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Li X, Xu B, Yang H, Zhu Z. Gut Microbiota, Human Blood Metabolites, and Esophageal Cancer: A Mendelian Randomization Study. Genes (Basel) 2024; 15:729. [PMID: 38927665 PMCID: PMC11203100 DOI: 10.3390/genes15060729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2024] [Revised: 05/23/2024] [Accepted: 05/30/2024] [Indexed: 06/28/2024] Open
Abstract
BACKGROUND Unbalances in the gut microbiota have been proposed as a possible cause of esophageal cancer (ESCA), yet the exact causal relationship remains unclear. PURPOSE To investigate the potential causal relationship between the gut microbiota and ESCA with Mendelian randomization (MR) analysis. METHODS Genome-wide association studies (GWASs) of 207 gut microbial taxa (5 phyla, 10 classes, 13 orders, 26 families, 48 genera, and 105 species) and 205 gut microbiota metabolic pathways conducted by the Dutch Microbiome Project (DMP) and a FinnGen cohort GWAS of esophageal cancer specified the summary statistics. To investigate the possibility of a mediation effect between the gut microbiota and ESCA, mediation MR analyses were performed for 1091 blood metabolites and 309 metabolite ratios. RESULTS MR analysis indicated that the relative abundance of 10 gut microbial taxa was associated with ESCA but all the 12 gut microbiota metabolic pathways with ESCA indicated no statistically significant association existing. Two blood metabolites and a metabolite ratio were discovered to be mediating factors in the pathway from gut microbiota to ESCA. CONCLUSION This research indicated the potential mediating effects of blood metabolites and offered genetic evidence in favor of a causal correlation between gut microbiota and ESCA.
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Affiliation(s)
- Xiuzhi Li
- State Key Laboratory of Oncology in South China, Department of Thoracic Surgery, Sun Yat-sen University Cancer Center, Guangdong Provincial Clinical Research Center for Cancer, Collaborative Innovation Center for Cancer Medicine, Guangzhou 510060, China;
| | - Bingchen Xu
- State Key Laboratory of Oncology in South China, Department of Minimally Invasive Intervention, Sun Yat-sen University Cancer Center, Guangdong Provincial Clinical Research Center for Cancer, Collaborative Innovation Center for Cancer Medicine, Guangzhou 510060, China;
| | - Han Yang
- State Key Laboratory of Oncology in South China, Department of Thoracic Surgery, Sun Yat-sen University Cancer Center, Guangdong Provincial Clinical Research Center for Cancer, Collaborative Innovation Center for Cancer Medicine, Guangzhou 510060, China;
| | - Zhihua Zhu
- State Key Laboratory of Oncology in South China, Department of Thoracic Oncology, Sun Yat-sen University Cancer Center, Guangdong Provincial Clinical Research Center for Cancer, Collaborative Innovation Center for Cancer Medicine, Guangzhou 510060, China
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Ayten Ş, Bilici S. Modulation of Gut Microbiota Through Dietary Intervention in Neuroinflammation and Alzheimer's and Parkinson's Diseases. Curr Nutr Rep 2024; 13:82-96. [PMID: 38652236 PMCID: PMC11133127 DOI: 10.1007/s13668-024-00539-7] [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] [Accepted: 04/02/2024] [Indexed: 04/25/2024]
Abstract
PURPOSE OF REVIEW The gut microbiota plays a crucial role in the pathogenesis of neuroinflammation and Alzheimer's and Parkinson's diseases. One of the main modulators of the gut microbiota is the diet, which directly influences host homeostasis and biological processes. Some dietary patterns can affect neurodegenerative diseases' progression through gut microbiota composition, gut permeability, and the synthesis and secretion of microbial-derived neurotrophic factors and neurotransmitters. This comprehensive review critically assesses existing studies investigating the impact of dietary interventions on the modulation of the microbiota in relation to neurodegenerative diseases and neuroinflammation. RECENT FINDINGS There are limited studies on the effects of specific diets, such as the ketogenic diet, Mediterranean diet, vegetarian diet, and Western diet, on the progression of neuroinflammation and Alzheimer's and Parkinson's diseases through the gut-brain axis. The ketogenic diet displays promising potential in ameliorating the clinical trajectory of mild cognitive impairment and Alzheimer's disease. However, conflicting outcomes were observed among various studies, highlighting the need to consider diverse types of ketogenic diets and their respective effects on clinical outcomes and gut microbiota composition. Vegetarian and Mediterranean diets, known for their anti-inflammatory properties, can be effective against Parkinson's disease, which is related to inflammation in the gut environment. On the other hand, the westernization of dietary patterns was associated with reduced gut microbial diversity and metabolites, which ultimately contributed to the development of neuroinflammation and cognitive impairment. Various studies examining the impact of dietary interventions on the gut-brain axis with regard to neuroinflammation and Alzheimer's and Parkinson's diseases are thoroughly reviewed in this article. A strong mechanistic explanation is required to fully understand the complex interactions between various dietary patterns, gut microbiota, and microbial metabolites and the effects these interactions have on cognitive function and the progression of these diseases.
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Affiliation(s)
- Şerife Ayten
- Department of Nutrition and Dietetics, Gazi University, Ankara, Turkey.
| | - Saniye Bilici
- Department of Nutrition and Dietetics, Gazi University, Ankara, Turkey
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3
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Namiecinska M, Piatek P, Lewkowicz P. Nervonic Acid Synthesis Substrates as Essential Components in Profiled Lipid Supplementation for More Effective Central Nervous System Regeneration. Int J Mol Sci 2024; 25:3792. [PMID: 38612605 PMCID: PMC11011827 DOI: 10.3390/ijms25073792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Revised: 03/26/2024] [Accepted: 03/27/2024] [Indexed: 04/14/2024] Open
Abstract
Central nervous system (CNS) damage leads to severe neurological dysfunction as a result of neuronal cell death and axonal degeneration. As, in the mature CNS, neurons have little ability to regenerate their axons and reconstruct neural loss, demyelination is one of the hallmarks of neurological disorders such as multiple sclerosis (MS). Unfortunately, remyelination, as a regenerative process, is often insufficient to prevent axonal loss and improve neurological deficits after demyelination. Currently, there are still no effective therapeutic tools to restore neurological function, but interestingly, emerging studies prove the beneficial effects of lipid supplementation in a wide variety of pathological processes in the human body. In the future, available lipids with a proven beneficial effect on CNS regeneration could be included in supportive therapy, but this topic still requires further studies. Based on our and others' research, we review the role of exogenous lipids, pointing to substrates that are crucial in the remyelination process but are omitted in available studies, justifying the properly profiled supply of lipids in the human diet as a supportive therapy during CNS regeneration.
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Affiliation(s)
- Magdalena Namiecinska
- Department of Immunogenetics, Medical University of Lodz, Pomorska 251/A4 Street, 92-213 Lodz, Poland; (P.P.); (P.L.)
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Ahmad F, Karan A, Sharma R, Sharma NS, Sundar V, Jayaraj R, Mukherjee S, DeCoster MA. Evolving therapeutic interventions for the management and treatment of Alzheimer's disease. Ageing Res Rev 2024; 95:102229. [PMID: 38364913 DOI: 10.1016/j.arr.2024.102229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2023] [Revised: 12/11/2023] [Accepted: 02/10/2024] [Indexed: 02/18/2024]
Abstract
Alzheimer's Disease (AD) patients experience diverse symptoms, including memory loss, cognitive impairment, behavioral abnormalities, mood changes, and mental issues. The fundamental objective of this review is to discuss novel therapeutic approaches, with special emphasis on recently approved marketed formulations for the treatment of AD, especially Aducanumab, the first FDA approved moiety that surpasses the blood-brain barrier (BBB) and reduces amyloid plaques in the brain, thereby reducing associated cognitive decline. However, it is still in the phase IV trial and is to be completed by 2030. Other drugs such as lecanemab are also under clinical trial and has recently been approved by the FDA and is also discussed here. In this review, we also focus on active and passive immunotherapy for AD as well as several vaccines, such as amyloid-beta epitope-based vaccines, amyloid-beta DNA vaccines, and stem cell therapy for AD, which are in clinical trials. Furthermore, ongoing pre-clinical trials associated with AD and other novel strategies such as curcumin-loaded nanoparticles, Crispr/ cas9, precision medicine, as well as some emerging therapies like anti-sense therapy are also highlighted. Additionally, we discuss some off-labeled drugs like non-steroidal anti-inflammatory drugs (NSAID), anti-diabetic drugs, and lithium, which can manage symptoms of AD and different non-pharmacological approaches are also covered which can help to manage AD. In summary, we have tried to cover all the therapeutic interventions which are available for the treatment and management of AD under sections approved, clinical phase, pre-clinical phase or futuristic interventions, off-labelled drugs, and non-pharmacological interventions for AD, offering positive findings and well as challenges that remain.
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Affiliation(s)
- Faizan Ahmad
- Department of Medical Elementology and Toxicology, Jamia Hamdard University, Delhi, India
| | - Anik Karan
- Department of Mechanical and Bioengineering, University of Kansas, Lawrence, KS, USA.
| | - Rashi Sharma
- Department of Biotechnology, Delhi Technological University, Bawana, Delhi, India
| | - Navatha Shree Sharma
- Department of Surgery Transplant, University of Nebraska Medical Centre, Omaha, NE, USA
| | - Vaishnavi Sundar
- Department of Internal Medicine, University of Nebraska Medical Centre, Omaha, NE, USA
| | - Richard Jayaraj
- Department of Paediatrics, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, UAE
| | - Sudip Mukherjee
- Biomedical Engineering, Indian Institute of Technology- Banaras Hindu University, Varanasi, Uttar Pradesh, India
| | - Mark A DeCoster
- Cellular Neuroscience Laboratory, Biomedical Engineering, College of Engineering and Science, Louisiana Tech University, Ruston, LA, USA; Cellular Neuroscience Laboratory, Institute for Micromanufacturing, College of Engineering and Science, Louisiana Tech University, Ruston, LA, USA.
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Song J, Li M, Kang N, Jin W, Xiao Y, Li Z, Qi Q, Zhang J, Duan Y, Feng X, Lv P. Baicalein ameliorates cognitive impairment of vascular dementia rats via suppressing neuroinflammation and regulating intestinal microbiota. Brain Res Bull 2024; 208:110888. [PMID: 38295883 DOI: 10.1016/j.brainresbull.2024.110888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 12/21/2023] [Accepted: 01/22/2024] [Indexed: 02/03/2024]
Abstract
Neuroinflammation induced by chronic cerebral hypoperfusion (CCH) plays a crucial role in the pathophysiologic mechanisms of vascular dementia (VD). A growing body of research has found that intestinal microbiota is associated with a variety of central nervous system disorders and that there is a relationship between intestinal microbiota dysbiosis and cognitive dysfunction and inflammatory responses. Baicalein belongs to the class of flavonoids and has a variety of biological functions, including anti-inflammatory, antioxidant and anti-apoptotic. Baicalein has a significant improvement in memory and learning, and can be used as a potential drug for the protection and treatment of central nervous system disorders. Whether baicalein has an ameliorative effect on cognitive impairment in VD, and whether its mechanism is related to the inhibition of inflammatory response and regulation of intestinal microbiota has not been reported. We used bilateral common carotid artery occlusion (BCCAO) to establish a VD rat model. Morris water maze (MWM) test showed that baicalein improved cognitive dysfunction in VD rats. We applied HE staining, immunofluorescence and ELISA to observe that baicalein treatment significantly improved CCH-induced neuronal damage in the CA1 region of the hippocampus, and reduced glial cell activation and release of pro-inflammatory factors. Western blot showed that baicalein inhibited the activation of the TLR4/MyD88/NF-κB signaling pathway in VD rats. We applied 16 S rDNA sequencing to analyze the composition of the intestinal microbiota. The results showed that baicalein modulated the diversity and composition of the intestinal microbiota, and suppressed the relative abundance of inflammation-associated microbiota in VD rats. In conclusion, this study found that baicalein ameliorated cognitive impairment, attenuated hippocampal inflammatory responses, inhibited the TLR4/MyD88/NF-κB signaling pathway, and modulated intestinal microbiota in VD rats.
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Affiliation(s)
- Jiaxi Song
- Department of Neurology, Hebei Medical University, Shijiazhuang, Hebei, People's Republic of China; Department of Neurology, Hebei General Hospital, Shijiazhuang, Hebei, People's Republic of China; Hebei Provincial Key Laboratory of Cerebral Networks and Cognitive Disorders, Shijiazhuang, Hebei, People's Republic of China
| | - Meixi Li
- Department of Neurology, Hebei General Hospital, Shijiazhuang, Hebei, People's Republic of China; Hebei Provincial Key Laboratory of Cerebral Networks and Cognitive Disorders, Shijiazhuang, Hebei, People's Republic of China
| | - Ning Kang
- Department of Neurology, Hebei General Hospital, Shijiazhuang, Hebei, People's Republic of China; Hebei Provincial Key Laboratory of Cerebral Networks and Cognitive Disorders, Shijiazhuang, Hebei, People's Republic of China
| | - Wei Jin
- Department of Neurology, Hebei General Hospital, Shijiazhuang, Hebei, People's Republic of China; Hebei Provincial Key Laboratory of Cerebral Networks and Cognitive Disorders, Shijiazhuang, Hebei, People's Republic of China
| | - Yining Xiao
- Department of Neurology, Hebei General Hospital, Shijiazhuang, Hebei, People's Republic of China; Hebei Provincial Key Laboratory of Cerebral Networks and Cognitive Disorders, Shijiazhuang, Hebei, People's Republic of China
| | - Zhe Li
- Department of Neurology, Hebei General Hospital, Shijiazhuang, Hebei, People's Republic of China
| | - Qianqian Qi
- Department of Neurology, Hebei Medical University, Shijiazhuang, Hebei, People's Republic of China; Department of Neurology, Hebei General Hospital, Shijiazhuang, Hebei, People's Republic of China; Hebei Provincial Key Laboratory of Cerebral Networks and Cognitive Disorders, Shijiazhuang, Hebei, People's Republic of China
| | - Jiayu Zhang
- Department of Neurology, Hebei General Hospital, Shijiazhuang, Hebei, People's Republic of China; Hebei Provincial Key Laboratory of Cerebral Networks and Cognitive Disorders, Shijiazhuang, Hebei, People's Republic of China
| | - Yaxin Duan
- Department of Neurology, Hebei General Hospital, Shijiazhuang, Hebei, People's Republic of China; Hebei Provincial Key Laboratory of Cerebral Networks and Cognitive Disorders, Shijiazhuang, Hebei, People's Republic of China
| | - Xiaoxiao Feng
- Department of Neurology, Shijiazhuang People's Hospital, Shijiazhuang, Hebei, People's Republic of China
| | - Peiyuan Lv
- Department of Neurology, Hebei Medical University, Shijiazhuang, Hebei, People's Republic of China; Department of Neurology, Hebei General Hospital, Shijiazhuang, Hebei, People's Republic of China; Hebei Provincial Key Laboratory of Cerebral Networks and Cognitive Disorders, Shijiazhuang, Hebei, People's Republic of China.
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Mateo D, Marquès M, Domingo JL, Torrente M. Influence of gut microbiota on the development of most prevalent neurodegenerative dementias and the potential effect of probiotics in elderly: A scoping review. Am J Med Genet B Neuropsychiatr Genet 2024; 195:e32959. [PMID: 37850544 DOI: 10.1002/ajmg.b.32959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 08/29/2023] [Accepted: 09/19/2023] [Indexed: 10/19/2023]
Abstract
Dementia is one of today's greatest public health challenges. Its high socio-economic impact and difficulties in diagnosis and treatment are of increasing concern to an aging world population. In recent years, the study of the relationship between gut microbiota and different neurocognitive disorders has gained a considerable interest. Several studies have reported associations between gut microbiota dysbiosis and some types of dementia. Probiotics have been suggested to restore dysbiosis and to improve neurocognitive symptomatology in these dementias. Based on these previous findings, the available scientific evidence on the gut microbiota in humans affected by the most prevalent dementias, as well as the probiotic trials conducted in these patients in recent years, have been here reviewed. Decreased concentrations of short-chain fatty acids (SCFA) and other bacterial metabolites appear to play a major role in the onset of neurocognitive symptoms in Alzheimer disease (AD) and Parkinson disease dementia (PDD). Increased abundance of proinflammatory taxa could be closely related to the more severe clinical symptoms in both, as well as in Lewy Bodies dementia. Important lack of information was noted in Frontotemporal dementia behavioral variant. Moreover, geographical differences in the composition of the gut microbiota have been reported in AD. Some potential beneficial effects of probiotics in AD and PDD have been reported. However, due to the controversial results further investigations are clearly necessary.
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Affiliation(s)
- David Mateo
- Laboratory of Toxicology and Environmental Health - TecnATox, School of Medicine, Universitat Rovira i Virgili, Reus, Catalonia, Spain
| | - Montse Marquès
- Laboratory of Toxicology and Environmental Health - TecnATox, School of Medicine, Universitat Rovira i Virgili, Reus, Catalonia, Spain
| | - José L Domingo
- Laboratory of Toxicology and Environmental Health - TecnATox, School of Medicine, Universitat Rovira i Virgili, Reus, Catalonia, Spain
| | - Margarita Torrente
- Laboratory of Toxicology and Environmental Health - TecnATox, School of Medicine, Universitat Rovira i Virgili, Reus, Catalonia, Spain
- Department of Psychology, CRAMC (Research Center for Behaviour Assessment), Faculty of Education Sciences and Psychology, Universitat Rovira i Virgili, Tarragona, Catalonia, Spain
- Institute Lerin Neurocognitive, Alzheimer and other Neurocognitive Disorders Association, Reus, Catalonia, Spain
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Aghighi F, Salami M. What we need to know about the germ-free animal models. AIMS Microbiol 2024; 10:107-147. [PMID: 38525038 PMCID: PMC10955174 DOI: 10.3934/microbiol.2024007] [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: 12/03/2023] [Revised: 01/30/2024] [Accepted: 02/01/2024] [Indexed: 03/26/2024] Open
Abstract
The gut microbiota (GM), as a forgotten organ, refers to the microbial community that resides in the gastrointestinal tract and plays a critical role in a variety of physiological activities in different body organs. The GM affects its targets through neurological, metabolic, immune, and endocrine pathways. The GM is a dynamic system for which exogenous and endogenous factors have negative or positive effects on its density and composition. Since the mid-twentieth century, laboratory animals are known as the major tools for preclinical research; however, each model has its own limitations. So far, two main models have been used to explore the effects of the GM under normal and abnormal conditions: the isolated germ-free and antibiotic-treated models. Both methods have strengths and weaknesses. In many fields of host-microbe interactions, research on these animal models are known as appropriate experimental subjects that enable investigators to directly assess the role of the microbiota on all features of physiology. These animal models present biological model systems to either study outcomes of the absence of microbes, or to verify the effects of colonization with specific and known microbial species. This paper reviews these current approaches and gives advantages and disadvantages of both models.
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Affiliation(s)
| | - Mahmoud Salami
- Physiology Research Center, Institute for Basic Sciences, Kashan University of Medical Sciences, Kashan, I. R. Iran
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Elangovan A, Dahiya B, Kirola L, Iyer M, Jeeth P, Maharaj S, Kumari N, Lakhanpal V, Michel TM, Rao KRSS, Cho SG, Yadav MK, Gopalakrishnan AV, Kadhirvel S, Kumar NS, Vellingiri B. Does gut brain axis has an impact on Parkinson's disease (PD)? Ageing Res Rev 2024; 94:102171. [PMID: 38141735 DOI: 10.1016/j.arr.2023.102171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 12/04/2023] [Accepted: 12/13/2023] [Indexed: 12/25/2023]
Abstract
Parkinson's Disease (PD) is becoming a growing global concern by being the second most prevalent disease next to Alzheimer's Disease (AD). Henceforth new exploration is needed in search of new aspects towards the disease mechanism and origin. Evidence from recent studies has clearly stated the role of Gut Microbiota (GM) in the maintenance of the brain and as a root cause of various diseases and disorders including other neurological conditions. In the case of PD, with an unknown etiology, the GM is said to have a larger impact on the disease pathophysiology. Although GM and its metabolites are crucial for maintaining the normal physiology of the host, it is an undeniable fact that there is an influence of GM in the pathophysiology of PD. As such the Enteroendocrine Cells (EECs) in the epithelium of the intestine are one of the significant regulators of the gut-brain axis and act as a communication mediator between the gut and the brain. The communication is established via the molecules of neuroendocrine which are said to have a crucial part in neurological diseases such as AD, PD, and other psychiatry-related disorders. This review is focused on understanding the proper role of GM and EECs in PD. Here, we also focus on some of the metabolites and compounds that can interact with the PD genes causing various dysfunctions in the cell and facilitating the disease conditions using bioinformatical tools. Various mechanisms concerning EECs and PD, their identification, the latest studies, and available current therapies have also been discussed.
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Affiliation(s)
- Ajay Elangovan
- Human Cytogenetics and Stem Cell Laboratory, Department of Zoology, School of Basic Sciences, Central University of Punjab, Bathinda 151401, Punjab, India
| | - Bhawna Dahiya
- Human Cytogenetics and Stem Cell Laboratory, Department of Zoology, School of Basic Sciences, Central University of Punjab, Bathinda 151401, Punjab, India
| | - Laxmi Kirola
- Department of Biotechnology, School of Health Sciences and Technology (SoHST), UPES University, Dehradun, Uttarakhand 248007, India
| | - Mahalaxmi Iyer
- Department of Microbiology, Central University of Punjab, Bathinda 151401, Punjab, India; Department of Biotechnology, Karpagam Academy of Higher Education (Deemed to be University), Coimbatore 641021, Tamil Nadu, India
| | - Priyanka Jeeth
- Department of Computational Sciences, Central University of Punjab, Bathinda 151401, Punjab, India
| | - Sakshi Maharaj
- Department of Zoology, School of Basic Sciences, Central University of Punjab, Bathinda 151401, Punjab, India
| | - Nikki Kumari
- Department of Zoology, School of Basic Sciences, Central University of Punjab, Bathinda 151401, Punjab, India
| | - Vikas Lakhanpal
- Department of Neurology, All India Institute of Medical Sciences, Bathinda 151005, Punjab, India
| | - Tanja Maria Michel
- Research Unit of Psychiatry, Dept. of Psychiatry Odense, Clinical Institute, University of Southern Denmark, J.B. Winslowsvej 20, Indg. 220B, Odense, Denmark
| | - K R S Sambasiva Rao
- Mangalayatan University - Jabalpur, Jabalpur - 481662, Madhya Pradesh, India
| | - Ssang-Goo Cho
- Department of Stem Cell and Regenerative Biotechnology, Molecular & Cellular Reprogramming Center and Institute of Advanced Regenerative Science, Konkuk University, 120 Neungdong-ro Gwangjin-gu, Seoul 05029, Republic of Korea
| | - Mukesh Kumar Yadav
- Department of Microbiology, Central University of Punjab, Bathinda 151401, Punjab, India
| | - Abilash Valsala Gopalakrishnan
- Department of Biomedical Sciences, School of Biosciences and Technology, Vellore Institute of Technology, Vellore 632 014, India
| | - Saraboji Kadhirvel
- Department of Computational Sciences, Central University of Punjab, Bathinda 151401, Punjab, India
| | - Nachimuthu Senthil Kumar
- Department of Biotechnology, Mizoram University (A Central University), Aizawl, 796 004 Mizoram, India
| | - Balachandar Vellingiri
- Human Cytogenetics and Stem Cell Laboratory, Department of Zoology, School of Basic Sciences, Central University of Punjab, Bathinda 151401, Punjab, India.
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Ji D, Chen WZ, Zhang L, Zhang ZH, Chen LJ. Gut microbiota, circulating cytokines and dementia: a Mendelian randomization study. J Neuroinflammation 2024; 21:2. [PMID: 38178103 PMCID: PMC10765696 DOI: 10.1186/s12974-023-02999-0] [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: 06/26/2023] [Accepted: 12/16/2023] [Indexed: 01/06/2024] Open
Abstract
BACKGROUND Some studies have shown that gut microbiota may be associated with dementia. However, the causal effects between gut microbiota and different types of dementia and whether cytokines act as a mediator remain unclear. METHODS Gut microbiota, cytokines, and five dementia types, including Alzheimer's disease (AD), frontotemporal dementia (FTD), dementia with Lewy body (DLB), vascular dementia (VD), and Parkinson's disease dementia (PDD) were identified from large-scale genome-wide association studies (GWAS) summary data. We used Mendelian randomization (MR) to investigate the causal relationships between gut microbiota, cytokines, and five types of dementia. Inverse variance weighting (IVW) was used as the main statistical method. In addition, we explored whether cytokines act as a mediating factor in the pathway from gut microbiota to dementia. RESULTS There were 20 positive and 16 negative causal effects between genetic liability in the gut microbiota and dementia. Also, there were five positive and four negative causal effects between cytokines and dementias. Cytokines did not act as mediating factors. CONCLUSIONS Gut microbiota and cytokines were causally associated with five types of dementia, and cytokines seemed not to be the mediating factors in the pathway from gut microbiota to dementia.
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Affiliation(s)
- Dong Ji
- Department of Anesthesiology, The First Affiliated Hospital of Anhui Medical University, No.218 Jixi Road, Shushan District, Hefei, Anhui, China
| | - Wen-Zhu Chen
- Department of Anesthesiology, The First Affiliated Hospital of Anhui Medical University, No.218 Jixi Road, Shushan District, Hefei, Anhui, China
| | - Lei Zhang
- Department of Anesthesiology, The First Affiliated Hospital of Anhui Medical University, No.218 Jixi Road, Shushan District, Hefei, Anhui, China
| | - Zhi-Hua Zhang
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, Hefei, Anhui, China
| | - Li-Jian Chen
- Department of Anesthesiology, The First Affiliated Hospital of Anhui Medical University, No.218 Jixi Road, Shushan District, Hefei, Anhui, China.
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Sproten R, Nohr D, Guseva D. Nutritional strategies modulating the gut microbiome as a preventative and therapeutic approach in normal and pathological age-related cognitive decline: a systematic review of preclinical and clinical findings. Nutr Neurosci 2024:1-16. [PMID: 38165747 DOI: 10.1080/1028415x.2023.2296727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2024]
Abstract
CONTEXT The proportion of the elderly population is on the rise across the globe, and with it the prevalence of age-related neurodegenerative diseases. The gut microbiota, whose composition is highly regulated by dietary intake, has emerged as an exciting research field in neurology due to its pivotal role in modulating brain functions via the gut-brain axis. OBJECTIVES We aimed at conducting a systematic review of preclinical and clinical studies investigating the effects of dietary interventions on cognitive ageing in conjunction with changes in gut microbiota composition and functionality. METHODS PubMed and Scopus were searched using terms related to ageing, cognition, gut microbiota and dietary interventions. Studies were screened, selected based on previously determined inclusion and exclusion criteria, and evaluated for methodological quality using recommended risk of bias assessment tools. RESULTS A total of 32 studies (18 preclinical and 14 clinical) were selected for inclusion. We found that most of the animal studies showed significant positive intervention effects on cognitive behavior, while outcomes on cognition, microbiome features, and health parameters in humans were less pronounced. The effectiveness of dietary interventions depended markedly on the age, gender, degree of cognitive decline and baseline microbiome composition of participants. CONCLUSION To harness the full potential of microbiome-inspired nutrition for cognitive health, one of the main challenges remains to better understand the interplay between host, his microbiome, dietary exposures, whilst also taking into account environmental influences. Future research should aim toward making use of host-specific microbiome data to guide the development of personalized therapies.
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Affiliation(s)
- Rieke Sproten
- Institute of Nutritional Medicine, University of Hohenheim, Stuttgart, Germany
| | - Donatus Nohr
- Institute of Nutritional Medicine, University of Hohenheim, Stuttgart, Germany
| | - Daria Guseva
- Institute of Nutritional Medicine, University of Hohenheim, Stuttgart, Germany
- Institute of Child Nutrition, Max Rubner-Institut, Federal Research Institute of Nutrition and Food, Karlsruhe, Germany
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11
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Klee M, Aho VTE, May P, Heintz-Buschart A, Landoulsi Z, Jónsdóttir SR, Pauly C, Pavelka L, Delacour L, Kaysen A, Krüger R, Wilmes P, Leist AK. Education as Risk Factor of Mild Cognitive Impairment: The Link to the Gut Microbiome. J Prev Alzheimers Dis 2024; 11:759-768. [PMID: 38706292 PMCID: PMC11060993 DOI: 10.14283/jpad.2024.19] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Accepted: 12/03/2023] [Indexed: 05/07/2024]
Abstract
BACKGROUND With differences apparent in the gut microbiome in mild cognitive impairment (MCI) and dementia, and risk factors of dementia linked to alterations of the gut microbiome, the question remains if gut microbiome characteristics may mediate associations of education with MCI. OBJECTIVES We sought to examine potential mediation of the association of education and MCI by gut microbiome diversity or composition. DESIGN Cross-sectional study. SETTING Luxembourg, the Greater Region (surrounding areas in Belgium, France, Germany). PARTICIPANTS Control participants of the Luxembourg Parkinson's Study. MEASUREMENTS Gut microbiome composition, ascertained with 16S rRNA gene amplicon sequencing. Differential abundance, assessed across education groups (0-10, 11-16, 16+ years of education). Alpha diversity (Chao1, Shannon and inverse Simpson indices). Mediation analysis with effect decomposition was conducted with education as exposure, MCI as outcome and gut microbiome metrics as mediators. RESULTS After exclusion of participants below 50, or with missing data, n=258 participants (n=58 MCI) were included (M [SD] Age=64.6 [8.3] years). Higher education (16+ years) was associated with MCI (Odds ratio natural direct effect=0.35 [95% CI 0.15-0.81]. Streptococcus and Lachnospiraceae-UCG-001 genera were more abundant in higher education. CONCLUSIONS Education is associated with gut microbiome composition and MCI risk without clear evidence for mediation. However, our results suggest signatures of the gut microbiome that have been identified previously in AD and MCI to be reflected in lower education and suggest education as important covariate in microbiome studies.
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Affiliation(s)
- M Klee
- Matthias Klee, University of Luxembourg, Institute for Research on Socio-Economic Inequality, Department of Social Sciences, 11, Porte des Sciences, L-4366, Esch-sur-Alzett, Luxembourg, Mail: , Phone: +352 46 66 44 5161
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Yuan J, Tan H, Cheng Y, Ma X, Jiang S, Hou X, Li S, Shi L, Li P, Xu H, Lv J, Han B. Air particulate pollution exposure associated with impaired cognition via microbiota gut-brain axis: an evidence from rural elderly female in northwest China. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:6398-6410. [PMID: 38151560 DOI: 10.1007/s11356-023-31504-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Accepted: 12/08/2023] [Indexed: 12/29/2023]
Abstract
This study aimed to reveal harm of exposure to indoor air pollution to cognitive function through "gut-brain-axis" among rural elderly residents. There were 120 participants recruited in rural villages of northwest China from December 2021 to February 2022. The cognitive level was assessed by eight-item ascertain dementia (AD) questionnaire, and indoor air pollution exposure was measured by air quality sensor. Inflammatory cytokines and oxidative stress-related index were detected in blood serum. Fecal samples were collected for gut microbiota analysis. The 120 participants were divided into impaired cognition (AD8) (81/67.5%) and cognition normal (NG) (39/32.5%). And there had more female in AD8 (FAD) (55/67.9%) than NG (FNG) (18/46.2%) (P = 0.003). Exposure of air pollution in FAD was higher than FNG (PM1, PM2.5, PM10, P < 0.001; NO2, P < 0.001; CO, P = 0.014; O3, P = 0.002). The risk of cognitive impairment increases 6.8%, 3.6%, 2.6%, 11%, and 2.4% in female for every 1 μg/m3 increased in exposure of PM1, PM2.5, PM10, NO2, and O3, separately. And GSH-Px and T-SOD in FAD were significantly lower than the FNG group (P = 0.011, P = 0.019). Gut microbiota in FAD is disordered with lower richness and diversity. Relative abundance of core bacteria Faecalibacterium (top 1 genus) in FAD was reduced (13.65% vs 19.81%, P = 0.0235), while Escherichia_Shigella and Akkermansia was increased. Correlation analysis showed Faecalibacterium was negatively correlated with age, and exposure of O3, PM1, PM2.5, and PM10; Akkermansia and Monoglobus were positively correlated with exposure of PM1, PM2.5 and PM10; Escherichia_Shigella was significantly positively correlated with NO2. Indoor air pollution exposure impaired cognitive function in elderly people, especially female, which may cause systemic inflammation, dysbiosis of the gut microbiota, and ultimately leading to early cognitive impairment through the gut-brain axis.
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Affiliation(s)
- Jia Yuan
- School of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, China
| | - Hui Tan
- Department of Rehabilitation Medicine, the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Yue Cheng
- School of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, China
- Key Laboratory for Disease Prevention and Control and Health Promotion of Shaanxi Province, Xi'an, 710061, Shaanxi, China
| | - Xinxin Ma
- School of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, China
| | - Sijin Jiang
- School of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, China
| | - Xinyao Hou
- School of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, China
| | - Shaoru Li
- School of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, China
- Key Laboratory for Disease Prevention and Control and Health Promotion of Shaanxi Province, Xi'an, 710061, Shaanxi, China
| | - Lu Shi
- School of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, China
| | - Pu Li
- School of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, China
| | - Hongmei Xu
- School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, 710049, Shaanxi, China
| | - Jia Lv
- School of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, China
- Key Laboratory for Disease Prevention and Control and Health Promotion of Shaanxi Province, Xi'an, 710061, Shaanxi, China
| | - Bei Han
- School of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, China.
- Key Laboratory for Disease Prevention and Control and Health Promotion of Shaanxi Province, Xi'an, 710061, Shaanxi, China.
- Key Laboratory of Environment and Genes Related to Diseases (Xi'an Jiaotong University), Ministry of Education, Xi'an, China.
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Patil RS, Tupe RS. Communal interaction of glycation and gut microbes in diabetes mellitus, Alzheimer's disease, and Parkinson's disease pathogenesis. Med Res Rev 2024; 44:365-405. [PMID: 37589449 DOI: 10.1002/med.21987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 07/12/2023] [Accepted: 08/06/2023] [Indexed: 08/18/2023]
Abstract
Diabetes and its complications, Alzheimer's disease (AD), and Parkinson's disease (PD) are increasing gradually, reflecting a global threat vis-à-vis expressing the essentiality of a substantial paradigm shift in research and remedial actions. Protein glycation is influenced by several factors, like time, temperature, pH, metal ions, and the half-life of the protein. Surprisingly, most proteins associated with metabolic and neurodegenerative disorders are generally long-lived and hence susceptible to glycation. Remarkably, proteins linked with diabetes, AD, and PD share this characteristic. This modulates protein's structure, aggregation tendency, and toxicity, highlighting renovated attention. Gut microbes and microbial metabolites marked their importance in human health and diseases. Though many scientific shreds of evidence are proposed for possible change and dysbiosis in gut flora in these diseases, very little is known about the mechanisms. Screening and unfolding their functionality in metabolic and neurodegenerative disorders is essential in hunting the gut treasure. Therefore, it is imperative to evaluate the role of glycation as a common link in diabetes and neurodegenerative diseases, which helps to clarify if modulation of nonenzymatic glycation may act as a beneficial therapeutic strategy and gut microbes/metabolites may answer some of the crucial questions. This review briefly emphasizes the common functional attributes of glycation and gut microbes, the possible linkages, and discusses current treatment options and therapeutic challenges.
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Affiliation(s)
- Rahul Shivaji Patil
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Rashmi Santosh Tupe
- Symbiosis School of Biological Sciences (SSBS), Symbiosis International (Deemed University) (SIU), Pune, Maharashtra, India
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Khan Z, Mehan S, Saifi MA, Das Gupta G, Narula AS, Kalfin R. Proton Pump Inhibitors and Cognitive Health: Review on Unraveling the Dementia Connection and Co-morbid Risks. Curr Alzheimer Res 2024; 20:739-757. [PMID: 38424433 PMCID: PMC11107432 DOI: 10.2174/0115672050289946240223050737] [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: 10/28/2023] [Revised: 01/28/2024] [Accepted: 01/31/2024] [Indexed: 03/02/2024]
Abstract
Dementia, an international health issue distinguished by the impairment of daily functioning due to cognitive decline, currently affects more than 55 million people worldwide, with the majority residing in low-income and middle-income countries. Globally, dementia entails significant economic burdens in 2019, amounting to a cost of 1.3 trillion US dollars. Informal caregivers devote considerable hours to providing care for those affected. Dementia imposes a greater caregiving and disability-adjusted life-year burden on women. A recent study has established a correlation between prolonged Proton Pump Inhibitor (PPI) usage and dementia, in addition to other neurodegenerative conditions. PPIs are frequently prescribed to treat peptic ulcers and GERD (gastroesophageal reflux disease) by decreasing stomach acid secretion. They alleviate acid-related symptoms through the inhibition of acid-secreting H+-K+ ATPase. In a number of observational studies, cognitive decline and dementia in the elderly have been linked to the use of PPIs. The precise mechanism underlying this relationship is unknown. These drugs might also alter the pH of brain cells, resulting in the accumulation of amyloid-beta (Aβ) peptides and the development of Alzheimer's disease (AD). Despite the compelling evidence supporting the association of PPIs with dementia, the results of studies remain inconsistent. The absence of a correlation between PPI use and cognitive decline in some studies emphasizes the need for additional research. Chronic PPI use can conceal underlying conditions, including cancer, celiac disease, vitamin B12 deficiency, and renal injury, highlighting dementia risk and the need for further investigations on cognitive health.
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Affiliation(s)
- Zuber Khan
- Division of Neuroscience, Department of Pharmacology, ISF College of Pharmacy, Moga, Punjab, India (Affiliated to IK Gujral Punjab Technical University), Jalandhar, Punjab, 144603, India;
| | - Sidharth Mehan
- Division of Neuroscience, Department of Pharmacology, ISF College of Pharmacy, Moga, Punjab, India (Affiliated to IK Gujral Punjab Technical University), Jalandhar, Punjab, 144603, India;
| | - Mohd. Anas Saifi
- Department of Medical Elementology and Toxicology, School of Chemical and Life Sciences, Jamia Hamdard, New Delhi-110062, India;
| | - Ghanshyam Das Gupta
- Department of Pharmaceutics, ISF College of Pharmacy, Moga, Punjab, India (Affiliated to IK Gujral Punjab Technical University), Jalandhar, Punjab, 144603, India;
| | - Acharan S. Narula
- Narula Research, LLC, 107 Boulder Bluff, Chapel Hill, NC 27516, USA;
| | - Reni Kalfin
- Institute of Neurobiology, Bulgarian Academy of Sciences, Acad. G. Bonchev St., Block 23, Sofia 1113, Bulgaria;
- Department of Healthcare, South-West University “NeofitRilski”, Ivan Mihailov St. 66, Blagoevgrad 2700, Bulgaria
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Leal-Martinez F, Jimenez Ramirez G, Ibarra A. Nutritional Support System (NSS) as a New Therapeutic Strategy for Cerebral Palsy. CNS & NEUROLOGICAL DISORDERS DRUG TARGETS 2024; 23:271-277. [PMID: 37005522 DOI: 10.2174/1871527322666230330124124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Revised: 02/24/2023] [Accepted: 02/26/2023] [Indexed: 04/04/2023]
Abstract
Cerebral palsy (CP) is part of a group of nonprogressive motor disorders. The disease affects movement and posture and constitutes the most frequent cause of motor disability in childhood. CP is characterized by spasticity, reflecting lesions in the pyramidal pathway. Treatment is currently focused on physical rehabilitation, and the annual progression of the disease is 2-3%. About 60% of these patients present severe degrees of malnutrition associated with dysphagia, gastrointestinal abnormalities, malabsorption, increased metabolism, and depression. These alterations promote sarcopenia functional dependence and affect the quality of life and delay the evolution of motor skills. Currently, there is evidence that the supplementation of several nutrients, dietary correction, and probiotics can improve neurological response by stimulating neuroplasticity, neuroregeneration, neurogenesis, and myelination. This therapeutic strategy could shorten the response period to treatment and increase both gross and fine motor skills. The interaction of nutrients and functional foods integrating a Nutritional Support System (NSS) has shown greater efficiency in neurological stimulation than when nutrients are supplied separately. The most studied elements in the neurological response are glutamine, arginine, zinc, selenium, cholecalciferol, nicotinic acid, thiamine, pyridoxine, folate, cobalamin, Spirulina, omega-3 fatty acids, ascorbic acid, glycine, tryptophan, and probiotics. The NSS represents a therapeutic alternative that will restore neurological function in patients with spasticity and pyramidal pathway lesions, both characteristics of patients with CP.
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Affiliation(s)
- Fernando Leal-Martinez
- Centro de Investigación en Ciencias de la Salud (CICSA), FCS, Universidad Anáhuac México Campus Norte. Av. Universidad Anáhuac No. 46, Col. Lomas Anáhuac, Huixquilucan Edo. de México; CP 52786; México
| | - Guadalupe Jimenez Ramirez
- Centro de Investigación en Ciencias de la Salud (CICSA), FCS, Universidad Anáhuac México Campus Norte. Av. Universidad Anáhuac No. 46, Col. Lomas Anáhuac, Huixquilucan Edo. de México; CP 52786; México
| | - Antonio Ibarra
- Centro de Investigación en Ciencias de la Salud (CICSA), FCS, Universidad Anáhuac México Campus Norte. Av. Universidad Anáhuac No. 46, Col. Lomas Anáhuac, Huixquilucan Edo. de México; CP 52786; México
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Sun DS, Lien TS, Chang HH. Restraint stress-associated gastrointestinal injury and implications from the Evans blue-fed restraint stress mouse model. Tzu Chi Med J 2024; 36:23-29. [PMID: 38406572 PMCID: PMC10887336 DOI: 10.4103/tcmj.tcmj_101_23] [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: 04/26/2023] [Revised: 05/15/2023] [Accepted: 06/27/2023] [Indexed: 02/27/2024] Open
Abstract
The association between stress and gastrointestinal (GI) tract diseases is well established, while the exact mechanism remains elusive. As a result, it is urgent to establish mouse models to investigate restraint stress-associated GI leakage, but current models have their limitations. A new Evans blue-fed restraint mouse model has recently been developed that allows researchers to study restraint stress-associated GI leakage in live animals. This review article will focus on this model, including its mechanisms, clinical implications, and applications for studying restraint stress-associated GI injury. Recent findings from studies using this model will also be highlighted, along with their potential for diagnosis and treatment. The article aims to discuss about current research and provide recommendations for further study, ultimately improving our understanding of the link between stress and GI injury and improving patient outcomes.
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Affiliation(s)
- Der-Shan Sun
- Department of Molecular Biology and Human Genetics, Tzu Chi University, Hualien, Taiwan
| | - Te-Sheng Lien
- Department of Molecular Biology and Human Genetics, Tzu Chi University, Hualien, Taiwan
| | - Hsin-Hou Chang
- Department of Molecular Biology and Human Genetics, Tzu Chi University, Hualien, Taiwan
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Gupta S, Dinesh S, Sharma S. Bridging the Mind and Gut: Uncovering the Intricacies of Neurotransmitters, Neuropeptides, and their Influence on Neuropsychiatric Disorders. Cent Nerv Syst Agents Med Chem 2024; 24:2-21. [PMID: 38265387 DOI: 10.2174/0118715249271548231115071021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 08/31/2023] [Accepted: 10/04/2023] [Indexed: 01/25/2024]
Abstract
BACKGROUND The gut-brain axis (GBA) is a bidirectional signaling channel that facilitates communication between the gastrointestinal tract and the brain. Recent research on the gut-brain axis demonstrates that this connection enables the brain to influence gut function, which in turn influences the brain and its cognitive functioning. It is well established that malfunctioning of this axis adversely affects both systems' ability to operate effectively. OBJECTIVE Dysfunctions in the GBA have been associated with disorders of gut motility and permeability, intestinal inflammation, indigestion, constipation, diarrhea, IBS, and IBD, as well as neuropsychiatric and neurodegenerative disorders like depression, anxiety, schizophrenia, autism, Alzheimer's, and Parkinson's disease. Multiple research initiatives have shown that the gut microbiota, in particular, plays a crucial role in the GBA by participating in the regulation of a number of key neurochemicals that are known to have significant effects on the mental and physical well-being of an individual. METHODS Several studies have investigated the relationship between neuropsychiatric disorders and imbalances or disturbances in the metabolism of neurochemicals, often leading to concomitant gastrointestinal issues and modifications in gut flora composition. The interaction between neurological diseases and gut microbiota has been a focal point within this research. The novel therapeutic interventions in neuropsychiatric conditions involving interventions such as probiotics, prebiotics, and dietary modifications are outlined in this review. RESULTS The findings of multiple studies carried out on mice show that modulating and monitoring gut microbiota can help treat symptoms of such diseases, which raises the possibility of the use of probiotics, prebiotics, and even dietary changes as part of a new treatment strategy for neuropsychiatric disorders and their symptoms. CONCLUSION The bidirectional communication between the gut and the brain through the gut-brain axis has revealed profound implications for both gastrointestinal and neurological health. Malfunctions in this axis have been connected to a range of disorders affecting gut function as well as cognitive and neuropsychiatric well-being. The emerging understanding of the role of gut microbiota in regulating key neurochemicals opens up possibilities for novel treatment approaches for conditions like depression, anxiety, and neurodegenerative diseases.
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Affiliation(s)
- Saumya Gupta
- Department of Bioinformatics, BioNome, Bengaluru, India
| | - Susha Dinesh
- Department of Bioinformatics, BioNome, Bengaluru, India
| | - Sameer Sharma
- Department of Bioinformatics, BioNome, Bengaluru, India
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Wei D, Chen X, Xu J, Yin Y, Peng X, Li S, He W. Identification of disordered profiles of gut microbiota and functional component in stroke and poststroke epilepsy. Brain Behav 2023; 13:e3318. [PMID: 37984550 PMCID: PMC10726879 DOI: 10.1002/brb3.3318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 10/24/2023] [Accepted: 10/26/2023] [Indexed: 11/22/2023] Open
Abstract
AIMS It is estimated that 11.5% of patients with stroke (STR) were at risk of suffering poststroke epilepsy (PSE) within 5 years. Gut microbiota is shown to affect health in humans by producing metabolites. The association between dysregulation of gut microbiota and STR/PSE remains unclear. The aim of this study was to identify potential gut microbiota and functional component in STR and PSE, which may provide a theoretical foundation for diagnosis and treatment of STR and PSE. METHODS The fresh stool samples were collected from 19 healthy controls, 27 STR patients, and 20 PSE patients for 16S rRNA gene sequencing. Analysis of amplicon sequence variant and community diversity was performed, followed by the identification of dominant species, species differences analysis, diagnostic, and functional analysis of species in STR and PSE. RESULTS Community diversity was decreased in STR and PSE. Some disordered profiles of gut microbiota in STR and PSE were identified, such as the increase of Enterococcus and the decrease of butyricicoccus in STR, the increase of Escherichia Shigella and Clostridium innocuum-group and the decrease of Faecalibacterium in PSE, and the decrease of Anaerostipes in both STR and PSE. Moreover, potential diagnostic biomarkers for STR (butyricicoccus), PSE (Faecalibacterium), STR, and PSE (NK4A214_group and Veillonella) were identified. Several significantly dysfunctional components were identified, including l-tryptophan biosynthesis in STR, fatty acid biosynthesis in PSE, and Stress_Tolerant and anaerobic in both STR and PSE. CONCLUSION The disturbed gut microbiota and related dysfunctional components are closely associated with the progression of STR and PSE.
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Affiliation(s)
- Duncan Wei
- Department of PharmacyThe First Affiliated Hospital of Shantou University Medical CollegeShantouGuangdongP. R. China
| | - Xiaopu Chen
- Department of NeurologyThe First Affiliated Hospital of Shantou University Medical CollegeShantouGuangdongP. R. China
| | - Jing Xu
- Department of PharmacyThe First Affiliated Hospital of Shantou University Medical CollegeShantouGuangdongP. R. China
| | - Yongling Yin
- Department of NeurologyShantou University Medical CollegeShantouGuangdongP. R. China
| | - Xiaotang Peng
- Department of NeurologyShantou University Medical CollegeShantouGuangdongP. R. China
| | - Shunxian Li
- Department of NeurologyThe First Affiliated Hospital of Shantou University Medical CollegeShantouGuangdongP. R. China
| | - Wenzhen He
- Department of NeurologyThe First Affiliated Hospital of Shantou University Medical CollegeShantouGuangdongP. R. China
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Wang Y, Du W, Hu X, Yu X, Guo C, Jin X, Wang W. Targeting the blood-brain barrier to delay aging-accompanied neurological diseases by modulating gut microbiota, circadian rhythms, and their interplays. Acta Pharm Sin B 2023; 13:4667-4687. [PMID: 38045038 PMCID: PMC10692395 DOI: 10.1016/j.apsb.2023.08.009] [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: 05/12/2023] [Revised: 07/05/2023] [Accepted: 08/02/2023] [Indexed: 12/05/2023] Open
Abstract
The blood-brain barrier (BBB) impairment plays a crucial role in the pathological processes of aging-accompanied neurological diseases (AAND). Meanwhile, circadian rhythms disruption and gut microbiota dysbiosis are associated with increased morbidity of neurological diseases in the accelerated aging population. Importantly, circadian rhythms disruption and gut microbiota dysbiosis are also known to induce the generation of toxic metabolites and pro-inflammatory cytokines, resulting in disruption of BBB integrity. Collectively, this provides a new perspective for exploring the relationship among circadian rhythms, gut microbes, and the BBB in aging-accompanied neurological diseases. In this review, we focus on recent advances in the interplay between circadian rhythm disturbances and gut microbiota dysbiosis, and their potential roles in the BBB disruption that occurs in AAND. Based on existing literature, we discuss and propose potential mechanisms underlying BBB damage induced by dysregulated circadian rhythms and gut microbiota, which would serve as the basis for developing potential interventions to protect the BBB in the aging population through targeting the BBB by exploiting its links with gut microbiota and circadian rhythms for treating AAND.
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Affiliation(s)
- Yanping Wang
- Department of Neurology, the Second Affiliated Hospital of Jiaxing City, Jiaxing 314000, China
| | - Weihong Du
- Beijing Key Laboratory of Cancer Invasion and Metastasis Research, Department of Histology and Embryology, School of Basic Medical Sciences, Advanced Innovation Center for Human Brain Protection, Capital Medical University, Beijing 100069, China
| | - Xiaoyan Hu
- Beijing Key Laboratory of Cancer Invasion and Metastasis Research, Department of Histology and Embryology, School of Basic Medical Sciences, Advanced Innovation Center for Human Brain Protection, Capital Medical University, Beijing 100069, China
| | - Xin Yu
- Bengbu Medical College (Department of Neurology, the Second Hospital of Jiaxing City), Jiaxing 233030, China
| | - Chun Guo
- School of Biosciences, University of Sheffield, Sheffield S10 2TN, UK
| | - Xinchun Jin
- Beijing Key Laboratory of Cancer Invasion and Metastasis Research, Department of Histology and Embryology, School of Basic Medical Sciences, Advanced Innovation Center for Human Brain Protection, Capital Medical University, Beijing 100069, China
| | - Wei Wang
- Department of Physiology and Pathophysiology, Capital Medical University, Beijing 100069, China
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Kou J, Kang H, Hu L, Wang D, Wang S, Wang Q, Yang Z. Evaluation of improvement of cognitive impairment in older adults with probiotic supplementation: A systematic review and meta-analysis. Geriatr Nurs 2023; 54:155-162. [PMID: 37788563 DOI: 10.1016/j.gerinurse.2023.09.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Revised: 09/07/2023] [Accepted: 09/08/2023] [Indexed: 10/05/2023]
Abstract
OBJECTIVE This study aimed to evaluate the improvement of cognitive impairment in older adults through probiotic supplementation. METHODS A literature review on probiotic supplementation for treating cognitive impairment in older adults was conducted using English and Chinese databases from 1984 to 2023. Two researchers extracted relevant data independently, and a meta-analysis was performed with RevMan software. RESULTS A comprehensive analysis of ten pertinent papers was conducted, involving a sample of 702 old adults with cognitive impairment. The findings from this study revealed that probiotic supplementation exhibited a positive impact on cognitive symptoms, specifically memory (MD = 0.14, 95% CI :0.05~0.22, P = 0.001) and overall cognitive function (SMD = 0.73, 95% CI: 0.25~1.21, P=0.003), as well as oxidative stress levels, including total antioxidant capacity (MD=52.54, 95% CI:39.52~65.56, P < 0.01), malondialdehyde (MD=-0.11, 95% CI:-0.15~-0.07, P < 0.01), and glutathione (MD=17.08, 95% CI:8.65~25.5, P < 0.01). However, probiotic supplementation failed to enhance patients' psychological symptoms (SMD =0.18, 95% CI:-0.56~0.92, P = 0.64). CONCLUSIONS Probiotic supplementation can enhance cognitive symptoms and decrease oxidative stress in older adults with cognitive impairment. However, it does not improve psychological symptoms. More research is needed to determine the effects of probiotic supplementation on gastrointestinal symptoms and sleep quality in this population. Further supplementation and improvement will be necessary once high-quality literature becomes available.
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Affiliation(s)
- Jiaojiao Kou
- College of Nursing, Chengdu University of Traditional Chinese Medicine, No.1166 Liutai Road, Wenjiang District 611137, Chengdu, Sichuan 610041, China
| | - Hua Kang
- College of Nursing, Chengdu University of Traditional Chinese Medicine, No.1166 Liutai Road, Wenjiang District 611137, Chengdu, Sichuan 610041, China.
| | - Lizi Hu
- College of Nursing, Chengdu University of Traditional Chinese Medicine, No.1166 Liutai Road, Wenjiang District 611137, Chengdu, Sichuan 610041, China
| | - Dan Wang
- College of Nursing, Chengdu University of Traditional Chinese Medicine, No.1166 Liutai Road, Wenjiang District 611137, Chengdu, Sichuan 610041, China
| | - Shuyao Wang
- College of Nursing, Chengdu University of Traditional Chinese Medicine, No.1166 Liutai Road, Wenjiang District 611137, Chengdu, Sichuan 610041, China
| | - Qingyuan Wang
- College of Nursing, Chengdu University of Traditional Chinese Medicine, No.1166 Liutai Road, Wenjiang District 611137, Chengdu, Sichuan 610041, China
| | - Zijiang Yang
- College of Nursing, Chengdu University of Traditional Chinese Medicine, No.1166 Liutai Road, Wenjiang District 611137, Chengdu, Sichuan 610041, China
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Pan I, Issac PK, Rahman MM, Guru A, Arockiaraj J. Gut-Brain Axis a Key Player to Control Gut Dysbiosis in Neurological Diseases. Mol Neurobiol 2023:10.1007/s12035-023-03691-3. [PMID: 37851313 DOI: 10.1007/s12035-023-03691-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Accepted: 10/02/2023] [Indexed: 10/19/2023]
Abstract
Parkinson's disease is a chronic neuropathy characterised by the formation of Lewy bodies (misfolded alpha-synuclein) in dopaminergic neurons of the substantia nigra and other parts of the brain. Dopaminergic neurons play a vital role in generating both motor and non-motor symptoms. Finding therapeutic targets for Parkinson's disease (PD) is hindered due to an incomplete understanding of the disease's pathophysiology. Existing evidence suggests that the gut microbiota participates in the pathogenesis of PD via immunological, neuroendocrine, and direct neural mechanisms. Gut microbial dysbiosis triggers the loss of dopaminergic neurons via mitochondrial dysfunction. Gut dysbiosis triggers bacterial overgrowth in the small intestine, which increases the permeability barrier and induces systemic inflammation. It results in excessive stimulation of the innate immune system. In addition to that, activation of enteric neurons and enteric glial cells initiates the aggregation of alpha-synuclein. This alpha-synucleinopathy thus affects all levels of the brain-gut axis, including the central, autonomic, and enteric nervous systems. Though the neurobiological signaling cascade between the gut microbiome and the central nervous system is poorly understood, gut microbial metabolites may serve as a promising therapeutic strategy for PD. This article summarises all the known possible ways of bidirectional signal communication, i.e., the "gut-brain axis," where microbes from the middle gut interact with the brain and vice versa, and highlights a unique way to treat neurodegenerative diseases by maintaining homeostasis. The tenth cranial nerve (vagus nerve) plays a significant part in this signal communication. However, the leading regulatory factor for this axis is a diet that helps with microbial colonisation and brain function. Short-chain fatty acids (SCFAs), derived from microbially fermented dietary fibres, link host nutrition to maintain intestinal homeostasis. In addition to that, probiotics modulate cognitive function and the metabolic and behavioural conditions of the body. As technology advances, new techniques will emerge to study the tie-up between gut microbes and neuronal diseases.
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Affiliation(s)
- Ieshita Pan
- Institute of Biotechnology, Department of Medical Biotechnology and Integrative Physiology, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Thandalam, Chennai, Tamil Nadu, 602105, India.
| | - Praveen Kumar Issac
- Institute of Biotechnology, Department of Medical Biotechnology and Integrative Physiology, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Thandalam, Chennai, Tamil Nadu, 602105, India
| | - Md Mostafizur Rahman
- Laboratory of Environmental Health and Ecotoxicology, Department of Environmental Sciences, Jahangirnagar University, Dhaka, 1342, Bangladesh
| | - Ajay Guru
- Department of Cariology, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, India.
| | - Jesu Arockiaraj
- Toxicology and Pharmacology Laboratory, Department of Biotechnology, Faculty of Science and Humanities, SRM Institute of Science and Technology, Kattankulatur, Chengalpattu District, Tamil Nadu, 603203, India.
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22
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Zhao S, Jiang M, Qing H, Ni J. Cathepsins and SARS-CoV-2 infection: From pathogenic factors to potential therapeutic targets. Br J Pharmacol 2023; 180:2455-2481. [PMID: 37403614 DOI: 10.1111/bph.16187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 05/04/2023] [Accepted: 06/20/2023] [Indexed: 07/06/2023] Open
Abstract
Coronavirus disease-19 (COVID-19) is caused by severe acute respiratory syndrome-coronavirus-2 (SARS-CoV-2) infection. The COVID-19 pandemic began in March 2020 and has wrought havoc on health and economic systems worldwide. Efficacious treatment for COVID-19 is lacking: Only preventive measures as well as symptomatic and supportive care are available. Preclinical and clinical studies have indicated that lysosomal cathepsins might contribute to the pathogenesis and disease outcome of COVID-19. Here, we discuss cutting-edge evidence on the pathological roles of cathepsins in SARS-CoV-2 infection, host immune dysregulations, and the possible underlying mechanisms. Cathepsins are attractive drug targets because of their defined substrate-binding pockets, which can be exploited as binding sites for pharmaceutical enzyme inhibitors. Accordingly, the potential modulatory strategies of cathepsin activity are discussed. These insights could shed light on the development of cathepsin-based interventions for COVID-19.
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Affiliation(s)
- Shuxuan Zhao
- Key Laboratory of Molecular Medicine and Biotherapy, School of Life Science, Beijing Institute of Technology, Beijing, China
| | - Muzhou Jiang
- Department of Periodontics, Liaoning Provincial Key Laboratory of Oral Diseases, School and Hospital of Stomatology, China Medical University, Shenyang, China
| | - Hong Qing
- Key Laboratory of Molecular Medicine and Biotherapy, School of Life Science, Beijing Institute of Technology, Beijing, China
| | - Junjun Ni
- Key Laboratory of Molecular Medicine and Biotherapy, School of Life Science, Beijing Institute of Technology, Beijing, China
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23
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Ayan E, DeMirci H, Serdar MA, Palermo F, Baykal AT. Bridging the Gap between Gut Microbiota and Alzheimer's Disease: A Metaproteomic Approach for Biomarker Discovery in Transgenic Mice. Int J Mol Sci 2023; 24:12819. [PMID: 37629000 PMCID: PMC10454110 DOI: 10.3390/ijms241612819] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 07/24/2023] [Accepted: 07/28/2023] [Indexed: 08/27/2023] Open
Abstract
Alzheimer's Disease (AD) is a progressively debilitating form of dementia that affects millions of individuals worldwide. Although a vast amount of research has investigated the complex interplay between gut microbiota and neurodegeneration, the metaproteomic effects of microbiota on AD pathogenesis remain largely uncharted territory. This study aims to reveal the role of gut microbiota in AD pathogenesis, particularly regarding changes in the proteome and molecular pathways that are intricately linked to disease progression. We operated state-of-the-art Nano-Liquid Chromatography Mass Spectrometry (nLC-MS/MS) to compare the metaproteomic shifts of 3-month-old transgenic (3M-ALZ) and control (3M-ALM, Alzheimer's Littermate) mice, depicting the early onset of AD with those of 12-month-old ALZ and ALM mice displaying the late stage of AD. Combined with computational analysis, the outcomes of the gut-brain axis-focused inquiry furnish priceless knowledge regarding the intersection of gut microbiota and AD. Accordingly, our data indicate that the microbiota, proteome, and molecular changes in the intestine arise long before the manifestation of disease symptoms. Moreover, disparities exist between the normal-aged flora and the gut microbiota of late-stage AD mice, underscoring that the identified vital phyla, proteins, and pathways hold immense potential as markers for the early and late stages of AD. Our research endeavors to offer a comprehensive inquiry into the intricate interplay between gut microbiota and Alzheimer's Disease utilizing metaproteomic approaches, which have not been widely adopted in this domain. This highlights the exigency for further scientific exploration to elucidate the underlying mechanisms that govern this complex and multifaceted linkage.
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Affiliation(s)
- Esra Ayan
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, Acibadem Mehmet Ali Aydinlar University, Istanbul 34450, Turkey; (E.A.); (M.A.S.)
- Department of Molecular Biology and Genetics, Faculty of Science, Koç University, Istanbul 34450, Turkey;
| | - Hasan DeMirci
- Department of Molecular Biology and Genetics, Faculty of Science, Koç University, Istanbul 34450, Turkey;
- Koç University Isbank Center for Infectious Diseases (KUISCID), Koç University, Istanbul 34450, Turkey
- Stanford PULSE Institute, SLAC National Laboratory, Menlo Park, CA 94305, USA
| | - Muhittin Abdulkadir Serdar
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, Acibadem Mehmet Ali Aydinlar University, Istanbul 34450, Turkey; (E.A.); (M.A.S.)
| | | | - Ahmet Tarık Baykal
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, Acibadem Mehmet Ali Aydinlar University, Istanbul 34450, Turkey; (E.A.); (M.A.S.)
- Acıbadem Labmed Clinical Laboratories, R&D Center, İstanbul 34450, Turkey
- Department of Medical Biochemistry, Faculty of Medicine, Acibadem Mehmet Ali Aydınlar University, Istanbul 34450, Turkey
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24
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Zhu L, Wang Y, Pan CQ, Xing H. Gut microbiota in alcohol-related liver disease: pathophysiology and gut-brain cross talk. Front Pharmacol 2023; 14:1258062. [PMID: 37601074 PMCID: PMC10436520 DOI: 10.3389/fphar.2023.1258062] [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: 07/13/2023] [Accepted: 07/27/2023] [Indexed: 08/22/2023] Open
Abstract
Alcohol-related liver disease (ALD) from excessive alcohol intake has a unique gut microbiota profile. The disease progression-free survival in ALD patients has been associated with the degree of gut dysbiosis. The vicious cycles between gut dysbiosis and the disease progression in ALD including: an increase of acetaldehyde production and bile acid secretion, impaired gut barrier, enrichment of circulating microbiota, toxicities of microbiota metabolites, a cascade of pro-inflammatory chemokines or cytokines, and augmentation in the generation of reactive oxygen species. The aforementioned pathophysiology process plays an important role in different disease stages with a spectrum of alcohol hepatitis, ALD cirrhosis, neurological dysfunction, and hepatocellular carcinoma. This review aims to illustrate the pathophysiology of gut microbiota and clarify the gut-brain crosstalk in ALD, which may provide the opportunity of identifying target points for future therapeutic intervention in ALD.
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Affiliation(s)
- Lin Zhu
- Center of Liver Diseases Division 3, Beijing Ditan Hospital, Capital Medical University, Beijing, China
| | - Yixuan Wang
- Division of Gastroenterology and Hepatology, BaoJi Central Hospital, Shaanxi, China
| | - Calvin Q. Pan
- Center of Liver Diseases Division 3, Beijing Ditan Hospital, Capital Medical University, Beijing, China
- Division of Gastroenterology and Hepatology, NYU Langone Health, New York University School of Medicine, New York, NY, United States
| | - Huichun Xing
- Center of Liver Diseases Division 3, Beijing Ditan Hospital, Capital Medical University, Beijing, China
- Center of Liver Diseases, Peking University Ditan Teaching Hospital, Beijing, China
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25
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Jin Y, Chen J, Chai Q, Zhu J, Jin X. Exploration of acupuncture therapy in the treatment of MCI patients with the ApoE ε4 gene based on the brain-gut axis theory. BMC Complement Med Ther 2023; 23:227. [PMID: 37422636 DOI: 10.1186/s12906-023-04060-2] [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: 04/25/2023] [Accepted: 06/28/2023] [Indexed: 07/10/2023] Open
Abstract
BACKGROUND Mild cognitive impairment (MCI) is the predementia phase of Alzheimer's disease (AD). The intestinal microbiome is altered in MCI and AD, and apolipoprotein E (ApoE) ε4 gene polymorphism is a risk factor for the progression of MCI to AD. This study aims to investigate the improvement in cognitive function of MCI patients with and without ApoE ε4 due to acupuncture and the changes in gut microbiota community composition and abundance in MCI. METHODS This randomized assessor-blind controlled study will enrol MCI patients with and without the ApoE ε4 gene (n = 60/60). Sixty subjects with the ApoE ε4 gene and 60 subjects without the ApoE ε4 gene will be randomly allocated into treatment and control groups in a 1:1 ratio. Intestinal microbiome profiles will be evaluated by 16 S rRNA sequencing of faecal samples and compared between the groups. RESULTS/CONCLUSIONS Acupuncture is an effective method to improve cognitive function in MCI. This study will provide data on the relationship between the gut microbiota and the effectiveness of acupuncture in patients with MCI from a new angle. This study will also provide data on the relationship between the gut microbiota and an AD susceptibility gene by integrating microbiologic and molecular approaches. TRIAL REGISTRATION www.chictr.org.cn , ID: ChiCTR2100043017, recorded on 4 February 2021.
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Affiliation(s)
- Yuanyuan Jin
- Department of Acupuncture and Moxibustion, Zhejiang Hospital, No. 1229 Gudun Road, Xihu District, Hangzhou, China.
| | - Jin Chen
- Department of General Medicine, Zhejiang Hospital, No. 1229 Gudun Road, Xihu District, Hangzhou, China
| | - Qichen Chai
- Department of General Medicine, Zhejiang Hospital, No. 1229 Gudun Road, Xihu District, Hangzhou, China
| | - Jianfang Zhu
- Department of Acupuncture and Moxibustion, Zhejiang Hospital, No. 1229 Gudun Road, Xihu District, Hangzhou, China
| | - Xiaoqing Jin
- Department of Acupuncture and Moxibustion, Zhejiang Hospital, No. 1229 Gudun Road, Xihu District, Hangzhou, China.
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26
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Siwakoti B, Lien TS, Lin YY, Pethaperumal S, Hung SC, Sun DS, Cheng CF, Chang HH. The Role of Activating Transcription Factor 3 in Metformin's Alleviation of Gastrointestinal Injury Induced by Restraint Stress in Mice. Int J Mol Sci 2023; 24:10995. [PMID: 37446172 DOI: 10.3390/ijms241310995] [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: 05/29/2023] [Revised: 06/29/2023] [Accepted: 06/29/2023] [Indexed: 07/15/2023] Open
Abstract
Metformin is one of the most commonly used drugs for type 2 diabetes mellitus. In addition to its anti-diabetic property, evidence suggests more potential applications for metformin, such as antiaging, cellular protection, and anti-inflammation. Studies have reported that metformin activates pathways with anti-inflammatory effects, enhances the integrity of gut epithelial tight junctions, and promotes a healthy gut microbiome. These actions contribute to the protective effect of metformin against gastrointestinal (GI) tract injury. However, whether metformin plays a protective role in psychological-stress-associated GI tract injury remains elusive. We aim to elucidate the potential protective effect of metformin on the GI system and develop an effective intervention strategy to counteract GI injury induced by acute psychological stress. By monitoring the levels of GI-nonabsorbable Evans blue dye in the bloodstream, we assessed the progression of GI injury in live mice. Our findings demonstrate that the administration of metformin effectively mitigated GI leakage caused by psychological stress. The GI protective effect of metformin is more potent when used on wild-type mice than on activating-transcription-factor 3 (ATF3)-deficient (ATF3-/-) mice. As such, metformin-mediated rescue was conducted in an ATF3-dependent manner. In addition, metformin-mediated protection is associated with the induction of stress-induced GI mRNA expressions of the stress-induced genes ATF3 and AMP-activated protein kinase. Furthermore, metformin treatment-mediated protection of CD326+ GI epithelial cells against stress-induced apoptotic cell death was observed in wild-type but not in ATF3-/- mice. These results suggest that metformin plays a protective role in stress-induced GI injury and that ATF3 is an essential regulator for metformin-mediated rescue of stress-induced GI tract injury.
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Affiliation(s)
- Bijaya Siwakoti
- Department of Molecular Biology and Human Genetics, Tzu-Chi University, Hualien 97004, Taiwan
| | - Te-Sheng Lien
- Department of Molecular Biology and Human Genetics, Tzu-Chi University, Hualien 97004, Taiwan
| | - You-Yen Lin
- Department of Molecular Biology and Human Genetics, Tzu-Chi University, Hualien 97004, Taiwan
| | - Subhashree Pethaperumal
- Department of Molecular Biology and Human Genetics, Tzu-Chi University, Hualien 97004, Taiwan
| | - Shih-Che Hung
- Institute of Medical Sciences, Tzu-Chi University, Hualien 97004, Taiwan
| | - Der-Shan Sun
- Department of Molecular Biology and Human Genetics, Tzu-Chi University, Hualien 97004, Taiwan
- Institute of Medical Sciences, Tzu-Chi University, Hualien 97004, Taiwan
| | - Ching-Feng Cheng
- Department of Pediatrics, Taipei Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Taipei 23142, Taiwan
- Institute of Biomedical Sciences, Academia Sinica, Taipei 11529, Taiwan
| | - Hsin-Hou Chang
- Department of Molecular Biology and Human Genetics, Tzu-Chi University, Hualien 97004, Taiwan
- Institute of Medical Sciences, Tzu-Chi University, Hualien 97004, Taiwan
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27
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Versace S, Pellitteri G, Sperotto R, Tartaglia S, Da Porto A, Catena C, Gigli GL, Cavarape A, Valente M. A State-of-Art Review of the Vicious Circle of Sleep Disorders, Diabetes and Neurodegeneration Involving Metabolism and Microbiota Alterations. Int J Mol Sci 2023; 24:10615. [PMID: 37445790 DOI: 10.3390/ijms241310615] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2023] [Revised: 06/15/2023] [Accepted: 06/22/2023] [Indexed: 07/15/2023] Open
Abstract
In the context of neurodegenerative disorders, cognitive decline is frequently reported in older population. Recently, numerous metabolic pathways have been implicated in neurodegeneration, including signaling disruption of insulin and other glucose-regulating hormones. In fact, Alzheimer's disease has now been considered as "type-3 diabetes". In this review, we tried to clarify the role of sleep impairment as the third major player in the complex relationship between metabolic and neurodegenerative diseases. Altered sleep may trigger or perpetuate these vicious mechanisms, leading to the development of both dementia and type 2 diabetes mellitus. Finally, we analyzed these reciprocal interactions considering the emerging role of the gut microbiota in modulating the same processes. Conditions of dysbiosis have been linked to circadian rhythm disruption, metabolic alterations, and release of neurotoxic products, all contributing to neurodegeneration. In a future prospective, gut microbiota could provide a major contribution in explaining the tangled relationship between sleep disorders, dementia and diabetes.
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Affiliation(s)
- Salvatore Versace
- Clinical Neurology, Udine University Hospital, Piazza Santa Maria della Misericordia, 15, 33100 Udine, Italy
- Department of Medicine (DAME), University of Udine, 33100 Udine, Italy
| | - Gaia Pellitteri
- Clinical Neurology, Udine University Hospital, Piazza Santa Maria della Misericordia, 15, 33100 Udine, Italy
| | - Roberto Sperotto
- Clinical Neurology, Udine University Hospital, Piazza Santa Maria della Misericordia, 15, 33100 Udine, Italy
- Department of Medicine (DAME), University of Udine, 33100 Udine, Italy
| | - Sara Tartaglia
- Clinical Neurology, Udine University Hospital, Piazza Santa Maria della Misericordia, 15, 33100 Udine, Italy
- Department of Medicine (DAME), University of Udine, 33100 Udine, Italy
| | - Andrea Da Porto
- Department of Medicine (DAME), University of Udine, 33100 Udine, Italy
- Internal Medicine, Udine University Hospital, 33100 Udine, Italy
| | - Cristiana Catena
- Department of Medicine (DAME), University of Udine, 33100 Udine, Italy
- Internal Medicine, Udine University Hospital, 33100 Udine, Italy
| | - Gian Luigi Gigli
- Department of Medicine (DAME), University of Udine, 33100 Udine, Italy
| | - Alessandro Cavarape
- Department of Medicine (DAME), University of Udine, 33100 Udine, Italy
- Internal Medicine, Udine University Hospital, 33100 Udine, Italy
| | - Mariarosaria Valente
- Clinical Neurology, Udine University Hospital, Piazza Santa Maria della Misericordia, 15, 33100 Udine, Italy
- Department of Medicine (DAME), University of Udine, 33100 Udine, Italy
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28
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Chu Z, Han S, Luo Y, Zhou Y, Zhu L, Luo F. Targeting gut-brain axis by dietary flavonoids ameliorate aging-related cognition decline: Evidences and mechanisms. Crit Rev Food Sci Nutr 2023:1-22. [PMID: 37300491 DOI: 10.1080/10408398.2023.2222404] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Aging-related cognitive impairment, mainly Alzheimer's disease (AD), has been widely studied. However, effective prevention and treatment methods are still lacking. In recent years, researchers have observed beneficial effects of plant-based supplements, such as flavonoids, on cognitive protection. This provides a new clue for the prevention of cognitive dysfunction. Studies have shown that dietary flavonoids have neuroprotective effects, but the mechanism is not clear. In this review, we systematically reviewed the research progress on the effects of dietary flavonoids on gut microbes and their metabolites, and concluded that flavonoids could improve cognitive function through the gut-brain axis. Flavonoids can be absorbed through the intestine, cross the blood-brain barrier, and enter the brain tissue. Flavonoids can inhibit the expression and secretion of inflammatory factors in brain tissue, reduce the damage caused by oxidative stress, clear neural damage proteins and inhibit neuronal apoptosis, thereby ameliorating age-related cognitive disorders. Future work will continue to explore the gut-brain axis and target genes regulated by flavonoids. In addition, clinical research and its mechanisms need to be further explored to provide solutions or advise for patients with cognitive impairment.
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Affiliation(s)
- Zhongxing Chu
- Hunan Key Laboratory of Grain-oil Deep Process and Quality Control, Hunan Key Laboratory of Forestry Edible Resources Safety and Processing, Central South University of Forestry and Technology, Changsha, Hunan, China
| | - Shuai Han
- Hunan Key Laboratory of Grain-oil Deep Process and Quality Control, Hunan Key Laboratory of Forestry Edible Resources Safety and Processing, Central South University of Forestry and Technology, Changsha, Hunan, China
| | - Yi Luo
- Department of Clinic Medicine, Xiangya School of Medicine, Central South University, Changsha, Hunan, China
| | - Yaping Zhou
- Hunan Key Laboratory of Grain-oil Deep Process and Quality Control, Hunan Key Laboratory of Forestry Edible Resources Safety and Processing, Central South University of Forestry and Technology, Changsha, Hunan, China
| | - Lingfeng Zhu
- Hunan Key Laboratory of Grain-oil Deep Process and Quality Control, Hunan Key Laboratory of Forestry Edible Resources Safety and Processing, Central South University of Forestry and Technology, Changsha, Hunan, China
| | - Feijun Luo
- Hunan Key Laboratory of Grain-oil Deep Process and Quality Control, Hunan Key Laboratory of Forestry Edible Resources Safety and Processing, Central South University of Forestry and Technology, Changsha, Hunan, China
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Li Z, Jiang Y, Long C, Peng Q, Yue R. The gut microbiota-astrocyte axis: Implications for type 2 diabetic cognitive dysfunction. CNS Neurosci Ther 2023; 29 Suppl 1:59-73. [PMID: 36601656 PMCID: PMC10314112 DOI: 10.1111/cns.14077] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 11/20/2022] [Accepted: 12/18/2022] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND Diabetic cognitive dysfunction (DCD) is one of the most insidious complications of type 2 diabetes mellitus, which can seriously affect the ability to self-monitoring of blood glucose and the quality of life in the elderly. Previous pathological studies of cognitive dysfunction have focused on neuronal dysfunction, characterized by extracellular beta-amyloid deposition and intracellular tau hyperphosphorylation. In recent years, astrocytes have been recognized as a potential therapeutic target for cognitive dysfunction and important participants in the central control of metabolism. The disorder of gut microbiota and their metabolites have been linked to a series of metabolic diseases such as diabetes mellitus. The imbalance of intestinal flora has the effect of promoting the occurrence and deterioration of several diabetes-related complications. Gut microbes and their metabolites can drive astrocyte activation. AIMS We reviewed the pathological progress of DCD related to the "gut microbiota-astrocyte" axis in terms of peripheral and central inflammation, intestinal and blood-brain barrier (BBB) dysfunction, systemic and brain energy metabolism disorders to deepen the pathological research progress of DCD and explore the potential therapeutic targets. CONCLUSION "Gut microbiota-astrocyte" axis, unique bidirectional crosstalk in the brain-gut axis, mediates the intermediate pathological process of neurocognitive dysfunction secondary to metabolic disorders in diabetes mellitus.
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Affiliation(s)
- Zi‐Han Li
- Hospital of Chengdu University of Traditional Chinese MedicineChengduChina
| | - Ya‐Yi Jiang
- Hospital of Chengdu University of Traditional Chinese MedicineChengduChina
| | - Cai‐Yi Long
- Hospital of Chengdu University of Traditional Chinese MedicineChengduChina
| | - Qian Peng
- Hospital of Chengdu University of Traditional Chinese MedicineChengduChina
| | - Ren‐Song Yue
- Hospital of Chengdu University of Traditional Chinese MedicineChengduChina
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30
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Zou B, Li J, Ma RX, Cheng XY, Ma RY, Zhou TY, Wu ZQ, Yao Y, Li J. Gut Microbiota is an Impact Factor based on the Brain-Gut Axis to Alzheimer's Disease: A Systematic Review. Aging Dis 2023; 14:964-1678. [PMID: 37191418 DOI: 10.14336/ad.2022.1127] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Accepted: 11/27/2022] [Indexed: 05/17/2023] Open
Abstract
Alzheimer's disease (AD) is a degenerative disease of the central nervous system. The pathogenesis of AD has been explained using cholinergic, β-amyloid toxicity, tau protein hyperphosphorylation, and oxidative stress theories. However, an effective treatment method has not been developed. In recent years, with the discovery of the brain-gut axis (BGA) and breakthroughs made in Parkinson's disease, depression, autism, and other diseases, BGA has become a hotspot in AD research. Several studies have shown that gut microbiota can affect the brain and behavior of patients with AD, especially their cognitive function. Animal models, fecal microbiota transplantation, and probiotic intervention also provide evidence regarding the correlation between gut microbiota and AD. This article discusses the relationship and related mechanisms between gut microbiota and AD based on BGA to provide possible strategies for preventing or alleviating AD symptoms by regulating gut microbiota.
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Affiliation(s)
- Bin Zou
- School of Pharmacy, Ningxia Medical University, Yinchuan 750004, China
| | - Jia Li
- School of Pharmacy, Ningxia Medical University, Yinchuan 750004, China
| | - Rui-Xia Ma
- School of Pharmacy, Ningxia Medical University, Yinchuan 750004, China
| | - Xiao-Yu Cheng
- Department of Neurology and Clinical Research Center of Neurological Disease, The Second Affiliated Hospital of Soochow University, Suzhou 215004, China
| | - Rui-Yin Ma
- School of Pharmacy, Ningxia Medical University, Yinchuan 750004, China
| | - Ting-Yuan Zhou
- School of Pharmacy, Ningxia Medical University, Yinchuan 750004, China
| | - Zi-Qi Wu
- School of Pharmacy, Ningxia Medical University, Yinchuan 750004, China
| | - Yao Yao
- School of Basic Medical Sciences, Ningxia Medical University, Yinchuan 750004, China
| | - Juan Li
- School of Pharmacy, Ningxia Medical University, Yinchuan 750004, China
- Ningxia Engineering and Technology Research Center for Modernization of Characteristic Chinese Medicine, and Key Laboratory of Ningxia Ethnomedicine Modernization, Ministry of Education, Ningxia Medical University, Yinchuan 750004, China
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31
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Fan KC, Lin CC, Liu YC, Chao YP, Lai YJ, Chiu YL, Chuang YF. Altered gut microbiota in older adults with mild cognitive impairment: a case-control study. Front Aging Neurosci 2023; 15:1162057. [PMID: 37346147 PMCID: PMC10281289 DOI: 10.3389/fnagi.2023.1162057] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Accepted: 05/02/2023] [Indexed: 06/23/2023] Open
Abstract
Introduction The microbiota-gut-brain axis is implicated in Alzheimer's disease. Gut microbiota alterations in mild cognitive impairment (MCI) are inconsistent and remain to be understood. This study aims to investigate the gut microbial composition associated with MCI, cognitive functions, and structural brain differences. Methods A nested case-control study was conducted in a community-based prospective cohort where detailed cognitive functions and structural brain images were collected. Thirty-one individuals with MCI were matched to sixty-five cognitively normal controls by age strata, gender, and urban/rural area. Fecal samples were examined using 16S ribosomal RNA (rRNA) V3-V4 sequencing. Compositional differences between the two groups were identified and correlated with the cognitive functions and volumes/thickness of brain structures. Results There was no significant difference in alpha and beta diversity between MCIs and cognitively normal older adults. However, the abundance of the genus Ruminococcus, Butyricimonas, and Oxalobacter decreased in MCI patients, while an increased abundance of nine other genera, such as Flavonifractor, were found in MCIs. Altered genera discriminated MCI patients well from controls (AUC = 84.0%) and were associated with attention and executive function. Conclusion This study provides insights into the role of gut microbiota in the neurodegenerative process.
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Affiliation(s)
- Kang-Chen Fan
- School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Chen-Ching Lin
- Institute of Biomedical Informatics, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Yi-Chien Liu
- Department of Neurology, Cardinal Tien Hospital, New Taipei, Taiwan
| | - Yi-Ping Chao
- Department of Computer Science and Information Engineering, Chang Gung University, Taoyuan, Taiwan
- Department of Otolaryngology-Head and Neck Surgery, Chang Gung Memorial Hospital at Linkou, Taoyuan, Taiwan
| | - Yen-Jun Lai
- Division of Medical Imaging, Department of Radiology, Far Eastern Memorial Hospital, New Taipei, Taiwan
| | - Yen-Ling Chiu
- Department of Medical Research, Far Eastern Memorial Hospital, Taipei, Taiwan
- Graduate Program in Biomedical Informatics and Graduate Institute of Medicine, Yuan Ze University, Taoyuan, Taiwan
- Graduate Institute of Clinical Medicine, National Taiwan University, Taipei, Taiwan
| | - Yi-Fang Chuang
- School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan
- Institute of Public Health, National Yang Ming Chiao Tung University, Taipei, Taiwan
- Department of Psychiatry, Far Eastern Memorial Hospital, New Taipei, Taiwan
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Kaur N, LaForce G, Mallela DP, Saha PP, Buffa J, Li XS, Sangwan N, Rothenberg K, Zhu W. Exploratory Transcriptomic Profiling Reveals the Role of Gut Microbiota in Vascular Dementia. Int J Mol Sci 2023; 24:ijms24098091. [PMID: 37175797 PMCID: PMC10178712 DOI: 10.3390/ijms24098091] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 04/27/2023] [Accepted: 04/28/2023] [Indexed: 05/15/2023] Open
Abstract
Stroke is the second most common cause of cognitive impairment and dementia. Vascular dementia (VaD), a cognitive impairment following a stroke, is common and significantly impacts the quality of life. We recently demonstrated via gut microbe transplant studies that the gut microbe-dependent trimethylamine-N-oxide (TMAO) pathway impacts stroke severity, both infarct size and long-term cognitive outcomes. However, the molecular mechanisms that underly the role of the microbiome in VaD have not been explored in depth. To address this issue, we performed a comprehensive RNA-sequencing analysis to identify differentially expressed (DE) genes in the ischemic cerebral cortex of mouse brains at pre-stroke and post-stroke day 1 and day 3. A total of 4016, 3752 and 7861 DE genes were identified at pre-stroke and post-stroke day 1 and day 3, respectively. The Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analysis indicated pathways of neurodegeneration in multiple diseases, chemokine signaling, calcium signaling, and IL-17 signaling as the key enriched pathways. Inflammatory response genes interleukin-1 beta (Il-1β), chemokines (C-X-C motif chemokine ligand 10 (Cxcl10), chemokine ligand 2 (Ccl2)), and immune system genes (S100 calcium binding protein 8 (S100a8), lipocalin-2 (Lcn2)) were among the most significantly upregulated genes. Hypocretin neuropeptide precursor (Hcrt), a neuropeptide, and transcription factors such as neuronal PAS domain protein 4 (Npas4), GATA binding protein 3 (Gata3), and paired box 7 (Pax7) were among the most significantly downregulated genes. In conclusion, our results indicate that higher plasma TMAO levels induce differential mRNA expression profiles in the ischemic brain tissue in our pre-clinical stroke model, and the predicted pathways provide the molecular basis for regulating the TMAO-enhanced neuroinflammatory response in the brain.
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Affiliation(s)
- Navdeep Kaur
- Department of Cardiovascular & Metabolic Sciences, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Geneva LaForce
- Department of Cardiovascular & Metabolic Sciences, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Deepthi P Mallela
- Department of Cardiovascular & Metabolic Sciences, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Prasenjit Prasad Saha
- Department of Cardiovascular & Metabolic Sciences, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Jennifer Buffa
- Department of Cardiovascular & Metabolic Sciences, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Xinmin S Li
- Department of Cardiovascular & Metabolic Sciences, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Naseer Sangwan
- Department of Cardiovascular & Metabolic Sciences, Cleveland Clinic, Cleveland, OH 44195, USA
- Microbial Sequencing & Analytics Resource (MSAAR) Facility, Shared Laboratory Resources (SLR), Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Kasia Rothenberg
- Cleveland Clinic Lou Ruvo Center for Brain Health, Cleveland, OH 44195, USA
| | - Weifei Zhu
- Department of Cardiovascular & Metabolic Sciences, Cleveland Clinic, Cleveland, OH 44195, USA
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Casanova A, Wevers A, Navarro-Ledesma S, Pruimboom L. Mitochondria: It is all about energy. Front Physiol 2023; 14:1114231. [PMID: 37179826 PMCID: PMC10167337 DOI: 10.3389/fphys.2023.1114231] [Citation(s) in RCA: 30] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Accepted: 03/29/2023] [Indexed: 05/15/2023] Open
Abstract
Mitochondria play a key role in both health and disease. Their function is not limited to energy production but serves multiple mechanisms varying from iron and calcium homeostasis to the production of hormones and neurotransmitters, such as melatonin. They enable and influence communication at all physical levels through interaction with other organelles, the nucleus, and the outside environment. The literature suggests crosstalk mechanisms between mitochondria and circadian clocks, the gut microbiota, and the immune system. They might even be the hub supporting and integrating activity across all these domains. Hence, they might be the (missing) link in both health and disease. Mitochondrial dysfunction is related to metabolic syndrome, neuronal diseases, cancer, cardiovascular and infectious diseases, and inflammatory disorders. In this regard, diseases such as cancer, Alzheimer's, Parkinson's, amyotrophic lateral sclerosis (ALS), chronic fatigue syndrome (CFS), and chronic pain are discussed. This review focuses on understanding the mitochondrial mechanisms of action that allow for the maintenance of mitochondrial health and the pathways toward dysregulated mechanisms. Although mitochondria have allowed us to adapt to changes over the course of evolution, in turn, evolution has shaped mitochondria. Each evolution-based intervention influences mitochondria in its own way. The use of physiological stress triggers tolerance to the stressor, achieving adaptability and resistance. This review describes strategies that could recover mitochondrial functioning in multiple diseases, providing a comprehensive, root-cause-focused, integrative approach to recovering health and treating people suffering from chronic diseases.
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Affiliation(s)
- Amaloha Casanova
- Department of Physiotherapy, University of Granada, Granada, Spain
- Faculty of Health Sciences, Melilla, Spain
- PNI Europe, The Hague, Netherlands
- Chair of Clinical Psychoneuroimmunology, University of Granada and PNI Europe, Granada, Spain
| | - Anne Wevers
- Department of Physiotherapy, University of Granada, Granada, Spain
- Faculty of Health Sciences, Melilla, Spain
- PNI Europe, The Hague, Netherlands
- Chair of Clinical Psychoneuroimmunology, University of Granada and PNI Europe, Granada, Spain
| | - Santiago Navarro-Ledesma
- Department of Physiotherapy, University of Granada, Granada, Spain
- Faculty of Health Sciences, Melilla, Spain
- PNI Europe, The Hague, Netherlands
- Chair of Clinical Psychoneuroimmunology, University of Granada and PNI Europe, Granada, Spain
| | - Leo Pruimboom
- PNI Europe, The Hague, Netherlands
- Chair of Clinical Psychoneuroimmunology, University of Granada and PNI Europe, Granada, Spain
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Ojha S, Patil N, Jain M, Kole C, Kaushik P. Probiotics for Neurodegenerative Diseases: A Systemic Review. Microorganisms 2023; 11:microorganisms11041083. [PMID: 37110506 PMCID: PMC10140855 DOI: 10.3390/microorganisms11041083] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 04/12/2023] [Accepted: 04/18/2023] [Indexed: 04/29/2023] Open
Abstract
Neurodegenerative disorders (ND) are a group of conditions that affect the neurons in the brain and spinal cord, leading to their degeneration and eventually causing the loss of function in the affected areas. These disorders can be caused by a range of factors, including genetics, environmental factors, and lifestyle choices. Major pathological signs of these diseases are protein misfolding, proteosomal dysfunction, aggregation, inadequate degradation, oxidative stress, free radical formation, mitochondrial dysfunctions, impaired bioenergetics, DNA damage, fragmentation of Golgi apparatus neurons, disruption of axonal transport, dysfunction of neurotrophins (NTFs), neuroinflammatory or neuroimmune processes, and neurohumoral symptoms. According to recent studies, defects or imbalances in gut microbiota can directly lead to neurological disorders through the gut-brain axis. Probiotics in ND are recommended to prevent cognitive dysfunction, which is a major symptom of these diseases. Many in vivo and clinical trials have revealed that probiotics (Lactobacillus acidophilus, Bifidobacterium bifidum, and Lactobacillus casei, etc.) are effective candidates against the progression of ND. It has been proven that the inflammatory process and oxidative stress can be modulated by modifying the gut microbiota with the help of probiotics. As a result, this study provides an overview of the available data, bacterial variety, gut-brain axis defects, and probiotics' mode of action in averting ND. A literature search on particular sites, including PubMed, Nature, and Springer Link, has identified articles that might be pertinent to this subject. The search contains the following few groups of terms: (1) Neurodegenerative disorders and Probiotics OR (2) Probiotics and Neurodegenerative disorders. The outcomes of this study aid in elucidating the relationship between the effects of probiotics on different neurodegenerative disorders. This systematic review will assist in discovering new treatments in the future, as probiotics are generally safe and cause mild side effects in some cases in the human body.
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Affiliation(s)
- Sandhya Ojha
- Cell & Developmental Biology Laboratory, Centre of Research for Development, Parul University, Vadodara 391760, India
- Department of Life Sciences, Parul Institute of Applied Sciences, Parul University, Vadodara 391760, India
| | - Nil Patil
- Cell & Developmental Biology Laboratory, Centre of Research for Development, Parul University, Vadodara 391760, India
- Department of Life Sciences, Parul Institute of Applied Sciences, Parul University, Vadodara 391760, India
| | - Mukul Jain
- Cell & Developmental Biology Laboratory, Centre of Research for Development, Parul University, Vadodara 391760, India
- Department of Life Sciences, Parul Institute of Applied Sciences, Parul University, Vadodara 391760, India
| | | | - Prashant Kaushik
- Instituto de Conservacióny Mejora de la Agrodiversidad Valenciana, Universitat Politècnica de València, 46022 Valencia, Spain
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Yang Z, Wei C, Li X, Yuan J, Gao X, Li B, Zhao Z, Toh S, Yu X, Brayne C, Yang Z, Sha F, Tang J. Association Between Regular Laxative Use and Incident Dementia in UK Biobank Participants. Neurology 2023; 100:e1702-e1711. [PMID: 36813729 PMCID: PMC10115504 DOI: 10.1212/wnl.0000000000207081] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Accepted: 01/06/2023] [Indexed: 02/24/2023] Open
Abstract
BACKGROUND AND OBJECTIVES The use of over-the-counter laxatives is common in the general population. The microbiome-gut-brain axis hypothesis suggests that the use of laxatives could be associated with dementia. We aimed to examine the association between the regular use of laxatives and the incidence of dementia in UK Biobank participants. METHODS This prospective cohort study was based on UK Biobank participants aged 40-69 years without a history of dementia. Regular use of laxatives was defined as self-reported use in most days of the week for the last 4 weeks at baseline (2006-2010). The outcomes were all-cause dementia, Alzheimer disease (AD), and vascular dementia (VD), identified from linked hospital admissions or death registers (up to 2019). Sociodemographic characteristics, lifestyle factors, medical conditions, family history, and regular medication use were adjusted for in the multivariable Cox regression analyses. RESULTS Among the 502,229 participants with a mean age of 56.5 (SD 8.1) years at baseline, 273,251 (54.4%) were female, and 18,235 (3.6%) reported regular use of laxatives. Over a mean follow-up of 9.8 years, 218 (1.3%) participants with regular use of laxatives and 1,969 (0.4%) with no regular use developed all-cause dementia. Multivariable analyses showed that regular use of laxatives was associated with increased risk of all-cause dementia (hazard ratio [HR] 1.51; 95% CI 1.30-1.75) and VD (HR 1.65; 95% CI 1.21-2.27), with no significant association observed for AD (HR 1.05; 95% CI 0.79-1.40). The risk of both all-cause dementia and VD increased with the number of regularly used laxative types (p trend 0.001 and 0.04, respectively). Among the participants who clearly reported that they were using just 1 type of laxative (n = 5,800), only those using osmotic laxatives showed a statistically significantly higher risk of all-cause dementia (HR 1.64; 95% CI 1.20-2.24) and VD (HR 1.97; 95% CI 1.04-3.75). These results remained robust in various subgroup and sensitivity analyses. DISCUSSION Regular use of laxatives was associated with a higher risk of all-cause dementia, particularly in those who used multiple laxative types or osmotic laxative.
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Affiliation(s)
- Zhirong Yang
- From the Shenzhen Institute of Advanced Technology (Zhirong Yang, C.W., Z.Z., F.S., J.T.), Chinese Academy of Sciences, Guangdong, China; Primary Care Unit (Zhirong Yang), School of Clinical Medicine, University of Cambridge, United Kingdom; Department of Population Medicine (X.L., S.T.), Harvard Medical School & Harvard Pilgrim Health Care Institute, Boston, MA; Center for Digestive Disease (J.Y.), The Seventh Affiliated Hospital, Sun Yat-sen University; Central Laboratory (X.G.), Shenzhen Key Laboratory of Precision Medicine for Hematological Malignancies, Shenzhen University General Hospital; School of Government (B.L.), Shenzhen University, Guangdong; Peking University Sixth Hospital (X.Y.), Peking University Institute of Mental Health, Beijing, China; Cambridge Public Health (C.B.), School of Clinical Medicine, University of Cambridge, United Kingdom; Division of Epidemiology (Zuyao Yang, J.T.), The JC School of Public Health & Primary Care, The Chinese University of Hong Kong; and Clinical Data Center (J.T.), Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangdong, China.
| | - Chang Wei
- From the Shenzhen Institute of Advanced Technology (Zhirong Yang, C.W., Z.Z., F.S., J.T.), Chinese Academy of Sciences, Guangdong, China; Primary Care Unit (Zhirong Yang), School of Clinical Medicine, University of Cambridge, United Kingdom; Department of Population Medicine (X.L., S.T.), Harvard Medical School & Harvard Pilgrim Health Care Institute, Boston, MA; Center for Digestive Disease (J.Y.), The Seventh Affiliated Hospital, Sun Yat-sen University; Central Laboratory (X.G.), Shenzhen Key Laboratory of Precision Medicine for Hematological Malignancies, Shenzhen University General Hospital; School of Government (B.L.), Shenzhen University, Guangdong; Peking University Sixth Hospital (X.Y.), Peking University Institute of Mental Health, Beijing, China; Cambridge Public Health (C.B.), School of Clinical Medicine, University of Cambridge, United Kingdom; Division of Epidemiology (Zuyao Yang, J.T.), The JC School of Public Health & Primary Care, The Chinese University of Hong Kong; and Clinical Data Center (J.T.), Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangdong, China
| | - Xiaojuan Li
- From the Shenzhen Institute of Advanced Technology (Zhirong Yang, C.W., Z.Z., F.S., J.T.), Chinese Academy of Sciences, Guangdong, China; Primary Care Unit (Zhirong Yang), School of Clinical Medicine, University of Cambridge, United Kingdom; Department of Population Medicine (X.L., S.T.), Harvard Medical School & Harvard Pilgrim Health Care Institute, Boston, MA; Center for Digestive Disease (J.Y.), The Seventh Affiliated Hospital, Sun Yat-sen University; Central Laboratory (X.G.), Shenzhen Key Laboratory of Precision Medicine for Hematological Malignancies, Shenzhen University General Hospital; School of Government (B.L.), Shenzhen University, Guangdong; Peking University Sixth Hospital (X.Y.), Peking University Institute of Mental Health, Beijing, China; Cambridge Public Health (C.B.), School of Clinical Medicine, University of Cambridge, United Kingdom; Division of Epidemiology (Zuyao Yang, J.T.), The JC School of Public Health & Primary Care, The Chinese University of Hong Kong; and Clinical Data Center (J.T.), Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangdong, China
| | - Jinqiu Yuan
- From the Shenzhen Institute of Advanced Technology (Zhirong Yang, C.W., Z.Z., F.S., J.T.), Chinese Academy of Sciences, Guangdong, China; Primary Care Unit (Zhirong Yang), School of Clinical Medicine, University of Cambridge, United Kingdom; Department of Population Medicine (X.L., S.T.), Harvard Medical School & Harvard Pilgrim Health Care Institute, Boston, MA; Center for Digestive Disease (J.Y.), The Seventh Affiliated Hospital, Sun Yat-sen University; Central Laboratory (X.G.), Shenzhen Key Laboratory of Precision Medicine for Hematological Malignancies, Shenzhen University General Hospital; School of Government (B.L.), Shenzhen University, Guangdong; Peking University Sixth Hospital (X.Y.), Peking University Institute of Mental Health, Beijing, China; Cambridge Public Health (C.B.), School of Clinical Medicine, University of Cambridge, United Kingdom; Division of Epidemiology (Zuyao Yang, J.T.), The JC School of Public Health & Primary Care, The Chinese University of Hong Kong; and Clinical Data Center (J.T.), Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangdong, China
| | - Xuefeng Gao
- From the Shenzhen Institute of Advanced Technology (Zhirong Yang, C.W., Z.Z., F.S., J.T.), Chinese Academy of Sciences, Guangdong, China; Primary Care Unit (Zhirong Yang), School of Clinical Medicine, University of Cambridge, United Kingdom; Department of Population Medicine (X.L., S.T.), Harvard Medical School & Harvard Pilgrim Health Care Institute, Boston, MA; Center for Digestive Disease (J.Y.), The Seventh Affiliated Hospital, Sun Yat-sen University; Central Laboratory (X.G.), Shenzhen Key Laboratory of Precision Medicine for Hematological Malignancies, Shenzhen University General Hospital; School of Government (B.L.), Shenzhen University, Guangdong; Peking University Sixth Hospital (X.Y.), Peking University Institute of Mental Health, Beijing, China; Cambridge Public Health (C.B.), School of Clinical Medicine, University of Cambridge, United Kingdom; Division of Epidemiology (Zuyao Yang, J.T.), The JC School of Public Health & Primary Care, The Chinese University of Hong Kong; and Clinical Data Center (J.T.), Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangdong, China
| | - Bingyu Li
- From the Shenzhen Institute of Advanced Technology (Zhirong Yang, C.W., Z.Z., F.S., J.T.), Chinese Academy of Sciences, Guangdong, China; Primary Care Unit (Zhirong Yang), School of Clinical Medicine, University of Cambridge, United Kingdom; Department of Population Medicine (X.L., S.T.), Harvard Medical School & Harvard Pilgrim Health Care Institute, Boston, MA; Center for Digestive Disease (J.Y.), The Seventh Affiliated Hospital, Sun Yat-sen University; Central Laboratory (X.G.), Shenzhen Key Laboratory of Precision Medicine for Hematological Malignancies, Shenzhen University General Hospital; School of Government (B.L.), Shenzhen University, Guangdong; Peking University Sixth Hospital (X.Y.), Peking University Institute of Mental Health, Beijing, China; Cambridge Public Health (C.B.), School of Clinical Medicine, University of Cambridge, United Kingdom; Division of Epidemiology (Zuyao Yang, J.T.), The JC School of Public Health & Primary Care, The Chinese University of Hong Kong; and Clinical Data Center (J.T.), Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangdong, China
| | - Ziyi Zhao
- From the Shenzhen Institute of Advanced Technology (Zhirong Yang, C.W., Z.Z., F.S., J.T.), Chinese Academy of Sciences, Guangdong, China; Primary Care Unit (Zhirong Yang), School of Clinical Medicine, University of Cambridge, United Kingdom; Department of Population Medicine (X.L., S.T.), Harvard Medical School & Harvard Pilgrim Health Care Institute, Boston, MA; Center for Digestive Disease (J.Y.), The Seventh Affiliated Hospital, Sun Yat-sen University; Central Laboratory (X.G.), Shenzhen Key Laboratory of Precision Medicine for Hematological Malignancies, Shenzhen University General Hospital; School of Government (B.L.), Shenzhen University, Guangdong; Peking University Sixth Hospital (X.Y.), Peking University Institute of Mental Health, Beijing, China; Cambridge Public Health (C.B.), School of Clinical Medicine, University of Cambridge, United Kingdom; Division of Epidemiology (Zuyao Yang, J.T.), The JC School of Public Health & Primary Care, The Chinese University of Hong Kong; and Clinical Data Center (J.T.), Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangdong, China
| | - Sengwee Toh
- From the Shenzhen Institute of Advanced Technology (Zhirong Yang, C.W., Z.Z., F.S., J.T.), Chinese Academy of Sciences, Guangdong, China; Primary Care Unit (Zhirong Yang), School of Clinical Medicine, University of Cambridge, United Kingdom; Department of Population Medicine (X.L., S.T.), Harvard Medical School & Harvard Pilgrim Health Care Institute, Boston, MA; Center for Digestive Disease (J.Y.), The Seventh Affiliated Hospital, Sun Yat-sen University; Central Laboratory (X.G.), Shenzhen Key Laboratory of Precision Medicine for Hematological Malignancies, Shenzhen University General Hospital; School of Government (B.L.), Shenzhen University, Guangdong; Peking University Sixth Hospital (X.Y.), Peking University Institute of Mental Health, Beijing, China; Cambridge Public Health (C.B.), School of Clinical Medicine, University of Cambridge, United Kingdom; Division of Epidemiology (Zuyao Yang, J.T.), The JC School of Public Health & Primary Care, The Chinese University of Hong Kong; and Clinical Data Center (J.T.), Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangdong, China
| | - Xin Yu
- From the Shenzhen Institute of Advanced Technology (Zhirong Yang, C.W., Z.Z., F.S., J.T.), Chinese Academy of Sciences, Guangdong, China; Primary Care Unit (Zhirong Yang), School of Clinical Medicine, University of Cambridge, United Kingdom; Department of Population Medicine (X.L., S.T.), Harvard Medical School & Harvard Pilgrim Health Care Institute, Boston, MA; Center for Digestive Disease (J.Y.), The Seventh Affiliated Hospital, Sun Yat-sen University; Central Laboratory (X.G.), Shenzhen Key Laboratory of Precision Medicine for Hematological Malignancies, Shenzhen University General Hospital; School of Government (B.L.), Shenzhen University, Guangdong; Peking University Sixth Hospital (X.Y.), Peking University Institute of Mental Health, Beijing, China; Cambridge Public Health (C.B.), School of Clinical Medicine, University of Cambridge, United Kingdom; Division of Epidemiology (Zuyao Yang, J.T.), The JC School of Public Health & Primary Care, The Chinese University of Hong Kong; and Clinical Data Center (J.T.), Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangdong, China
| | - Carol Brayne
- From the Shenzhen Institute of Advanced Technology (Zhirong Yang, C.W., Z.Z., F.S., J.T.), Chinese Academy of Sciences, Guangdong, China; Primary Care Unit (Zhirong Yang), School of Clinical Medicine, University of Cambridge, United Kingdom; Department of Population Medicine (X.L., S.T.), Harvard Medical School & Harvard Pilgrim Health Care Institute, Boston, MA; Center for Digestive Disease (J.Y.), The Seventh Affiliated Hospital, Sun Yat-sen University; Central Laboratory (X.G.), Shenzhen Key Laboratory of Precision Medicine for Hematological Malignancies, Shenzhen University General Hospital; School of Government (B.L.), Shenzhen University, Guangdong; Peking University Sixth Hospital (X.Y.), Peking University Institute of Mental Health, Beijing, China; Cambridge Public Health (C.B.), School of Clinical Medicine, University of Cambridge, United Kingdom; Division of Epidemiology (Zuyao Yang, J.T.), The JC School of Public Health & Primary Care, The Chinese University of Hong Kong; and Clinical Data Center (J.T.), Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangdong, China
| | - Zuyao Yang
- From the Shenzhen Institute of Advanced Technology (Zhirong Yang, C.W., Z.Z., F.S., J.T.), Chinese Academy of Sciences, Guangdong, China; Primary Care Unit (Zhirong Yang), School of Clinical Medicine, University of Cambridge, United Kingdom; Department of Population Medicine (X.L., S.T.), Harvard Medical School & Harvard Pilgrim Health Care Institute, Boston, MA; Center for Digestive Disease (J.Y.), The Seventh Affiliated Hospital, Sun Yat-sen University; Central Laboratory (X.G.), Shenzhen Key Laboratory of Precision Medicine for Hematological Malignancies, Shenzhen University General Hospital; School of Government (B.L.), Shenzhen University, Guangdong; Peking University Sixth Hospital (X.Y.), Peking University Institute of Mental Health, Beijing, China; Cambridge Public Health (C.B.), School of Clinical Medicine, University of Cambridge, United Kingdom; Division of Epidemiology (Zuyao Yang, J.T.), The JC School of Public Health & Primary Care, The Chinese University of Hong Kong; and Clinical Data Center (J.T.), Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangdong, China.
| | - Feng Sha
- From the Shenzhen Institute of Advanced Technology (Zhirong Yang, C.W., Z.Z., F.S., J.T.), Chinese Academy of Sciences, Guangdong, China; Primary Care Unit (Zhirong Yang), School of Clinical Medicine, University of Cambridge, United Kingdom; Department of Population Medicine (X.L., S.T.), Harvard Medical School & Harvard Pilgrim Health Care Institute, Boston, MA; Center for Digestive Disease (J.Y.), The Seventh Affiliated Hospital, Sun Yat-sen University; Central Laboratory (X.G.), Shenzhen Key Laboratory of Precision Medicine for Hematological Malignancies, Shenzhen University General Hospital; School of Government (B.L.), Shenzhen University, Guangdong; Peking University Sixth Hospital (X.Y.), Peking University Institute of Mental Health, Beijing, China; Cambridge Public Health (C.B.), School of Clinical Medicine, University of Cambridge, United Kingdom; Division of Epidemiology (Zuyao Yang, J.T.), The JC School of Public Health & Primary Care, The Chinese University of Hong Kong; and Clinical Data Center (J.T.), Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangdong, China.
| | - Jinling Tang
- From the Shenzhen Institute of Advanced Technology (Zhirong Yang, C.W., Z.Z., F.S., J.T.), Chinese Academy of Sciences, Guangdong, China; Primary Care Unit (Zhirong Yang), School of Clinical Medicine, University of Cambridge, United Kingdom; Department of Population Medicine (X.L., S.T.), Harvard Medical School & Harvard Pilgrim Health Care Institute, Boston, MA; Center for Digestive Disease (J.Y.), The Seventh Affiliated Hospital, Sun Yat-sen University; Central Laboratory (X.G.), Shenzhen Key Laboratory of Precision Medicine for Hematological Malignancies, Shenzhen University General Hospital; School of Government (B.L.), Shenzhen University, Guangdong; Peking University Sixth Hospital (X.Y.), Peking University Institute of Mental Health, Beijing, China; Cambridge Public Health (C.B.), School of Clinical Medicine, University of Cambridge, United Kingdom; Division of Epidemiology (Zuyao Yang, J.T.), The JC School of Public Health & Primary Care, The Chinese University of Hong Kong; and Clinical Data Center (J.T.), Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangdong, China
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Kumar A, Pramanik J, Goyal N, Chauhan D, Sivamaruthi BS, Prajapati BG, Chaiyasut C. Gut Microbiota in Anxiety and Depression: Unveiling the Relationships and Management Options. Pharmaceuticals (Basel) 2023; 16:ph16040565. [PMID: 37111321 PMCID: PMC10146621 DOI: 10.3390/ph16040565] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 04/03/2023] [Accepted: 04/06/2023] [Indexed: 04/29/2023] Open
Abstract
The gut microbiota is critical for maintaining human health and the immunological system. Several neuroscientific studies have shown the significance of microbiota in developing brain systems. The gut microbiota and the brain are interconnected in a bidirectional relationship, as research on the microbiome-gut-brain axis shows. Significant evidence links anxiety and depression disorders to the community of microbes that live in the gastrointestinal system. Modified diet, fish and omega-3 fatty acid intake, macro- and micro-nutrient intake, prebiotics, probiotics, synbiotics, postbiotics, fecal microbiota transplantation, and 5-HTP regulation may all be utilized to alter the gut microbiota as a treatment approach. There are few preclinical and clinical research studies on the effectiveness and reliability of various therapeutic approaches for depression and anxiety. This article highlights relevant research on the association of gut microbiota with depression and anxiety and the different therapeutic possibilities of gut microbiota modification.
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Affiliation(s)
- Akash Kumar
- Department of Food Technology, SRM University, Sonipat 131029, India
| | - Jhilam Pramanik
- Department of Food Technology, ITM University, Gwalior 474001, India
| | - Nandani Goyal
- Department of Skill Agriculture, Shri Vishwakarma Skill University, Gurugram 122003, India
| | - Dimple Chauhan
- School of Bio-Engineering and Food Technology, Shoolini University, Solan 173229, India
| | - Bhagavathi Sundaram Sivamaruthi
- Office of Research Administration, Chiang Mai University, Chiang Mai 50200, Thailand
- Innovation Center for Holistic Health, Nutraceuticals, and Cosmeceuticals, Faculty of Pharmacy, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Bhupendra G Prajapati
- Shree S. K. Patel College of Pharmaceutical Education and Research, Ganpat University, Mehsana 384012, India
| | - Chaiyavat Chaiyasut
- Innovation Center for Holistic Health, Nutraceuticals, and Cosmeceuticals, Faculty of Pharmacy, Chiang Mai University, Chiang Mai 50200, Thailand
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Efficacy of faecal microbiota transplantation in patients with progressive supranuclear palsy-Richardson's syndrome: a phase 2, single centre, randomised clinical trial. EClinicalMedicine 2023; 58:101888. [PMID: 36969340 PMCID: PMC10034412 DOI: 10.1016/j.eclinm.2023.101888] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 02/09/2023] [Accepted: 02/10/2023] [Indexed: 03/19/2023] Open
Abstract
Background Faecal microbiota transplantation (FMT) has demonstrated efficacy in treating gastrointestinal (GI) diseases, such as Clostridium difficile infection (CDI) and inflammatory bowel disease (IBD). GI dysfunction is a frequent and occasionally dominating symptom of progressive supranuclear palsy-Richardson's syndrome (PSP-RS). However, it is not known whether FMT has clinical efficacy for PSP-RS. Methods This 36-week, randomised, placebo-controlled, parallel-group, phase 2 clinical trial was performed at a university tertiary referral hospital in China. From August 15 2021 to December 31 2021, a total of 68 newly diagnosed patients with PSP-RS (male 40 [59%], female 28 [41%]) who had never received any antiparkinsonian medications were enrolled and randomly assigned to receive either healthy donor FMT (n = 34, FMT group) or a mixture of 0.9% saline and food colouring (E150c) as sham transplantation (n = 34, placebo group) through transendoscopic enteral tubing (TET). Two days after oral antibiotics, participants received 1 week of transplantation. After an interval of 4 weeks, retransplantation was performed. Then, the last transplantation was given after another interval of 4 weeks, and the participants were followed up for 24 weeks (week 36). Clinicaltrials.gov identifier: ChiCTR-2100045397. Findings Among 68 patients who were randomised (mean age, 67.2 (SD 5.1); 40 [59%] were male, 28 [41%] were female), 63 participants completed the trial. Efficacy analyses were performed on the intention-to-treat (ITT) analysis set. At week 16, the mean PSP Rating Scale (PSPRS) scores (the primary outcome) improved from 40.1 (SD 7.6) to 36.9 (SD 5.9) in the FMT group, whereas the scores changed from 40.1 (SD 6.9) to 41.7 (SD 6.2) in the placebo group, for a treatment benefit of 4.3 (95% CI, 3.2-5.4) (P < 0.0001). After 3-cycle intervention, symptoms of constipation, depression, and anxiety (the secondary outcome) improved significantly at week 16 in the FMT group compared with the placebo group, the majority of which were maintained at the 24-week follow-up (week 36). Interpretation Our findings suggest that, compared with placebo, FMT treatment significantly improved motor and nonmotor symptoms in patients with PSP-RS, as well as reduced intestinal inflammation and enhanced the intestinal barrier by regulating the intestinal microbiota composition. Funding The National Natural Science Foundation of China (No. 82122022, 82171248, 81873791, and 82230084), Natural Science Foundation of Henan Province for Excellent Young Scholars (no. 202300410357), and Henan Province Young and Middle-Aged Health Science and Technology Innovation Talent Project (YXKC2020033).
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Li J, Zhu S, Wang Y, Fan M, Dai J, Zhu C, Xu K, Cui M, Suo C, Jin L, Jiang Y, Chen X. Metagenomic association analysis of cognitive impairment in community-dwelling older adults. Neurobiol Dis 2023; 180:106081. [PMID: 36931530 DOI: 10.1016/j.nbd.2023.106081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 02/25/2023] [Accepted: 03/13/2023] [Indexed: 03/17/2023] Open
Abstract
The gut microbiota is reportedly involved in neurodegenerative disorders, and exploration of differences in the gut microbiota in different cognitive status could provide clues for early detection and intervention in cognitive impairment. Here, we used data from the Taizhou Imaging Study (N = 516), a community-based cohort, to compare the overall structure of the gut microbiota at the species level through metagenomic sequencing, and to explore associations with cognition. Interestingly, bacteria capable of producing short-chain fatty acids (SCFAs), such as Bacteroides massiliensis, Bifidobacterium pseudocatenulatum, Fusicatenibacter saccharivorans and Eggerthella lenta, that can biotransform polyphenols, were positively associated with better cognitive performance (p < 0.05). Although Diallister invisus and Streptococcus gordonii were not obviously related to cognition, the former was dominant in individuals with mild cognitive impairment (MCI), while the later was more abundant in cognitively normal (CN) than MCI groups, and positively associated with cognitive performance (p < 0.05). Functional analysis further supported a potential role of SCFAs and lactic acid in the association between the gut microbiota and cognition. The significant associations persisted after accounting for dietary patterns. Collectively, our results demonstrate an association between the gut microbiota and cognition in the general population, indicating a potential role in cognitive impairment. The findings provide clues for microbiome biomarkers of dementia, and insight for the prevention and treatment of dementia.
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Affiliation(s)
- Jincheng Li
- State Key Laboratory of Genetic Engineering, Human Phenome Institute, Zhangjiang Fudan International Innovation Center, National Clinical Research Center for Aging and Medicine, Huashan Hospital, Fudan University, Shanghai, China; Fudan University Taizhou Institute of Health Sciences, Taizhou, Jiangsu, China
| | - Sibo Zhu
- State Key Laboratory of Genetic Engineering, Human Phenome Institute, Zhangjiang Fudan International Innovation Center, National Clinical Research Center for Aging and Medicine, Huashan Hospital, Fudan University, Shanghai, China; Fudan University Taizhou Institute of Health Sciences, Taizhou, Jiangsu, China
| | - Yingzhe Wang
- Department of Neurology, Huashan Hospital, Fudan University, Shanghai, China
| | - Min Fan
- Taixing Disease Control and Prevention Center, Taizhou, Jiangsu, China
| | - Jiacheng Dai
- State Key Laboratory of Genetic Engineering, Human Phenome Institute, Zhangjiang Fudan International Innovation Center, National Clinical Research Center for Aging and Medicine, Huashan Hospital, Fudan University, Shanghai, China; Fudan University Taizhou Institute of Health Sciences, Taizhou, Jiangsu, China
| | - Chengkai Zhu
- State Key Laboratory of Genetic Engineering, Human Phenome Institute, Zhangjiang Fudan International Innovation Center, National Clinical Research Center for Aging and Medicine, Huashan Hospital, Fudan University, Shanghai, China
| | - Kelin Xu
- Fudan University Taizhou Institute of Health Sciences, Taizhou, Jiangsu, China; Ministry of Education Key Laboratory of Public Health Safety, Department of Biostatistics, School of Public Health, Fudan University, Shanghai, China
| | - Mei Cui
- Department of Neurology, Huashan Hospital, Fudan University, Shanghai, China
| | - Chen Suo
- Fudan University Taizhou Institute of Health Sciences, Taizhou, Jiangsu, China; Ministry of Education Key Laboratory of Public Health Safety, Department of Epidemiology, School of Public Health, Fudan University, Shanghai, China; Shanghai Institute of Infectious Disease and Biosecurity, Shanghai, China
| | - Li Jin
- State Key Laboratory of Genetic Engineering, Human Phenome Institute, Zhangjiang Fudan International Innovation Center, National Clinical Research Center for Aging and Medicine, Huashan Hospital, Fudan University, Shanghai, China; Fudan University Taizhou Institute of Health Sciences, Taizhou, Jiangsu, China
| | - Yanfeng Jiang
- State Key Laboratory of Genetic Engineering, Human Phenome Institute, Zhangjiang Fudan International Innovation Center, National Clinical Research Center for Aging and Medicine, Huashan Hospital, Fudan University, Shanghai, China; Fudan University Taizhou Institute of Health Sciences, Taizhou, Jiangsu, China; International Human Phenome Institute (Shanghai), Shanghai, China.
| | - Xingdong Chen
- State Key Laboratory of Genetic Engineering, Human Phenome Institute, Zhangjiang Fudan International Innovation Center, National Clinical Research Center for Aging and Medicine, Huashan Hospital, Fudan University, Shanghai, China; Fudan University Taizhou Institute of Health Sciences, Taizhou, Jiangsu, China; Yiwu Research Institute of Fudan University, Yiwu, Zhejiang, China.
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Wang Z, Zhang Z, Liu J, Guo M, Li H. Panax Ginseng in the treatment of Alzheimer's disease and vascular dementia. J Ginseng Res 2023. [DOI: 10.1016/j.jgr.2023.03.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023] Open
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Pi WX, Huan XY, Zhuang Y, Zhang J, Shi XQ, Zhou GS. Simultaneous quantification of multiple active components of the ginkgo ketoester tablet when combined with donepezil in four biological matrices from an Alzheimer’s animal model: Evaluation of drug distribution patterns in vivo. J LIQ CHROMATOGR R T 2023. [DOI: 10.1080/10826076.2023.2182318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
Affiliation(s)
- Wen-Xia Pi
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, and Jiangsu Key Laboratory for High Technology Research of TCM Formulae, and National and Local Collaborative Engineering Center of Chinese Medicinal Resources Industrialization and Formulae Innovative Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Xiao-Yu Huan
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, and Jiangsu Key Laboratory for High Technology Research of TCM Formulae, and National and Local Collaborative Engineering Center of Chinese Medicinal Resources Industrialization and Formulae Innovative Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Yu Zhuang
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, and Jiangsu Key Laboratory for High Technology Research of TCM Formulae, and National and Local Collaborative Engineering Center of Chinese Medicinal Resources Industrialization and Formulae Innovative Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Jing Zhang
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, and Jiangsu Key Laboratory for High Technology Research of TCM Formulae, and National and Local Collaborative Engineering Center of Chinese Medicinal Resources Industrialization and Formulae Innovative Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Xu-Qin Shi
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, and Jiangsu Key Laboratory for High Technology Research of TCM Formulae, and National and Local Collaborative Engineering Center of Chinese Medicinal Resources Industrialization and Formulae Innovative Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Gui-Sheng Zhou
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, and Jiangsu Key Laboratory for High Technology Research of TCM Formulae, and National and Local Collaborative Engineering Center of Chinese Medicinal Resources Industrialization and Formulae Innovative Medicine, Nanjing University of Chinese Medicine, Nanjing, China
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Guo Y, Chen X, Gong P, Li G, Yao W, Yang W. The Gut-Organ-Axis Concept: Advances the Application of Gut-on-Chip Technology. Int J Mol Sci 2023; 24:ijms24044089. [PMID: 36835499 PMCID: PMC9962350 DOI: 10.3390/ijms24044089] [Citation(s) in RCA: 21] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2022] [Revised: 01/19/2023] [Accepted: 02/03/2023] [Indexed: 02/22/2023] Open
Abstract
The intestine is considered to be a vital digestive organ to absorb nutrients and is the largest immune organ, while numerous microorganisms coexist with the host. It is well known that the complex interactions between the gut microbiota and the host's immune system inevitably affect the function of other organs, creating an "axis" between them. During the past few years, a new technique based mainly on microfluidics and cell biology has been developed to emulate the structure, function, and microenvironment of the human gut, called the "gut-on-chip". This microfluidic chip provides insight into key aspects of gut function in health and disease, such as the gut-brain axis, gut-liver axis, gut-kidney axis, and gut-lung axis. In this review, we first describe the basic theory of the gut axis and the various composition and parameter monitoring of the gut microarray systems, as well as summarize the development and emerging advances in the gut-organ-on-chip, with a focus on the host-gut flora and nutrient metabolism, and highlight their role in pathophysiological studies. In addition, this paper discusses the challenges and prospects for the current development and further use of the gut-organ-on-chip platform.
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Affiliation(s)
| | | | - Pin Gong
- Correspondence: ; Tel.: +86-13772196479
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Faulin TDES, Estadella D. ALZHEIMER'S DISEASE AND ITS RELATIONSHIP WITH THE MICROBIOTA-GUT-BRAIN AXIS. ARQUIVOS DE GASTROENTEROLOGIA 2023; 60:144-154. [PMID: 37194773 DOI: 10.1590/s0004-2803.202301000-17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Accepted: 01/30/2023] [Indexed: 05/18/2023]
Abstract
BACKGROUND Alzheimer's disease (AD) is a progressive and irreversible neurodegenerative disease, characterized by the accumulation of amyloid plaques and neurofibrillary tangles in the brain. Several pathways enable bidirectional communication between the central nervous system (CNS), the intestine and its microbiota, constituting the microbiota-gut-brain axis. OBJECTIVE Review the pathophysiology of AD, relate it to the microbiota-gut-brain axis and discuss the possibility of using probiotics in the treatment and/or prevention of this disease. METHODS Search of articles from the PubMed database published in the last 5 years (2017 to 2022) structure the narrative review. RESULTS The composition of the gut microbiota influences the CNS, resulting in changes in host behavior and may be related to the development of neurodegenerative diseases. Some metabolites produced by the intestinal microbiota, such as trimethylamine N-oxide (TMAO), may be involved in the pathogenesis of AD, while other compounds produced by the microbiota during the fermentation of food in the intestine, such as D-glutamate and fatty acids short chain, are beneficial in cognitive function. The consumption of live microorganisms beneficial to health, known as probiotics, has been tested in laboratory animals and humans to evaluate the effect on AD. CONCLUSION Although there are few clinical trials evaluating the effect of probiotic consumption in humans with AD, the results to date indicate a beneficial contribution of the use of probiotics in this disease.
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Affiliation(s)
| | - Debora Estadella
- Universidade Federal de São Paulo, Campus Baixada Santista, Santos, Brasil
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Bou Zerdan M, Hebbo E, Hijazi A, El Gemayel M, Nasr J, Nasr D, Yaghi M, Bouferraa Y, Nagarajan A. The Gut Microbiome and Alzheimer's Disease: A Growing Relationship. Curr Alzheimer Res 2022; 19:CAR-EPUB-128458. [PMID: 36578263 DOI: 10.2174/1567205020666221227090125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 10/03/2022] [Accepted: 10/19/2022] [Indexed: 12/30/2022]
Abstract
Evidence that the gut microbiota plays a key role in the pathogenesis of Alzheimer's disease is already un-ravelling. The microbiota-gut-brain axis is a bidirectional communication system that is not fully understood but includes neural, immune, endocrine, and metabolic pathways. The progression of Alzheimer's disease is supported by mechanisms related to the imbalance in the gut microbiota and the development of amyloid plaques in the brain, which are at the origin of Alzheimer's disease. Alterations in the composition of the gut microbiome led to dysregulation in the pathways governing this system. This leads to neurodegeneration through neuroinflammation and neurotransmitter dysregulation. Neurodegeneration and disruption of the blood-brain barrier are frontiers at the origin of Alzheimer's disease. Furthermore, bacteria populating the gut microbiota can secrete large amounts of amyloid proteins and lipopolysaccharides, which modulate signaling pathways and alter the production of proinflammatory cytokines associated with the pathogenesis of Alz-heimer's disease. Importantly, through molecular mimicry, bacterial amyloids may elicit cross-seeding of misfolding and induce microglial priming at different levels of the brain-gut-microbiota axis. The potential mechanisms of amyloid spreading include neuron-to-neuron or distal neuron spreading, direct blood-brain barrier crossing, or via other cells such as astrocytes, fibroblasts, microglia, and immune system cells. Gut microbiota metabolites, including short-chain fatty acids, pro-inflammatory factors, and neurotransmitters may also affect AD pathogenesis and associated cognitive decline. The purpose of this review is to summarize and discuss the current findings that may elucidate the role of gut microbiota in the development of Alzheimer's disease. Understanding the underlying mechanisms may provide new insights into novel therapeutic strategies for Alzheimer's disease, such as probiotics and targeted oligosaccharides.
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Affiliation(s)
- Maroun Bou Zerdan
- Department of Internal Medicine, SUNY Upstate Medical University, New York, USA
- Department of Hematology and Oncology, Cleveland Clinic Florida, Weston, Florida, USA
| | - Elsa Hebbo
- Faculty of Medicine, American University of Beirut, Beirut 2020, Lebanon
| | - Ali Hijazi
- Faculty of Medicine, American University of Beirut, Beirut 2020, Lebanon
| | - Maria El Gemayel
- Department of Gastroenterology and Hepatology, Hotel-Dieu de France Hospital, Faculty of Medicine, Saint Joseph University, Beirut, Lebanon
| | - Janane Nasr
- Saint George Hospital, Faculty of Medicine, University of Balamand, Beirut 1100, Lebanon
| | - Dayana Nasr
- Department of Internal Medicine, SUNY Upstate Medical University, New York, USA
| | - Marita Yaghi
- Department of Hematology and Oncology, Cleveland Clinic Florida, Weston, Florida, USA
| | - Youssef Bouferraa
- Department of Internal Medicine, Cleveland Clinic, Cleveland, OH, 44195, USA
| | - Arun Nagarajan
- Department of Internal Medicine, Cleveland Clinic, Cleveland, OH, 44195, USA
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The Role of Gut Dysbiosis in the Pathophysiology of Neuropsychiatric Disorders. Cells 2022; 12:cells12010054. [PMID: 36611848 PMCID: PMC9818777 DOI: 10.3390/cells12010054] [Citation(s) in RCA: 31] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 12/09/2022] [Accepted: 12/14/2022] [Indexed: 12/25/2022] Open
Abstract
Mounting evidence shows that the complex gut microbial ecosystem in the human gastrointestinal (GI) tract regulates the physiology of the central nervous system (CNS) via microbiota and the gut-brain (MGB) axis. The GI microbial ecosystem communicates with the brain through the neuroendocrine, immune, and autonomic nervous systems. Recent studies have bolstered the involvement of dysfunctional MGB axis signaling in the pathophysiology of several neurodegenerative, neurodevelopmental, and neuropsychiatric disorders (NPDs). Several investigations on the dynamic microbial system and genetic-environmental interactions with the gut microbiota (GM) have shown that changes in the composition, diversity and/or functions of gut microbes (termed "gut dysbiosis" (GD)) affect neuropsychiatric health by inducing alterations in the signaling pathways of the MGB axis. Interestingly, both preclinical and clinical evidence shows a positive correlation between GD and the pathogenesis and progression of NPDs. Long-term GD leads to overstimulation of hypothalamic-pituitary-adrenal (HPA) axis and the neuroimmune system, along with altered neurotransmitter levels, resulting in dysfunctional signal transduction, inflammation, increased oxidative stress (OS), mitochondrial dysfunction, and neuronal death. Further studies on the MGB axis have highlighted the significance of GM in the development of brain regions specific to stress-related behaviors, including depression and anxiety, and the immune system in the early life. GD-mediated deregulation of the MGB axis imbalances host homeostasis significantly by disrupting the integrity of the intestinal and blood-brain barrier (BBB), mucus secretion, and gut immune and brain immune functions. This review collates evidence on the potential interaction between GD and NPDs from preclinical and clinical data. Additionally, we summarize the use of non-therapeutic modulators such as pro-, pre-, syn- and post-biotics, and specific diets or fecal microbiota transplantation (FMT), which are promising targets for the management of NPDs.
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Liu YS, Zhao HF, Li Q, Cui HW, Huang GD. Research Progress on the Etiology and Pathogenesis of Alzheimer's Disease from the Perspective of Chronic Stress. Aging Dis 2022:AD.2022.1211. [PMID: 37163426 PMCID: PMC10389837 DOI: 10.14336/ad.2022.1211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Accepted: 12/12/2022] [Indexed: 05/12/2023] Open
Abstract
Due to its extremely complex pathogenesis, no effective drugs to prevent, delay progression, or cure Alzheimer's disease (AD) exist at present. The main pathological features of AD are senile plaques composed of β-amyloid, neurofibrillary tangles formed by hyperphosphorylation of the tau protein, and degeneration or loss of neurons in the brain. Many risk factors associated with the onset of AD, including gene mutations, aging, traumatic brain injury, endocrine and cardiovascular diseases, education level, and obesity. Growing evidence points to chronic stress as one of the major risk factors for AD, as it can promote the onset and development of AD-related pathologies via a mechanism that is not well known. The use of murine stress models, including restraint, social isolation, noise, and unpredictable stress, has contributed to improving our understanding of the relationship between chronic stress and AD. This review summarizes the evidence derived from murine models on the pathological features associated with AD and the related molecular mechanisms induced by chronic stress. These results not only provide a retrospective interpretation for understanding the pathogenesis of AD, but also provide a window of opportunity for more effective preventive and identifying therapeutic strategies for stress-induced AD.
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Affiliation(s)
- Yun-Sheng Liu
- Department of Neurosurgery, Shenzhen Second People's Hospital/the First Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen, China
| | - Hua-Fu Zhao
- Department of Neurosurgery, Shenzhen Second People's Hospital/the First Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen, China
| | - Qian Li
- Department of Neurosurgery, Shenzhen Second People's Hospital/the First Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen, China
| | - Han-Wei Cui
- The Central Laboratory, Shenzhen Second People's Hospital/the First Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen, China
- Central Laboratory, Shenzhen Samii Medical Center, Shenzhen, China
| | - Guo-Dong Huang
- Department of Neurosurgery, Shenzhen Second People's Hospital/the First Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen, China
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Boehme M, Guzzetta KE, Wasén C, Cox LM. The gut microbiota is an emerging target for improving brain health during ageing. GUT MICROBIOME (CAMBRIDGE, ENGLAND) 2022; 4:E2. [PMID: 37179659 PMCID: PMC10174391 DOI: 10.1017/gmb.2022.11] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
The gut microbiota plays crucial roles in maintaining the health and homeostasis of its host throughout lifespan, including through its ability to impact brain function and regulate behaviour during ageing. Studies have shown that there are disparate rates of biologic ageing despite equivalencies in chronologic age, including in the development of neurodegenerative diseases, which suggests that environmental factors may play an important role in determining health outcomes in ageing. Recent evidence demonstrates that the gut microbiota may be a potential novel target to ameliorate symptoms of brain ageing and promote healthy cognition. This review highlights the current knowledge around the relationships between the gut microbiota and host brain ageing, including potential contributions to age-related neurodegenerative diseases. Furthermore, we assess key areas for which gut microbiota-based strategies may present as opportunities for intervention.
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Affiliation(s)
- Marcus Boehme
- Nestlé Institute of Health Sciences, Nestlé Research, Société des Produits Nestlé S.A., Lausanne, Switzerland
| | - Katherine Elizabeth Guzzetta
- APC Microbiome Ireland, University College Cork, Cork, Ireland
- Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland
- Ann Romney Center for Neurologic Diseases, Harvard Medical School, Brigham and Women’s Hospital, Boston, MA, USA
- Department of Biosystems Science and Engineering, ETH Zurich, Basel, Switzerland
| | - Caroline Wasén
- Ann Romney Center for Neurologic Diseases, Harvard Medical School, Brigham and Women’s Hospital, Boston, MA, USA
- Department of Biology and Biological Engineering, Chalmers University of Technology, Gothenburg, Sweden
| | - Laura Michelle Cox
- Ann Romney Center for Neurologic Diseases, Harvard Medical School, Brigham and Women’s Hospital, Boston, MA, USA
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Li X, Han G, Zhao J, Huang X, Feng Y, Huang J, Lan X, Huang X, Wang Z, Shen J, He S, Li Q, Song J, Wang J, Meng L. Intestinal flora induces depression by mediating the dysregulation of cerebral cortex gene expression and regulating the metabolism of stroke patients. Front Mol Biosci 2022; 9:865788. [PMID: 36533076 PMCID: PMC9748625 DOI: 10.3389/fmolb.2022.865788] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Accepted: 11/08/2022] [Indexed: 10/27/2023] Open
Abstract
Post-stroke depression (PSD) is a common cerebrovascular complication characterized by complex pathogenesis and poor treatment effects. Here, we tested the influence of differentially expressed genes (DEGs), non-targeted metabolites, and intestinal microbes on the occurrence and development of PSD. We acquired gene expression profiles for stroke patients, depression patients, and healthy controls from the Gene Expression Omnibus database. After screening for DEGs using differential expression analysis, we identified common DEGs in stroke and depression patients that were considered to form the molecular basis of PSD. Functional enrichment analysis of DEGs also revealed that the majority of biological functions were closely related to metabolism, immunity, the nervous system, and microorganisms, and we also collected blood and stool samples from healthy controls, stroke patients, and PSD patients and performed 16S rDNA sequencing and untargeted metabolomics. After evaluating the quality of the sequencing data, we compared the diversity of the metabolites and intestinal flora within and between groups. Metabolic pathway enrichment analysis was used to identify metabolic pathways that were significantly involved in stroke and PSD, and a global metabolic network was constructed to explore the pathogenesis of PSD. Additionally, we constructed a global regulatory network based on 16S rDNA sequencing, non-targeted metabolomics, and transcriptomics to explore the pathogenesis of PSD through correlation analysis. Our results suggest that intestinal flora associates the dysregulation of cerebral cortex gene expression and could potentially promote the occurrence of depression by affecting the metabolism of stroke patients. Our findings may be helpful in identifying new targets for the prevention and treatment of PSD.
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Affiliation(s)
- Xuebin Li
- Center for Systemic Inflammation Research (CSIR), School of Preclinical Medicine, Youjiang Medical University for Nationalities, Baise, Guangxi, China
- Department of Neurology, The Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, Guangxi, China
| | - Guangshun Han
- Department of Neurology, Liuzhou People’s Hospital, Liuzhou, Guangxi, China
| | - Jingjie Zhao
- Life Science and Clinical Research Center, The Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, Guangxi, China
| | - Xiaohua Huang
- Department of Neurology, The Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, Guangxi, China
| | - Yun Feng
- Department of Neurology, The Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, Guangxi, China
| | - Junfang Huang
- Department of Neurology, The Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, Guangxi, China
| | - Xuequn Lan
- Department of Neurology, The Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, Guangxi, China
| | - Xiaorui Huang
- Department of Neurology, The Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, Guangxi, China
| | - Zechen Wang
- Center for Systemic Inflammation Research (CSIR), School of Preclinical Medicine, Youjiang Medical University for Nationalities, Baise, Guangxi, China
| | - Jiajia Shen
- Center for Systemic Inflammation Research (CSIR), School of Preclinical Medicine, Youjiang Medical University for Nationalities, Baise, Guangxi, China
| | - Siyuan He
- Center for Systemic Inflammation Research (CSIR), School of Preclinical Medicine, Youjiang Medical University for Nationalities, Baise, Guangxi, China
| | - Qiuhao Li
- Center for Systemic Inflammation Research (CSIR), School of Preclinical Medicine, Youjiang Medical University for Nationalities, Baise, Guangxi, China
| | - Jian Song
- Center for Systemic Inflammation Research (CSIR), School of Preclinical Medicine, Youjiang Medical University for Nationalities, Baise, Guangxi, China
- Institute of Cardiovascular Sciences, Guangxi Academy of Medical Sciences, Nanning, Guangxi, China
| | - Jie Wang
- Center for Systemic Inflammation Research (CSIR), School of Preclinical Medicine, Youjiang Medical University for Nationalities, Baise, Guangxi, China
- Department of Renal Diseases, The Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, Guangxi, China
| | - Lingzhang Meng
- Center for Systemic Inflammation Research (CSIR), School of Preclinical Medicine, Youjiang Medical University for Nationalities, Baise, Guangxi, China
- Institute of Cardiovascular Sciences, Guangxi Academy of Medical Sciences, Nanning, Guangxi, China
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Hashim HM, Makpol S. A review of the preclinical and clinical studies on the role of the gut microbiome in aging and neurodegenerative diseases and its modulation. Front Cell Neurosci 2022; 16:1007166. [PMID: 36406749 PMCID: PMC9669379 DOI: 10.3389/fncel.2022.1007166] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2022] [Accepted: 10/03/2022] [Indexed: 12/06/2023] Open
Abstract
As the world population ages, the burden of age-related health problems grows, creating a greater demand for new novel interventions for healthy aging. Advancing aging is related to a loss of beneficial mutualistic microbes in the gut microbiota caused by extrinsic and intrinsic factors such as diet, sedentary lifestyle, sleep deprivation, circadian rhythms, and oxidative stress, which emerge as essential elements in controlling and prolonging life expectancy of healthy aging. This condition is known as gut dysbiosis, and it affects normal brain function via the brain-gut microbiota (BGM) axis, which is a bidirectional link between the gastrointestinal tract (GIT) and the central nervous system (CNS) that leads to the emergence of brain disorders such as Alzheimer's disease (AD), Parkinson's disease (PD), amyotrophic lateral sclerosis (ALS), and frontotemporal dementia (FTD). Here, we reviewed the role of the gut microbiome in aging and neurodegenerative diseases, as well as provided a comprehensive review of recent findings from preclinical and clinical studies to present an up-to-date overview of recent advances in developing strategies to modulate the intestinal microbiome by probiotic administration, dietary intervention, fecal microbiota transplantation (FMT), and physical activity to address the aging process and prevent neurodegenerative diseases. The findings of this review will provide researchers in the fields of aging and the gut microbiome design innovative studies that leverage results from preclinical and clinical studies to better understand the nuances of aging, gut microbiome, and neurodegenerative diseases.
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Affiliation(s)
| | - Suzana Makpol
- Department of Biochemistry, Faculty of Medicine, Universiti Kebangsaan Malaysia Medical Centre, Kuala Lumpur, Malaysia
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Implications of Microorganisms in Alzheimer's Disease. Curr Issues Mol Biol 2022; 44:4584-4615. [PMID: 36286029 PMCID: PMC9600878 DOI: 10.3390/cimb44100314] [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] [Received: 09/06/2022] [Revised: 09/23/2022] [Accepted: 09/28/2022] [Indexed: 11/20/2022] Open
Abstract
Alzheimer’s disease (AD) is a deadly brain degenerative disorder that leads to brain shrinkage and dementia. AD is manifested with hyperphosphorylated tau protein levels and amyloid beta (Aβ) peptide buildup in the hippocampus and cortex regions of the brain. The nervous tissue of AD patients also contains fungal proteins and DNA which are linked to bacterial infections, suggesting that polymicrobial infections also occur in the brains of those with AD. Both immunohistochemistry and next-generation sequencing (NGS) techniques were employed to assess fungal and bacterial infections in the brain tissue of AD patients and non-AD controls, with the most prevalent fungus genera detected in AD patients being Alternaria, Botrytis, Candida, and Malassezia. Interestingly, Fusarium was the most common genus detected in the control group. Both AD patients and controls were also detectable for Proteobacteria, followed by Firmicutes, Actinobacteria, and Bacteroides for bacterial infection. At the family level, Burkholderiaceae and Staphylococcaceae exhibited higher levels in the brains of those with AD than the brains of the control group. Accordingly, there is thought to be a viscous cycle of uncontrolled neuroinflammation and neurodegeneration in the brain, caused by agents such as the herpes simplex virus type 1 (HSV1), Chlamydophilapneumonia, and Spirochetes, and the presence of apolipoprotein E4 (APOE4), which is associated with an increased proinflammatory response in the immune system. Systemic proinflammatory cytokines are produced by microorganisms such as Cytomegalovirus, Helicobacter pylori, and those related to periodontal infections. These can then cross the blood–brain barrier (BBB) and lead to the onset of dementia. Here, we reviewed the relationship between the etiology of AD and microorganisms (such as bacterial pathogens, Herpesviridae viruses, and periodontal pathogens) according to the evidence available to understand the pathogenesis of AD. These findings might guide a targeted anti-inflammatory therapeutic approach to AD.
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Jin Y, Hu F, Zhu J. Exploration of acupuncture therapy in the treatment of mild cognitive impairment based on the brain-gut axis theory. Front Hum Neurosci 2022; 16:891411. [PMID: 36204718 PMCID: PMC9531719 DOI: 10.3389/fnhum.2022.891411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Accepted: 08/24/2022] [Indexed: 01/31/2023] Open
Abstract
Background Mild cognitive impairment (MCI) is an intermediary state between normal aging and dementia. Early intervention for MCI may be a key opportunity in managing dementia. Recent studies have demonstrated the alterations in the gut microbial communities associated with MCI. This study aims to evaluate if acupuncture can improve cognitive function in subjects with MCI and explore the possible mechanism of acupuncture by better defining the interactions of gut microbiota. Methods A randomized assessor-blind controlled study is proposed. A total of 62 subjects will be recruited and randomly allocated into two groups in a 1:1 ratio: the treatment and control groups. Participants in the treatment group will receive active acupuncture and exercise/cognitive training (conventional treatment). The control group will receive sham acupuncture and exercise/cognitive training. Each participant will receive active or sham acupuncture for 12 weeks. The primary outcome will be the Montreal Cognitive Assessment (MoCA) score and intestinal flora. Secondary outcomes will include mini-mental state examination (MMSE) and activity of daily living (ADL) scores. Various scales will be collected at baseline, during the treatment (weeks 4 and 8), week 12, and months 4 and 6 after the intervention. Feces will be collected before and after the treatment based on 16S rRNA gene sequencing technology for each participant to characterize the intestinal flora. Adverse events will be recorded by monthly follow-up. Results The trial is expected to show that cognitive function can be improved by acupuncture and produce reliable clinical outcomes in MCI patients. It will also provide preliminary data on the possible mechanism based on the changes in the intestinal flora. Collected data will be used to support future large-scale fundamental studies. Conclusion Acupuncture is an effective method to improve cognitive function for MCI. This study will provide data on the relationship between gut microbiota and the effectiveness of acupuncture in patients with MCI from a new angle. Clinical trial registration [www.ClinicalTrials.gov], identifier [MR-33-22-002376].
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Affiliation(s)
- Yuanyuan Jin
- Department of Acupuncture and Moxibustion, Zhejiang Hospital, Hangzhou, China
| | - Fen Hu
- Department of Acupuncture and Moxibustion, Zhejiang Chinese Medical University, Hangzhou, China
| | - Jianfang Zhu
- Department of Acupuncture and Moxibustion, Zhejiang Hospital, Hangzhou, China
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