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Sakai R, Matsumura K, Uchimasu H, Miyako K, Taniguchi T, Kovvuri VRR, Acharige AD, Hull KG, Romo D, Thaveepornkul L, Chimnaronk S, Miyamoto H, Takada A, Watari H, Fujita MJ, Sakaue J. Dopamine-Derived Guanidine Alkaloids from a Didemnidae Tunicate: Isolation, Synthesis, and Biological Activities. J Org Chem 2024; 89:5977-5987. [PMID: 38557022 DOI: 10.1021/acs.joc.3c02765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
Mellpaladines A-C (1-3) and dopargimine (4) are dopamine-derived guanidine alkaloids isolated from a specimen of Palauan Didemnidae tunicate as possible modulators of neuronal receptors. In this study, we isolated the dopargimine derivative 1-carboxydopargimine (5), three additional mellpaladines D-F (6-8), and serotodopalgimine (9), along with a dimer of serotonin, 5,5'-dihydroxy-4,4'-bistryptamine (10). The structures of these compounds were determined based on spectrometric and spectroscopic analyses. Compound 4 and its congeners dopargine (11), nordopargimine (15), and 2-(6,7-dimethoxy-3,4-dihydroisoquinolin-1-yl)ethan-1-amine (16) were synthetically prepared for biological evaluations. The biological activities of all isolated compounds were evaluated in comparison with those of 1-4 using a mouse behavioral assay upon intracerebroventricular injection, revealing key functional groups in the dopargimines and mellpaladines for in vivo behavioral toxicity. Interestingly, these alkaloids also emerged during a screen of our marine natural product library aimed at identifying antiviral activities against dengue virus, SARS-CoV-2, and vesicular stomatitis Indiana virus (VSV) pseudotyped with Ebola virus glycoprotein (VSV-ZGP).
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Affiliation(s)
- Ryuichi Sakai
- Faculty and Graduate School of Fisheries Sciences, Hokkaido University, 3-1-1 Minato-Cho, Hakodate, Hokkaido 041-8611, Japan
| | - Ken Matsumura
- Graduate School of Fisheries Sciences, Hokkaido University, 3-1-1 Minato-Cho, Hakodate, Hokkaido 041-8611, Japan
| | - Hajime Uchimasu
- Graduate School of Fisheries Sciences, Hokkaido University, 3-1-1 Minato-Cho, Hakodate, Hokkaido 041-8611, Japan
| | - Kei Miyako
- Graduate School of Fisheries Sciences, Hokkaido University, 3-1-1 Minato-Cho, Hakodate, Hokkaido 041-8611, Japan
| | - Tohru Taniguchi
- Frontier Research Center for Advanced Material and Life Science, Faculty of Advanced Life Science, Hokkaido University, Kita 21 Nishi 11, Sapporo 001-0021, Japan
| | - V Raghavendra Rao Kovvuri
- Department of Chemistry and Biochemistry & The Baylor Synthesis and Drug Lead Discovery Laboratory, Baylor University, 101 Bagby Avenue, Waco, Texas 76798-7348, United States
| | - Anjana Delpe Acharige
- Department of Chemistry and Biochemistry & The Baylor Synthesis and Drug Lead Discovery Laboratory, Baylor University, 101 Bagby Avenue, Waco, Texas 76798-7348, United States
| | - Kenneth G Hull
- Department of Chemistry and Biochemistry & The Baylor Synthesis and Drug Lead Discovery Laboratory, Baylor University, 101 Bagby Avenue, Waco, Texas 76798-7348, United States
| | - Daniel Romo
- Department of Chemistry and Biochemistry & The Baylor Synthesis and Drug Lead Discovery Laboratory, Baylor University, 101 Bagby Avenue, Waco, Texas 76798-7348, United States
| | - Lakkana Thaveepornkul
- Institute of Molecular Biosciences, Mahidol University, 25/25 Phutthamonthon 4 Road, Salaya, Nakhon Pathom 73170, Thailand
| | - Sarin Chimnaronk
- Institute of Molecular Biosciences, Mahidol University, 25/25 Phutthamonthon 4 Road, Salaya, Nakhon Pathom 73170, Thailand
| | - Hiroko Miyamoto
- Division of Global Epidemiology, International Institute for Zoonosis Control, Hokkaido University, Kita 20 Nishi 10, Sapporo 001-0020, Japan
| | - Ayato Takada
- Division of Global Epidemiology, International Institute for Zoonosis Control, Hokkaido University, Kita 20 Nishi 10, Sapporo 001-0020, Japan
- International Collaboration Unit, International Institute for Zoonosis Control, Hokkaido University, Kita 20 Nishi 10, Sapporo 001-0020, Japan
- One Health Research Center, Hokkaido University, Kita 20 Nishi 10, Sapporo 001-0020, Japan
| | - Hiromi Watari
- Faculty and Graduate School of Fisheries Sciences, Hokkaido University, 3-1-1 Minato-Cho, Hakodate, Hokkaido 041-8611, Japan
| | - Masaki J Fujita
- Faculty and Graduate School of Fisheries Sciences, Hokkaido University, 3-1-1 Minato-Cho, Hakodate, Hokkaido 041-8611, Japan
| | - Jiro Sakaue
- Southern Marine Laboratory, P.O. Box 6096, Koror 96940, Palau
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Prajapati KP, Mittal S, Ansari M, Mahato OP, Bharati S, Singh AP, Ahlawat S, Tiku AB, Anand BG, Kar K. Pleiotropic Nanostructures Built from l-Histidine Show Biologically Relevant Multicatalytic Activities. ACS APPLIED MATERIALS & INTERFACES 2024; 16:18268-18284. [PMID: 38564419 DOI: 10.1021/acsami.3c14606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
The essential amino acid histidine plays a central role in the manifestation of several metabolic processes, including protein synthesis, enzyme-catalysis, and key biomolecular interactions. However, excess accumulation of histidine causes histidinemia, which shows brain-related medical complications, and the molecular mechanism of such histidine-linked complications is largely unknown. Here, we show that histidine undergoes a self-assembly process, leading to the formation of amyloid-like cytotoxic and catalytically active nanofibers. The kinetics of histidine self-assembly was favored in the presence of Mg(II) and Co(II) ions. Molecular dynamics data showed that preferential noncovalent interactions dominated by H-bonds between histidine molecules facilitate the formation of histidine nanofibers. The histidine nanofibers induced amyloid cross-seeding reactions in several proteins and peptides including pathogenic Aβ1-42 and brain extract components. Further, the histidine nanofibers exhibited oxidase activity and enhanced the oxidation of neurotransmitters. Cell-based studies confirmed the cellular internalization of histidine nanofibers in SH-SY5Y cells and subsequent cytotoxic effects through necrosis and apoptosis-mediated cell death. Since several complications including behavioral abnormality, developmental delay, and neurological disabilities are directly linked to abnormal accumulation of histidine, our findings provide a foundational understanding of the mechanism of histidine-related complications. Further, the ability of histidine nanofibers to catalyze amyloid seeding and oxidation reactions is equally important for both biological and materials science research.
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Affiliation(s)
- Kailash Prasad Prajapati
- Biophysical and Biomaterials Research Laboratory, School of Life Sciences, Jawaharlal Nehru University, New Delhi 110067, India
| | - Shikha Mittal
- Biophysical and Biomaterials Research Laboratory, School of Life Sciences, Jawaharlal Nehru University, New Delhi 110067, India
| | - Masihuzzaman Ansari
- Biophysical and Biomaterials Research Laboratory, School of Life Sciences, Jawaharlal Nehru University, New Delhi 110067, India
| | - Om Prakash Mahato
- Biophysical and Biomaterials Research Laboratory, School of Life Sciences, Jawaharlal Nehru University, New Delhi 110067, India
| | - Shikha Bharati
- Biophysical and Biomaterials Research Laboratory, School of Life Sciences, Jawaharlal Nehru University, New Delhi 110067, India
| | - Akhilesh Pratap Singh
- Biophysical and Biomaterials Research Laboratory, School of Life Sciences, Jawaharlal Nehru University, New Delhi 110067, India
| | - Shobha Ahlawat
- Biophysical and Biomaterials Research Laboratory, School of Life Sciences, Jawaharlal Nehru University, New Delhi 110067, India
| | - Ashu Bhan Tiku
- Biophysical and Biomaterials Research Laboratory, School of Life Sciences, Jawaharlal Nehru University, New Delhi 110067, India
| | - Bibin Gnanadhason Anand
- Biomolecular Self-Assembly Lab, Department of Biotechnology, School of Bioengineering, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu 603203, India
| | - Karunakar Kar
- Biophysical and Biomaterials Research Laboratory, School of Life Sciences, Jawaharlal Nehru University, New Delhi 110067, India
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Han J. Copper trafficking systems in cells: insights into coordination chemistry and toxicity. Dalton Trans 2023; 52:15277-15296. [PMID: 37702384 DOI: 10.1039/d3dt02166a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/14/2023]
Abstract
Transition metal ions, such as copper, are indispensable components in the biological system. Copper ions which primarily exist in two major oxidation states Cu(I) and Cu(II) play crucial roles in various cellular processes including antioxidant defense, biosynthesis of neurotransmitters, and energy metabolism, owing to their inherent redox activity. The disturbance in copper homeostasis can contribute to the development of copper metabolism disorders, cancer, and neurodegenerative diseases, highlighting the significance of understanding the copper trafficking system in cellular environments. This review aims to offer a comprehensive overview of copper homeostatic machinery, with an emphasis on the coordination chemistry of copper transporters and trafficking proteins. While copper chaperones and the corresponding metalloenzymes are thoroughly discussed, we also explore the potential existence of low-molecular-mass metal complexes within cellular systems. Furthermore, we summarize the toxicity mechanisms originating from copper deficiency or accumulation, which include the dysregulation of oxidative stress, signaling pathways, signal transduction, and amyloidosis. This perspective review delves into the current knowledge regarding the intricate aspects of the copper trafficking system, providing valuable insights into potential treatment strategies from the standpoint of bioinorganic chemistry.
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Affiliation(s)
- Jiyeon Han
- Department of Applied Chemistry, University of Seoul, Seoul 02504, Republic of Korea.
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Yoo J, Han J, Lim MH. Transition metal ions and neurotransmitters: coordination chemistry and implications for neurodegeneration. RSC Chem Biol 2023; 4:548-563. [PMID: 37547459 PMCID: PMC10398360 DOI: 10.1039/d3cb00052d] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2023] [Accepted: 06/26/2023] [Indexed: 08/08/2023] Open
Abstract
Neurodegeneration is characterized by a disturbance in neurotransmitter-mediated signaling pathways. Recent studies have highlighted the significant role of transition metal ions, including Cu(i/ii), Zn(ii), and Fe(ii/iii), in neurotransmission, thereby making the coordination chemistry of neurotransmitters a growing field of interest in understanding signal dysfunction. This review outlines the physiological functions of transition metal ions and neurotransmitters, with the metal-binding properties of small molecule-based neurotransmitters and neuropeptides. Additionally, we discuss the structural and conformational changes of neurotransmitters induced by redox-active metal ions, such as Cu(i/ii) and Fe(ii/iii), and briefly describe the outcomes arising from their oxidation, polymerization, and aggregation. These observations have important implications for neurodegeneration and emphasize the need for further research to develop potential therapeutic strategies.
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Affiliation(s)
- Jeasang Yoo
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea
| | - Jiyeon Han
- Department of Applied Chemistry, University of Seoul Seoul 02504 Republic of Korea
| | - Mi Hee Lim
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea
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5
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Huang D, Lai S, Zhong S, Jia Y. Association between serum copper, zinc, and selenium concentrations and depressive symptoms in the US adult population, NHANES (2011-2016). BMC Psychiatry 2023; 23:498. [PMID: 37434135 DOI: 10.1186/s12888-023-04953-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/04/2023] [Accepted: 06/13/2023] [Indexed: 07/13/2023] Open
Abstract
BACKGROUND Evidence suggests that alterations in serum trace element concentrations are closely associated with mental illness. However, studies on the relationship between serum copper, zinc, and selenium concentrations and depressive symptoms are limited and with controversial results. We aimed to investigate the association between serum concentrations of these trace elements and depressive symptoms in US adults. METHODS Data from the National Health and Nutrition Examination Survey (NHANES) (2011-2016) were used in this cross-sectional study. The Patient Health Questionnaire-9 Items (PHQ-9) was employed to assess depressive symptoms. Multiple logistic regression was performed to determine the relationship between the serum concentrations of copper, zinc, and selenium and depressive symptoms. RESULTS A total of 4552 adults were included. Subjects with depressive symptoms had higher serum copper concentrations (123.88 ± 1.87) than those without depressive symptoms (116.99 ± 0.86) (p < 0.001). In Model 2, weighted logistic regression analysis showed that the second (Q2) quartile of zinc concentrations (odds ratio [OR] = 1.534, 95% confident interval [CI]: 1.018 to 2.313) were significantly associated with an increased risk of depressive symptoms. Subgroup analysis revealed that the third (Q3) and fourth (Q4) quartiles of copper concentrations (Q3: OR = 2.699, 95% CI: 1.285 to 5.667; Q4: OR = 2.490, 95% CI: 1.026 to 6.046) were also positively associated with depressive symptoms in obese individuals after controlling for all confounders. However, no significant relationship between serum selenium concentrations and depressive symptoms was observed. CONCLUSIONS Obese US adults with high serum copper concentrations, as well as US adults in general with low serum zinc concentrations, were susceptible to depressive symptoms. Nevertheless, the causal mechanisms underlying these relationships need to be further explored.
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Affiliation(s)
- Dong Huang
- Department of Psychiatry, First Affiliated Hospital of Jinan University, Guangzhou, 510630, China
| | - Shunkai Lai
- Department of Psychiatry, First Affiliated Hospital of Jinan University, Guangzhou, 510630, China
| | - Shuming Zhong
- Department of Psychiatry, First Affiliated Hospital of Jinan University, Guangzhou, 510630, China
| | - Yanbin Jia
- Department of Psychiatry, First Affiliated Hospital of Jinan University, Guangzhou, 510630, China.
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Lettieri M, Scarano S, Caponi L, Bertolini A, Saba A, Palladino P, Minunni M. Serotonin-Derived Fluorophore: A Novel Fluorescent Biomaterial for Copper Detection in Urine. SENSORS (BASEL, SWITZERLAND) 2023; 23:3030. [PMID: 36991740 PMCID: PMC10055690 DOI: 10.3390/s23063030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 03/08/2023] [Accepted: 03/09/2023] [Indexed: 06/19/2023]
Abstract
We took advantage of the fluorescent features of a serotonin-derived fluorophore to develop a simple and low-cost assay for copper in urine. The quenching-based fluorescence assay linearly responds within the concentration range of clinical interest in buffer and in artificial urine, showing very good reproducibility (CVav% = 4% and 3%) and low detection limits (16 ± 1 μg L-1 and 23 ± 1 μg L-1). The Cu2+ content was also estimated in human urine samples, showing excellent analytical performances (CVav% = 1%), with a limit of detection of 59 ± 3 μg L-1 and a limit of quantification of 97 ± 11 μg L-1, which are below the reference value for a pathological Cu2+ concentration. The assay was successfully validated through mass spectrometry measurements. To the best of our knowledge, this is the first example of copper ion detection exploiting the fluorescence quenching of a biopolymer, offering a potential diagnostic tool for copper-dependent diseases.
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Affiliation(s)
- Mariagrazia Lettieri
- Department of Chemistry ‘Ugo Schiff’, University of Florence, 50019 Sesto Fiorentino, Italy
| | - Simona Scarano
- Department of Chemistry ‘Ugo Schiff’, University of Florence, 50019 Sesto Fiorentino, Italy
| | - Laura Caponi
- Laboratory of Clinical Pathology, University Hospital of Pisa, 56126 Pisa, Italy
| | - Andrea Bertolini
- Department of Surgical, Medical and Molecular Pathology and Critical Care Medicine, University of Pisa, 56126 Pisa, Italy
| | - Alessandro Saba
- Laboratory of Clinical Pathology, University Hospital of Pisa, 56126 Pisa, Italy
- Department of Surgical, Medical and Molecular Pathology and Critical Care Medicine, University of Pisa, 56126 Pisa, Italy
| | - Pasquale Palladino
- Department of Chemistry ‘Ugo Schiff’, University of Florence, 50019 Sesto Fiorentino, Italy
| | - Maria Minunni
- Department of Chemistry ‘Ugo Schiff’, University of Florence, 50019 Sesto Fiorentino, Italy
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Jayawardena BM, Menon R, Jones MR, Jones CE. Spectral Phasor Analysis of Nile Red Identifies Membrane Microenvironment Changes in the Presence of Amyloid Peptides. Cell Biochem Biophys 2023; 81:19-27. [PMID: 36203076 DOI: 10.1007/s12013-022-01105-0] [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: 05/22/2022] [Accepted: 09/24/2022] [Indexed: 11/29/2022]
Abstract
The interaction of protein and peptide amyloid oligomers with membranes is thought to be one of the mechanisms contributing to cellular toxicity. However, techniques to study these interactions in the complex membrane environment of live cells are lacking. Spectral phasor analysis is a recently developed biophysical technique that can enable visualisation and analysis of membrane-associated fluorescent dyes. When the spectral profile of these dyes changes as a result of changes to the membrane microenvironment, spectral phasor analysis can localise those changes to discrete membrane regions. In this study, we investigated whether spectral phasor analysis could detect changes in the membrane microenvironment of live cells in the presence of fibrillar aggregates of the disease-related Aβ42 peptide or the functional amyloid neurokinin B. Our results show that the fibrils cause distinct changes to the microenvironment of nile red associated with both the plasma and the nuclear membrane. We attribute these shifts in nile red spectral properties to changes in membrane fluidity. Results from this work suggest that cells have mechanisms to avoid or control membrane interactions arising from functional amyloids which have implications for how these peptides are stored in dense core vesicles. Furthermore, the work highlights the utility of spectral phasor analysis to monitor microenvironment changes to fluorescent probes in live cells.
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Affiliation(s)
- Bhawantha M Jayawardena
- School of Science, Western Sydney University, Locked Bag 1797, Penrith, 2751, NSW, Australia
| | - Resmi Menon
- School of Science, Western Sydney University, Locked Bag 1797, Penrith, 2751, NSW, Australia.,PYC Therapeutics, QEII Medical Centre, 6 Verdun St, Nedlands, 6009, WA, Australia
| | - Mark R Jones
- School of Science, Western Sydney University, Locked Bag 1797, Penrith, 2751, NSW, Australia
| | - Christopher E Jones
- School of Science, Western Sydney University, Locked Bag 1797, Penrith, 2751, NSW, Australia.
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Hui Y, Guo G, Mao L, Li Y, Sun M, Wang X, Yang W, Fan X, Jiang K, Cui B, Sun C. Associations of Multiple Serum Trace Elements with Abnormal Sleep Duration Patterns in Hospitalized Patient with Cirrhosis. Biol Trace Elem Res 2022; 201:3202-3209. [PMID: 36136288 DOI: 10.1007/s12011-022-03425-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 09/14/2022] [Indexed: 11/02/2022]
Abstract
The associations of circulating trace elements with sleep health have attracted increasing attention given their potential link. However, there is scant data on the relationship between serum trace elements and abnormal sleep duration patterns in cirrhosis. We aimed to investigate these associations with the purpose of identifying modifiable risk factors. The blood samples were collected from inpatients with cirrhosis, and serum levels of several trace elements were assessed by inductively coupled plasma mass spectrometry. Self-reported sleep duration was categorized to short- (< 7 h/night), optimal (7-8 h/night), and long-sleep duration (> 8 h/night). The dose-response trends and associations of trace elements levels with sleep duration were determined by restricted cubic splines (RCS) and logistic regression, respectively. Cirrhotic patients with optimal sleep duration experienced the highest levels of serum Zinc (Zn) and the lowest values of copper to zinc ratio (CZr). RCS model corroborated non-linear associations of serum Zn and CZr against sleep duration. Multiple regression analysis showed that both CZr (short vs optimal sleep duration: OR 4.785, P < 0.001; long vs optimal sleep duration: OR 4.150, P = 0.019) and serum Zn levels (short vs optimal sleep duration: OR 0.985, P = 0.040; long vs optimal sleep duration: OR 0.956, P = 0.008) serve as independent risk factors for sleep duration abnormalities. In conclusion, our findings unraveled a close relationship of serum Zn and CZr with sleep duration in cirrhosis. Further trace element-based therapy such as Zn supplementation may be novel approach to reverse this sleep problem.
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Affiliation(s)
- Yangyang Hui
- Department of Gastroenterology and Hepatology, Tianjin Medical University General Hospital, Heping District, Anshan Road 154, Tianjin, 300052, China
- Tianjin Institute of Digestive Disease, Tianjin Medical University General Hospital, Heping District, Anshan Road 154, Tianjin, 300052, China
| | - Gaoyue Guo
- Department of Gastroenterology and Hepatology, Tianjin Medical University General Hospital, Heping District, Anshan Road 154, Tianjin, 300052, China
- Tianjin Institute of Digestive Disease, Tianjin Medical University General Hospital, Heping District, Anshan Road 154, Tianjin, 300052, China
| | - Lihong Mao
- Department of Gastroenterology and Hepatology, Tianjin Medical University General Hospital, Heping District, Anshan Road 154, Tianjin, 300052, China
- Tianjin Institute of Digestive Disease, Tianjin Medical University General Hospital, Heping District, Anshan Road 154, Tianjin, 300052, China
| | - Yifan Li
- Department of Gastroenterology and Hepatology, Tianjin Medical University General Hospital, Heping District, Anshan Road 154, Tianjin, 300052, China
- Tianjin Institute of Digestive Disease, Tianjin Medical University General Hospital, Heping District, Anshan Road 154, Tianjin, 300052, China
| | - Mingyu Sun
- Department of Gastroenterology and Hepatology, Tianjin Medical University General Hospital, Heping District, Anshan Road 154, Tianjin, 300052, China
- Tianjin Institute of Digestive Disease, Tianjin Medical University General Hospital, Heping District, Anshan Road 154, Tianjin, 300052, China
| | - Xiaoyu Wang
- Department of Gastroenterology and Hepatology, Tianjin Medical University General Hospital, Heping District, Anshan Road 154, Tianjin, 300052, China
- Tianjin Institute of Digestive Disease, Tianjin Medical University General Hospital, Heping District, Anshan Road 154, Tianjin, 300052, China
| | - Wanting Yang
- Department of Gastroenterology and Hepatology, Tianjin Medical University General Hospital, Heping District, Anshan Road 154, Tianjin, 300052, China
- Tianjin Institute of Digestive Disease, Tianjin Medical University General Hospital, Heping District, Anshan Road 154, Tianjin, 300052, China
| | - Xiaofei Fan
- Department of Gastroenterology and Hepatology, Tianjin Medical University General Hospital, Heping District, Anshan Road 154, Tianjin, 300052, China
- Tianjin Institute of Digestive Disease, Tianjin Medical University General Hospital, Heping District, Anshan Road 154, Tianjin, 300052, China
| | - Kui Jiang
- Department of Gastroenterology and Hepatology, Tianjin Medical University General Hospital, Heping District, Anshan Road 154, Tianjin, 300052, China
- Tianjin Institute of Digestive Disease, Tianjin Medical University General Hospital, Heping District, Anshan Road 154, Tianjin, 300052, China
| | - Binxin Cui
- Department of Gastroenterology, Tianjin Medical University General Hospital Airport Hospital, Tianjin Airport Economic Area, East Street 6, Tianjin, 300308, China
| | - Chao Sun
- Department of Gastroenterology and Hepatology, Tianjin Medical University General Hospital, Heping District, Anshan Road 154, Tianjin, 300052, China.
- Tianjin Institute of Digestive Disease, Tianjin Medical University General Hospital, Heping District, Anshan Road 154, Tianjin, 300052, China.
- Department of Gastroenterology, Tianjin Medical University General Hospital Airport Hospital, Tianjin Airport Economic Area, East Street 6, Tianjin, 300308, China.
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Wang W, Voss KM, Liu J, Gordeev MF. Nonclinical Evaluation of Antibacterial Oxazolidinones Contezolid and Contezolid Acefosamil with Low Serotonergic Neurotoxicity. Chem Res Toxicol 2021; 34:1348-1354. [PMID: 33913699 DOI: 10.1021/acs.chemrestox.0c00524] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Linezolid, the principal oxazolidinone antibiotic for therapy of Gram-positive infections, is limited by its myelosuppression and monoamine oxidase (MAO) inhibition, with the latter manifested as serotonergic neurotoxicity. The oral oxazolidinone contezolid and its injectable prodrug contezolid acefosamil are developed to overcome the above limitations. Serotonergic profiles for contezolid in vitro and for orally administered contezolid acefosamil in rodents are reported. Contezolid exhibited 2- and 148-fold reduction over linezolid reversible inhibition of MAO-A and MAO-B human enzyme isoforms. In the mouse head-twitch model, contezolid acefosamil was devoid of neurotoxicity at supratherapeutic oral doses of 40, 80, and 120 mg/kg. In the rat tyramine challenge model, no significant increase in arterial blood pressure was observed for contezolid acefosamil up to 120 mg/kg oral dosing. In these tests, the comparator linezolid has elicited serotonergic responses. Thus, contezolid and contezolid acefosamil exhibited an attenuated propensity to induce MAO-related serotonergic neurotoxicity. The data support a continued clinical evaluation of these agents, with potential to expand oxazolidinone therapies to patient populations on concurrent selective serotonin reuptake inhibitor medications or where MAO inhibitors are contraindicated.
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Affiliation(s)
- Wen Wang
- MicuRx Pharmaceuticals Inc., Foster City, California 94404, United States
| | - Kate M Voss
- Charles River Laboratories, Ashland, Ohio 44805, United States
| | - Jinqian Liu
- MicuRx Pharmaceuticals Inc., Foster City, California 94404, United States
| | - Mikhail F Gordeev
- MicuRx Pharmaceuticals Inc., Foster City, California 94404, United States
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10
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Menon R, Christofides K, Jones CE. Endocytic recycling prevents copper accumulation in astrocytoma cells stimulated with copper-bound neurokinin B. Biochem Biophys Res Commun 2020; 523:739-744. [PMID: 31952788 DOI: 10.1016/j.bbrc.2019.12.087] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Accepted: 12/24/2019] [Indexed: 12/25/2022]
Abstract
Neurokinin B (NKB) is a key neuropeptide in reproductive endocrinology where it contributes to the generation of pulses of gonadotropin-releasing hormone. NKB is a copper-binding peptide; in the absence of metal NKB rapidly adopts an amyloid structure, but copper binding inhibits amyloid formation and generates a structure that can activate the neurokinin 3 receptor. The fate of copper once it binds NKB and activates the neurokinin 3 receptor is not understood, but endocytosis of NKB occurs even when the peptide is coordinated to copper. Using astrocytoma cells that express endogenous neurokinin 3 receptor, this work shows that endocytosis of apo- and copper-bound NKB occurs in concert with the receptor via a trafficking pathway that includes the early endosome. When cells are stimulated with copper-bound NKB the cellular copper concentration does not significantly increase, however when the cells are pre-treated with the recycling inhibitor, brefeldin A, they are capable of accumulating copper. This data shows that copper-bound NKB can activate the neurokinin 3 receptor then endocytosis abstracts metal, peptide and receptor from the cell surface. The cell does not accumulate the copper but instead it enters recycling pathways that ultimately leads to metal release from the cell. The work reveals a novel receptor-mediated copper trafficking pathway that retains metal in membrane bound organelles until it is exported from the cell.
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Affiliation(s)
- Resmi Menon
- School of Science, Western Sydney University, Locked bag 1797, Penrith, 2759, New South Wales, Australia
| | - Katerina Christofides
- School of Science, Western Sydney University, Locked bag 1797, Penrith, 2759, New South Wales, Australia
| | - Christopher E Jones
- School of Science, Western Sydney University, Locked bag 1797, Penrith, 2759, New South Wales, Australia.
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11
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Saito K, Watanabe K, Yanaoka R, Kageyama L, Miura T. Potential role of serotonin as a biological reductant associated with copper transportation. J Inorg Biochem 2019; 199:110770. [PMID: 31336257 DOI: 10.1016/j.jinorgbio.2019.110770] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Revised: 06/21/2019] [Accepted: 07/11/2019] [Indexed: 11/17/2022]
Abstract
Serotonin (5-HT) is a neurotransmitter that is derived from tryptophan. Owing to a hydroxyl group attached to the indole nucleus, 5-HT exhibits a considerably higher redox activity than tryptophan. To gain insight into the biological relevance of the redox activity of 5-HT, the effect of Cu(I)-binding ligands on the 5-HT-mediated copper reduction was investigated. The d-d transition band of Cu(II) complexed with glycine [Cu(II)-Gly2] was not affected by addition of 5-HT alone but was diminished when a thioether-containing compound coexists with 5-HT. Concomitant with disappearance of the d-d transition band of Cu(II)-Gly2, the π-π* transition band of 5-hydroxyindole of 5-HT exhibits a red-shift which is consistently explained by oxidation of 5-HT and subsequent formation of a dimeric species. The redox reactions between 5-HT and copper are also accelerated by a peptide composed of a methionine (Met)-rich region in the extracellular domain of an integral membrane protein, copper transporter 1 (Ctr1). Since Ctr1 transports copper across the plasma membrane with specificity for Cu(I), reduction of extracellular Cu(II) to Cu(I) is required for copper uptake by Ctr1. Metalloreductases that can donate Cu(I) for Ctr1 have been identified in yeast but not yet been found in mammals. The results of this study indicate that the Met-rich region in the N-terminal extracellular domain of Ctr1 promotes the 5-HT-mediated Cu(II) reduction in order to acquire Cu(I) via a non-enzymatic process.
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Affiliation(s)
- Kaede Saito
- Department of Pharmaceutical Sciences, International University of Health and Welfare, Kitakanemaru 2600-1, Otawara, Tochigi 324-8501, Japan
| | - Kasumi Watanabe
- Department of Pharmaceutical Sciences, International University of Health and Welfare, Kitakanemaru 2600-1, Otawara, Tochigi 324-8501, Japan
| | - Risa Yanaoka
- Department of Pharmaceutical Sciences, International University of Health and Welfare, Kitakanemaru 2600-1, Otawara, Tochigi 324-8501, Japan
| | - Lisa Kageyama
- Department of Pharmaceutical Sciences, International University of Health and Welfare, Kitakanemaru 2600-1, Otawara, Tochigi 324-8501, Japan
| | - Takashi Miura
- Department of Pharmaceutical Sciences, International University of Health and Welfare, Kitakanemaru 2600-1, Otawara, Tochigi 324-8501, Japan.
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12
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Association between Lower Intake of Minerals and Depressive Symptoms among Elderly Japanese Women but Not Men: Findings from Shika Study. Nutrients 2019; 11:nu11020389. [PMID: 30781841 PMCID: PMC6412241 DOI: 10.3390/nu11020389] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Revised: 02/05/2019] [Accepted: 02/06/2019] [Indexed: 12/23/2022] Open
Abstract
The aim of this cross-sectional study was to examine the relationship of mineral intake, including sodium, potassium, calcium, magnesium, phosphorus, iron, zinc, copper and manganese, with depressive symptoms in both genders in the Japanese elderly population. A total of 1423 participants who were older than 65 years old were recruited in this study. Mineral intake was analyzed using a validated and brief self-administered diet history questionnaire. Depressive symptoms were assessed with a short version of the Geriatric Depression Scale. A logistic regression model was applied to determine the relationship between mineral intake and depressive symptoms. The prevalence of depressive symptoms was 20%. Except for sodium and manganese, mineral intake was significantly lower in the depressive symptoms group. There was no difference of mineral intake between male participants with depressive symptoms and those without such symptoms. However, in female participants, mineral intake was significantly lower in participants with depressive symptoms compared to those without such symptoms. Potassium, calcium, magnesium, phosphorus, iron, zinc, and copper were significantly and negatively correlated with depressive symptoms among female participants, but not male participants. Our results suggest that the deficiencies in mineral intake may be related to depressive symptoms, especially in women.
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Lamtai M, Ouakki S, Zghari O, Mesfioui A, El Hessni A, Ouichou A. Affective Behavior Dysregulation Was Induced by Chronic Administration of Copper in Wistar Rats. ACTA ACUST UNITED AC 2019. [DOI: 10.4236/nm.2019.102009] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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14
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Polysaccharide-mediated synthesis of melanins from serotonin and other 5-hydroxy indoles. Future Sci OA 2018; 4:FSO280. [PMID: 29568569 PMCID: PMC5859343 DOI: 10.4155/fsoa-2017-0118] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Accepted: 12/14/2017] [Indexed: 11/24/2022] Open
Abstract
Aim: As a continuation of our research on the melanin formation from catecholamines, we studied the polysaccharide-mediated oxidation of serotonin and other 5-hydroxy indoles into melanin-like materials. As for the catecholamines, we observed that many polysaccharides promote the oxidation of such compounds, particularly in the presence of Cu2+. Methodology: The reactions were monitored using reverse phase-HPLC and size-exclusion chromatography techniques. Melanin-like materials were purified through dialysis and characterized using UV-Vis and Fourier transform IR spectroscopic techniques. Results: One such material, synthesized from chondroitin sulfate type A and serotonin in the presence of Cu2+ was found to affect the release of IL-1β and IL-6 cytokines from immune cells. The manuscript details our study of the formation of melanin-like pigments from serotonin in the presence of select polysaccharides. Melanin-like pigments have been observed in the brain and their presence is related to pathologies like Parkinson's disease. The melanin-like pigments observed in brain cells are derived from catecholamines like dopamine or norepinephrine. Our research suggests that another important brain compound, serotonin, may make contributions to the appearance of melanin-like pigments in brain tissues.
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15
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Bhattacharjee A, Chakraborty K, Shukla A. Cellular copper homeostasis: current concepts on its interplay with glutathione homeostasis and its implication in physiology and human diseases. Metallomics 2018; 9:1376-1388. [PMID: 28675215 DOI: 10.1039/c7mt00066a] [Citation(s) in RCA: 65] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Copper is a trace element essential for almost all living organisms. But the level of intracellular copper needs to be tightly regulated. Dysregulation of cellular copper homeostasis leading to various diseases demonstrates the importance of this tight regulation. Copper homeostasis is regulated not only within the cell but also within individual intracellular compartments. Inactivation of export machinery results in excess copper being redistributed into various intracellular organelles. Recent evidence suggests the involvement of glutathione in playing an important role in regulating copper entry and intracellular copper homeostasis. Therefore interplay of both homeostases might play an important role within the cell. Similar to copper, glutathione balance is tightly regulated within individual cellular compartments. This review explores the existing literature on the role of glutathione in regulating cellular copper homeostasis. On the one hand, interplay of glutathione and copper homeostasis performs an important role in normal physiological processes, for example neuronal differentiation. On the other hand, perturbation of the interplay might play a key role in the pathogenesis of copper homeostasis disorders.
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Abstract
Circadian rhythms describe the behavioral and physiological changes that occur in living organisms in order to attune to a 24 hour cycle of day and night. The most striking aspect of circadian function is the sleep-wake cycle, however many other physiological processes are regulated in 24 hour oscillations, including blood pressure, body temperature, appetite, urine production, and the transcription and translation of thousands of circadian dependent genes. Circadian disruption and sleep disorders are strongly connected to neurodegenerative diseases including Parkinson's disease, Alzheimer's disease, and Huntington's disease as well as others. Metal exposures have been implicated in neurodegenerative diseases, in some cases involving metals that are essential micronutrients but are toxic at high levels of exposure (such as manganese, copper, and zinc), and in other cases involving metals that have no biological role but are toxic to living systems (such as lead, mercury, and aluminum). In this review, we examine the evidence for circadian and sleep disorders with exposures to these metals and review the literature for possible mechanisms. We suggest that giving the aging population, the prevalence of environmental exposures to metals, and the increasing prevalence of neurodegenerative disease in the aged, more research into the mechanisms of circadian disruption subsequent to metal exposures is warranted.
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Affiliation(s)
- Nancy L Parmalee
- Albert Einstein College of Medicine, Department of Molecular Pharmacology, 1300 Morris Park Avenue, Bronx, New York, USA
| | - Michael Aschner
- Albert Einstein College of Medicine, Department of Molecular Pharmacology, 1300 Morris Park Avenue, Bronx, New York, USA
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17
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Shahzad R, Jones MR, Viles JH, Jones CE. Endocytosis of the tachykinin neuropeptide, neurokinin B, in astrocytes and its role in cellular copper uptake. J Inorg Biochem 2016; 162:319-325. [PMID: 26948444 DOI: 10.1016/j.jinorgbio.2016.02.027] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2015] [Revised: 01/27/2016] [Accepted: 02/25/2016] [Indexed: 01/06/2023]
Abstract
The tachykinin neuropeptide, neurokinin B (NKB), belongs to a family of peptides having diverse roles in the brain. NKB, along with several other tachykinins, has been identified as a copper-binding peptide, however the physiological relevance of the binding is unclear. Previously, NKB was shown to limit the ability of copper to enter astrocytes and disrupt calcium homeostasis and it was thought that the peptide was sequestering the metal extracellularly. Here we use a fluorescein-labelled NKB peptide (F-NKB) to show that NKB is not retained extracellularly, but is endocytosed within 10-20min after addition to the cell media. The endocytosis is not inhibited when NKB is delivered as a copper-complex, [CuII(F-NKB)2]. Endocytosis of NKB can increase intracellular copper. Comparison to cells cultured in copper-free buffer indicated that apo-NKB can facilitate uptake of copper found in normal culture media. To achieve this NKB must compete with a variety of copper proteins, and we show that NKB can successfully compete with copper-binding peptides derived from the prion protein, itself associated with Cu(II) and Zn(II) metabolism. We suggest a mechanism of receptor mediated endocytosis to account for the observations.
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Affiliation(s)
- Reeha Shahzad
- The School of Science and Health, Western Sydney University, Locked Bag 1797, Penrith, 2759, NSW, Australia
| | - Mark R Jones
- The School of Science and Health, Western Sydney University, Locked Bag 1797, Penrith, 2759, NSW, Australia
| | - John H Viles
- School of Biological and Chemical Sciences, Queen Mary University of London, Mile End Road, London E1 4NS, UK
| | - Christopher E Jones
- The School of Science and Health, Western Sydney University, Locked Bag 1797, Penrith, 2759, NSW, Australia.
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18
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Dai Z, Chauhan S, Green TK. Synthesis and enantioseparation of atropisomers of serotonin dimer. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.04.127] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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19
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Kato Y, Ono S, Kitamoto N, Kettle AJ. Covalent modification of cytoskeletal proteins in neuronal cells by tryptamine-4,5-dione. Redox Biol 2014; 2:983-90. [PMID: 25460734 PMCID: PMC4215393 DOI: 10.1016/j.redox.2014.08.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2014] [Accepted: 08/13/2014] [Indexed: 11/17/2022] Open
Abstract
Serotonin, 5-hydroxytryptamine, is a systemic bioactive amine that acts in the gut and brain. As a substrate of myeloperoxidase in vitro, serotonin is oxidized to tryptamine-4,5-dione (TD), which is highly reactive with thiols. In this work, we successively prepared a monoclonal antibody to quinone-modified proteins and found that the antibody preferentially recognizes the TD–thiol adduct. Using the antibody, we observed that the chloride ion, the predominant physiological substrate for myeloperoxidase in vivo, is not competitive toward the enzyme catalyzed serotonin oxidation process, suggesting that serotonin is a plausible physiological substrate for the enzyme in vivo. Immunocytochemical analyses revealed that TD staining was observed in the cytosol of SH-SY5Y neuroblastoma cells while blot analyses showed that some cellular proteins were preferentially modified. Pull-down analyses confirmed that the cytoskeletal proteins tubulins, vimentin, and neurofilament-L were modified. When pure tubulins were exposed to micromolar levels of synthetic TD, self-polymerization was initially enhanced and then suppressed. These results suggest that serotonin oxidation by myeloperoxidase or the action of other oxidants could cause functional alteration of cellular proteins, which may be related to neurodegeneration processes or irritable bowel syndrome. Antibody to quinone-modified protein was established and characterized. Modification of protein by quinone was dependent on myeloperoxidase but independent of chloride ion concentration. We immunochemically found that cellular proteins were preferentially modified. Quinone modulated polymerization of tubulins in vitro.
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Affiliation(s)
- Yoji Kato
- School of Human Science and Environment, University of Hyogo, Hyogo 670-0092, Japan.
| | - Shigeki Ono
- School of Human Science and Environment, University of Hyogo, Hyogo 670-0092, Japan.
| | - Noritoshi Kitamoto
- School of Human Science and Environment, University of Hyogo, Hyogo 670-0092, Japan.
| | - Anthony J Kettle
- Centre for Free Radical Research, Department of Pathology, University of Otago, Christchurch, New Zealand.
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20
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Harris KD, Weiss M, Zahavi A. Why are neurotransmitters neurotoxic? An evolutionary perspective. F1000Res 2014; 3:179. [PMID: 25580225 PMCID: PMC4288432 DOI: 10.12688/f1000research.4828.2] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 12/01/2014] [Indexed: 02/02/2023] Open
Abstract
In the CNS, minor changes in the concentration of neurotransmitters such as glutamate or dopamine can lead to neurodegenerative diseases. We present an evolutionary perspective on the function of neurotransmitter toxicity in the CNS. We hypothesize that neurotransmitters are selected because of their toxicity, which serves as a test of neuron quality and facilitates the selection of neuronal pathways. This perspective may offer additional explanations for the reduction of neurotransmitter concentration in the CNS with age, and suggest an additional role for the blood-brain barrier. It may also suggest a connection between the specific toxicity of the neurotransmitters released in a specific region of the CNS, and elucidate their role as chemicals that are optimal for testing the quality of cells in that region.
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Affiliation(s)
- Keith D Harris
- Department of Zoology, Tel-Aviv University, Tel Aviv, 69978, Israel
| | - Meital Weiss
- Department of Zoology, Tel-Aviv University, Tel Aviv, 69978, Israel
| | - Amotz Zahavi
- Department of Zoology, Tel-Aviv University, Tel Aviv, 69978, Israel ; Sagol School of Neuroscience, Tel-Aviv University, Tel Aviv, 69978, Israel
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21
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Tamba BI, Leon MM, Petreus T. Common trace elements alleviate pain in an experimental mouse model. J Neurosci Res 2013; 91:554-61. [PMID: 23362003 DOI: 10.1002/jnr.23191] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2012] [Accepted: 11/25/2012] [Indexed: 11/10/2022]
Abstract
Trace elements represent a group of essential metals or metaloids necessary for life, present in minute amounts. Analgesic adjuvants can enhance the effect of other pain drugs or be used for pain control themselves. Previous studies on the effects of trace elements on nociception and their potential use as analgesic adjuvants have yielded conflicting results. In this study, we tested the hypothesis that three vital trace elements (Zn²⁺, Mg²⁺, Cu²⁺) have direct antinociceptive effects. Groups of eight Swiss mice were intraperitoneally (i.p) injected with incremental concentrations of Zn²⁺ sulfate (0.5, 2.0 mg/kg), Zn²⁺ citrate (0.125, 0.5 mg/kg), Mg²⁺ chloride (37.5, 75, 150 mg/kg), Cu²⁺ chloride (0.5, 1.0, 2.0 mg/kg), and Cu²⁺ sulfate (0.5, 1.0 mg/kg) or saline (control). Evaluations were made by hot plate (HP) and tail flick (TF) tests for central antinociceptive effect, writhing test (WT) for visceral antinociceptive effect, and activity cage (AC) test for spontaneous behavior. Zn²⁺ induced pain inhibition in HP/TF tests (up to 17%) and WT (up to 25%), with no significant differences among the salts used. Mg²⁺ salts induced pain inhibition for all performed tests (up to 85% in WT). Cu²⁺ salts showed antinociceptive effects for HP/TF (up to 28.6%) and WT (57.28%). Only Mg²⁺ and Cu²⁺ salts have displayed significant effects in AC (Mg²⁺ anxiolytic/depressant effect; Cu²⁺ anxiolytic effect). We interpret these data to mean that all tested trace elements induced antinociceptive effects in central and visceral pain tests. Our data indicate the potential use of these cheap adjuvants in pain therapy.
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Affiliation(s)
- Bogdan I Tamba
- Centre for the Study and Therapy of Pain, Gr. T. Popa University of Medicine and Pharmacy, Iasi, Romania.
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22
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Song CH, Kim YH, Jung KI. Associations of zinc and copper levels in serum and hair with sleep duration in adult women. Biol Trace Elem Res 2012; 149:16-21. [PMID: 22476977 DOI: 10.1007/s12011-012-9398-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2012] [Accepted: 03/22/2012] [Indexed: 12/28/2022]
Abstract
Zinc (Zn) and copper (Cu) are essential micronutrients involved in numerous metabolic reactions. They are also antagonists of the N-methyl-D-aspartate glutamate (NMDA) receptor in the central nervous system, which mediates mood, cognition, pain perception, and sleep. However, there have been few studies on the effects of Zn and Cu on sleep. A total of 126 adult women were recruited in this cross-sectional study. Zn and Cu levels in the serum and hair were measured for each subject. The participants completed the 7-day physical activity recall questionnaire and the Hospital Anxiety and Depression Scale. The mean hours of sleep were compared according to the tertiles of Zn, Cu, and Zn/Cu ratio in the serum and hair by analyses of covariance. The participants in the middle tertile of Zn and Zn/Cu ratio in the serum had significantly longer sleep duration compared to those in the lowest tertile (p<0.05 for each). An increasing Zn/Cu ratio in the hair was associated with longer sleep hours (p=0.026), whereas sleep duration decreased significantly from the lowest to the highest tertile of hair Cu level (p=0.010). The largest percentage of participants with optimal sleep duration was observed in the highest tertile of Zn/Cu ratio in the serum and hair (p=0.052 and 0.046, respectively). The results of our study suggest that Zn/Cu ratio as well as Zn or Cu levels in the serum and hair may be involved in sleep duration in adult women.
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Affiliation(s)
- Chan-Hee Song
- Department of Family Medicine, College of Medicine, The Catholic University of Korea, Seoul, South Korea
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23
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Kaya MC, Bez Y, Selek S, Fatih Karababa I, Bulut M, Savaş HA, Çelik H, Herken H. No Effect of Antidepressant Treatment on Elevated Serum Ceruloplasmin Level in Patients with First-Episode Depression: A Longitidunal Study. Arch Med Res 2012; 43:294-7. [DOI: 10.1016/j.arcmed.2012.05.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2011] [Accepted: 04/27/2012] [Indexed: 10/28/2022]
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24
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Kanjanaphachoat P, Wei BY, Lo SF, Wang IW, Wang CS, Yu SM, Yen ML, Chiu SH, Lai CC, Chen LJ. Serotonin accumulation in transgenic rice by over-expressing tryptophan decarboxylase results in a dark brown phenotype and stunted growth. PLANT MOLECULAR BIOLOGY 2012; 78:525-43. [PMID: 22297847 DOI: 10.1007/s11103-012-9882-5] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2011] [Accepted: 01/03/2012] [Indexed: 05/08/2023]
Abstract
A mutant M47286 with a stunted growth, low fertility and dark-brown phenotype was identified from a T-DNA-tagged rice mutant library. This mutant contained a copy of the T-DNA tag inserted at the location where the expression of two putative tryptophan decarboxylase genes, TDC-1 and TDC-3, were activated. Enzymatic assays of both recombinant proteins showed tryptophan decarboxylase activities that converted tryptophan to tryptamine, which could be converted to serotonin by a constitutively expressed tryptamine 5' hydroxylase (T5H) in rice plants. Over-expression of TDC-1 and TDC-3 in transgenic rice recapitulated the stunted growth, darkbrown phenotype and resulted in a low fertility similar to M47286. The degree of stunted growth and dark-brown color was proportional to the expression levels of TDC-1 and TDC-3. The levels of tryptamine and serotonin accumulation in these transgenic rice lines were also directly correlated with the expression levels of TDC-1 and TDC-3. A mass spectrometry assay demonstrated that the darkbrown leaves and hulls in the TDC-overexpressing transgenic rice were caused by the accumulation of serotonin dimer and that the stunted growth and low fertility were also caused by the accumulation of serotonin and serotonin dimer, but not tryptamine. These results represent the first evidence that over-expression of TDC results in stunted growth, low fertility and the accumulation of serotonin, which when converted to serotonin dimer, leads to a dark brown plant color.
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25
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Brownrigg TD, Theisen CS, Fibuch EE, Seidler NW. Carnosine protects against the neurotoxic effects of a serotonin-derived melanoid. Neurochem Res 2010; 36:467-75. [PMID: 21153702 DOI: 10.1007/s11064-010-0365-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/05/2010] [Indexed: 11/26/2022]
Abstract
Anesthesia-related postoperative cognitive dysfunction (POCD) leads to morbidity in the elderly. Lipid peroxidative byproducts (i.e. acrolein) accumulate in aging and may play a role. Sevoflurane, an inhaled anesthetic, sequesters acrolein and enhances the formation of a serotonin-derived melanoid (SDM). SDM may be a biologically relevant polymeric melanoid that we previously showed exhibits redox activity and disrupts lipid bilayers. In this study, we examined the toxicity of SDM in cell culture and looked at protection using L-carnosine. SDM's toxic effects were tested on neuronal-like SH-SY5Y cells, causing an exponential decrease in viability, while human dermal fibroblasts were completely resistant to the toxic effects. SDM brought about morphological changes to differentiated SH-SY5Y cells, particularly to neuronal processes. Co- but not pre-treatment with L-carnosine protected differentiated SH-SY5Y cells exposed to SDM. Our mechanism suggests focal sevoflurane-induced sequestration of age-related acrolein leading to SDM synthesis and neuronal impairment, which is prevented by L-carnosine.
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Affiliation(s)
- Tanner D Brownrigg
- Department of Anesthesiology, University of Missouri-Kansas City School of Medicine, 4401 Wornall Road, Kansas City, MO 64111, USA
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26
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Murphy MM, Miller ED, Fibuch EE, Seidler NW. Redox mechanism of neurotoxicity by a serotonin-acrolein polymeric melanoid. Neurotox Res 2010; 19:353-60. [PMID: 20309663 DOI: 10.1007/s12640-010-9173-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2009] [Revised: 02/28/2010] [Accepted: 03/09/2010] [Indexed: 11/26/2022]
Abstract
Postoperative cognitive dysfunction may be associated with the toxic products of lipid peroxidation, such as the α,β-unsaturated aldehyde acrolein, which accumulates in aging. We previously identified an acrolein-mediated, serotonin-derived melanoid product, or SDM. This study further characterizes this putative novel neuromelanin, which is not made from catecholamines. In addition to its strong protein-binding properties, we observed that SDM binds Fe(2+) readily and exhibits complex redox characteristics. SDM may exist as a two-dimensional network of polymers that coalesce into larger entities exhibiting electroactive properties. These observations suggest that SDM may contribute to the decline in cognition due to focal degeneration from SDM-mediated free-radical production. We know that inhalational anesthetics sequester acrolein, which is toxic to neurons, and we propose that the local increase in acrolein depletes serotonin levels and enhances neuronal vulnerability through the production of neuromelanin-like structures, such as SDM.
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Affiliation(s)
- Meghan M Murphy
- Department of Anesthesiology, University of Missouri - Kansas City School of Medicine, 4401 Wornall Road, Kansas City, MO 64111, USA
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27
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Bolin C, Cardozo-Pelaez F. Characterization of oxidized guanosine 5'-triphosphate as a viable inhibitor of soluble guanylyl cyclase. Free Radic Biol Med 2009; 46:828-35. [PMID: 19167482 PMCID: PMC2814594 DOI: 10.1016/j.freeradbiomed.2008.12.021] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/21/2008] [Revised: 11/07/2008] [Accepted: 12/23/2008] [Indexed: 11/30/2022]
Abstract
The guanine base is prone to oxidation by free radicals regardless of the cellular moiety it is bound to. However, under conditions of oxidative stress, 8-oxoguanosine triphosphate (oxo(8)GTP) formation has been shown to occur without oxidation of the guanine base in DNA. In vitro studies have suggested that oxo(8)GTP could impact G-protein signaling and RNA synthesis. Whether increased levels of oxo(8)GTP translate into cellular malfunction is unknown. Data presented herein show that oxo(8)GTP is formed in cell-free preparations as well as in PC12 cells after exposure to physiologically relevant oxidative conditions generated with 10 microM copper sulfate and 1 mM L-ascorbic acid (Cu/Asc). We also determined that oxo(8)GTP has biological activity as a potent inhibitor of nitric oxide-stimulated soluble guanylyl cyclase (sGC). The increase in oxo(8)GTP formation in purified GTP and PC12 cells exposed to Cu/Asc caused a significant reduction in the product of sGC activity, cGMP. This oxidation of GTP was attenuated by the addition of reduced glutathione under these same Cu/Asc conditions, thus preventing the decrease in sGC activity. This suggests that oxo(8)GTP is produced by free radicals in vivo and could have significant impact on cell functions regulated by sGC activity such as synaptic plasticity in the central nervous system.
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Affiliation(s)
- Celeste Bolin
- Department of Pharmaceutical Sciences, Center for Environmental Health Sciences, University of Montana, 32 Campus Dr., Missoula, Montana, USA
| | - Fernando Cardozo-Pelaez
- Department of Pharmaceutical Sciences, Center for Environmental Health Sciences, University of Montana, 32 Campus Dr., Missoula, Montana, USA
- Corresponding Author. Phone: (406) 243-4025. Fax: (406) 243-2807,
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28
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Guillot TS, Miller GW. Protective actions of the vesicular monoamine transporter 2 (VMAT2) in monoaminergic neurons. Mol Neurobiol 2009; 39:149-70. [PMID: 19259829 DOI: 10.1007/s12035-009-8059-y] [Citation(s) in RCA: 123] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2008] [Accepted: 02/18/2009] [Indexed: 12/13/2022]
Abstract
Vesicular monoamine transporters (VMATs) are responsible for the packaging of neurotransmitters such as dopamine, serotonin, norepinephrine, and epinephrine into synaptic vesicles. These proteins evolved from precursors in the major facilitator superfamily of transporters and are among the members of the toxin extruding antiporter family. While the primary function of VMATs is to sequester neurotransmitters within vesicles, they can also translocate toxicants away from cytosolic sites of action. In the case of dopamine, this dual role of VMAT2 is combined-dopamine is more readily oxidized in the cytosol where it can cause oxidative stress so packaging into vesicles serves two purposes: neurotransmission and neuroprotection. Furthermore, the deleterious effects of exogenous toxicants on dopamine neurons, such as MPTP, can be attenuated by VMAT2 activity. The active metabolite of MPTP can be kept within vesicles and prevented from disrupting mitochondrial function thereby sparing the dopamine neuron. The highly addictive drug methamphetamine is also neurotoxic to dopamine neurons by using dopamine itself to destroy the axon terminals. Methamphetamine interferes with vesicular sequestration and increases the production of dopamine, escalating the amount in the cytosol and leading to oxidative damage of terminal components. Vesicular transport seems to resist this process by sequestering much of the excess dopamine, which is illustrated by the enhanced methamphetamine neurotoxicity in VMAT2-deficient mice. It is increasingly evident that VMAT2 provides neuroprotection from both endogenous and exogenous toxicants and that while VMAT2 has been adapted by eukaryotes for synaptic transmission, it is derived from phylogenetically ancient proteins that originally evolved for the purpose of cellular protection.
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Affiliation(s)
- Thomas S Guillot
- Center for Neurodegenerative Disease, Emory University, Atlanta, GA, USA
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Virit O, Selek S, Bulut M, Savas HA, Celik H, Erel O, Herken H. High ceruloplasmin levels are associated with obsessive compulsive disorder: a case control study. Behav Brain Funct 2008; 4:52. [PMID: 19017404 PMCID: PMC2596773 DOI: 10.1186/1744-9081-4-52] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2008] [Accepted: 11/18/2008] [Indexed: 11/10/2022] Open
Abstract
Background Alterations in ceruloplasmin are currently assumed as one of the mechanisms underlying the development of a number of neurodegenerative disorders. Several studies indicate that elevated serum ceruloplasmin levels may play a role in schizophrenia by exacerbating or perpetuating dopaminergic dysregulation. No study investigating the relationship between ceruloplasmin and obsessive-compulsive disorder (OCD) has been published to date. Nowadays OCD is increasingly speculated to be a different disorder than other anxiety disorders, and rather is considered to be more similar to psychotic disorders. The objective of this study to explore whether there is an association of ceruloplasmin with OCD as in schizophrenia. Method 26 pure OCD and 9 co-morbid OCD patients from Gaziantep University Sahinbey Research Hospital, Psychiatry Clinics, diagnosed according to the DSM IV and 40 healthy controls were included in the study. Blood samples were collected; ceruloplasmin levels were measured. Results The mean ceruloplasmin level in pure OCD patients, co-morbid OCD patients, and control group persons were 544.46 ± 26.53, 424.43 ± 31.50 and 222.35 ± 8.88 U/L respectively. Results of all 3 groups differ significantly. Positive predictive value of ceruloplasmin for that cut-off point is 31/31 (100%) and negative predictive value is 40/44 (91%) in our group. Conclusion Although the nature of relationship is not clear there was an association between ceruloplasmin levels and OCD in our study.
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Affiliation(s)
- Osman Virit
- Department of Psychiatry, Kahramanmaras State Hospital, Kahramanmaras, Turkey.
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