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Ashique S, Mohanto S, Ahmed MG, Mishra N, Garg A, Chellappan DK, Omara T, Iqbal S, Kahwa I. Gut-brain axis: A cutting-edge approach to target neurological disorders and potential synbiotic application. Heliyon 2024; 10:e34092. [PMID: 39071627 PMCID: PMC11279763 DOI: 10.1016/j.heliyon.2024.e34092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2024] [Revised: 06/10/2024] [Accepted: 07/03/2024] [Indexed: 07/30/2024] Open
Abstract
The microbiota-gut-brain axis (MGBA) represents a sophisticated communication network between the brain and the gut, involving immunological, endocrinological, and neural mediators. This bidirectional interaction is facilitated through the vagus nerve, sympathetic and parasympathetic fibers, and is regulated by the hypothalamic-pituitary-adrenal (HPA) axis. Evidence shows that alterations in gut microbiota composition, or dysbiosis, significantly impact neurological disorders (NDs) like anxiety, depression, autism, Parkinson's disease (PD), and Alzheimer's disease (AD). Dysbiosis can affect the central nervous system (CNS) via neuroinflammation and microglial activation, highlighting the importance of the microbiota-gut-brain axis (MGBA) in disease pathogenesis. The microbiota influences the immune system by modulating chemokines and cytokines, impacting neuronal health. Synbiotics have shown promise in treating NDs by enhancing cognitive function and reducing inflammation. The gut microbiota's role in producing neurotransmitters and neuroactive compounds, such as short-chain fatty acids (SCFAs), is critical for CNS homeostasis. Therapeutic interventions targeting the MGBA, including dietary modulation and synbiotic supplementation, offer potential benefits for managing neurodegenerative disorders. However, more in-depth clinical studies are necessary to fully understand and harness the therapeutic potential of the MGBA in neurological health and disease.
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Affiliation(s)
- Sumel Ashique
- Department of Pharmaceutical Sciences, Bengal College of Pharmaceutical Sciences & Research, Durgapur, 713212, West Bengal, India
| | - Sourav Mohanto
- Department of Pharmaceutics, Yenepoya Pharmacy College & Research Centre, Yenepoya (Deemed to Be University), Mangalore, Karnataka, 575018, India
| | - Mohammed Gulzar Ahmed
- Department of Pharmaceutics, Yenepoya Pharmacy College & Research Centre, Yenepoya (Deemed to Be University), Mangalore, Karnataka, 575018, India
| | - Neeraj Mishra
- Department of Pharmaceutics, Amity Institute of Pharmacy, Amity University Madhya Pradesh (AUMP), Gwalior, MP, 474005, India
| | - Ashish Garg
- Department of Pharmaceutics, Guru Ramdas Khalsa Institute of Science and Technology (Pharmacy), Jabalpur, Madhya Pradesh, India
| | - Dinesh Kumar Chellappan
- Department of Life Sciences, School of Pharmacy, International Medical University, Bukit Jalil, 57000, Kuala Lumpur, Malaysia
| | - Timothy Omara
- Department of Chemistry, College of Natural Sciences, Makerere University, P.O. Box 7062, Kampala, Uganda
| | - Shabnoor Iqbal
- African Medicines Innovations and Technologies Development, Department of Pharmacology, Faculty of Health Sciences, University of the Free State, Bloemfontein, 9300, South Africa
| | - Ivan Kahwa
- Department of Pharmacy, Faculty of Medicine, Mbarara University of Science and Technology, Uganda
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Irani H, Abiri B, Khodami B, Yari Z, Lafzi Ghazi M, Hosseinzadeh N, Saidpour A. Effect of time restricted feeding on anthropometric measures, eating behavior, stress, serum levels of BDNF and LBP in overweight/obese women with food addiction: a randomized clinical trial. Nutr Neurosci 2024; 27:577-589. [PMID: 37436939 DOI: 10.1080/1028415x.2023.2234704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/14/2023]
Abstract
BACKGROUND & AIM Food addiction (FA) as a specific food-related behavior may play an essential role in the pathogenesis of obesity. Brain-derived neurotrophic factor (BDNF) and gut microbiota (GM) alterations probably through fasting are closely related to brain function, affecting eating behaviors and body weight management. This study aimed to evaluate the effect of time-restricted feeding (TRF) on serum BDNF levels and eating behaviors in overweight and obese women with FA. METHODS AND DESIGN This clinical trial was performed with a 2-month follow-up on 56 obese and overweight women with FA. Participants were randomly divided into two groups receiving a low-calorie diet (n = 27) and a group receiving a low-calorie diet with TRF (n = 29). Anthropometric measurements, biochemical markers, eating behavior, and stress were assessed during the study period. RESULTS The reductions in weight, body mass index (BMI), waist circumference, and body fat mass were significantly higher in the TRF group compared to the control group at week 8 (P = 0.018, P = 0.015. P = 0.03, and P = 0.036, respectively). The cognitive restriction score was higher in the TRF as compared with the control group (P = 0.002). The food addiction criteria score was significantly reduced in both groups (P < 0.001). Serum levels of BDNF were significantly increased in the TRF group (P < 0.001). In addition, BDNF levels had a positive and significant correlation with the cognitive restriction score (r = 0.468 and P < 0.001), While the correlation with FA was not significant (β = 0.588 and P = 0.618). Lipopolysaccharide binding protein decreased significantly in both groups, but this decrease was significantly higher in the TRF group than in the control group (P < 0.001). CONCLUSION The results of this study showed that a low-calorie diet with TRF is more effective in weight management than a low-calorie diet alone, probably through further modulating the GM and improving BDNF levels. More effective weight loss in the TRF is probably related to better management of eating behavior than FA. TRIAL REGISTRATION Iranian Registry of Clinical Trials identifier: IRCT20131228015968N7.
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Affiliation(s)
- Hanieh Irani
- Department of Clinical Nutrition & Dietetics, Faculty of Nutrition and Food Technology, National Nutrition and Food Technology Research Institute, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Behnaz Abiri
- Obesity Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Banafsheh Khodami
- Department of Clinical Nutrition & Dietetics, Faculty of Nutrition and Food Technology, National Nutrition and Food Technology Research Institute, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Zahra Yari
- Department of Clinical Nutrition & Dietetics, Faculty of Nutrition and Food Technology, National Nutrition and Food Technology Research Institute, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Maryam Lafzi Ghazi
- Department of Exercise Physiology, Central Tehran Branch, Islamic Azad University, Tehran, Iran
| | - Nima Hosseinzadeh
- Cellular and Molecular Endocrine Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Atoosa Saidpour
- Department of Clinical Nutrition & Dietetics, Faculty of Nutrition and Food Technology, National Nutrition and Food Technology Research Institute, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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Freitas SM, Franco B, Saragiotto G, Morais MA, Simabuco FM, Cunha DT, Esteves AM, Antunes AEC. Effect of a probiotic fermented milk supplementation on behavior and sleep. Nutr Neurosci 2024; 27:607-619. [PMID: 37496309 DOI: 10.1080/1028415x.2023.2240990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/28/2023]
Abstract
This study attempted to analyze the effect of supplementing Wistar-Kyoto rats with fermented milk containing the probiotic Bifidobacterium animalis BB-12 and pomegranate juice on the microbiota-gut-brain axis of rats, with special focus on their behavior, sleep patterns, and response to stress. This study was divided into two experiments: (1) For the behavioral analysis the animals were divided into two groups: Fermented probiotic milk (BB + 1) and control (BB-). (2) For the sleep analysis the animals were divided into two groups: Fermented probiotic milk (BB + 2) and control (H2O). For the behavioral analysis, the open field method was used, which evaluates the behavior after ten, twenty, and thirty days of supplementation. For sleep analysis, the animals were submitted to implantation of electrodes and 24 h polysomnography, followed by 48 h sleep deprivation (REM) and 48 h polysomnography, then euthanized 100 days after the beginning of the experiment. In addition, animal feces were collected before and after sleep deprivation to assess its effects on the microbiota. A decrease in anxiety-related behaviors was observed in the supplemented animals and an increase in sleep efficiency and a reduction in the number of awakenings of the animals before deprivation. It has also been observed that sleep deprivation decreased the amount of total bacterial DNA. The number of copies of genomes of the genus Bifidobacterium did not differ in both groups.
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Affiliation(s)
- Samara M Freitas
- School of Applied Sciences, University of Campinas, Limeira, Brazil
| | - Beatriz Franco
- School of Physical Education, University of Campinas, Campinas, Brazil
| | | | - Milca A Morais
- School of Applied Sciences, University of Campinas, Limeira, Brazil
| | | | - Diogo T Cunha
- School of Applied Sciences, University of Campinas, Limeira, Brazil
| | - Andrea M Esteves
- School of Applied Sciences, University of Campinas, Limeira, Brazil
- School of Physical Education, University of Campinas, Campinas, Brazil
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Schellekens H, Ribeiro G, Cuesta-Marti C, Cryan JF. The microbiome-gut-brain axis in nutritional neuroscience. Nutr Neurosci 2023; 26:1159-1171. [PMID: 36222323 DOI: 10.1080/1028415x.2022.2128007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
Emerging evidence is highlighting the microbiome as a key regulator of the effect of nutrition on gut-brain axis signaling. Nevertheless, it is not yet clear whether the impact of nutrition is moderating the microbiota-gut-brain interaction or if diet has a mediating role on microbiota composition and function to influence central nervous system function, brain phenotypes and behavior. Mechanistic evidence from cell-based in vitro studies, animal models and preclinical intervention studies are linking the gut microbiota to the effects of diet on brain function, but they have had limited translation to human intervention studies. While increasing evidence demonstrates the triangulating relationship between diet, microbiota, and brain function across the lifespan, future mechanistic and translational studies in the field of microbiota and nutritional neuroscience are warranted to inform potential strategies for prevention and management of several neurological, neurodevelopmental, neurodegenerative, and psychiatric disorders. This brief primer provides an overview of the most recent advances in the nutritional neuroscience - microbiome field, highlighting significant opportunities for future research.
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Affiliation(s)
- Harriët Schellekens
- APC Microbiome Ireland, University College Cork, Cork, Ireland
- Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland
| | | | - Cristina Cuesta-Marti
- APC Microbiome Ireland, University College Cork, Cork, Ireland
- Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland
| | - John F Cryan
- APC Microbiome Ireland, University College Cork, Cork, Ireland
- Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland
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5
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Zhang S, Lu B, Wang G. The role of gut microbiota in the pathogenesis and treatment of postpartum depression. Ann Gen Psychiatry 2023; 22:36. [PMID: 37759312 PMCID: PMC10523734 DOI: 10.1186/s12991-023-00469-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/11/2023] [Accepted: 09/22/2023] [Indexed: 09/29/2023] Open
Abstract
Postpartum depression (PPD) is a common complication of pregnancy in women, and its pathogenesis mainly involves disturbances of the neuroendocrine regulation, immune system, neurotransmitters, hormone secretion, and the gut microbiome. Gut microbes play essential physiological and pathological roles in the gut-brain axis' pathways which are involved in various central nervous system (CNS) and psychiatric disorders, including PPD. Numerous studies have identified the fundamental role of the gut-brain axis in the pathogenesis and treatment of PPD patients and also correlates with other pathogenic mechanisms of PPD. Disturbances in gut microbes are associated with the disruption of multiple signaling pathways and systems that ultimately lead to PPD development. This review aimed to elucidate the potential connections between gut microbes and the established PPD network, and this might serve as a guide for the development of new efficient diagnostic, therapeutic, and prognostic strategies in the management of PPD.
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Affiliation(s)
| | - Baili Lu
- Wuhan Mental Health Center, Wuhan, China
| | - Gang Wang
- Wuhan Mental Health Center, Wuhan, China.
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Wattanathorn J, Tong-un T, Thukham-mee W, Paholpak P, Rangseekhajee P. A Randomized, Double-Blind, Placebo-Controlled Study of an Anthocyanin-Rich Functional Ingredient on Cognitive Function and Eye Dryness in Late Adulthood Volunteers: Roles of Epigenetic and Gut Microbiome Modulations. Nutrients 2023; 15:3499. [PMID: 37630690 PMCID: PMC10459889 DOI: 10.3390/nu15163499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2023] [Revised: 08/02/2023] [Accepted: 08/05/2023] [Indexed: 08/27/2023] Open
Abstract
Due to the rising demand for supplements targeting cognitive enhancement and dry eye together with the health benefits of anthocyanins, we have developed a functional soup containing an anthocyanin-rich functional ingredient, or "Anthaplex," and assessed the effects on cognitive function and eye dryness together with the possible mechanisms. A total of 69 male and female health volunteers were randomized and divided into placebo, D2, and D4 groups. All subjects consumed 120 mL of placebo or functional soup containing "Anthaplex" either at 2 or 4 g per serving per day within 5 min in the morning for eight weeks. The cognitive function, working memory, dry eye, AChE, MAO, MAO-A, MAO-B, and GABA-T activities, BDNF, HAC, HDAC, and DNMT activities, pH, and amount of lactic acid-producing bacteria, particularly Lactobacillus and Bifidobacterium spp. in feces, were determined before intervention and after eight weeks of consumption. Subjects who consumed the "Anthaplex" soup had improved cognitive function, working memory, eye dryness, histone acetylation, ACh E suppression, and BDNF with increased Bifidobacterium spp. but decreased pH in feces. These data suggest that "Anthaplex" improves cognitive function and eye dryness via the modulations of the histone acetylation process, gut microbiome, and cholinergic function.
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Affiliation(s)
- Jintanaporn Wattanathorn
- Department of Physiology, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand; (T.T.-u.); (W.T.-m.)
- Research Institute for High Human Performance and Health Promotion, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Terdthai Tong-un
- Department of Physiology, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand; (T.T.-u.); (W.T.-m.)
- Research Institute for High Human Performance and Health Promotion, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Wipawee Thukham-mee
- Department of Physiology, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand; (T.T.-u.); (W.T.-m.)
- Research Institute for High Human Performance and Health Promotion, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Pongsatorn Paholpak
- Department Psychiatry, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand; (P.P.); (P.R.)
| | - Poonsri Rangseekhajee
- Department Psychiatry, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand; (P.P.); (P.R.)
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Golchin A, Ranjbarvan P, Parviz S, Shokati A, Naderi R, Rasmi Y, Kiani S, Moradi F, Heidari F, Saltanatpour Z, Alizadeh A. The role of probiotics in tissue engineering and regenerative medicine. Regen Med 2023; 18:635-657. [PMID: 37492007 DOI: 10.2217/rme-2022-0209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/27/2023] Open
Abstract
Tissue engineering and regenerative medicine (TERM) as an emerging field is a multidisciplinary science and combines basic sciences such as biomaterials science, biology, genetics and medical sciences to achieve functional TERM-based products to regenerate or replace damaged or diseased tissues or organs. Probiotics are useful microorganisms which have multiple effective functions on human health. They have some immunomodulatory and biocompatibility effects and improve wound healing. In this article, we describe the latest findings on probiotics and their pro-healing properties on various body systems that are useable in regenerative medicine. Therefore, this review presents a new perspective on the therapeutic potential of probiotics for TERM.
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Affiliation(s)
- Ali Golchin
- Cellular & Molecular Research Center, Cellular & Molecular Medicine Research Institute, Urmia University of Medical Sciences, Urmia, 57157993313, Iran
- Department of Clinical Biochemistry & Applied Cell Sciences, School of Medicine, Urmia University of Medical Sciences, Urmia, 57157993313, Iran
| | - Parviz Ranjbarvan
- Cellular & Molecular Research Center, Cellular & Molecular Medicine Research Institute, Urmia University of Medical Sciences, Urmia, 57157993313, Iran
- Department of Clinical Biochemistry & Applied Cell Sciences, School of Medicine, Urmia University of Medical Sciences, Urmia, 57157993313, Iran
| | - Shima Parviz
- Department of Tissue Engineering & Applied cell sciences, School of Advanced Technologies in Medicine, Shiraz University of Medical Sciences, Shiraz, 71348-14336, Iran
| | - Amene Shokati
- Department of Applied Cell Sciences, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, 1417755469, Iran
| | - Roya Naderi
- Neurophysiology Research center & Department of Physiology, Faculty of Medicine, Urmia University of Medical Sciences, Urmia, 57157993313, Iran
| | - Yousef Rasmi
- Cellular & Molecular Research Center & Department of Biochemistry, Faculty of Medicine, Urmia University of Medical Sciences, Urmia, 57157993313, Iran
| | - Samaneh Kiani
- Department of Tissue Engineering & Regenerative Medicine, School of Advanced Technologies in Medicine, Mazandaran University of Medical Sciences, Sari, 48157-33971, Iran
| | - Faezeh Moradi
- Department of Tissue engineering, Medical Sciences Faculty, Tarbiat Modares University, Tehran, 14117-13116, Iran
| | - Fahimeh Heidari
- Department of Molecular Medicine, School of Advanced Medical Sciences & Technologies, Shiraz University of Medical Sciences, Shiraz, 71348-14336, Iran
- Shiraz Institute for Cancer Research, School of Medicine, Shiraz University of Medical Sciences, Shiraz, 71348-14336, Iran
| | - Zohreh Saltanatpour
- Pediatric Cell & Gene Therapy Research Center, Gene, Cell & Tissue Research Institute, Tehran University of Medical Sciences, Tehran, 1417755469, Iran
- Stem Cell & Regenerative Medicine Center of Excellence, Tehran University of Medical Sciences, Tehran, 1417755469, Iran
| | - Akram Alizadeh
- Nervous System Stem Cells Research Center & Department of Tissue Engineering & Applied Cell Sciences, Faculty of Medicine, Semnan University of Medical Sciences, Semnan, 35147-99422, Iran
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Torraville SE, Flynn CM, Kendall TL, Yuan Q. Life Experience Matters: Enrichment and Stress Can Influence the Likelihood of Developing Alzheimer's Disease via Gut Microbiome. Biomedicines 2023; 11:1884. [PMID: 37509523 PMCID: PMC10377385 DOI: 10.3390/biomedicines11071884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 06/21/2023] [Accepted: 06/30/2023] [Indexed: 07/30/2023] Open
Abstract
Alzheimer's disease (AD) is a chronic neurodegenerative disease, characterized by the presence of β-amyloid (Aβ) plaques and neurofibrillary tangles (NFTs) formed from abnormally phosphorylated tau proteins (ptau). To date, there is no cure for AD. Earlier therapeutic efforts have focused on the clinical stages of AD. Despite paramount efforts and costs, pharmaceutical interventions including antibody therapies targeting Aβ have largely failed. This highlights the need to alternate treatment strategies and a shift of focus to early pre-clinical stages. Approximately 25-40% of AD cases can be attributed to environmental factors including chronic stress. Gut dysbiosis has been associated with stress and the pathogenesis of AD and can increase both Aβ and NFTs in animal models of the disease. Both stress and enrichment have been shown to alter AD progression and gut health. Targeting stress-induced gut dysbiosis through probiotic supplementation could provide a promising intervention to delay disease progression. In this review, we discuss the effects of stress, enrichment, and gut dysbiosis in AD models and the promising evidence from probiotic intervention studies.
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Affiliation(s)
- Sarah E Torraville
- Biomedical Sciences, Faculty of Medicine, Memorial University of Newfoundland, St. John's, NL A1B 3V6, Canada
| | - Cassandra M Flynn
- Biomedical Sciences, Faculty of Medicine, Memorial University of Newfoundland, St. John's, NL A1B 3V6, Canada
| | - Tori L Kendall
- Biomedical Sciences, Faculty of Medicine, Memorial University of Newfoundland, St. John's, NL A1B 3V6, Canada
| | - Qi Yuan
- Biomedical Sciences, Faculty of Medicine, Memorial University of Newfoundland, St. John's, NL A1B 3V6, Canada
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Peripheral Regulation of Central Brain-Derived Neurotrophic Factor Expression through the Vagus Nerve. Int J Mol Sci 2023; 24:ijms24043543. [PMID: 36834953 PMCID: PMC9964523 DOI: 10.3390/ijms24043543] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Revised: 02/03/2023] [Accepted: 02/07/2023] [Indexed: 02/12/2023] Open
Abstract
The brain-derived neurotrophic factor (BDNF) is an extensively studied neurotrophin es sential for both developing the brain and maintaining adult brain function. In the adult hippocampus, BDNF is critical for maintaining adult neurogenesis. Adult hippocampal neurogenesis is involved not only in memory formation and learning ability, but also mood regulation and stress responses. Accordingly, decreased levels of BDNF, accompanied by low levels of adult neurogenesis, occurs in brains of older adults with impaired cognitive function and in those of patients with major depression disorder. Therefore, elucidating the mechanisms that maintain hippocampal BDNF levels is biologically and clinically important. It has been revealed that signalling from peripheral tissues contribute to the regulation of BDNF expression in the brain across the blood-brain barrier. Moreover, recent studies indicated evidence that neuronal pathways can also be a mechanism by which peripheral tissues signal to the brain for the regulation of BDNF expression. In this review, we give an overview of the current status in the regulation of central BDNF expression by peripheral signalling, with a special interest in the regulation of hippocampal BDNF levels by signals via the vagus nerve. Finally, we discuss the relationship between signalling from peripheral tissues and age-associated control of central BDNF expression.
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Donovan M, Mackey CS, Lynch MDJ, Platt GN, Brown AN, Washburn BK, Trickey DJ, Curtis JT, Liu Y, Charles TC, Wang Z, Jones KM. Limosilactobacillus reuteri administration alters the gut-brain-behavior axis in a sex-dependent manner in socially monogamous prairie voles. Front Microbiol 2023; 14:1015666. [PMID: 36846764 PMCID: PMC9945313 DOI: 10.3389/fmicb.2023.1015666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Accepted: 01/05/2023] [Indexed: 02/11/2023] Open
Abstract
Research on the role of gut microbiota in behavior has grown dramatically. The probiotic L. reuteri can alter social and stress-related behaviors - yet, the underlying mechanisms remain largely unknown. Although traditional laboratory rodents provide a foundation for examining the role of L. reuteri on the gut-brain axis, they do not naturally display a wide variety of social behaviors. Using the highly-social, monogamous prairie vole (Microtus ochrogaster), we examined the effects of L. reuteri administration on behaviors, neurochemical marker expression, and gut-microbiome composition. Females, but not males, treated with live L. reuteri displayed lower levels of social affiliation compared to those treated with heat-killed L. reuteri. Overall, females displayed a lower level of anxiety-like behaviors than males. Live L. reuteri-treated females had lower expression of corticotrophin releasing factor (CRF) and CRF type-2-receptor in the nucleus accumbens, and lower vasopressin 1a-receptor in the paraventricular nucleus of the hypothalamus (PVN), but increased CRF in the PVN. There were both baseline sex differences and sex-by-treatment differences in gut microbiome composition. Live L. reuteri increased the abundance of several taxa, including Enterobacteriaceae, Lachnospiraceae NK4A136, and Treponema. Interestingly, heat-killed L. reuteri increased abundance of the beneficial taxa Bifidobacteriaceae and Blautia. There were significant correlations between changes in microbiota, brain neurochemical markers, and behaviors. Our data indicate that L. reuteri impacts gut microbiota, gut-brain axis and behaviors in a sex-specific manner in socially-monogamous prairie voles. This demonstrates the utility of the prairie vole model for further examining causal impacts of microbiome on brain and behavior.
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Affiliation(s)
- Meghan Donovan
- Department of Psychology and Program in Neuroscience, Florida State University, Tallahassee, FL, United States
- Rocky Mountain Mental Illness Research Education and Clinical Center, Rocky Mountain Regional VA Medical Center, Aurora, CO, United States
- Department of Physical Medicine and Rehabilitation, University of Colorado Anschutz Medical Campus, Aurora, CO, United States
| | - Calvin S. Mackey
- Department of Biological Science, Florida State University, Tallahassee, FL, United States
| | - Michael D. J. Lynch
- Metagenom Bio Life Science Inc, Waterloo, ON, Canada
- Department of Biology, University of Waterloo, Waterloo, ON, Canada
| | - Grayson N. Platt
- Department of Psychology and Program in Neuroscience, Florida State University, Tallahassee, FL, United States
- Department of Biological Science, Florida State University, Tallahassee, FL, United States
| | - Amber N. Brown
- Department of Biological Science Core Facilities, Florida State University, Tallahassee, FL, United States
| | - Brian K. Washburn
- Department of Biological Science Core Facilities, Florida State University, Tallahassee, FL, United States
| | - Darryl J. Trickey
- Department of Biological Science, Florida State University, Tallahassee, FL, United States
| | - J. Thomas Curtis
- Department of Pharmacology and Physiology, Oklahoma State University Center for Health Sciences, Tulsa, OK, United States
| | - Yan Liu
- Department of Psychology and Program in Neuroscience, Florida State University, Tallahassee, FL, United States
| | - Trevor C. Charles
- Metagenom Bio Life Science Inc, Waterloo, ON, Canada
- Department of Biology, University of Waterloo, Waterloo, ON, Canada
| | - Zuoxin Wang
- Department of Psychology and Program in Neuroscience, Florida State University, Tallahassee, FL, United States
| | - Kathryn M. Jones
- Department of Biological Science, Florida State University, Tallahassee, FL, United States
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Salami M, Soheili M. The microbiota-gut- hippocampus axis. Front Neurosci 2022; 16:1065995. [PMID: 36620458 PMCID: PMC9817109 DOI: 10.3389/fnins.2022.1065995] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2022] [Accepted: 12/07/2022] [Indexed: 12/25/2022] Open
Abstract
Introduction It is well known that the intestinal bacteria substantially affect physiological processes in many body organs. Especially, through a bidirectional communication called as gut-microbiota-brain axis, the gut microbiota deeply influences development and function of the nervous system. Hippocampus, as a part of medial temporal lobe, is known to be involved in cognition, emotion, and anxiety. Growing evidence indicates that the hippocampus is a target of the gut microbiota. We used a broad search linking the hippocampus with the gut microbiota and probiotics. Methods All experimental studies and clinical trials published until end of 2021 were reviewed. Influence of the gut microbiota on the behavioral, electrophysiological, biochemical and histological aspects of the hippocampus were evaluated in this review. Results The effect of disrupted gut microbiota and probiotic supplements on the microbiota-hippocampus link is also considered. Studies show that a healthy gut microbiota is necessary for normal hippocampus dependent learning and memory and synaptic plasticity. The known current mechanisms are production and modulation of neurotrophins, neurotransmitters and receptors, regulation of intracellular molecular processes, normalizing the inflammatory/anti-inflammatory and oxidative/antioxidant factors, and histological stability of the hippocampus. Activity of the hippocampal neuronal circuits as well as behavioral functions of the hippocampus positively respond to different mixtures of probiotic bacteria. Discussion Growing evidence from animal researches indicate a close association between the hippocampus with the gut microbiota and probiotic bacteria as well. However, human studies and clinical trials verifying such a link are scant. Since the most of papers on this topic have been published over the past 3 years, intensive future research awaits.
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Dziedzic A, Saluk J. Probiotics and Commensal Gut Microbiota as the Effective Alternative Therapy for Multiple Sclerosis Patients Treatment. Int J Mol Sci 2022; 23:ijms232214478. [PMID: 36430954 PMCID: PMC9699268 DOI: 10.3390/ijms232214478] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Revised: 11/17/2022] [Accepted: 11/18/2022] [Indexed: 11/23/2022] Open
Abstract
The gut-brain axis (GBA) refers to the multifactorial interactions between the intestine microflora and the nervous, immune, and endocrine systems, connecting brain activity and gut functions. Alterations of the GBA have been revealed in people with multiple sclerosis (MS), suggesting a potential role in disease pathogenesis and making it a promising therapeutic target. Whilst research in this field is still in its infancy, a number of studies revealed that MS patients are more likely to exhibit modified microbiota, altered levels of short-chain fatty acids, and enhanced intestinal permeability. Both clinical and preclinical trials in patients with MS and animal models revealed that the administration of probiotic bacteria might improve cognitive, motor, and mental behaviors by modulation of GBA molecular pathways. According to the newest data, supplementation with probiotics may be associated with slower disability progression, reduced depressive symptoms, and improvements in general health in patients with MS. Herein, we give an overview of how probiotics supplementation may have a beneficial effect on the course of MS and its animal model. Hence, interference with the composition of the MS patient's intestinal microbiota may, in the future, be a grip point for the development of diagnostic tools and personalized microbiota-based adjuvant therapy.
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Liu G, Khan I, Li Y, Yang Y, Lu X, Wang Y, Li J, Zhang C. Overcoming Anxiety Disorder by Probiotic Lactiplantibacillus plantarum LZU-J-TSL6 through Regulating Intestinal Homeostasis. Foods 2022; 11:foods11223596. [PMID: 36429192 PMCID: PMC9689226 DOI: 10.3390/foods11223596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 10/14/2022] [Accepted: 11/04/2022] [Indexed: 11/16/2022] Open
Abstract
Lactiplantibacillus plantarum LZU-J-TSL6 with high γ-aminobutyric acid (GABA) production (3.838 g/L) was screened and isolated from the Chinese fermented food snack “Jiangshui”. The improvement effect on anxiety disorder was explored using mice as animal models. In vitro results revealed that LZU-J-TSL6 had the potential to colonize the intestine (p < 0.01) and the anxiety-like behavior of the mice after seven days’ gavage with LZU-J-TSL6 was significantly improved (p < 0.01) when compared to the model group. LZU-J-TSL6 was able to effectively increase the GABA content in the mice hippocampus (p < 0.0001) and restore some markers related to anxiety such as brain-derived neurotrophic factor (BDNF), glial fibrillary acidic protein (GFAP), and 5-hydroxytryptamine (5-HT). Simultaneously, it had a certain repair effect on Nissl bodies and colon tissue in mice hippocampus. In addition, LZU-J-TSL6 increased the relative abundance of beneficial bacteria Bacteroides and Muribaculum, thereby regulating the imbalance of intestinal microbiota caused by anxiety disorder. It also affects the nerve pathway and intestinal mucosal barrier by increasing the content of glutamine and γ-aminobutyric acid and other related metabolites, thereby improving anxiety. Therefore, the GABA-producing Lactobacillus plantus LZU-J-TSL6 can be used as a probiotic to exert an indirect or direct anti-anxiety effect by maintaining the balance of the intestinal environment, producing related metabolites that affect nerve pathways and repair the intestinal mucosal barrier. It can be used as an adjuvant treatment to improve anxiety disorders.
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Affiliation(s)
- Guanlan Liu
- School of Life Sciences, Lanzhou University, Lanzhou 730000, China
- Key Laboratory of Cell Activities and Stress Adaptations, Ministry of Education, Lanzhou University, Lanzhou 730000, China
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, Lanzhou University, Lanzhou 730000, China
| | - Israr Khan
- School of Life Sciences, Lanzhou University, Lanzhou 730000, China
- Key Laboratory of Cell Activities and Stress Adaptations, Ministry of Education, Lanzhou University, Lanzhou 730000, China
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, Lanzhou University, Lanzhou 730000, China
| | - Yuxi Li
- School of Life Sciences, Lanzhou University, Lanzhou 730000, China
- Key Laboratory of Cell Activities and Stress Adaptations, Ministry of Education, Lanzhou University, Lanzhou 730000, China
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, Lanzhou University, Lanzhou 730000, China
| | - Yun Yang
- School of Pharmacy, Lanzhou University, Lanzhou 730000, China
| | - Xuerui Lu
- School of Pharmacy, Lanzhou University, Lanzhou 730000, China
| | - Yafei Wang
- School of Pharmacy, Lanzhou University, Lanzhou 730000, China
| | - Junxiang Li
- School of Pharmacy, Lanzhou University, Lanzhou 730000, China
| | - Chunjiang Zhang
- School of Life Sciences, Lanzhou University, Lanzhou 730000, China
- Key Laboratory of Cell Activities and Stress Adaptations, Ministry of Education, Lanzhou University, Lanzhou 730000, China
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, Lanzhou University, Lanzhou 730000, China
- Gansu Key Laboratory of Functional Genomics and Molecular Diagnosis, Lanzhou University, Lanzhou 730000, China
- Correspondence:
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Kim H, Jeon S, Kim J, Seol D, Jo J, Cho S, Kim H. Investigation of memory-enhancing effects of Streptococcus thermophilus EG007 in mice and elucidating molecular and metagenomic characteristics using nanopore sequencing. Sci Rep 2022; 12:13274. [PMID: 35918353 PMCID: PMC9346115 DOI: 10.1038/s41598-022-14837-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Accepted: 06/13/2022] [Indexed: 11/15/2022] Open
Abstract
Over the past decades, accumulating evidences have highlighted the gut microbiota as a key player in the brain functioning via microbiota–gut–brain axis, and accordingly, the beneficial role of several probiotic strains in cognitive ability also have been actively investigated. However, the majority of the research have demonstrated the effects against age-related cognitive decline or neurological disease. To this end, we aimed to investigate lactic acid bacteria strains having beneficial effects on the cognitive function of healthy young mice and elucidate underlying characteristics by carrying out nanopore sequencing-based genomics and metagenomics analysis. 8-week consumption of Streptococcus thermophilus EG007 demonstrated marked enhancements in behavior tests assessing short-term spatial and non-spatial learning and memory. It was revealed that EG007 possessed genes encoding various metabolites beneficial for a health condition in many aspects, including gamma-aminobutyric acid producing system, a neurotransmitter associated with mood and stress response. Also, by utilizing 16S–23S rRNA operon as a taxonomic marker, we identified more accurate species-level compositional changes in gut microbiota, which was increase of certain species, previously reported to have associations with mental health or down-regulation of inflammation or infection-related species. Moreover, correlation analysis revealed that the EG007-mediated altered microbiota had a significant correlation with the memory traits.
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Affiliation(s)
- Hyaekang Kim
- Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, 08826, Republic of Korea
| | - Soomin Jeon
- Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, 08826, Republic of Korea
| | - Jina Kim
- Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, 08826, Republic of Korea
| | - Donghyeok Seol
- Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, 08826, Republic of Korea.,eGnome, Inc, Seoul, Republic of Korea
| | - JinChul Jo
- Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, 08826, Republic of Korea
| | - Seoae Cho
- eGnome, Inc, Seoul, Republic of Korea
| | - Heebal Kim
- Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, 08826, Republic of Korea. .,eGnome, Inc, Seoul, Republic of Korea.
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15
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MahmoudianDehkordi S, Bhattacharyya S, Brydges CR, Jia W, Fiehn O, Rush AJ, Dunlop BW, Kaddurah-Daouk R. Gut Microbiome-Linked Metabolites in the Pathobiology of Major Depression With or Without Anxiety—A Role for Bile Acids. Front Neurosci 2022; 16:937906. [PMID: 35937867 PMCID: PMC9350527 DOI: 10.3389/fnins.2022.937906] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Accepted: 06/24/2022] [Indexed: 12/12/2022] Open
Abstract
Background The gut microbiome may play a role in the pathogenesis of neuropsychiatric diseases including major depressive disorder (MDD). Bile acids (BAs) are steroid acids that are synthesized in the liver from cholesterol and further processed by gut-bacterial enzymes, thus requiring both human and gut microbiome enzymatic processes in their metabolism. BAs participate in a range of important host functions such as lipid transport and metabolism, cellular signaling and regulation of energy homeostasis. BAs have recently been implicated in the pathophysiology of Alzheimer's and several other neuropsychiatric diseases, but the biochemical underpinnings of these gut microbiome-linked metabolites in the pathophysiology of depression and anxiety remains largely unknown. Method Using targeted metabolomics, we profiled primary and secondary BAs in the baseline serum samples of 208 untreated outpatients with MDD. We assessed the relationship of BA concentrations and the severity of depressive and anxiety symptoms as defined by the 17-item Hamilton Depression Rating Scale (HRSD17) and the 14-item Hamilton Anxiety Rating Scale (HRSA-Total), respectively. We also evaluated whether the baseline metabolic profile of BA informs about treatment outcomes. Results The concentration of the primary BA chenodeoxycholic acid (CDCA) was significantly lower at baseline in both severely depressed (log2 fold difference (LFD) = −0.48; p = 0.021) and highly anxious (LFD = −0.43; p = 0.021) participants compared to participants with less severe symptoms. The gut bacteria-derived secondary BAs produced from CDCA such as lithocholic acid (LCA) and several of its metabolites, and their ratios to primary BAs, were significantly higher in the more anxious participants (LFD's range = [0.23, 1.36]; p's range = [6.85E-6, 1.86E-2]). The interaction analysis of HRSD17 and HRSA-Total suggested that the BA concentration differences were more strongly correlated to the symptoms of anxiety than depression. Significant differences in baseline CDCA (LFD = −0.87, p = 0.0009), isoLCA (LFD = −1.08, p = 0.016) and several BA ratios (LFD's range [0.46, 1.66], p's range [0.0003, 0.049]) differentiated treatment failures from remitters. Conclusion In patients with MDD, BA profiles representing changes in gut microbiome compositions are associated with higher levels of anxiety and increased probability of first-line treatment failure. If confirmed, these findings suggest the possibility of developing gut microbiome-directed therapies for MDD characterized by gut dysbiosis.
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Affiliation(s)
- Siamak MahmoudianDehkordi
- Department of Psychiatry and Behavioral Sciences, Duke University School of Medicine, Durham, NC, United States
| | - Sudeepa Bhattacharyya
- Department of Biological Sciences, Arkansas Biosciences Institute, Arkansas State University, Jonesboro, AR, United States
| | - Christopher R. Brydges
- West Coast Metabolomics Center, University of California, Davis, Davis, CA, United States
| | - Wei Jia
- HKBU Phenome Research Centre, School of Chinese Medicine, Hong Kong Baptist University, Kowloon, Hong Kong SAR, China
| | - Oliver Fiehn
- West Coast Metabolomics Center, University of California, Davis, Davis, CA, United States
| | - A. John Rush
- Department of Psychiatry and Behavioral Sciences, Duke University School of Medicine, Durham, NC, United States
- Department of Psychiatry, Health Sciences Center, Texas Tech University, Odessa, Ukraine
- Duke-National University of Singapore, Singapore, Singapore
| | - Boadie W. Dunlop
- Department of Psychiatry and Behavioral Sciences, Emory University School of Medicine, Atlanta, GA, United States
- *Correspondence: Boadie W. Dunlop
| | - Rima Kaddurah-Daouk
- Department of Psychiatry and Behavioral Sciences, Duke University School of Medicine, Durham, NC, United States
- Department of Medicine, Duke University, Durham, NC, United States
- Duke Institute of Brain Sciences, Duke University, Durham, NC, United States
- Rima Kaddurah-Daouk
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Kolesnikova IM, Gaponov AM, Roumiantsev SA, Ganenko LA, Volkova NI, Grigoryeva TV, Laikov AV, Makarov VV, Yudin SM, Shestopalov AV. Relationship between Neutrophins and Gut Microbiome in Various Metabolic Types of Obesity. J EVOL BIOCHEM PHYS+ 2022. [DOI: 10.1134/s0022093022040056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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17
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Zhu J, Wang C, Qian Y, Cai H, Zhang S, Zhang C, Zhao W, Zhang T, Zhang B, Chen J, Liu S, Yu Y. Multimodal neuroimaging fusion biomarkers mediate the association between gut microbiota and cognition. Prog Neuropsychopharmacol Biol Psychiatry 2022; 113:110468. [PMID: 34736997 DOI: 10.1016/j.pnpbp.2021.110468] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Revised: 10/25/2021] [Accepted: 10/29/2021] [Indexed: 02/06/2023]
Abstract
Background The field of microbiota-gut-brain research in animals has progressed, while the exact nature of gut microbiota-brain-cognition relationship in humans is not completely elucidated, likely due to small sample sizes and single neuroimaging modality utilized to delineate limited aspects of the brain. We aimed to comprehensively investigate such association in a large sample using multimodal MRI. Methods Fecal samples were collected from 157 healthy young adults and 16S sequencing was used to assess gut microbial diversity and enterotypes. Five brain imaging measures, including regional homogeneity (ReHo) and functional connectivity density (FCD) from resting-state functional MRI, cerebral blood flow (CBF) from arterial spin labeling, gray matter volume (GMV) from structural MRI, and fractional anisotropy (FA) from diffusion tensor imaging, were jointly analyzed with a data-driven multivariate fusion method. Cognition was evaluated by 3-back and digit span tasks. Results We found significant associations of gut microbial diversity with ReHo, FCD, CBF, and GMV within the frontoparietal, default mode and visual networks, as well as with FA in a distributed set of juxtacortical white matter regions. In addition, there were FCD, CBF, GMV, and FA differences between Prevotella- versus Bacteroides-enterotypes in females and between Prevotella- versus Ruminococcaceae-enterotypes in males. Moreover, the identified neuroimaging fusion biomarkers could mediate the associations between microbial diversity and cognition. Conclusions Our findings not only expand existing knowledge of the microbiota-gut-brain axis, but also have potential clinical and translational implications by exposing the gut microbiota as a promising treatment and prevention target for cognitive impairment and related brain disorders.
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Affiliation(s)
- Jiajia Zhu
- Department of Radiology, The First Affiliated Hospital of Anhui Medical University, Hefei 230022, China; Research Center of Clinical Medical Imaging, Anhui Province, Hefei 230032, China; Anhui Provincial Institute of Translational Medicine, Hefei 230032, China
| | - Chunli Wang
- Department of Clinical Laboratory, The First Affiliated Hospital of Anhui Medical University, Hefei 230022, China
| | - Yinfeng Qian
- Department of Radiology, The First Affiliated Hospital of Anhui Medical University, Hefei 230022, China; Research Center of Clinical Medical Imaging, Anhui Province, Hefei 230032, China; Anhui Provincial Institute of Translational Medicine, Hefei 230032, China
| | - Huanhuan Cai
- Department of Radiology, The First Affiliated Hospital of Anhui Medical University, Hefei 230022, China; Research Center of Clinical Medical Imaging, Anhui Province, Hefei 230032, China; Anhui Provincial Institute of Translational Medicine, Hefei 230032, China
| | - Shujun Zhang
- Department of Radiology, The First Affiliated Hospital of Anhui Medical University, Hefei 230022, China; Research Center of Clinical Medical Imaging, Anhui Province, Hefei 230032, China; Anhui Provincial Institute of Translational Medicine, Hefei 230032, China
| | - Cun Zhang
- Department of Radiology, The First Affiliated Hospital of Anhui Medical University, Hefei 230022, China; Research Center of Clinical Medical Imaging, Anhui Province, Hefei 230032, China; Anhui Provincial Institute of Translational Medicine, Hefei 230032, China
| | - Wenming Zhao
- Department of Radiology, The First Affiliated Hospital of Anhui Medical University, Hefei 230022, China; Research Center of Clinical Medical Imaging, Anhui Province, Hefei 230032, China; Anhui Provincial Institute of Translational Medicine, Hefei 230032, China
| | - Tingting Zhang
- Department of Radiology, The First Affiliated Hospital of Anhui Medical University, Hefei 230022, China; Research Center of Clinical Medical Imaging, Anhui Province, Hefei 230032, China; Anhui Provincial Institute of Translational Medicine, Hefei 230032, China
| | - Biao Zhang
- Department of Radiology, The First Affiliated Hospital of Anhui Medical University, Hefei 230022, China; Research Center of Clinical Medical Imaging, Anhui Province, Hefei 230032, China; Anhui Provincial Institute of Translational Medicine, Hefei 230032, China
| | - Jingyao Chen
- Department of Radiology, The First Affiliated Hospital of Anhui Medical University, Hefei 230022, China; Research Center of Clinical Medical Imaging, Anhui Province, Hefei 230032, China; Anhui Provincial Institute of Translational Medicine, Hefei 230032, China
| | - Siyu Liu
- Department of Radiology, The First Affiliated Hospital of Anhui Medical University, Hefei 230022, China; Research Center of Clinical Medical Imaging, Anhui Province, Hefei 230032, China; Anhui Provincial Institute of Translational Medicine, Hefei 230032, China
| | - Yongqiang Yu
- Department of Radiology, The First Affiliated Hospital of Anhui Medical University, Hefei 230022, China; Research Center of Clinical Medical Imaging, Anhui Province, Hefei 230032, China; Anhui Provincial Institute of Translational Medicine, Hefei 230032, China.
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Mousa WK, Chehadeh F, Husband S. Recent Advances in Understanding the Structure and Function of the Human Microbiome. Front Microbiol 2022; 13:825338. [PMID: 35185849 PMCID: PMC8851206 DOI: 10.3389/fmicb.2022.825338] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Accepted: 01/11/2022] [Indexed: 12/11/2022] Open
Abstract
Trillions of microbes live within our bodies in a deep symbiotic relationship. Microbial populations vary across body sites, driven by differences in the environment, immunological factors, and interactions between microbial species. Major advances in genome sequencing enable a better understanding of microbiome composition. However, most of the microbial taxa and species of the human microbiome are still unknown. Without revealing the identity of these microbes as a first step, we cannot appreciate their role in human health and diseases. A shift in the microbial balance, termed dysbiosis, is linked to a broad range of diseases from simple colitis and indigestion to cancer and dementia. The last decade has witnessed an explosion in microbiome research that led to a better understanding of the microbiome structure and function. This understanding leads to potential opportunities to develop next-generation microbiome-based drugs and diagnostic biomarkers. However, our understanding is limited given the highly personalized nature of the microbiome and its complex and multidirectional interactions with the host. In this review, we discuss: (1) our current knowledge of microbiome structure and factors that shape the microbial composition, (2) recent associations between microbiome dysbiosis and diseases, and (3) opportunities of new microbiome-based therapeutics. We analyze common themes, promises, gaps, and challenges of the microbiome research.
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Affiliation(s)
- Walaa K. Mousa
- College of Pharmacy, Al Ain University of Science and Technology, Al Ain, United Arab Emirates
- Department of Biology, Whitman College, Walla Walla, WA, United States
- College of Pharmacy, Mansoura University, Mansoura, Egypt
| | - Fadia Chehadeh
- Department of Biology, Whitman College, Walla Walla, WA, United States
| | - Shannon Husband
- Department of Biology, Whitman College, Walla Walla, WA, United States
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19
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The Influence of Gut Microbiota on Neurogenesis: Evidence and Hopes. Cells 2022; 11:cells11030382. [PMID: 35159192 PMCID: PMC8834402 DOI: 10.3390/cells11030382] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Revised: 01/19/2022] [Accepted: 01/20/2022] [Indexed: 02/01/2023] Open
Abstract
Adult neurogenesis (i.e., the life-long generation of new neurons from undifferentiated neuronal precursors in the adult brain) may contribute to brain repair after damage, and participates in plasticity-related processes including memory, cognition, mood and sensory functions. Among the many intrinsic (oxidative stress, inflammation, and ageing), and extrinsic (environmental pollution, lifestyle, and diet) factors deemed to impact neurogenesis, significant attention has been recently attracted by the myriad of saprophytic microorganismal communities inhabiting the intestinal ecosystem and collectively referred to as the gut microbiota. A growing body of evidence, mainly from animal studies, reveal the influence of microbiota and its disease-associated imbalances on neural stem cell proliferative and differentiative activities in brain neurogenic niches. On the other hand, the long-claimed pro-neurogenic activity of natural dietary compounds endowed with antioxidants and anti-inflammatory properties (such as polyphenols, polyunsaturated fatty acids, or pro/prebiotics) may be mediated, at least in part, by their action on the intestinal microflora. The purpose of this review is to summarise the available information regarding the influence of the gut microbiota on neurogenesis, analyse the possible underlying mechanisms, and discuss the potential implications of this emerging knowledge for the fight against neurodegeneration and brain ageing.
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20
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Liu C, Yang SY, Wang L, Zhou F. The gut microbiome: implications for neurogenesis and neurological diseases. Neural Regen Res 2022; 17:53-58. [PMID: 34100427 PMCID: PMC8451566 DOI: 10.4103/1673-5374.315227] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
There is an increasing recognition of the strong links between the gut microbiome and the brain, and there is persuasive evidence that the gut microbiome plays a role in a variety of physiological processes in the central nervous system. This review summarizes findings that gut microbial composition alterations are linked to hippocampal neurogenesis, as well as the possible mechanisms of action; the existing literature suggests that microbiota influence neurogenic processes, which can result in neurological disorders. We consider this evidence from the perspectives of neuroinflammation, microbial-derived metabolites, neurotrophins, and neurotransmitters. Based on the existing research, we propose that the administration of probiotics can normalize the gut microbiome. This could therefore also represent a promising treatment strategy to counteract neurological impairment.
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Affiliation(s)
- Cheng Liu
- Department of Healthcare Administration, College of Medical and Health Science, Asia University, Taichung, Taiwan, China
| | - Shang-Yu Yang
- Department of Healthcare Administration, College of Medical and Health Science, Asia University, Taichung, Taiwan, China
| | - Long Wang
- Department of Anesthesiology, Renmin Hospital of Wuhan University, Wuhan, Hubei Province, China
| | - Fang Zhou
- Department of Anesthesiology, Renmin Hospital of Wuhan University, Wuhan, Hubei Province, China
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21
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Mahalakshmi AM, Ray B, Tuladhar S, Hediyal TA, Raj P, Rathipriya AG, Qoronfleh MW, Essa MM, Chidambaram SB. Impact of Pharmacological and Non-Pharmacological Modulators on Dendritic Spines Structure and Functions in Brain. Cells 2021; 10:3405. [PMID: 34943913 PMCID: PMC8699406 DOI: 10.3390/cells10123405] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Revised: 11/27/2021] [Accepted: 11/29/2021] [Indexed: 12/12/2022] Open
Abstract
Dendritic spines are small, thin, hair-like protrusions found on the dendritic processes of neurons. They serve as independent compartments providing large amplitudes of Ca2+ signals to achieve synaptic plasticity, provide sites for newer synapses, facilitate learning and memory. One of the common and severe complication of neurodegenerative disease is cognitive impairment, which is said to be closely associated with spine pathologies viz., decreased in spine density, spine length, spine volume, spine size etc. Many treatments targeting neurological diseases have shown to improve the spine structure and distribution. However, concise data on the various modulators of dendritic spines are imperative and a need of the hour. Hence, in this review we made an attempt to consolidate the effects of various pharmacological (cholinergic, glutamatergic, GABAergic, serotonergic, adrenergic, and dopaminergic agents) and non-pharmacological modulators (dietary interventions, enriched environment, yoga and meditation) on dendritic spines structure and functions. These data suggest that both the pharmacological and non-pharmacological modulators produced significant improvement in dendritic spine structure and functions and in turn reversing the pathologies underlying neurodegeneration. Intriguingly, the non-pharmacological approaches have shown to improve intellectual performances both in preclinical and clinical platforms, but still more technology-based evidence needs to be studied. Thus, we conclude that a combination of pharmacological and non-pharmacological intervention may restore cognitive performance synergistically via improving dendritic spine number and functions in various neurological disorders.
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Affiliation(s)
- Arehally M. Mahalakshmi
- Department of Pharmacology, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Mysuru 570015, Karnataka, India; (A.M.M.); (B.R.); (S.T.); (T.A.H.); (P.R.)
- SIG-Brain, Behaviour and Cognitive Neurosciences Research (BBRC), JSS Academy of Higher Education & Research, Mysuru 570015, Karnataka, India
| | - Bipul Ray
- Department of Pharmacology, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Mysuru 570015, Karnataka, India; (A.M.M.); (B.R.); (S.T.); (T.A.H.); (P.R.)
- Centre for Experimental Pharmacology and Toxicology, Central Animal Facility, JSS Academy of Higher Education & Research, Mysuru 570015, Karnataka, India
| | - Sunanda Tuladhar
- Department of Pharmacology, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Mysuru 570015, Karnataka, India; (A.M.M.); (B.R.); (S.T.); (T.A.H.); (P.R.)
- Centre for Experimental Pharmacology and Toxicology, Central Animal Facility, JSS Academy of Higher Education & Research, Mysuru 570015, Karnataka, India
| | - Tousif Ahmed Hediyal
- Department of Pharmacology, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Mysuru 570015, Karnataka, India; (A.M.M.); (B.R.); (S.T.); (T.A.H.); (P.R.)
- Centre for Experimental Pharmacology and Toxicology, Central Animal Facility, JSS Academy of Higher Education & Research, Mysuru 570015, Karnataka, India
| | - Praveen Raj
- Department of Pharmacology, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Mysuru 570015, Karnataka, India; (A.M.M.); (B.R.); (S.T.); (T.A.H.); (P.R.)
| | | | - M. Walid Qoronfleh
- Q3CG Research Institute (QRI), Research and Policy Division, 7227 Rachel Drive, Ypsilanti, MI 48917, USA;
| | - Musthafa Mohamed Essa
- Department of Food Science and Nutrition, CAMS, Sultan Qaboos University, Muscat 123, Oman
- Ageing and Dementia Research Group, Sultan Qaboos University, Muscat 123, Oman
- Biomedical Sciences Department, University of Pacific, Sacramento, CA 95211, USA
| | - Saravana Babu Chidambaram
- Department of Pharmacology, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Mysuru 570015, Karnataka, India; (A.M.M.); (B.R.); (S.T.); (T.A.H.); (P.R.)
- SIG-Brain, Behaviour and Cognitive Neurosciences Research (BBRC), JSS Academy of Higher Education & Research, Mysuru 570015, Karnataka, India
- Centre for Experimental Pharmacology and Toxicology, Central Animal Facility, JSS Academy of Higher Education & Research, Mysuru 570015, Karnataka, India
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22
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Ashwin K, Pattanaik AK, Howarth GS. Polyphenolic bioactives as an emerging group of nutraceuticals for promotion of gut health: A review. FOOD BIOSCI 2021. [DOI: 10.1016/j.fbio.2021.101376] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Sefiani A, Geoffroy CG. The Potential Role of Inflammation in Modulating Endogenous Hippocampal Neurogenesis After Spinal Cord Injury. Front Neurosci 2021; 15:682259. [PMID: 34220440 PMCID: PMC8249862 DOI: 10.3389/fnins.2021.682259] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Accepted: 05/17/2021] [Indexed: 12/24/2022] Open
Abstract
Currently there are approximately 291,000 people suffering from a spinal cord injury (SCI) in the United States. SCI is associated with traumatic changes in mobility and neuralgia, as well as many other long-term chronic health complications, including metabolic disorders, diabetes mellitus, non-alcoholic steatohepatitis, osteoporosis, and elevated inflammatory markers. Due to medical advances, patients with SCI survive much longer than previously. This increase in life expectancy exposes them to novel neurological complications such as memory loss, cognitive decline, depression, and Alzheimer's disease. In fact, these usually age-associated disorders are more prevalent in people living with SCI. A common factor of these disorders is the reduction in hippocampal neurogenesis. Inflammation, which is elevated after SCI, plays a major role in modulating hippocampal neurogenesis. While there is no clear consensus on the mechanism of the decline in hippocampal neurogenesis and cognition after SCI, we will examine in this review how SCI-induced inflammation could modulate hippocampal neurogenesis and provoke age-associated neurological disorders. Thereafter, we will discuss possible therapeutic options which may mitigate the influence of SCI associated complications on hippocampal neurogenesis.
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Peng Y, Tao H, Wang S, Xiao J, Wang Y, Su H. Dietary intervention with edible medicinal plants and derived products for prevention of Alzheimer's disease: A compendium of time-tested strategy. J Funct Foods 2021. [DOI: 10.1016/j.jff.2021.104463] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
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25
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Shamsipour S, Sharifi G, Taghian F. Impact of interval training with probiotic (L. plantarum / Bifidobacterium bifidum) on passive avoidance test, ChAT and BDNF in the hippocampus of rats with Alzheimer's disease. Neurosci Lett 2021; 756:135949. [PMID: 33974953 DOI: 10.1016/j.neulet.2021.135949] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 04/20/2021] [Accepted: 05/06/2021] [Indexed: 02/05/2023]
Abstract
It has been suggested that gut microbiota dysbiosis can lead to Alzheimer's disease (AD), inducing the production of many AD-related pre-inflammatory cytokines. On the other hand, daily probiotic administration and regular exercise training are assumed to improve clinical AD-related symptoms. To take this line of research further, this study was aimed at investigating the impact of moderate-intensity interval training (MIIT) with a combined administration of Lactobacillus plantarum and Bifidobacterium bifidum (probiotic, BROB) on the passive avoidance test (Shuttle Box), choline acetyltransferase (ChAT) and the brain derived neurotrophic factor (BDNF) in the hippocampus of a rat model of AD. Forty male Wistar rats (280 ± 20 g) were divided into five groups (n = 8 in each) of control, amyloid beta peptide (Aβ), Aβ + MIIT (AD rats undergoing MIIT), Aβ + PROB (AD rats fed Lactobacillus plantarum and Bifidobacterium bifidum), and Aβ + MIIT + PROB (AD rats receiving both treatments). AD was induced by the intra-cerebroventricular injection of Aβ1-42 peptide. MIIT was performed on rodent treadmill for 8 weeks (5 days per week). The probiotic was also fed daily to the related groups for 8 weeks. BDNF and ChAT in the hippocampus were measured by real time PCR (RT-PCR) and immunohistochemistry (IHC), respectively. Cresyl violet staining of brain tissue was performed to evaluate the dead cells. Results of tissue staining showed that the induction of the Alzheimer's led to the destruction of hippocampal cells and induced neurodegeneration (p = 0.001). Results of the shuttle box test showed that short-term memory was improved in the Aβ + MIIT + PROB group compared to the Aβ group, while death cells (dark cells) were decreased in all the other three groups (MIIT, BROB, and Aβ + MIIT + PROB). Levels of ChAT as well as the BDNF mRNA in the Aβ + MIIT + PROB group showed a significant increase compared to the Aβ group. In conclusion, it seems that the use of the combined administration of Lactobacillus plantarum and Bifidobacterium bifidum with interval aerobic exercise can have neuroprotective effects on AD.
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Affiliation(s)
- Samaneh Shamsipour
- Department of Physical Education and Sport Sciences, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran
| | - Gholamreza Sharifi
- Department of Physical Education and Sport Sciences, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran.
| | - Farzaneh Taghian
- Department of Physical Education and Sport Sciences, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran
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26
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Stoneham ET, McHail DG, Samipour-Biel S, Liehr N, Lee CM, Evans JC, Boggs K, Dumas TC. Spatial Learning Is Impaired in Male Pubertal Rats Following Neonatal Daily but Not Randomly Spaced Maternal Deprivation. Front Cell Dev Biol 2021; 9:621308. [PMID: 33816470 PMCID: PMC8012507 DOI: 10.3389/fcell.2021.621308] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Accepted: 02/26/2021] [Indexed: 01/06/2023] Open
Abstract
Severe early life stress has long been associated with neuropsychological disorders in adulthood, including depression, schizophrenia, post-traumatic stress disorder, and memory dysfunction. To some extent, all of these conditions involve dysregulation of the hypothalamic-pituitary-adrenal (HPA) axis and reduced negative feedback inhibition of cortisol release in adulthood. However, the time course for mental health and hormonal outcomes across life stages and the attributes of early life stress that direct the behavioral and biological alterations is not fully understood. We designed our studies to compare outcomes of the two most common maternal deprivation schedules on cognitive ability prior to adulthood. We exposed rat pups to daily or randomly spaced maternal separation bouts within the first 3 weeks of life and examined cognitive performance, neurotrophic signaling, and stress and immune system markers during puberty. We found that the daily separation schedule impaired spatial learning while the randomly spaced schedule did not alter maze performance relative to normally reared control animals. Animals that underwent daily separation showed a tendency for reduced body weight compared to the randomly spaced condition, but there were no differences in adrenal weight. Thymus weight normalized by body weight was increased following daily separation compared to random separation and control conditions. Plasma corticosterone levels measured after behavior testing did not differ amongst experimental groups and there was no impact of TrKB receptor inhibition. Combined, the results show that different early life stress schedules produce different behavioral and biological outcomes when measured at puberty. Combined with prior findings from more mature animals, the results presented here suggest that daily neonatal stress produces varied alterations in spatial cognition at different life stages with a transient learning deficit at puberty preceding a more persistent and a progressive memory impairment through adulthood and into aging.
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Affiliation(s)
- Emily T Stoneham
- Krasnow Institute for Advanced Studies, George Mason University, Fairfax, VA, United States
| | - Daniel G McHail
- Krasnow Institute for Advanced Studies, George Mason University, Fairfax, VA, United States
| | | | - Nicole Liehr
- George Mason University, Fairfax, VA, United States
| | | | | | | | - Theodore C Dumas
- Krasnow Institute for Advanced Studies, George Mason University, Fairfax, VA, United States
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27
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Salami M. Interplay of Good Bacteria and Central Nervous System: Cognitive Aspects and Mechanistic Considerations. Front Neurosci 2021; 15:613120. [PMID: 33642976 PMCID: PMC7904897 DOI: 10.3389/fnins.2021.613120] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Accepted: 01/06/2021] [Indexed: 12/12/2022] Open
Abstract
The human gastrointestinal tract hosts trillions of microorganisms that is called “gut microbiota.” The gut microbiota is involved in a wide variety of physiological features and functions of the body. Thus, it is not surprising that any damage to the gut microbiota is associated with disorders in different body systems. Probiotics, defined as living microorganisms with health benefits for the host, can support or restore the composition of the gut microbiota. Numerous investigations have proved a relationship between the gut microbiota with normal brain function as well as many brain diseases, in which cognitive dysfunction is a common clinical problem. On the other hand, increasing evidence suggests that the existence of a healthy gut microbiota is crucial for normal cognitive processing. In this regard, interplay of the gut microbiota and cognition has been under focus of recent researches. In the present paper, I review findings of the studies considering beneficial effects of either gut microbiota or probiotic bacteria on the brain cognitive function in the healthy and disease statuses.
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Affiliation(s)
- Mahmoud Salami
- Physiology Research Center, Institute for Basic Sciences, Kashan University of Medical Sciences, Kashan, Iran.,Department of Neuroscience, Graduate School of Medicine, Kyoto University, Kyoto, Japan
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28
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Updated Review and Meta-Analysis of Probiotics for the Treatment of Clinical Depression: Adjunctive vs. Stand-Alone Treatment. J Clin Med 2021; 10:jcm10040647. [PMID: 33567631 PMCID: PMC7915600 DOI: 10.3390/jcm10040647] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Revised: 02/01/2021] [Accepted: 02/03/2021] [Indexed: 01/07/2023] Open
Abstract
Recent years have seen a rapid increase in the use of gut microbiota-targeting interventions, such as probiotics, for the treatment of psychiatric disorders. The objective of this update review was to evaluate all randomised controlled clinical trial evidence on the efficacy of probiotics for clinical depression. Cochrane guidelines for updated reviews were followed. By searching PubMed and Web of Science databases, we identified 546 new records since our previous review. A total of seven studies met selection criteria, capturing 404 people with depression. A random effects meta-analysis using treatment type (stand-alone vs. adjunctive) as subgroup was performed. The results demonstrated that probiotics are effective in reducing depressive symptoms when administered in addition to antidepressants (SMD = 0.83, 95%CI 0.49-1.17), however, they do not seem to offer significant benefits when used as stand-alone treatment (SMD = -0.02, 95%CI -0.34-0.30). Potential mechanisms of action may be via increases in brain-derived neurotrophic factor (BDNF) and decreases in C-reactive protein (CRP), although limited evidence is available at present. This review offers stronger evidence to support the clinical use of probiotics in depressed populations and provides an insight into the mode of administration more likely to yield antidepressant effects.
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29
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Darch HT, Collins MK, O'Riordan KJ, Cryan JF. Microbial memories: Sex-dependent impact of the gut microbiome on hippocampal plasticity. Eur J Neurosci 2021; 54:5235-5244. [PMID: 33458858 PMCID: PMC8451864 DOI: 10.1111/ejn.15119] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 01/06/2021] [Accepted: 01/06/2021] [Indexed: 02/06/2023]
Abstract
Germ‐free rodents, raised in the absence of a measurable gut microbiome, have been a key model to study the microbiome‐gut‐brain axis. Germ‐free mice exhibit marked behavioural and neurochemical differences to their conventionally raised counterparts. It is as yet unclear how these neurochemical differences lead to the behavioural differences. Here, we test the electrophysiological properties of hippocampal plasticity in adult germ‐free mice and compare them to conventionally raised counterparts. Whilst basal synaptic efficacy and pre‐synaptic short‐term plasticity appear normal, we find a striking alteration of hippocampal long‐term potentiation specifically in male germ‐free slices. However, the spike output of these neurons remains normal along with altered input‐output coupling, potentially indicating homeostatic compensatory mechanisms, or an altered excitation/inhibition balance. To our knowledge this is the first time the electrophysiological properties of the hippocampus have been assessed in a microbiome deficient animal. Our data indicate that the absence of a microbiome alters integration of dendritic signalling in the CA1 region in mice.
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Affiliation(s)
- Henry T Darch
- APC Microbiome Ireland, University College Cork, Cork, Ireland
| | | | | | - John F Cryan
- APC Microbiome Ireland, University College Cork, Cork, Ireland.,Anatomy & Neuroscience, University College Cork, Cork, Ireland
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30
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Simpson CA, Diaz-Arteche C, Eliby D, Schwartz OS, Simmons JG, Cowan CSM. The gut microbiota in anxiety and depression - A systematic review. Clin Psychol Rev 2020; 83:101943. [PMID: 33271426 DOI: 10.1016/j.cpr.2020.101943] [Citation(s) in RCA: 401] [Impact Index Per Article: 100.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 09/14/2020] [Accepted: 10/20/2020] [Indexed: 12/18/2022]
Abstract
Growing evidence indicates the community of microorganisms throughout the gastrointestinal tract, (i.e., gut microbiota), is associated with anxiety and depressive disorders. We present the first systematic review of the gut microbiota in anxiety disorders, along with an update in depression. Consideration of shared underlying features is essential due to the high rates of comorbidity. Systematic searches, following PRISMA guidelines, identified 26 studies (two case-control comparisons of the gut microbiota in generalised anxiety disorder, 18 in depression, one incorporating both anxiety/depression, and five including symptom-only measures). Alpha and beta diversity findings were inconsistent; however, differences in bacterial taxa indicated disorders may be characterised by a higher abundance of proinflammatory species (e.g., Enterobacteriaceae and Desulfovibrio), and lower short-chain fatty acid producing-bacteria (e.g., Faecalibacterium). Several taxa, and their mechanisms of action, may relate to anxiety and depression pathophysiology via communication of peripheral inflammation to the brain. Although the gut microbiota remains a promising target for prevention and therapy, future research should assess confounders, particularly diet and psychotropic medications, and should examine microorganism function.
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Affiliation(s)
- Carra A Simpson
- Melbourne School of Psychological Sciences, The University of Melbourne, VIC, Australia; Melbourne Neuropsychiatry Centre, The University of Melbourne and Melbourne Health, VIC, Australia.
| | - Carmela Diaz-Arteche
- Melbourne Neuropsychiatry Centre, The University of Melbourne and Melbourne Health, VIC, Australia
| | - Djamila Eliby
- Melbourne School of Psychological Sciences, The University of Melbourne, VIC, Australia; Melbourne Neuropsychiatry Centre, The University of Melbourne and Melbourne Health, VIC, Australia
| | - Orli S Schwartz
- Orygen, Centre for Youth Mental Health, The University of Melbourne, VIC, Australia
| | - Julian G Simmons
- Melbourne School of Psychological Sciences, The University of Melbourne, VIC, Australia; Melbourne Neuropsychiatry Centre, The University of Melbourne and Melbourne Health, VIC, Australia
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31
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Chen J, Zhang S, Chen C, Jiang X, Qiu J, Qiu Y, Zhang Y, Wang T, Qin X, Zou Z, Chen C. Crosstalk of gut microbiota and serum/hippocampus metabolites in neurobehavioral impairments induced by zinc oxide nanoparticles. NANOSCALE 2020; 12:21429-21439. [PMID: 33079119 DOI: 10.1039/d0nr04563b] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The gut microbiome can be readily influenced by external factors, such as nanomaterials. However, the role of the microbiota-gut-brain axis in nanomaterials-induced neurotoxicity remains largely unknown. In this study, young mice aged 4 weeks were treated with either a vehicle solution or 26 mg kg-1 zinc oxide nanoparticles (ZnONPs) by intragastric administration for 30 days. The neurobehavioral alterations were assessed by the Morris water maze and open field test. Gut microbiota and the metabolites in both blood and hippocampus were detected using 16S rRNA sequencing and liquid chromatography-mass spectrometry metabolomics, respectively. The results demonstrated that oral exposure to ZnONPs resulted in neurobehavioral impairments in young mice, mainly manifested by spatial learning and memory deficits, and the inhibition of locomotor activity. Intriguingly, ZnONPs caused a marked disturbance of the gut microbial composition, but did not alter the α-diversity of the microbiota. The correlation analysis further revealed that neurobehavioral impairments induced by ZnONPs were closely associated with a perturbation in the gut microbiota composition that were specific to changes of neurobehavior-related genes (such as Bdnf and Dlg4), and correlated with serum and hippocampal metabolites. We also identified a unique metabolite [DG(15:0/0:0/22:4n6)] that linked relationships among the gut microbiota, metabolites and neurobehavior-related genes. Taken together, our results illustrated that oral exposure to ZnONPs not only altered the gut microbiome community, but also substantially disturbed the metabolic profiles leading to neurobehavioral impairments via the microbiota-gut-brain axis. These findings will provide a novel view for understanding the neurotoxicity of ZnONPs, and are helpful for identifying potential prevention and treatment strategies.
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Affiliation(s)
- Jianjun Chen
- Institute of Life Sciences, Chongqing Medical University, Chongqing, 400016, People's Republic of China.
| | - Shanshan Zhang
- Department of Occupational and Environmental Health, School of Public Health and Management, Chongqing Medical University, Chongqing, 400016, People's Republic of China.
| | - Chang Chen
- Institute of Life Sciences, Chongqing Medical University, Chongqing, 400016, People's Republic of China.
| | - Xuejun Jiang
- Center of Experimental Teaching for Public Health, Experimental Teaching and Management Center, Chongqing Medical University, Chongqing, 400016, People's Republic of China
| | - Jingfu Qiu
- Department of Health Laboratory Technology, School of Public Health and Management, Chongqing Medical University, Chongqing, 400016, People's Republic of China
| | - Yu Qiu
- Department of Neurology, The Affiliated University-Town Hospital of Chongqing Medical University, Chongqing, 401331, People's Republic of China
| | - Yujia Zhang
- Department of Occupational and Environmental Health, School of Public Health and Management, Chongqing Medical University, Chongqing, 400016, People's Republic of China.
| | - Tianxiong Wang
- Department of Occupational and Environmental Health, School of Public Health and Management, Chongqing Medical University, Chongqing, 400016, People's Republic of China.
| | - Xia Qin
- Department of Pharmacy, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, People's Republic of China
| | - Zhen Zou
- Institute of Life Sciences, Chongqing Medical University, Chongqing, 400016, People's Republic of China. and Dongsheng Lung-Brain Disease Joint Lab, Chongqing Medical University, Chongqing, 400016, People's Republic of China
| | - Chengzhi Chen
- Department of Occupational and Environmental Health, School of Public Health and Management, Chongqing Medical University, Chongqing, 400016, People's Republic of China. and Dongsheng Lung-Brain Disease Joint Lab, Chongqing Medical University, Chongqing, 400016, People's Republic of China
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Cordier JM, Aguggia JP, Danelon V, Mir FR, Rivarola MA, Mascó D. Postweaning Enriched Environment Enhances Cognitive Function and Brain-Derived Neurotrophic Factor Signaling in the Hippocampus in Maternally Separated Rats. Neuroscience 2020; 453:138-147. [PMID: 33039520 DOI: 10.1016/j.neuroscience.2020.09.058] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Revised: 09/24/2020] [Accepted: 09/28/2020] [Indexed: 12/14/2022]
Abstract
Adverse environments during early life may lead to different neurophysiological and behavioral consequences, including depression and learning and memory deficits that persist into adulthood. Previously, we demonstrated that exposure to an enriched environment during adolescence mitigates the cognitive impairment observed after maternal separation in a task-specific manner. However, underlying neural mechanisms are still not fully understood. The current study examines the effects of neonatal maternal separation (MS) and postweaning environmental enrichment (EE) on spatial learning and memory performance in a short version of the Barnes Maze, active and passive behaviors in the forced swim test, and on TrkB/BDNF receptor expression in the hippocampus. Our results revealed that MS impaired acquisition learning and that enriched rats performed better than non-enriched rats in acquisition trials, regardless of early conditions. During the probe, enriched-housed rats demonstrated better performance than those reared in standard conditions. No significant differences between groups were found in the forced swim test. Both MS and EE increase full-length TrkB expression, and the combination of MS and EE treatment caused the highest levels of this protein expression. Similarly, truncated TrkB expression was higher in the MS/EE group. Animal facility rearing (AFR) non-enriched groups present the lowest activation of phosphorylated Erk, a canonical downstream kinase of TrkB signaling. Taken together, our results demonstrate the importance of enriched environment as an intervention to ameliorate the effects of maternal separation on spatial learning and memory. TrkB/BDNF signaling could mediate neuroplastic changes related to learning and memory during exposure to enriched environment.
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Affiliation(s)
- Javier Maximiliano Cordier
- Instituto de Diversidad y Ecología Animal (IDEA), Consejo Nacional de Investigaciones Científicas y Tecnológicas, Universidad Nacional de Córdoba -Córdoba, Argentina
| | - Julieta Paola Aguggia
- Instituto de Investigaciones en Ciencias de la Salud (INICSA), Consejo Nacional de Investigaciones Científicas y Tecnológicas, Universidad Nacional de Córdoba, Enrique Barros esq. Enfermera Gordillo. Ciudad Universitaria, CP: 5016, Córdoba, Argentina
| | - Víctor Danelon
- Instituto de Investigaciones Biológicas y Tecnológicas (IIBYT), Consejo Nacional de Investigaciones Científicas y Tecnológicas, Universidad Nacional de Córdoba, Av. Vélez Sarsfield 1611, CP: 5016, Córdoba, Argentina
| | - Franco Rafael Mir
- Cátedra de Fisiología Animal, Departamento de Ciencias Exactas Físicas y Naturales, Universidad Nacional de La Rioja, Av. Luis M. de la Fuente S/N, Ciudad Universitaria de la Ciencia y de la Técnica, F5300 La Rioja, Argentina; Cátedra de Fisiología Animal, Facultad de Ciencias Exactas Físicas y Naturales, Universidad Nacional de Córdoba, Av. Vélez Sarsfield 299 X5000JJC- Córdoba, Argentina
| | - María Angélica Rivarola
- Instituto de Investigaciones en Ciencias de la Salud (INICSA), Consejo Nacional de Investigaciones Científicas y Tecnológicas, Universidad Nacional de Córdoba, Enrique Barros esq. Enfermera Gordillo. Ciudad Universitaria, CP: 5016, Córdoba, Argentina; Cátedra de Fisiología Animal, Facultad de Ciencias Exactas Físicas y Naturales, Universidad Nacional de Córdoba, Av. Vélez Sarsfield 299 X5000JJC- Córdoba, Argentina.
| | - Daniel Mascó
- Instituto de Investigaciones Biológicas y Tecnológicas (IIBYT), Consejo Nacional de Investigaciones Científicas y Tecnológicas, Universidad Nacional de Córdoba, Av. Vélez Sarsfield 1611, CP: 5016, Córdoba, Argentina
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33
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Xia Y, Zhu J, Xu Y, Zhang H, Zou F, Meng X. Effects of ecologically relevant concentrations of cadmium on locomotor activity and microbiota in zebrafish. CHEMOSPHERE 2020; 257:127220. [PMID: 32531487 DOI: 10.1016/j.chemosphere.2020.127220] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Revised: 05/24/2020] [Accepted: 05/25/2020] [Indexed: 06/11/2023]
Abstract
Cadmium (Cd) is widely spread in the aquatic environment, and its impact on humans and the ecosystem is an important issue in public health. However, its effects on zebrafish microbiota are still poorly understood. In this study, the potential developmental neurotoxicity and microbiota dysbiosis of ecologically relevant concentrations of Cd (0, 1.25, 2.5 and 5 μg/L) was evaluated by waterborne exposure for 7 days. The data showed that exposure to 5 μg/L of Cd significantly decreased survival rates and impaired locomotor activities. Uptake of Cd was enhanced with the increase of the concentration and duration of exposure. High-throughput sequencing analysis revealed a significant change in the richness and diversity of the microbiota of Cd-treated zebrafish. At the phylum level, the abundance of Proteobacteria increased, while that Firmicutes was significantly decreased after exposure to 5 μg/L Cd. At the genus level, there were significant changes in the abundances of several bacteria involved in the regulation of neurodegenerative diseases (Pseudomonas, Ruminococcaceae, Blautia, Bacteroides, Lactobacillus, Lachnospiraceae, and Phascolarctobacterium) in the Cd-treatment groups, as compared to the control group. In addition, the mRNA expression profiles of bdnf and genes involved in serotonin signaling and metabolism were changed in the Cd exposure groups. Together, these data suggest that Cd could be harmful to zebrafish health by inducing the microbiota changes, and the microbiota could serve as a potential target to protect against the adverse effects of Cd toxicity.
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Affiliation(s)
- Yuan Xia
- Department of Occupational Health and Occupational Medicine, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, Guangdong, China
| | - Jiawei Zhu
- Department of Occupational Health and Occupational Medicine, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, Guangdong, China
| | - Yongjie Xu
- Department of Occupational Health and Occupational Medicine, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, Guangdong, China
| | - Hongnan Zhang
- Department of Occupational Health and Occupational Medicine, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, Guangdong, China
| | - Fei Zou
- Department of Occupational Health and Occupational Medicine, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, Guangdong, China.
| | - Xiaojing Meng
- Department of Occupational Health and Occupational Medicine, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, Guangdong, China.
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34
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Cheng R, Xu T, Zhang Y, Wang F, Zhao L, Jiang Y, He F. Lactobacillus rhamnosus GG and Bifidobacterium bifidum TMC3115 Can Affect Development of Hippocampal Neurons Cultured In Vitro in a Strain-Dependent Manner. Probiotics Antimicrob Proteins 2020; 12:589-599. [PMID: 31286435 DOI: 10.1007/s12602-019-09571-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
This study examined whether Lactobacillus rhamnosus GG (LGG) and Bifidobacterium bifidum TMC3115 (TMC3115) could morphologically or physiologically influence hippocampal neuronal development in vitro. Hippocampal neurons cultured in vitro were exposed to live or heat-inactivated LGG or TMC3115 for either 6 or 24 h. Neuronal morphological changes and drebrin (DRB) and synaptophysin (SYP) protein levels were monitored using immunofluorescence. And the levels of DRB, SYP, and brain-derived neurotrophic factor (BDNF), and cAMP-response element binding protein (CREB) mRNA were detected using RT-PCR. The BDNF, CREB, and phosphorylated-CREB (P-CREB) protein levels were detected by extraction-enzyme-linked immunosorbent assay (ELISA) or Western blot assays. Heat-inactivated LGG and TMC3115 could enhance neuron viability, DRB and SYP protein levels, and BDNF mRNA level were significantly altered after exposure to the tested bacteria with 6 h or 24 h. There were no significant differences in neuronal morphology or DRB, SYP, or CREB mRNA levels among the groups following bacterial exposure. However, following exposure of live TMC3115 for 24 h, the neuronal BDNF and P-CREB protein levels were both significantly up-regulated as detected by western blot assays. These results demonstrated that LGG and TMC3115 could affect neuronal viability, along with hippocampal synaptic and functional development, in a strain-dependent manner, which may also be closely associated with the physiological and culture conditions of each strain. Up-regulated P-CREB may be one of the underlying mechanisms by which the bacteria, especially neurons following exposure of live TMC3115 for 24 h, are able to regulate neuronal BDNF protein production.
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Affiliation(s)
- Ruyue Cheng
- Department of Nutrition, Food Hygiene and Toxicology, West China School of Public Health and West China Fourth Hospital, and Healthy Food Evaluation Research Center, Sichuan University, No. 16, 3rd section, South Renmin Road, Wuhou District, Chengdu, 610041, Sichuan, People's Republic of China
- Department of Nutrition and Food Hygiene, Institute of Environmental and Operational Medicine, Tianjin, 300050, People's Republic of China
| | - Tong Xu
- Department of Nutrition and Food Hygiene, Institute of Environmental and Operational Medicine, Tianjin, 300050, People's Republic of China
| | - Yujie Zhang
- Department of Nutrition, Food Hygiene and Toxicology, West China School of Public Health and West China Fourth Hospital, and Healthy Food Evaluation Research Center, Sichuan University, No. 16, 3rd section, South Renmin Road, Wuhou District, Chengdu, 610041, Sichuan, People's Republic of China
- Department of Nutrition and Food Hygiene, Institute of Environmental and Operational Medicine, Tianjin, 300050, People's Republic of China
| | - Feng Wang
- Department of Nutrition and Food Hygiene, Institute of Environmental and Operational Medicine, Tianjin, 300050, People's Republic of China
| | - Linsen Zhao
- Hebei Inatural Biotech Co. Ltd., Shijiazhuang, 050000, Hebei, People's Republic of China
| | - Yugang Jiang
- Department of Nutrition and Food Hygiene, Institute of Environmental and Operational Medicine, Tianjin, 300050, People's Republic of China.
| | - Fang He
- Department of Nutrition, Food Hygiene and Toxicology, West China School of Public Health and West China Fourth Hospital, and Healthy Food Evaluation Research Center, Sichuan University, No. 16, 3rd section, South Renmin Road, Wuhou District, Chengdu, 610041, Sichuan, People's Republic of China.
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Czajeczny D, Kabzińska K, Wójciak RW. FROM GREAT GENETICS TO NEUROPSYCHOLOGY – OUTLINE OF THE RESEARCH ON THE ASSOCIATION BETWEEN MICROBIOTA AND HUMAN BEHAVIOUR. POSTĘPY MIKROBIOLOGII - ADVANCEMENTS OF MICROBIOLOGY 2020. [DOI: 10.21307/pm-2020.59.1.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Szeligowski T, Yun AL, Lennox BR, Burnet PWJ. The Gut Microbiome and Schizophrenia: The Current State of the Field and Clinical Applications. Front Psychiatry 2020; 11:156. [PMID: 32226399 PMCID: PMC7080964 DOI: 10.3389/fpsyt.2020.00156] [Citation(s) in RCA: 76] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Accepted: 02/18/2020] [Indexed: 12/14/2022] Open
Abstract
Schizophrenia is a debilitating psychiatric disorder, leading to both physical and social morbidity. Despite its importance, the etiology of schizophrenia remains poorly understood. Furthermore, its mainstream treatments fail to address all aspects of the disorder and are associated with significant side-effects. Recently, there has been growing interest in the relationship between the gut microbiome and mental health, including in schizophrenia. In this article, we review the existing evidence implicating dysbiosis in schizophrenia and discuss how the presumed dysbiosis could fit within known hypotheses of its pathogenesis, focusing on inflammation, tryptophan metabolites, and BDNF levels. We also evaluate the clinical potential of manipulating the gut microbiome with probiotics and prebiotics as adjunctive treatments in schizophrenia, based on existing clinical and pre-clinical studies. Overall, the current data showing microbiome alterations in schizophrenia are highly discrepant and insufficient to conclude whether microbiome changes are associated with increased risk of the disorder, or are simply the result of external factors or treatment. Despite some encouraging results of pro/prebiotic supplementation, there is also inconclusive evidence for their efficacy in schizophrenia. Thus, further research and more clinical trials are needed to test the validity of manipulating the gut microbiome to improve the treatment of this disorder.
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Affiliation(s)
| | - Alexandra Lim Yun
- Department of Psychiatry, University of Oxford, Oxford, United Kingdom
| | - Belinda R Lennox
- Department of Psychiatry, University of Oxford, Oxford, United Kingdom
| | - Philip W J Burnet
- Department of Psychiatry, University of Oxford, Oxford, United Kingdom
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Peterson CT. Dysfunction of the Microbiota-Gut-Brain Axis in Neurodegenerative Disease: The Promise of Therapeutic Modulation With Prebiotics, Medicinal Herbs, Probiotics, and Synbiotics. J Evid Based Integr Med 2020; 25:2515690X20957225. [PMID: 33092396 PMCID: PMC7586271 DOI: 10.1177/2515690x20957225] [Citation(s) in RCA: 54] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 07/12/2020] [Accepted: 08/15/2020] [Indexed: 12/19/2022] Open
Abstract
Recent data suggest gut microbiota dysbiosis as a contributing factor in neurodegenerative diseases, such as Parkinson's Disease (PD) and Alzheimer's Disease (AD), and these pathologies may manifest via the microbiota-gut-brain-axis, which comprises bidirectional communication through neuroimmune, neuroendocrine, and direct neural pathways such as the vagus nerve. Preclinical and human clinical trial data reveal exciting potential for novel treatment targets and therapeutic modulation with prebiotics, medicinal herbs, probiotics, and synbiotics in health, aging, and neurodegeneration and are reviewed here. While greater insights and characterization of the microbiota-gut-brain axis have been revealed over the past decade, salient questions related to the pathology, pathogenesis and clinical treatment of the axis in the context of both health and neurodegenerative disease remain and are discussed in this review. Future directions such as additional well-controlled, large scale, longitudinal human clinical trials are urgently needed to further elucidate both mechanism and therapeutic opportunity in health, neurological disease, and disease subpopulations to ensure that the next decade ushers the dawn of targeted therapeutic modulation of the microbiota-gut-brain axis.
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Affiliation(s)
- Christine Tara Peterson
- Department of Family Medicine and Public Health, Center of Excellence for Research and Training in Integrative Health, School of Medicine, University of California, San Diego, La Jolla, CA, USA
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38
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Cryan JF, O'Riordan KJ, Cowan CSM, Sandhu KV, Bastiaanssen TFS, Boehme M, Codagnone MG, Cussotto S, Fulling C, Golubeva AV, Guzzetta KE, Jaggar M, Long-Smith CM, Lyte JM, Martin JA, Molinero-Perez A, Moloney G, Morelli E, Morillas E, O'Connor R, Cruz-Pereira JS, Peterson VL, Rea K, Ritz NL, Sherwin E, Spichak S, Teichman EM, van de Wouw M, Ventura-Silva AP, Wallace-Fitzsimons SE, Hyland N, Clarke G, Dinan TG. The Microbiota-Gut-Brain Axis. Physiol Rev 2019; 99:1877-2013. [DOI: 10.1152/physrev.00018.2018] [Citation(s) in RCA: 1243] [Impact Index Per Article: 248.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
The importance of the gut-brain axis in maintaining homeostasis has long been appreciated. However, the past 15 yr have seen the emergence of the microbiota (the trillions of microorganisms within and on our bodies) as one of the key regulators of gut-brain function and has led to the appreciation of the importance of a distinct microbiota-gut-brain axis. This axis is gaining ever more traction in fields investigating the biological and physiological basis of psychiatric, neurodevelopmental, age-related, and neurodegenerative disorders. The microbiota and the brain communicate with each other via various routes including the immune system, tryptophan metabolism, the vagus nerve and the enteric nervous system, involving microbial metabolites such as short-chain fatty acids, branched chain amino acids, and peptidoglycans. Many factors can influence microbiota composition in early life, including infection, mode of birth delivery, use of antibiotic medications, the nature of nutritional provision, environmental stressors, and host genetics. At the other extreme of life, microbial diversity diminishes with aging. Stress, in particular, can significantly impact the microbiota-gut-brain axis at all stages of life. Much recent work has implicated the gut microbiota in many conditions including autism, anxiety, obesity, schizophrenia, Parkinson’s disease, and Alzheimer’s disease. Animal models have been paramount in linking the regulation of fundamental neural processes, such as neurogenesis and myelination, to microbiome activation of microglia. Moreover, translational human studies are ongoing and will greatly enhance the field. Future studies will focus on understanding the mechanisms underlying the microbiota-gut-brain axis and attempt to elucidate microbial-based intervention and therapeutic strategies for neuropsychiatric disorders.
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Affiliation(s)
- John F. Cryan
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Kenneth J. O'Riordan
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Caitlin S. M. Cowan
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Kiran V. Sandhu
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Thomaz F. S. Bastiaanssen
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Marcus Boehme
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Martin G. Codagnone
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Sofia Cussotto
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Christine Fulling
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Anna V. Golubeva
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Katherine E. Guzzetta
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Minal Jaggar
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Caitriona M. Long-Smith
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Joshua M. Lyte
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Jason A. Martin
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Alicia Molinero-Perez
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Gerard Moloney
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Emanuela Morelli
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Enrique Morillas
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Rory O'Connor
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Joana S. Cruz-Pereira
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Veronica L. Peterson
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Kieran Rea
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Nathaniel L. Ritz
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Eoin Sherwin
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Simon Spichak
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Emily M. Teichman
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Marcel van de Wouw
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Ana Paula Ventura-Silva
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Shauna E. Wallace-Fitzsimons
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Niall Hyland
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Gerard Clarke
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
| | - Timothy G. Dinan
- APC Microbiome Ireland, University College Cork, Cork, Ireland; Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland; Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland; and Department of Physiology, University College Cork, Cork, Ireland
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Yu ZC, Cen YX, Wu BH, Wei C, Xiong F, Li DF, Liu TT, Luo MH, Guo LL, Li YX, Wang LS, Wang JY, Yao J. Berberine prevents stress-induced gut inflammation and visceral hypersensitivity and reduces intestinal motility in rats. World J Gastroenterol 2019; 25:3956-3971. [PMID: 31413530 PMCID: PMC6689801 DOI: 10.3748/wjg.v25.i29.3956] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 06/26/2019] [Accepted: 07/05/2019] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Irritable bowel syndrome (IBS) is a common chronic non-organic disease of the digestive system. Berberine (BBR) has been used to treat patients with IBS, but the underlying therapeutic mechanism is little understood. We believe that BBR achieves its therapeutic effect on IBS by preventing stress intestinal inflammation and visceral hypersensitivity and reducing bowel motility.
AIM To test the hypothesis that BBR achieves its therapeutic effect on IBS by preventing subclinical inflammation of the intestinal mucosa and reducing visceral hypersensitivity and intestinal motility.
METHODS IBS was induced in rats via water avoidance stress (WAS). qRT-PCR and histological analyses were used to evaluate the levels of cytokines and mucosal inflammation, respectively. Modified ELISA and qRT-PCR were used to evaluate the nuclear factor kappa-B (NF-κB) signal transduction pathway. Colorectal distention test, gastrointestinal transit measurement, Western blot, and qRT-PCR were used to analyze visceral sensitivity, intestinal motility, the expression of C-kit (marker of Cajal mesenchymal cells), and the expression of brain derived neurotrophic factor (BDNF) and its receptor TrkB.
RESULTS WAS led to mucosal inflammation, visceral hyperalgesia, and high intestinal motility. Oral administration of BBR inhibited the NF-κB signal transduction pathway, reduced the expression of pro-inflammatory cytokines [interleukin (IL)-1β, IL-6, interferon-γ, and tumor necrosis factor-α], promoted the expression of anti-inflammatory cytokines (IL-10 and transforming growth factor-β), and improved the terminal ileum tissue inflammation. BBR inhibited the expression of BDNF, TrkB, and C-kit in IBS rats, leading to the reduction of intestinal motility and visceral hypersensitivity. The therapeutic effect of BBR at a high dose (100 mg/kg) was superior to than that of the low-dose (25 mg/kg) group.
CONCLUSION BBR reduces intestinal mucosal inflammation by inhibiting the intestinal NF-κB signal pathway in the IBS rats. BBR reduces the expression of BDNF, its receptor TrkB, and C-kit. BBR also reduces intestinal motility and visceral sensitivity to achieve its therapeutic effect on IBS.
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Affiliation(s)
- Zhi-Chao Yu
- Department of Gastroenterology, Jinan University of Second Clinical Medical Sciences, Shenzhen Municipal People’s Hospital, Shenzhen 518020, Guangdong Province, China
| | - Yong-Xin Cen
- Department of Gastroenterology, Foshan Gaoming Affiliated Hospital of Guangdong Medical University, Foshan 528500, Guangdong Province, China
| | - Ben-Hua Wu
- Department of Gastroenterology, Jinan University of Second Clinical Medical Sciences, Shenzhen Municipal People’s Hospital, Shenzhen 518020, Guangdong Province, China
| | - Cheng Wei
- Department of Gastroenterology, Jinan University of Second Clinical Medical Sciences, Shenzhen Municipal People’s Hospital, Shenzhen 518020, Guangdong Province, China
| | - Feng Xiong
- Department of Gastroenterology, Jinan University of Second Clinical Medical Sciences, Shenzhen Municipal People’s Hospital, Shenzhen 518020, Guangdong Province, China
| | - De-Feng Li
- Department of Gastroenterology, Jinan University of Second Clinical Medical Sciences, Shenzhen Municipal People’s Hospital, Shenzhen 518020, Guangdong Province, China
| | - Ting-Ting Liu
- Department of Gastroenterology, Jinan University of Second Clinical Medical Sciences, Shenzhen Municipal People’s Hospital, Shenzhen 518020, Guangdong Province, China
| | - Ming-Han Luo
- Department of Gastroenterology, Jinan University of Second Clinical Medical Sciences, Shenzhen Municipal People’s Hospital, Shenzhen 518020, Guangdong Province, China
| | - Li-Liangzi Guo
- Department of Gastroenterology, Jinan University of Second Clinical Medical Sciences, Shenzhen Municipal People’s Hospital, Shenzhen 518020, Guangdong Province, China
| | - Ying-Xue Li
- Department of Gastroenterology, Jinan University of Second Clinical Medical Sciences, Shenzhen Municipal People’s Hospital, Shenzhen 518020, Guangdong Province, China
| | - Li-Sheng Wang
- Department of Gastroenterology, Jinan University of Second Clinical Medical Sciences, Shenzhen Municipal People’s Hospital, Shenzhen 518020, Guangdong Province, China
| | - Jian-Yao Wang
- Department of General Surgery, Shenzhen Children’s Hospital, Shenzhen 518026, Guangdong Province, China
| | - Jun Yao
- Department of Gastroenterology, Jinan University of Second Clinical Medical Sciences, Shenzhen Municipal People’s Hospital, Shenzhen 518020, Guangdong Province, China
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40
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Salvucci E. The human-microbiome superorganism and its modulation to restore health. Int J Food Sci Nutr 2019; 70:781-795. [DOI: 10.1080/09637486.2019.1580682] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- E. Salvucci
- Instituto de Ciencia y Tecnología de Alimentos Córdoba (ICYTAC-CONICET-UNC), Córdoba, Argentina
- Facultad de Ciencias Exactas, Físicas y Naturales; Facultad de Ciencias Agropecuarias, Universidad Nacional de Córdoba, Córdoba
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41
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Xu Z, Wang C, Dong X, Hu T, Wang L, Zhao W, Zhu S, Li G, Hu Y, Gao Q, Wan J, Liu Z, Sun J. Chronic alcohol exposure induced gut microbiota dysbiosis and its correlations with neuropsychic behaviors and brain BDNF/Gabra1 changes in mice. Biofactors 2019; 45:187-199. [PMID: 30417952 DOI: 10.1002/biof.1469] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Accepted: 09/26/2018] [Indexed: 12/14/2022]
Abstract
Alcohol addiction can cause brain dysfunction and many other diseases. Recently, increasing evidences have suggested that gut microbiota plays a vital role in regulating alcohol addiction. However, the exact mechanism has not yet been elucidated. Here, our study focused on the intestinal bacteria alternations and their correlations with alcohol-induced neuropsychic behaviors. When consuming alcohol over 3-week period, animals gradually displayed anxiety/depression-like behaviors. Moreover, 16S rRNA sequencing showed significant intestinal microflora dysbiosis and distinct community composition. Actinobacteria and Cyanobacteria were both increased at the phylum level. At the genus level, Adlercreutzia spp., Allobaculum spp., and Turicibacter spp. were increased whereas Helicobacter spp. was decreased. We also found that the distances in inner zone measured by open field test and 4% (v/v) alcohol preference percentages were significantly correlated with Adlercreutzia spp. The possible mechanisms were explored and we found the expression of brain-derived neurotrophic factor (BDNF) and α1 subunit of γ-aminobutyric acid A receptor (Gabra1) were both decreased in prefrontal cortex (PFC). Especially, further correlation analyses demonstrated that decreased Adlercreutzia spp. was positively correlated with alcohol preference and negatively correlated with anxiety-like behavior and BDNF/Gabra1 changes in PFC. Similar relationships were observed between Allobaculum spp. and alcohol preference and BDNF changes. Helicobacter spp. and Turicibacter spp. were also correlated with PFC BDNF and hippocampus Gabra1 level. Taken together, our study showed that gut microbiota dysbiosis during chronic alcohol exposure was closely correlated with alcohol-induced neuropsychic behaviors and BDNF/Gabra1 expression, which provides a new perspective for understanding underlying mechanisms in alcohol addiction. © 2018 BioFactors, 45(2):187-199, 2019.
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Affiliation(s)
- Zheng Xu
- Department of Anatomy, Shandong University School of Basic medicine, Jinan, Shandong, China
| | - Can Wang
- School of Medicine, Lanzhou University, Lanzhou, Gansu, China
| | - Xiaoguang Dong
- Department of Orthopedic, Osteological Hospital of Yishengjian, Qingdao, Shandong, China
| | - Tao Hu
- Department of Orthopedic, Osteological Hospital of Yishengjian, Qingdao, Shandong, China
| | - Lingling Wang
- Department of Hematology, School of Nursing Shandong University, Jinan, Shandong, China
| | - Wenbo Zhao
- Department of Anatomy, Shandong University School of Basic medicine, Jinan, Shandong, China
| | - Shaowei Zhu
- Department of Anatomy, Shandong University School of Basic medicine, Jinan, Shandong, China
| | - Guibao Li
- Department of Anatomy, Shandong University School of Basic medicine, Jinan, Shandong, China
| | - Yanlai Hu
- Department of Anatomy, Shandong University School of Basic medicine, Jinan, Shandong, China
| | - Qing Gao
- Department of Anatomy, Shandong University School of Basic medicine, Jinan, Shandong, China
| | - Jiale Wan
- Department of Anatomy, Shandong University School of Basic medicine, Jinan, Shandong, China
| | - Zengxun Liu
- Department of Anatomy, Shandong University School of Basic medicine, Jinan, Shandong, China
| | - Jinhao Sun
- Department of Anatomy, Shandong University School of Basic medicine, Jinan, Shandong, China
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Westfall S, Iqbal U, Sebastian M, Pasinetti GM. Gut microbiota mediated allostasis prevents stress-induced neuroinflammatory risk factors of Alzheimer's disease. PROGRESS IN MOLECULAR BIOLOGY AND TRANSLATIONAL SCIENCE 2019; 168:147-181. [DOI: 10.1016/bs.pmbts.2019.06.013] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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43
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Lombardi VC, De Meirleir KL, Subramanian K, Nourani SM, Dagda RK, Delaney SL, Palotás A. Nutritional modulation of the intestinal microbiota; future opportunities for the prevention and treatment of neuroimmune and neuroinflammatory disease. J Nutr Biochem 2018; 61:1-16. [PMID: 29886183 PMCID: PMC6195483 DOI: 10.1016/j.jnutbio.2018.04.004] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2018] [Revised: 04/11/2018] [Accepted: 04/13/2018] [Indexed: 01/09/2023]
Abstract
The gut-brain axis refers to the bidirectional communication between the enteric nervous system and the central nervous system. Mounting evidence supports the premise that the intestinal microbiota plays a pivotal role in its function and has led to the more common and perhaps more accurate term gut-microbiota-brain axis. Numerous studies have identified associations between an altered microbiome and neuroimmune and neuroinflammatory diseases. In most cases, it is unknown if these associations are cause or effect; notwithstanding, maintaining or restoring homeostasis of the microbiota may represent future opportunities when treating or preventing these diseases. In recent years, several studies have identified the diet as a primary contributing factor in shaping the composition of the gut microbiota and, in turn, the mucosal and systemic immune systems. In this review, we will discuss the potential opportunities and challenges with respect to modifying and shaping the microbiota through diet and nutrition in order to treat or prevent neuroimmune and neuroinflammatory disease.
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Affiliation(s)
- Vincent C Lombardi
- Nevada Center for Biomedical Research, University of Nevada, Reno, 1664 N. Virginia St. MS 0552, Reno, NV, 89557, USA; University of Nevada, Reno, School of Medicine, Department of Pathology, 1664 N. Virginia St. MS 0357, Reno, NV, 89557, USA.
| | - Kenny L De Meirleir
- Nevada Center for Biomedical Research, University of Nevada, Reno, 1664 N. Virginia St. MS 0552, Reno, NV, 89557, USA.
| | - Krishnamurthy Subramanian
- Nevada Center for Biomedical Research, University of Nevada, Reno, 1664 N. Virginia St. MS 0552, Reno, NV, 89557, USA.
| | - Sam M Nourani
- University of Nevada, Reno, School of Medicine, Department of Internal Medicine, 1664 N. Virginia St. MS 0357, Reno, NV, 89557, USA; Advanced Therapeutic, General Gastroenterology & Hepatology Digestive Health Associates, Reno, NV, USA.
| | - Ruben K Dagda
- University of Nevada, Reno, School of Medicine, Department of Pharmacology, 1664 N. Virginia St. MS 0318, Reno, NV, 89557, USA.
| | | | - András Palotás
- Kazan Federal University, Institute of Fundamental Medicine and Biology, (Volga Region) 18 Kremlyovskaya St., Kazan, 420008, Republic of Tatarstan, Russian Federation; Asklepios-Med (private medical practice and research center), Kossuth Lajos sgt. 23, Szeged, H-6722, Hungary.
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The vagus nerve modulates BDNF expression and neurogenesis in the hippocampus. Eur Neuropsychopharmacol 2018; 28:307-316. [PMID: 29426666 DOI: 10.1016/j.euroneuro.2017.12.004] [Citation(s) in RCA: 81] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Revised: 10/26/2017] [Accepted: 12/02/2017] [Indexed: 12/26/2022]
Abstract
Accumulating evidence suggests that certain gut microbiota have antidepressant-like behavioural effects and that the microbiota can regulate neurogenesis and the expression of brain-derived neurotrophic factor (BDNF) in the hippocampus. The precise mechanisms underlying these effects are not yet clear. However, the vagus nerve is one of the primary bidirectional routes of communication between the gut and the brain and thus may represent a candidate mechanism. Yet, relatively little is known about the direct influence of vagus nerve activity on hippocampal function and plasticity. Thus, the aim of the present study was to determine whether constitutive vagus nerve activity contributes to the regulation of neurogenesis and BDNF mRNA expression in the hippocampus. To this end, we examined the impact of subdiaphragmatic vagotomy in adult mice on these parameters. We found that vagotomy decreased BDNF mRNA in all areas of the hippocampus. Vagotomy also reduced the proliferation and survival of newly born cells and decreased the number of immature neurons, particularly those with a more complex dendritic morphology. Taken together, these findings suggest that vagal nerve activity influences neurogenesis and BDNF mRNA expression in the adult hippocampus.
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Moschopoulos C, Kratimenos P, Koutroulis I, Shah BV, Mowes A, Bhandari V. The Neurodevelopmental Perspective of Surgical Necrotizing Enterocolitis: The Role of the Gut-Brain Axis. Mediators Inflamm 2018; 2018:7456857. [PMID: 29686534 PMCID: PMC5866871 DOI: 10.1155/2018/7456857] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2017] [Revised: 01/22/2018] [Accepted: 02/05/2018] [Indexed: 02/07/2023] Open
Abstract
This state-of-the-art review article aims to highlight the most recent evidence about the therapeutic options of surgical necrotizing enterocolitis, focusing on the molecular basis of the gut-brain axis in relevance to the neurodevelopmental outcomes of primary peritoneal drainage and primary laparotomy. Current evidence favors primary laparotomy over primary peritoneal drainage as regards neurodevelopment in the surgical treatment of necrotizing enterocolitis. The added exposure to inhalational anesthesia in infants undergoing primary laparotomy is an additional confounding variable but requires further study. The concept of the gut-brain axis suggests that bowel injury initiates systemic inflammation potentially affecting the developing central nervous system. Signals about microbes in the gut are transduced to the brain and the limbic system via the enteric nervous system, autonomic nervous system, and hypothalamic-pituitary axis. Preterm infants with necrotizing enterocolitis have significant differences in the diversity of the microbiome compared with preterm controls. The gut bacterial flora changes remarkably prior to the onset of necrotizing enterocolitis with a predominance of pathogenic organisms. The type of initial surgical approach correlates with the length of functional gut and microbiome equilibrium influencing brain development and function through the gut-brain axis. Existing data favor patients who were treated with primary laparotomy over those who underwent primary peritoneal drainage in terms of neurodevelopmental outcomes. We propose that this is due to the sustained injurious effect of the remaining diseased and necrotic bowel on the developing newborn brain, in patients treated with primary peritoneal drainage, through the gut-brain axis and probably not due to the procedure itself.
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Affiliation(s)
- Chariton Moschopoulos
- 1Department of Pediatrics, Flushing Hospital Medical Center, SUNY-Stonybrook School of Medicine, Flushing, NY, USA
| | - Panagiotis Kratimenos
- 2Division of Neonatology and Center for Research in Neuroscience, Children's National Medical Center, George Washington University School of Medicine, Washington, DC, USA
| | - Ioannis Koutroulis
- 3Department of Emergency Medicine, Children's National Medical Center, George Washington University School of Medicine, Washington, DC, USA
| | - Bhairav V. Shah
- 4Division of Pediatric Surgery, Palmetto Health Children's Hospital, University of South Carolina School of Medicine, Columbia, SC, USA
| | - Anja Mowes
- 5St. Christopher's Hospital for Children, Drexel University College of Medicine, Philadelphia, PA, USA
| | - Vineet Bhandari
- 5St. Christopher's Hospital for Children, Drexel University College of Medicine, Philadelphia, PA, USA
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Filosa S, Di Meo F, Crispi S. Polyphenols-gut microbiota interplay and brain neuromodulation. Neural Regen Res 2018; 13:2055-2059. [PMID: 30323120 PMCID: PMC6199944 DOI: 10.4103/1673-5374.241429] [Citation(s) in RCA: 123] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Increasing evidence suggests that food ingested polyphenols can have beneficial effects in neuronal protection acting against oxidative stress and inflammatory injury. Moreover, polyphenols have been reported to promote cognitive functions. Biotransformation of polyphenols is needed to obtain metabolites active in brain and it occurs through their processing by gut microbiota. Polyphenols metabolites could directly act as neurotransmitters crossing the blood-brain barrier or indirectly by modulating the cerebrovascular system. The microbiota-gut-brain axis is considered a neuroendocrine system that acts bidirectionally and plays an important role in stress responses. The metabolites produced by microbiota metabolism can modulate gut bacterial composition and brain biochemistry acting as neurotransmitters in the central nervous system. Gut microbiota composition can be influenced by dietary ingestion of natural bioactive molecules such as probiotics, prebiotics and polyphenol. Microbiota composition can be altered by dietary changes and gastrointestinal dysfunctions are observed in neurodegenerative diseases. In addition, several pieces of evidence support the idea that alterations in gut microbiota and enteric neuroimmune system could contribute to onset and progression of these age-related disorders. The impact of polyphenols on microbiota composition strengthens the idea that maintaining a healthy microbiome by modulating diet is essential for having a healthy brain across the lifespan. Moreover, it is emerging that they could be used as novel therapeutics to prevent brain from neurodegeneration.
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Affiliation(s)
- Stefania Filosa
- Institute of Biosciences and Bioresources, National Research Council, via P. Castellino, Naples; Istituto di Ricovero e Cura a Carattere Scientifico Neuromed, Pozzilli, Italy
| | - Francesco Di Meo
- Institute of Biosciences and Bioresources, National Research Council, via P. Castellino, Naples, Italy
| | - Stefania Crispi
- Institute of Biosciences and Bioresources, National Research Council, via P. Castellino, Naples, Italy
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RETRACTED CHAPTER: Changing Paradigm of Probiotics from Functional Foods to Biotherapeutic Agents. Microb Biotechnol 2018. [DOI: 10.1007/978-981-10-7140-9_3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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Westfall S, Lomis N, Kahouli I, Dia SY, Singh SP, Prakash S. Microbiome, probiotics and neurodegenerative diseases: deciphering the gut brain axis. Cell Mol Life Sci 2017; 74:3769-3787. [PMID: 28643167 PMCID: PMC11107790 DOI: 10.1007/s00018-017-2550-9] [Citation(s) in RCA: 310] [Impact Index Per Article: 44.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Revised: 05/05/2017] [Accepted: 05/29/2017] [Indexed: 02/07/2023]
Abstract
The gut microbiota is essential to health and has recently become a target for live bacterial cell biotherapies for various chronic diseases including metabolic syndrome, diabetes, obesity and neurodegenerative disease. Probiotic biotherapies are known to create a healthy gut environment by balancing bacterial populations and promoting their favorable metabolic action. The microbiota and its respective metabolites communicate to the host through a series of biochemical and functional links thereby affecting host homeostasis and health. In particular, the gastrointestinal tract communicates with the central nervous system through the gut-brain axis to support neuronal development and maintenance while gut dysbiosis manifests in neurological disease. There are three basic mechanisms that mediate the communication between the gut and the brain: direct neuronal communication, endocrine signaling mediators and the immune system. Together, these systems create a highly integrated molecular communication network that link systemic imbalances with the development of neurodegeneration including insulin regulation, fat metabolism, oxidative markers and immune signaling. Age is a common factor in the development of neurodegenerative disease and probiotics prevent many harmful effects of aging such as decreased neurotransmitter levels, chronic inflammation, oxidative stress and apoptosis-all factors that are proven aggravators of neurodegenerative disease. Indeed patients with Parkinson's and Alzheimer's diseases have a high rate of gastrointestinal comorbidities and it has be proposed by some the management of the gut microbiota may prevent or alleviate the symptoms of these chronic diseases.
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Affiliation(s)
- Susan Westfall
- Biomedical Technology and Cell Therapy Research Laboratory, Department of Biomedical Engineering, Faculty of Medicine, McGill University, 3775 University Street, Montreal, QC, H3A2B4, Canada
| | - Nikita Lomis
- Biomedical Technology and Cell Therapy Research Laboratory, Department of Biomedical Engineering, Faculty of Medicine, McGill University, 3775 University Street, Montreal, QC, H3A2B4, Canada
- Department of Experimental Medicine, Faculty of Medicine, McGill University, 3775 University Street, Montreal, QC, H3A2B4, Canada
| | - Imen Kahouli
- Biomedical Technology and Cell Therapy Research Laboratory, Department of Biomedical Engineering, Faculty of Medicine, McGill University, 3775 University Street, Montreal, QC, H3A2B4, Canada
- Department of Experimental Medicine, Faculty of Medicine, McGill University, 3775 University Street, Montreal, QC, H3A2B4, Canada
| | - Si Yuan Dia
- Biomedical Technology and Cell Therapy Research Laboratory, Department of Biomedical Engineering, Faculty of Medicine, McGill University, 3775 University Street, Montreal, QC, H3A2B4, Canada
| | - Surya Pratap Singh
- Department of Biochemistry, Banaras Hindu University, Varanasi, 221005, Uttar Pradesh, India
| | - Satya Prakash
- Biomedical Technology and Cell Therapy Research Laboratory, Department of Biomedical Engineering, Faculty of Medicine, McGill University, 3775 University Street, Montreal, QC, H3A2B4, Canada.
- Department of Experimental Medicine, Faculty of Medicine, McGill University, 3775 University Street, Montreal, QC, H3A2B4, Canada.
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Allen-Blevins CR, You X, Hinde K, Sela DA. Handling stress may confound murine gut microbiota studies. PeerJ 2017; 5:e2876. [PMID: 28097073 PMCID: PMC5234434 DOI: 10.7717/peerj.2876] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Accepted: 12/07/2016] [Indexed: 01/04/2023] Open
Abstract
BACKGROUND Accumulating evidence indicates interactions between human milk composition, particularly sugars (human milk oligosaccharides or HMO), the gut microbiota of human infants, and behavioral effects. Some HMO secreted in human milk are unable to be endogenously digested by the human infant but are able to be metabolized by certain species of gut microbiota, including Bifidobacterium longum subsp. infantis (B. infantis), a species sensitive to host stress (Bailey & Coe, 2004). Exposure to gut bacteria like B. infantisduring critical neurodevelopment windows in early life appears to have behavioral consequences; however, environmental, physical, and social stress during this period can also have behavioral and microbial consequences. While rodent models are a useful method for determining causal relationships between HMO, gut microbiota, and behavior, murine studies of gut microbiota usually employ oral gavage, a technique stressful to the mouse. Our aim was to develop a less-invasive technique for HMO administration to remove the potential confound of gavage stress. Under the hypothesis that stress affects gut microbiota, particularly B. infantis, we predicted the pups receiving a prebiotic solution in a less-invasive manner would have the highest amount of Bifidobacteria in their gut. METHODS This study was designed to test two methods, active and passive, of solution administration to mice and the effects on their gut microbiome. Neonatal C57BL/6J mice housed in a specific-pathogen free facility received increasing doses of fructooligosaccharide (FOS) solution or deionized, distilled water. Gastrointestinal (GI) tracts were collected from five dams, six sires, and 41 pups over four time points. Seven fecal pellets from unhandled pups and two pellets from unhandled dams were also collected. Qualitative real-time polymerase chain reaction (qRT-PCR) was used to quantify and compare the amount of Bifidobacterium, Bacteroides, Bacteroidetes, and Firmicutes. RESULTS Our results demonstrate a significant difference between the amount of Firmicutes in pups receiving water passively and those receiving FOS actively (p-value = 0.009). Additionally, we found significant differences between the fecal microbiota from handled and non-handled mouse pups. DISCUSSION From our results, we conclude even handling pups for experimental purposes, without gavage, may induce enough stress to alter the murine gut microbiota profile. We suggest further studies to examine potential stress effects on gut microbiota caused by experimental techniques. Stress from experimental techniques may need to be accounted for in future gut microbiota studies.
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Affiliation(s)
- Cary R. Allen-Blevins
- Department of Human Evolutionary Biology, Harvard University, Cambridge, MA, United States
| | - Xiaomeng You
- Department of Food Science, University of Massachusetts, Amherst, MA, United States
| | - Katie Hinde
- Center for Evolution and Medicine, Arizona State University, Tempe, AZ, United States
- School of Human Evolution and Social Change, Arizona State University, Tempe, AZ, United States
| | - David A. Sela
- Department of Food Science, University of Massachusetts, Amherst, MA, United States
- Department of Microbiology, University of Massachusetts, Amherst, MA, United States
- Center for Microbiome Research, University of Massachusetts Medical School, Worcester, MA, United States
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Bifidobacterium longum 1714 as a translational psychobiotic: modulation of stress, electrophysiology and neurocognition in healthy volunteers. Transl Psychiatry 2016; 6:e939. [PMID: 27801892 PMCID: PMC5314114 DOI: 10.1038/tp.2016.191] [Citation(s) in RCA: 301] [Impact Index Per Article: 37.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Revised: 07/04/2016] [Accepted: 08/03/2016] [Indexed: 01/01/2023] Open
Abstract
The emerging concept of psychobiotics-live microorganisms with a potential mental health benefit-represents a novel approach for the management of stress-related conditions. The majority of studies have focused on animal models. Recent preclinical studies have identified the B. longum 1714 strain as a putative psychobiotic with an impact on stress-related behaviors, physiology and cognitive performance. Whether such preclinical effects could be translated to healthy human volunteers remains unknown. We tested whether psychobiotic consumption could affect the stress response, cognition and brain activity patterns. In a within-participants design, healthy volunteers (N=22) completed cognitive assessments, resting electroencephalography and were exposed to a socially evaluated cold pressor test at baseline, post-placebo and post-psychobiotic. Increases in cortisol output and subjective anxiety in response to the socially evaluated cold pressor test were attenuated. Furthermore, daily reported stress was reduced by psychobiotic consumption. We also observed subtle improvements in hippocampus-dependent visuospatial memory performance, as well as enhanced frontal midline electroencephalographic mobility following psychobiotic consumption. These subtle but clear benefits are in line with the predicted impact from preclinical screening platforms. Our results indicate that consumption of B. longum 1714 is associated with reduced stress and improved memory. Further studies are warranted to evaluate the benefits of this putative psychobiotic in relevant stress-related conditions and to unravel the mechanisms underlying such effects.
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