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Cissé M, Neunlist M. Enteric Glial Cells at the Crossroads Between Intestinal Inflammation and Amyloids Diseases. Cell Mol Gastroenterol Hepatol 2024:101359. [PMID: 38823790 DOI: 10.1016/j.jcmgh.2024.05.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/12/2024] [Revised: 05/02/2024] [Accepted: 05/08/2024] [Indexed: 06/03/2024]
Affiliation(s)
- Moustapha Cissé
- Nantes Université, INSERM, CHU Nantes, IMAD, "The Enteric Nervous System in Gut and Brain Disorders", Nantes, France.
| | - Michel Neunlist
- Nantes Université, INSERM, CHU Nantes, IMAD, "The Enteric Nervous System in Gut and Brain Disorders", Nantes, France.
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Delfino G, Briand JB, Oullier T, Nienkemper L, Greig J, Véziers J, Neunlist M, Derkinderen P, Paillusson S. Characterization of mitochondria-associated ER membranes in the enteric nervous system under physiological and pathological conditions. Am J Physiol Gastrointest Liver Physiol 2024; 326:G330-G343. [PMID: 38226933 PMCID: PMC11211041 DOI: 10.1152/ajpgi.00224.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 12/08/2023] [Accepted: 01/08/2024] [Indexed: 01/17/2024]
Abstract
Alterations in endoplasmic reticulum (ER)-mitochondria associations and in mitochondria-associated ER membrane (MAM) behavior have been reported in the brain in several neurodegenerative diseases. Despite the emerging role of the gut-brain axis in neurodegenerative disorders, the biology of MAM in the enteric nervous system (ENS) has not previously been studied. Therefore, we set out to characterize the MAM in the distal colon of wild-type C57BL/6J mice and senescence-accelerated mouse prone 8 (SAMP8), a mouse model of age-related neurodegeneration. We showed for the first time that MAMs are widely present in enteric neurons and that their association is altered in SAMP8 mice. We then examined the functions of MAMs in a primary culture model of enteric neurons and showed that calcium homeostasis was altered in SAMP8 mice when compared with control animals. These findings provide the first detailed characterization of MAMs in the ENS under physiological conditions and during age-associated neurodegeneration. Further investigation of MAM modifications in the ENS in disease may provide valuable information about the possible role of enteric MAMs in neurodegenerative diseases.NEW & NOTEWORTHY Our work shows for the first time the presence of contacts between endoplasmic reticulum and mitochondria in the enteric neurons and that the dynamic of these contacts is affected in these cells from an age-related neurodegeneration mouse model. It provides new insights into the potential role of enteric mitochondria-associated endoplasmic reticulum membrane in neurodegenerative disorders.
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Affiliation(s)
- Giada Delfino
- Nantes Université, Institut National de la Santé et de la Recherche Médicale (INSERM), Centre Hospitalier Universitaire (CHU) Nantes, The Enteric Nervous System in Gut and Brain Disorders, Nantes, France
| | - Jean Baptiste Briand
- Nantes Université, Institut National de la Santé et de la Recherche Médicale (INSERM), Centre Hospitalier Universitaire (CHU) Nantes, The Enteric Nervous System in Gut and Brain Disorders, Nantes, France
| | - Thibauld Oullier
- Nantes Université, Institut National de la Santé et de la Recherche Médicale (INSERM), Centre Hospitalier Universitaire (CHU) Nantes, The Enteric Nervous System in Gut and Brain Disorders, Nantes, France
| | - Léa Nienkemper
- Nantes Université, Institut National de la Santé et de la Recherche Médicale (INSERM), Centre Hospitalier Universitaire (CHU) Nantes, The Enteric Nervous System in Gut and Brain Disorders, Nantes, France
| | - Jenny Greig
- INSERM, Centre de Recherche en Transplantation et Immunologie, Institut de Transplantation Urologie Néphrologie, Nantes, France
| | - Joëlle Véziers
- INSERM, Regenerative Medicine and Skeleton, Nantes Université, Oniris, Univ Angers, RMeS, Nantes, France
| | - Michel Neunlist
- Nantes Université, Institut National de la Santé et de la Recherche Médicale (INSERM), Centre Hospitalier Universitaire (CHU) Nantes, The Enteric Nervous System in Gut and Brain Disorders, Nantes, France
| | - Pascal Derkinderen
- Nantes Université, Institut National de la Santé et de la Recherche Médicale (INSERM), Centre Hospitalier Universitaire (CHU) Nantes, The Enteric Nervous System in Gut and Brain Disorders, Nantes, France
| | - Sébastien Paillusson
- Nantes Université, Institut National de la Santé et de la Recherche Médicale (INSERM), Centre Hospitalier Universitaire (CHU) Nantes, The Enteric Nervous System in Gut and Brain Disorders, Nantes, France
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Kang J, Lee M, Park M, Lee J, Lee S, Park J, Koyanagi A, Smith L, Nehs CJ, Yon DK, Kim T. Slow gut transit increases the risk of Alzheimer's disease: An integrated study of the bi-national cohort in South Korea and Japan and Alzheimer's disease model mice. J Adv Res 2023:S2090-1232(23)00397-1. [PMID: 38097171 DOI: 10.1016/j.jare.2023.12.010] [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: 09/17/2023] [Revised: 11/20/2023] [Accepted: 12/12/2023] [Indexed: 01/02/2024] Open
Abstract
INTRODUCTION Although the association between Alzheimer's disease (AD) and constipation is controversial, its causality and underlying mechanisms remain unknown. OBJECTIVES To investigate the potential association between slow gut transit and AD using epidemiological data and a murine model. METHODS We conducted a bi-national cohort study in South Korea (discovery cohort, N=3,130,193) and Japan (validation cohort, N=4,379,285) during the pre-observation period to determine the previous diagnostic history (2009-2010) and the follow-up period (2011-2021). To evaluate the causality, we induced slow gut transit using loperamide in 5xFAD transgenic mice. Changes in amyloid-beta (Aβ) and other markers were examined using ELISA, qRT-PCR, RNA-seq, and behavioral tests. RESULTS Constipation was associated with an increased risk of AD in the discovery cohort (hazard ratio, 2.04; 95% confidence interval [CI], 2.01-2.07) and the validation cohort (hazard ratio; 2.82; 95% CI, 2.61-3.05). We found that loperamide induced slower gut transit in 5xFAD mice, increased Aβ and microglia levels in the brain, increased transcription of genes related to norepinephrine secretion and immune responses, and decreased the transcription of defense against bacteria in the colonic tissue. CONCLUSION Impaired gut transit may contribute to AD pathogenesis via the gut-brain axis, thus suggesting a cyclical relationship between intestinal barrier disruption and Aβ accumulation in the brain. We propose that gut transit or motility may be a modifiable lifestyle factor in the prevention of AD, and further clinical investigations are warranted.
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Affiliation(s)
- Jiseung Kang
- Department of Biomedical Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, Republic of Korea; Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Boston, MA, United States; Division of Sleep Medicine, Harvard Medical School, Boston, MA, United States
| | - Myeongcheol Lee
- Center for Digital Health, Medical Science Research Institute, Kyung Hee University Medical Center, Kyung Hee University College of Medicine, Seoul, Republic of Korea; Department of Regulatory Science, Kyung Hee University, Seoul, Republic of Korea
| | - Mincheol Park
- Department of Biomedical Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, Republic of Korea
| | - Jibeom Lee
- Department of Biomedical Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, Republic of Korea
| | - Sunjae Lee
- School of Life Sciences, Gwangju Institute of Science and Technology, Gwangju, Republic of Korea
| | - Jaeyu Park
- Center for Digital Health, Medical Science Research Institute, Kyung Hee University Medical Center, Kyung Hee University College of Medicine, Seoul, Republic of Korea; Department of Regulatory Science, Kyung Hee University, Seoul, Republic of Korea
| | - Ai Koyanagi
- Research and Development Unit, Parc Sanitari Sant Joan de Deu, Barcelona, Spain
| | - Lee Smith
- Centre for Health, Performance and Wellbeing, Anglia Ruskin University, Cambridge, UK
| | - Christa J Nehs
- Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Boston, MA, United States; Division of Sleep Medicine, Harvard Medical School, Boston, MA, United States
| | - Dong Keon Yon
- Center for Digital Health, Medical Science Research Institute, Kyung Hee University Medical Center, Kyung Hee University College of Medicine, Seoul, Republic of Korea; Department of Regulatory Science, Kyung Hee University, Seoul, Republic of Korea; Department of Pediatrics, Kyung Hee University Medical Center, Kyung Hee University College of Medicine, Seoul, Republic of Korea.
| | - Tae Kim
- Department of Biomedical Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, Republic of Korea.
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Iancu MA, Profir M, Roşu OA, Ionescu RF, Cretoiu SM, Gaspar BS. Revisiting the Intestinal Microbiome and Its Role in Diarrhea and Constipation. Microorganisms 2023; 11:2177. [PMID: 37764021 PMCID: PMC10538221 DOI: 10.3390/microorganisms11092177] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 08/24/2023] [Accepted: 08/25/2023] [Indexed: 09/29/2023] Open
Abstract
The gut microbiota represents a community of microorganisms (bacteria, fungi, archaea, viruses, and protozoa) that colonize the gut and are responsible for gut mucosal structural integrity and immune and metabolic homeostasis. The relationship between the gut microbiome and human health has been intensively researched in the past years. It is now widely recognized that gut microbial composition is highly responsible for the general health of the host. Among the diseases that have been linked to an altered gut microbial population are diarrheal illnesses and functional constipation. The capacity of probiotics to modulate the gut microbiome population, strengthen the intestinal barrier, and modulate the immune system together with their antioxidant properties have encouraged the research of probiotic therapy in many gastrointestinal afflictions. Dietary and lifestyle changes and the use of probiotics seem to play an important role in easing constipation and effectively alleviating diarrhea by suppressing the germs involved. This review aims to describe how probiotic bacteria and the use of specific strains could interfere and bring benefits as an associated treatment for diarrhea and constipation.
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Affiliation(s)
- Mihaela Adela Iancu
- Department of Family Medicine, “Carol Davila” University of Medicine and Pharmacy, 050474 Bucharest, Romania;
| | - Monica Profir
- Department of Oncology, Elias University Emergency Hospital, 011461 Bucharest, Romania; (M.P.); (O.A.R.)
| | - Oana Alexandra Roşu
- Department of Oncology, Elias University Emergency Hospital, 011461 Bucharest, Romania; (M.P.); (O.A.R.)
| | - Ruxandra Florentina Ionescu
- Department of Morphological Sciences, Cell and Molecular Biology and Histology, “Carol Davila” University of Medicine and Pharmacy, 050474 Bucharest, Romania;
- Department of Cardiology I, “Dr. Carol Davila” Central Military Emergency Hospital, 010825 Bucharest, Romania
| | - Sanda Maria Cretoiu
- Department of Morphological Sciences, Cell and Molecular Biology and Histology, “Carol Davila” University of Medicine and Pharmacy, 050474 Bucharest, Romania;
| | - Bogdan Severus Gaspar
- Surgery Clinic, Emergency Clinical Hospital, 014461 Bucharest, Romania;
- Department of Surgery, Carol Davila University of Medicine and Pharmacy, 050474 Bucharest, Romania
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Thomas S, Prendergast GC. Gut-brain connections in neurodegenerative disease: immunotherapeutic targeting of Bin1 in inflammatory bowel disease and Alzheimer's disease. Front Pharmacol 2023; 14:1183932. [PMID: 37521457 PMCID: PMC10372349 DOI: 10.3389/fphar.2023.1183932] [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: 03/10/2023] [Accepted: 06/13/2023] [Indexed: 08/01/2023] Open
Abstract
Longer lifespan produces risks of age-associated neurodegenerative disorders such as Alzheimer's disease (AD), which is characterized by declines in memory and cognitive function. The pathogenic causes of AD are thought to reflect a progressive aggregation in the brain of amyloid plaques composed of beta-amyloid (Aß) peptides and neurofibrillary tangles composed of phosphorylated tau protein. Recently, long-standing investigations of the Aß disease hypothesis gained support via a passive immunotherapy targeting soluble Aß protein. Tau-targeting approaches using antibodies are also being pursued as a therapeutic approach to AD. In genome-wide association studies, the disease modifier gene Bin1 has been identified as a top risk factor for late-onset AD in human populations, with recent studies suggesting that Bin1 binds tau and influences its extracellular deposition. Interestingly, before AD emerges in the brain, tau levels rise in the colon, where Bin1-a modifier of tissue barrier function and inflammation-acts to promote inflammatory bowel disease (IBD). This connection is provocative given clinical evidence of gut-brain communication in age-associated neurodegenerative disorders, including AD. In this review, we discuss a Bin1-targeting passive immunotherapy developed in our laboratory to treat IBD that may offer a strategy to indirectly reduce tau deposition and limit AD onset or progression.
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Liu X, Zeng Q, Luo X, Li K, Xu X, Hong L, Li J, Guan X, Xu X, Huang P, Zhang M. Effects of APOE ε2 allele on basal forebrain functional connectivity in mild cognitive impairment. CNS Neurosci Ther 2022; 29:597-608. [PMID: 36468416 PMCID: PMC9873529 DOI: 10.1111/cns.14038] [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: 06/09/2022] [Revised: 10/27/2022] [Accepted: 11/10/2022] [Indexed: 12/10/2022] Open
Abstract
BACKGROUND Basal forebrain cholinergic system (BFCS) dysfunction is associated with cognitive decline in Alzheimer's disease (AD) and mild cognitive impairment (MCI). Apolipoprotein E (APOE) ε2 is a protective genetic factor in AD and MCI, and cholinergic sprouting depends on APOE. OBJECTIVE We investigated the effect of the APOE ε2 allele on BFCS functional connectivity (FC) in cognitively normal (CN) subjects and MCI patients. METHOD We included 60 MCI patients with APOE ε3/ε3, 18 MCI patients with APOE ε2/ε3, 73 CN subjects with APOE ε3/ε3, and 36 CN subjects with APOE ε2/ε3 genotypes who had resting-state functional magnetic resonance imaging data from the Alzheimer's disease Neuroimaging Initiative. We used BFCS subregions (Ch1-3 and Ch4) as seeds and calculated the FC with other brain areas. Using a mixed-effect analysis, we explored the interaction effects of APOE ε2 allele × cognitive status on BFCS-FC. Furthermore, we examined the relationships between imaging metrics, cognitive abilities, and AD pathology markers, controlling for sex, age, and education as covariates. RESULTS An interaction effect on functional connectivity was found between the right Ch4 (RCh4) and left insula (p < 0.05, corrected), and between the RCh4 and left Rolandic operculum (p < 0.05, corrected). Among all subjects and APOE ε2 carriers, RCh4-left Insula FC was associated with early tau deposition. Furthermore, no correlation was found between imaging metrics and amyloid burden. Among all subjects and APOE ε2 carriers, FC metrics were associated with cognitive performance. CONCLUSION The APOE ε2 genotype may play a protective role during BFCS degeneration in MCI.
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Affiliation(s)
- Xiaocao Liu
- Department of RadiologyThe 2nd Affiliated Hospital of Zhejiang University School of MedicineHangzhouChina
| | - Qingze Zeng
- Department of RadiologyThe 2nd Affiliated Hospital of Zhejiang University School of MedicineHangzhouChina
| | - Xiao Luo
- Department of RadiologyThe 2nd Affiliated Hospital of Zhejiang University School of MedicineHangzhouChina
| | - Kaicheng Li
- Department of RadiologyThe 2nd Affiliated Hospital of Zhejiang University School of MedicineHangzhouChina
| | - Xiaopei Xu
- Department of RadiologyThe 2nd Affiliated Hospital of Zhejiang University School of MedicineHangzhouChina
| | - Luwei Hong
- Department of RadiologyThe 2nd Affiliated Hospital of Zhejiang University School of MedicineHangzhouChina
| | - Jixuan Li
- Department of RadiologyThe 2nd Affiliated Hospital of Zhejiang University School of MedicineHangzhouChina
| | - Xiaojun Guan
- Department of RadiologyThe 2nd Affiliated Hospital of Zhejiang University School of MedicineHangzhouChina
| | - Xiaojun Xu
- Department of RadiologyThe 2nd Affiliated Hospital of Zhejiang University School of MedicineHangzhouChina
| | - Peiyu Huang
- Department of RadiologyThe 2nd Affiliated Hospital of Zhejiang University School of MedicineHangzhouChina
| | - Min‐Ming Zhang
- Department of RadiologyThe 2nd Affiliated Hospital of Zhejiang University School of MedicineHangzhouChina
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