAlabamaUSA
| | - Elnur Shayhidin
- Firestone Institute for Respiratory HealthSt. Joseph's Healthcare HamiltonHamiltonOntarioCanada
- The M.G. DeGroote Institute for Infectious Disease ResearchMcMaster UniversityHamiltonOntarioCanada
| | - Alexander F. Rosenberg
- Department of MicrobiologyUniversity of Alabama at BirminghamBirminghamAlabamaUSA
- Informatics InstituteUniversity of Alabama at BirminghamBirminghamAlabamaUSA
| | - Dawn M. E. Bowdish
- Firestone Institute for Respiratory HealthSt. Joseph's Healthcare HamiltonHamiltonOntarioCanada
- The M.G. DeGroote Institute for Infectious Disease ResearchMcMaster UniversityHamiltonOntarioCanada
| | - Carlos J. Orihuela
- Department of MicrobiologyUniversity of Alabama at BirminghamBirminghamAlabamaUSA
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Dominique GM, Hammond C, Stack MS. The Gut Microbiome in Aging and Ovarian Cancer. AGING AND CANCER 2024; 5:14-34. [PMID: 39132604 PMCID: PMC11309124 DOI: 10.1002/aac2.12071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2024] [Accepted: 05/30/2024] [Indexed: 08/13/2024]
Abstract
The gut microbiome changes with age and affects regions beyond the gut, including the ovarian cancer tumor microenvironment. In this review summarizing the literature on the gut microbiome in ovarian cancer and in aging, we note trends in the microbiota composition common to both phenomena and trends that are distinctly opposite. Both ovarian cancer and aging are characterized by an increase in proinflammatory bacterial species, particularly those belonging to phylum Proteobacteria and genus Escherichia, and a decrease in short chain fatty acid producers, particularly those in Clostridium cluster XIVa (family Lachnospiraceae) and the Actinobacteria genus Bifidobacterium. However, while beneficial bacteria from family Porphyromonadaceae and genus Akkermansia tend to increase with normal, healthy aging, these bacteria tend to decrease in ovarian cancer, similar to what is observed in obesity or unhealthy aging. We also note a lack in the current literature of research demonstrating causal relationships between the gut microbiome and ovarian cancer outcomes and research on the gut microbiome in ovarian cancer in the context of aging, both of which could lead to improvements to ovarian cancer diagnosis and treatment.
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Affiliation(s)
- Gena M Dominique
- Department of Chemistry and Biochemistry, Harper Cancer Research Institute, University of Notre Dame, Notre Dame, IN
| | | | - M Sharon Stack
- Department of Chemistry and Biochemistry, Harper Cancer Research Institute, University of Notre Dame, Notre Dame, IN
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Fan J, Zhu J, Zhu H, Xu H. Potential therapeutic targets in myeloid cell therapy for overcoming chemoresistance and immune suppression in gastrointestinal tumors. Crit Rev Oncol Hematol 2024; 198:104362. [PMID: 38614267 DOI: 10.1016/j.critrevonc.2024.104362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2023] [Revised: 03/26/2024] [Accepted: 04/10/2024] [Indexed: 04/15/2024] Open
Abstract
In the tumor microenvironment (TME), myeloid cells play a pivotal role. Myeloid-derived immunosuppressive cells, including tumor-associated macrophages (TAMs) and myeloid-derived suppressor cells (MDSCs), are central components in shaping the immunosuppressive milieu of the tumor. Within the TME, a majority of TAMs assume an M2 phenotype, characterized by their pro-tumoral activity. These cells promote tumor cell growth, angiogenesis, invasion, and migration. In contrast, M1 macrophages, under appropriate activation conditions, exhibit cytotoxic capabilities against cancer cells. However, an excessive M1 response may lead to pro-tumoral inflammation. As a result, myeloid cells have emerged as crucial targets in cancer therapy. This review concentrates on gastrointestinal tumors, detailing methods for targeting macrophages to enhance tumor radiotherapy and immunotherapy sensitivity. We specifically delve into monocytes and tumor-associated macrophages' various functions, establishing an immunosuppressive microenvironment, promoting tumorigenic inflammation, and fostering neovascularization and stromal remodeling. Additionally, we examine combination therapeutic strategies.
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Affiliation(s)
- Jiawei Fan
- Department of Gastroenterology, The First Hospital of Jilin University, 1 Xinmin Street, Changchun 130021, PR China
| | - Jianshu Zhu
- Department of Spine Surgery, The First Hospital of Jilin University, 1 Xinmin Street, Changchun 130021, PR China
| | - He Zhu
- Department of Gastroenterology, The First Hospital of Jilin University, 1 Xinmin Street, Changchun 130021, PR China
| | - Hong Xu
- Department of Gastroenterology, The First Hospital of Jilin University, 1 Xinmin Street, Changchun 130021, PR China.
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Tamayo M, Olivares M, Ruas-Madiedo P, Margolles A, Espín JC, Medina I, Moreno-Arribas MV, Canals S, Mirasso CR, Ortín S, Beltrán-Sanchez H, Palloni A, Tomás-Barberán FA, Sanz Y. How Diet and Lifestyle Can Fine-Tune Gut Microbiomes for Healthy Aging. Annu Rev Food Sci Technol 2024; 15:283-305. [PMID: 38941492 DOI: 10.1146/annurev-food-072023-034458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/30/2024]
Abstract
Many physical, social, and psychological changes occur during aging that raise the risk of developing chronic diseases, frailty, and dependency. These changes adversely affect the gut microbiota, a phenomenon known as microbe-aging. Those microbiota alterations are, in turn, associated with the development of age-related diseases. The gut microbiota is highly responsive to lifestyle and dietary changes, displaying a flexibility that also provides anactionable tool by which healthy aging can be promoted. This review covers, firstly, the main lifestyle and socioeconomic factors that modify the gut microbiota composition and function during healthy or unhealthy aging and, secondly, the advances being made in defining and promoting healthy aging, including microbiome-informed artificial intelligence tools, personalized dietary patterns, and food probiotic systems.
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Affiliation(s)
- M Tamayo
- Institute of Agrochemistry and Food Technology, Spanish National Research Council (IATA-CSIC), Valencia, Spain;
- Faculty of Medicine, Autonomous University of Madrid (UAM), Spain
| | - M Olivares
- Institute of Agrochemistry and Food Technology, Spanish National Research Council (IATA-CSIC), Valencia, Spain;
| | | | - A Margolles
- Health Research Institute (ISPA), Asturias, Spain
| | - J C Espín
- Laboratory of Food & Health, Group of Quality, Safety, and Bioactivity of Plant Foods, Centro de Edafología y Biología Aplicada del Segura (CEBAS-CSIC), Murcia, Spain
| | - I Medina
- Instituto de Investigaciones Marinas, Spanish National Research Council (IIM-CSIC), Vigo, Spain
| | | | - S Canals
- Instituto de Neurociencias, Universidad Miguel Hernández-CSIC, Sant Joan d'Alacant, Spain
| | - C R Mirasso
- Instituto de Física Interdisciplinar y Sistemas Complejos IFISC (UIB-CSIC), Campus Universitat de les Illes Balears, Palma de Mallorca, Spain
| | - S Ortín
- Instituto de Física Interdisciplinar y Sistemas Complejos IFISC (UIB-CSIC), Campus Universitat de les Illes Balears, Palma de Mallorca, Spain
| | - H Beltrán-Sanchez
- Department of Community Health Sciences, Fielding School of Public Health and California Center for Population Research, University of California, Los Angeles, California, USA
| | - A Palloni
- Department of Sociology, University of Wisconsin, Madison, Wisconsin, USA
| | - F A Tomás-Barberán
- Laboratory of Food & Health, Group of Quality, Safety, and Bioactivity of Plant Foods, Centro de Edafología y Biología Aplicada del Segura (CEBAS-CSIC), Murcia, Spain
| | - Y Sanz
- Institute of Agrochemistry and Food Technology, Spanish National Research Council (IATA-CSIC), Valencia, Spain;
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Muñoz-Fernandez SS, Garcez FB, Alencar JCG, Bastos AA, Morley JE, Cederholm T, Aprahamian I, de Souza HP, Avelino-Silva TJ, Bindels LB, Ribeiro SML. Gut microbiota disturbances in hospitalized older adults with malnutrition and clinical outcomes. Nutrition 2024; 122:112369. [PMID: 38422755 DOI: 10.1016/j.nut.2024.112369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Revised: 01/15/2024] [Accepted: 01/23/2024] [Indexed: 03/02/2024]
Abstract
OBJECTIVE Malnutrition is one of the most threatening conditions in geriatric populations. The gut microbiota has an important role in the host's metabolic and muscular health: however, its interplay with disease-related malnutrition is not well understood. We aimed to identify the association of malnutrition with the gut microbiota and predict clinical outcomes in hospitalized acutely ill older adults. METHODS We performed a secondary longitudinal analysis in 108 geriatric patients from a prospective cohort evaluated at admission and 72 h of hospitalization. We collected clinical, demographic, nutritional, and 16S rRNA gene-sequenced gut microbiota data. Microbiota diversity, overall composition, and differential abundance were calculated and compared between patients with and without malnutrition. Microbiota features associated with malnutrition were used to predict clinical outcomes. RESULTS Patients with malnutrition (51%) had a different microbiota composition compared to those who were well-nourished during hospitalization (ANOSIM R = 0.079, P = 0.003). Patients with severe malnutrition showed poorer α-diversity at admission (Shannon P = 0.012, Simpson P = 0.018) and follow-up (Shannon P = 0.023, Chao1 P = 0.008). Differential abundance of Lachnospiraceae NK4A136 group, Subdoligranulum, and Faecalibacterium prausnitzii were significantly lower and inversely associated with malnutrition, while Corynebacterium, Ruminococcaceae Incertae Sedis, and Fusobacterium were significantly increased and positively associated with malnutrition. Corynebacterium, Ruminococcaceae Incertae Sedis, and the overall composition were important predictors of critical care in patients with malnutrition during hospitalization. CONCLUSION Older adults with malnutrition, especially in a severe stage, may be subject to substantial gut microbial disturbances during hospitalization. The gut microbiota profile of patients with malnutrition might help us to predict worse clinical outcomes.
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Affiliation(s)
- Shirley S Muñoz-Fernandez
- Nutrition Department, School of Public Health, University of São Paulo, São Paulo, Sao Paulo, Brazil.
| | - Flavia B Garcez
- Laboratorio de Investigacao Medica em Envelhecimento (LIM 66), Servico de Geriatria, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Sao Paulo, Brazil; Departamento de Medicina, Hospital Universitario, Universidade Federal de Sergipe, Aracaju, Sergipe, Brazil
| | - Julio C G Alencar
- Disciplina de Emergencias Clínicas, Departamento de Clínica Medica, Faculty of Medicine, University of São Paulo, São Paulo, Sao Paulo, Brazil
| | - Amália A Bastos
- Nutrition Department, School of Public Health, University of São Paulo, São Paulo, Sao Paulo, Brazil
| | - John E Morley
- Division of Geriatric Medicine, School of Medicine, Saint Louis University, St. Louis, Missouri, USA
| | - Tommy Cederholm
- Department of Public Health and Caring Sciences, Clinical Nutrition and Metabolism, Uppsala University, Uppsala, Sweden; Karolinska University Hospital, Stockholm, Sweden
| | - Ivan Aprahamian
- Division of Geriatrics, Department of Internal Medicine, Jundiaí Medical School, Group of Investigation on Multimorbidity and Mental Health in Aging (GIMMA), Jundiaí, Sao Paulo, Brazil
| | - Heraldo P de Souza
- Disciplina de Emergencias Clínicas, Departamento de Clínica Medica, Faculty of Medicine, University of São Paulo, São Paulo, Sao Paulo, Brazil
| | - Thiago J Avelino-Silva
- Laboratorio de Investigacao Medica em Envelhecimento (LIM 66), Servico de Geriatria, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Sao Paulo, Brazil
| | - Laure B Bindels
- Metabolism and Nutrition Research Group, Louvain Drug Research Institute, Université catholique de Louvain, Brussels, Belgium
| | - Sandra M L Ribeiro
- Nutrition Department, School of Public Health, University of São Paulo, São Paulo, Sao Paulo, Brazil; School of Arts, Science, and Humanity, University of São Paulo, São Paulo, Sao Paulo, Brazil
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