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Sapienza J, Agostoni G, Comai S, Nasini S, Dall'Acqua S, Sut S, Spangaro M, Martini F, Bechi M, Buonocore M, Bigai G, Repaci F, Nocera D, Ave C, Guglielmino C, Cocchi F, Cavallaro R, Deste G, Bosia M. Neuroinflammation and kynurenines in schizophrenia: Impact on cognition depending on cognitive functioning and modulatory properties in relation to cognitive remediation and aerobic exercise. Schizophr Res Cogn 2024; 38:100328. [PMID: 39281320 PMCID: PMC11399803 DOI: 10.1016/j.scog.2024.100328] [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: 10/27/2023] [Revised: 08/26/2024] [Accepted: 08/26/2024] [Indexed: 09/18/2024]
Abstract
Background In the last decade, the kynurenine pathway (KP) has gained attention in the pathogenesis of cognitive impairment in schizophrenia being at the croassroad between neuroinflammation and glutamatergic and cholinergic neurotransmission. However, clinical findings are scarse and conflicting, and the specific contributions of these two systems to the neurobiology of cognitive symptoms are far from being elucidated. Furthermore, little is known about the molecular underpinnings of non-pharmacological interventions for cognitive improvement, including rehabilitation strategies. Methods The current study examined 72 patients with schizophrenia, divided in two clusters depending on the severity of the cognitive impairment, with the aim to evaluate the impact of inflammatory biomarkers and KP metabolites depending on cognitive functioning. Moreover, we studied their possible link to the cognitive outcome in relation to sessions of cognitive remediation therapy (CRT) and aerobic exercise (AE) in a longitudinal arm of 42 patients. Results Neuroinflammation appeared to exert a more pronounced influence on cognition in patients exhibiting a higher cognitive functioning, contrasting with the activation of the KP, which had a greater impact on individuals with a lower cognitive profile. Cognitive improvements after the treatments were negatively predicted by levels of TNF-α and positively predicted by the 3-hydroxykynurenine (3-HK)/kynurenine (KYN) ratio, an index of the kynurenine-3-monooxygenase (KMO) enzyme activity. Conclusion Overall, these findings add novel evidence on the biological underpinnings of cognitive impairment in schizophrenia pointing at a differential role of neuroinflammation and KP metabolites in inducing cognitive deficits depending on the cognitive reserve and predicting outcomes after rehabilitation.
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Affiliation(s)
- Jacopo Sapienza
- Department of Clinical Neurosciences, IRCCS San Raffaele Scientific Institute, Milan, Italy
- Department of Humanities and Life Sciences, University School for Advanced Studies IUSS, Pavia, Italy
| | - Giulia Agostoni
- Department of Clinical Neurosciences, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Stefano Comai
- Department of Pharmaceutical and Pharmacological Sciences, University of Padua, Padua, Italy
- Division of Neurosciences, IRCCS San Raffaele Scientific Institute, Milan, Italy
- Department of Psychiatry, McGill University, Montreal, QC, Canada
- Department of Biomedical Sciences, University of Padua, Padua, Italy
| | - Sofia Nasini
- Department of Pharmaceutical and Pharmacological Sciences, University of Padua, Padua, Italy
| | - Stefano Dall'Acqua
- Department of Pharmaceutical and Pharmacological Sciences, University of Padua, Padua, Italy
| | - Stefania Sut
- Department of Pharmaceutical and Pharmacological Sciences, University of Padua, Padua, Italy
| | - Marco Spangaro
- Department of Clinical Neurosciences, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Francesca Martini
- Department of Clinical Neurosciences, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Margherita Bechi
- Department of Clinical Neurosciences, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Mariachiara Buonocore
- Department of Clinical Neurosciences, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Giorgia Bigai
- School of Medicine, Vita -Salute San Raffaele University, Milan, Italy
| | - Federica Repaci
- Department of Clinical Neurosciences, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Daniela Nocera
- School of Medicine, Vita -Salute San Raffaele University, Milan, Italy
| | - Chiara Ave
- School of Medicine, Vita -Salute San Raffaele University, Milan, Italy
| | - Carmelo Guglielmino
- Department of Clinical Neurosciences, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Federica Cocchi
- Department of Clinical Neurosciences, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Roberto Cavallaro
- Department of Clinical Neurosciences, IRCCS San Raffaele Scientific Institute, Milan, Italy
- School of Medicine, Vita -Salute San Raffaele University, Milan, Italy
| | - Giacomo Deste
- Department of Mental Health, Spedali Civili Hospital, Brescia, Italy
| | - Marta Bosia
- Department of Clinical Neurosciences, IRCCS San Raffaele Scientific Institute, Milan, Italy
- School of Medicine, Vita -Salute San Raffaele University, Milan, Italy
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Wang XP, Yan D, Jin XP, Zhang WY, Shi T, Wang X, Song W, Xiong X, Guo D, Chen S. The role of amino acid metabolism alterations in acute ischemic stroke: From mechanism to application. Pharmacol Res 2024; 207:107313. [PMID: 39025169 DOI: 10.1016/j.phrs.2024.107313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2024] [Revised: 07/10/2024] [Accepted: 07/15/2024] [Indexed: 07/20/2024]
Abstract
Acute ischemic stroke (AIS) is the most prevalent type of stroke, and due to its high incidence, disability rate, and mortality rate, it imposes a significant burden on the health care system. Amino acids constitute one of the most crucial metabolic products within the human body, and alterations in their metabolic pathways have been identified in the microenvironment of AIS, thereby influencing the pathogenesis, severity, and prognosis of AIS. The amino acid metabolism characteristics in AIS are complex. On one hand, the dynamic progression of AIS continuously reshapes the amino acid metabolism pattern. Conversely, changes in the amino acid metabolism pattern also exert a double-edged effect on AIS. This interaction is bidirectional, dynamic, heterogeneous, and dose-specific. Therefore, the distinctive metabolic reprogramming features surrounding amino acids during the AIS process are systematically summarized in this paper, aiming to provide potential investigative strategies for the early diagnosis, treatment approaches, and prognostic enhancement of AIS.
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Affiliation(s)
- Xiang-Ping Wang
- First People's Hospital of Linping District; Linping Campus, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, 311100, China
| | - Dan Yan
- Affiliated Xiaoshan Hospital, Hangzhou Normal University, Hangzhou 311202, China
| | - Xia-Ping Jin
- First People's Hospital of Linping District; Linping Campus, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, 311100, China
| | - Wen-Yan Zhang
- First People's Hospital of Linping District; Linping Campus, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, 311100, China
| | - Tao Shi
- First People's Hospital of Linping District; Linping Campus, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, 311100, China
| | - Xiang Wang
- First People's Hospital of Linping District; Linping Campus, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, 311100, China
| | - Wenjuan Song
- First People's Hospital of Linping District; Linping Campus, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, 311100, China
| | - Xing Xiong
- Traditional Chinese Medical Hospital of Xiaoshan, The Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, Zhejiang Province 311200, China
| | - Duancheng Guo
- Cancer Institute, Fudan University Shanghai Cancer Center; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai 200032, China.
| | - Sheng Chen
- First People's Hospital of Xiaoshan District, Hangzhou, Zhejiang Province 311200, China.
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Dylla L, Higgins HM, Stephenson D, Reisz JA, Vu T, Poisson SN, Herson PS, Monte AA. Sex Differences in the Blood Metabolome During Acute Response to Ischemic Stroke. J Womens Health (Larchmt) 2024. [PMID: 38946610 DOI: 10.1089/jwh.2023.1133] [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] [Indexed: 07/02/2024] Open
Abstract
Introduction: Females suffer greater lifetime risk of stroke and greater morbidity and mortality from stroke compared with males. This study's objective was to identify differences in metabolomic profiling of females and males with stroke and which differences were associated with neurological outcome. Methods: Females and males with acute ischemic stroke enrolled in the Emergency Medicine Specimen Bank at a comprehensive stroke center provided whole blood samples upon arrival for mass spectrometry-based metabolomics. We used descriptive statistics to characterize the cohort. A linear regression model was fit for individual metabolites to determine differences in relative abundance between males and females while controlling for covariates (age, race/ethnicity, postmenopausal status, cardiovascular risk factors, depression, time between sample collection and last known well, and initial National Institutes of Health Stroke Scale [NIHSS] score). For each differentially expressed metabolite, a linear regression model was fit to determine the association between the metabolite and NIHSS at 24 hours after admission while controlling for the covariates and acute treatments. Results: After adjusting for covariates, eight metabolites differed in females and males with a stroke. These included amino acids or their metabolites (proline and tryptophan), nucleotides (guanosine diphosphate [GDP], and inosine-3',5'-cyclic monophosphate), citrate, dehydroascorbate, choline, and acylcarnitine-(5-OH). GDP and dehydroascorbate were significantly associated with 24-hour NIHSS (p = 0.0991). Conclusions: Few metabolites were differentially abundant in blood after a stroke when comparing females with males and controlling for confounders, but the interactions between biological sex and GDP, as well as biological sex and dehydroascorbate, were associated with 24-hour neurological function. This has important implications for future studies that evaluate the therapeutic potential of these metabolites in ischemic stroke.
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Affiliation(s)
- Layne Dylla
- Department of Emergency Medicine, University of Colorado School of Medicine, Aurora, Colorado, USA
| | - Hannah M Higgins
- Department of Emergency Medicine, University of Colorado School of Medicine, Aurora, Colorado, USA
| | - Daniel Stephenson
- Department of Biochemistry and Molecular Genetics, University of Colorado School of Medicine, Aurora, Colorado, USA
| | - Julie A Reisz
- Department of Biochemistry and Molecular Genetics, University of Colorado School of Medicine, Aurora, Colorado, USA
| | - Thao Vu
- Department of Biostatistics and Informatics, Colorado School of Public Health, Aurora, Colorado, USA
| | - Sharon N Poisson
- Department of Neurology, University of Colorado School of Medicine, Aurora, Colorado, USA
| | - Paco S Herson
- Department of Neurological Surgery, The Ohio State University, Columbus, Ohio, USA
| | - Andrew A Monte
- Department of Emergency Medicine, University of Colorado School of Medicine, Aurora, Colorado, USA
- Rocky Mountain Poisson and Drug Center, Denver Health, Denver, Colorado, USA
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Grishanova AY, Perepechaeva ML. Kynurenic Acid/AhR Signaling at the Junction of Inflammation and Cardiovascular Diseases. Int J Mol Sci 2024; 25:6933. [PMID: 39000041 PMCID: PMC11240928 DOI: 10.3390/ijms25136933] [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: 05/20/2024] [Revised: 06/14/2024] [Accepted: 06/21/2024] [Indexed: 07/14/2024] Open
Abstract
Persistent systemic chronic inflammatory conditions are linked with many pathologies, including cardiovascular diseases (CVDs), a leading cause of death across the globe. Among various risk factors, one of the new possible contributors to CVDs is the metabolism of essential amino acid tryptophan. Proinflammatory signals promote tryptophan metabolism via the kynurenine (KYN) pathway (KP), thereby resulting in the biosynthesis of several immunomodulatory metabolites whose biological effects are associated with the development of symptoms and progression of various inflammatory diseases. Some participants in the KP are agonists of aryl hydrocarbon receptor (AhR), a central player in a signaling pathway that, along with a regulatory influence on the metabolism of environmental xenobiotics, performs a key immunomodulatory function by triggering various cellular mechanisms with the participation of endogenous ligands to alleviate inflammation. An AhR ligand with moderate affinity is the central metabolite of the KP: KYN; one of the subsequent metabolites of KYN-kynurenic acid (KYNA)-is a more potent ligand of AhR. Understanding the role of AhR pathway-related metabolites of the KP that regulate inflammatory factors in cells of the cardiovascular system is interesting and important for achieving effective treatment of CVDs. The purpose of this review was to summarize the results of studies about the participation of the KP metabolite-KYNA-and of the AhR signaling pathway in the regulation of inflammation in pathological conditions of the heart and blood vessels and about the possible interaction of KYNA with AhR signaling in some CVDs.
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Affiliation(s)
| | - Maria L. Perepechaeva
- Institute of Molecular Biology and Biophysics, Federal Research Center of Fundamental and Translational Medicine, Timakova Str. 2, Novosibirsk 630060, Russia;
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Yan L, Wang WJ, Cheng T, Yang DR, Wang YJ, Wang YZ, Yang FZ, So KF, Zhang L. Hepatic kynurenic acid mediates phosphorylation of Nogo-A in the medial prefrontal cortex to regulate chronic stress-induced anxiety-like behaviors in mice. Acta Pharmacol Sin 2024:10.1038/s41401-024-01302-y. [PMID: 38811774 DOI: 10.1038/s41401-024-01302-y] [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: 03/11/2024] [Accepted: 04/29/2024] [Indexed: 05/31/2024] Open
Abstract
Exercise training effectively relieves anxiety disorders via modulating specific brain networks. The role of post-translational modification of proteins in this process, however, has been underappreciated. Here we performed a mouse study in which chronic restraint stress-induced anxiety-like behaviors can be attenuated by 14-day persistent treadmill exercise, in association with dramatic changes of protein phosphorylation patterns in the medial prefrontal cortex (mPFC). In particular, exercise was proposed to modulate the phosphorylation of Nogo-A protein, which drives the ras homolog family member A (RhoA)/ Rho-associated coiled-coil-containing protein kinases 1(ROCK1) signaling cascade. Further mechanistic studies found that liver-derived kynurenic acid (KYNA) can affect the kynurenine metabolism within the mPFC, to modulate this RhoA/ROCK1 pathway for conferring stress resilience. In sum, we proposed that circulating KYNA might mediate stress-induced anxiety-like behaviors via protein phosphorylation modification within the mPFC, and these findings shed more insights for the liver-brain communications in responding to both stress and physical exercise.
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Affiliation(s)
- Lan Yan
- Key Laboratory of CNS Regeneration (Ministry of Education), Guangdong-Hong Kong-Macau Institute of CNS Regeneration, Jinan University, Guangzhou, 510632, China
| | - Wen-Jing Wang
- Key Laboratory of CNS Regeneration (Ministry of Education), Guangdong-Hong Kong-Macau Institute of CNS Regeneration, Jinan University, Guangzhou, 510632, China
| | - Tong Cheng
- Key Laboratory of CNS Regeneration (Ministry of Education), Guangdong-Hong Kong-Macau Institute of CNS Regeneration, Jinan University, Guangzhou, 510632, China
- Department of Rehabilitation Sciences, Faculty of Health and Social Sciences, Hong Kong Polytechnic University, Hong Kong SAR, China
| | - Di-Ran Yang
- Key Laboratory of CNS Regeneration (Ministry of Education), Guangdong-Hong Kong-Macau Institute of CNS Regeneration, Jinan University, Guangzhou, 510632, China
| | - Ya-Jie Wang
- Key Laboratory of CNS Regeneration (Ministry of Education), Guangdong-Hong Kong-Macau Institute of CNS Regeneration, Jinan University, Guangzhou, 510632, China
| | - Yang-Ze Wang
- College of Life Science and Technology, Jinan University, Guangzhou, 510632, China
| | - Feng-Zhen Yang
- Key Laboratory of CNS Regeneration (Ministry of Education), Guangdong-Hong Kong-Macau Institute of CNS Regeneration, Jinan University, Guangzhou, 510632, China
| | - Kwok-Fai So
- Key Laboratory of CNS Regeneration (Ministry of Education), Guangdong-Hong Kong-Macau Institute of CNS Regeneration, Jinan University, Guangzhou, 510632, China.
- State Key Laboratory of Brain and Cognitive Science, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China.
- Neuroscience and Neurorehabilitation Institute, University of Health and Rehabilitation Sciences, Qingdao, 266114, China.
- Center for Exercise and Brain Science, School of Psychology, Shanghai University of Sport, Shanghai, 200438, China.
- The First Affiliated Hospital of Xinxiang Medical University, Xinxiang, 453003, China.
| | - Li Zhang
- Key Laboratory of CNS Regeneration (Ministry of Education), Guangdong-Hong Kong-Macau Institute of CNS Regeneration, Jinan University, Guangzhou, 510632, China.
- Neuroscience and Neurorehabilitation Institute, University of Health and Rehabilitation Sciences, Qingdao, 266114, China.
- Center for Exercise and Brain Science, School of Psychology, Shanghai University of Sport, Shanghai, 200438, China.
- The First Affiliated Hospital of Xinxiang Medical University, Xinxiang, 453003, China.
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Lu Q, Yu A, Pu J, Chen D, Zhong Y, Bai D, Yang L. Post-stroke cognitive impairment: exploring molecular mechanisms and omics biomarkers for early identification and intervention. Front Mol Neurosci 2024; 17:1375973. [PMID: 38845616 PMCID: PMC11153683 DOI: 10.3389/fnmol.2024.1375973] [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: 01/24/2024] [Accepted: 05/08/2024] [Indexed: 06/09/2024] Open
Abstract
Post-stroke cognitive impairment (PSCI) is a major stroke consequence that has a severe impact on patients' quality of life and survival rate. For this reason, it is especially crucial to identify and intervene early in high-risk groups during the acute phase of stroke. Currently, there are no reliable and efficient techniques for the early diagnosis, appropriate evaluation, or prognostication of PSCI. Instead, plenty of biomarkers in stroke patients have progressively been linked to cognitive impairment in recent years. High-throughput omics techniques that generate large amounts of data and process it to a high quality have been used to screen and identify biomarkers of PSCI in order to investigate the molecular mechanisms of the disease. These techniques include metabolomics, which explores dynamic changes in the organism, gut microbiomics, which studies host-microbe interactions, genomics, which elucidates deeper disease mechanisms, transcriptomics and proteomics, which describe gene expression and regulation. We looked through electronic databases like PubMed, the Cochrane Library, Embase, Web of Science, and common databases for each omics to find biomarkers that might be connected to the pathophysiology of PSCI. As all, we found 34 studies: 14 in the field of metabolomics, 5 in the field of gut microbiomics, 5 in the field of genomics, 4 in the field of transcriptomics, and 7 in the field of proteomics. We discovered that neuroinflammation, oxidative stress, and atherosclerosis may be the primary causes of PSCI development, and that metabolomics may play a role in the molecular mechanisms of PSCI. In this study, we summarized the existing issues across omics technologies and discuss the latest discoveries of PSCI biomarkers in the context of omics, with the goal of investigating the molecular causes of post-stroke cognitive impairment. We also discuss the potential therapeutic utility of omics platforms for PSCI mechanisms, diagnosis, and intervention in order to promote the area's advancement towards precision PSCI treatment.
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Affiliation(s)
- Qiuyi Lu
- Department of Rehabilitation, The First Affiliated Hospital of Chongqing Medical University, Chonging, China
| | - Anqi Yu
- Department of Rehabilitation, The First Affiliated Hospital of Chongqing Medical University, Chonging, China
| | - Juncai Pu
- Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chonging, China
| | - Dawei Chen
- Department of Rehabilitation, The First Affiliated Hospital of Chongqing Medical University, Chonging, China
| | - Yujie Zhong
- Department of Rehabilitation, The First Affiliated Hospital of Chongqing Medical University, Chonging, China
| | - Dingqun Bai
- Department of Rehabilitation, The First Affiliated Hospital of Chongqing Medical University, Chonging, China
| | - Lining Yang
- Department of Rehabilitation, The First Affiliated Hospital of Chongqing Medical University, Chonging, China
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Sandvig HV, Aam S, Alme KN, Lydersen S, Magne Ueland P, Ulvik A, Wethal T, Saltvedt I, Knapskog AB. Neopterin, kynurenine metabolites, and indexes related to vitamin B6 are associated with post-stroke cognitive impairment: The Nor-COAST study. Brain Behav Immun 2024; 118:167-177. [PMID: 38428649 DOI: 10.1016/j.bbi.2024.02.030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Revised: 01/24/2024] [Accepted: 02/27/2024] [Indexed: 03/03/2024] Open
Abstract
BACKGROUND AND AIMS We have previously shown that systemic inflammation was associated with post-stroke cognitive impairment (PSCI). Because neopterin, kynurenine pathway (KP) metabolites, and B6 vitamers are linked to inflammation, in our study we investigated whether those biomarkers were associated with PSCI. MATERIAL AND METHODS The Norwegian Cognitive Impairment After Stroke study is a prospective multicenter cohort study of patients with acute stroke recruited from May 2015 through March 2017. Plasma samples of 422 participants (59 % male) with ischemic stroke from the index hospital stay and 3 months post-stroke were available for analyses of neopterin, KP metabolites, and B6 vitamers using liquid chromatography-tandem mass spectrometry. Mixed linear regression analyses adjusted for age, sex, and creatinine, were used to assess whether there were associations between those biomarkers and cognitive outcomes, measured by the Montreal Cognitive Assessment scale (MoCA) at 3-, 18-, and 36-month follow-up. RESULTS Participants had a mean (SD) age of 72 (12) years, with a mean (SD) National Institutes of HealthStroke Scale score of 2.7 (3.6) at Day 1. Higher baseline values of quinolinic acid, PAr (i.e., an inflammatory marker based on vitamin B6 metabolites), and HKr (i.e., a marker of functional vitamin B6 status based on selected KP metabolites) were associated with lower MoCA score at 3, 18, and 36 months post-stroke (p < 0.01). Higher baseline concentrations of neopterin and 3-hydroxykynurenine were associated with lower MoCA scores at 18 and 36 months, and higher concentrations of xanthurenic acid were associated with higher MoCA score at 36 months (p < 0.01). At 3 months post-stroke, higher concentrations of neopterin and lower values of pyridoxal 5́-phosphate were associated with lower MoCA scores at 18- and 36-month follow-up, while lower concentrations of picolinic acid were associated with a lower MoCA score at 36 months (p < 0.01). CONCLUSION Biomarkers and metabolites of systemic inflammation, including biomarkers of cellular immune activation, indexes of vitamin B6 homeostasis, and several neuroactive metabolites of the KP pathway, were associated with PSCI. TRIAL REGISTRATION ClinicalTrials.gov: NCT02650531.
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Affiliation(s)
- Heidi Vihovde Sandvig
- Department of Medicine, Kristiansund Hospital, Møre og Romsdal Hospital Trust, Kristiansund, Norway; Department of Neuromedicine and Movement Science, Faculty of Medicine and Health Science, Norwegian University of Science and Technology, Trondheim, Norway.
| | - Stina Aam
- Department of Neuromedicine and Movement Science, Faculty of Medicine and Health Science, Norwegian University of Science and Technology, Trondheim, Norway; Department of Geriatric Medicine, Clinic of Medicine, St. Olavs Hospital, Trondheim University Hospital, Trondheim, Norway
| | - Katinka N Alme
- Department of Internal Medicine, Haraldsplass Deaconess Hospital, Bergen, Norway
| | - Stian Lydersen
- Department of Mental Health, Faculty of Medicine and Health Science, Norwegian University of Science and Technology, Trondheim, Norway
| | | | - Arve Ulvik
- Bevital A/S, Laboratoriebygget, 5021 Bergen, Norway
| | - Torgeir Wethal
- Department of Neuromedicine and Movement Science, Faculty of Medicine and Health Science, Norwegian University of Science and Technology, Trondheim, Norway; Department of Stroke, Clinic of Medicine, St. Olavs Hospital, Trondheim University Hospital, Trondheim, Norway
| | - Ingvild Saltvedt
- Department of Neuromedicine and Movement Science, Faculty of Medicine and Health Science, Norwegian University of Science and Technology, Trondheim, Norway; Department of Geriatric Medicine, Clinic of Medicine, St. Olavs Hospital, Trondheim University Hospital, Trondheim, Norway
| | - Anne-Brita Knapskog
- Department of Geriatric Medicine, Oslo University Hospital, Ullevaal, Oslo, Norway
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Abad C, Karahoda R, Orbisova A, Kastner P, Heblik D, Kucera R, Portillo R, Staud F. Pathological shifts in tryptophan metabolism in human term placenta exposed to LPS or poly I:C†. Biol Reprod 2024; 110:722-738. [PMID: 38145492 PMCID: PMC11017130 DOI: 10.1093/biolre/ioad181] [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: 08/16/2023] [Revised: 10/25/2023] [Accepted: 12/18/2023] [Indexed: 12/27/2023] Open
Abstract
Maternal immune activation during pregnancy is a risk factor for offspring neuropsychiatric disorders. Among the mechanistic pathways by which maternal inflammation can affect fetal brain development and programming, those involving tryptophan (TRP) metabolism have drawn attention because various TRP metabolites have neuroactive properties. This study evaluates the effect of bacterial (lipopolysaccharides/LPS) and viral (polyinosinic:polycytidylic acid/poly I:C) placental infection on TRP metabolism using an ex vivo model. Human placenta explants were exposed to LPS or poly I:C, and the release of TRP metabolites was analyzed together with the expression of related genes and proteins and the functional activity of key enzymes in TRP metabolism. The rate-limiting enzyme in the serotonin pathway, tryptophan hydroxylase, showed reduced expression and functional activity in explants exposed to LPS or poly I:C. Conversely, the rate-limiting enzyme in the kynurenine pathway, indoleamine dioxygenase, exhibited increased activity, gene, and protein expression, suggesting that placental infection mainly promotes TRP metabolism via the kynurenine (KYN) pathway. Furthermore, we observed that treatment with LPS or poly I:C increased activity in the kynurenine monooxygenase branch of the KYN pathway. We conclude that placental infection impairs TRP homeostasis, resulting in decreased production of serotonin and an imbalance in the ratio between quinolinic acid and kynurenic acid. This disrupted homeostasis may eventually expose the fetus to suboptimal/toxic levels of neuroactive molecules and impair fetal brain development.
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Affiliation(s)
- Cilia Abad
- Department of Pharmacology and Toxicology, Faculty of Pharmacy in Hradec Kralove, Charles University, Hradec Kralove, Czech Republic
| | - Rona Karahoda
- Department of Pharmacology and Toxicology, Faculty of Pharmacy in Hradec Kralove, Charles University, Hradec Kralove, Czech Republic
| | - Anna Orbisova
- Department of Pharmacology and Toxicology, Faculty of Pharmacy in Hradec Kralove, Charles University, Hradec Kralove, Czech Republic
| | - Petr Kastner
- Department of Pharmaceutical Chemistry and Pharmaceutical Analysis, Faculty of Pharmacy in Hradec Kralove, Charles University, Hradec Kralove, Czech Republic
| | - Daniel Heblik
- Department of Pharmaceutical Chemistry and Pharmaceutical Analysis, Faculty of Pharmacy in Hradec Kralove, Charles University, Hradec Kralove, Czech Republic
| | - Radim Kucera
- Department of Pharmaceutical Chemistry and Pharmaceutical Analysis, Faculty of Pharmacy in Hradec Kralove, Charles University, Hradec Kralove, Czech Republic
| | - Ramon Portillo
- Department of Pharmacology and Toxicology, Faculty of Pharmacy in Hradec Kralove, Charles University, Hradec Kralove, Czech Republic
| | - Frantisek Staud
- Department of Pharmacology and Toxicology, Faculty of Pharmacy in Hradec Kralove, Charles University, Hradec Kralove, Czech Republic
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Chen W, Tian Y, Gou M, Wang L, Tong J, Zhou Y, Feng W, Li Y, Chen S, Liu Y, Wang Z, Pan S, Zhang P, Huang J, Yang X, Li CSR, Tian L, Hong LE, Tan Y. Role of the immune-kynurenine pathway in treatment-resistant schizophrenia. Prog Neuropsychopharmacol Biol Psychiatry 2024; 130:110926. [PMID: 38147973 DOI: 10.1016/j.pnpbp.2023.110926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 12/18/2023] [Accepted: 12/22/2023] [Indexed: 12/28/2023]
Abstract
BACKGROUND The immune-inflammatory response system (IRS) and kynurenine pathway (KP) have been implicated in the pathophysiology of schizophrenia. Studies have shown inflammation-related effects on KP metabolism in patients with schizophrenia. This study investigated the relationship between KP metabolites, IRS, and the compensatory immune-regulatory reflex system (CIRS) in patients with treatment-resistant schizophrenia (TRS). METHODS Patients with (n = 53) and without TRS (n = 47), and healthy controls (HCs, n = 49) were enrolled. We quantified plasma levels of pro-inflammatory cytokines (interleukin [IL]-1β, IL-2, IL-6, soluble(s)IL-6 receptor, IL-8, IL-12, IL-17, IL-18, interferon-γ, and tumor necrosis factor[TNF]-α) and anti-inflammatory cytokines (IL-1 receptor antagonist, IL-4, IL-10, tumor growth factor [TGF]-β1, TGF-β2, soluble (s) IL-2 receptor subunit α, sIL-2 receptor subunit β, and sTNF-α receptor 1) and calculated the IRS/CIRS ratio. We also tested serum metabolites of the KP, including kynurenine (KYN), kynurenic acid (KYNA), and quinolinic acid (QUIN), along with the QUIN/KYNA ratio. RESULTS Patients with TRS had significantly higher IRS/CIRS ratio than non-TRS patients (p = 0.002) and HCs (p = 0.007), and significantly lower KYN (p = 0.001) and KYNA (p = 0.01) levels than HCs. Binary logistic regression analysis revealed that a younger age at illness onset (odds ratio [OR] = 0.91, p = 0.02) and a higher IRS/CIRS ratio (OR = 1.22; p = 0.007) were risk factors for patients with TRS. After further adjusted for age of onset, the QUIN/KYNA ratio (β = 0.97; p = 0.02) significantly moderated the relationship between IRS/CIRS and TRS, showing that in the higher QUIN/KYNA condition, higher IRS/CIRS ratio were significantly and more likely to be associated with patients with TRS (β = 0.12, z = 3.19, p = 0.001), whereas in the low QUIN/KYNA condition, the association between IRS/CIRS ratio and TRS was weak and insignificant. CONCLUSIONS The peripheral immune response was imbalanced in TRS and was preferentially directed towards the IRS compared to patients without TRS and healthy controls, which is likely to play a role in neurotoxicity. Additionally, peripheral KP activation was also imbalanced, as evidenced by significantly reduced KYN and KYNA levels in patients with TRS compared to healthy controls, but none of KP metabolisms were significantly difference in non-TRS patients compared to healthy controls. QUIN/KYNA ratio involving to the degree of activation of NMDA receptors, indicated the neurotoxic level of the KP activation. The interaction between IRS/CIRS and QUIN/KYNA ratio was significant in predicting TRS, and our findings suggest a potential role for the immune-kynurenine pathway in TRS pathogenesis.
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Affiliation(s)
- Wenjin Chen
- Peking University HuiLongGuan Clinical Medical School, Beijing Huilongguan Hospital, Beijing, China
| | - Yichang Tian
- Department of Human Reproductive Medicine, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, Beijing, China; Beijing Maternal and Child Health Care Hospital, Beijing, China
| | - Mengzhuang Gou
- Peking University HuiLongGuan Clinical Medical School, Beijing Huilongguan Hospital, Beijing, China
| | - Leilei Wang
- Peking University HuiLongGuan Clinical Medical School, Beijing Huilongguan Hospital, Beijing, China
| | - Jinghui Tong
- Peking University HuiLongGuan Clinical Medical School, Beijing Huilongguan Hospital, Beijing, China
| | - Yanfang Zhou
- Peking University HuiLongGuan Clinical Medical School, Beijing Huilongguan Hospital, Beijing, China
| | - Wei Feng
- Peking University HuiLongGuan Clinical Medical School, Beijing Huilongguan Hospital, Beijing, China
| | - Yanli Li
- Peking University HuiLongGuan Clinical Medical School, Beijing Huilongguan Hospital, Beijing, China
| | - Song Chen
- Peking University HuiLongGuan Clinical Medical School, Beijing Huilongguan Hospital, Beijing, China
| | - Yongchang Liu
- Peking University HuiLongGuan Clinical Medical School, Beijing Huilongguan Hospital, Beijing, China
| | - Zhiren Wang
- Peking University HuiLongGuan Clinical Medical School, Beijing Huilongguan Hospital, Beijing, China
| | - Shujuan Pan
- Peking University HuiLongGuan Clinical Medical School, Beijing Huilongguan Hospital, Beijing, China
| | - Ping Zhang
- Peking University HuiLongGuan Clinical Medical School, Beijing Huilongguan Hospital, Beijing, China
| | - Junchao Huang
- Peking University HuiLongGuan Clinical Medical School, Beijing Huilongguan Hospital, Beijing, China
| | - Xiaokui Yang
- Department of Human Reproductive Medicine, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, Beijing, China; Beijing Maternal and Child Health Care Hospital, Beijing, China
| | - Chiang-Shan R Li
- Department of Psychiatry, Yale University School of Medicine, New Haven, CT, USA
| | - Li Tian
- Institute of Biomedicine and Translational Medicine, Department of Physiology, Faculty of Medicine, University of Tartu, Tartu, Estonia
| | - L Elliot Hong
- Department of Psychiatry and Behavioral Sciences, University of Texas Health Science Center, Houston, TX 77030, USA
| | - Yunlong Tan
- Peking University HuiLongGuan Clinical Medical School, Beijing Huilongguan Hospital, Beijing, China.
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10
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Yu H, Zheng B, Zhang Y, Chu M, Shu X, Wang X, Wang H, Zhou S, Cao M, Wen S, Chen J. Activation changes in patients with post-stroke cognitive impairment receiving intermittent theta burst stimulation: A functional near-infrared spectroscopy study. NeuroRehabilitation 2024; 54:677-690. [PMID: 38905062 PMCID: PMC11307044 DOI: 10.3233/nre-240068] [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: 03/24/2024] [Accepted: 05/05/2024] [Indexed: 06/23/2024]
Abstract
BACKGROUND Intermittent theta burst stimulation (iTBS) has demonstrated efficacy in patients with cognitive impairment. However, activation patterns and mechanisms of iTBS for post-stroke cognitive impairment (PSCI) remain insufficiently understood. OBJECTIVE To investigate the activation patterns and potential benefits of using iTBS in patients with PSCI. METHODS A total of forty-four patients with PSCI were enrolled and divided into an iTBS group (iTBS and cognitive training) or a control group (cognitive training alone). Outcomes were assessed based on the activation in functional near-infrared spectroscopy (fNIRS), as well as Loewenstein Occupational Therapy Cognitive Assessment (LOTCA) and the modified Barthel Index (MBI). RESULTS Thirty-eight patients completed the interventions and assessments. Increased cortical activation was observed in the iTBS group after the interventions, including the right superior temporal gyrus (STG), left frontopolar cortex (FPC) and left orbitofrontal cortex (OFC). Both groups showed significant improvements in LOTCA and MBI after the interventions (p < 0.05). Furthermore, the iTBS group augmented superior improvement in the total score of MBI and LOTCA compared to the control group, especially in visuomotor organization and thinking operations (p < 0.05). CONCLUSION iTBS altered activation patterns and improved cognitive function in patients with PSCI. The activation induced by iTBS may contribute to the improvement of cognitive function.
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Affiliation(s)
- Hong Yu
- Zhejiang Rehabilitation Medical Center (The Affiliated Rehabilitation Hospital of Zhejiang Chinese Medical University), Hangzhou, China
| | - Beisi Zheng
- The Third Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, China
| | - Youmei Zhang
- The Third Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, China
| | - Minmin Chu
- The Seconditions Hospital of Anhui Medical University, Hefei, China
| | - Xinxin Shu
- Zhejiang Rehabilitation Medical Center (The Affiliated Rehabilitation Hospital of Zhejiang Chinese Medical University), Hangzhou, China
| | - Xiaojun Wang
- Zhejiang Rehabilitation Medical Center (The Affiliated Rehabilitation Hospital of Zhejiang Chinese Medical University), Hangzhou, China
| | - Hani Wang
- Zhejiang Rehabilitation Medical Center (The Affiliated Rehabilitation Hospital of Zhejiang Chinese Medical University), Hangzhou, China
| | - Siwei Zhou
- Zhejiang Rehabilitation Medical Center (The Affiliated Rehabilitation Hospital of Zhejiang Chinese Medical University), Hangzhou, China
| | - Manting Cao
- The Third Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, China
| | - Shilin Wen
- The Third Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, China
| | - Jianer Chen
- Zhejiang Rehabilitation Medical Center (The Affiliated Rehabilitation Hospital of Zhejiang Chinese Medical University), Hangzhou, China
- The Third Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, China
- The Third Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, China
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11
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Zhang YY, Peng JJ, Chen D, Liu HQ, Yao BF, Peng J, Luo XJ. Telaprevir Improves Memory and Cognition in Mice Suffering Ischemic Stroke via Targeting MALT1-Mediated Calcium Overload and Necroptosis. ACS Chem Neurosci 2023; 14:3113-3124. [PMID: 37559405 DOI: 10.1021/acschemneuro.3c00250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/11/2023] Open
Abstract
Mucosa-associated lymphoid tissue lymphoma translocation protein 1 (MALT1) has been confirmed to contribute to brain injury in ischemic stroke via promoting excitotoxicity and necroptosis. Telaprevir, a hepatitis C virus protease inhibitor, is predicted to be a potential MALT1 inhibitor. Here, we showed that telaprevir protected against cerebral ischemic injury via inhibiting MALT1, thereby preventing glutamate receptor ionotropic NMDA 2B (GluN2B) activation, limiting calcium overload, and suppressing necroptosis. In ischemic stroke mice, telaprevir reduced infarct volume, improved the long-term survival rate, and enhanced sensorimotor, memory, and cognitive functions. In hypoxia-treated nerve cells, telaprevir decreased the intracellular calcium concentrations and reduced LDH release. Mechanistically, telaprevir inhibited MALT1 protease activity, thus decreasing the membrane protein level of GluN2B and its phosphorylation through reducing the level of STEP61. Moreover, telaprevir was able to inhibit the levels of necroptosis-associated proteins. According to these results, it can be concluded that telaprevir alleviates neuronal brain injury in stroke mice via restraining GluN2B activation and suppresses the receptor-interacting protein kinase 1 (RIPK1)/receptor-interacting protein kinase 3 (RIPK3)/mixed lineage kinase domain-like pseudokinase (MLKL) pathway through inhibiting MALT1. Thus, telaprevir might have a novel indication for treating patients with ischemic stroke.
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Affiliation(s)
- Yi-Yue Zhang
- Department of Pharmacology, Xiangya School of Pharmaceutical Sciences, Central South University, Changsha 410078, China
- Hunan Provincial Key Laboratory of Cardiovascular Research, Xiangya School of Pharmaceutical Sciences, Central South University, Changsha 410078, China
| | - Jing-Jie Peng
- Department of Laboratory Medicine, The Third Xiangya Hospital of Central South University, Changsha 410013, China
| | - Di Chen
- Department of Pharmacology, Xiangya School of Pharmaceutical Sciences, Central South University, Changsha 410078, China
- Hunan Provincial Key Laboratory of Cardiovascular Research, Xiangya School of Pharmaceutical Sciences, Central South University, Changsha 410078, China
| | - Hui-Qi Liu
- Department of Laboratory Medicine, The Third Xiangya Hospital of Central South University, Changsha 410013, China
| | - Bi-Feng Yao
- Department of Pharmacology, Xiangya School of Pharmaceutical Sciences, Central South University, Changsha 410078, China
- Hunan Provincial Key Laboratory of Cardiovascular Research, Xiangya School of Pharmaceutical Sciences, Central South University, Changsha 410078, China
| | - Jun Peng
- Department of Pharmacology, Xiangya School of Pharmaceutical Sciences, Central South University, Changsha 410078, China
- Hunan Provincial Key Laboratory of Cardiovascular Research, Xiangya School of Pharmaceutical Sciences, Central South University, Changsha 410078, China
| | - Xiu-Ju Luo
- Department of Laboratory Medicine, The Third Xiangya Hospital of Central South University, Changsha 410013, China
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12
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Bigelman E, Pasmanik-Chor M, Dassa B, Itkin M, Malitsky S, Dorot O, Pichinuk E, Kleinberg Y, Keren G, Entin-Meer M. Kynurenic acid, a key L-tryptophan-derived metabolite, protects the heart from an ischemic damage. PLoS One 2023; 18:e0275550. [PMID: 37616231 PMCID: PMC10449225 DOI: 10.1371/journal.pone.0275550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Accepted: 06/20/2023] [Indexed: 08/26/2023] Open
Abstract
BACKGROUND Renal injury induces major changes in plasma and cardiac metabolites. Using a small- animal in vivo model, we sought to identify a key metabolite whose levels are significantly modified following an acute kidney injury (AKI) and to analyze whether this agent could offer cardiac protection once an ischemic event has occurred. METHODS AND RESULTS Metabolomics profiling of cardiac lysates and plasma samples derived from rats that underwent AKI 1 or 7 days earlier by 5/6 nephrectomy versus sham-operated controls was performed. We detected 26 differential metabolites in both heart and plasma samples at the two selected time points, relative to sham. Out of which, kynurenic acid (kynurenate, KYNA) seemed most relevant. Interestingly, KYNA given at 10 mM concentration significantly rescued the viability of H9C2 cardiac myoblast cells grown under anoxic conditions and largely increased their mitochondrial content and activity as determined by flow cytometry and cell staining with MitoTracker dyes. Moreover, KYNA diluted in the drinking water of animals induced with an acute myocardial infarction, highly enhanced their cardiac recovery according to echocardiography and histopathology. CONCLUSION KYNA may represent a key metabolite absorbed by the heart following AKI as part of a compensatory mechanism aiming at preserving the cardiac function. KYNA preserves the in vitro myocyte viability following exposure to anoxia in a mechanism that is mediated, at least in part, by protection of the cardiac mitochondria. A short-term administration of KYNA may be highly beneficial in the treatment of the acute phase of kidney disease in order to attenuate progression to reno-cardiac syndrom and to reduce the ischemic myocardial damage following an ischemic event.
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Affiliation(s)
- Einat Bigelman
- Laboratory of Cardiovascular Research, Tel Aviv Sourasky Medical Center, Affiliated with the Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
- Department of Cardiology, Sackler School of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - Metsada Pasmanik-Chor
- Bioinformatics Unit, Faculty of Life Sciences, Tel-Aviv University, Tel-Aviv, Israel
| | - Bareket Dassa
- Bioinformatics Unit, Department of Life Sciences Core Facilities, Weizmann Institute of Science, Rehovot, Israel
| | - Maxim Itkin
- Metabolic Profiling Unit, Life Sciences Core Facilities, Weizmann Institute of Science, Rehovot, Israel
| | - Sergey Malitsky
- Metabolic Profiling Unit, Life Sciences Core Facilities, Weizmann Institute of Science, Rehovot, Israel
| | - Orly Dorot
- Bio-Imaging Core, Blavatnik Center for Drug Discovery, Tel-Aviv University, Tel-Aviv, Israel
| | - Edward Pichinuk
- Bio-Imaging Core, Blavatnik Center for Drug Discovery, Tel-Aviv University, Tel-Aviv, Israel
| | - Yuval Kleinberg
- Laboratory of Cardiovascular Research, Tel Aviv Sourasky Medical Center, Affiliated with the Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
- Bio-Imaging Core, Blavatnik Center for Drug Discovery, Tel-Aviv University, Tel-Aviv, Israel
| | - Gad Keren
- Laboratory of Cardiovascular Research, Tel Aviv Sourasky Medical Center, Affiliated with the Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
- Department of Cardiology, Sackler School of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - Michal Entin-Meer
- Laboratory of Cardiovascular Research, Tel Aviv Sourasky Medical Center, Affiliated with the Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
- Department of Cardiology, Sackler School of Medicine, Tel-Aviv University, Tel-Aviv, Israel
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13
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Kynurenine Pathway in Diabetes Mellitus-Novel Pharmacological Target? Cells 2023; 12:cells12030460. [PMID: 36766803 PMCID: PMC9913876 DOI: 10.3390/cells12030460] [Citation(s) in RCA: 24] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 01/24/2023] [Accepted: 01/27/2023] [Indexed: 02/04/2023] Open
Abstract
The tryptophan-kynurenine pathway (Trp-KYN) is the major route for tryptophan conversion in the brain and in the periphery. Kynurenines display a wide range of biological actions (which are often contrasting) such as cytotoxic/cytoprotective, oxidant/antioxidant or pro-/anti-inflammatory. The net effect depends on their local concentration, cellular environment, as well as a complex positive and negative feedback loops. The imbalance between beneficial and harmful kynurenines was implicated in the pathogenesis of various neurodegenerative disorders, psychiatric illnesses and metabolic disorders, including diabetes mellitus (DM). Despite available therapies, DM may lead to serious macro- and microvascular complications including cardio- and cerebrovascular disease, peripheral vascular disease, chronic renal disease, diabetic retinopathy, autonomic neuropathy or cognitive impairment. It is well established that low-grade inflammation, which often coincides with DM, can affect the function of KP and, conversely, that kynurenines may modulate the immune response. This review provides a detailed summary of findings concerning the status of the Trp-KYN pathway in DM based on available animal, human and microbiome studies. We highlight the importance of the molecular interplay between the deranged (functionally and qualitatively) conversion of Trp to kynurenines in the development of DM and insulin resistance. The Trp-KYN pathway emerges as a novel target in the search for preventive and therapeutic interventions in DM.
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14
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Maïer B, Tsai AS, Einhaus JF, Desilles JP, Ho-Tin-Noé B, Gory B, Sirota M, Leigh R, Lemmens R, Albers G, Olivot JM, Mazighi M, Gaudillière B. Neuroimaging is the new "spatial omic": multi-omic approaches to neuro-inflammation and immuno-thrombosis in acute ischemic stroke. Semin Immunopathol 2023; 45:125-143. [PMID: 36786929 PMCID: PMC10026385 DOI: 10.1007/s00281-023-00984-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2022] [Accepted: 01/19/2023] [Indexed: 02/15/2023]
Abstract
Ischemic stroke (IS) is the leading cause of acquired disability and the second leading cause of dementia and mortality. Current treatments for IS are primarily focused on revascularization of the occluded artery. However, only 10% of patients are eligible for revascularization and 50% of revascularized patients remain disabled at 3 months. Accumulating evidence highlight the prognostic significance of the neuro- and thrombo-inflammatory response after IS. However, several randomized trials of promising immunosuppressive or immunomodulatory drugs failed to show positive results. Insufficient understanding of inter-patient variability in the cellular, functional, and spatial organization of the inflammatory response to IS likely contributed to the failure to translate preclinical findings into successful clinical trials. The inflammatory response to IS involves complex interactions between neuronal, glial, and immune cell subsets across multiple immunological compartments, including the blood-brain barrier, the meningeal lymphatic vessels, the choroid plexus, and the skull bone marrow. Here, we review the neuro- and thrombo-inflammatory responses to IS. We discuss how clinical imaging and single-cell omic technologies have refined our understanding of the spatial organization of pathobiological processes driving clinical outcomes in patients with an IS. We also introduce recent developments in machine learning statistical methods for the integration of multi-omic data (biological and radiological) to identify patient-specific inflammatory states predictive of IS clinical outcomes.
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Affiliation(s)
- Benjamin Maïer
- Interventional Neuroradiology Department, Hôpital Fondation A. de Rothschild, Paris, France
- Neurology Department, Hôpital Saint-Joseph, Paris, France
- Université Paris-Cité and Université Sorbonne Paris Nord, INSERM, LVTS, F-75018, Paris, France
- FHU NeuroVasc, Paris, France
| | - Amy S Tsai
- Department of Anesthesiology, Perioperative and Pain Medicine, Stanford School of Medicine, 300 Pasteur Drive, Room S238, Stanford, CA, 94305-5117, USA
| | - Jakob F Einhaus
- Department of Anesthesiology, Perioperative and Pain Medicine, Stanford School of Medicine, 300 Pasteur Drive, Room S238, Stanford, CA, 94305-5117, USA
| | - Jean-Philippe Desilles
- Interventional Neuroradiology Department, Hôpital Fondation A. de Rothschild, Paris, France
- Université Paris-Cité and Université Sorbonne Paris Nord, INSERM, LVTS, F-75018, Paris, France
- FHU NeuroVasc, Paris, France
| | - Benoît Ho-Tin-Noé
- Université Paris-Cité and Université Sorbonne Paris Nord, INSERM, LVTS, F-75018, Paris, France
| | - Benjamin Gory
- CHRU-Nancy, Department of Diagnostic and Therapeutic Neuroradiology, Université de Lorraine, F-54000, Nancy, France
| | - Marina Sirota
- Bakar Computational Health Sciences Institute, University of California San Francisco, San Francisco, CA, USA
- Department of Pediatrics, University of California San Francisco, San Francisco, CA, USA
| | - Richard Leigh
- Department of Neurology, Johns Hopkins University, Baltimore, MD, USA
| | - Robin Lemmens
- Department of Neurology, University Hospitals Leuven, Leuven, Belgium
- Department of Neurosciences Division of Experimental Neurology, KU Leuven-University of Leuven, Leuven, Belgium
- VIB, Centre for Brain and Disease Research, Laboratory of Neurobiology, Leuven, Belgium
| | - Gregory Albers
- Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford, CA, USA
| | - Jean-Marc Olivot
- Vascular Neurology Department, University Hospital of Toulouse, Toulouse, France
| | - Mikael Mazighi
- Interventional Neuroradiology Department, Hôpital Fondation A. de Rothschild, Paris, France.
- Université Paris-Cité and Université Sorbonne Paris Nord, INSERM, LVTS, F-75018, Paris, France.
- FHU NeuroVasc, Paris, France.
- Neurology Department, Lariboisière Hospital, Université Paris-Cité, Paris, France.
| | - Brice Gaudillière
- Department of Anesthesiology, Perioperative and Pain Medicine, Stanford School of Medicine, 300 Pasteur Drive, Room S238, Stanford, CA, 94305-5117, USA.
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15
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Ala M, Eftekhar SP. The Footprint of Kynurenine Pathway in Cardiovascular Diseases. Int J Tryptophan Res 2022; 15:11786469221096643. [PMID: 35784899 PMCID: PMC9248048 DOI: 10.1177/11786469221096643] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Accepted: 03/28/2022] [Indexed: 12/30/2022] Open
Abstract
Kynurenine pathway is the main route of tryptophan metabolism and produces several metabolites with various biologic properties. It has been uncovered that several cardiovascular diseases are associated with the overactivation of kynurenine pathway and kynurenine and its metabolites have diagnostic and prognostic value in cardiovascular diseases. Furthermore, it was found that several kynurenine metabolites can differently affect cardiovascular health. For instance, preclinical studies have shown that kynurenine, xanthurenic acid and cis-WOOH decrease blood pressure; kynurenine and 3-hydroxyanthranilic acid prevent atherosclerosis; kynurenic acid supplementation and kynurenine 3-monooxygenase (KMO) inhibition improve the outcome of stroke. Indoleamine 2,3-dioxygenase (IDO) overactivity and increased kynurenine levels improve cardiac and vascular transplantation outcomes, whereas exacerbating the outcome of myocardial ischemia, post-ischemic myocardial remodeling, and abdominal aorta aneurysm. IDO inhibition and KMO inhibition are also protective against viral myocarditis. In addition, dysregulation of kynurenine pathway is observed in several conditions such as senescence, depression, diabetes, chronic kidney disease (CKD), cirrhosis, and cancer closely connected to cardiovascular dysfunction. It is worth defining the exact effect of each metabolite of kynurenine pathway on cardiovascular health. This narrative review is the first review that separately discusses the involvement of kynurenine pathway in different cardiovascular diseases and dissects the underlying molecular mechanisms.
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Affiliation(s)
- Moein Ala
- School of Medicine, Tehran University of Medical Sciences (TUMS), Tehran, Iran
| | - Seyed Parsa Eftekhar
- Student Research Committee, Health Research Center, Babol University of Medical Sciences, Babol, Iran
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16
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Yin Q, Zhang L, Han X, Zhang H, Wang F, Qin X, Zhuang P, Zhang Y. Zi Shen Wan Fang regulates kynurenine metabolism to alleviate diabetes-associated cognitive impairment via activating the skeletal muscle PGC1α-PPARα signaling. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2022; 99:154000. [PMID: 35235888 DOI: 10.1016/j.phymed.2022.154000] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 02/03/2022] [Accepted: 02/15/2022] [Indexed: 06/14/2023]
Abstract
BACKGROUND Cognitive dysfunction is commonly observed in diabetic patients, yet, the underlying mechanisms are obscure and there are no approved drugs. Skeletal muscle is a key pathological organ in diabetes. Evidence is accumulating that skeletal muscle and brain communication are important for cognitive, and kynurenine (KYN) metabolism is one of the mediators. PURPOSE This study aims to elucidate the mechanism of diabetes-induced cognitive impairment (DCI) from the perspective of skeletal muscle and brain communication, and to explore the therapeutic effect of Zi Shen Wan Fang (ZSWF, a optimized prescription consists of Anemarrhenae Rhizoma (Anemarrhena asphodeloides Bge.), Phellodendri Chinensis Cortex (Phellodendron chinense Schneid.) and Cistanches Herba (Cistanche deserticola Y.C.Ma)), in order to provide new strategies for the prevention and treatment of DCI and preliminarily explore valuable drugs. METHODS DCI was induced by intraperitoneal injection of streptozotocin (STZ) combined with a high-fat diet and treated with different dosage ZSWF extract by oral gavage for 8 weeks, once a day. Cognitive and skeletal muscle function was assessed, synaptic plasticity and L-type amino acid transporter (LAT1) was measured. KYN and its metabolites as well as metabolic enzymes in the hippocampus, peripheral blood and skeletal muscle were measured. Peroxisome proliferator-activated receptor-γ co-activator-1α (PGC-1α) and peroxisome proliferator-activated receptor α (PPARα) were measured in skeletal muscle. RESULTS Compared with healthy mice, DCI mice not only showed decreased cognitive function and abnormal skeletal muscle function, but also showed imbalance of KYN metabolism in brain, circulating blood and skeletal muscle. Fortunately, ZSWF administration for 8 weeks notably attenuated the cognitive function, synaptic plasticity and skeletal muscle function in DCI mice. Besides, ZSWF significantly attenuated KYN metabolism in brain, circulation and skeletal muscle of DCI mice. Furthermore, ZSWF activated PGC1α-PPARα in skeletal muscle of DCI mice. CONCLUSIONS These results indicate that abnormal PGC1α-PPARα signaling in skeletal muscle mediating KYN metabolism disorder is one of the pathological mechanisms of DCI, and ZSWF can reverse diabetes-induced cognitive impairment via activating skeletal muscle PGC1α-PPARα signaling to maintain KYN metabolism homeostasis.
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Affiliation(s)
- Qingsheng Yin
- School of Chinese Materia Medica, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
| | - Lin Zhang
- School of Chinese Materia Medica, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
| | - Xu Han
- School of Chinese Materia Medica, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
| | - Hanyu Zhang
- School of Chinese Materia Medica, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
| | - Fang Wang
- School of Chinese Materia Medica, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
| | - Xiuping Qin
- School of Chinese Materia Medica, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
| | - Pengwei Zhuang
- School of Chinese Materia Medica, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China; Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China; Haihe Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China.
| | - Yanjun Zhang
- Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China; Haihe Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China.
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Del'Arco AE, Argolo DS, Guillemin G, Costa MDFD, Costa SL, Pinheiro AM. Neurological Infection, Kynurenine Pathway, and Parasitic Infection by Neospora caninum. Front Immunol 2022; 12:714248. [PMID: 35154065 PMCID: PMC8826404 DOI: 10.3389/fimmu.2021.714248] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Accepted: 12/31/2021] [Indexed: 11/30/2022] Open
Abstract
Neuroinflammation is one of the most frequently studied topics of neurosciences as it is a common feature in almost all neurological disorders. Although the primary function of neuroinflammation is to protect the nervous system from an insult, the complex and sequential response of activated glial cells can lead to neurological damage. Depending on the type of insults and the time post-insult, the inflammatory response can be neuroprotective, neurotoxic, or, depending on the glial cell types, both. There are multiple pathways activated and many bioactive intermediates are released during neuroinflammation. One of the most common one is the kynurenine pathway, catabolizing tryptophan, which is involved in immune regulation, neuroprotection, and neurotoxicity. Different models have been used to study the kynurenine pathway metabolites to understand their involvements in the development and maintenance of the inflammatory processes triggered by infections. Among them, the parasitic infection Neospora caninum could be used as a relevant model to study the role of the kynurenine pathway in the neuroinflammatory response and the subset of cells involved.
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Affiliation(s)
- Ana Elisa Del'Arco
- Laboratory of Biochemistry and Veterinary Immunology, Center of Agrarian, Environmental and Biological Sciences, Federal University of Recôncavo of Bahia (UFRB), Cruz das Almas, Brazil
| | - Deivison Silva Argolo
- Laboratory of Neurochemistry and Cellular Biology, Department of Biochemistry and Biophysics, Institute of Health Sciences, Federal University of Bahia (UFBA), Bahia, Brazil
| | - Gilles Guillemin
- Neuroinflammation Group, Macquarie Medicine School, Macquarie University, Sydney, NSW, Australia
| | - Maria de Fátima Dias Costa
- Laboratory of Neurochemistry and Cellular Biology, Department of Biochemistry and Biophysics, Institute of Health Sciences, Federal University of Bahia (UFBA), Bahia, Brazil
| | - Silvia Lima Costa
- Laboratory of Neurochemistry and Cellular Biology, Department of Biochemistry and Biophysics, Institute of Health Sciences, Federal University of Bahia (UFBA), Bahia, Brazil
| | - Alexandre Moraes Pinheiro
- Laboratory of Biochemistry and Veterinary Immunology, Center of Agrarian, Environmental and Biological Sciences, Federal University of Recôncavo of Bahia (UFRB), Cruz das Almas, Brazil
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Li X, Jia Z, Yan Y. Ticagrelor for prevention of stroke and cognitive impairment in patients with vascular high-risk factors: A meta-analysis of randomized controlled trials. Int J Cardiol 2022; 353:96-102. [PMID: 35114201 DOI: 10.1016/j.ijcard.2022.01.060] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Revised: 01/05/2022] [Accepted: 01/28/2022] [Indexed: 12/15/2022]
Abstract
BACKGROUND In recent randomized controlled studies, the prevention of stroke and cognitive function of ticagrelor has been controversial. We conducted a meta-analysis to compare ticagrelor with other antiplatelet treatment in patients with vascular high-risk factors disease, defined as acute coronary syndrome, stroke or transient ischemic attack, coronary artery disease or peripheral artery disease. METHODS We searched the PubMed, Embase, and Cochrane libraries for published randomized controlled trials and additional available data from ClinicalTrials.gov. The primary outcome was related adverse stroke events and the secondary outcome was cognitive function related adverse events. The outcomes were statistically analyzed using Peto odds ratio. RESULTS 12 RCTs with 105,654 patients were included in meta-analysis. Primary outcomes: all stroke (OR 0.84, 95%CI 0.78-0.90, P < 0.001); Secondary outcomes: ischemic stroke (OR 0.83, 95%CI 0.77-0.90, P < 0.001), transient ischemic attack (OR 0.78, 95%CI 0.62-0.97, P = 0.029), intracranial hemorrhage (OR 1.33, 95%CI 1.09-1.61, P = 0.005), Parkinson's disease (OR 0.30, 95%CI 0.12-0.72, P = 0.007), dementia (OR 0.31, 95%CI 0.13-0.77, P = 0.012), dizziness (OR: 1.39, 95%CI 1.03-1.87, P = 0.032), insomnia (OR 1.45, 95%CI 1.05-2.00, P = 0.026). CONCLUSIONS Ticagrelor may provide more favorable outcomes for all stroke, ischemic stroke, and transient ischemic attack prevention in patients with vascular high-risk factors. However, this benefit may come with the cost of intracranial hemorrhage, dizziness and insomnia. Ticagrelor may reduce the risk of dementia and Parkinson's disease, although available data are limited.
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Affiliation(s)
- Xiaohui Li
- School of Life Science and Enginering, Handan University, People's Republic of China
| | - Zetian Jia
- Department of Neurosurgery, The Second Hospital of Hebei Medical University, Shijiazhuang 050000, People's Republic of China
| | - Yaqi Yan
- Department of Cardiology, The First Hospital of Handan of Hebei Province, Handan 056000, People's Republic of China.
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Fukushima T, Umino M, Sakamoto T, Onozato M. A review of chromatographic methods for bioactive tryptophan metabolites, kynurenine, kynurenic acid, quinolinic acid, and others, in biological fluids. Biomed Chromatogr 2022; 36:e5308. [PMID: 34978092 DOI: 10.1002/bmc.5308] [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: 08/27/2021] [Revised: 12/06/2021] [Accepted: 12/07/2021] [Indexed: 11/06/2022]
Abstract
sKynurenine (KYN) is synthesized from an essential amino acid, tryptophan by tryptophan 2,3-dioxygenase or indoleamine 2,3-dioxygenase via N-formyl- KYN in vivo. Subsequently, KYN acts as a precursor of some neuroactive metabolites such as kynurenic acid, quinolinic acid, and an important enzyme co-factor, nicotine adenine dinucleotide. These metabolites of tryptophan are a part of the "kynurenine pathway." In addition, KYN functions as an endogenous ligand for the aryl hydrocarbon receptor, which acts as a transcription factor. The levels of tryptophan metabolites are important for the assessment of the stage of neurological disorders, and hence, have garnered significant interest for clinical diagnosis. In this review, the detection of kynurenine, kynurenic acid, quinolinic acid, and other tryptophan metabolites performed via chromatographic methods such as HPLC using UV absorbance, fluorescence, and chromatographic-mass spectrometric detection is summarized.
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Affiliation(s)
- Takeshi Fukushima
- Department of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Toho University, Chiba, Japan
| | - Maho Umino
- Department of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Toho University, Chiba, Japan
| | - Tatsuya Sakamoto
- Department of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Toho University, Chiba, Japan
| | - Mayu Onozato
- Department of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Toho University, Chiba, Japan
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Zhen D, Liu J, Zhang XD, Song Z. Kynurenic Acid Acts as a Signaling Molecule Regulating Energy Expenditure and Is Closely Associated With Metabolic Diseases. Front Endocrinol (Lausanne) 2022; 13:847611. [PMID: 35282457 PMCID: PMC8908966 DOI: 10.3389/fendo.2022.847611] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/03/2022] [Accepted: 01/27/2022] [Indexed: 12/14/2022] Open
Abstract
Kynurenic acid (KYNA) is an important bio-active product of tryptophan metabolism. In addition to its well-known neuroprotective effects on mental health disorders, it has been proposed as a bio-marker for such metabolic diseases as atherosclerosis and diabetes. Emerging evidence suggests that KYNA acts as a signaling molecule controlling the networks involved in the balance of energy store and expenditure through GPR35 and AMPK signaling pathway. KYNA plays an important role in the pathogenesis and development of several endocrine and metabolic diseases. Exercise training promotes KYNA production in skeletal muscles and increases thermogenesis in the long term and limits weight gain, insulin resistance and inflammation. Additionally, KYNA is also present in breast milk and may act as an anti-obesity agent in infants. Although we are far from fully understanding the role of KYNA in our body, administration of KYNA, enzyme inhibitors or metabolites may serve as a potential therapeutic strategy for treating metabolic diseases. The present review provides a perspective on the current knowledge regarding the biological effects of KYNA in metabolic diseases and perinatal nutrition.
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Affiliation(s)
- Delong Zhen
- Shandong Institute of Endocrine and Metabolic Diseases, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, China
| | - Junjun Liu
- Shandong Institute of Endocrine and Metabolic Diseases, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, China
| | - Xu Dong Zhang
- Translational Research Institute, Henan Provincial People’s Hospital and People’s Hospital of Zhengzhou University, Academy of Medical Science, Zhengzhou University, Zhengzhou, China
| | - Zehua Song
- Translational Research Institute, Henan Provincial People’s Hospital and People’s Hospital of Zhengzhou University, Academy of Medical Science, Zhengzhou University, Zhengzhou, China
- ENNOVA Institute of Life Science and Technology, ENN Group, Langfang, China
- *Correspondence: Zehua Song,
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Huang Y, Zhao M, Chen X, Zhang R, Le A, Hong M, Zhang Y, Jia L, Zang W, Jiang C, Wang J, Fan X, Wang J. Tryptophan Metabolism in Central Nervous System Diseases: Pathophysiology and Potential Therapeutic Strategies. Aging Dis 2022; 14:858-878. [PMID: 37191427 DOI: 10.14336/ad.2022.0916] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2022] [Accepted: 09/16/2022] [Indexed: 11/19/2022] Open
Abstract
The metabolism of L-tryptophan (TRP) regulates homeostasis, immunity, and neuronal function. Altered TRP metabolism has been implicated in the pathophysiology of various diseases of the central nervous system. TRP is metabolized through two main pathways, the kynurenine pathway and the methoxyindole pathway. First, TRP is metabolized to kynurenine, then kynurenic acid, quinolinic acid, anthranilic acid, 3-hydroxykynurenine, and finally 3-hydroxyanthranilic acid along the kynurenine pathway. Second, TRP is metabolized to serotonin and melatonin along the methoxyindole pathway. In this review, we summarize the biological properties of key metabolites and their pathogenic functions in 12 disorders of the central nervous system: schizophrenia, bipolar disorder, major depressive disorder, spinal cord injury, traumatic brain injury, ischemic stroke, intracerebral hemorrhage, multiple sclerosis, Alzheimer's disease, Parkinson's disease, amyotrophic lateral sclerosis, and Huntington's disease. Furthermore, we summarize preclinical and clinical studies, mainly since 2015, that investigated the metabolic pathway of TRP, focusing on changes in biomarkers of these neurologic disorders, their pathogenic implications, and potential therapeutic strategies targeting this metabolic pathway. This critical, comprehensive, and up-to-date review helps identify promising directions for future preclinical, clinical, and translational research on neuropsychiatric disorders.
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Ephrin-B2 PB-mononuclear cells reduce early post-stroke deficit in diabetic mice but not long-term memory impairment. Exp Neurol 2021; 346:113864. [PMID: 34520725 DOI: 10.1016/j.expneurol.2021.113864] [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: 04/28/2021] [Revised: 09/01/2021] [Accepted: 09/10/2021] [Indexed: 11/23/2022]
Abstract
BACKGROUND AND PURPOSE Post-stroke cognitive impairment (PSCI) has become a major public health issue, as a leading cause of dementia. The inflammation that develops soon after cerebral artery occlusion and may persist for weeks or months after stroke is a key component of PSCI. Our aim was to take advantage of the immunomodulatory properties of peripheral blood mononuclear cells (PB-MNC) stimulated with ephrin-B2/fc (PB-MNC+) for preventing PSCI. METHODS Cortical infarct was induced by thermocoagulation of the middle cerebral artery in male diabetic mice (streptozotocin IP). PB-MNC were isolated from diabetic human donors, washed with recombinant ephrin-B2/Fc and injected into the mice intravenously on the following day. Infarct volume, sensorimotor deficit, cell death and immune cell densities were assessed on day 3. Six weeks later, cognitive assessment was performed using the Barnes maze. RESULTS PB-MNC+ transplanted in post-stroke diabetic mice reduced the neurological deficit, infarct volume and apoptosis at D3, without modification of microglial cells, astrocytes and T-lymphocytes densities in the brain. Barnes maze assessment of memory showed that the learning, retention and reversal phases were not significantly modified by cell therapy. CONCLUSIONS Intravenous PB-MNC+ administration the day after stroke induction in diabetic mice improved sensorimotor deficit and reduced infarct volume at the short term, but was unable to prevent long-term memory loss. To what extent diabetes impacts on cell therapy efficacy will have to be specifically investigated in the future. Including vascular risk factors systematically in preclinical studies of cell therapy will provide a comprehensive understanding of the mechanisms potentially limiting cell efficacy and also to identify good and bad responders, particularly in the long term.
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