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Li C, Ma Y, Chai X, Feng X, Feng W, Zhao Y, Cui C, Wang J, Zhao S, Zhu X. Ketogenic diet attenuates cognitive dysfunctions induced by hypoglycemia via inhibiting endoplasmic reticulum stress-dependent pathways. Food Funct 2024; 15:1294-1309. [PMID: 38197246 DOI: 10.1039/d3fo04007k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2024]
Abstract
Hypoglycemia can potentially cause severe damage to the central nervous system. The ketogenic diet (KD), characterized by high-fat and extremely low-carbohydrate content, can modulate homeostasis and nutrient metabolism, thereby influencing body health. However, the effects and underlying mechanisms of KD on hypoglycemia-induced brain injury have not been thoroughly investigated. We aimed to explore the modulating effects of KD on cognitive functions and elucidate the underlying mechanisms. In this study, one-month-old mice were fed with KD for 2 weeks, and the changes in the gut microbiota were detected using the 16S rRNA gene amplicon sequencing method. The hypoglycemic model of mice was established using insulin, and the potential protective effect of KD on hypoglycemia-induced brain injury in mice was evaluated through immunofluorescence staining, western blotting, transmission electron microscopy, and Golgi staining. Our results showed that the intestinal flora of Dorea increased and Rikenella decreased in KD-fed mice. KD can not only alleviate anxiety-like behavior induced by hypoglycemia, but also increase the proportion of mushroom dendritic spines in the hippocampus by modulating changes in the gut microbiota. KD regulated synaptic plasticity by increasing the levels of SPN, PSD95, and SYP, which relieve cognitive impairment caused by hypoglycemia. Moreover, KD can promote the proliferation and survival of adult neural stem cells in the hippocampus, while reducing apoptosis by suppressing the activation of the IRE1-XBP1 and ATF6 endoplasmic reticulum stress pathways in mice with hypoglycemia. This study provides new evidence for demonstrating that KD may alleviate cognitive dysfunctions caused by hypoglycemia by modulating the gut microbiota.
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Affiliation(s)
- Cixia Li
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi 712100, PR China.
- College of Life Science and Technology, Xinxiang Medical University, Xinxiang, Henan 453003, PR China
- Henan Key Laboratory of Medical Tissue Regeneration, Xinxiang Medical University, Xinxiang, Henan 453003, PR China
| | - Yue Ma
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi 712100, PR China.
| | - Xuejun Chai
- College of Basic Medicine, Xi'An Medical University, Xi'An, Shaanxi 710021, PR China
| | - Xiao Feng
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi 712100, PR China.
| | - Wenyu Feng
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi 712100, PR China.
| | - Yongkang Zhao
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi 712100, PR China.
| | - Chaochu Cui
- Henan Key Laboratory of Medical Tissue Regeneration, Xinxiang Medical University, Xinxiang, Henan 453003, PR China
| | - Jianguo Wang
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi 712100, PR China.
| | - Shanting Zhao
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi 712100, PR China.
| | - Xiaoyan Zhu
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi 712100, PR China.
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2
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Shimokawa I. Mechanisms underlying retardation of aging by dietary energy restriction. Pathol Int 2023; 73:579-592. [PMID: 37975408 DOI: 10.1111/pin.13387] [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: 10/10/2023] [Accepted: 10/19/2023] [Indexed: 11/19/2023]
Abstract
Moderate restriction of dietary energy intake, referred to here as dietary restriction (DR), delays aging and extends lifespan in experimental animals compared with a diet of ad libitum feeding (AL) control animals. Basic knowledge of the mechanisms underlying the effects of DR could be applicable to extending the healthspan in humans. This review highlights the importance of forkhead box O (FoxO) transcription factors downstream of the growth hormone-insulin-like growth factor 1 signaling in the effects of DR. Our lifespan studies in mice with heterozygous Foxo1 or Foxo3 gene knockout indicated differential roles of FoxO1 and FoxO3 in the tumor-inhibiting and life-extending effects of DR. Subsequent studies suggested a critical role of FoxO3 in metabolic and mitochondrial bioenergetic adaptation to DR. Our studies also verified hypothalamic neuropeptide Y (Npy) as a vital neuropeptide showing pleiotropic and sexually dimorphic effects for extending the healthspan in the context of nutritional availability. Npy was necessary for DR to exert its effects in male and female mice; meanwhile, under AL conditions, the loss of Npy prevented obesity and insulin resistance only in female mice. Overnutrition disrupts FoxO- and Npy-associated metabolic and mitochondrial bioenergetic adaptive processes, causing the acceleration of aging and related diseases.
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Affiliation(s)
- Isao Shimokawa
- Department of Pathology I, Nagasaki University School of Medicine and Graduate School of Biomedical Sciences, Nagasaki, Japan
- SAGL, LLC, Fukuoka, Japan
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3
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Mitra S, Munni YA, Dash R, Sadhu T, Barua L, Islam MA, Chowdhury D, Bhattacharjee D, Mazumder K, Moon IS. Gut Microbiota in Autophagy Regulation: New Therapeutic Perspective in Neurodegeneration. Life (Basel) 2023; 13:life13040957. [PMID: 37109487 PMCID: PMC10144697 DOI: 10.3390/life13040957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 03/18/2023] [Accepted: 03/31/2023] [Indexed: 04/09/2023] Open
Abstract
Gut microbiota and the brain are related via a complex bidirectional interconnective network. Thus, intestinal homeostasis is a crucial factor for the brain, as it can control the environment of the central nervous system and play a significant role in disease progression. The link between neuropsychological behavior or neurodegeneration and gut dysbiosis is well established, but many involved pathways remain unknown. Accumulating studies showed that metabolites derived from gut microbiota are involved in the autophagy activation of various organs, including the brain, one of the major pathways of the protein clearance system that is essential for protein aggregate clearance. On the other hand, some metabolites are evidenced to disrupt the autophagy process, which can be a modulator of neurodegeneration. However, the detailed mechanism of autophagy regulation by gut microbiota remains elusive, and little research only focused on that. Here we tried to evaluate the crosstalk between gut microbiota metabolites and impaired autophagy of the central nervous system in neurodegeneration and the key to future research regarding gut dysbiosis and compromised autophagy in neurodegenerative diseases.
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Affiliation(s)
- Sarmistha Mitra
- Department of Anatomy, College of Medicine, Dongguk University, Gyeongju 38066, Republic of Korea
| | - Yeasmin Akter Munni
- Department of Anatomy, College of Medicine, Dongguk University, Gyeongju 38066, Republic of Korea
| | - Raju Dash
- Department of New Biology, Daegu Gyeongbuk Institute of Science and Technology, Daegu 42988, Republic of Korea
| | - Toma Sadhu
- Department of Bioinformatics and Biotechnology, Asian University for Women, Chittagong 4000, Bangladesh
| | - Largess Barua
- Department of Anatomy and Neurobiology, School of Dentistry, Kyungpook National University, Daegu 41940, Republic of Korea
| | - Md. Ariful Islam
- Department of Pharmaceutical Sciences, North South University, Dhaka 1229, Bangladesh
| | - Dipannita Chowdhury
- Department of Pharmacy, BGC Trust University Bangladesh, Chittagong 4381, Bangladesh
| | - Debpriya Bhattacharjee
- Faculty of Environment and Natural Sciences, Brandenburg Technical University Cottbus Senftenberg, D-03013 Cottbus, Germany
| | - Kishor Mazumder
- Department of Pharmacy, Jashore University of Science and Technology, Jashore 7408, Bangladesh
- School of Optometry and Vision Science, UNSW Medicine, University of New South Wales (UNSW), Sydney, NSW 2052, Australia
| | - Il Soo Moon
- Department of Anatomy, College of Medicine, Dongguk University, Gyeongju 38066, Republic of Korea
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4
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Bhatia-Dey N, Csoka AB, Heinbockel T. Chemosensory Ability and Sensitivity in Health and Disease: Epigenetic Regulation and COVID-19. Int J Mol Sci 2023; 24:ijms24044179. [PMID: 36835589 PMCID: PMC9959623 DOI: 10.3390/ijms24044179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 02/13/2023] [Accepted: 02/17/2023] [Indexed: 02/22/2023] Open
Abstract
Throughout the animal kingdom, our two chemical senses, olfaction and gustation, are defined by two primary factors: genomic architecture of the organisms and their living environment. During the past three years of the global COVID-19 pandemic, these two sensory modalities have drawn much attention at the basic science and clinical levels because of the strong association of olfactory and gustatory dysfunction with viral infection. Loss of our sense of smell alone, or together with a loss of taste, has emerged as a reliable indicator of COVID-19 infection. Previously, similar dysfunctions have been detected in a large cohort of patients with chronic conditions. The research focus remains on understanding the persistence of olfactory and gustatory disturbances in the post-infection phase, especially in cases with long-term effect of infection (long COVID). Also, both sensory modalities show consistent age-related decline in studies aimed to understand the pathology of neurodegenerative conditions. Some studies using classical model organisms show an impact on neural structure and behavior in offspring as an outcome of parental olfactory experience. The methylation status of specific odorant receptors, activated in parents, is passed on to the offspring. Furthermore, experimental evidence indicates an inverse correlation of gustatory and olfactory abilities with obesity. Such diverse lines of evidence emerging from basic and clinical research studies indicate a complex interplay of genetic factors, evolutionary forces, and epigenetic alterations. Environmental factors that regulate gustation and olfaction could induce epigenetic modulation. However, in turn, such modulation leads to variable effects depending on genetic makeup and physiological status. Therefore, a layered regulatory hierarchy remains active and is passed on to multiple generations. In the present review, we attempt to understand the experimental evidence that indicates variable regulatory mechanisms through multilayered and cross-reacting pathways. Our analytical approach will add to enhancement of prevailing therapeutic interventions and bring to the forefront the significance of chemosensory modalities for the evaluation and maintenance of long-term health.
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5
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Guzzetta KE, Cryan JF, O’Leary OF. Microbiota-Gut-Brain Axis Regulation of Adult Hippocampal Neurogenesis. Brain Plast 2022; 8:97-119. [PMID: 36448039 PMCID: PMC9661352 DOI: 10.3233/bpl-220141] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/12/2022] [Indexed: 11/15/2022] Open
Abstract
The birth, maturation, and integration of new neurons in the adult hippocampus regulates specific learning and memory processes, responses to stress, and antidepressant treatment efficacy. This process of adult hippocampal neurogenesis is sensitive to environmental stimuli, including peripheral signals from certain cytokines, hormones, and metabolites, which can promote or hinder the production and survival of new hippocampal neurons. The trillions of microorganisms resident to the gastrointestinal tract, collectively known as the gut microbiota, also demonstrate the ability to modulate adult hippocampal neurogenesis. In doing so, the microbiota-gut-brain axis can influence brain functions regulated by adult hippocampal neurogenesis. Unlike the hippocampus, the gut microbiota is highly accessible to direct interventions, such as prebiotics, probiotics, and antibiotics, and can be manipulated by lifestyle choices including diet. Therefore, understanding the pathways by which the gut microbiota shapes hippocampal neurogenesis may reveal novel targets for non-invasive therapeutics to treat disorders in which alterations in hippocampal neurogenesis have been implicated. This review first outlines the factors which influence both the gut microbiome and adult hippocampal neurogenesis, with cognizance that these effects might happen either independently or due to microbiota-driven mechanisms. We then highlight approaches for investigating the regulation of adult hippocampal neurogenesis by the microbiota-gut-brain axis. Finally, we summarize the current evidence demonstrating the gut microbiota's ability to influence adult hippocampal neurogenesis, including mechanisms driven through immune pathways, microbial metabolites, endocrine signalling, and the nervous system, and postulate implications for these effects in disease onset and treatment.
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Affiliation(s)
- Katherine E. Guzzetta
- 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
| | - Olivia F. O’Leary
- APC Microbiome Ireland, University College Cork, Cork, Ireland
- Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland
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6
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Liu G, Yu Q, Tan B, Ke X, Zhang C, Li H, Zhang T, Lu Y. Gut dysbiosis impairs hippocampal plasticity and behaviors by remodeling serum metabolome. Gut Microbes 2022; 14:2104089. [PMID: 35876011 PMCID: PMC9327780 DOI: 10.1080/19490976.2022.2104089] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Accumulating evidence suggests that gut microbiota as a critical mediator of gut-brain axis plays an important role in human health. Altered gut microbial profiles have been implicated in increasing the vulnerability of psychiatric disorders, such as autism, depression, and schizophrenia. However, the cellular and molecular mechanisms underlying the association remain unknown. Here, we modified the gut microbiome with antibiotics in newborn mice, and found that gut microbial alteration induced behavioral impairment by decreasing adult neurogenesis and long-term potentiation of synaptic transmission, and altering the gene expression profile in hippocampus. Reconstitution with normal gut flora produced therapeutic effects against both adult neurogenesis and behavioral deficits in the dysbiosis mice. Furthermore, our results show that circulating metabolites changes mediate the effect of gut dysbiosis on hippocampal plasticity and behavior outcomes. Elevating the serum 4-methylphenol, a small aromatic metabolite produced by gut bacteria, was found to induce autism spectrum disorder (ASD)-like behavior impairment and hippocampal dysfunction. Together our finding demonstrates that early-life gut dysbiosis and its correlated metabolites change contribute to hippocampal dysfunction and behavior impairment, hence highlight the potential microbiome-mediated therapies for treating psychiatric disorders.
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Affiliation(s)
- Guoqiang Liu
- Department of Physiology, School of Basic Medicine and Tongji Medical College, Huazhong University of Science and Technology, Wuhan, province, China,Wuhan Center of Brain Science, Huazhong University of Science and Technology, Wuhan, province, China
| | - Quntao Yu
- Department of Physiology, School of Basic Medicine and Tongji Medical College, Huazhong University of Science and Technology, Wuhan, province, China,Wuhan Center of Brain Science, Huazhong University of Science and Technology, Wuhan, province, China
| | - Bo Tan
- Department of Physiology, School of Basic Medicine and Tongji Medical College, Huazhong University of Science and Technology, Wuhan, province, China,Wuhan Center of Brain Science, Huazhong University of Science and Technology, Wuhan, province, China
| | - Xiao Ke
- Department of Physiology, School of Basic Medicine and Tongji Medical College, Huazhong University of Science and Technology, Wuhan, province, China,Wuhan Center of Brain Science, Huazhong University of Science and Technology, Wuhan, province, China
| | - Chen Zhang
- Department of Physiology, School of Basic Medicine and Tongji Medical College, Huazhong University of Science and Technology, Wuhan, province, China,Wuhan Center of Brain Science, Huazhong University of Science and Technology, Wuhan, province, China
| | - Hao Li
- Department of Physiology, School of Basic Medicine and Tongji Medical College, Huazhong University of Science and Technology, Wuhan, province, China,Wuhan Center of Brain Science, Huazhong University of Science and Technology, Wuhan, province, China,Department of Pathophysiology, School of Basic Medicine and Tongji Medical College, Huazhong University of Science and Technology, Wuhan, province, China
| | - Tongmei Zhang
- Department of Physiology, School of Basic Medicine and Tongji Medical College, Huazhong University of Science and Technology, Wuhan, province, China,Wuhan Center of Brain Science, Huazhong University of Science and Technology, Wuhan, province, China
| | - Youming Lu
- Department of Physiology, School of Basic Medicine and Tongji Medical College, Huazhong University of Science and Technology, Wuhan, province, China,Wuhan Center of Brain Science, Huazhong University of Science and Technology, Wuhan, province, China,Department of Pathophysiology, School of Basic Medicine and Tongji Medical College, Huazhong University of Science and Technology, Wuhan, province, China,CONTACT Youming Lu Department of Physiology, School of Basic Medicine and Tongji Medical College, Huazhong University of Science and Technology, Wuhan4030030, China
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7
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Dohm-Hansen S, Donoso F, Lucassen PJ, Clarke G, Nolan YM. The gut microbiome and adult hippocampal neurogenesis: A new focal point for epilepsy? Neurobiol Dis 2022; 170:105746. [DOI: 10.1016/j.nbd.2022.105746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2021] [Revised: 04/13/2022] [Accepted: 04/29/2022] [Indexed: 02/07/2023] Open
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8
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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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9
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Buyang Huanwu Decoction promotes neurogenesis via sirtuin 1/autophagy pathway in a cerebral ischemia model. Mol Med Rep 2021; 24:791. [PMID: 34515326 PMCID: PMC8441980 DOI: 10.3892/mmr.2021.12431] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Accepted: 08/12/2021] [Indexed: 12/21/2022] Open
Abstract
Stroke is one of the main causes of disease-related mortality worldwide. Buyang Huanwu Decoction (BHD) has been used to protect against stroke and stroke-induced disability for several years in China. Studies have shown that BHD can relieve neuronal damage in rats with cerebral ischemia/reperfusion (I/R) injury. However, the mechanism remains unclear. A middle cerebral artery occlusion and reperfusion (MCAO-R) model was used in the present study. The animals were treated with BHD (5, 10 and 20 g/kg) or rapamycin. Infarct size and modified neurological severity score were calculated on day 5 following MCAO-R surgery. Cellular changes around the ischemic penumbra were revealed by hematoxylin and eosin and Nissl staining. The protein expression levels of nestin, brain-derived neurotrophic factor (BDNF), doublecortin on the X chromosome (DCX) and autophagy-related proteins (beclin 1, LC3-II and p62) in the peri-ischemic area of the brain were detected. The results demonstrated that post-surgical treatment with BHD reduced the brain infarct size and improved neurological deficits in MCAO-R rats. BHD protected against MCAO-R-induced neuronal impairment and promoted neurogenesis, increased the protein expression of nestin, BDNF and DCX and markedly enhanced autophagy by increasing beclin 1 and LC3-II and decreasing p62. Meanwhile, BHD promoted the expression of sirtuin 1 (SIRT1), an important regulator of autophagy. In conclusion, the present study suggested that post-surgical treatment with BHD could protect rat brains from I/R injury, potentially through the SIRT1/autophagy pathway.
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10
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Bramorska A, Zarzycka W, Podolecka W, Kuc K, Brzezicka A. Age-Related Cognitive Decline May Be Moderated by Frequency of Specific Food Products Consumption. Nutrients 2021; 13:2504. [PMID: 34444664 PMCID: PMC8399560 DOI: 10.3390/nu13082504] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 07/18/2021] [Accepted: 07/18/2021] [Indexed: 02/06/2023] Open
Abstract
Our study aimed to evaluate whether the type of food products and the frequency of their consumption are associated with cognitive functioning in younger and older adults. The impact of diets that are high in added sugars and saturated fat on cognitive functioning, especially on memory, was at the center of our interest. Participants in the study were 204 healthy adults (aged 20-55) who performed a multitasking cognitive test and completed dietary and psychological questionnaires. Stepwise regression analysis with age and food consumption patterns as predictors, and the cognitive task performance as a dependent variable, revealed that cognitive task performance worsened with age. However, we found that the frequency of consuming different types of foods (healthy versus unhealthy dietary patterns) moderates the effects of age on cognitive functioning. Red meat and animal fat consumption were negatively correlated with cognitive performance, and this relation was dependent on the age of our participants. Conversely, white meat and fish consumption were positively related to memory. Different indices of dietary patterns (both positive and negative) were stronger predictors of cognitive performance in the older adult group. We interpret our results as evidence that diet may be a protective (or worsening) factor in age-related cognitive decline.
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Affiliation(s)
- Aleksandra Bramorska
- SWPS Institute of Psychology, University of Social Sciences and Humanities, 03-815 Warsaw, Poland; (W.Z.); (W.P.); (K.K.); (A.B.)
- Faculty of Information Technology, Polish-Japanese Academy of Information Technology, 02-008 Warsaw, Poland
| | - Wanda Zarzycka
- SWPS Institute of Psychology, University of Social Sciences and Humanities, 03-815 Warsaw, Poland; (W.Z.); (W.P.); (K.K.); (A.B.)
| | - Wiktoria Podolecka
- SWPS Institute of Psychology, University of Social Sciences and Humanities, 03-815 Warsaw, Poland; (W.Z.); (W.P.); (K.K.); (A.B.)
| | - Katarzyna Kuc
- SWPS Institute of Psychology, University of Social Sciences and Humanities, 03-815 Warsaw, Poland; (W.Z.); (W.P.); (K.K.); (A.B.)
| | - Aneta Brzezicka
- SWPS Institute of Psychology, University of Social Sciences and Humanities, 03-815 Warsaw, Poland; (W.Z.); (W.P.); (K.K.); (A.B.)
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Abstract
The enteric nervous system (ENS) is the largest division of the peripheral nervous system and closely resembles components and functions of the central nervous system. Although the central role of the ENS in congenital enteric neuropathic disorders, including Hirschsprung disease and inflammatory and functional bowel diseases, is well acknowledged, its role in systemic diseases is less understood. Evidence of a disordered ENS has accumulated in neurodegenerative diseases ranging from amyotrophic lateral sclerosis, Alzheimer disease and multiple sclerosis to Parkinson disease as well as neurodevelopmental disorders such as autism. The ENS is a key modulator of gut barrier function and a regulator of enteric homeostasis. A 'leaky gut' represents the gateway for bacterial and toxin translocation that might initiate downstream processes. Data indicate that changes in the gut microbiome acting in concert with the individual genetic background can modify the ENS, central nervous system and the immune system, impair barrier function, and contribute to various disorders such as irritable bowel syndrome, inflammatory bowel disease or neurodegeneration. Here, we summarize the current knowledge on the role of the ENS in gastrointestinal and systemic diseases, highlighting its interaction with various key players involved in shaping the phenotypes. Finally, current flaws and pitfalls related to ENS research in addition to future perspectives are also addressed.
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12
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Chok KC, Ng KY, Koh RY, Chye SM. Role of the gut microbiome in Alzheimer's disease. Rev Neurosci 2021; 32:767-789. [PMID: 33725748 DOI: 10.1515/revneuro-2020-0122] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2020] [Accepted: 02/19/2021] [Indexed: 02/06/2023]
Abstract
Alzheimer's disease (AD) is the most common form of dementia, affecting millions of individuals each year and this number is expected to significantly increase. The complicated microorganisms residing in human gut are closely associated with our health. Emerging evidence has suggested possible involvement of human gut microbiome in AD. Symbiotic gut microbiomes are known to maintain brain health by modulating host's barriers integrity, metabolic system, immune system, nervous system and endocrine system. However, in the event of gut dysbiosis and barriers disruption, gut pathobionts disrupt homeostasis of the metabolic system, immune system, nervous system, and endocrine system, resulting in deterioration of neurological functions and subsequently promoting development of AD. Multiple therapeutic approaches, such as fecal microbiome transplant, antibiotics, prebiotics, probiotics, symbiotic, and diet are discussed as potential treatment options for AD by manipulating the gut microbiome to reverse pathological alteration in the systems above.
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Affiliation(s)
- Kian Chung Chok
- School of Health Science, International Medical University, 57000Kuala Lumpur, Malaysia
| | - Khuen Yen Ng
- School of Pharmacy, Monash University Malaysia, 47500Selangor, Malaysia
| | - Rhun Yian Koh
- Division of Biomedical Science and Biotechnology, School of Health Science, International Medical University, No. 126, Jalan Jalil Perkasa 19, Bukit Jalil, 57000Kuala Lumpur, Malaysia
| | - Soi Moi Chye
- Division of Biomedical Science and Biotechnology, School of Health Science, International Medical University, No. 126, Jalan Jalil Perkasa 19, Bukit Jalil, 57000Kuala Lumpur, Malaysia
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13
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Buffo A, Ceruti S. Editorial overview: Modulation of neurogenesis. Curr Opin Pharmacol 2020; 50:96-99. [PMID: 32179439 DOI: 10.1016/j.coph.2020.03.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Annalisa Buffo
- Department of Neurosciences "Rita Levi Montalcini" - Università degli Studi di Torino, Turin, Italy; Neuroscience Institute Cavalieri Ottolenghi (NICO), Turin, Italy.
| | - Stefania Ceruti
- Department of Pharmacological and Biomolecular Sciences - Università degli Studi di Milano, Milan, Italy.
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