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Xie L, Pan L, Liu B, Cheng H, Mao X. Research progress on the association between trimethylamine/trimethylamine-N-oxide and neurological disorders. Postgrad Med J 2024; 100:283-288. [PMID: 38158712 DOI: 10.1093/postmj/qgad133] [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: 09/04/2023] [Revised: 11/26/2023] [Accepted: 12/02/2023] [Indexed: 01/03/2024]
Abstract
Trimethylamine-N-oxide (TMAO) is a common intestinal metabolite. The Choline in the nutrient forms TMA under the action of the gut microbiota, which passes through the liver and eventually forms TMAO. Initial studies of TMAO focused on cardiovascular disease, but as research progressed, TAMO's effects were found to be multisystem and closely related to the development of neurological diseases. Intestinal tract is the organ with the largest concentration of bacteria in human body, and the composition and metabolism of gut microbiota affect human health. As a two-way communication axis connecting the central nervous system and the gastrointestinal tract, the brain-gut axis provides the structural basis for TMAO to play its role. This article will review the correlation between TMA/TMAO and neurological diseases in order to find new directions and new targets for the treatment of neurological diseases.
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Affiliation(s)
- Lizheng Xie
- Department of Neurosurgery, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230022, China
| | - Li Pan
- Department of Neurosurgery, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230022, China
| | - Baiyun Liu
- Department of Neurosurgery, Beijing TianTan Hospital, Capital Medical University, Beijing, 100070, China
- Beijing Key Laboratory of Central Nervous System Injury, Beijing Neurosurgical Institute, Beijing, 100070, China
- China National Clinical Research Center for Neurological Diseases, Beijing, 100070, China
| | - Hongwei Cheng
- Department of Neurosurgery, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230022, China
| | - Xiang Mao
- Department of Neurosurgery, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230022, China
- Beijing Key Laboratory of Central Nervous System Injury, Beijing Neurosurgical Institute, Beijing, 100070, China
- China National Clinical Research Center for Neurological Diseases, Beijing, 100070, China
- Department of Neurosurgery, The First People's Hospital of Tianshui, Tian Shui, Gansu, 741000, China
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Dolkar P, Deyang T, Anand N, Rathipriya AG, Hediyal TA, Chandrasekaran V, Krishnamoorthy NK, Gorantla VR, Bishir M, Rashan L, Chang SL, Sakharkar MK, Yang J, Chidambaram SB. Trimethylamine-N-oxide and cerebral stroke risk: A review. Neurobiol Dis 2024; 192:106423. [PMID: 38286388 DOI: 10.1016/j.nbd.2024.106423] [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: 12/11/2023] [Revised: 01/18/2024] [Accepted: 01/25/2024] [Indexed: 01/31/2024] Open
Abstract
Trimethylamine-N-oxide (TMAO) is a gut microbiota-derived metabolite produced by the action of gut microbiota and the hepatic enzyme Flavin Mono‑oxygenase 3 (FMO3). TMAO level has a positive correlation with the risk of cardiovascular events, including stroke, and their level is influenced mainly by dietary choice and the action of liver enzyme FMO3. TMAO plays a role in the development of atherosclerosis plaque, which is one of the causative factors of the stroke event. Preclinical and clinical investigations on the TMAO and associated stroke risk, severity, and outcomes are summarised in this review. In addition, mechanisms of TMAO-driven vascular dysfunction are also discussed, such as inflammation, oxidative stress, thrombus and foam cell formation, altered cholesterol and bile acid metabolism, etc. Post-stroke inflammatory cascades involving activation of immune cells, i.e., microglia and astrocytes, result in Blood-brain-barrier (BBB) disruption, allowing TMAO to infiltrate the brain and further aggravate inflammation. This event occurs as a result of the activation of the NOD-like receptor family pyrin domain containing 3 (NLRP3) inflammasome pathway through the release of inflammatory cytokines and chemokines that further aggravate the BBB and initiate further recruitment of immune cells in the brain. Thus, it's likely that maintaining TMAO levels and associated gut microbiota could be a promising approach for treating and improving stroke complications.
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Affiliation(s)
- Phurbu Dolkar
- Department of Pharmacology, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Mysuru 570015, Karnataka, India
| | - Tenzin Deyang
- Department of Pharmacology, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Mysuru 570015, Karnataka, India
| | - Nikhilesh Anand
- Department of Pharmacology, American University of Antigua, College of Medicine, Saint John's, Po Box W-1451, Antigua and Barbuda
| | | | - Tousif Ahmed Hediyal
- Department of Pharmacology, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Mysuru 570015, Karnataka, India; Centre for Experimental Pharmacology and Toxicology, Central Animal Facility, JSS Academy of Higher Education & Research, Mysuru 570015, Karnataka, India
| | - Vichitra Chandrasekaran
- Department of Pharmacology, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Mysuru 570015, Karnataka, India; Centre for Experimental Pharmacology and Toxicology, Central Animal Facility, JSS Academy of Higher Education & Research, Mysuru 570015, Karnataka, India
| | - Naveen Kumar Krishnamoorthy
- Department of Pharmacology, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Mysuru 570015, Karnataka, India; Centre for Experimental Pharmacology and Toxicology, Central Animal Facility, JSS Academy of Higher Education & Research, Mysuru 570015, Karnataka, India
| | - Vasavi Rakesh Gorantla
- Department of Biomedical sciences, Research Faculty, West Virginia School of Osteopathic Medicine, Lewisburg, WV 24901, USA
| | - Muhammed Bishir
- Institute of NeuroImmune Pharmacology and Department of Biological Sciences, Seton Hall University, South Orange, New Jersey 07079, USA
| | - Luay Rashan
- Biodiversity Research Centre, Dohfar University, Salalah, Sultanate of Oman
| | - Sulie L Chang
- Institute of NeuroImmune Pharmacology and Department of Biological Sciences, Seton Hall University, South Orange, New Jersey 07079, USA
| | - Meena Kishore Sakharkar
- Drug discovery and Development Research Group, College of Pharmacy and Nutrition, University of Saskatchewan, Saskatoon, SK S7N 5E5, Canada
| | - Jian Yang
- Drug discovery and Development Research Group, College of Pharmacy and Nutrition, University of Saskatchewan, Saskatoon, SK S7N 5E5, Canada.
| | - Saravana Babu Chidambaram
- Department of Pharmacology, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Mysuru 570015, Karnataka, India; Centre for Experimental Pharmacology and Toxicology, Central Animal Facility, JSS Academy of Higher Education & Research, Mysuru 570015, Karnataka, India.
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Hu X, Ren H, Cao Y. The association between trimethylamine N-oxide levels and ischemic stroke occurrence: a meta-analysis and Mendelian randomization study. BMC Neurol 2023; 23:413. [PMID: 37990303 PMCID: PMC10662484 DOI: 10.1186/s12883-023-03458-2] [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: 09/18/2023] [Accepted: 11/07/2023] [Indexed: 11/23/2023] Open
Abstract
BACKGROUND Trimethylamine-N-oxide (TMAO), an intestinal microbiota-derived choline metabolite, has been found to be associated with ischemic stroke (IS) in more and more studies. However, the causal role of TMAO on IS occurrence remains perplexing. METHODS We comprehensively screened the related clinical studies on PubMed, Web of Science, and Embase. Case-control and cohort studies that reported the TMAO levels of both IS patients and healthy controls were included, and the risk of bias was assessed according to the criteria by the Centre for Evidence-Based Medicine in Oxford, UK. A meta-analysis of the retrieved publications was performed with a random-effect model to analyze the connection between TMAO levels and IS events. Besides, a Mendelian randomization (MR) analysis was performed to study the causal effect of TMAO on IS, with pooled data of TMAO and IS obtained from genome-wide association studies (GWAS). The following methods were used: MR-Egger, weighted median, inverse-variance weighted, simple mode, and weighted mode. The study has been registered in INPLASY (Registration number: INPLASY2023100027). RESULTS Eight cohort or case-control studies covering 2444 cases and 1707 controls were identified. The pooled data indicated that the IS patients tended to have higher TMAO levels compared with the controls (mean difference: 1.97 μM; 95% confidence interval [CI]: 0.87, 3.07; P = 0.0005), while distinctive heterogeneity (I2 = 96%, P < 0.00001) was observed. Sub-group analysis revealed that the heterogeneity of the studies might be derived from the studies themselves. However, no causal effect of TMAO on IS was observed (P > 0.05) in the Mendelian randomization analysis of this study. CONCLUSION We confirmed that IS patients tend to have higher TMAO levels than healthy individuals, while our findings of MR analysis did not support the causal role of TMAO in IS occurrence. Therefore, more studies are required for a better understanding of the relationship between TMAO levels and IS onset.
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Affiliation(s)
- Xinhua Hu
- Department of Neurology, People's Hospital of Xinjin District, Chengdu, China
| | - Haiyan Ren
- Department of Neurology, Shanghai Sixth People's Hospital Xuhui Branch Affiliated With Shanghai Jiao Tong University, Shanghai, China
| | - Yuan Cao
- Department of Neurology, People's Hospital of Xinjin District, Chengdu, China.
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Ge P, Duan H, Tao C, Niu S, Hu Y, Duan R, Shen A, Sun Y, Sun W. TMAO Promotes NLRP3 Inflammasome Activation of Microglia Aggravating Neurological Injury in Ischemic Stroke Through FTO/IGF2BP2. J Inflamm Res 2023; 16:3699-3714. [PMID: 37663757 PMCID: PMC10473438 DOI: 10.2147/jir.s399480] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Accepted: 08/19/2023] [Indexed: 09/05/2023] Open
Abstract
Objective Stroke is a kind of cerebrovascular disease with high mortality. TMAO has been shown to aggravate stroke outcomes, but its mechanism remains unclear. Materials and Methods Mice were fed with 0.12% TMAO for 16 weeks. Then, mice were made into MCAO/R models. Neurological score, infarct volume, neuronal damage and markers associated with inflammation were assessed. Since microglia played a crucial role in ischemic stroke, microglia of MCAO/R mice were isolated for high-throughput sequencing to identify the most differentially expressed gene following TMAO treatment. Afterward, the downstream pathways of TMAO were investigated using primary microglia. Results TMAO promoted the release of inflammatory cytokines in the brain of MCAO/R mice and promoted the activation of OGD/R microglial inflammasome, thereby exacerbating ischemic stroke outcomes. FTO/IGF2BP2 inhibited NLRP3 inflammasome activation in OGD/R microglia by downregulating the m6A level of NLRP3. TMAO can inhibit the expression of FTO and IGF2BP2, thus promoting the activation of NLRP3 inflammasome in OGD/R microglia. In conclusion, these results demonstrated that TMAO promotes NLRP3 inflammasome activation of microglia aggravating neurological injury in ischemic stroke through FTO/IGF2BP2. Conclusion Our results demonstrated that TMAO promotes NLRP3 inflammasome activation of microglia aggravating neurological injury in ischemic stroke through FTO/IGF2BP2. These findings explained the molecular mechanism of TMAO aggravating ischemic stroke in detail and provided molecular mechanism for clinical treatment.
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Affiliation(s)
- Pengxin Ge
- Department of Pharmacy, Anhui Provincial Cancer Hospital, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230031, People’s Republic of China
| | - Huijie Duan
- School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, 210009, People’s Republic of China
| | - Chunrong Tao
- Stroke Center and Department of Neurology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230001, People’s Republic of China
| | - Sensen Niu
- Digestive System Department, The Second Affiliated Hospital of Anhui Medical University, Hefei, 230601, People’s Republic of China
| | - Yiran Hu
- Department of Scientific Research, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230001, People’s Republic of China
| | - Rui Duan
- Department of Neurology, Nanjing First Hospital, Nanjing Medical University, Nanjing, 210006, People’s Republic of China
| | - Aizong Shen
- Department of Pharmacy, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230001, People’s Republic of China
| | - Yancai Sun
- Department of Pharmacy, Anhui Provincial Cancer Hospital, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230031, People’s Republic of China
| | - Wen Sun
- Stroke Center and Department of Neurology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230001, People’s Republic of China
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Han S, Cai L, Chen P, Kuang W. A study of the correlation between stroke and gut microbiota over the last 20years: a bibliometric analysis. Front Microbiol 2023; 14:1191758. [PMID: 37350780 PMCID: PMC10282156 DOI: 10.3389/fmicb.2023.1191758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Accepted: 05/19/2023] [Indexed: 06/24/2023] Open
Abstract
Purpose This study intends to uncover a more thorough knowledge structure, research hotspots, and future trends in the field by presenting an overview of the relationship between stroke and gut microbiota in the past two decades. Method Studies on stroke and gut microbiota correlations published between 1st January 2002 and 31st December 2021 were retrieved from the Web of Science Core Collection and then visualized and scientometrically analyzed using CiteSpace V. Results A total of 660 papers were included in the study, among which the United States, the United Kingdom, and Germany were the leading research centers. Cleveland Clinic, Southern Medical University, and Chinese Academy of Science were the top three institutions. The NATURE was the most frequently co-cited journal. STANLEY L HAZEN was the most published author, and Tang WHW was the most cited one. The co-occurrence analysis revealed eight clusters (i.e., brain-gut microbiota axis, fecal microbiome transplantation, gut microbiota, hypertension, TMAO, ischemic stroke, neuroinflammation, atopobiosis). "gut microbiota," "Escherichia coli," "cardiovascular disease," "risk," "disease," "ischemic stroke," "stroke," "metabolism," "inflammation," and "phosphatidylcholine" were the most recent keyword explosions. Conclusion Findings suggest that in the next 10 years, the number of publications produced annually may increase significantly. Future research trends tend to concentrate on the mechanisms of stroke and gut microbiota, with the inflammation and immunological mechanisms, TMAO, and fecal transplantation as hotspots. And the relationship between these mechanisms and a particular cardiovascular illness may also be a future research trend.
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Affiliation(s)
- Shengnan Han
- Clinical Medical College of Acupuncture, Moxibustion and Rehabilitation, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Longhui Cai
- First School of Medicine, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Peipei Chen
- School of Medical Technology, Qiqihar Medical College, Qiqihar, Heilongjiang, China
| | - Weihong Kuang
- Guangdong Key Laboratory for Research and Development of Natural Drugs, School of Pharmacy, Guangdong Medical University, Dongguan, 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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Zhang S, Jin M, Ren J, Sun X, Zhang Z, Luo Y, Sun X. New insight into gut microbiota and their metabolites in ischemic stroke: A promising therapeutic target. Biomed Pharmacother 2023; 162:114559. [PMID: 36989717 DOI: 10.1016/j.biopha.2023.114559] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Revised: 03/14/2023] [Accepted: 03/15/2023] [Indexed: 03/29/2023] Open
Abstract
The gut-brain axis has been shown to play a vital role in the prognosis and recovery of ischemic stroke (IS), which is associated with gut microbiota dysfunction and changes in the gastrointestinal system and epithelial barrier integrity. In turn, gut microbiota and its derived metabolites can influence stroke outcomes. In this review, we first describe the relationship between IS (clinical and experimental IS) and the gut microbiota. Second, we summarize the role and specific mechanisms of microbiota-derived metabolites in IS. Further, we discuss the roles of natural medicines targeting the gut microbiota. Finally, the potential use of the gut microbiota and derived metabolites as a promising therapeutic opportunity for stroke prevention, diagnosis, and treatment is explored.
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Zhou S, Liu J, Sun Y, Xu P, Liu JL, Sun S, Zhu B, Wu H. Dietary choline metabolite TMAO impairs cognitive function and induces hippocampal synaptic plasticity declining through the mTOR/P70S6K/4EBP1 pathway. Food Funct 2023; 14:2881-2895. [PMID: 36883968 DOI: 10.1039/d2fo03874a] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
Mild cognitive impairment (MCI) is an intermediate state between "healthy" and "dementia", which affects memory and cognitive function. Timely intervention and treatment of MCI can effectively prevent it from developing into an incurable neurodegenerative disease. Lifestyle factors, such as dietary habits, were highlighted as risk factors for MCI. The effect of a high-choline diet on cognitive function is contentious. In this study, we focus our attention on the choline metabolite trimethylamine-oxide (TMAO), an acknowledged pathogenic molecule of cardiovascular disease (CVD). With recent studies indicating that TMAO also plays a potential role in the central nervous system (CNS), we aim to explore the effect of TMAO on synaptic plasticity in the hippocampus, the basic structure of studying and memory. Using various hippocampal-dependent spatial references or working memory-related behavioral texts, we found that TMAO treatment caused both long-term memory (LTM) and short-term memory (STM) deficits in vivo. Simultaneously, the plasm and whole brain levels of choline and TMAO were measured by employing liquid phase mass spectrometry (LC/MS). Furthermore, the effects of TMAO on the hippocampus were further explored by applying Nissl staining and transmission electron microscopy (TEM). Moreover, the expression of synaptic plasticity-related proteins, including synaptophysin (SYN), postsynaptic density protein95 (PSD95), and N-methyl-aspartate receptor (NMDAR), was examined by western blotting and immunohistochemical (IHC). The results showed that TMAO treatment contributes to neuron loss, synapse ultrastructure alteration, and synaptic plasticity impairments. In mechanism, the mammalian target of rapamycin (mTOR) regulates synaptic function, and the activation of the mTOR signaling pathway was observed in TMAO groups. In conclusion, this study confirmed that the choline metabolite TMAO can induce hippocampal-dependent learning and memory ability impairment with synaptic plasticity deficits by activating the mTOR signaling pathway. The effects of choline metabolites on cognitive function may provide a theoretical basis for establishing the daily reference intakes (DRIs) of choline.
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Affiliation(s)
- Shihan Zhou
- College of Traditional Chinese Medicine and College of Integrated Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, China.
- Key Laboratory of Integrative Biomedicine for Brain Diseases, College of Traditional Chinese Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Jing Liu
- College of Traditional Chinese Medicine and College of Integrated Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, China.
- Key Laboratory of Integrative Biomedicine for Brain Diseases, College of Traditional Chinese Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Yan Sun
- College of Traditional Chinese Medicine and College of Integrated Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, China.
- Key Laboratory of Integrative Biomedicine for Brain Diseases, College of Traditional Chinese Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Ping Xu
- College of Traditional Chinese Medicine and College of Integrated Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, China.
- Key Laboratory of Integrative Biomedicine for Brain Diseases, College of Traditional Chinese Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Jin Ling Liu
- College of Traditional Chinese Medicine and College of Integrated Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, China.
- Key Laboratory of Integrative Biomedicine for Brain Diseases, College of Traditional Chinese Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Suping Sun
- College of Traditional Chinese Medicine and College of Integrated Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, China.
- Key Laboratory of Integrative Biomedicine for Brain Diseases, College of Traditional Chinese Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Boran Zhu
- College of Traditional Chinese Medicine and College of Integrated Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, China.
- Key Laboratory of Integrative Biomedicine for Brain Diseases, College of Traditional Chinese Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Haoxin Wu
- College of Traditional Chinese Medicine and College of Integrated Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, China.
- Key Laboratory of Integrative Biomedicine for Brain Diseases, College of Traditional Chinese Medicine, Nanjing University of Chinese Medicine, Nanjing, China
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Yin X, Liu B, Ding Y, Li X, Sheng J, Guo Y, Chen Z, Wen J. Total flavones of Rhododendron induce the transformation of A1/A2 astrocytes via promoting the release of CBS-produced H 2S. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2023; 111:154666. [PMID: 36701996 DOI: 10.1016/j.phymed.2023.154666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Revised: 12/29/2022] [Accepted: 01/10/2023] [Indexed: 06/17/2023]
Abstract
BACKGROUND We previously found that total flavones of Rhododendron (TFR) protected against the cerebral ischemia/reperfusion (I/R) injury. But the detailed mechanism is not clear. Recent research revealed that reactive astrocytes were divided into A1 and A2 phenotypes for their morphological and functional remodeling and neurotoxic- vs-neuroprotective effect on the injury of the central nervous system (CNS). PURPOSE The present study was undertaken to explore the role and mechanism of TFR on the phenotypic change of astrocytes following cerebral I/R in vivo and oxygen glucose deprivation/re-oxygenation (OGD/R) in vitro. STUDY DESIGN AND METHODS We tested the expression of astrocytes marker glial fibrillary acidic protein (GFAP), A1 astrocytes marker C3 protein and A2 astrocytes marker S100a10, as well as the BrdU/GFAP-positive cells, GFAP/S100a10-positive cells and GFAP/C3-positive cells in mice hippocampal tissues to evaluate the phenotypic change of astrocytes. Besides, we assessed the change of astrocyte phenotypes following OGD/R in vitro. RESULTS We found that mice cerebral I/R promoted the astrocytes proliferation of both A1 and A2 phenotypes in hippocampal tissues. While treatment with TFR could promote the proliferation of A2 astrocytes but inhibit the A1 astrocytes proliferation in mice hippocampal tissues, suggesting that TFR could accelerate the astrocytes transformation into A2 subtype following cerebral I/R. Whereas, in OGD/R model of astrocytes, we found that TFR inhibited the proliferation of both A1 and A2 astrocytes. Besides, we found that TFR could up-regulate the release of cystathionine β-synthase (CBS)-produced hydrogen sulfide (H2S) and inhibit RhoA/Rho kinase pathway, and revealed that the inhibitory effect of TFR on astrocytes proliferation could be blocked by aminooxyacetic acid (AOAA), an CBS inhibitor. Furthermore, TFR could ameliorate the mice cerebral I/R injury and the OGD/R-induced astrocytic damage. CONCLUSION These findings suggested that TFR could affect the transformation of astrocytes subtypes following cerebral I/R, which may be related to up-regulation of CBS-produced H2S and subsequent inhibition of RhoA/ROCK pathway.
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Affiliation(s)
- Xiaojiao Yin
- Department of Pharmacology, School of Basic Medical Sciences, Anhui Medical University, NO.81 Meishan Road, Hefei 230032, China
| | - Bo Liu
- Department of Pharmacology, School of Basic Medical Sciences, Anhui Medical University, NO.81 Meishan Road, Hefei 230032, China
| | - Yanyu Ding
- Department of Pharmacology, School of Basic Medical Sciences, Anhui Medical University, NO.81 Meishan Road, Hefei 230032, China
| | - Xueyan Li
- Department of Pharmacology, School of Basic Medical Sciences, Anhui Medical University, NO.81 Meishan Road, Hefei 230032, China
| | - Ju Sheng
- Department of Pharmacology, School of Basic Medical Sciences, Anhui Medical University, NO.81 Meishan Road, Hefei 230032, China
| | - Yan Guo
- Department of Pharmacology, School of Basic Medical Sciences, Anhui Medical University, NO.81 Meishan Road, Hefei 230032, China.
| | - Zhiwu Chen
- Department of Pharmacology, School of Basic Medical Sciences, Anhui Medical University, NO.81 Meishan Road, Hefei 230032, China.
| | - Jiyue Wen
- Department of Pharmacology, School of Basic Medical Sciences, Anhui Medical University, NO.81 Meishan Road, Hefei 230032, China.
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Liu Y, Qu J, Xu J, Gu A, Deng D, Jia X, Wang B. Trimethylamine-N-oxide: a potential biomarker and therapeutic target in ischemic stroke. Front Neurol 2023; 14:1156879. [PMID: 37153682 PMCID: PMC10160411 DOI: 10.3389/fneur.2023.1156879] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Accepted: 04/05/2023] [Indexed: 05/10/2023] Open
Abstract
Ischemic stroke is by far the most common cerebrovascular disease and a major burden to the global economy and public health. Trimethylamine-N-oxide (TMAO), a small molecule compound produced by the metabolism of intestinal microorganisms, is reportedly associated with the risk of stroke, as well as the severity and prognosis of stroke; however, this conclusion remains contentious. This article reviews the production of TMAO, TMAO's relationship with different etiological types of ischemic stroke, and the possibility of reducing TMAO levels to improve the prognosis of ischemic stroke.
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Affiliation(s)
- Yuan Liu
- Jiaxing University Master Degree Cultivation Base, Zhejiang Chinese Medical University, Jiaxing, China
| | - Juan Qu
- Department of Neurology, Affiliated Hospital of Jiaxing University, The First Hospital of Jiaxing, Jiaxing, China
| | - Junjie Xu
- Department of Neurology, Affiliated Hospital of Jiaxing University, The First Hospital of Jiaxing, Jiaxing, China
| | - Aiming Gu
- Department of Neurology, Affiliated Hospital of Jiaxing University, The First Hospital of Jiaxing, Jiaxing, China
| | - Dezhi Deng
- Department of Neurology, Affiliated Hospital of Jiaxing University, The First Hospital of Jiaxing, Jiaxing, China
| | - Xiaodan Jia
- Department of Neurology, Affiliated Hospital of Jiaxing University, The First Hospital of Jiaxing, Jiaxing, China
| | - Baoxiang Wang
- Department of Neurology, Affiliated Hospital of Jiaxing University, The First Hospital of Jiaxing, Jiaxing, China
- *Correspondence: Baoxiang Wang,
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Long J, Wang J, Li Y, Chen S. Gut microbiota in ischemic stroke: Where we stand and challenges ahead. Front Nutr 2022; 9:1008514. [DOI: 10.3389/fnut.2022.1008514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Accepted: 11/07/2022] [Indexed: 12/03/2022] Open
Abstract
Gut microbiota is increasingly recognized to affect host health and disease, including ischemic stroke (IS). Here, we systematically review the current understanding linking gut microbiota as well as the associated metabolites to the pathogenesis of IS (e.g., oxidative stress, apoptosis, and neuroinflammation). Of relevance, we highlight that the implications of gut microbiota-dependent intervention could be harnessed in orchestrating IS.
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Mudimela S, Vishwanath NK, Pillai A, Morales R, Marrelli SP, Barichello T, Giridharan VV. Clinical significance and potential role of trimethylamine N-oxide in neurological and neuropsychiatric disorders. Drug Discov Today 2022; 27:103334. [PMID: 35998800 PMCID: PMC10392962 DOI: 10.1016/j.drudis.2022.08.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Revised: 04/18/2022] [Accepted: 08/09/2022] [Indexed: 11/23/2022]
Abstract
In the past three decades, research on the gut microbiome and its metabolites, such as trimethylamines (TMA), trimethylamine N-oxide (TMAO), short-chain fatty acids (SCFAs), branched-chain amino acids (BCAAs), bile acids, tryptophan and indole derivatives, has attracted the attention of many scientists and industrialists. Among these metabolites, TMAO is produced from dietary choline, phosphatidylcholine, carnitine,andbetaine. TMAO and other gut metabolites, such as TMA and SCFAs, reach the brain by crossing the blood-brain barrier (BBB) and are involved in brain development, neurogenesis, and behavior. Gut-microbiota composition is influenced by diet, lifestyle, antibiotics, and age. Several studies have confirmed that altered TMAO levels contribute to metabolic, vascular, psychiatric, and neurodegenerative disorders. This review focuses on how altered TMAO levels impact oxidative stress, microglial activation, and the apoptosis of neurons, and may lead to neuroinflammation, which can subsequently result in the development of psychiatric, cognitive, and behavioral disorders.
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Affiliation(s)
- Sowjanya Mudimela
- Faculty of Pharmaceutical Sciences, PES University, HN-Campus, Bengaluru, Karnataka, India
| | | | - Anilkumar Pillai
- Pathophysiology of Neuropsychiatric Disorders Program, Faillace Department of Psychiatry and Behavioral Sciences, McGovern Medical School, The University of Texas Health Science Center at Houston (UTHealth), Houston, TX, USA; Neuroscience Graduate Program, The University of Texas MD Anderson Cancer Center at Houston (UTHealth), Houston, TX, USA; Research and Development, Charlie Norwood VA Medical Center, Augusta, GA, USA; Department of Psychiatry and Health Behavior, Medical College of Georgia, Augusta University, Augusta, GA, USA
| | - Rodrigo Morales
- Department of Neurology, McGovern Medical School, The University of Texas Health Science Center at Houston (UTHealth), Houston, TX, USA; Centro Integrativo de Biologia y Quimica Aplicada (CIBQA), Universidad Bernardo O'Higgins, Santiago, Chile
| | - Sean P Marrelli
- Department of Neurology, McGovern Medical School, The University of Texas Health Science Center at Houston (UTHealth), Houston, TX, USA
| | - Tatiana Barichello
- Neuroscience Graduate Program, The University of Texas MD Anderson Cancer Center at Houston (UTHealth), Houston, TX, USA; Faillace Department of Psychiatry and Behavioral Sciences, Translational Psychiatry Program, McGovern Medical School, The University of Texas Health Science Center at Houston (UTHealth), Houston, TX, USA; Experimental Physiopathology Laboratory, Graduate Program in Health Sciences, Graduate Program in Health Sciences, University of Southern Santa Catarina (UNESC), Criciúma, SC, Brazil
| | - Vijayasree V Giridharan
- Faillace Department of Psychiatry and Behavioral Sciences, Translational Psychiatry Program, McGovern Medical School, The University of Texas Health Science Center at Houston (UTHealth), Houston, TX, USA.
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13
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Wang J, Zhong Y, Zhu H, Mahgoub OK, Jian Z, Gu L, Xiong X. Different gender-derived gut microbiota influence stroke outcomes by mitigating inflammation. J Neuroinflammation 2022; 19:245. [PMID: 36195899 PMCID: PMC9531521 DOI: 10.1186/s12974-022-02606-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Accepted: 09/25/2022] [Indexed: 11/10/2022] Open
Abstract
Background and purpose Stroke is associated with high disability and mortality rates and increases the incidence of organ-related complications. Research has revealed that the outcomes and prognosis of stroke are regulated by the state of the intestinal microbiota. However, the possibility that the manipulation of the intestinal microbiota can alter sex-related stroke outcomes remain unknown. Methods To verify the different effects of microbiota from different sexes on stroke outcomes, we performed mouse fecal microbiota transplantation (FMT) and established a model of ischemic stroke. Male and female mice received either male or female microbiota through FMT. Ischemic stroke was triggered by MCAO (middle cerebral artery occlusion), and sham surgery served as a control. Over the next few weeks, the mice underwent neurological evaluation and metabolite and inflammatory level detection, and we collected fecal samples for 16S ribosomal RNA analysis. Results We found that when the female mice were not treated with FMT, the microbiota (especially the Firmicutes-to-Bacteroidetes ratio) and the levels of three main metabolites tended to resemble those of male mice after experimental stroke, indicating that stroke can induce an ecological imbalance in the biological community. Through intragastric administration, the gut microbiota of male and female mice was altered to resemble that of the other sex. In general, in female mice after MCAO, the survival rate was increased, the infarct area was reduced, behavioral test performance was improved, the release of beneficial metabolites was promoted and the level of inflammation was mitigated. In contrast, mice that received male microbiota were much more hampered in terms of protection against brain damage and the recovery of neurological function. Conclusion A female-like biological community reduces the level of systemic proinflammatory cytokines after ischemic stroke. Poor stroke outcomes can be positively modulated following supplementation with female gut microbiota.
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Affiliation(s)
- Jinchen Wang
- Department of Neurosurgery, Renmin Hospital of Wuhan University, 99 Zhang Zhidong Rd, Wuhan, 430060, Hubei, China.,Department of Anesthesiology, Zhujiang Hospital of Southern Medical University, Guangzhou, China
| | - Yi Zhong
- Department of Neurosurgery, Renmin Hospital of Wuhan University, 99 Zhang Zhidong Rd, Wuhan, 430060, Hubei, China
| | - Hua Zhu
- Department of Neurosurgery, Renmin Hospital of Wuhan University, 99 Zhang Zhidong Rd, Wuhan, 430060, Hubei, China
| | - Omer Kamal Mahgoub
- Department of Neurosurgery, Renmin Hospital of Wuhan University, 99 Zhang Zhidong Rd, Wuhan, 430060, Hubei, China
| | - Zhihong Jian
- Department of Neurosurgery, Renmin Hospital of Wuhan University, 99 Zhang Zhidong Rd, Wuhan, 430060, Hubei, China
| | - Lijuan Gu
- Central Laboratory, Renmin Hospital of Wuhan University, Wuhan, China.
| | - Xiaoxing Xiong
- Department of Neurosurgery, Renmin Hospital of Wuhan University, 99 Zhang Zhidong Rd, Wuhan, 430060, Hubei, China.
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14
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Wang M, Liu K, Bu H, Cong H, Dong G, Xu N, Li C, Zhao Y, Jiang F, Zhang Y, Yuan B, Li R, Jiang J. Purple sweet potato delphinidin-3-rutin represses glioma proliferation by inducing miR-20b-5p/Atg7-dependent cytostatic autophagy. Mol Ther Oncolytics 2022; 26:314-329. [PMID: 36090477 PMCID: PMC9420429 DOI: 10.1016/j.omto.2022.07.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Accepted: 07/22/2022] [Indexed: 10/26/2022] Open
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15
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Hoyles L, Pontifex MG, Rodriguez-Ramiro I, Anis-Alavi MA, Jelane KS, Snelling T, Solito E, Fonseca S, Carvalho AL, Carding SR, Müller M, Glen RC, Vauzour D, McArthur S. Regulation of blood-brain barrier integrity by microbiome-associated methylamines and cognition by trimethylamine N-oxide. MICROBIOME 2021; 9:235. [PMID: 34836554 PMCID: PMC8626999 DOI: 10.1186/s40168-021-01181-z] [Citation(s) in RCA: 69] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Accepted: 10/18/2021] [Indexed: 05/09/2023]
Abstract
BACKGROUND Communication between the gut microbiota and the brain is primarily mediated via soluble microbe-derived metabolites, but the details of this pathway remain poorly defined. Methylamines produced by microbial metabolism of dietary choline and L-carnitine have received attention due to their proposed association with vascular disease, but their effects upon the cerebrovascular circulation have hitherto not been studied. RESULTS Here, we use an integrated in vitro/in vivo approach to show that physiologically relevant concentrations of the dietary methylamine trimethylamine N-oxide (TMAO) enhanced blood-brain barrier (BBB) integrity and protected it from inflammatory insult, acting through the tight junction regulator annexin A1. In contrast, the TMAO precursor trimethylamine (TMA) impaired BBB function and disrupted tight junction integrity. Moreover, we show that long-term exposure to TMAO protects murine cognitive function from inflammatory challenge, acting to limit astrocyte and microglial reactivity in a brain region-specific manner. CONCLUSION Our findings demonstrate the mechanisms through which microbiome-associated methylamines directly interact with the mammalian BBB, with consequences for cerebrovascular and cognitive function. Video abstract.
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Affiliation(s)
- Lesley Hoyles
- Department of Biosciences, School of Science and Technology, Nottingham Trent University, Clifton, Nottingham, UK.
| | | | - Ildefonso Rodriguez-Ramiro
- Norwich Medical School, University of East Anglia, Norwich, UK
- Metabolic Syndrome Group, Madrid Institute for Advanced Studies (IMDEA) in Food, E28049, Madrid, Spain
| | - M Areeb Anis-Alavi
- Institute of Dentistry, Faculty of Medicine & Dentistry, Queen Mary University of London, London, UK
| | - Khadija S Jelane
- Institute of Dentistry, Faculty of Medicine & Dentistry, Queen Mary University of London, London, UK
| | - Tom Snelling
- Faculty of Medicine, Department of Metabolism, Digestion and Reproduction, Imperial College London, London, UK
| | - Egle Solito
- William Harvey Research Institute, Faculty of Medicine & Dentistry, Queen Mary University of London, London, UK
- Dipartimento di Medicina molecolare e Biotecnologie mediche, Federico II University, Naples, Italy
| | - Sonia Fonseca
- The Gut Microbes and Health Research Programme, The Quadram Institute, Norwich Research Park, Norwich, UK
| | - Ana L Carvalho
- The Gut Microbes and Health Research Programme, The Quadram Institute, Norwich Research Park, Norwich, UK
| | - Simon R Carding
- Norwich Medical School, University of East Anglia, Norwich, UK
- The Gut Microbes and Health Research Programme, The Quadram Institute, Norwich Research Park, Norwich, UK
| | - Michael Müller
- Norwich Medical School, University of East Anglia, Norwich, UK
| | - Robert C Glen
- Faculty of Medicine, Department of Metabolism, Digestion and Reproduction, Imperial College London, London, UK
- Centre for Molecular Informatics, Department of Chemistry, University of Cambridge, Cambridge, UK
| | - David Vauzour
- Norwich Medical School, University of East Anglia, Norwich, UK
| | - Simon McArthur
- Institute of Dentistry, Faculty of Medicine & Dentistry, Queen Mary University of London, London, UK.
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