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Visser K, Ciubotariu D, de Koning ME, Jacobs B, van Faassen M, van der Ley C, Mayer AR, Meier TB, Bourgonje AR, Kema IP, van Goor H, van der Naalt J, van der Horn HJ. Exploring the kynurenine pathway in mild traumatic brain injury: A longitudinal study. J Neurochem 2024. [PMID: 38770668 DOI: 10.1111/jnc.16137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2024] [Revised: 03/26/2024] [Accepted: 05/08/2024] [Indexed: 05/22/2024]
Abstract
A potential source of novel biomarkers for mTBI is the kynurenine pathway (KP), a metabolic pathway of tryptophan (Trp), that is up-regulated by neuroinflammation and stress. Considering that metabolites of the KP (kynurenines) are implicated in various neuropsychiatric diseases, exploration of this pathway could potentially bridge the gap between physiological and psychological factors in the recovery process after mTBI. This study, therefore, set out to characterize the KP after mTBI and to examine associations with long-term outcome. Patients were prospectively recruited at the emergency department (ED), and blood samples were obtained in the acute phase (<24 h; N = 256) and at 1-month follow-up (N = 146). A comparison group of healthy controls (HC; N = 32) was studied at both timepoints. Trp, kynurenines, and interleukin (IL)-6 and IL-10 were quantified in plasma. Clinical outcome was measured at six months post-injury. Trp, xanthurenic acid (XA), and picolinic acid (PA) were significantly reduced in patients with mTBI relative to HC, corrected for age and sex. For Trp (d = -0.57 vs. d = -0.29) and XA (d = -0.98 vs. d = -0.32), larger effects sizes were observed during the acute phase compared to one-month follow-up, while for PA (d = -0.49 vs. d = -0.52) effect sizes remained consistent. Findings for other kynurenines (e.g., kynurenine, kynurenic acid, and quinolinic acid) were non-significant after correction for multiple testing. Within the mTBI group, lower acute Trp levels were significantly related to incomplete functional recovery and higher depression scores at 6 months post-injury. No significant relationships were found for Trp, XA, and PA with IL-6 or IL-10 concentrations. In conclusion, our findings indicate that perturbations of the plasma KP in the hyperacute phase of mTBI and 1 month later are limited to the precursor Trp, and glutamate system modulating kynurenines XA and PA. Correlations between acute reductions of Trp and unfavorable outcomes may suggest a potential substrate for pharmacological intervention.
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Affiliation(s)
- Koen Visser
- Department of Neurology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Diana Ciubotariu
- Department of Neurology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Myrthe E de Koning
- Department of Neurology, Medical Spectrum Twente, Enschede, The Netherlands
| | - Bram Jacobs
- Department of Neurology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Martijn van Faassen
- Department of Laboratory Medicine, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Claude van der Ley
- Department of Laboratory Medicine, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Andrew R Mayer
- The Mind Research Network and LBERI, Albuquerque, New Mexico, USA
| | - Timothy B Meier
- Department of Neurosurgery, Medical College of Wisconsin, Milwaukee, Wisconsin, USA
- Department of Cell Biology, Neurobiology and Anatomy, Medical College of Wisconsin, Milwaukee, Wisconsin, USA
- Department of Biomedical Engineering, Medical College of Wisconsin, Milwaukee, Wisconsin, USA
| | - Arno R Bourgonje
- The Henry D. Janowitz Division of Gastroenterology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York City, New York, USA
- Department of Gastroenterology and Hepatology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Ido P Kema
- Department of Laboratory Medicine, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Harry van Goor
- Division of Pathology of the Department of Pathology and Medical Biology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Joukje van der Naalt
- Department of Neurology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Harm J van der Horn
- Department of Neurology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
- The Mind Research Network and LBERI, Albuquerque, New Mexico, USA
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Sadek M, Stover KR, Liu X, Reed MA, Weaver DF, Reid AY. IDO-1 inhibition improves outcome after fluid percussion injury in adult male rats. J Neurosci Res 2024; 102:e25338. [PMID: 38706427 DOI: 10.1002/jnr.25338] [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: 09/14/2023] [Revised: 03/15/2024] [Accepted: 04/19/2024] [Indexed: 05/07/2024]
Abstract
The enzyme indoleamine 2,3 dioxygenase 1 (IDO1) catalyzes the rate-limiting step in the kynurenine pathway (KP) which produces both neuroprotective and neurotoxic metabolites. Neuroinflammatory signals produced as a result of pathological conditions can increase production of IDO1 and boost its enzymatic capacity. IDO1 and the KP have been implicated in behavioral recovery after human traumatic brain injury (TBI), but their roles in experimental models of TBI are for the most part unknown. We hypothesized there is an increase in KP activity in the fluid percussion injury (FPI) model of TBI, and that administration of an IDO1 inhibitor will improve neurological recovery. In this study, adult male Sprague Dawley rats were subjected to FPI or sham injury and received twice-daily oral administration of the IDO1 inhibitor PF-06840003 (100 mg/kg) or vehicle control. FPI resulted in a significant increase in KP activity, as demonstrated by an increased ratio of kynurenine: tryptophan, in the perilesional neocortex and ipsilateral hippocampus 3 days postinjury (DPI), which normalized by 7 DPI. The increase in KP activity was prevented by PF-06840003. IDO1 inhibition also improved memory performance as assessed in the Barnes maze and anxiety behaviors as assessed in open field testing in the first 28 DPI. These results suggest increased KP activity after FPI may mediate neurological dysfunction, and IDO1 inhibition should be further investigated as a potential therapeutic target to improve recovery.
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Affiliation(s)
- Marawan Sadek
- Krembil Research Institute, University Health Network, Toronto, Ontario, Canada
- Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada
| | - Kurt R Stover
- Krembil Research Institute, University Health Network, Toronto, Ontario, Canada
| | - Xiaojing Liu
- Krembil Research Institute, University Health Network, Toronto, Ontario, Canada
| | - Mark A Reed
- Krembil Research Institute, University Health Network, Toronto, Ontario, Canada
- Department of Chemistry, University of Toronto, Toronto, Ontario, Canada
- Department of Pharmacology and Toxicology, University of Toronto, Toronto, Ontario, Canada
| | - Donald F Weaver
- Krembil Research Institute, University Health Network, Toronto, Ontario, Canada
- Department of Chemistry, University of Toronto, Toronto, Ontario, Canada
- Division of Neurology, University of Toronto, Toronto, Ontario, Canada
- Department of Pharmaceutical Sciences, University of Toronto, Toronto, Ontario, Canada
| | - Aylin Y Reid
- Krembil Research Institute, University Health Network, Toronto, Ontario, Canada
- Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada
- Division of Neurology, University of Toronto, Toronto, Ontario, Canada
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Fu Y, Jin Z. Effects of Dexmedetomidine on Cognitive Function, Oxidative Stress and Brain Protection in Patients Undergoing Craniocerebral Surgery. ACTAS ESPANOLAS DE PSIQUIATRIA 2024; 52:19-27. [PMID: 38454897 PMCID: PMC10926013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/09/2024]
Abstract
BACKGROUND The protective mechanism of dexmedetomidine on the brains of patients undergoing craniocerebral surgery remains unclear. The aim of this study was to examine the impact of dexmedetomidine on cognitive function, oxidative stress, and brain protection in such patients. METHODS Fifty-four patients who underwent craniocerebral surgery at our hospital from January 2020 to June 2023 were retrospectively selected as study subjects. They were divided into two groups: the control group (n = 27) and the study group (n = 27), based on different auxiliary anesthesia protocols. Patients in the study group received dexmedetomidine before anesthesia induction, using a midline intravenous pump to assist anesthesia, while the control group received an equivalent amount of normal saline. The remaining anesthesia induction and maintenance protocols were consistent for both groups. Cognitive function was assessed using the Mini Mental State Examination (MMSE) before and 1 day after surgery for both groups. Oxidative stress indicators, including malondialdehyde (MDA), glutathione peroxidase (GSH-Px), and superoxide dismutase (SOD) levels in the serum of both groups, were measured using enzyme-linked immunosorbent assay (ELISA). Additionally, changes in postoperative brain injury indicators, namely neuron-specific enolase (NSE) and central nervous system-specific protein (S100β), were detected and compared in the serum of both groups. Concurrently, postoperative adverse reactions were recorded for both groups. RESULTS The MMSE scale scores of both groups of patients 24 hours after surgery were significantly lower than those before surgery. However, the MMSE scale scores of the study group patients were notably higher than those in the control group, with a statistically significant difference (p < 0.05). One hour after surgery, the serum levels of MDA, GSH-Px, and SOD in both groups of patients were significantly elevated compared to pre-surgery levels. Yet, the study group exhibited significantly lower levels of MDA, GSH-Px, and SOD in comparison to the control group, and these differences were statistically significant (p < 0.05). The serum levels of NSE and S100β in both groups were markedly higher than preoperative levels 24 hours after surgery. However, the study group demonstrated significantly lower levels of serum NSE and S100β compared to the control group, with a statistically significant difference (p < 0.05). The incidence of postoperative complications in the study group was 7.41% (2/27), indicating a decreasing trend compared to 18.52% (5/27) in the control group. However, this difference did not reach statistical significance (χ2 = 1.477, p = 0.224). CONCLUSION Dexmedetomidine-assisted anesthesia in craniocerebral surgery can effectively enhance postoperative cognitive function, mitigate oxidative stress, and facilitate overall postoperative recovery for patients. The intervention exhibits a favorable safety profile with no reported serious adverse reactions, establishing it as a relatively safe and reliable approach.
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Affiliation(s)
- Yan Fu
- Department of Anesthesiology, The First People’s Hospital of Daishan, 316200 Zhoushan, Zhejiang, China
| | - Zhu Jin
- Department of Anesthesiology, Sahzu International Medical Center, 311215 Hangzhou, Zhejiang, China
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Zheng X, Wang R, Ma B, Zhang J, Qian X, Fang Q, An J. rTMS reduces spatial learning and memory deficits induced by sleep deprivation possibly via suppressing the expression of kynurenine 3-monooxygenase in rats. Behav Brain Res 2024; 456:114704. [PMID: 37838245 DOI: 10.1016/j.bbr.2023.114704] [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: 06/06/2023] [Revised: 09/25/2023] [Accepted: 10/06/2023] [Indexed: 10/16/2023]
Abstract
INTRODUCTION Impairment of learning and memory caused by sleep deprivation is a common symptom that significantly affects quality of life. Repetitive transcranial magnetic stimulation (rTMS) is a promising approach to exert a positive effect on cognitive impairment. However, there is less known about the mechanism of rTMS for learning and memory induced by chronic REM sleep deprivation (CRSD). This study was to detect the effects of rTMS on spatial learning and memory deficits by CRSD and explore possible mechanism. METHODS Sixty male Sprague-Dawley rats were randomly divided into four groups: wide platform (Control), sleep deprivation (SD), sleep deprivation + rTMS (TMS), and sleep deprivation + sham rTMS (Sham-TMS). Morris water maze (MWM) and open field test (OFT) assessed spatial learning and memory and anxiety of rats with pre/post-intervention. Golgi staining and transmission electron microscope (TEM) were used to observe structural variations of synapses in the hippocampus. The alteration in gene expression of different groups was analyzed by RNA-sequencing (RNA-Seq), and the key gene was screened and identified by quantitative polymerase chain reaction (qPCR) and subsequently verified with western blotting and immunofluorescence. RESULTS The behavioral test showed spatial learning and memory decreased and anxiety increased in the SD group compared to the Control and TMS groups. Moreover, rTMS improved spine density, ultrastructural damage, and quantities of synapses. In accordance with RNA-Seq, 56 differentially expressed genes (DEGs) were identified by comparing alternations in four groups and concentrated on kynurenine 3-monooxygenase (KMO). The expression of KMO increased significantly in rats of the SD group compared to the Control and TMS groups identified by qPCR, western blotting, and immunofluorescence. CONCLUSION 1 Hz rTMS alleviated spatial learning and memory deficits induced by CRSD probably via down-regulating the expression of KMO and improving the structure and quantity of synapses in the hippocampus of rats.
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Affiliation(s)
- Xin Zheng
- Savaid Medical School, University of Chinese Academy of Sciences, Beijing, China; Department of Anesthesiology, Pain & Sleep Medicine, Aviation General Hospital of China Medical University & Beijing Institute of Translational Medicine, Chinese Academy of Sciences, Beijing, China
| | - Ruoguo Wang
- School of Anesthesiology, Weifang Medical University & Department of Anesthesiology, Pain & Sleep Medicine, Affiliated Hospital of Weifang Medical University, Weifang, Shandong, China
| | - Baofeng Ma
- Department of Anesthesiology, Pain & Sleep Medicine, Aviation General Hospital of China Medical University & Beijing Institute of Translational Medicine, Chinese Academy of Sciences, Beijing, China
| | - Jianfeng Zhang
- Savaid Medical School, University of Chinese Academy of Sciences, Beijing, China; School of Anesthesiology, Weifang Medical University & Department of Anesthesiology, Pain & Sleep Medicine, Affiliated Hospital of Weifang Medical University, Weifang, Shandong, China
| | - Xiaoyan Qian
- Department of Anesthesiology, Pain & Sleep Medicine, Aviation General Hospital of China Medical University & Beijing Institute of Translational Medicine, Chinese Academy of Sciences, Beijing, China
| | - Qiwu Fang
- Department of Anesthesiology, Pain & Sleep Medicine, Aviation General Hospital of China Medical University & Beijing Institute of Translational Medicine, Chinese Academy of Sciences, Beijing, China
| | - Jianxiong An
- Savaid Medical School, University of Chinese Academy of Sciences, Beijing, China; School of Anesthesiology, Weifang Medical University & Department of Anesthesiology, Pain & Sleep Medicine, Affiliated Hospital of Weifang Medical University, Weifang, Shandong, China; Department of Anesthesiology, Pain & Sleep Medicine, Aviation General Hospital of China Medical University & Beijing Institute of Translational Medicine, Chinese Academy of Sciences, Beijing, China.
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Tang J, Wu M, Shen J, Jiang L, Chen L, Dang B. Possible role of Sox11 in a rat model of surgical brain injury. IRANIAN JOURNAL OF BASIC MEDICAL SCIENCES 2024; 27:888-894. [PMID: 38800035 PMCID: PMC11127080 DOI: 10.22038/ijbms.2024.71455.15537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Figures] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Accepted: 09/12/2023] [Indexed: 05/29/2024]
Abstract
Objectives Sox11, one of the SoxC family members, is an important transcription factor during neural development and neurogenesis. However, there is no report about its function in neural apoptosis. This research aims to examine the function of Sox11 in surgical brain injury (SBI). Materials and Methods We used 90 Sprague-Dawley rats to develop the SBI models and the siRNA of Sox11 to study the roles of Sox11. Western blot, real-time PCR, immunofluorescence, neuron apoptosis and necrosis, brain edema, and neurological score were determined. Results The gene and protein amount of Sox11, compared with the Sham group, were increased after SBI, which reached a peak at 12 hr. In addition, following the application of siRNAs, the amount of Sox11 protein was significantly less than that in the SBI group. On the other hand, neuronal apoptosis, necrosis, and brain edema were significantly increased, while neurological scores were decreased. Conclusion These findings demonstrate the role of Sox11 following nerve injury induced by SBI. Inhibition of Sox11 with siRNA may lead to neuronal injury and cell death, aggravating secondary brain injury after SBI.
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Affiliation(s)
- Jiafeng Tang
- Department of Rehabilitation, Zhangjiagang TCM Hospital Affiliated to Nanjing University of Chinese Medicine, Zhangjiagang, China
- These authors contributed equally to this work
| | - Muyao Wu
- Department of Rehabilitation, Zhangjiagang TCM Hospital Affiliated to Nanjing University of Chinese Medicine, Zhangjiagang, China
- These authors contributed equally to this work
| | - Jinchao Shen
- Department of Anesthesiology, Zhangjiagang TCM Hospital Affiliated to Nanjing University of Chinese Medicine, Zhangjiagang, China
| | - Lei Jiang
- Department of Rehabilitation, Zhangjiagang TCM Hospital Affiliated to Nanjing University of Chinese Medicine, Zhangjiagang, China
| | - Lifen Chen
- Department of Rehabilitation, Zhangjiagang TCM Hospital Affiliated to Nanjing University of Chinese Medicine, Zhangjiagang, China
| | - Baoqi Dang
- Department of Rehabilitation, Zhangjiagang TCM Hospital Affiliated to Nanjing University of Chinese Medicine, Zhangjiagang, China
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Gervasini G, Verde Z, González LM, Chicharro C, González-Rodríguez L, Fernández-Araque A, Mota-Zamorano S, Cancho B, Pérez-Hernández A, García-López V, Bandrés F, Robles NR. Prognostic Significance of Amino Acid and Biogenic Amines Profiling in Chronic Kidney Disease. Biomedicines 2023; 11:2775. [PMID: 37893147 PMCID: PMC10604890 DOI: 10.3390/biomedicines11102775] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Revised: 09/23/2023] [Accepted: 10/11/2023] [Indexed: 10/29/2023] Open
Abstract
There is a pressing need for more precise biomarkers of chronic kidney disease (CKD). Plasma samples from 820 subjects [231 with CKD, 325 with end-stage kidney disease (ESKD) and 264 controls] were analyzed by liquid chromatography with tandem mass spectrometry (LC-MS/MS) to determine a metabolic profile of 28 amino acids (AAs) and biogenic amines to test their value as markers of CKD risk and progression. The kynurenine/tryptophan ratio showed the strongest correlation with estimated glomerular filtration rate values (coefficient = -0.731, p < 0.0001). Models created with orthogonal partial least squares-discriminant analysis (OPLS-DA) containing the metabolic signature showed a high goodness of fit and predictability for controls/CKD (R2X:0.73:R2Y:0.92:Q2:0.92, p < 0.0001) and lower values for CKD/ESKD (R2X:0.56:R2Y:0.59:Q2:0.55, p < 0.0001). Based on generated VIP scores, the most relevant markers for segregating samples into control/CKD and CKD/ESKD groups were citrulline (1.63) and tryptophan (1.47), respectively. ROC analysis showed that the addition of the metabolic profile to a model including CKD classic risk factors improved the AUC from 86.7% (83.6-89.9) to 100% (100-100) for CKD risk (p < 0.0001) and from 63.0% (58.2-67.8) to 96.5% (95.3-97.8) for the risk of progression from CKD to ESKD (p < 0.0001). Plasma concentrations of AAs and related amines may be useful as diagnostic biomarkers of kidney disease, both for CKD risk and for progression of CKD patients to ESKD.
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Affiliation(s)
- Guillermo Gervasini
- Department of Medical and Surgical Therapeutics, Medical School, University of Extremadura, 06006 Badajoz, Spain; (L.M.G.); (L.G.-R.); (S.M.-Z.); (V.G.-L.)
- Institute of Molecular Pathology Biomarkers, University of Extremadura, 06006 Badajoz, Spain
- RICORS2040 Renal Research Network, 28029 Madrid, Spain;
| | - Zoraida Verde
- Department of Biochemistry, Molecular Biology and Physiology, Universidad de Valladolid, 42005 Soria, Spain;
- GIR—Pharmacogenetics, Cancer Genetics, Genetic Polymorphisms and Pharmacoepidemiology, University of Valladolid, 47005 Valladolid, Spain;
- Research Group Centro de Estudios Gregorio Marañón, Fundación Ortega-Marañón, 28010 Madrid, Spain; (C.C.); (F.B.)
| | - Luz M. González
- Department of Medical and Surgical Therapeutics, Medical School, University of Extremadura, 06006 Badajoz, Spain; (L.M.G.); (L.G.-R.); (S.M.-Z.); (V.G.-L.)
| | - Celia Chicharro
- Research Group Centro de Estudios Gregorio Marañón, Fundación Ortega-Marañón, 28010 Madrid, Spain; (C.C.); (F.B.)
- Biopathology-Toxicology Laboratory, Department of Legal Medicine, Psychiatry and Pathology, Faculty of Medicine, University Complutense of Madrid, 28040 Madrid, Spain
| | - Laura González-Rodríguez
- Department of Medical and Surgical Therapeutics, Medical School, University of Extremadura, 06006 Badajoz, Spain; (L.M.G.); (L.G.-R.); (S.M.-Z.); (V.G.-L.)
- RICORS2040 Renal Research Network, 28029 Madrid, Spain;
| | - Ana Fernández-Araque
- GIR—Pharmacogenetics, Cancer Genetics, Genetic Polymorphisms and Pharmacoepidemiology, University of Valladolid, 47005 Valladolid, Spain;
- Department of Nursery, University of Valladolid, 42005 Soria, Spain
| | - Sonia Mota-Zamorano
- Department of Medical and Surgical Therapeutics, Medical School, University of Extremadura, 06006 Badajoz, Spain; (L.M.G.); (L.G.-R.); (S.M.-Z.); (V.G.-L.)
| | - Bárbara Cancho
- Service of Nephrology, Badajoz University Hospital, 06006 Badajoz, Spain;
| | | | - Virginio García-López
- Department of Medical and Surgical Therapeutics, Medical School, University of Extremadura, 06006 Badajoz, Spain; (L.M.G.); (L.G.-R.); (S.M.-Z.); (V.G.-L.)
| | - Fernando Bandrés
- Research Group Centro de Estudios Gregorio Marañón, Fundación Ortega-Marañón, 28010 Madrid, Spain; (C.C.); (F.B.)
- Biopathology-Toxicology Laboratory, Department of Legal Medicine, Psychiatry and Pathology, Faculty of Medicine, University Complutense of Madrid, 28040 Madrid, Spain
| | - Nicolás R. Robles
- RICORS2040 Renal Research Network, 28029 Madrid, Spain;
- Service of Nephrology, Badajoz University Hospital, 06006 Badajoz, Spain;
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Kynurenine Pathway Metabolites as Biomarkers in Alzheimer’s Disease. DISEASE MARKERS 2022; 2022:9484217. [PMID: 35096208 PMCID: PMC8791723 DOI: 10.1155/2022/9484217] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/10/2021] [Revised: 12/21/2021] [Accepted: 12/31/2021] [Indexed: 12/11/2022]
Abstract
Alzheimer's disease (AD) is a progressive neurodegenerative disorder that deteriorates cognitive function. Patients with AD generally exhibit neuroinflammation, elevated beta-amyloid (Aβ), tau phosphorylation (p-tau), and other pathological changes in the brain. The kynurenine pathway (KP) and several of its metabolites, especially quinolinic acid (QA), are considered to be involved in the neuropathogenesis of AD. The important metabolites and key enzymes show significant importance in neuroinflammation and AD. Meanwhile, the discovery of changed levels of KP metabolites in patients with AD suggests that KP metabolites may have a prominent role in the pathogenesis of AD. Further, some KP metabolites exhibit other effects on the brain, such as oxidative stress regulation and neurotoxicity. Both analogs of the neuroprotective and antineuroinflammation metabolites and small molecule enzyme inhibitors preventing the formation of neurotoxic and neuroinflammation compounds may have potential therapeutic significance. This review focused on the KP metabolites through the relationship of neuroinflammation in AD, significant KP metabolites, and associated molecular mechanisms as well as the utility of these metabolites as biomarkers and therapeutic targets for AD. The objective is to provide references to find biomarkers and therapeutic targets for patients with AD.
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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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Maryška M, Svobodová L, Dehaen W, Hrabinová M, Rumlová M, Soukup O, Kuchař M. Heterocyclic Cathinones as Inhibitors of Kynurenine Aminotransferase II-Design, Synthesis, and Evaluation. Pharmaceuticals (Basel) 2021; 14:ph14121291. [PMID: 34959692 PMCID: PMC8708382 DOI: 10.3390/ph14121291] [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: 10/18/2021] [Revised: 11/24/2021] [Accepted: 12/08/2021] [Indexed: 11/16/2022] Open
Abstract
Kynurenic acid is a neuroprotective metabolite of tryptophan formed by kynurenine aminotransferase (KAT) catalyzed transformation of kynurenine. However, its high brain levels are associated with cognitive deficit and with the pathophysiology of schizophrenia. Although several classes of KAT inhibitors have been published, the search for new inhibitor chemotypes is crucial for the process of finding suitable clinical candidates. Therefore, we used pharmacophore modeling and molecular docking, which predicted derivatives of heterocyclic amino ketones as new potential irreversible inhibitors of kynurenine aminotransferase II. Thiazole and triazole-based amino ketones were synthesized within a SAR study and their inhibitory activities were evaluated in vitro. The observed activities confirmed our computational model and, moreover, the best compounds showed sub-micromolar inhibitory activity with 2-alaninoyl-5-(4-fluorophenyl)thiazole having IC50 = 0.097 µM.
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Affiliation(s)
- Michal Maryška
- Forensic Laboratory of Biologically Active Substances, Department of Chemistry of Natural Compounds, Faculty of Food and Biochemical Technology, University of Chemistry and Technology Prague, Technická 5, 16628 Prague, Czech Republic; (M.M.); (L.S.)
- National Institute of Mental Health, Topolová 748, 250 67 Klecany, Czech Republic
| | - Lucie Svobodová
- Forensic Laboratory of Biologically Active Substances, Department of Chemistry of Natural Compounds, Faculty of Food and Biochemical Technology, University of Chemistry and Technology Prague, Technická 5, 16628 Prague, Czech Republic; (M.M.); (L.S.)
| | - Wim Dehaen
- CZ-OPENSCREEN: National Infrastructure for Chemical Biology, Department of Informatics and Chemistry, Faculty of Chemical Technology, University of Chemistry and Technology Prague, Technická 5, 16628 Prague, Czech Republic;
| | - Martina Hrabinová
- Biomedical Research Center, University Hospital Hradec Králové, Sokolská 581, 50005 Hradec Kralové, Czech Republic; (M.H.); (O.S.)
- Department of Toxicology and Military Pharmacy, University of Defense, Třebešská 1575, 50005 Hradec Králové, Czech Republic
| | - Michaela Rumlová
- Department of Biotechnology, Faculty of Food and Biochemical Technology, University of Chemistry and Technology Prague, Technická 5, 16628 Prague, Czech Republic;
| | - Ondřej Soukup
- Biomedical Research Center, University Hospital Hradec Králové, Sokolská 581, 50005 Hradec Kralové, Czech Republic; (M.H.); (O.S.)
- Department of Toxicology and Military Pharmacy, University of Defense, Třebešská 1575, 50005 Hradec Králové, Czech Republic
| | - Martin Kuchař
- Forensic Laboratory of Biologically Active Substances, Department of Chemistry of Natural Compounds, Faculty of Food and Biochemical Technology, University of Chemistry and Technology Prague, Technická 5, 16628 Prague, Czech Republic; (M.M.); (L.S.)
- National Institute of Mental Health, Topolová 748, 250 67 Klecany, Czech Republic
- Correspondence: ; Tel.: +420-220-444-431
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10
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Mithaiwala MN, Santana-Coelho D, Porter GA, O’Connor JC. Neuroinflammation and the Kynurenine Pathway in CNS Disease: Molecular Mechanisms and Therapeutic Implications. Cells 2021; 10:1548. [PMID: 34205235 PMCID: PMC8235708 DOI: 10.3390/cells10061548] [Citation(s) in RCA: 54] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2021] [Revised: 06/13/2021] [Accepted: 06/15/2021] [Indexed: 12/16/2022] Open
Abstract
Diseases of the central nervous system (CNS) remain a significant health, social and economic problem around the globe. The development of therapeutic strategies for CNS conditions has suffered due to a poor understanding of the underlying pathologies that manifest them. Understanding common etiological origins at the cellular and molecular level is essential to enhance the development of efficacious and targeted treatment options. Over the years, neuroinflammation has been posited as a common link between multiple neurological, neurodegenerative and neuropsychiatric disorders. Processes that precipitate neuroinflammatory conditions including genetics, infections, physical injury and psychosocial factors, like stress and trauma, closely link dysregulation in kynurenine pathway (KP) of tryptophan metabolism as a possible pathophysiological factor that 'fuel the fire' in CNS diseases. In this study, we aim to review emerging evidence that provide mechanistic insights between different CNS disorders, neuroinflammation and the KP. We provide a thorough overview of the different branches of the KP pertinent to CNS disease pathology that have therapeutic implications for the development of selected and efficacious treatment strategies.
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Affiliation(s)
- Mustafa N. Mithaiwala
- Integrated Biomedical Sciences Program, Graduate School of Biomedical Sciences, UT Health San Antonio, San Antonio, TX 78229, USA; (M.N.M.); (D.S.-C.); (G.A.P.)
- Department of Pharmacology, Long School of Medicine, UT Health San Antonio, Mail Code 8864, San Antonio, TX 78229, USA
| | - Danielle Santana-Coelho
- Integrated Biomedical Sciences Program, Graduate School of Biomedical Sciences, UT Health San Antonio, San Antonio, TX 78229, USA; (M.N.M.); (D.S.-C.); (G.A.P.)
- Department of Pharmacology, Long School of Medicine, UT Health San Antonio, Mail Code 8864, San Antonio, TX 78229, USA
| | - Grace A. Porter
- Integrated Biomedical Sciences Program, Graduate School of Biomedical Sciences, UT Health San Antonio, San Antonio, TX 78229, USA; (M.N.M.); (D.S.-C.); (G.A.P.)
- Department of Pharmacology, Long School of Medicine, UT Health San Antonio, Mail Code 8864, San Antonio, TX 78229, USA
| | - Jason C. O’Connor
- Integrated Biomedical Sciences Program, Graduate School of Biomedical Sciences, UT Health San Antonio, San Antonio, TX 78229, USA; (M.N.M.); (D.S.-C.); (G.A.P.)
- Department of Pharmacology, Long School of Medicine, UT Health San Antonio, Mail Code 8864, San Antonio, TX 78229, USA
- Department of Research, Audie L. Murphy VA Hospital, South Texas Veterans Heath System, San Antonio, TX 78229, USA
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11
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Danehower S. Targeting gut dysbiosis as a means to enhance recovery from surgical brain injury. Surg Neurol Int 2021; 12:210. [PMID: 34084637 PMCID: PMC8168676 DOI: 10.25259/sni_72_2021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Accepted: 04/11/2021] [Indexed: 11/04/2022] Open
Abstract
Background Surgical brain injury (SBI) impacts roughly 800,000 people who undergo neurosurgical procedures each year. SBI is the result of unavoidable parenchymal damage, vessel disruption, and thermal injury that is an inherent part of all neurosurgical procedures. Clinically, SBI has been associated with postoperative seizures and long-term neurobehavioral deficits. Current therapies are aimed at providing symptom relief by reducing swelling and preventing seizures. However, there are no therapies aimed at reducing the extent of SBI preoperatively. The microbiome-gut-brain axis may serve as a potential target for the development of new preventative therapies due to its extensive involvement in central nervous system function. Methods An extensive literature review was conducted to determine whether there is a potential role for dysbiosis treatment in reducing the extent of SBI. Results Treatment of gut dysbiosis deserves further exploration as a potential means of reducing the extent of unavoidable SBI. Dysbiosis has been correlated with increased neuroinflammation through impaired immune regulation, increased blood-brain barrier permeability, and increased production of reactive metabolites. Recently, dysbiosis has also been linked to acute neurological dysfunction in the postoperative state. Importantly, treatment of dysbiosis has been correlated with better patient outcomes and decreased length of stay in surgical patients. Conclusion Current literature supports the role of dysbiosis treatment in the preoperative setting as a means of optimizing neurological recovery following unavoidable SBI that results from all neurosurgical procedures.
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Affiliation(s)
- Sarah Danehower
- Drexel University College of Medicine, Philadelphia, Pennsylvania, United States
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12
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Zhang S, Collier MEW, Heyes DJ, Giorgini F, Scrutton NS. Advantages of brain penetrating inhibitors of kynurenine-3-monooxygenase for treatment of neurodegenerative diseases. Arch Biochem Biophys 2020; 697:108702. [PMID: 33275878 DOI: 10.1016/j.abb.2020.108702] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Revised: 11/18/2020] [Accepted: 11/24/2020] [Indexed: 01/16/2023]
Abstract
Kynurenine-3-monooxygenase (KMO) is an important therapeutic target for several brain disorders that has been extensively studied in recent years. Potent inhibitors towards KMO have been developed and tested within different disease models, showing great therapeutic potential, especially in models of neurodegenerative disease. The inhibition of KMO reduces the production of downstream toxic kynurenine pathway metabolites and shifts the flux to the formation of the neuroprotectant kynurenic acid. However, the efficacy of KMO inhibitors in neurodegenerative disease has been limited by their poor brain permeability. Combined with virtual screening and prodrug strategies, a novel brain penetrating KMO inhibitor has been developed which dramatically decreases neurotoxic metabolites. This review highlights the importance of KMO as a drug target in neurological disease and the benefits of brain permeable inhibitors in modulating kynurenine pathway metabolites in the central nervous system.
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Affiliation(s)
- Shaowei Zhang
- Manchester Institute of Biotechnology, Department of Chemistry, School of Natural Sciences, The University of Manchester, 131 Princess Street, Manchester, M1 7DN, UK
| | - Mary E W Collier
- Department of Genetics and Genome Biology, University of Leicester, Leicester, LE1 7RH, UK
| | - Derren J Heyes
- Manchester Institute of Biotechnology, Department of Chemistry, School of Natural Sciences, The University of Manchester, 131 Princess Street, Manchester, M1 7DN, UK
| | - Flaviano Giorgini
- Department of Genetics and Genome Biology, University of Leicester, Leicester, LE1 7RH, UK
| | - Nigel S Scrutton
- Manchester Institute of Biotechnology, Department of Chemistry, School of Natural Sciences, The University of Manchester, 131 Princess Street, Manchester, M1 7DN, UK.
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13
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The effectiveness of hyperbaric oxygen modalities against vascular component of traumatic brain injury. BRAIN HEMORRHAGES 2020. [DOI: 10.1016/j.hest.2020.04.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
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Eser Ocak P, Ocak U, Sherchan P, Gamdzyk M, Tang J, Zhang JH. Overexpression of Mfsd2a attenuates blood brain barrier dysfunction via Cav-1/Keap-1/Nrf-2/HO-1 pathway in a rat model of surgical brain injury. Exp Neurol 2020; 326:113203. [PMID: 31954682 PMCID: PMC7038791 DOI: 10.1016/j.expneurol.2020.113203] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Revised: 01/13/2020] [Accepted: 01/14/2020] [Indexed: 01/01/2023]
Abstract
INTRODUCTION Disruption of the blood brain barrier (BBB) and subsequent cerebral edema formation is one of the major adverse effects of brain surgery, leading to postoperative neurological dysfunction. Recently, Mfsd2a has been shown to have a crucial role for the maintenance of BBB functions. In this study, we aimed to evaluate the role of Mfsd2a on BBB disruption following surgical brain injury (SBI) in rats. MATERIALS AND METHODS Rats were subjected to SBI by partial resection of the right frontal lobe. To evaluate the effect of Mfsd2a on BBB permeability and neurobehavior outcome following SBI, Mfsd2a was either overexpressed or downregulated in the brain by administering Mfsd2a CRISPR activation or knockout plasmids, respectively. The potential mechanism of Mfsd2a-mediated BBB protection through the cav-1/Nrf-2/HO-1 signaling pathway was evaluated. RESULTS Mfsd2a levels were significantly decreased while cav-1, Nrf-2 and HO-1 levels were increased in the right frontal perisurgical area following SBI. When overexpressed, Mfsd2a attenuated brain edema and abolished neurologic impairment caused by SBI while downregulation of Mfsd2a expression further deteriorated BBB functions and worsened neurologic performance following SBI. The beneficial effect of Mfsd2a overexpression on BBB functions was associated with diminished expression of cav-1, increased Keap-1/Nrf-2 dissociation and further augmented levels of Nrf-2 and HO-1 in the right frontal perisurgical area, leading to enhanced levels of tight junction proteins following SBI. The BBB protective effect of Mfsd2a was blocked by selective inhibitors of Nrf-2 and HO-1. CONCLUSIONS Mfsd2a attenuates BBB disruption through cav-1/Nrf-2/HO-1 signaling pathway in rats subjected to experimental SBI.
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Affiliation(s)
- Pinar Eser Ocak
- Department of Physiology and Pharmacology, Loma Linda University School of Medicine, Loma Linda, CA 92354, USA; Department of Neurosurgery, Uludag University School of Medicine, Bursa 16120, Turkey
| | - Umut Ocak
- Department of Physiology and Pharmacology, Loma Linda University School of Medicine, Loma Linda, CA 92354, USA; Department of Emergency Medicine, Bursa Yuksek Ihtisas Training and Research Hospital, University of Health Sciences, Bursa 16310, Turkey; Department of Emergency Medicine, Bursa City Hospital, Bursa 16110, Turkey
| | - Prativa Sherchan
- Department of Physiology and Pharmacology, Loma Linda University School of Medicine, Loma Linda, CA 92354, USA
| | - Marcin Gamdzyk
- Department of Physiology and Pharmacology, Loma Linda University School of Medicine, Loma Linda, CA 92354, USA
| | - Jiping Tang
- Department of Physiology and Pharmacology, Loma Linda University School of Medicine, Loma Linda, CA 92354, USA
| | - John H Zhang
- Department of Physiology and Pharmacology, Loma Linda University School of Medicine, Loma Linda, CA 92354, USA; Department of Anesthesiology, Loma Linda University School of Medicine, Loma Linda, CA 92354, USA; Department of Neurology, Loma Linda University School of Medicine, Loma Linda, CA 92354, USA; Department of Neurosurgery, Loma Linda University School of Medicine, Loma Linda, CA 92354, USA.
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Travis ZD, Sherchan P, Hayes WK, Zhang JH. Surgically-induced brain injury: where are we now? Chin Neurosurg J 2019; 5:29. [PMID: 32922928 PMCID: PMC7398187 DOI: 10.1186/s41016-019-0181-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Accepted: 11/14/2019] [Indexed: 12/18/2022] Open
Abstract
Neurosurgical procedures cause inevitable brain damage from the multitude of surgical manipulations utilized. Incisions, retraction, thermal damage from electrocautery, and intraoperative hemorrhage cause immediate and long-term brain injuries that are directly linked to neurosurgical operations, and these types of injuries, collectively, have been termed surgical brain injury (SBI). For the past decade, a model developed to study the underlying brain pathologies resulting from SBI has provided insight on cellular mechanisms and potential therapeutic targets. This model, as seen in a rat, mouse, and rabbit, mimics a neurosurgical operation and causes commonly encountered post-operative complications such as brain edema, neuroinflammation, and hemorrhage. In this review, we elaborate on SBI and its clinical impact, the SBI animal models and their clinical relevance, the importance of applying therapeutics before neurosurgical procedures (i.e., preconditioning), and the new direction of applying venom-derived proteins to attenuate SBI.
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Affiliation(s)
- Zachary D Travis
- Department of Earth and Biological Sciences, School of Medicine, Loma Linda University, Loma Linda, CA 92354 USA
| | - Prativa Sherchan
- Department of Physiology and Pharmacology, School of Medicine, Loma Linda University, Loma Linda, CA 92354 USA
| | - William K Hayes
- Department of Earth and Biological Sciences, School of Medicine, Loma Linda University, Loma Linda, CA 92354 USA
| | - John H Zhang
- Department of Physiology and Pharmacology, School of Medicine, Loma Linda University, Loma Linda, CA 92354 USA.,Department of Anesthesiology, School of Medicine, Loma Linda University, Loma Linda, CA 92354 USA
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