401
|
Rice MW, Pandya JD, Shear DA. Gut Microbiota as a Therapeutic Target to Ameliorate the Biochemical, Neuroanatomical, and Behavioral Effects of Traumatic Brain Injuries. Front Neurol 2019; 10:875. [PMID: 31474930 PMCID: PMC6706789 DOI: 10.3389/fneur.2019.00875] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Accepted: 07/29/2019] [Indexed: 12/21/2022] Open
Abstract
Current efficacious treatments for traumatic brain injury (TBI) are lacking. Establishment of a protective gut microbiota population offers a compelling therapeutic avenue, as brain injury induces disruptions in the composition of the gut microbiota, i.e., gut dysbiosis, which has been shown to contribute to TBI-related neuropathology and impaired behavioral outcomes. The gut microbiome is involved in the modulation of a multitude of cellular and molecular processes fundamental to the progression of TBI-induced pathologies including neuroinflammation, blood brain barrier permeability, immune system response, microglial activation, and mitochondrial dysfunction, as well as intestinal motility and permeability. Additionally, gut dysbiosis further aggravates behavioral impairments in animal models of TBI and spinal cord injury, as well as negatively affects health outcomes in murine stroke models. Recent studies indicate that microbiota transplants and probiotics ameliorate neuroanatomical damage and functional impairments in animal models of stroke and spinal cord injury. In addition, probiotics have been shown to reduce the rate of infection and time spent in intensive care of hospitalized patients suffering from brain trauma. Perturbations in the composition of the gut microbiota and its metabolite profile may also serve as potential diagnostic and theragnostic biomarkers for injury severity and progression. This review aims to address the etiological role of the gut microbiome in the biochemical, neuroanatomical, and behavioral/cognitive consequences of TBI, as well as explore the potential of gut microbiome manipulation in the form of probiotics as an effective therapeutic to ameliorate TBI-induced pathology and symptoms.
Collapse
Affiliation(s)
- Matthew W Rice
- Brain Trauma Neuroprotection Branch, Center for Military Psychiatry and Neuroscience, Walter Reed Army Institute of Research, Silver Spring, MD, United States
| | - Jignesh D Pandya
- Brain Trauma Neuroprotection Branch, Center for Military Psychiatry and Neuroscience, Walter Reed Army Institute of Research, Silver Spring, MD, United States
| | - Deborah A Shear
- Brain Trauma Neuroprotection Branch, Center for Military Psychiatry and Neuroscience, Walter Reed Army Institute of Research, Silver Spring, MD, United States
| |
Collapse
|
402
|
Correlation between Jejunal Microbial Diversity and Muscle Fatty Acids Deposition in Broilers Reared at Different Ambient Temperatures. Sci Rep 2019; 9:11022. [PMID: 31363155 PMCID: PMC6667446 DOI: 10.1038/s41598-019-47323-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Accepted: 07/12/2019] [Indexed: 12/14/2022] Open
Abstract
Temperature, which is an important environmental factor in broiler farming, can significantly influence the deposition of fatty acids in muscle. 300 one-day-old broiler chicks were randomly divided into three groups and reared at high, medium and low temperatures (HJ, MJ and LJ), respectively. Breast muscle and jejunal chyme samples were collected and subjected to analyses of fatty acid composition and 16S rRNA gene sequencing. Through spearman’s rank correlation coefficient, the data were used to characterize the correlation between jejunal microbial diversity and muscle fatty acid deposition in the broilers. The results showed that Achromobacter, Stenotrophomonas, Pandoraea, Brevundimonas, Petrobacter and Variovorax were significantly enriched in the MJ group, and all of them were positively correlated with the fatty acid profiling of muscle and multiple lipid metabolism signaling pathways. Lactobacillus was significantly enriched in the HJ group and exhibited a positive correlation with fatty acid deposition. Pyramidobacter, Dialister, Bacteroides and Selenomonas were significantly enriched in the LJ group and displayed negative correlation with fatty acid deposition. Taken together, this study demonstrated that the jejunal microflora manifested considerable changes at high and low ambient temperatures and that jejunal microbiota changes were correlated with fatty acid deposition of muscle in broilers.
Collapse
|
403
|
Hypoxia and Inflammation as a Consequence of β-Fibril Accumulation: A Perspective View for New Potential Therapeutic Targets. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:7935310. [PMID: 31346362 PMCID: PMC6618348 DOI: 10.1155/2019/7935310] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Accepted: 05/22/2019] [Indexed: 11/30/2022]
Abstract
Amyloidoses are heterogeneous diseases that result from the deposition of toxic insoluble β-sheet fibrillar protein aggregates in different tissues. The cascade of molecular events leading to amyloidoses and to the related clinical manifestations is not completely understood. Nevertheless, it is known that tissue damage associated to this disease involves alteration of tissue architecture, interaction with cell surface receptors, inflammation elicited by the amyloid protein deposition, oxidative stress, and apoptosis. However, another important aspect to consider is that systemic protein massive deposition not only subverts tissue architecture but also determines a progressive cellular hypertrophy and dilation of the extracellular space enlarging the volume of the organ. Such an alteration increases the distance between cells and vessels with a drop in pO2 that, in turn, causes both necrotic cell death and activation of the hypoxia transcription factor HIF-1α. Herewith, we propose the hypothesis that both cell death and hypoxia represent two important events for the pathogenesis of damage and progression of amyloidoses. In fact, molecules released by necrotic cells activate inflammatory cells from one side while binding to HIF-1α-dependent membrane receptors expressed on hypoxic parenchymal cells on the other side. This latter event generates a signaling cascade triggering NFκB activation and chronic inflammation. Finally, we also suggest that this scenario, once proved and detailed, might suggest important targets for new therapeutic interventions.
Collapse
|
404
|
Iannone LF, Preda A, Blottière HM, Clarke G, Albani D, Belcastro V, Carotenuto M, Cattaneo A, Citraro R, Ferraris C, Ronchi F, Luongo G, Santocchi E, Guiducci L, Baldelli P, Iannetti P, Pedersen S, Petretto A, Provasi S, Selmer K, Spalice A, Tagliabue A, Verrotti A, Segata N, Zimmermann J, Minetti C, Mainardi P, Giordano C, Sisodiya S, Zara F, Russo E, Striano P. Microbiota-gut brain axis involvement in neuropsychiatric disorders. Expert Rev Neurother 2019; 19:1037-1050. [PMID: 31260640 DOI: 10.1080/14737175.2019.1638763] [Citation(s) in RCA: 100] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Introduction: The microbiota-gut brain (MGB) axis is the bidirectional communication between the intestinal microbiota and the brain. An increasing body of preclinical and clinical evidence has revealed that the gut microbial ecosystem can affect neuropsychiatric health. However, there is still a need of further studies to elucidate the complex gene-environment interactions and the role of the MGB axis in neuropsychiatric diseases, with the aim of identifying biomarkers and new therapeutic targets, to allow early diagnosis and improving treatments. Areas covered: To review the role of MGB axis in neuropsychiatric disorders, prediction and prevention of disease through exploitation, integration, and combination of data from existing gut microbiome/microbiota projects and appropriate other International '-Omics' studies. The authors also evaluated the new technological advances to investigate and modulate, through nutritional and other interventions, the gut microbiota. Expert opinion: The clinical studies have documented an association between alterations in gut microbiota composition and/or function, whereas the preclinical studies support a role for the gut microbiota in impacting behaviors which are of relevance to psychiatry and other central nervous system (CNS) disorders. Targeting MGB axis could be an additional approach for treating CNS disorders and all conditions in which alterations of the gut microbiota are involved.
Collapse
Affiliation(s)
- Luigi Francesco Iannone
- Science of Health Department, School of Medicine, University of Catanzaro , Catanzaro , Italy
| | - Alberto Preda
- Paediatric Neurology and Muscular Diseases Unit, Department of Neurosciences, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health, University of Genoa, "G. Gaslini" Institute , Genova , Italy
| | - Hervé M Blottière
- Micalis Institute, INRA, AgroParisTech, Université Paris-Saclay, JouyenJosas&MetaGenoPolis, INRA, Université Paris-Saclay , Jouyen Josas , France
| | - Gerard Clarke
- Department of Psychiatry and Neurobehavioural Science, School of Medicine, College of Medicine & Health, University College Cork, Cork, Ireland; APC Microbiome Ireland, University College Cork , Cork , Ireland
| | - Diego Albani
- Department of Neuroscience, IRCCS - Istituto di Ricerche Farmacologiche Mario Negri , Milan , Italy
| | | | - Marco Carotenuto
- Clinic of Child and Adolescent Neuropsychiatry, Department of Mental Health, Physical and Preventive Medicine, Università degli Studi della Campania 'Luigi Vanvitelli' , Napoli , Italy
| | - Annamaria Cattaneo
- Biological Psychiatry Unit, IRCCS Istituto Centro San Giovanni di Dio Fatebenefratelli , Brescia , Italy.,Stress, Psychiatry and Immunology Laboratory, Department of Psychological Medicine, Institute of Psychiatry , King's College , London
| | - Rita Citraro
- Science of Health Department, School of Medicine, University of Catanzaro , Catanzaro , Italy
| | - Cinzia Ferraris
- Human Nutrition and Eating Disorder Research Center, Department of Public Health, Experimental and Forensic Medicine University of Pavia , Pavia , Italy
| | - Francesca Ronchi
- Department forBiomedical Research, University of Bern , Bern , Switzerland
| | - Gaia Luongo
- Ordine dei Tecnologi Alimentari Campania e Lazio , Napoli , Italy
| | | | - Letizia Guiducci
- National Research Council, Institute of Clinical Physiology , Pisa , Italy
| | - Pietro Baldelli
- Department of Experimental Medicine, Section of Physiology, University of Genova , Genova , Italy
| | - Paola Iannetti
- Department of Pediatrics`, "Sapienza" University of Rome , Rome , Italy
| | - Sigrid Pedersen
- Department of Refractory Epilepsy, Division of Clinical Neuroscience, Oslo University Hospital , Oslo , Norway
| | - Andrea Petretto
- Laboratory of Mass Spectrometry - Core Facilities, Istituto Giannina Gaslini , Genova , Italy
| | - Stefania Provasi
- Biological Psychiatry Unit, IRCCS Istituto Centro San Giovanni di Dio Fatebenefratelli , Brescia , Italy
| | - Kaja Selmer
- Department of Research and Development, Division of Clinical Neuroscience, Oslo University Hospital, Osla, Norway and Department of Refractory Epilepsy, Division of Clinical Neuroscience, Oslo University Hospital , Osla , Norway
| | - Alberto Spalice
- Department of Experimental Medicine, Section of Physiology, University of Genova , Genova , Italy
| | - Anna Tagliabue
- Stress, Psychiatry and Immunology Laboratory, Department of Psychological Medicine, Institute of Psychiatry , King's College , London
| | - Alberto Verrotti
- Department of Pediatrics, University of L'Aquila , L'Aquila , Italy
| | - Nicola Segata
- Centre for Integrative Biology, University of Trento , Trento , Italy
| | - Jakob Zimmermann
- Human Nutrition and Eating Disorder Research Center, Department of Public Health, Experimental and Forensic Medicine University of Pavia , Pavia , Italy
| | - Carlo Minetti
- Paediatric Neurology and Muscular Diseases Unit, Department of Neurosciences, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health, University of Genoa, "G. Gaslini" Institute , Genova , Italy
| | | | - Carmen Giordano
- Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano , Milano , Italy
| | - Sanjay Sisodiya
- Department of Clinical and Experimental Epilepsy, UCL Institute of Neurology , Queen Square, London , UK
| | - Federico Zara
- Laboratory of Neurogenetics, Istituto Giannina Gaslini , Genova , Italy
| | - Emilio Russo
- Science of Health Department, School of Medicine, University of Catanzaro , Catanzaro , Italy
| | - Pasquale Striano
- Paediatric Neurology and Muscular Diseases Unit, Department of Neurosciences, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health, University of Genoa, "G. Gaslini" Institute , Genova , Italy
| |
Collapse
|
405
|
Zhao H, Gao D, Gao X. Rhubarb ameliorates cognitive dysfunction in a rat model of Alzheimer's disease through regulation of the intestinal microbiome. JOURNAL OF TRADITIONAL CHINESE MEDICAL SCIENCES 2019. [DOI: 10.1016/j.jtcms.2019.08.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
|
406
|
Lin D, Hutchison KE, Portillo S, Vegara V, Ellingson JM, Liu J, Krauter KS, Carroll-Portillo A, Calhoun VD. Association between the oral microbiome and brain resting state connectivity in smokers. Neuroimage 2019; 200:121-131. [PMID: 31201984 DOI: 10.1016/j.neuroimage.2019.06.023] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Revised: 06/11/2019] [Accepted: 06/11/2019] [Indexed: 10/26/2022] Open
Abstract
Recent studies have shown a critical role of the gastrointestinal microbiome in brain and behavior via the complex gut-microbiome-brain axis. However, the influence of the oral microbiome in neurological processes is much less studied, especially in response to the stimuli, such as smoking, within the oral microenvironment. Additionally, given the complex structural and functional networks in brain, our knowledge about the relationship between microbiome and brain function through specific brain circuits is still very limited. In this pilot study, we leveraged next generation sequencing for microbiome and functional neuroimaging technique to enable the delineation of microbiome-brain network links as well as their relationship to cigarette smoking. Thirty smokers and 30 age- and sex-matched nonsmokers were recruited for 16S sequencing of their oral microbial community. Among them, 56 subjects were scanned by resting-state functional magnetic resonance imaging to derive brain functional networks. Statistical analyses were performed to demonstrate the influence of smoking on the oral microbial composition, functional network connectivity, and the associations between microbial shifts and functional network connectivity alternations. Compared to nonsmokers, we found a significant decrease of beta diversity (P = 6 × 10-3) in smokers and identified several classes (Betaproteobacteria, Spirochaetia, Synergistia, and Mollicutes) with significant alterations in microbial abundance. Pathway analysis on the predicted KEGG pathways shows that the microbiota with altered abundance are mainly involved in pathways related to cell processes, DNA repair, immune system, and neurotransmitters signaling. One brain functional network connectivity component was identified to have a significant difference between smokers and nonsmokers (P = 0.032), mainly including connectivity between brain default network and other task-positive networks. This brain functional component was also significantly associated with smoking related microbiota, suggesting a correlated cross-individual pattern between smoking-induced oral microbiome dysbiosis and brain functional connectivity alternation, possibly involving immunological and neurotransmitter signaling pathways. This work is the first attempt to link oral microbiome and brain functional networks, and provides support for future work in characterizing the role of oral microbiome in mediating smoking effects on brain activity.
Collapse
Affiliation(s)
- Dongdong Lin
- The Mind Research Network, Albuquerque, NM, 87106, USA; Tri-institutional Center for Translational Research in Neuroimaging and Data Science (TReNDS) [Georgia State University, Georgia Institute of Technology, Emory University], Atlanta, GA, 30303, USA.
| | - Kent E Hutchison
- Department of Psychology and Neuroscience, University of Colorado Boulder, Boulder, 80309, USA
| | - Salvador Portillo
- University of New Mexico, Department of Electrical and Computer Engineering, Albuquerque, NM, 87106, USA
| | - Victor Vegara
- The Mind Research Network, Albuquerque, NM, 87106, USA; Tri-institutional Center for Translational Research in Neuroimaging and Data Science (TReNDS) [Georgia State University, Georgia Institute of Technology, Emory University], Atlanta, GA, 30303, USA
| | - Jarrod M Ellingson
- Department of Psychology and Neuroscience, University of Colorado Boulder, Boulder, 80309, USA
| | - Jingyu Liu
- The Mind Research Network, Albuquerque, NM, 87106, USA; University of New Mexico, Department of Electrical and Computer Engineering, Albuquerque, NM, 87106, USA; Tri-institutional Center for Translational Research in Neuroimaging and Data Science (TReNDS) [Georgia State University, Georgia Institute of Technology, Emory University], Atlanta, GA, 30303, USA
| | - Kenneth S Krauter
- Molecular,Cellular,and Developmental Biology, University of Colorado Boulder, Boulder, 80309, USA
| | - Amanda Carroll-Portillo
- University of New Mexico, Department of Electrical and Computer Engineering, Albuquerque, NM, 87106, USA
| | - Vince D Calhoun
- The Mind Research Network, Albuquerque, NM, 87106, USA; University of New Mexico, Department of Electrical and Computer Engineering, Albuquerque, NM, 87106, USA; Tri-institutional Center for Translational Research in Neuroimaging and Data Science (TReNDS) [Georgia State University, Georgia Institute of Technology, Emory University], Atlanta, GA, 30303, USA
| |
Collapse
|
407
|
Angelucci F, Cechova K, Amlerova J, Hort J. Antibiotics, gut microbiota, and Alzheimer's disease. J Neuroinflammation 2019; 16:108. [PMID: 31118068 PMCID: PMC6530014 DOI: 10.1186/s12974-019-1494-4] [Citation(s) in RCA: 233] [Impact Index Per Article: 46.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Accepted: 04/30/2019] [Indexed: 12/12/2022] Open
Abstract
Alzheimer's disease (AD) is a neurodegenerative disease whose various pathophysiological aspects are still being investigated. Recently, it has been hypothesized that AD may be associated with a dysbiosis of microbes in the intestine. In fact, the intestinal flora is able to influence the activity of the brain and cause its dysfunctions.Given the growing interest in this topic, the purpose of this review is to analyze the role of antibiotics in relation to the gut microbiota and AD. In the first part of the review, we briefly review the role of gut microbiota in the brain and the various theories supporting the hypothesis that dysbiosis can be associated with AD pathophysiology. In the second part, we analyze the possible role of antibiotics in these events. Antibiotics are normally used to remove or prevent bacterial colonization in the human body, without targeting specific types of bacteria. As a result, broad-spectrum antibiotics can greatly affect the composition of the gut microbiota, reduce its biodiversity, and delay colonization for a long period after administration. Thus, the action of antibiotics in AD could be wide and even opposite, depending on the type of antibiotic and on the specific role of the microbiome in AD pathogenesis.Alteration of the gut microbiota can induce changes in brain activity, which raise the possibility of therapeutic manipulation of the microbiome in AD and other neurological disorders. This field of research is currently undergoing great development, but therapeutic applications are still far away. Whether a therapeutic manipulation of gut microbiota in AD could be achieved using antibiotics is still not known. The future of antibiotics in AD depends on the research progresses in the role of gut bacteria. We must first understand how and when gut bacteria act to promote AD. Once the role of gut microbiota in AD is well established, one can think to induce modifications of the gut microbiota with the use of pre-, pro-, or antibiotics to produce therapeutic effects.
Collapse
Affiliation(s)
- Francesco Angelucci
- Memory Clinic, Department of Neurology, 2nd Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic
| | - Katerina Cechova
- Memory Clinic, Department of Neurology, 2nd Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic
| | - Jana Amlerova
- Memory Clinic, Department of Neurology, 2nd Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic
| | - Jakub Hort
- Memory Clinic, Department of Neurology, 2nd Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic
| |
Collapse
|
408
|
Sovijit WN, Sovijit WE, Pu S, Usuda K, Inoue R, Watanabe G, Yamaguchi H, Nagaoka K. Ovarian progesterone suppresses depression and anxiety-like behaviors by increasing the Lactobacillus population of gut microbiota in ovariectomized mice. Neurosci Res 2019; 168:76-82. [PMID: 31022413 DOI: 10.1016/j.neures.2019.04.005] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Revised: 04/15/2019] [Accepted: 04/16/2019] [Indexed: 12/19/2022]
Abstract
Depression and anxiety, which are severe symptoms during menopause, are caused by ceased ovarian activity and declined serum progesterone levels. Studies have demonstrated that gut microbiota can regulate brain function and change the microbiota composition during the perimenopause period. This study investigated whether progesterone affects depressant and anxious behaviors via gut microbiota. In ovariectomized (OVX) mice, treatment with progesterone improved depressive and anxious behaviors, and gut microbiota composition was significantly changed. In particular, increased Lactobacillus spp. were observed in these mice. Reduction of microbiota by antibiotic treatment abolished the effect of progesterone on depression and anxiety. In addition, administration of Lactobacillus (L.) reuteri that was increased by progesterone also reduced the depressant behavior in OVX mice, and BDNF gene expression was elevated by progesterone treatment and L. reuteri administration in the hippocampus. Moreover, we found that progesterone stimulated the growth of L. reuteri in vitro. In summary, our findings indicate that progesterone reduces depression and anxiety through changes in gut microbiota composition, particularly by increasing the Lactobacillus spp. population.
Collapse
Affiliation(s)
- Watcharin N Sovijit
- Laboratory of Veterinary Physiology, Department of Veterinary Medicine, Tokyo University of Agriculture and Technology, Japan
| | - Watcharee E Sovijit
- Laboratory of Veterinary Physiology, Department of Veterinary Medicine, Tokyo University of Agriculture and Technology, Japan
| | - Shaoxia Pu
- Laboratory of Veterinary Physiology, Department of Veterinary Medicine, Tokyo University of Agriculture and Technology, Japan
| | - Kento Usuda
- Laboratory of Veterinary Physiology, Department of Veterinary Medicine, Tokyo University of Agriculture and Technology, Japan
| | - Ryo Inoue
- Laboratory of Animal Science, Department of Agricultural and Life Sciences, Kyoto Prefectural University, Japan
| | - Gen Watanabe
- Laboratory of Veterinary Physiology, Department of Veterinary Medicine, Tokyo University of Agriculture and Technology, Japan
| | - Hirohito Yamaguchi
- Cancer research center, Qatar Biomedical Research Institute, Hamad Bin Khalifa University, Qatar
| | - Kentaro Nagaoka
- Laboratory of Veterinary Physiology, Department of Veterinary Medicine, Tokyo University of Agriculture and Technology, Japan.
| |
Collapse
|
409
|
Luca M, Di Mauro M, Di Mauro M, Luca A. Gut Microbiota in Alzheimer's Disease, Depression, and Type 2 Diabetes Mellitus: The Role of Oxidative Stress. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:4730539. [PMID: 31178961 PMCID: PMC6501164 DOI: 10.1155/2019/4730539] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/11/2018] [Accepted: 03/13/2019] [Indexed: 02/07/2023]
Abstract
Gut microbiota consists of over 100 trillion microorganisms including at least 1000 different species of bacteria and is crucially involved in physiological and pathophysiological processes occurring in the host. An imbalanced gastrointestinal ecosystem (dysbiosis) seems to be a contributor to the development and maintenance of several diseases, such as Alzheimer's disease, depression, and type 2 diabetes mellitus. Interestingly, the three disorders are frequently associated as demonstrated by the high comorbidity rates. In this review, we introduce gut microbiota and its role in both normal and pathological processes; then, we discuss the importance of the gut-brain axis as well as the role of oxidative stress and inflammation as mediators of the pathological processes in which dysbiosis is involved. Specific sections pertain the role of the altered gut microbiota in the pathogenesis of Alzheimer's disease, depression, and type 2 diabetes mellitus. The therapeutic implications of microbiota manipulation are briefly discussed. Finally, a conclusion comments on the possible role of dysbiosis as a common pathogenetic contributor (via oxidative stress and inflammation) shared by the three disorders.
Collapse
Affiliation(s)
- Maria Luca
- Department of Medical, Surgical Sciences and Advanced Technologies “GF Ingrassia”, University of Catania, Italy
| | - Maurizio Di Mauro
- Department of Clinical and Experimental Medicine, University of Catania, Italy
| | - Marco Di Mauro
- Department of Biomedical and Biotechnological Sciences, University of Catania, Italy
| | - Antonina Luca
- Department of Medical, Surgical Sciences and Advanced Technologies “GF Ingrassia”, University of Catania, Italy
| |
Collapse
|
410
|
Fang X, Tian P, Zhao X, Jiang C, Chen T. Neuroprotective effects of an engineered commensal bacterium in the 1‐methyl‐4‐phenyl‐1, 2, 3, 6‐tetrahydropyridine Parkinson disease mouse model via producing glucagon‐like peptide‐1. J Neurochem 2019; 150:441-452. [PMID: 30851189 DOI: 10.1111/jnc.14694] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Revised: 11/28/2018] [Accepted: 03/05/2019] [Indexed: 12/31/2022]
Affiliation(s)
- Xin Fang
- Department of Neurology The First Affiliated Hospital of Nanchang University Nanchang China
| | - Puyuan Tian
- Institute of Translational Medicine Nanchang University Nanchang Jiangxi PR China
| | - Xiaoxiao Zhao
- Institute of Translational Medicine Nanchang University Nanchang Jiangxi PR China
| | - Chunling Jiang
- Department of Radiation Oncology Jiangxi Cancer Hospital Nanchang Jiangxi PR China
| | - Tingtao Chen
- Institute of Translational Medicine Nanchang University Nanchang Jiangxi PR China
| |
Collapse
|
411
|
Abstract
Alterations in the human gut microbiota play an important role in disease pathogenesis. Although next-generation sequencing has provided observational evidence linking shifts in gut microbiota composition to alterations in the human host, underlying mechanisms remain elusive. Metabolites generated within complex microbial communities and at the crossroads with host cells may be able to explain the impact of the gut microbiome on human homeostasis. Emerging technologies including novel culturing protocols, microfluidic systems, engineered organoids, and single-cell imaging approaches are providing new perspectives from which the gut microbiome can be studied paving the way to new diagnostic markers and personalized therapeutic interventions.
Collapse
Affiliation(s)
- Paola Brun
- Department of Molecular Medicine, University of Padova, Padova, Italy
| |
Collapse
|
412
|
Roy Sarkar S, Banerjee S. Gut microbiota in neurodegenerative disorders. J Neuroimmunol 2019; 328:98-104. [DOI: 10.1016/j.jneuroim.2019.01.004] [Citation(s) in RCA: 136] [Impact Index Per Article: 27.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Revised: 12/05/2018] [Accepted: 01/08/2019] [Indexed: 02/06/2023]
|
413
|
Gut microbiome-based secondary metabolite biosynthetic gene clusters detection in Parkinson’s disease. Neurosci Lett 2019; 696:93-98. [DOI: 10.1016/j.neulet.2018.12.021] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Revised: 11/11/2018] [Accepted: 12/15/2018] [Indexed: 12/15/2022]
|
414
|
O'Grady J, O'Connor EM, Shanahan F. Review article: dietary fibre in the era of microbiome science. Aliment Pharmacol Ther 2019; 49:506-515. [PMID: 30746776 DOI: 10.1111/apt.15129] [Citation(s) in RCA: 83] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Revised: 11/27/2018] [Accepted: 12/14/2018] [Indexed: 12/12/2022]
Abstract
BACKGROUND Explanations for the health benefits of dietary fibre have, in the past, been inconsistent and studies of the physiological effects of dietary fibre were, perhaps, directed at the wrong read-outs. Confounding factors included a failure to appreciate the molecular diversity and varied properties of fibre-types and the role of fibre as a substrate for microbial metabolism in the gut. AIM To present a modern perspective on fibre science and to encourage clinicians to re-consider the health impact of dietary fibre and how best to approach adjustments in dietary consumption. METHODS This perspective is drawn selectively from recent microbiome science; no attempt was made to perform an exhaustive review of all articles related to every aspect of dietary fibre. RESULTS Advances in microbiome science have revealed not only the functional impact of dietary fibre on the composition and function of the microbiota but have also demonstrated the physiologic responses to microbial-derived metabolites from fibre digestion. Moreover, studies have shown the personalised nature of host responses to dietary fibre intervention, with outcomes being dependent on individual pre-treatment gut ecology. CONCLUSIONS The physical properties of dietary fibres are important for homeostasis within the gut, but the predominant health benefits extend beyond the gut to enhanced metabolic welfare, including protection against obesity and related metabolic diseases. Fibre is a form of functional food joining a growing list of examples of diet-microbe-host interactions which link microbe-host metabolic and immune cascades.
Collapse
Affiliation(s)
- John O'Grady
- APC Microbiome Ireland, University College Cork, National University of Ireland, Cork, Ireland.,Department of Medicine, University College Cork, National University of Ireland, Cork, Ireland
| | - Eibhlís M O'Connor
- APC Microbiome Ireland, University College Cork, National University of Ireland, Cork, Ireland.,Department of Biological Sciences and Health Research Institute, University of Limerick, Limerick, Ireland
| | - Fergus Shanahan
- APC Microbiome Ireland, University College Cork, National University of Ireland, Cork, Ireland.,Department of Medicine, University College Cork, National University of Ireland, Cork, Ireland
| |
Collapse
|
415
|
The Relationship between Platelet Count and Host Gut Microbiota: A Population-Based Retrospective Cross-Sectional Study. J Clin Med 2019; 8:jcm8020230. [PMID: 30744195 PMCID: PMC6406547 DOI: 10.3390/jcm8020230] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Revised: 02/07/2019] [Accepted: 02/07/2019] [Indexed: 01/19/2023] Open
Abstract
Platelet count reflects the severity and prognosis of multiple diseases. Additionally, alterations in gut microbiota have been linked to several chronic diseases. The purpose of this study was to investigate the association between gut microbiota and platelet count. We selected 1268 subjects with fecal 16S RNA gene sequencing data from a Healthcare Screening Center cohort. Based on the third quartile of platelets (277 × 109/L), we compared the gut microbiota between the upper quartile (n = 321) and lower three quartiles groups (n = 947). The upper quartile group had lower alpha diversity based on observed amplicon sequence variants (q = 0.004) and phylogenetic index (q < 0.001) than the lower three quartiles group. Significant differences were also found in the weighted UniFrac distance (q = 0.001) and Jaccard dissimilarity (q = 0.047) beta diversity measures between the two groups. Compared with the lower three quartiles group, the upper quartile group exhibited decreased relative abundances of the genus Faecalibacterium, which was also inversely correlated with the platelet count. Increased platelet count was associated with reduced diversity in gut microbiota and lower abundances of Faecalibacterium with beneficial gut bacteria spices F. prausnitzii, suggesting that an increased platelet count, even within normal range, may adversely affect gut microbial diversity and composition.
Collapse
|
416
|
Wang H, Yan Y, Yi X, Duan Y, Wang J, Li S, Luo L, Huang T, Inglis B, Li X, Ji W, Tan T, Si W. Histopathological Features and Composition of Gut Microbiota in Rhesus Monkey of Alcoholic Liver Disease. Front Microbiol 2019; 10:165. [PMID: 30800107 PMCID: PMC6375900 DOI: 10.3389/fmicb.2019.00165] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Accepted: 01/22/2019] [Indexed: 12/25/2022] Open
Abstract
Alcohol-induced chronic liver disease (ALD) is becoming the most common liver disease in the world. However, there are no effective, universally accepted therapies for ALD. The etiology of ALD remains blurry so far. Historical evidence has demonstrated a link between the liver and gut microbiota. But it is difficult to distinguish the effect of gut microbiota changes caused by alcohol consumption in humans since the microbiota change detected in humans is complicated by diet and environmental factors. Due to the genetic, physiological, metabolic, and behavioral similarities to humans, the rhesus monkey provides excellent translational validity in preclinical studies, and the diet and environmental conditions can be controlled well in rhesus monkey. In our study, we explored the relationship between ALD and the gut microbiome in the rhesus monkeys with alcoholic liver steatosis. Our results showed that there was a change of the bacterial community structure in monkeys with ALD. Differences of the relative abundances of gut microbiota at phylum, order, family, genus, and species levels were observed between control monkeys and monkeys with ALD, and different pathways enriched in the monkeys with ALD were identified by metagenomic function analysis. Firmicutes, Proteobacteria, Verrucomicrobia tended to increase whereas Bacteroidetes and Actinobacteria decreased in the fecal microbiota of ALD group compared to the control group. Lactobacillales and Lactobacillus significantly decreased in ALD monkeys compared with normal monkeys, Streptococcus was lower in the ALD group compared with the control group. The non-human primate model of ALD will be useful for exploration of the microbiome markers as diagnosis and potentially prognosis for ALD. The ALD model will benefit the development of new therapeutic procedures for treating ALD and provide safety and efficacy evaluation for clinical application.
Collapse
Affiliation(s)
- Hong Wang
- Yunnan Key Laboratory of Primate Biomedical Research, Institute of Primate Translational Medicine, Kunming University of Science and Technology, Kunming, China
| | - Yaping Yan
- Yunnan Key Laboratory of Primate Biomedical Research, Institute of Primate Translational Medicine, Kunming University of Science and Technology, Kunming, China
| | - Xiaoyan Yi
- Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Yanchao Duan
- Yunnan Key Laboratory of Primate Biomedical Research, Institute of Primate Translational Medicine, Kunming University of Science and Technology, Kunming, China
| | - Junfeng Wang
- Department of Hepatic and Bile Duct Surgery, The First People's Hospital of Yunnan Province, Kunming, China
| | - Shanshan Li
- Yunnan Key Laboratory of Primate Biomedical Research, Institute of Primate Translational Medicine, Kunming University of Science and Technology, Kunming, China
| | - Lilin Luo
- Department of Pathology, The First People's Hospital of Yunnan Province, Kunming, China
| | - Tianzhuang Huang
- Yunnan Key Laboratory of Primate Biomedical Research, Institute of Primate Translational Medicine, Kunming University of Science and Technology, Kunming, China
| | - Briauna Inglis
- Yunnan Key Laboratory of Primate Biomedical Research, Institute of Primate Translational Medicine, Kunming University of Science and Technology, Kunming, China
| | - Xi Li
- Yunnan Key Laboratory of Primate Biomedical Research, Institute of Primate Translational Medicine, Kunming University of Science and Technology, Kunming, China
| | - Weizhi Ji
- Yunnan Key Laboratory of Primate Biomedical Research, Institute of Primate Translational Medicine, Kunming University of Science and Technology, Kunming, China
| | - Tao Tan
- Yunnan Key Laboratory of Primate Biomedical Research, Institute of Primate Translational Medicine, Kunming University of Science and Technology, Kunming, China
| | - Wei Si
- Yunnan Key Laboratory of Primate Biomedical Research, Institute of Primate Translational Medicine, Kunming University of Science and Technology, Kunming, China
| |
Collapse
|
417
|
Kowalski K, Mulak A. Brain-Gut-Microbiota Axis in Alzheimer's Disease. J Neurogastroenterol Motil 2019; 25:48-60. [PMID: 30646475 PMCID: PMC6326209 DOI: 10.5056/jnm18087] [Citation(s) in RCA: 453] [Impact Index Per Article: 90.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Revised: 08/21/2018] [Accepted: 09/16/2018] [Indexed: 12/11/2022] Open
Abstract
Disturbances along the brain-gut-microbiota axis may significantly contribute to the pathogenesis of neurodegenerative disorders. Alzheimer's disease (AD) is the most frequent cause of dementia characterized by a progressive decline in cognitive function associated with the formation of amyloid beta (Aβ) plaques and neurofibrillary tangles. Alterations in the gut microbiota composition induce increased permeability of the gut barrier and immune activation leading to systemic inflammation, which in turn may impair the blood-brain barrier and promote neuroinflammation, neural injury, and ultimately neurodegeneration. Recently, Aβ has also been recognized as an antimicrobial peptide participating in the innate immune response. However, in the dysregulated state, Aβ may reveal harmful properties. Importantly, bacterial amyloids through molecular mimicry may elicit cross-seeding of misfolding and induce microglial priming. The Aβ seeding and propagation may occur at different levels of the brain-gut-microbiota axis. The potential mechanisms of amyloid spreading include neuron-to-neuron or distal neuron spreading, direct blood-brain barrier crossing or via other cells as astrocytes, fibroblasts, microglia, and immune system cells. A growing body of experimental and clinical data confirms a key role of gut dysbiosis and gut microbiota-host interactions in neurodegeneration. The convergence of gut-derived inflammatory response together with aging and poor diet in the elderly contribute to the pathogenesis of AD. Modification of the gut microbiota composition by food-based therapy or by probiotic supplementation may create new preventive and therapeutic options in AD.
Collapse
Affiliation(s)
- Karol Kowalski
- Department of Gastroenterology and Hepatology, Wroclaw Medical University, Poland
| | - Agata Mulak
- Department of Gastroenterology and Hepatology, Wroclaw Medical University, Poland
| |
Collapse
|
418
|
Abstract
PURPOSE OF REVIEW To critically review recent (past 3 years) literature on the definition, diagnosis, and management of small intestinal bacterial overgrowth (SIBO). RECENT FINDINGS While various series continue to illustrate the occurrence of SIBO in disease states where well-known risk factors for its occurrence are present (hypochlorhydria, disorders of intestinal structure or motor function, pancreatic insufficiency, and chronic liver disease, for example), the current challenge is in defining the limits of SIBO. Is SIBO truly common among those with "functional" gastrointestinal symptoms where there is no evidence of maldigestion or malabsorption; the original hallmarks of SIBO? Our attempts to address this question continue to be hampered by the limitations of our diagnostic tool kit. There is hope-the application of modern molecular techniques to the study of the small intestinal microbiome, together with some innovative sampling techniques, such as real-time intestinal gas sampling, may soon allow us to truly define the spectrum of SIBO. SIBO, once removed from its original confines as a cause of malabsorption syndrome, has proven to be an elusive and moving target. Only the most rigorous studies employing validated methodologies will finally corral this mysterious entity.
Collapse
Affiliation(s)
- Eamonn M M Quigley
- Lynda K and David M Underwood Center for Digestive Disorders, Division of Gastroenterology and Hepatology, Houston Methodist Hospital, Weill Cornell Medical College, Houston, TX, USA.
- Houston Methodist Gastroenterology Associates, 6550 Fannin St, SM 1201, Houston, TX, 77030, USA.
| |
Collapse
|
419
|
Quigley EMM. Prebiotics and Probiotics in Digestive Health. Clin Gastroenterol Hepatol 2019; 17:333-344. [PMID: 30267869 DOI: 10.1016/j.cgh.2018.09.028] [Citation(s) in RCA: 172] [Impact Index Per Article: 34.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Revised: 09/19/2018] [Accepted: 09/20/2018] [Indexed: 02/07/2023]
Abstract
As the importance of the gut microbiota in health and disease is increasingly recognized interest in interventions that can modulate the microbiota and its interactions with its host has soared. Apart from diet, prebiotics and probiotics represent the most commonly used substances taken in an effort to sustain a healthy microbiome or restore balance when it is believed bacterial homeostasis has been disturbed in disease. While a considerable volume of basic science attests to the ability of various prebiotic molecules and probiotic strains to beneficially influence host immune responses, metabolic processes and neuro-endocrine pathways, the evidence base from human studies leaves much to be desired. This translational gap owes much to the manner in which this sector is regulated but also speaks to the challenges that confront the investigator who seeks to explore microbiota modulation in either healthy populations or those who suffer from common digestive ailments. For many products marketed as probiotics, some of the most fundamental issues relating to quality control, such as characterization, formulation, viability safety are scarcely addressed.
Collapse
Affiliation(s)
- Eamonn M M Quigley
- Division of Gastroenterology and Hepatology, Lynda K. and David M. Underwood Center for Digestive Disorders, Houston Methodist Hospital and Weill Cornell Medical College, Houston, Texas.
| |
Collapse
|
420
|
Wu XM, Tan RX. Interaction between gut microbiota and ethnomedicine constituents. Nat Prod Rep 2019; 36:788-809. [DOI: 10.1039/c8np00041g] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
This highlight reviews the interaction processes between gut microbiota and ethnomedicine constituents, which may conceptualize future therapeutic strategies.
Collapse
Affiliation(s)
- Xue Ming Wu
- State Key Laboratory Cultivation Base for TCM Quality and Efficacy
- Nanjing University of Chinese Medicine
- Nanjing
- China
| | - Ren Xiang Tan
- State Key Laboratory Cultivation Base for TCM Quality and Efficacy
- Nanjing University of Chinese Medicine
- Nanjing
- China
- State Key Laboratory of Pharmaceutical Biotechnology
| |
Collapse
|
421
|
Liu F, Horton-Sparks K, Hull V, Li RW, Martínez-Cerdeño V. The valproic acid rat model of autism presents with gut bacterial dysbiosis similar to that in human autism. Mol Autism 2018; 9:61. [PMID: 30555669 PMCID: PMC6288876 DOI: 10.1186/s13229-018-0251-3] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Accepted: 11/26/2018] [Indexed: 02/07/2023] Open
Abstract
Background Gut microbiota has the capacity to impact the regular function of the brain, which can in turn affect the composition of microbiota. Autism spectrum disorder (ASD) patients suffer from gastrointestinal problems and experience changes in gut microbiota; however, it is not yet clear whether the change in the microbiota associated with ASD is a cause or a consequence of the disease. Methods We have investigated the species richness and microbial composition in a valproic acid (VPA)-induced rat model autism. Fecal samples from the rectum were collected at necropsy, microbial total DNA was extracted, 16 rRNA genes sequenced using Illumina, and the global microbial co-occurrence network was constructed using a random matrix theory-based pipeline. Collected rat microbiome data were compared to available data derived from cases of autism. Results We found that VPA administration during pregnancy reduced fecal microbial richness, changed the gut microbial composition, and altered the metabolite potential of the fecal microbial community in a pattern similar to that seen in patients with ASD. However, the global network property and network composition as well as microbial co-occurrence patterns were largely preserved in the offspring of rats exposed to prenatal administration of VPA. Conclusions Our data on the microbiota of the VPA rat model of autism indicate that this model, in addition to behaviorally and anatomically mimicking the autistic brain as previously shown, also mimics the microbiome features of autism, making it one of the best-suited rodent models for the study of autism and ASD.
Collapse
Affiliation(s)
- Fang Liu
- College of Food Science and Engineering, Ocean University of China, Qingdao, China
| | - Kayla Horton-Sparks
- Institute for Pediatric Regenerative Medicine and Shriners Hospitals for Children Northern California, 2504 Stockton Blvd, Sacramento, CA 95817 USA
| | - Vanessa Hull
- Institute for Pediatric Regenerative Medicine and Shriners Hospitals for Children Northern California, 2504 Stockton Blvd, Sacramento, CA 95817 USA
| | - Robert W. Li
- United States Department of Agriculture, Agriculture Research Service (USDA-ARS), Animal Genomics and Improvement Laboratory, Beltsville, MD USA
| | - Verónica Martínez-Cerdeño
- Institute for Pediatric Regenerative Medicine and Shriners Hospitals for Children Northern California, 2504 Stockton Blvd, Sacramento, CA 95817 USA
- Department of Pathology and Laboratory Medicine, UC Davis School of Medicine, Sacramento, CA USA
- MIND Institute, Sacramento, CA USA
| |
Collapse
|
422
|
Kujawska M, Jodynis-Liebert J. What is the Evidence That Parkinson's Disease is a Prion Disorder, Which Originates in the Gut? Int J Mol Sci 2018; 19:3573. [PMID: 30424585 PMCID: PMC6274907 DOI: 10.3390/ijms19113573] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Revised: 11/07/2018] [Accepted: 11/09/2018] [Indexed: 12/21/2022] Open
Abstract
Parkinson's disease (PD) is a neurodegenerative disorder resulting from degeneration of dopaminergic neurons in the substantia nigra pars compacta (SNpc). PD is characterized by motor dysfunctions as well as gastrointestinal symptoms and mental impairment. The pathological hallmark of PD is an accumulation of misfolded α-synuclein aggregates within the brain. The etiology of PD and related synucleinopathy is poorly understood, but recently, the hypothesis that α-synuclein pathology spreads in a prion-like fashion originating in the gut has gained much scientific attention. A crucial clue was the appearance of constipation before the onset of motor symptoms, gut dysbiosis and synucleinopathy in PD patients. Another line of evidence, demonstrating accumulation of α-synuclein within the peripheral autonomic nervous system (PANS), including the enteric nervous system (ENS), and the dorsal motor nucleus of the vagus (DMV) support the concept that α-synuclein can spread from the ENS to the brain by the vagus nerve. The decreased risk of PD following truncal vagotomy supports this. The convincing evidence of the prion-like behavior of α-synuclein came from postmortem observations that pathological α-synuclein inclusions appeared in healthy grafted neurons. In this review, we summarize the available data from human subjects' research and animal experiments, which seem to be the most suggestive for explaining the hypotheses.
Collapse
Affiliation(s)
- Małgorzata Kujawska
- Department of Toxicology, Poznan University of Medical Sciences, 30 Dojazd Str., 60-631 Poznań, Poland.
| | - Jadwiga Jodynis-Liebert
- Department of Toxicology, Poznan University of Medical Sciences, 30 Dojazd Str., 60-631 Poznań, Poland.
| |
Collapse
|
423
|
Abstract
PURPOSE OF REVIEW During the past 25 years, there has been an explosion of information regarding the occurrence of gastrointestinal dysfunction in Parkinson's disease. In this review, the clinical features of gastrointestinal dysfunction in Parkinson's disease will be described and information regarding the potential role of the enteric nervous system and the gut microbiome in the genesis of Parkinson's disease will be addressed. RECENT FINDINGS Recognition is growing regarding the role that gastroparesis and small intestinal dysfunction may play in Parkinson's disease, especially with regard to erratic responses to anti-Parkinson medication. The presence of enteric nervous system involvement in Parkinson's disease is now well established, but whether the enteric nervous system is the starting point for Parkinson's disease pathology remains a source of debate. The potential role of the gut microbiome also is beginning to emerge. Gastrointestinal dysfunction is a prominent nonmotor feature of Parkinson's disease and dysfunction can be found along the entire length of the gastrointestinal tract. The enteric nervous system is clearly involved in Parkinson's disease. Whether it is the initial source of pathology is still a source of controversy. There also is growing recognition of the role that the gut microbiome may play in Parkinson's disease, but much more research is needed to fully assess this aspect of the disorder.
Collapse
Affiliation(s)
- Ronald F Pfeiffer
- Department of Neurology, Oregon Health and Science University, Portland, OR, USA.
| |
Collapse
|
424
|
Liang S, Wu X, Jin F. Gut-Brain Psychology: Rethinking Psychology From the Microbiota-Gut-Brain Axis. Front Integr Neurosci 2018; 12:33. [PMID: 30271330 PMCID: PMC6142822 DOI: 10.3389/fnint.2018.00033] [Citation(s) in RCA: 137] [Impact Index Per Article: 22.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Accepted: 07/19/2018] [Indexed: 12/12/2022] Open
Abstract
Mental disorders and neurological diseases are becoming a rapidly increasing medical burden. Although extensive studies have been conducted, the progress in developing effective therapies for these diseases has still been slow. The current dilemma reminds us that the human being is a superorganism. Only when we take the human self and its partner microbiota into consideration at the same time, can we better understand these diseases. Over the last few centuries, the partner microbiota has experienced tremendous change, much more than human genes, because of the modern transformations in diet, lifestyle, medical care, and so on, parallel to the modern epidemiological transition. Existing research indicates that gut microbiota plays an important role in this transition. According to gut-brain psychology, the gut microbiota is a crucial part of the gut-brain network, and it communicates with the brain via the microbiota-gut-brain axis. The gut microbiota almost develops synchronously with the gut-brain, brain, and mind. The gut microbiota influences various normal mental processes and mental phenomena, and is involved in the pathophysiology of numerous mental and neurological diseases. Targeting the microbiota in therapy for these diseases is a promising approach that is supported by three theories: the gut microbiota hypothesis, the "old friend" hypothesis, and the leaky gut theory. The effects of gut microbiota on the brain and behavior are fulfilled by the microbiota-gut-brain axis, which is mainly composed of the nervous pathway, endocrine pathway, and immune pathway. Undoubtedly, gut-brain psychology will bring great enhancement to psychology, neuroscience, and psychiatry. Various microbiota-improving methods including fecal microbiota transplantation, probiotics, prebiotics, a healthy diet, and healthy lifestyle have shown the capability to promote the function of the gut-brain, microbiota-gut-brain axis, and brain. It will be possible to harness the gut microbiota to improve brain and mental health and prevent and treat related diseases in the future.
Collapse
Affiliation(s)
- Shan Liang
- Key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of Sciences, Beijing, China
| | - Xiaoli Wu
- Key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Feng Jin
- Key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of Sciences, Beijing, China
| |
Collapse
|
425
|
Inoue T, Kobayashi Y, Mori N, Sakagawa M, Xiao JZ, Moritani T, Sakane N, Nagai N. Effect of combined bifidobacteria supplementation and resistance training on cognitive function, body composition and bowel habits of healthy elderly subjects. Benef Microbes 2018; 9:843-853. [PMID: 30198326 DOI: 10.3920/bm2017.0193] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Physical exercise exerts favourable effects on brain health and quality of life of the elderly; some of these positive health effects are induced by the modulation of microbiota composition. We therefore conducted a randomised, double blind, placebo-controlled trial that assessed whether a combination of Bifidobacterium spp. supplementation and moderate resistance training improved the cognitive function and other health-related parameters in healthy elderly subjects. Over a 12-week period, 38 participants (66-78 years) underwent resistance training and were assigned to the probiotic Bifidobacterium supplementation (n=20; 1.25×1010 cfu each of Bifidobacterium longum subsp. longum BB536, B. longum subsp. infantis M-63, Bifidobacterium breve M-16V and B. breve B-3) or the placebo (n=18) group. At baseline and at 12 weeks, we assessed the cognitive function, using the Japanese version of the Montreal Cognitive Assessment instrument (MoCA-J); modified flanker task scores; depression-anxiety scores; body composition; and bowel habits. At 12 weeks, the MoCA-J scores showed a significant increase in both the groups, while the flanker task scores of the probiotic group increased more significantly than those of the placebo group (0.35±0.9 vs -0.29±1.1, P=0.056). Only the probiotic group showed a significant decrease in the depression-anxiety scores (5.2±6.3 to 3.4±5.5, P=0.012) and body mass index (24.0±2.8 to 23.5±2.8 kg/m2, P<0.001), with a significant increase in the defecation frequency (5.3±2.3 to 6.4±2.3 times/5 days, P=0.023) at 12 weeks. Thus, in healthy elderly subjects, combined probiotic bifidobacteria supplementation and moderate resistance training may improve the mental condition, body weight and bowel movement frequency.
Collapse
Affiliation(s)
- T Inoue
- 1 School of Human Science and Environment, University of Hyogo, Hyogo 6700092, Japan
| | - Y Kobayashi
- 2 Next Generation Science Institute, Morinaga Milk Industry Co., Ltd., Kanagawa 2528583, Japan
| | - N Mori
- 1 School of Human Science and Environment, University of Hyogo, Hyogo 6700092, Japan
| | - M Sakagawa
- 1 School of Human Science and Environment, University of Hyogo, Hyogo 6700092, Japan
| | - J-Z Xiao
- 2 Next Generation Science Institute, Morinaga Milk Industry Co., Ltd., Kanagawa 2528583, Japan
| | - T Moritani
- 3 Kyoto Sangyo University, Kyoto 6038555, Japan
| | - N Sakane
- 4 Division of Preventive Medicine, Clinical Research Institute for Endocrine and Metabolic Disease, National Hospital Organization, Kyoto Medical Center, Kyoto 6128555, Japan
| | - N Nagai
- 1 School of Human Science and Environment, University of Hyogo, Hyogo 6700092, Japan
| |
Collapse
|
426
|
Pellegrini C, Antonioli L, Colucci R, Blandizzi C, Fornai M. Interplay among gut microbiota, intestinal mucosal barrier and enteric neuro-immune system: a common path to neurodegenerative diseases? Acta Neuropathol 2018; 136:345-361. [PMID: 29797112 DOI: 10.1007/s00401-018-1856-5] [Citation(s) in RCA: 167] [Impact Index Per Article: 27.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Revised: 04/27/2018] [Accepted: 04/29/2018] [Indexed: 12/14/2022]
Abstract
Neurological diseases, such as Parkinson's disease, Alzheimer's disease, amyotrophic lateral sclerosis (ALS) and multiple sclerosis, are often associated with functional gastrointestinal disorders. These gastrointestinal disturbances may occur at all stages of the neurodegenerative diseases, to such an extent that they are now considered an integral part of their clinical picture. Several lines of evidence support the contention that, in central neurodegenerative diseases, changes in gut microbiota and enteric neuro-immune system alterations could contribute to gastrointesinal dysfunctions as well as initiation and upward spreading of the neurologic disorder. The present review has been intended to provide a comprehensive overview of the available knowledge on the role played by enteric microbiota, mucosal immune system and enteric nervous system, considered as an integrated network, in the pathophysiology of the main neurological diseases known to be associated with intestinal disturbances. In addition, based on current human and pre-clinical evidence, our intent was to critically discuss whether changes in the dynamic interplay between gut microbiota, intestinal epithelial barrier and enteric neuro-immune system are a consequence of the central neurodegeneration or might represent the starting point of the neurodegenerative process. Special attention has been paid also to discuss whether alterations of the enteric bacterial-neuro-immune network could represent a common path driving the onset of the main neurodegenerative diseases, even though each disease displays its own distinct clinical features.
Collapse
Affiliation(s)
- Carolina Pellegrini
- Unit of Pharmacology and Pharmacovigilance, Department of Clinical and Experimental Medicine, University of Pisa, Via Roma 55, 56126, Pisa, Italy.
| | - Luca Antonioli
- Unit of Pharmacology and Pharmacovigilance, Department of Clinical and Experimental Medicine, University of Pisa, Via Roma 55, 56126, Pisa, Italy
| | - Rocchina Colucci
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, 35131, Padova, Italy
| | - Corrado Blandizzi
- Unit of Pharmacology and Pharmacovigilance, Department of Clinical and Experimental Medicine, University of Pisa, Via Roma 55, 56126, Pisa, Italy
| | - Matteo Fornai
- Unit of Pharmacology and Pharmacovigilance, Department of Clinical and Experimental Medicine, University of Pisa, Via Roma 55, 56126, Pisa, Italy
| |
Collapse
|
427
|
Farowski F, Els G, Tsakmaklis A, Higgins PG, Kahlert CR, Stein-Thoeringer CK, Bobardt JS, Dettmer-Wilde K, Oefner PJ, Vehreschild JJ, Vehreschild MJ. Assessment of urinary 3-indoxyl sulfate as a marker for gut microbiota diversity and abundance of Clostridiales. Gut Microbes 2018; 10:133-141. [PMID: 30118620 PMCID: PMC6546351 DOI: 10.1080/19490976.2018.1502536] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2018] [Revised: 06/04/2018] [Accepted: 07/09/2018] [Indexed: 02/03/2023] Open
Abstract
OBJECTIVES After allogeneic hematopoietic stem cell transplantation (allo-HCT), urinary levels of 3-indoxyl sulfate (3-IS) correlate with the relative abundance of bacteria from the class Clostridia (RAC), and antibiotic treatment is considered the major determinant of this outcome. A high RAC has been associated with favorable outcome after allo-HCT and protection from Clostridium difficile infection (CDI). We assessed correlations between alpha diversity, RAC and urinary 3-IS levels in a non-allo-HCT clinical cohort of antibiotic treated patients to further explore 3-IS as a biomarker of reduced diversity and predisposition to CDI. METHODS Fecal and urinary specimens were analyzed from 40 non-allo-HCT hospitalized patients before and 9 ± 2 days after initiation of intravenous antibiotic treatment. Fecal microbiota were analyzed by 16s RNA sequencing and urinary 3-IS was analyzed by liquid chromatography-tandem mass spectrometry. Receiver operating characteristic (ROC) analysis was performed to assess the predictive value of 3-IS. RESULTS At a RAC cutoff of <30%, the binary logarithm of 3-IS (medium 3-IS: ≤2.5; high 3-IS: >2.5) was predictive with an accuracy of 82% (negative predictive value: 87%, positive predictive value 67%). Accuracy was improved by combing antibiotic history with 3-IS levels (accuracy 89%, npv 88%, ppv 92%). CONCLUSION In conjunction with patient antibiotic history, 3-IS is a candidate marker to predict RAC.
Collapse
Affiliation(s)
- Fedja Farowski
- Department I of Internal Medicine, University Hospital of Cologne, Cologne, Germany
- German Centre for Infection Research (DZIF), partner site Bonn-Cologne, Cologne, Germany
| | - Gregor Els
- Department I of Internal Medicine, University Hospital of Cologne, Cologne, Germany
| | - Anastasia Tsakmaklis
- Department I of Internal Medicine, University Hospital of Cologne, Cologne, Germany
| | - Paul G. Higgins
- Institute for Medical Microbiology, Immunology and Hygiene, University of Cologne, Cologne, Germany
| | - Christian R. Kahlert
- Clinic of Infectious Diseases and Hospital Epidemiology, Kantonsspital St. Gallen, St. Gallen, Switzerland
- Infectious Diseases and Hospital Epidemiology, Children’s Hospital of Eastern Switzerland, St. Gallen, Switzerland
| | - Christoph K. Stein-Thoeringer
- Clinic und Polyclinic for Internal Medicine II, Klinikum rechts der Isar, Technical University Munich, Munich, Germany
- Immunology program, Memorial Sloan Kettering Cancer Center, New York, USA
| | - Johanna S. Bobardt
- Clinic und Polyclinic for Internal Medicine II, Klinikum rechts der Isar, Technical University Munich, Munich, Germany
| | - Katja Dettmer-Wilde
- Institute of Functional Genomics, University of Regensburg, Regensburg, Germany
| | - Peter J. Oefner
- Institute of Functional Genomics, University of Regensburg, Regensburg, Germany
| | - Jörg Janne Vehreschild
- Department I of Internal Medicine, University Hospital of Cologne, Cologne, Germany
- German Centre for Infection Research (DZIF), partner site Bonn-Cologne, Cologne, Germany
| | - Maria J.G.T. Vehreschild
- Department I of Internal Medicine, University Hospital of Cologne, Cologne, Germany
- German Centre for Infection Research (DZIF), partner site Bonn-Cologne, Cologne, Germany
| |
Collapse
|
428
|
Exploring Bacteroidetes: Metabolic key points and immunological tricks of our gut commensals. Dig Liver Dis 2018; 50:635-639. [PMID: 29650468 DOI: 10.1016/j.dld.2018.03.016] [Citation(s) in RCA: 103] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2017] [Revised: 03/10/2018] [Accepted: 03/12/2018] [Indexed: 12/11/2022]
Abstract
Bacteroidetes are the largest phylum of Gram-negative bacteria inhabiting our gastrointestinal tract and are considered the leading players of the healthy state and sophisticated homeostasis safeguarded by gut microbiota. Furthermore, specific roles have been attributed to some Bacteroidetes genera in the development of immune dysregulation, systemic disease such as metabolic syndrome and also neurological disorders. Glycoproteins secretion, short fatty acids imbalance, toxins production and molecular mimicry are only a part of the functions exerted by these commensals interacting with the host. The aim of this review is to summarize the current knowledge on the recognized role of Bacteroidetes in physiological functions and pathological networks in order to define the needs for future research and clarify the potential role for targeted microbial therapies.
Collapse
|
429
|
Protein Hydrolysates' Absorption Characteristics in the Dynamic Small Intestine In Vivo. Molecules 2018; 23:molecules23071591. [PMID: 29966316 PMCID: PMC6099499 DOI: 10.3390/molecules23071591] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Revised: 06/14/2018] [Accepted: 06/26/2018] [Indexed: 12/23/2022] Open
Abstract
Background: Dietary proteins are known for their wide range of nutritional, functional and biological properties. Although the total amount of proteins may be obtained from mixtures, its “availability” for absorption in the gut is in many cases quite uncertain or even varies for the same food depending on processing conditions, the presence of other components, and so on. Methods: To obtain accurate protein hydrolysate absorption data, we have developed a small intestine model (SIM) to test them. Results: The results indicated that the protein hydrolysates were absorbed rapidly during the first 15 min, and then decreased to 90 min, then they were absorbed again from 90 min to the endpoint. The protein absorption was also affected by the protein processing method used. The Enzyme + Ultrasound (EU) processing method group had a higher absorption rate than the Enzyme (E) processing method group, and the absorption of the Enzyme + Artificial gastric juice processing method (EH) and Enzyme + Ultrasound + Artificial gastric juice processing method (EUH) groups was reduced compared to the E group alone. The amino acid analysis results showed that the amino acids were reduced and absorbed by our SIM in almost all groups except for cysteine and methionine. In general, the Pearson relation value of the amino acid contents between before SIM and after SIM was 0.887, which indicated that single amino acid absorption was mainly related to its content in the whole amino acids. The single amino acid absorption ratio among different groups also displayed differences, which ranged from 31% to 46% (E group from 39% to 42%; EU group from 40% to 47%; EH group from 31% to 39%; EUH group from 35% to 41%). Conclusions: The protein hydrolysates’ varied from startpoint to endpoint, and the protein absorption was affected by processing method.
Collapse
|
430
|
Chen T, Tian P, Huang Z, Zhao X, Wang H, Xia C, Wang L, Wei H. Engineered commensal bacteria prevent systemic inflammation-induced memory impairment and amyloidogenesis via producing GLP-1. Appl Microbiol Biotechnol 2018; 102:7565-7575. [PMID: 29955935 DOI: 10.1007/s00253-018-9155-6] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Revised: 04/30/2018] [Accepted: 06/04/2018] [Indexed: 12/31/2022]
Abstract
The anti-obesity drug GLP-1 has been proven to have an impact on central nervous system, while its extremely short half-life greatly limited its use. In this study, our group constructed two engineering strains MG1363-pMG36e-GLP-1 and VNP20009-pLIVE-GLP-1 to continuously express GLP-1, and supplementation of these strains, especially MG1363-pMG36e-GLP-1, had significantly restored the spatial learning and memory impairment of mice caused by LPS (p < 0.05), suppressed glia activation and Aβ accumulation, and downregulated inflammatory expressions of COX-2, TLR-4, TNF-a, and IL-1β. In addition, MG1363-pMG36e-GLP-1 had significantly blocked the translocation of NF-κB signal and inhibited the phosphorylation of redox-sensitive cytoplasmic signalings of MAPKs and PI3K/AKT. These data suggest that MG1363-pMG36e-GLP-1 could be used as a safe and effective nonabsorbed oral treatment for neuroinflammation-related diseases such as Alzheimer's disease (AD).
Collapse
Affiliation(s)
- Tingtao Chen
- School of Life Sciences, Nanchang University, Nanchang, Jiangxi, 330031, People's Republic of China.,Institute of Translational Medicine, Nanchang University, Nanchang, Jiangxi, 330031, People's Republic of China
| | - Puyuan Tian
- School of Life Sciences, Nanchang University, Nanchang, Jiangxi, 330031, People's Republic of China.,Institute of Translational Medicine, Nanchang University, Nanchang, Jiangxi, 330031, People's Republic of China
| | - Zhixiang Huang
- Institute of Translational Medicine, Nanchang University, Nanchang, Jiangxi, 330031, People's Republic of China
| | - Xiaoxiao Zhao
- Institute of Translational Medicine, Nanchang University, Nanchang, Jiangxi, 330031, People's Republic of China
| | - Huan Wang
- Institute of Translational Medicine, Nanchang University, Nanchang, Jiangxi, 330031, People's Republic of China
| | - Chaofei Xia
- Institute of Translational Medicine, Nanchang University, Nanchang, Jiangxi, 330031, People's Republic of China
| | - Le Wang
- School of Life Sciences, Nanchang University, Nanchang, Jiangxi, 330031, People's Republic of China
| | - Hua Wei
- School of Life Sciences, Nanchang University, Nanchang, Jiangxi, 330031, People's Republic of China. .,State Key Laboratory of Food Science and Technology, Nanchang, Jiangxi, 330031, People's Republic of China. .,State Key Laboratory of Food Science and Technology, Nanchang University 235 Nanjing Donglu, Nanchang, Jiangxi, 330047, People's Republic of China.
| |
Collapse
|
431
|
Rybnikova E. Brain, antibiotics, and microbiota - how do they interplay?: An Editorial for 'Antibiotics-induced modulation of large intestinal microbiota altered aromatic amino acid profile and expression of neurotransmitters in the hypothalamus of piglets' on page 219. J Neurochem 2018; 146:208-210. [PMID: 29953619 DOI: 10.1111/jnc.14341] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2018] [Accepted: 03/20/2018] [Indexed: 01/08/2023]
Abstract
The microbiome and its cross-talk with the brain have drawn increasing attention lately, since imbalances in the gut microbiota's composition may result in pathogenic dysfunctions affecting brain functioning up to development of neurodegenerative and mental diseases. The current Editorial discusses a study by Gao and coworkers in the current issue of the Journal of Neurochemistry in which the authors use a model of antibiotic-induced dysbiosis - targeted infusion of antibiotics into the gut - to assess if microbiotic metabolites exert effects on local neurotransmitter expression or contribute to the gut-brain axis. The authors mechanistically link distal ileal infusion of antibiotics with a change in the levels of microbial metabolites that affect the expression of neurotransmitters in the brain and thereby can participate in the fine-tuning of the hypothalamic functions, including regulation of visceral and neuroendocrine processes, stress responses, mood and anxiety. Their study thus represents an important step towards our understanding of the brain-gut axis, with the potential to advance therapeutics.
Collapse
|
432
|
Sochocka M, Donskow-Łysoniewska K, Diniz BS, Kurpas D, Brzozowska E, Leszek J. The Gut Microbiome Alterations and Inflammation-Driven Pathogenesis of Alzheimer's Disease-a Critical Review. Mol Neurobiol 2018; 56:1841-1851. [PMID: 29936690 PMCID: PMC6394610 DOI: 10.1007/s12035-018-1188-4] [Citation(s) in RCA: 327] [Impact Index Per Article: 54.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Accepted: 06/07/2018] [Indexed: 02/06/2023]
Abstract
One of the most important scientific discoveries of recent years was the disclosure that the intestinal microflora takes part in bidirectional communication between the gut and the brain. Scientists suggest that human gut microflora may even act as the “second brain” and be responsible for neurodegenerative disorders like Alzheimer’s disease (AD). Although human-associated microbial communities are generally stable, they can be altered by common human actions and experiences. Enteric bacteria, commensal, and pathogenic microorganisms, may have a major impact on immune system, brain development, and behavior, as they are able to produce several neurotransmitters and neuromodulators like serotonin, kynurenine, catecholamine, etc., as well as amyloids. However, brain destructive mechanisms, that can lead to dementia and AD, start with the intestinal microbiome dysbiosis, development of local and systemic inflammation, and dysregulation of the gut-brain axis. Increased permeability of the gut epithelial barrier results in invasion of different bacteria, viruses, and their neuroactive products that support neuroinflammatory reactions in the brain. It seems that, inflammatory-infectious hypothesis of AD, with the great role of the gut microbiome, starts to gently push into the shadow the amyloid cascade hypothesis that has dominated for decades. It is strongly postulated that AD may begin in the gut, and is closely related to the imbalance of gut microbiota. This is promising area for therapeutic intervention. Modulation of gut microbiota through personalized diet or beneficial microbiota intervention, alter microbial partners and their products including amyloid protein, will probably become a new treatment for AD.
Collapse
Affiliation(s)
- Marta Sochocka
- Laboratory of Virology, Department of Immunology of Infectious Diseases, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Wroclaw, Poland
| | | | - Breno Satler Diniz
- Department of Psychiatry and Behavioral Sciences, and The Consortium on Aging, The University of Texas Health Science Center at Houston, Houston, TX, USA
| | - Donata Kurpas
- Department of Family Medicine, Wroclaw Medical University, Wroclaw, Poland
| | - Ewa Brzozowska
- Laboratory of Medical Microbiology, Department of Immunology of Infectious Diseases, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Wroclaw, Poland
| | - Jerzy Leszek
- Department of Psychiatry, Wroclaw Medical University, Wroclaw, Poland.
| |
Collapse
|
433
|
Stephenson J, Nutma E, van der Valk P, Amor S. Inflammation in CNS neurodegenerative diseases. Immunology 2018; 154:204-219. [PMID: 29513402 PMCID: PMC5980185 DOI: 10.1111/imm.12922] [Citation(s) in RCA: 591] [Impact Index Per Article: 98.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Revised: 02/22/2018] [Accepted: 02/28/2018] [Indexed: 12/11/2022] Open
Abstract
Neurodegenerative diseases, the leading cause of morbidity and disability, are gaining increased attention as they impose a considerable socioeconomic impact, due in part to the ageing community. Neuronal damage is a pathological hallmark of Alzheimer's and Parkinson's diseases, amyotrophic lateral sclerosis, Huntington's disease, spinocerebellar ataxia and multiple sclerosis, although such damage is also observed following neurotropic viral infections, stroke, genetic white matter diseases and paraneoplastic disorders. Despite the different aetiologies, for example, infections, genetic mutations, trauma and protein aggregations, neuronal damage is frequently associated with chronic activation of an innate immune response in the CNS. The growing awareness that the immune system is inextricably involved in shaping the brain during development as well as mediating damage, but also regeneration and repair, has stimulated therapeutic approaches to modulate the immune system in neurodegenerative diseases. Here, we review the current understanding of how astrocytes and microglia, as well as neurons and oligodendrocytes, shape the neuroimmune response during development, and how aberrant responses that arise due to genetic or environmental triggers may predispose the CNS to neurodegenerative diseases. We discuss the known interactions between the peripheral immune system and the brain, and review the current concepts on how immune cells enter and leave the CNS. A better understanding of neuroimmune interactions during development and disease will be key to further manipulating these responses and the development of effective therapies to improve quality of life, and reduce the impact of neuroinflammatory and degenerative diseases.
Collapse
Affiliation(s)
- Jodie Stephenson
- Centre for Neuroscience and TraumaBarts and the Blizard Institute, LondonSchool of Medicine and DentistryQueen Mary University of LondonLondonUK
- Department of PathologyVU University Medical CentreAmsterdamthe Netherlands
| | - Erik Nutma
- Department of PathologyVU University Medical CentreAmsterdamthe Netherlands
| | - Paul van der Valk
- Department of PathologyVU University Medical CentreAmsterdamthe Netherlands
| | - Sandra Amor
- Centre for Neuroscience and TraumaBarts and the Blizard Institute, LondonSchool of Medicine and DentistryQueen Mary University of LondonLondonUK
- Department of PathologyVU University Medical CentreAmsterdamthe Netherlands
| |
Collapse
|
434
|
Clinical and metabolic response to probiotic administration in people with Parkinson's disease: A randomized, double-blind, placebo-controlled trial. Clin Nutr 2018; 38:1031-1035. [PMID: 29891223 DOI: 10.1016/j.clnu.2018.05.018] [Citation(s) in RCA: 200] [Impact Index Per Article: 33.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Revised: 04/26/2018] [Accepted: 05/23/2018] [Indexed: 01/08/2023]
Abstract
BACKGROUND & AIMS The investigation was done to assess the impacts of probiotic supplementation on movement and metabolic parameters in individuals with Parkinson's disease (PD). METHODS The study is randomized, double-blind, placebo-controlled clinical trial, which was done in sixty people with PD. Individuals were randomly divided into two groups in order to take either 8 × 109 CFU/day probiotic or placebo (n = 30 each group) that lasted 12 weeks. The Movement Disorders Society-Unified Parkinson's Disease Rating Scale (MDS-UPDRS) was recorded at pre- and post-intervention. RESULTS Compared with the placebo, consuming probiotic decreased MDS-UPDRS (-4.8 ± 12.5 vs. +3.8 ± 13.0, P = 0.01). Probiotic supplementation also reduced high-sensitivity C-reactive protein (-1.6 ± 2.5 vs. +0.1 ± 0.3 mg/L, P < 0.001) and malondialdehyde (-0.2 ± 0.3 vs. +0.1 ± 0.3 μmol/L, P = 0.006), and enhanced glutathione levels (+40.1 ± 81.5 vs. -12.1 ± 41.7 μmol/L, P = 0.03) in comparison with the placebo. Additionally, probiotic consumption resulted in a statistically significant reduction in insulin levels (-2.1 ± 3.4 vs. +1.5 ± 5.1 μIU/mL, P = 0.002) and insulin resistance (-0.5 ± 0.9 vs. +0.4 ± 1.2, P = 0.002), and a statistically significant rise in insulin sensitivity (+0.01 ± 0.02 vs. -0.006 ± 0.02, P = 0.01) in comparison with the placebo. Probiotic intake had no any significant impact on other metabolic profiles. CONCLUSIONS Our study evidenced that 12 weeks of probiotic consumption by individuals with PD had useful impacts on MDS-UPDRS and few metabolic profiles. Registered under ClinicalTrials.gov Identifier no. http://www.irct.ir: IRCT2017082434497N4.
Collapse
|
435
|
Impact of Fungi on Immune Responses. Clin Ther 2018; 40:885-888. [PMID: 29752039 DOI: 10.1016/j.clinthera.2018.04.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Revised: 04/09/2018] [Accepted: 04/18/2018] [Indexed: 12/25/2022]
Abstract
Spores and fungal fragments found in indoor and outdoor environments originate from opportunistic fungi and they can contribute to inflammatory responses, causing a broad range of symptoms. Papers were selected and reviewed with an emphasis on the molecular mechanisms involved in the effect of fungi on immune cells, especially mast cells (MCs). Fungi can bind to antibodies and complement them, allowing them to be recognized by cells of the innate immune system, including macrophages, dendritic cells, and MCs, which are then stimulated via Toll-like receptor signaling. Fungi can cause diseases mediated by MCs and aggravate allergic inflammation. Immunosuppressed subjects can be particularly susceptible to developing diseases caused by opportunistic fungi. Mold also liberates mycotoxins that could be on volatile spores and stimulate MCs to secrete pro-inflammatory cytokines/chemokines, but this mechanism is not known. Fungi can activate the immune system directly or through mycotoxins, leading to stimulation of immune cells and chronic neuroinflammatory symptoms. Some of these processes may be inhibited by the new anti-inflammatory cytokine interleukin 37.
Collapse
|
436
|
Ostojic SM. Inadequate Production of H 2 by Gut Microbiota and Parkinson Disease. Trends Endocrinol Metab 2018; 29:286-288. [PMID: 29478695 DOI: 10.1016/j.tem.2018.02.006] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Revised: 02/03/2018] [Accepted: 02/05/2018] [Indexed: 10/18/2022]
Abstract
Dysbiosis of the gut flora accompanies Parkinson disease (PD), yet no specific cause-effect link has been identified so far. The gut microbiota produce molecular hydrogen (H2), a ubiquitous molecule recently recognized as a biologically active gas with antioxidant, antiapoptotic, anti-inflammatory, cytoprotective, and signaling properties. Here, we discuss an idea that an impaired production of endogenous H2 by intestinal microbiota might play a role in PD pathogenesis, with supplemental H2 debated as a possible therapy for this progressive neurodegenerative disease.
Collapse
Affiliation(s)
- Sergej M Ostojic
- Applied Bioenergetics Lab, University of Novi Sad, Novi Sad, Serbia; University of Belgrade School of Medicine, Belgrade, Serbia.
| |
Collapse
|
437
|
Disease-Associated Microglia: A Universal Immune Sensor of Neurodegeneration. Cell 2018; 173:1073-1081. [DOI: 10.1016/j.cell.2018.05.003] [Citation(s) in RCA: 717] [Impact Index Per Article: 119.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Revised: 04/17/2018] [Accepted: 04/29/2018] [Indexed: 11/18/2022]
|
438
|
Zhao Y, Lukiw WJ. Bacteroidetes Neurotoxins and Inflammatory Neurodegeneration. Mol Neurobiol 2018; 55:9100-9107. [PMID: 29637444 DOI: 10.1007/s12035-018-1015-y] [Citation(s) in RCA: 62] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Accepted: 03/16/2018] [Indexed: 12/31/2022]
Abstract
The gram-negative facultative anaerobe Bacteroides fragilis (B. fragilis) constitutes an appreciable proportion of the human gastrointestinal (GI)-tract microbiome. As is typical of most gram-negative bacilli, B. fragilis secretes an unusually complex mixture of neurotoxins including the extremely pro-inflammatory lipopolysaccharide BF-LPS. LPS (i) has recently been shown to associate with the periphery of neuronal nuclei in sporadic Alzheimer's disease (AD) brain and (ii) promotes the generation of the inflammatory transcription factor NF-kB (p50/p65 complex) in human neuronal-glial cells in primary-culture. In turn, the NF-kB (p50/p65 complex) strongly induces the transcription of a small family of pro-inflammatory microRNAs (miRNAs) including miRNA-9, miRNA-34a, miRNA-125b, miRNA-146a, and miRNA-155. These ultimately bind with the 3'-untranslated region (3'-UTR) of several target messenger RNAs (mRNAs) and thereby reduce their expression. Down-regulated mRNAs include those encoding complement factor-H (CFH), an SH3-proline-rich multi-domain-scaffolding protein of the postsynaptic density (SHANK3), and the triggering receptor expressed in myeloid/microglial cells (TREM2), as is observed in sporadic AD brain. Hence, a LPS normally confined to the GI tract is capable of driving a NF-kB-miRNA-mediated deficiency in gene expression that contributes to alterations in synaptic-architecture and synaptic-deficits, amyloidogenesis, innate-immune defects, and progressive inflammatory signaling, all of which are characteristics of AD-type neurodegeneration. This article will review the most recent research which supports the idea that bacterial components of the GI tract microbiome such as BF-LPS can transverse biophysical barriers and contribute to AD-type change. For the first-time, these results indicate that specific GI tract microbiome-derived neurotoxins have a strong pathogenic role in eliciting alterations in NF-kB-miRNA-directed gene expression that drives the AD process.
Collapse
Affiliation(s)
- Yuhai Zhao
- LSU Neuroscience Center, Louisiana State University Health Sciences Center, 2020 Gravier Street, Suite 904, New Orleans, LA, 70112, USA.,Department of Cell Biology and Anatomy, Louisiana State University Health Sciences Center, 2020 Gravier Street, Suite 904, New Orleans, LA, 70112, USA
| | - Walter J Lukiw
- LSU Neuroscience Center, Louisiana State University Health Sciences Center, 2020 Gravier Street, Suite 904, New Orleans, LA, 70112, USA. .,Department of Neurology, Louisiana State University Health Sciences Center, 2020 Gravier Street, Suite 904, New Orleans, LA, 70112, USA. .,Departments of Ophthalmology, Louisiana State University Health Sciences Center, 2020 Gravier Street, Suite 904, New Orleans, LA, 70112, USA.
| |
Collapse
|
439
|
Comparison of Different Strategies for Providing Fecal Microbiota Transplantation to Treat Patients with Recurrent Clostridium difficile Infection in Two English Hospitals: A Review. Infect Dis Ther 2018; 7:71-86. [PMID: 29450831 PMCID: PMC5840108 DOI: 10.1007/s40121-018-0189-y] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2018] [Indexed: 12/13/2022] Open
Abstract
Fecal microbiota transplant (FMT) has emerged as a highly efficacious treatment for difficult cases of refractory and/or recurrent Clostridium difficile infection (CDI). There have been many well-conducted randomized controlled trials and thousands of patients reported in case series that describe success rates of approximately 90% following one or more FMT. Although the exact mechanisms of FMT have yet to be fully elucidated, replacement or restoration of a 'normal' microbiota (or at least a microbiota resembling those who have never had CDI) appears to have a positive effect on the gut dysbiosis that is thought to exist in these patients. Furthermore, despite being aesthetically unappealing, this 'ultimate probiotic' is a particularly attractive solution to a difficult problem that avoids repeated courses of antibiotics. The lack of clarity about the exact mechanism of action and the 'active ingredient' of FMT (e.g., individual or communities of bacteria, bacteriophage, or bioactive molecules such as bile acids) has hindered the ability to produce a standardized and well-characterized FMT product. There is no standard method to produce material for FMT, and there are a multitude of factors that can vary between institutions that offer this therapy. Only a few studies have directly compared clinical efficacy in groups of patients who have been treated with FMT prepared differently (e.g., fresh vs. frozen) or administered by different route (e.g., by nasojejunal tube, colonoscopy or by oral administration of encapsulated product). More of these studies should be undertaken to clarify the superiority or otherwise of these variables. This review describes the methods and protocols that two English NHS hospitals independently adopted over the same time period to provide FMT for patients with recurrent CDI. There are several fundamental differences in the methods used, including selection and testing of donors, procedures for preparation and storage of material, and route of administration. These methods are described in detail in this review highlighting differing practice. Despite these significant methodological variations, clinical outcomes in terms of cure rate appear to be remarkably similar for both FMT providers. Although both hospitals have treated only modest numbers of patients, these findings suggest that many of the described differences may not be critical factors in influencing the success of the procedure. As FMT is increasingly being proposed for a number of conditions other than CDI, harmonization of methods and techniques may be more critical to the success of FMT, and thus it will be important to standardize these as far as practically possible.
Collapse
|
440
|
Bonaz B, Bazin T, Pellissier S. The Vagus Nerve at the Interface of the Microbiota-Gut-Brain Axis. Front Neurosci 2018; 12:49. [PMID: 29467611 PMCID: PMC5808284 DOI: 10.3389/fnins.2018.00049] [Citation(s) in RCA: 648] [Impact Index Per Article: 108.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Accepted: 01/22/2018] [Indexed: 12/13/2022] Open
Abstract
The microbiota, the gut, and the brain communicate through the microbiota-gut-brain axis in a bidirectional way that involves the autonomic nervous system. The vagus nerve (VN), the principal component of the parasympathetic nervous system, is a mixed nerve composed of 80% afferent and 20% efferent fibers. The VN, because of its role in interoceptive awareness, is able to sense the microbiota metabolites through its afferents, to transfer this gut information to the central nervous system where it is integrated in the central autonomic network, and then to generate an adapted or inappropriate response. A cholinergic anti-inflammatory pathway has been described through VN's fibers, which is able to dampen peripheral inflammation and to decrease intestinal permeability, thus very probably modulating microbiota composition. Stress inhibits the VN and has deleterious effects on the gastrointestinal tract and on the microbiota, and is involved in the pathophysiology of gastrointestinal disorders such as irritable bowel syndrome (IBS) and inflammatory bowel disease (IBD) which are both characterized by a dysbiosis. A low vagal tone has been described in IBD and IBS patients thus favoring peripheral inflammation. Targeting the VN, for example through VN stimulation which has anti-inflammatory properties, would be of interest to restore homeostasis in the microbiota-gut-brain axis.
Collapse
Affiliation(s)
- Bruno Bonaz
- Division of Hepato-Gastroenterology, University Hospital, Grenoble Alpes, France.,Grenoble Institute of Neurosciences, University Grenoble Alpes, Inserm U1216, Grenoble, France
| | - Thomas Bazin
- Institut National de la Recherche Agronomique, Mycoplasmal and Chlamydial Infections in Humans, Univ. Bordeaux, Bordeaux, France.,Department of Hepato-Gastroenterology, Bordeaux Hospital University Center, Pessac, France
| | - Sonia Pellissier
- LIP/PC2S, Université Grenoble Alpes, Université Savoie Mont Blanc, Grenoble, France
| |
Collapse
|
441
|
Du X, Wang X, Geng M. Alzheimer's disease hypothesis and related therapies. Transl Neurodegener 2018; 7:2. [PMID: 29423193 PMCID: PMC5789526 DOI: 10.1186/s40035-018-0107-y] [Citation(s) in RCA: 347] [Impact Index Per Article: 57.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Accepted: 01/18/2018] [Indexed: 12/21/2022] Open
Abstract
Alzheimer's disease (AD) is a progressive neurodegenerative disorder and the most common cause for dementia. There are many hypotheses about AD, including abnormal deposit of amyloid β (Aβ) protein in the extracellular spaces of neurons, formation of twisted fibers of tau proteins inside neurons, cholinergic neuron damage, inflammation, oxidative stress, etc., and many anti-AD drugs based on these hypotheses have been developed. In this review, we will discuss the existing and emerging hypothesis and related therapies.
Collapse
Affiliation(s)
- Xiaoguang Du
- Shanghai GreenValley Pharmaceutical Co., Ltd., 421 Newton Road, Shanghai, 201203 People's Republic of China
| | - Xinyi Wang
- Shanghai GreenValley Pharmaceutical Co., Ltd., 421 Newton Road, Shanghai, 201203 People's Republic of China
| | - Meiyu Geng
- 2State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Shanghai, 201203 People's Republic of China
| |
Collapse
|
442
|
Ghoshal UC. Gut Microbiota-Brain Axis Modulation by a Healthier Microbiological Microenvironment : Facts and Fictions. J Neurogastroenterol Motil 2018; 24:4-6. [PMID: 29291603 PMCID: PMC5753898 DOI: 10.5056/jnm17150] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/26/2017] [Accepted: 12/26/2017] [Indexed: 01/16/2023] Open
Affiliation(s)
- Uday C Ghoshal
- Department of Gastroenterology, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, India
| |
Collapse
|
443
|
The Gut-Brain Axis and the Microbiome: Clues to Pathophysiology and Opportunities for Novel Management Strategies in Irritable Bowel Syndrome (IBS). J Clin Med 2018; 7:jcm7010006. [PMID: 29301380 PMCID: PMC5791014 DOI: 10.3390/jcm7010006] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2017] [Revised: 12/27/2017] [Accepted: 12/28/2017] [Indexed: 02/06/2023] Open
Abstract
Irritable bowel syndrome (IBS) is one of the most common of all medical disorders worldwide and, while for some it represents no more than a nuisance, for others it imposes significant negative impacts on daily life and activities. IBS is a heterogeneous disorder and may well have a number of causes which may lie anywhere from the external environment to the contents of the gut lumen and from the enteric neuromuscular apparatus and the gut immune system to the central nervous system. Consequently, the paradigm of the gut-brain axis, which includes the participation of these various factors, has proven a useful model to assist clinicians and patients alike in understanding the genesis of symptoms in IBS. Now, given the widespread interest in the gut microbiome in health and disease, in general, reports of disordered enteric bacterial communities in IBS, and experimental data to indicate that components of the gut microbiota can influence brain morphology and function, as well as behavior and cognition, this concept has been extended to encompass the microbiota-gut-brain axis. The implications of this novel concept to the assessment and management of IBS will be explored in this review.
Collapse
|
444
|
Park SH, Lee JH. National dementia research and development project. JOURNAL OF THE KOREAN MEDICAL ASSOCIATION 2018. [DOI: 10.5124/jkma.2018.61.5.304] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Affiliation(s)
- So-Hee Park
- Department of Neurology, Asan Medical Center, University Ulsan College of Medicine, Seoul, Korea
| | - Jae-Hong Lee
- Department of Neurology, Asan Medical Center, University Ulsan College of Medicine, Seoul, Korea
| |
Collapse
|