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Huang L, Lin R, Zhang C, Zheng S, Wang Y, Wu Z, Chen S, Shen Y, Zhang G, Qi Y, Lin L. The Neuroprotective and Anxiolytic Effects of Magnesium Sulfate on Retinal Dopaminergic Neurons in 6-OHDA-Induced Parkinsonian Rats: A Pilot Study. Brain Sci 2024; 14:861. [PMID: 39335357 PMCID: PMC11430011 DOI: 10.3390/brainsci14090861] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2024] [Revised: 08/15/2024] [Accepted: 08/22/2024] [Indexed: 09/30/2024] Open
Abstract
This study investigates the protective effects of magnesium sulfate on dopamine neurons in the retinas of rats with 6-hydroxydopamine (6-OHDA)-induced Parkinson's disease (PD). Rapidly progressing cognitive decline often precedes or coincides with the motor symptoms associated with PD. PD patients also frequently exhibit visual function abnormalities. However, the specific mechanisms underlying visual dysfunction in PD patients are not yet fully understood. Therefore, this study aims to investigate whether magnesium homeostasis affects dopaminergic neurons in the retina of PD rats. Thirty-six rats were divided into four groups: (1) control, (2) control with magnesium sulfate (control/MgSO4), (3) Parkinson's disease (PD), and (4) Parkinson's disease with magnesium sulfate (PD/MgSO4). The apomorphine-induced (APO) rotation test assessed the success of the PD models. The open-field experiment measured the rats' anxiety levels. Tyrosine hydroxylase (TH) and glutamate levels, indicators of dopamine neuron survival, were detected using immunofluorescence staining. Protein levels of solute carrier family 41 A1 (SCL41A1), magnesium transporter 1 (MagT1), and cyclin M2 (CNNM2) in the retina were analyzed using Western blot. Results showed that, compared to the PD group, rats in the PD/MgSO4 group had improved psychological states and motor performance at two and four weeks post-surgery. The PD/MgSO4 group also exhibited significantly higher TH fluorescence intensity in the left retinas and lower glutamate fluorescence intensity than the PD group. Additional experiments indicated that the protein levels of SLC41A1, MagT1, and CNNM2 were generally higher in the retinas of the PD/MgSO4 group, along with an increase in retinal magnesium ion content. This suggests that magnesium sulfate may reduce glutamate levels and protect dopamine neurons in the retina. Thus, magnesium sulfate might have therapeutic potential for visual functional impairments in PD patients.
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Affiliation(s)
- Leyi Huang
- Department of Biochemistry and Molecular Biology, Fujian Medical University, Fuzhou 350122, China; (L.H.); (R.L.); (C.Z.); (G.Z.); (Y.Q.)
- Key Laboratory of Brain Aging and Neurodegenerative Disease, Fujian Medical University, Fuzhou 350122, China
| | - Renxi Lin
- Department of Biochemistry and Molecular Biology, Fujian Medical University, Fuzhou 350122, China; (L.H.); (R.L.); (C.Z.); (G.Z.); (Y.Q.)
- Key Laboratory of Brain Aging and Neurodegenerative Disease, Fujian Medical University, Fuzhou 350122, China
- Experimental Teaching Center of Basic Medicine, Fujian Medical University, Fuzhou 350122, China
| | - Chunying Zhang
- Department of Biochemistry and Molecular Biology, Fujian Medical University, Fuzhou 350122, China; (L.H.); (R.L.); (C.Z.); (G.Z.); (Y.Q.)
| | - Shaoqing Zheng
- School of Clinical Medicine, Fujian Medical University, Fuzhou 350122, China; (S.Z.); (Y.W.); (Z.W.); (S.C.); (Y.S.)
| | - Yiyang Wang
- School of Clinical Medicine, Fujian Medical University, Fuzhou 350122, China; (S.Z.); (Y.W.); (Z.W.); (S.C.); (Y.S.)
| | - Zeyu Wu
- School of Clinical Medicine, Fujian Medical University, Fuzhou 350122, China; (S.Z.); (Y.W.); (Z.W.); (S.C.); (Y.S.)
| | - Sihao Chen
- School of Clinical Medicine, Fujian Medical University, Fuzhou 350122, China; (S.Z.); (Y.W.); (Z.W.); (S.C.); (Y.S.)
| | - Yihan Shen
- School of Clinical Medicine, Fujian Medical University, Fuzhou 350122, China; (S.Z.); (Y.W.); (Z.W.); (S.C.); (Y.S.)
| | - Guoheng Zhang
- Department of Biochemistry and Molecular Biology, Fujian Medical University, Fuzhou 350122, China; (L.H.); (R.L.); (C.Z.); (G.Z.); (Y.Q.)
| | - Yuanlin Qi
- Department of Biochemistry and Molecular Biology, Fujian Medical University, Fuzhou 350122, China; (L.H.); (R.L.); (C.Z.); (G.Z.); (Y.Q.)
| | - Ling Lin
- Department of Biochemistry and Molecular Biology, Fujian Medical University, Fuzhou 350122, China; (L.H.); (R.L.); (C.Z.); (G.Z.); (Y.Q.)
- Key Laboratory of Brain Aging and Neurodegenerative Disease, Fujian Medical University, Fuzhou 350122, China
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Cibulka M, Brodnanova M, Halasova E, Kurca E, Kolisek M, Grofik M. The Role of Magnesium in Parkinson's Disease: Status Quo and Implications for Future Research. Int J Mol Sci 2024; 25:8425. [PMID: 39125993 PMCID: PMC11312984 DOI: 10.3390/ijms25158425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2024] [Revised: 07/15/2024] [Accepted: 07/29/2024] [Indexed: 08/12/2024] Open
Abstract
Neurodegenerative diseases represent an increasing economic, social, and, above all, medical burden worldwide. The second most prevalent disease in this category is Parkinson's disease, surpassed only by Alzheimer's. It is a treatable but still incurable systemic disease with a pathogenesis that has not yet been elucidated. Several theories are currently being developed to explain the causes and progression of Parkinson's disease. Magnesium is one of the essential macronutrients and is absolutely necessary for life as we know it. The magnesium cation performs several important functions in the cell in the context of energetic metabolism, substrate metabolism, cell signalling, and the regulation of the homeostasis of other ions. Several of these cellular processes have been simultaneously described as being disrupted in the development and progression of Parkinson's disease. The relationship between magnesium homeostasis and the pathogenesis of Parkinson's disease has received little scientific attention to date. The aim of this review is to summarise and critically evaluate the current state of knowledge on the possible role of magnesium in the pathogenesis of Parkinson's disease and to outline possible future directions for research in this area.
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Affiliation(s)
- Michal Cibulka
- Biomedical Centre Martin, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, 036 01 Martin, Slovakia; (M.C.); (M.B.); (E.H.)
| | - Maria Brodnanova
- Biomedical Centre Martin, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, 036 01 Martin, Slovakia; (M.C.); (M.B.); (E.H.)
| | - Erika Halasova
- Biomedical Centre Martin, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, 036 01 Martin, Slovakia; (M.C.); (M.B.); (E.H.)
| | - Egon Kurca
- Clinic of Neurology, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, 036 01 Martin, Slovakia;
| | - Martin Kolisek
- Biomedical Centre Martin, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, 036 01 Martin, Slovakia; (M.C.); (M.B.); (E.H.)
| | - Milan Grofik
- Clinic of Neurology, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, 036 01 Martin, Slovakia;
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Brahma R, Raghuraman H. Characterization of a novel MgtE homolog and its structural dynamics in membrane mimetics. Biophys J 2024; 123:1968-1983. [PMID: 38042987 PMCID: PMC11309985 DOI: 10.1016/j.bpj.2023.11.3402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Revised: 11/03/2023] [Accepted: 11/30/2023] [Indexed: 12/04/2023] Open
Abstract
Magnesium (Mg2+) is the most abundant divalent cation in the cell and is critical for numerous cellular processes. Despite its importance, the mechanisms of intracellular Mg2+ transport and its regulation are poorly understood. MgtE is the main Mg2+ transport system in almost half of bacterial species and is an ortholog of mammalian SLC41A1 transporters, which are implicated in neurodegenerative diseases and cancer. To date, only MgtE from Thermus thermophilus (MgtETT) has been extensively characterized, mostly in detergent micelles, and gating-related structural dynamics in biologically relevant membranes are scarce. The MgtE homolog from Bacillus firmus (MgtEBF) is unique since it lacks the entire Mg2+-sensing N-domain but has conserved structural motifs in the TM-domain for Mg2+ transport. In this work, we have successfully purified this novel homolog in a stable and functional form, and ColabFold structure prediction analysis suggests a homodimer. Further, microscale thermophoresis experiments show that MgtEBF binds Mg2+ and ATP, similar to MgtETT. Importantly, we show that, despite lacking the N-domain, MgtEBF mediates Mg2+ transport function in the presence of an inwardly directed Mg2+ gradient in reconstituted proteoliposomes. Furthermore, comparison of the organization and dynamics of Trp residues in the TM-domain of MgtEBF in membrane mimetics, in apo- and Mg2+-bound forms, suggests that the cytoplasmic binding of Mg2+ might involve modest gating-related conformational changes at the TM-domain. Overall, our results show that the gating-related structural dynamics (hydration dynamics, conformational heterogeneity) of the full-length MgtEBF is significantly changed in functionally pertinent membrane environment, emphasizing the importance of lipid-protein interactions in MgtE gating mechanisms.
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Affiliation(s)
- Rupasree Brahma
- Crystallography and Molecular Biology Division, Saha Institute of Nuclear Physics, Kolkata, India; Homi Bhabha National Institute, Training School Complex, Mumbai, India
| | - H Raghuraman
- Crystallography and Molecular Biology Division, Saha Institute of Nuclear Physics, Kolkata, India; Homi Bhabha National Institute, Training School Complex, Mumbai, India.
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Uthayabalan S, Vishnu N, Madesh M, Stathopulos PB. The human MRS2 magnesium-binding domain is a regulatory feedback switch for channel activity. Life Sci Alliance 2023; 6:e202201742. [PMID: 36754568 PMCID: PMC9909464 DOI: 10.26508/lsa.202201742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 01/25/2023] [Accepted: 01/26/2023] [Indexed: 02/10/2023] Open
Abstract
Mitochondrial RNA splicing 2 (MRS2) forms a magnesium (Mg2+) entry protein channel in mitochondria. Whereas MRS2 contains two transmembrane domains constituting a pore on the inner mitochondrial membrane, most of the protein resides within the matrix. Yet, the precise structural and functional role of this obtrusive amino terminal domain (NTD) in human MRS2 is unknown. Here, we show that the MRS2 NTD self-associates into a homodimer, contrasting the pentameric assembly of CorA, an orthologous bacterial channel. Mg2+ and calcium suppress lower and higher order oligomerization of MRS2 NTD, whereas cobalt has no effect on the NTD but disassembles full-length MRS2. Mutating-pinpointed residues-mediating Mg2+ binding to the NTD not only selectively decreases Mg2+-binding affinity ∼sevenfold but also abrogates Mg2+ binding-induced secondary, tertiary, and quaternary structure changes. Disruption of NTD Mg2+ binding strikingly potentiates mitochondrial Mg2+ uptake in WT and Mrs2 knockout cells. Our work exposes a mechanism for human MRS2 autoregulation by negative feedback from the NTD and identifies a novel gain of function mutant with broad applicability to future Mg2+ signaling research.
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Affiliation(s)
- Sukanthathulse Uthayabalan
- Department of Physiology and Pharmacology, Schulich School of Medicine and Dentistry, University of Western Ontario, London, Canada
| | - Neelanjan Vishnu
- Center for Mitochondrial Medicine, Department of Medicine, University of Texas Health San Antonio, San Antonio, TX, USA
| | - Muniswamy Madesh
- Center for Mitochondrial Medicine, Department of Medicine, University of Texas Health San Antonio, San Antonio, TX, USA
| | - Peter B Stathopulos
- Department of Physiology and Pharmacology, Schulich School of Medicine and Dentistry, University of Western Ontario, London, Canada
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5
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Functional characteristics and therapeutic potential of SLC41 transporters. J Pharmacol Sci 2023; 151:88-92. [PMID: 36707183 DOI: 10.1016/j.jphs.2022.12.003] [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: 11/17/2022] [Revised: 11/28/2022] [Accepted: 12/09/2022] [Indexed: 12/15/2022] Open
Abstract
Magnesium (Mg2+) plays an important role in various cellular functions such as protein synthesis, DNA stability, energy metabolism, enzyme and channel activities, and muscle contractility. Therefore, intracellular Mg2+ concentration is tightly regulated by multiple Mg2+ transporters and channels. So far, various candidate genes of Mg2+ transporters have been identified, and the research on their structure and function is currently in progress. The Solute Carrier 41 (SLC41) family, which is related to the bacterial Mg2+ transporter/channel MgtE, comprises three isoforms of SLC41A1, SLC41A2, and SLC41A3. Based on recent studies, SLC41A1 is thought to mediate Mg2+ influx or Na+-dependent Mg2+ efflux across the plasma membrane, whereas SLC41A2 and SLC41A3 may mediate Mg2+ fluxes across either the plasma membrane or organellar membranes. Intriguingly, SLC41A1 variants have been identified in patients with Parkinson's disease (PD) and nephronophthisis-related ciliopathies. Further genetic analyses reveal the association of SLC41A1 polymorphisms with PD risks. This review highlights the recent advances in the understanding of the molecular and functional characteristics of SLC41 family towards its therapeutic and diagnostic applications.
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Magnesium and the Brain: A Focus on Neuroinflammation and Neurodegeneration. Int J Mol Sci 2022; 24:ijms24010223. [PMID: 36613667 PMCID: PMC9820677 DOI: 10.3390/ijms24010223] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 12/19/2022] [Accepted: 12/20/2022] [Indexed: 12/25/2022] Open
Abstract
Magnesium (Mg) is involved in the regulation of metabolism and in the maintenance of the homeostasis of all the tissues, including the brain, where it harmonizes nerve signal transmission and preserves the integrity of the blood-brain barrier. Mg deficiency contributes to systemic low-grade inflammation, the common denominator of most diseases. In particular, neuroinflammation is the hallmark of neurodegenerative disorders. Starting from a rapid overview on the role of magnesium in the brain, this narrative review provides evidences linking the derangement of magnesium balance with multiple sclerosis, Alzheimer's, and Parkinson's diseases.
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Ilenwabor BP, Franken GAC, Sponder G, Bos C, Racay P, Kolisek M, Hoenderop JGJ, de Baaij JHF. SLC41A1 knockout mice display normal magnesium homeostasis. Am J Physiol Renal Physiol 2022; 323:F553-F563. [PMID: 36049064 DOI: 10.1152/ajprenal.00101.2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Transcellular Mg2+ reabsorption in the distal convoluted tubule (DCT) of the kidneys plays an important role in maintaining systemic Mg2+ homeostasis. SLC41A1 is a Na+/Mg2+ exchanger that mediates Mg2+ efflux from cells and is hypothesized to facilitate basolateral extrusion of Mg2+ in the DCT. In this study, we generated a SLC41A1 knockout mouse model to examine the role of SLC41A1 in Mg2+ homeostasis. Slc41a1-/- mice exhibited similar serum and urine Mg2+ levels as their wild-type littermates. Dietary restriction of Mg2+ resulted in reduced serum Mg2+ concentration and urinary Mg2+ excretion, which was similar in the wild-type and knockout groups. Expression of genes encoding Mg2+ channels and transporters such as transient receptor potential melastatin 6 (Trpm6), transient receptor potential melastatin 7 (Trpm7), cyclin and CBS domain divalent metal cation transport mediator 2 (Cnnm2), and Slc41a3 were unchanged based on genotype. We investigated the potential redundancy of SLC41A1 and its homolog SLC41A3 by generating a double knockout mouse. Although Slc41a3-/- knockout mice showed significantly reduced serum Mg2+ compared with wild-type and Slc41a1-/- knockout groups, double knockout mice displayed similar serum Mg2+ levels as Slc41a3-/- knockout mice. In conclusion, our data show that SLC41A1 is not involved in the regulation of systemic Mg2+ homeostasis in mice. Our data also demonstrate that SLC41A1 does not compensate for the loss of SLC41A3, suggesting different functions of these SLC41 proteins in vivo.NEW & NOTEWORTHY SLC41A1 has been hypothesized to mediate Mg2+ extrusion in the distal convoluted tubule and thus regulate Mg2+ homeostasis. This study investigated the role of SLC41A1 in Mg2+ homeostasis in vivo using a transgenic mouse model. Our results demonstrate that SLC41A1 is not required to maintain normal Mg2+ balance in mice. We also show that SLC41A3 is more important than SLC41A1 in regulating systemic Mg2+ levels.
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Affiliation(s)
- Barnabas P Ilenwabor
- Department of Physiology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Gijs A C Franken
- Department of Physiology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Gerhard Sponder
- Institute of Veterinary Physiology, Freie Universität Berlin, Berlin, Germany
| | - Caro Bos
- Department of Physiology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Peter Racay
- Department of Medical Biochemistry, Jessenius Faculty of Medicine, Comenius University in Bratislava, Martin, Slovakia.,Biomedical Center Martin, Jessenius Faculty of Medicine, Comenius University in Bratislava, Martin, Slovakia
| | - Martin Kolisek
- Biomedical Center Martin, Jessenius Faculty of Medicine, Comenius University in Bratislava, Martin, Slovakia
| | - Joost G J Hoenderop
- Department of Physiology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Jeroen H F de Baaij
- Department of Physiology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
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Jin F, Huang Y, Hattori M. Recent Advances in the Structural Biology of Mg 2+ Channels and Transporters. J Mol Biol 2022; 434:167729. [PMID: 35841930 DOI: 10.1016/j.jmb.2022.167729] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Revised: 07/06/2022] [Accepted: 07/07/2022] [Indexed: 10/17/2022]
Abstract
Magnesium ions (Mg2+) are the most abundant divalent cations in living organisms and are essential for various physiological processes, including ATP utilization and the catalytic activity of numerous enzymes. Therefore, the homeostatic mechanisms associated with cellular Mg2+ are crucial for both eukaryotic and prokaryotic organisms and are thus strictly controlled by Mg2+ channels and transporters. Technological advances in structural biology, such as the expression screening of membrane proteins, in meso phase crystallization, and recent cryo-EM techniques, have enabled the structure determination of numerous Mg2+ channels and transporters. In this review article, we provide an overview of the families of Mg2+ channels and transporters (MgtE/SLC41, TRPM6/7, CorA/Mrs2, CorC/CNNM), and discuss the structural biology prospects based on the known structures of MgtE, TRPM7, CorA and CorC.
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Affiliation(s)
- Fei Jin
- State Key Laboratory of Genetic Engineering, Shanghai Key Laboratory of Bioactive Small Molecules, Collaborative Innovation Center of Genetics and Development, Department of Physiology and Neurobiology, School of Life Sciences, Fudan University, Shanghai 200438, China
| | - Yichen Huang
- State Key Laboratory of Genetic Engineering, Shanghai Key Laboratory of Bioactive Small Molecules, Collaborative Innovation Center of Genetics and Development, Department of Physiology and Neurobiology, School of Life Sciences, Fudan University, Shanghai 200438, China
| | - Motoyuki Hattori
- State Key Laboratory of Genetic Engineering, Shanghai Key Laboratory of Bioactive Small Molecules, Collaborative Innovation Center of Genetics and Development, Department of Physiology and Neurobiology, School of Life Sciences, Fudan University, Shanghai 200438, China.
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9
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Cibulka M, Brodnanova M, Grendar M, Necpal J, Benetin J, Han V, Kurca E, Nosal V, Skorvanek M, Vesely B, Stanclova A, Lasabova Z, Pös Z, Szemes T, Stuchlik S, Grofik M, Kolisek M. Alzheimer's Disease-Associated SNP rs708727 in SLC41A1 May Increase Risk for Parkinson's Disease: Report from Enlarged Slovak Study. Int J Mol Sci 2022; 23:ijms23031604. [PMID: 35163527 PMCID: PMC8835868 DOI: 10.3390/ijms23031604] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2022] [Revised: 01/21/2022] [Accepted: 01/25/2022] [Indexed: 02/04/2023] Open
Abstract
SLC41A1 (A1) SNPs rs11240569 and rs823156 are associated with altered risk for Parkinson's disease (PD), predominantly in Asian populations, and rs708727 has been linked to Alzheimer's disease (AD). In this study, we have examined a potential association of the three aforementioned SNPs and of rs9438393, rs56152218, and rs61822602 (all three lying in the A1 promoter region) with PD in the Slovak population. Out of the six tested SNPs, we have identified only rs708727 as being associated with an increased risk for PD onset in Slovaks. The minor allele (A) in rs708727 is associated with PD in dominant and completely over-dominant genetic models (ORD = 1.36 (1.05-1.77), p = 0.02, and ORCOD = 1.34 (1.04-1.72), p = 0.02). Furthermore, the genotypic triplet GG(rs708727) + AG(rs823156) + CC(rs61822602) might be clinically relevant despite showing a medium (h ≥ 0.5) size difference (h = 0.522) between the PD and the control populations. RandomForest modeling has identified the power of the tested SNPs for discriminating between PD-patients and the controls to be essentially zero. The identified association of rs708727 with PD in the Slovak population leads us to hypothesize that this A1 polymorphism, which is involved in the epigenetic regulation of the expression of the AD-linked gene PM20D1, is also involved in the pathoetiology of PD (or universally in neurodegeneration) through the same or similar mechanism as in AD.
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Affiliation(s)
- Michal Cibulka
- Biomedical Centre Martin, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, 03601 Martin, Slovakia; (M.C.); (M.B.); (M.G.)
| | - Maria Brodnanova
- Biomedical Centre Martin, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, 03601 Martin, Slovakia; (M.C.); (M.B.); (M.G.)
| | - Marian Grendar
- Biomedical Centre Martin, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, 03601 Martin, Slovakia; (M.C.); (M.B.); (M.G.)
| | - Jan Necpal
- Clinic of Neurology, AGEL Hospital in Zvolen, 96001 Zvolen, Slovakia;
| | - Jan Benetin
- Clinic of Neurology, University Hospital Bratislava, Slovak Medical University in Bratislava, 83303 Bratislva, Slovakia;
| | - Vladimir Han
- Clinic of Neurology, University Hospital of L. Pasteur in Kosice, University of Pavol Jozef Safarik, 04066 Kosice, Slovakia; (V.H.); (M.S.)
| | - Egon Kurca
- Clinic of Neurology, University Hospital Martin, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, 03601 Martin, Slovakia; (E.K.); (V.N.)
| | - Vladimir Nosal
- Clinic of Neurology, University Hospital Martin, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, 03601 Martin, Slovakia; (E.K.); (V.N.)
| | - Matej Skorvanek
- Clinic of Neurology, University Hospital of L. Pasteur in Kosice, University of Pavol Jozef Safarik, 04066 Kosice, Slovakia; (V.H.); (M.S.)
| | - Branislav Vesely
- Clinic of Neurology, Faculty Hospital in Nitra, Constantine the Philosopher University in Nitra, 94901 Nitra, Slovakia;
| | - Andrea Stanclova
- Institute of Molecular Biology and Genomics, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, 03601 Martin, Slovakia; (A.S.); (Z.L.)
| | - Zora Lasabova
- Institute of Molecular Biology and Genomics, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, 03601 Martin, Slovakia; (A.S.); (Z.L.)
| | - Zuzana Pös
- Department of Molecular Biology, Faculty of Natural Sciences, Comenius University in Bratislava, 84104 Bratislava, Slovakia; (Z.P.); (T.S.); (S.S.)
- GENETON s.r.o., 84104 Bratislava, Slovakia
| | - Tomas Szemes
- Department of Molecular Biology, Faculty of Natural Sciences, Comenius University in Bratislava, 84104 Bratislava, Slovakia; (Z.P.); (T.S.); (S.S.)
- GENETON s.r.o., 84104 Bratislava, Slovakia
| | - Stanislav Stuchlik
- Department of Molecular Biology, Faculty of Natural Sciences, Comenius University in Bratislava, 84104 Bratislava, Slovakia; (Z.P.); (T.S.); (S.S.)
| | - Milan Grofik
- Clinic of Neurology, University Hospital Martin, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, 03601 Martin, Slovakia; (E.K.); (V.N.)
- Correspondence: (M.G.); (M.K.)
| | - Martin Kolisek
- Biomedical Centre Martin, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, 03601 Martin, Slovakia; (M.C.); (M.B.); (M.G.)
- Correspondence: (M.G.); (M.K.)
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Hiruta Y, Shindo Y, Oka K, Citterio D. Small Molecule-based Alkaline-earth Metal Ion Fluorescent Probes for Imaging Intracellular and Intercellular Multiple Signals. CHEM LETT 2021. [DOI: 10.1246/cl.200917] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yuki Hiruta
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
| | - Yutaka Shindo
- Department of Biosciences and Informatics, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
| | - Kotaro Oka
- Department of Biosciences and Informatics, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
| | - Daniel Citterio
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
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Goldstein O, Gana-Weisz M, Casey F, Meltzer-Fridrich H, Yaacov O, Waldman YY, Lin D, Mordechai Y, Zhu J, Cullen PF, Omer N, Shiner T, Thaler A, Bar-Shira A, Mirelman A, John S, Giladi N, Orr-Urtreger A. PARK16 locus: Differential effects of the non-coding rs823114 on Parkinson’s disease risk, RNA expression, and DNA methylation. J Genet Genomics 2021; 48:341-345. [DOI: 10.1016/j.jgg.2020.10.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Revised: 09/29/2020] [Accepted: 10/13/2020] [Indexed: 02/06/2023]
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12
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Jin F, Sun M, Fujii T, Yamada Y, Wang J, Maturana AD, Wada M, Su S, Ma J, Takeda H, Kusakizako T, Tomita A, Nakada-Nakura Y, Liu K, Uemura T, Nomura Y, Nomura N, Ito K, Nureki O, Namba K, Iwata S, Yu Y, Hattori M. The structure of MgtE in the absence of magnesium provides new insights into channel gating. PLoS Biol 2021; 19:e3001231. [PMID: 33905418 PMCID: PMC8104411 DOI: 10.1371/journal.pbio.3001231] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 05/07/2021] [Accepted: 04/12/2021] [Indexed: 12/15/2022] Open
Abstract
MgtE is a Mg2+ channel conserved in organisms ranging from prokaryotes to eukaryotes, including humans, and plays an important role in Mg2+ homeostasis. The previously determined MgtE structures in the Mg2+-bound, closed-state, and structure-based functional analyses of MgtE revealed that the binding of Mg2+ ions to the MgtE cytoplasmic domain induces channel inactivation to maintain Mg2+ homeostasis. There are no structures of the transmembrane (TM) domain for MgtE in Mg2+-free conditions, and the pore-opening mechanism has thus remained unclear. Here, we determined the cryo-electron microscopy (cryo-EM) structure of the MgtE-Fab complex in the absence of Mg2+ ions. The Mg2+-free MgtE TM domain structure and its comparison with the Mg2+-bound, closed-state structure, together with functional analyses, showed the Mg2+-dependent pore opening of MgtE on the cytoplasmic side and revealed the kink motions of the TM2 and TM5 helices at the glycine residues, which are important for channel activity. Overall, our work provides structure-based mechanistic insights into the channel gating of MgtE.
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Affiliation(s)
- Fei Jin
- State Key Laboratory of Genetic Engineering, Collaborative Innovation Center of Genetics and Development, Shanghai Key Laboratory of Bioactive Small Molecules, Department of Physiology and Biophysics, School of Life Sciences, Fudan University, Shanghai, China
| | - Minxuan Sun
- State Key Laboratory of Genetic Engineering, Collaborative Innovation Center of Genetics and Development, Shanghai Key Laboratory of Bioactive Small Molecules, Department of Physiology and Biophysics, School of Life Sciences, Fudan University, Shanghai, China
| | - Takashi Fujii
- Graduate School of Frontier Biosciences, Osaka University, Osaka, Japan
- Riken Quantitative Biology Center, Osaka, Japan
| | - Yurika Yamada
- Graduate School of Frontier Biosciences, Osaka University, Osaka, Japan
| | - Jin Wang
- School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Andrés D. Maturana
- Department of Bioengineering Sciences, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
| | - Miki Wada
- Department of Computational Biology and Medical Sciences, Graduate School of Frontier Sciences, The University of Tokyo, Chiba, Japan
| | - Shichen Su
- State Key Laboratory of Genetic Engineering, Collaborative Innovation Center of Genetics and Development, Multiscale Research Institute for Complex Systems, Department of Biochemistry, School of Life Sciences, Fudan University, Shanghai, China
| | - Jinbiao Ma
- State Key Laboratory of Genetic Engineering, Collaborative Innovation Center of Genetics and Development, Multiscale Research Institute for Complex Systems, Department of Biochemistry, School of Life Sciences, Fudan University, Shanghai, China
| | - Hironori Takeda
- Faculty of Life Sciences, Kyoto Sangyo University, Kyoto, Japan
| | - Tsukasa Kusakizako
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Tokyo, Japan
| | - Atsuhiro Tomita
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Tokyo, Japan
| | - Yoshiko Nakada-Nakura
- Department of Cell Biology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Kehong Liu
- Department of Cell Biology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Tomoko Uemura
- Department of Cell Biology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Yayoi Nomura
- Department of Cell Biology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Norimichi Nomura
- Department of Cell Biology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Koichi Ito
- Department of Computational Biology and Medical Sciences, Graduate School of Frontier Sciences, The University of Tokyo, Chiba, Japan
| | - Osamu Nureki
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Tokyo, Japan
| | - Keiichi Namba
- Graduate School of Frontier Biosciences, Osaka University, Osaka, Japan
- Riken Quantitative Biology Center, Osaka, Japan
| | - So Iwata
- Department of Cell Biology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
- RIKEN SPring-8 Center, Kouto, Hyogo, Japan
| | - Ye Yu
- School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Motoyuki Hattori
- State Key Laboratory of Genetic Engineering, Collaborative Innovation Center of Genetics and Development, Shanghai Key Laboratory of Bioactive Small Molecules, Department of Physiology and Biophysics, School of Life Sciences, Fudan University, Shanghai, China
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13
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Shen L, Wang C, Chen L, Wong G. Dysregulation of MicroRNAs and PIWI-Interacting RNAs in a Caenorhabditis elegans Parkinson's Disease Model Overexpressing Human α-Synuclein and Influence of tdp-1. Front Neurosci 2021; 15:600462. [PMID: 33762903 PMCID: PMC7982545 DOI: 10.3389/fnins.2021.600462] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Accepted: 01/27/2021] [Indexed: 12/13/2022] Open
Abstract
MicroRNAs (miRNAs) and PIWI-interacting RNAs (piRNAs) regulate gene expression and biological processes through specific genetic and epigenetic mechanisms. Recent studies have described a dysregulation of small non-coding RNAs in Parkinson’s disease (PD) tissues but have been limited in scope. Here, we extend these studies by comparing the dysregulation of both miRNAs and piRNAs from transgenic Caenorhabditis elegans (C. elegans) nematodes overexpressing pan-neuronally human α-synuclein wild-type (WT) (HASNWT OX) or mutant (HASNA53T OX). We observed 32 miRNAs and 112 piRNAs dysregulated in HASNA53T OX compared with WT. Genetic crosses of HASNA53T OX PD animal models with tdp-1 null mutants, the C. elegans ortholog of TDP-43, an RNA-binding protein aggregated in frontal temporal lobar degeneration, improved their behavioral deficits and changed the number of dysregulated miRNAs to 11 and piRNAs to none. Neuronal function-related genes T28F4.5, C34F6.1, C05C10.3, camt-1, and F54D10.3 were predicted to be targeted by cel-miR-1018, cel-miR-355-5p (C34F6.1 and C05C10.3), cel-miR-800-3p, and 21ur-1581 accordingly. This study provides a molecular landscape of small non-coding RNA dysregulation in an animal model that provides insight into the epigenetic changes, molecular processes, and interactions that occur during PD-associated neurodegenerative disorders.
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Affiliation(s)
- Linjing Shen
- Centre for Reproduction, Development and Aging, Faculty of Health Sciences, University of Macau, Macau, China
| | - Changliang Wang
- Centre for Reproduction, Development and Aging, Faculty of Health Sciences, University of Macau, Macau, China.,Bioland Laboratory (Guangzhou Regenerative Medicine and Health Guangdong Laboratory), Guangzhou, China
| | - Liang Chen
- Department of Computer Science, College of Engineering, Shantou University, Shantou, China.,Key Laboratory of Intelligent Manufacturing Technology of Ministry of Education, Shantou University, Shantou, China
| | - Garry Wong
- Centre for Reproduction, Development and Aging, Faculty of Health Sciences, University of Macau, Macau, China
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14
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Li M, Hu K, Lin D, Wang Z, Xu M, Huang J, Chen Z, Zhang Y, Yin L, You R, Li CH, Guan YQ. Synthesis of Double Interfering Biodegradable Nano-MgO Micelle Composites and Their Effect on Parkinson's Disease. ACS Biomater Sci Eng 2021; 7:1216-1229. [PMID: 33560819 DOI: 10.1021/acsbiomaterials.0c01474] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Although gene therapy targeting the α-synuclein gene (SNCA) has achieved outstanding results in the treatment of Parkinson's disease (PD), the lack of a suitable gene delivery system and inadequate therapeutic effects remains a tremendous obstacle for RNAi therapy. Here, a degradable nano-MgO micelle composite (MgO(pDNA)-INS-Plu-mRNA-NGF) with double interference (mediated by RNAi and α-synuclein (α-syn)-targeted mRNA) was constructed. Binding mRNA treatment significantly increased the inhibitory effect compared to the reduction of α-syn expression by RNAi alone. Moreover, the cell experiments demonstrated that the viability of the PD cell model can be significantly improved by nano-MgO micelle composite treatment. More importantly, the composite has the ability to penetrate the blood brain barrier and deliver genes and mRNA to neurons through endocytosis mediated by the nerve growth factor and its receptors, thus significantly downregulating the expression of α-syn in the PD mice model without causing damage to other major organs. Overall, this work provides a novel insight into the design of biomaterials for gene therapy for PD.
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Affiliation(s)
- Mingchao Li
- School of Life Science, South China Normal University, Guangzhou 510631, China
| | - Kaikai Hu
- Guangzhou Key Laboratory of Spectral Analysis and Functional Probes, College of Biophotonics, South China Normal University, Guangzhou 510631, China
| | - Danmin Lin
- School of Life Science, South China Normal University, Guangzhou 510631, China
| | - Zhen Wang
- School of Life Science, South China Normal University, Guangzhou 510631, China
| | - Mingze Xu
- School of Life Science, South China Normal University, Guangzhou 510631, China
| | - Jinpeng Huang
- School of Life Science, South China Normal University, Guangzhou 510631, China.,South China Normal University-Panyu Central Hospital Joint Laboratory of Translational Medical Research, Panyu Central Hospital, Guangzhou 511400, China
| | - Zhan Chen
- School of Life Science, South China Normal University, Guangzhou 510631, China
| | - Yi Zhang
- School of Life Science, South China Normal University, Guangzhou 510631, China
| | - Liang Yin
- School of Life Science, South China Normal University, Guangzhou 510631, China
| | - Rong You
- School of Life Science, South China Normal University, Guangzhou 510631, China
| | - Chu-Hua Li
- School of Life Science, South China Normal University, Guangzhou 510631, China
| | - Yan-Qing Guan
- School of Life Science, South China Normal University, Guangzhou 510631, China.,South China Normal University-Panyu Central Hospital Joint Laboratory of Translational Medical Research, Panyu Central Hospital, Guangzhou 511400, China.,Guangzhou Key Laboratory of Spectral Analysis and Functional Probes, College of Biophotonics, South China Normal University, Guangzhou 510631, China
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15
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Tatarkova Z, de Baaij JHF, Grendar M, Aschenbach JR, Racay P, Bos C, Sponder G, Hoenderop JGJ, Röntgen M, Turcanova Koprusakova M, Kolisek M. Dietary Mg 2+ Intake and the Na +/Mg 2+ Exchanger SLC41A1 Influence Components of Mitochondrial Energetics in Murine Cardiomyocytes. Int J Mol Sci 2020; 21:E8221. [PMID: 33153064 PMCID: PMC7663288 DOI: 10.3390/ijms21218221] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2020] [Accepted: 10/27/2020] [Indexed: 01/02/2023] Open
Abstract
Cardiomyocytes are among the most energy-intensive cell types. Interplay between the components of cellular magnesium (Mg) homeostasis and energy metabolism in cardiomyocytes is poorly understood. We have investigated the effects of dietary Mg content and presence/functionality of the Na+/Mg2+ exchanger SLC41A1 on enzymatic functions of selected constituents of the Krebs cycle and complexes of the electron transport chain (ETC). The activities of aconitate hydratase (ACON), isocitrate dehydrogenase (ICDH), α-ketoglutarate dehydrogenase (KGDH), and ETC complexes CI-CV have been determined in vitro in mitochondria isolated from hearts of wild-type (WT) and Slc41a1-/- mice fed a diet with either normal or low Mg content. Our data demonstrate that both, the type of Mg diet and the Slc41a1 genotype largely impact on the activities of enzymes of the Krebs cycle and ETC. Moreover, a compensatory effect of Slc41a1-/- genotype on the effect of low Mg diet on activities of the tested Krebs cycle enzymes has been identified. A machine-learning analysis identified activities of ICDH, CI, CIV, and CV as common predictors of the type of Mg diet and of CII as suitable predictor of Slc41a1 genotype. Thus, our data delineate the effect of dietary Mg content and of SLC41A1 functionality on the energy-production in cardiac mitochondria.
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Affiliation(s)
- Zuzana Tatarkova
- Department of Medical Biochemistry, Jessenius Faculty of Medicine, Comenius University in Bratislava, Mala Hora 4D, 036 01 Martin, Slovakia; (Z.T.); (P.R.)
| | - Jeroen H. F. de Baaij
- Department of Physiology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, 6500HB Nijmegen, The Netherlands; (J.H.F.d.B.); (C.B.); (J.G.J.H.)
| | - Marian Grendar
- Biomedical Center Martin, Jessenius Faculty of Medicine, Comenius University in Bratislava, Mala Hora 4D, 036 01 Martin, Slovakia;
| | - Jörg R. Aschenbach
- Institute of Veterinary Physiology, Freie Universität Berlin, Oertzenweg 19b, 14163 Berlin, Germany; (J.R.A.); (G.S.)
| | - Peter Racay
- Department of Medical Biochemistry, Jessenius Faculty of Medicine, Comenius University in Bratislava, Mala Hora 4D, 036 01 Martin, Slovakia; (Z.T.); (P.R.)
- Biomedical Center Martin, Jessenius Faculty of Medicine, Comenius University in Bratislava, Mala Hora 4D, 036 01 Martin, Slovakia;
| | - Caro Bos
- Department of Physiology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, 6500HB Nijmegen, The Netherlands; (J.H.F.d.B.); (C.B.); (J.G.J.H.)
| | - Gerhard Sponder
- Institute of Veterinary Physiology, Freie Universität Berlin, Oertzenweg 19b, 14163 Berlin, Germany; (J.R.A.); (G.S.)
| | - Joost G. J. Hoenderop
- Department of Physiology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, 6500HB Nijmegen, The Netherlands; (J.H.F.d.B.); (C.B.); (J.G.J.H.)
| | - Monika Röntgen
- Leibniz Institute for Farm Animal Biology, Wilhelm-Stahl-Allee 2, 18196 Dummerstorf, Germany;
| | | | - Martin Kolisek
- Biomedical Center Martin, Jessenius Faculty of Medicine, Comenius University in Bratislava, Mala Hora 4D, 036 01 Martin, Slovakia;
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16
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Chatterjee S, Brahma R, Raghuraman H. Gating-related Structural Dynamics of the MgtE Magnesium Channel in Membrane-Mimetics Utilizing Site-Directed Tryptophan Fluorescence. J Mol Biol 2020; 433:166691. [PMID: 33203509 DOI: 10.1016/j.jmb.2020.10.025] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Revised: 10/17/2020] [Accepted: 10/19/2020] [Indexed: 12/25/2022]
Abstract
Magnesium is the most abundant divalent cation present in the cell, and an abnormal Mg2+ homeostasis is associated with several diseases in humans. However, among ion channels, the mechanisms of intracellular regulation and transport of Mg2+ are poorly understood. MgtE is a homodimeric Mg2+-selective channel and is negatively regulated by high intracellular Mg2+ concentration where the cytoplasmic domain of MgtE acts as a Mg2+ sensor. Most of the previous biophysical studies on MgtE have been carried out in detergent micelles and the information regarding gating-related structural dynamics of MgtE in physiologically-relevant membrane environment is scarce. In this work, we monitored the changes in gating-related structural dynamics, hydration dynamics and conformational heterogeneity of MgtE in micelles and membranes using the intrinsic site-directed Trp fluorescence. For this purpose, we have engineered six single-Trp mutants in the functional Trp-less background of MgtE to obtain site-specific information on the gating-related structural dynamics of MgtE in membrane-mimetic systems. Our results indicate that Mg2+-induced gating might involve the possibility of a 'conformational wave' from the cytosolic N-domain to transmembrane domain of MgtE. Although MgtE is responsive to Mg2+-induced gating in both micelles and membranes, the organization and dynamics of MgtE is substantially altered in physiologically important phospholipid membranes compared to micelles. This is accompanied by significant changes in hydration dynamics and conformational heterogeneity. Overall, our results highlight the importance of lipid-protein interactions and are relevant for understanding gating mechanism of magnesium channels in general, and MgtE in particular.
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Affiliation(s)
- Satyaki Chatterjee
- Crystallography and Molecular Biology Division, Saha Institute of Nuclear Physics, Homi Bhabha National Institute, 1/AF Bidhannagar, Kolkata, India
| | - Rupasree Brahma
- Crystallography and Molecular Biology Division, Saha Institute of Nuclear Physics, Homi Bhabha National Institute, 1/AF Bidhannagar, Kolkata, India
| | - H Raghuraman
- Crystallography and Molecular Biology Division, Saha Institute of Nuclear Physics, Homi Bhabha National Institute, 1/AF Bidhannagar, Kolkata, India.
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17
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Hinarejos I, Machuca C, Sancho P, Espinós C. Mitochondrial Dysfunction, Oxidative Stress and Neuroinflammation in Neurodegeneration with Brain Iron Accumulation (NBIA). Antioxidants (Basel) 2020; 9:antiox9101020. [PMID: 33092153 PMCID: PMC7589120 DOI: 10.3390/antiox9101020] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Revised: 10/16/2020] [Accepted: 10/17/2020] [Indexed: 12/13/2022] Open
Abstract
The syndromes of neurodegeneration with brain iron accumulation (NBIA) encompass a group of invalidating and progressive rare diseases that share the abnormal accumulation of iron in the basal ganglia. The onset of NBIA disorders ranges from infancy to adulthood. Main clinical signs are related to extrapyramidal features (dystonia, parkinsonism and choreoathetosis), and neuropsychiatric abnormalities. Ten NBIA forms are widely accepted to be caused by mutations in the genes PANK2, PLA2G6, WDR45, C19ORF12, FA2H, ATP13A2, COASY, FTL1, CP, and DCAF17. Nonetheless, many patients remain without a conclusive genetic diagnosis, which shows that there must be additional as yet undiscovered NBIA genes. In line with this, isolated cases of known monogenic disorders, and also, new genetic diseases, which present with abnormal brain iron phenotypes compatible with NBIA, have been described. Several pathways are involved in NBIA syndromes: iron and lipid metabolism, mitochondrial dynamics, and autophagy. However, many neurodegenerative conditions share features such as mitochondrial dysfunction and oxidative stress, given the bioenergetics requirements of neurons. This review aims to describe the existing link between the classical ten NBIA forms by examining their connection with mitochondrial impairment as well as oxidative stress and neuroinflammation.
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Affiliation(s)
- Isabel Hinarejos
- Unit of Genetics and Genomics of Neuromuscular and Neurodegenerative Disorders, Centro de Investigación Príncipe Felipe (CIPF), 46012 Valencia, Spain; (I.H.); (C.M.); (P.S.)
- Rare Diseases Joint Units, CIPF-IIS La Fe & INCLIVA, 46012 Valencia, Spain
| | - Candela Machuca
- Unit of Genetics and Genomics of Neuromuscular and Neurodegenerative Disorders, Centro de Investigación Príncipe Felipe (CIPF), 46012 Valencia, Spain; (I.H.); (C.M.); (P.S.)
- Rare Diseases Joint Units, CIPF-IIS La Fe & INCLIVA, 46012 Valencia, Spain
- Unit of Stem Cells Therapies in Neurodegenerative Diseases, Centro de Investigación Príncipe Felipe (CIPF), 46012 Valencia, Spain
| | - Paula Sancho
- Unit of Genetics and Genomics of Neuromuscular and Neurodegenerative Disorders, Centro de Investigación Príncipe Felipe (CIPF), 46012 Valencia, Spain; (I.H.); (C.M.); (P.S.)
- Rare Diseases Joint Units, CIPF-IIS La Fe & INCLIVA, 46012 Valencia, Spain
| | - Carmen Espinós
- Unit of Genetics and Genomics of Neuromuscular and Neurodegenerative Disorders, Centro de Investigación Príncipe Felipe (CIPF), 46012 Valencia, Spain; (I.H.); (C.M.); (P.S.)
- Rare Diseases Joint Units, CIPF-IIS La Fe & INCLIVA, 46012 Valencia, Spain
- Department of Genetics, University of Valencia, 46100 Valencia, Spain
- Correspondence: ; Tel.: +34-963-289-680
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18
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Daw CC, Ramachandran K, Enslow BT, Maity S, Bursic B, Novello MJ, Rubannelsonkumar CS, Mashal AH, Ravichandran J, Bakewell TM, Wang W, Li K, Madaris TR, Shannon CE, Norton L, Kandala S, Caplan J, Srikantan S, Stathopulos PB, Reeves WB, Madesh M. Lactate Elicits ER-Mitochondrial Mg 2+ Dynamics to Integrate Cellular Metabolism. Cell 2020; 183:474-489.e17. [PMID: 33035451 PMCID: PMC7572828 DOI: 10.1016/j.cell.2020.08.049] [Citation(s) in RCA: 86] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Revised: 06/15/2020] [Accepted: 08/25/2020] [Indexed: 02/06/2023]
Abstract
Mg2+ is the most abundant divalent cation in metazoans and an essential cofactor for ATP, nucleic acids, and countless metabolic enzymes. To understand how the spatio-temporal dynamics of intracellular Mg2+ (iMg2+) are integrated into cellular signaling, we implemented a comprehensive screen to discover regulators of iMg2+ dynamics. Lactate emerged as an activator of rapid release of Mg2+ from endoplasmic reticulum (ER) stores, which facilitates mitochondrial Mg2+ (mMg2+) uptake in multiple cell types. We demonstrate that this process is remarkably temperature sensitive and mediated through intracellular but not extracellular signals. The ER-mitochondrial Mg2+ dynamics is selectively stimulated by L-lactate. Further, we show that lactate-mediated mMg2+ entry is facilitated by Mrs2, and point mutations in the intermembrane space loop limits mMg2+ uptake. Intriguingly, suppression of mMg2+ surge alleviates inflammation-induced multi-organ failure. Together, these findings reveal that lactate mobilizes iMg2+ and links the mMg2+ transport machinery with major metabolic feedback circuits and mitochondrial bioenergetics.
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Affiliation(s)
- Cassidy C Daw
- Department of Medicine, Center for Precision Medicine, University of Texas Health San Antonio, San Antonio, TX 78229, USA; Department of Medicine/Cardiology/Diabetes/Nephrology Divisions, University of Texas Health San Antonio, San Antonio, TX 78229, USA
| | - Karthik Ramachandran
- Department of Medicine, Center for Precision Medicine, University of Texas Health San Antonio, San Antonio, TX 78229, USA; Department of Medicine/Cardiology/Diabetes/Nephrology Divisions, University of Texas Health San Antonio, San Antonio, TX 78229, USA
| | - Benjamin T Enslow
- Department of Medicine, Center for Precision Medicine, University of Texas Health San Antonio, San Antonio, TX 78229, USA; Department of Medicine/Cardiology/Diabetes/Nephrology Divisions, University of Texas Health San Antonio, San Antonio, TX 78229, USA
| | - Soumya Maity
- Department of Medicine, Center for Precision Medicine, University of Texas Health San Antonio, San Antonio, TX 78229, USA; Department of Medicine/Cardiology/Diabetes/Nephrology Divisions, University of Texas Health San Antonio, San Antonio, TX 78229, USA
| | - Brian Bursic
- Department of Physiology and Pharmacology, Western University, London, ON N6A 5C1, Canada
| | - Matthew J Novello
- Department of Physiology and Pharmacology, Western University, London, ON N6A 5C1, Canada
| | - Cherubina S Rubannelsonkumar
- Department of Medicine, Center for Precision Medicine, University of Texas Health San Antonio, San Antonio, TX 78229, USA; Department of Medicine/Cardiology/Diabetes/Nephrology Divisions, University of Texas Health San Antonio, San Antonio, TX 78229, USA
| | - Ayah H Mashal
- Department of Medicine, Center for Precision Medicine, University of Texas Health San Antonio, San Antonio, TX 78229, USA; Department of Medicine/Cardiology/Diabetes/Nephrology Divisions, University of Texas Health San Antonio, San Antonio, TX 78229, USA
| | - Joel Ravichandran
- Department of Medicine, Center for Precision Medicine, University of Texas Health San Antonio, San Antonio, TX 78229, USA; Department of Medicine/Cardiology/Diabetes/Nephrology Divisions, University of Texas Health San Antonio, San Antonio, TX 78229, USA
| | - Terry M Bakewell
- Department of Medicine/Cardiology/Diabetes/Nephrology Divisions, University of Texas Health San Antonio, San Antonio, TX 78229, USA
| | - Weiwei Wang
- Department of Medicine, Center for Precision Medicine, University of Texas Health San Antonio, San Antonio, TX 78229, USA; Department of Medicine/Cardiology/Diabetes/Nephrology Divisions, University of Texas Health San Antonio, San Antonio, TX 78229, USA
| | - Kang Li
- Department of Medicine, Center for Precision Medicine, University of Texas Health San Antonio, San Antonio, TX 78229, USA; Department of Medicine/Cardiology/Diabetes/Nephrology Divisions, University of Texas Health San Antonio, San Antonio, TX 78229, USA
| | - Travis R Madaris
- Department of Medicine, Center for Precision Medicine, University of Texas Health San Antonio, San Antonio, TX 78229, USA; Department of Medicine/Cardiology/Diabetes/Nephrology Divisions, University of Texas Health San Antonio, San Antonio, TX 78229, USA
| | - Christopher E Shannon
- Department of Medicine/Cardiology/Diabetes/Nephrology Divisions, University of Texas Health San Antonio, San Antonio, TX 78229, USA
| | - Luke Norton
- Department of Medicine/Cardiology/Diabetes/Nephrology Divisions, University of Texas Health San Antonio, San Antonio, TX 78229, USA
| | - Soundarya Kandala
- Department of Medicine, Center for Precision Medicine, University of Texas Health San Antonio, San Antonio, TX 78229, USA; Department of Medicine/Cardiology/Diabetes/Nephrology Divisions, University of Texas Health San Antonio, San Antonio, TX 78229, USA
| | - Jeffrey Caplan
- Department of Biological Sciences, Delaware Biotechnology Institute, University of Delaware, Newark, DE 19711, USA
| | - Subramanya Srikantan
- Department of Medicine, Center for Precision Medicine, University of Texas Health San Antonio, San Antonio, TX 78229, USA; Department of Medicine/Cardiology/Diabetes/Nephrology Divisions, University of Texas Health San Antonio, San Antonio, TX 78229, USA
| | - Peter B Stathopulos
- Department of Physiology and Pharmacology, Western University, London, ON N6A 5C1, Canada
| | - W Brian Reeves
- Department of Medicine, Center for Precision Medicine, University of Texas Health San Antonio, San Antonio, TX 78229, USA; Department of Medicine/Cardiology/Diabetes/Nephrology Divisions, University of Texas Health San Antonio, San Antonio, TX 78229, USA
| | - Muniswamy Madesh
- Department of Medicine, Center for Precision Medicine, University of Texas Health San Antonio, San Antonio, TX 78229, USA; Department of Medicine/Cardiology/Diabetes/Nephrology Divisions, University of Texas Health San Antonio, San Antonio, TX 78229, USA.
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19
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Inhibition of Mg 2+ Extrusion Attenuates Glutamate Excitotoxicity in Cultured Rat Hippocampal Neurons. Nutrients 2020; 12:nu12092768. [PMID: 32927908 PMCID: PMC7551965 DOI: 10.3390/nu12092768] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/1970] [Revised: 09/04/2020] [Accepted: 09/08/2020] [Indexed: 02/05/2023] Open
Abstract
Magnesium plays important roles in the nervous system. An increase in the Mg2+ concentration in cerebrospinal fluid enhances neural functions, while Mg2+ deficiency is implicated in neuronal diseases in the central nervous system. We have previously demonstrated that high concentrations of glutamate induce excitotoxicity and elicit a transient increase in the intracellular concentration of Mg2+ due to the release of Mg2+ from mitochondria, followed by a decrease to below steady-state levels. Since Mg2+ deficiency is involved in neuronal diseases, this decrease presumably affects neuronal survival under excitotoxic conditions. However, the mechanism of the Mg2+ decrease and its effect on the excitotoxicity process have not been elucidated. In this study, we demonstrated that inhibitors of Mg2+ extrusion, quinidine and amiloride, attenuated glutamate excitotoxicity in cultured rat hippocampal neurons. A toxic concentration of glutamate induced both Mg2+ release from mitochondria and Mg2+ extrusion from cytosol, and both quinidine and amiloride suppressed only the extrusion. This resulted in the maintenance of a higher Mg2+ concentration in the cytosol than under steady-state conditions during the ten-minute exposure to glutamate. These inhibitors also attenuated the glutamate-induced depression of cellular energy metabolism. Our data indicate the importance of Mg2+ regulation in neuronal survival under excitotoxicity.
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Chen YJ, Cheng FC, Chen CJ, Su HL, Sheu ML, Sheehan J, Pan HC. Down-Regulated Expression of Magnesium Transporter Genes Following a High Magnesium Diet Attenuates Sciatic Nerve Crush Injury. Neurosurgery 2020; 84:965-976. [PMID: 29672725 DOI: 10.1093/neuros/nyy120] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2017] [Accepted: 03/10/2018] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Magnesium supplementation has potential for use in nerve regeneration. The expression of some magnesium transporter genes is reflective of the intracellular magnesium levels. OBJECTIVE To assess the expression of various magnesium transporter genes as they relate to neurological alterations in a sciatic nerve injury model. METHODS Sciatic nerve injury was induced in rats, which were then fed either basal or high magnesium diets. Magnesium concentrations and 5 magnesium transporter genes (SLC41A1, MAGT1, CNNM2, TRPM6, and TRPM7) were measured in the tissue samples. RESULTS The high magnesium diet attenuated cytoskeletal loss in a dose-dependent manner in isolated nerve explants. The high magnesium diet augmented nerve regeneration and led to the restoration of nerve structure, increased S-100, and neurofilaments. This increased regeneration was consistent with the improvement of neurobehavioral and electrophysiological assessment. The denervated muscle morphology was restored with the high magnesium diet, and that was also highly correlated with the increased expression of desmin and acetylcholine receptors in denervated muscle. The plasma magnesium levels were significantly elevated after the animals consumed a high magnesium diet and were reciprocally related to the down-regulation of CNNM2, MagT1, and SCL41A1 in the blood monocytes, nerves, and muscle tissues of the nerve crush injury model. CONCLUSION The increased plasma magnesium levels after consuming a high magnesium diet were highly correlated with the down-regulation of magnesium transporter genes in monocytes, nerves, and muscle tissues after sciatic nerve crush injury. The study findings suggest that there are beneficial effects of administering magnesium after a nerve injury.
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Affiliation(s)
- Ying-Ju Chen
- Department of food and nutrition, Providence University, Taichung, Taiwan
| | - Fu-Chou Cheng
- Department of Medical Research, Taichung Veterans General Hospital, Taichung, Taiwan
| | - Chun-Jung Chen
- Department of Medical Research, Taichung Veterans General Hospital, Taichung, Taiwan
| | - Hong-Lin Su
- Department of Life Sciences, Agriculture Biotechnology Center, National Chung-Hsing University, Taichung, Taiwan
| | - Meei-Ling Sheu
- Institute of Biomedical Sciences, National Chung-Hsing University, Taichung, Taiwan
| | - Jason Sheehan
- Department of Neurosurgery, University of Virginia, Charlottesville, Virginia
| | - Hung-Chuan Pan
- Department of Neurosurgery, Taichung Veterans General Hospital, Taichung, Taiwan.,Faculty of Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan
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Cibulka M, Brodnanova M, Grendar M, Grofik M, Kurca E, Pilchova I, Osina O, Tatarkova Z, Dobrota D, Kolisek M. SNPs rs11240569, rs708727, and rs823156 in SLC41A1 Do Not Discriminate Between Slovak Patients with Idiopathic Parkinson's Disease and Healthy Controls: Statistics and Machine-Learning Evidence. Int J Mol Sci 2019; 20:ijms20194688. [PMID: 31546642 PMCID: PMC6801379 DOI: 10.3390/ijms20194688] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2019] [Revised: 09/17/2019] [Accepted: 09/19/2019] [Indexed: 12/28/2022] Open
Abstract
Gene SLC41A1 (A1) is localized within Parkinson’s disease-(PD)-susceptibility locus PARK16 and encodes for the Na+/Mg2+-exchanger. The association of several A1 SNPs with PD has been studied. Two, rs11240569 and rs823156, have been associated with reduced PD-susceptibility primarily in Asian populations. Here, we examined the association of rs11240569, rs708727, and rs823156 with PD in the Slovak population and their power to discriminate between PD patients and healthy controls. The study included 150 PD patients and 120 controls. Genotyping was performed with the TaqMan® approach. Data were analyzed by conventional statistics and Random Forest machine-learning (ML) algorithm. Individually, none of the three SNPs is associated with an altered risk for PD-onset in Slovaks. However, a combination of genotypes of SNP-triplet GG(rs11240569)/AG(rs708727)/AA(rs823156) is significantly (p < 0.05) more frequent in the PD (13.3%) than in the control (5%) cohort. ML identified the power of the tested SNPs in isolation or of their singlets (joined), duplets and triplets to discriminate between PD-patients and healthy controls as zero. Our data further substantiate differences between diverse populations regarding the association of A1 polymorphisms with PD-susceptibility. Lack of power of the tested SNPs to discriminate between PD and healthy cases render their clinical/diagnostic relevance in the Slovak population negligible.
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Affiliation(s)
- Michal Cibulka
- Division of Neurosciences, Biomedical Center Martin, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, 03601 Martin, Slovakia.
- Department of Medical Biochemistry, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, 03601 Martin, Slovakia.
| | - Maria Brodnanova
- Division of Neurosciences, Biomedical Center Martin, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, 03601 Martin, Slovakia.
- Department of Medical Biochemistry, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, 03601 Martin, Slovakia.
| | - Marian Grendar
- Department of Bioinformatics, Biomedical Center Martin, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, 03601 Martin, Slovakia.
| | - Milan Grofik
- Clinic of Neurology, University Hospital in Martin, 03601 Martin, Slovakia.
| | - Egon Kurca
- Clinic of Neurology, University Hospital in Martin, 03601 Martin, Slovakia.
| | - Ivana Pilchova
- Division of Neurosciences, Biomedical Center Martin, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, 03601 Martin, Slovakia.
| | - Oto Osina
- Clinic of Occupational Medicine and Toxicology, University Hospital in Martin, 03601 Martin, Slovakia.
| | - Zuzana Tatarkova
- Department of Medical Biochemistry, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, 03601 Martin, Slovakia.
| | - Dusan Dobrota
- Division of Neurosciences, Biomedical Center Martin, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, 03601 Martin, Slovakia.
- Department of Medical Biochemistry, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, 03601 Martin, Slovakia.
| | - Martin Kolisek
- Division of Neurosciences, Biomedical Center Martin, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, 03601 Martin, Slovakia.
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22
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Magnesium Is a Key Player in Neuronal Maturation and Neuropathology. Int J Mol Sci 2019; 20:ijms20143439. [PMID: 31336935 PMCID: PMC6678825 DOI: 10.3390/ijms20143439] [Citation(s) in RCA: 79] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2019] [Revised: 07/06/2019] [Accepted: 07/09/2019] [Indexed: 01/05/2023] Open
Abstract
Magnesium (Mg) is the second most abundant cation in mammalian cells, and it is essential for numerous cellular processes including enzymatic reactions, ion channel functions, metabolic cycles, cellular signaling, and DNA/RNA stabilities. Because of the versatile and universal nature of Mg2+, the homeostasis of intracellular Mg2+ is physiologically linked to growth, proliferation, differentiation, energy metabolism, and death of cells. On the cellular and tissue levels, maintaining Mg2+ within optimal levels according to the biological context, such as cell types, developmental stages, extracellular environments, and pathophysiological conditions, is crucial for development, normal functions, and diseases. Hence, Mg2+ is pathologically involved in cancers, diabetes, and neurodegenerative diseases, such as Parkinson's disease, Alzheimer's disease, and demyelination. In the research field regarding the roles and mechanisms of Mg2+ regulation, numerous controversies caused by its versatility and complexity still exist. As Mg2+, at least, plays critical roles in neuronal development, healthy normal functions, and diseases, appropriate Mg2+ supplementation exhibits neurotrophic effects in a majority of cases. Hence, the control of Mg2+ homeostasis can be a candidate for therapeutic targets in neuronal diseases. In this review, recent results regarding the roles of intracellular Mg2+ and its regulatory system in determining the cell phenotype, fate, and diseases in the nervous system are summarized, and an overview of the comprehensive roles of Mg2+ is provided.
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23
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Lin L, Yan M, Wu B, Lin R, Zheng Z. Expression of magnesium transporter SLC41A1 in the striatum of 6-hydroxydopamine-induced parkinsonian rats. Brain Res Bull 2018; 142:338-343. [DOI: 10.1016/j.brainresbull.2018.08.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Revised: 08/13/2018] [Accepted: 08/28/2018] [Indexed: 11/30/2022]
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24
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Schäffers OJM, Hoenderop JGJ, Bindels RJM, de Baaij JHF. The rise and fall of novel renal magnesium transporters. Am J Physiol Renal Physiol 2018; 314:F1027-F1033. [DOI: 10.1152/ajprenal.00634.2017] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Body Mg2+ balance is finely regulated in the distal convoluted tubule (DCT), where a tight interplay among transcellular reabsorption, mitochondrial exchange, and basolateral extrusion takes place. In the last decades, several research groups have aimed to identify the molecular players in these processes. A multitude of proteins have been proposed to function as Mg2+ transporter in eukaryotes based on phylogenetic analysis, differential gene expression, and overexpression studies. However, functional evidence for many of these proteins is lacking. The aim of this review is, therefore, to critically reconsider all putative Mg2+ transporters and put their presumed function in context of the renal handling of Mg2+. Sufficient experimental evidence exists to acknowledge transient receptor potential melastatin (TRPM) 6 and TRPM7, solute carrier family 41 (SLC41) A1 and SLC41A3, and mitochondrial RNA splicing 2 (MRS2) as Mg2+ transporters. TRPM6/7 facilitate Mg2+ influx, SLC41A1 mediates Mg2+ extrusion, and MRS2 and SLC41A3 are implicated in mitochondrial Mg2+ homeostasis. These proteins are highly expressed in the DCT. The function of cyclin M (CNNM) proteins is still under debate. For the other proposed Mg2+ transporters including Mg2+ transporter subtype 1 (MagT1), nonimprinted in Prader-Willi/Angelman syndrome (NIPA), membrane Mg2+ transport (MMgT), Huntingtin-interacting protein 14 (HIP14), and ATP13A4, functional evidence is limited, or functions alternative to Mg2+ transport have been suggested. Additional characterization of their Mg2+ transport proficiency should be provided before further claims about their role as Mg2+ transporter can be made.
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Affiliation(s)
- Olivier J. M. Schäffers
- Department of Physiology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Joost G. J. Hoenderop
- Department of Physiology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - René J. M. Bindels
- Department of Physiology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Jeroen H. F. de Baaij
- Department of Physiology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
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25
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Maguire D, Neytchev O, Talwar D, McMillan D, Shiels PG. Telomere Homeostasis: Interplay with Magnesium. Int J Mol Sci 2018; 19:E157. [PMID: 29303978 PMCID: PMC5796106 DOI: 10.3390/ijms19010157] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2017] [Revised: 12/21/2017] [Accepted: 01/03/2018] [Indexed: 12/14/2022] Open
Abstract
Telomere biology, a key component of the hallmarks of ageing, offers insight into dysregulation of normative ageing processes that accompany age-related diseases such as cancer. Telomere homeostasis is tightly linked to cellular metabolism, and in particular with mitochondrial physiology, which is also diminished during cellular senescence and normative physiological ageing. Inherent in the biochemistry of these processes is the role of magnesium, one of the main cellular ions and an essential cofactor in all reactions that use ATP. Magnesium plays an important role in many of the processes involved in regulating telomere structure, integrity and function. This review explores the mechanisms that maintain telomere structure and function, their influence on circadian rhythms and their impact on health and age-related disease. The pervasive role of magnesium in telomere homeostasis is also highlighted.
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Affiliation(s)
- Donogh Maguire
- Emergency Medicine Department, Glasgow Royal Infirmary, Glasgow G4 0SF, UK.
- Academic Unit of Surgery, School of Medicine, University of Glasgow, Glasgow Royal Infirmary, Glasgow G4 0SF, UK.
| | - Ognian Neytchev
- Section of Epigenetics, Institute of Cancer Sciences, University of Glasgow, Glasgow G61 1QH, UK.
| | - Dinesh Talwar
- The Scottish Trace Element and Micronutrient Reference Laboratory, Department of Biochemistry, Royal Infirmary, Glasgow G31 2ER, UK.
| | - Donald McMillan
- Academic Unit of Surgery, School of Medicine, University of Glasgow, Glasgow Royal Infirmary, Glasgow G4 0SF, UK.
| | - Paul G Shiels
- Section of Epigenetics, Institute of Cancer Sciences, University of Glasgow, Glasgow G61 1QH, UK.
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26
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Giménez-Mascarell P, Schirrmacher CE, Martínez-Cruz LA, Müller D. Novel Aspects of Renal Magnesium Homeostasis. Front Pediatr 2018; 6:77. [PMID: 29686978 PMCID: PMC5900390 DOI: 10.3389/fped.2018.00077] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Accepted: 03/13/2018] [Indexed: 12/29/2022] Open
Abstract
Magnesium (Mg2+) is indispensable for several vital functions, such as neurotransmission, cardiac conductance, blood glucose, blood pressure regulation, and proper function of more than 300 enzymes. Thus, Mg2+ homeostasis is subject to tight regulation. Besides the fast and immediate regulation of plasma Mg2+, a major part of Mg2+ homeostasis is realized by a concerted action of epithelial molecular structures that tightly control intestinal uptake and renal absorption. This mechanism is provided by a combination of para- and transcellular pathways. Whereas the first pathway provides the organism with a maximal amount of vital substances by a minimal energy expenditure, the latter enables controlling and fine-tuning by means of local and regional regulatory systems and also, hormonal control. The paracellular pathway is driven by an electrochemical gradient and realized in principal by the tight junction (TJ), a supramolecular organization of membrane-bound proteins and their adaptor and scaffolding proteins. TJ determinants are claudins (CLDN), a family of membrane spanning proteins that generate a barrier or a pore between two adjacent epithelial cells. Many insights into molecular mechanisms of Mg2+ handling have been achieved by the identification of alterations and mutations in human genes which cause disorders of paracellular Mg2+ pathways (CLDN10, CLDN14, CLDN16, CLDN19). Also, in the distal convoluted tubule, a basolateral protein, CNNM2, causes if mutated, familial dominant and also recessive renal Mg2+ wasting, albeit its true function has not been clarified yet, but is assumed to play a key role in the transcellular pathway. Moreover, mutations in human genes that are involved in regulating these proteins directly or indirectly cause, if mutated human diseases, mostly in combination with comorbidities as diabetes, cystic renal disease, or metabolic abnormalities. Generation and characterization of animal models harboring the corresponding mutations have further contributed to the elucidation of physiology and pathophysiology of Mg2+ disorders. Finally, high-end crystallization techniques allow understanding of Mg2+ handling in more detail. As this field is rapidly growing, we describe here the principles of physiology and pathophysiology of epithelial transport of renal Mg2+ homeostasis with emphasis on recently identified mechanisms involved.
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Affiliation(s)
| | - Carlotta Else Schirrmacher
- Department of Pediatric Gastroenterology, Nephrology and Metabolism, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | | | - Dominik Müller
- Department of Pediatric Gastroenterology, Nephrology and Metabolism, Charité - Universitätsmedizin Berlin, Berlin, Germany
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Magnesium Extravaganza: A Critical Compendium of Current Research into Cellular Mg 2+ Transporters Other than TRPM6/7. Rev Physiol Biochem Pharmacol 2018; 176:65-105. [PMID: 30406297 DOI: 10.1007/112_2018_15] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Magnesium research has boomed within the last 20 years. The real breakthrough came at the start of the new millennium with the discovery of a plethora of possible Mg homeostatic factors that, in particular, included putative Mg2+ transporters. Until that point, Mg research was limited to biochemical and physiological work, as no target molecular entities were known that could be used to explore the molecular biology of Mg homeostasis at the level of the cell, tissue, organ, or organism and to translate such knowledge into the field of clinical medicine and pharmacology. Because of the aforementioned, Mg2+ and Mg homeostasis, both of which had been heavily marginalized within the biomedical field in the twentieth century, have become overnight a focal point of many studies ranging from primary biomedical research to translational medicine.The amount of literature concerning cellular Mg2+ transport and cellular Mg homeostasis is increasing, together with a certain amount of confusion, especially about the function(s) of the newly discovered and, in the majority of instances, still only putative Mg2+ transporters/Mg2+ homeostatic factors. Newcomers to the field of Mg research will thus find it particularly difficult to orient themselves.Here, we briefly but critically summarize the status quo of the current understanding of the molecular entities behind cellular Mg2+ homeostasis in mammalian/human cells other than TRPM6/7 chanzymes, which have been universally accepted as being unspecific cation channel kinases allowing the flux of Mg2+ while constituting the major gateway for Mg2+ to enter the cell.
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28
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Jin X, Liu MY, Zhang DF, Gao H, Wei MJ. Elevated circulating magnesium levels in patients with Parkinson's disease: a meta-analysis. Neuropsychiatr Dis Treat 2018; 14:3159-3168. [PMID: 30510425 PMCID: PMC6250112 DOI: 10.2147/ndt.s186209] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND The association between circulating magnesium (Mg) and Parkinson's disease (PD) remains ambiguous and controversial. Thus, a meta-analysis was conducted to evaluate the circulating Mg levels in PD patients and to clarify whether high circulating Mg levels should be considered as a potential risk factor for PD. METHODS In this study, 17 case-control published studies were selected in our meta-analysis by searching the electronic databases of Web of Science, PubMed, and China National Knowledge Infrastructure (CNKI) before June 1, 2018. Overall, 848 PD cases and 784 healthy controls (HC), 1,023 PD cases and 911 HC, and 180 PD cases and 144 HC met the inclusion criteria for this study Mg levels in serum, peripheral blood, and cerebrospinal fluid (CSF), respectively. Standardized mean difference (SMD) in random-effects model and 95% CI were used to assess the correlation strength through the comparison of the two groups. RESULTS Meta-analysis showed that the serum Mg levels in PD cases were significantly higher than those in HC individuals (SMD =1.09, 95% CI =0.52, 1.66). Furthermore, this result was further confirmed by the combined analysis of serum and whole blood studies together (SMD =0.64, 95% CI =0.10, 1.19). In addition, the higher CSF Mg levels in patients of PD were observed in comparison with normal range (SMD =0.55, 95% CI =0.21, 0.88). However, this data did not further discuss and analyze because of the smaller sample size of CSF studies. CONCLUSION Our findings supported the notion that the increase of circulating Mg levels appears in the patients with PD.
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Affiliation(s)
- Xin Jin
- School of Pharmacy, Department of Pharmacognosy, China Medical University, Shenyang, Liaoning, China
| | - Ming-Yan Liu
- School of Pharmacy, Department of Pharmacology, China Medical University, Shenyang, Liaoning, China,
| | - Dong-Fang Zhang
- School of Pharmacy, Department of Pharmacognosy, China Medical University, Shenyang, Liaoning, China
| | - Hua Gao
- Division of Pharmacology Laboratory, National Institutes for Food and Drug Control, Beijing, China
| | - Min-Jie Wei
- School of Pharmacy, Department of Pharmacology, China Medical University, Shenyang, Liaoning, China, .,Liaoning Key Laboratory of Molecular Targeted Anti-Tumor Drug Development and Evaluation, Shenyang, Liaoning, China,
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29
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Sponder G, Abdulhanan N, Fröhlich N, Mastrototaro L, Aschenbach JR, Röntgen M, Pilchova I, Cibulka M, Racay P, Kolisek M. Overexpression of Na +/Mg 2+ exchanger SLC41A1 attenuates pro-survival signaling. Oncotarget 2017; 9:5084-5104. [PMID: 29435164 PMCID: PMC5797035 DOI: 10.18632/oncotarget.23598] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Accepted: 11/13/2017] [Indexed: 01/07/2023] Open
Abstract
The Na+/Mg2+ exchanger SLC41A1 (A1), a key component of intracellular Mg homeostasis (IMH), is the major cellular Mg2+ efflux system, and its overexpression decreases [Mg2+]intracellular. IMH plays an important role in the regulation of many cellular processes, including cellular signaling. However, whether the overexpression of A1 and the consequent drop of [Mg2+]i impact on intracellular signaling is unknown. To examine the latter, we utilized dynamic mass redistribution (DMR) assay, PathScan® RTK signaling antibody (PRSA) array, confirmatory Western blot (WB) analyses of phosphorylation of kinases selected by PRSA, and mag-fura 2-assisted fast filter spectrometry (FFS). We demonstrate here that the overexpression of A1 quantitatively and qualitatively changes the DMR signal evoked by the application of PAR-1-selective activating peptide and/or by changing [Mg2+]extracellular in HEK293 cells. PRSA profiling of the phosphorylation of important signaling nodes followed by confirmatory WB has revealed that, in HEK293 cells, A1 overexpression significantly attenuates the phosphorylation of Akt/PKB on Thr308 and/or Ser473 and of Erk1/2 on Thr202/Tyr204 in the presence of 0 or 1 mM (physiological) Mg2+ in the bath solution. The latter is also true for SH-SY5Y and HeLa cells. Overexpression of A1 in HEK293 cells significantly lowers [Mg2+]i in the presence of [Mg2+]e = 0 or 1 mM. This correlates with the observed attenuation of prosurvival Akt/PKB - Erk1/2 signaling in these cells. Thus, A1 expression status and [Mg2+]e (and consequently also [Mg2+]i) modulate the complex physiological fingerprint of the cell and influence the activity of kinases involved in anti-apoptotic and, hence, pro-survival events in cells.
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Affiliation(s)
- Gerhard Sponder
- Institute of Veterinary-Physiology, Free University of Berlin, Berlin, Germany
| | - Nasrin Abdulhanan
- Institute of Veterinary-Physiology, Free University of Berlin, Berlin, Germany
| | - Nadine Fröhlich
- PerkinElmer Life and Analytical Sciences GmbH, Rodgau, Germany
| | - Lucia Mastrototaro
- Institute of Veterinary-Physiology, Free University of Berlin, Berlin, Germany
| | - Jörg R Aschenbach
- Institute of Veterinary-Physiology, Free University of Berlin, Berlin, Germany
| | - Monika Röntgen
- Leibnitz Institute for Farm Animal Biology, Department of Muscle and Growth Physiology, Dummerstorf, Germany
| | - Ivana Pilchova
- Biomedical Center Martin, Division of Neurosciences, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Martin, Slovakia
| | - Michal Cibulka
- Institute of Medical Biochemistry, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Martin, Slovakia
| | - Peter Racay
- Biomedical Center Martin, Division of Neurosciences, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Martin, Slovakia.,Institute of Medical Biochemistry, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Martin, Slovakia
| | - Martin Kolisek
- Institute of Veterinary-Physiology, Free University of Berlin, Berlin, Germany.,Biomedical Center Martin, Division of Neurosciences, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Martin, Slovakia
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30
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Tomita A, Zhang M, Jin F, Zhuang W, Takeda H, Maruyama T, Osawa M, Hashimoto KI, Kawasaki H, Ito K, Dohmae N, Ishitani R, Shimada I, Yan Z, Hattori M, Nureki O. ATP-dependent modulation of MgtE in Mg 2+ homeostasis. Nat Commun 2017; 8:148. [PMID: 28747715 PMCID: PMC5529423 DOI: 10.1038/s41467-017-00082-w] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Accepted: 05/26/2017] [Indexed: 11/09/2022] Open
Abstract
Magnesium is an essential ion for numerous physiological processes. MgtE is a Mg2+ selective channel involved in the maintenance of intracellular Mg2+ homeostasis, whose gating is regulated by intracellular Mg2+ levels. Here, we report that ATP binds to MgtE, regulating its Mg2+-dependent gating. Crystal structures of MgtE–ATP complex show that ATP binds to the intracellular CBS domain of MgtE. Functional studies support that ATP binding to MgtE enhances the intracellular domain affinity for Mg2+ within physiological concentrations of this divalent cation, enabling MgtE to function as an in vivo Mg2+ sensor. ATP dissociation from MgtE upregulates Mg2+ influx at both high and low intracellular Mg2+ concentrations. Using site-directed mutagenesis and structure based-electrophysiological and biochemical analyses, we identify key residues and main structural changes involved in the process. This work provides the molecular basis of ATP-dependent modulation of MgtE in Mg2+ homeostasis. MgtE is an Mg2+ transporter involved in Mg2+ homeostasis. Here, the authors report that ATP regulates the Mg+2-dependent gating of MgtE and use X-ray crystallography combined with functional studies to propose the molecular mechanisms involved in this process.
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Affiliation(s)
- Atsuhiro Tomita
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, 2-11-16 Yayoi, Bunkyo-ku, Tokyo, 113-0032, Japan
| | - Mingfeng Zhang
- State Key Laboratory of Medical Neurobiology, Collaborative Innovation Center of Genetics and Development, Institute of Brain Science, Department of Physiology and Biophysics, School of Life Sciences, Fudan University, 2005 Songhu Road, Yangpu District, Shanghai, 200438, China
| | - Fei Jin
- State Key Laboratory of Genetic Engineering, Collaborative Innovation Center of Genetics and Development, Department of Physiology and Biophysics, School of Life Sciences, Fudan University, 2005 Songhu Road, Yangpu District, Shanghai, 200438, China
| | - Wenhui Zhuang
- State Key Laboratory of Medical Neurobiology, Collaborative Innovation Center of Genetics and Development, Institute of Brain Science, Department of Physiology and Biophysics, School of Life Sciences, Fudan University, 2005 Songhu Road, Yangpu District, Shanghai, 200438, China
| | - Hironori Takeda
- Faculty of Life Science, Kyoto Sangyo University, Kamigamo-motoyama, Kita-ku, Kyoto, 603-8555, Japan
| | - Tatsuro Maruyama
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Masanori Osawa
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Ken-Ichi Hashimoto
- Department of Green and Sustainable Chemistry, Tokyo Denki University, 5 Asahi-cho, Senju, Adachi-ku, Tokyo, 120-8551, Japan
| | - Hisashi Kawasaki
- Department of Green and Sustainable Chemistry, Tokyo Denki University, 5 Asahi-cho, Senju, Adachi-ku, Tokyo, 120-8551, Japan
| | - Koichi Ito
- Department of Computational Biology and Medical Sciences, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa-shi, Chiba, 277-8562, Japan
| | - Naoshi Dohmae
- Biomolecular Characterization Unit, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako-shi, Saitama, 351-0198, Japan
| | - Ryuichiro Ishitani
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, 2-11-16 Yayoi, Bunkyo-ku, Tokyo, 113-0032, Japan
| | - Ichio Shimada
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Zhiqiang Yan
- State Key Laboratory of Medical Neurobiology, Collaborative Innovation Center of Genetics and Development, Institute of Brain Science, Department of Physiology and Biophysics, School of Life Sciences, Fudan University, 2005 Songhu Road, Yangpu District, Shanghai, 200438, China. .,Department of Human Anatomy, School of Basic Medicine Sciences, Southwest Medical University, Luzhou, Sichuan, 646000, China.
| | - Motoyuki Hattori
- State Key Laboratory of Genetic Engineering, Collaborative Innovation Center of Genetics and Development, Department of Physiology and Biophysics, School of Life Sciences, Fudan University, 2005 Songhu Road, Yangpu District, Shanghai, 200438, China.
| | - Osamu Nureki
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, 2-11-16 Yayoi, Bunkyo-ku, Tokyo, 113-0032, Japan.
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31
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Amiri FS, Kariminejad A. Juvenile nephronophthisis and dysthyroidism: a rare association. CEN Case Rep 2017; 6:98-104. [PMID: 28509138 DOI: 10.1007/s13730-017-0252-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Accepted: 02/07/2017] [Indexed: 11/28/2022] Open
Abstract
Nephronophthisis, an autosomal recessive kidney disease, represents the most frequent genetic cause of end-stage kidney disease in the first three decades of life. A 27-year-old male was presented with gait imbalance, sever pruritus since 10 days prior time of admission. In past medical history, he had bilateral cataract, torsional nystagmus, and bilateral optic nerve atrophy since 2 years of age. He was also mentioned history of multinodular goiter with dysfunctional thyroid state since 2 years before admission. At admission bilateral blindness, torsional nystagmus, asymmetric thyromegaly with nodularity was found in physical examination. Laboratory tests showed elevated urea and creatinine (200, 10.7 mg/dl), hypomagnesemia (1.1 mEq/l), decreased thyroid stimulating hormone (<0.004 mIU/l). Ophthalmologist consultation confirmed retinitis pigmentosa. Renal sonography showed small-sized kidneys. Brain magnetic resonance imaging did not reveal molar tooth sign. Genetic testing performed and a large homozygous deletion at the NPHP1 gene locus was found. The patient was diagnosed with juvenile nephronophthisis and consideration of dysthyroidism as extrarenal manifestation of nephronophthisis is suggested in this case. Furthermore, loss of function mutation in SLC41A1 gene that leads to magnesium depletion must be noted in patients with suspected to nephronophthisis.
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Affiliation(s)
- Fateme Shamekhi Amiri
- Division of Nephrology, Imam khomeini hospital, Faculty of medicine, National University of Tehran Medical Sciences, Tehran, Iran.
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32
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Kodzhahinchev V, Kovacevic D, Bucking C. Identification of the putative goldfish (Carassius auratus) magnesium transporter SLC41a1 and functional regulation in the gill, kidney, and intestine in response to dietary and environmental manipulations. Comp Biochem Physiol A Mol Integr Physiol 2017; 206:69-81. [PMID: 28130070 DOI: 10.1016/j.cbpa.2017.01.016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2016] [Revised: 01/19/2017] [Accepted: 01/20/2017] [Indexed: 10/20/2022]
Abstract
While magnesium requirements for teleost fish highlight the physiological importance of this cation for homeostasis, little is known regarding the molecular identity of transporters responsible for magnesium absorption or secretion. The recent characterization of the vertebrate magnesium transporter solute carrier 41a1 (SLC41a1) in the kidney of a euryhaline fish has provided a glimpse of possible moieties involved in piscine magnesium regulation. The present study obtained a novel SLC41a1 coding sequence for Carassius auratus and demonstrated ubiquitous expression in all tissues examined. Transcriptional regulation of SLC41a1 in response to dietary and environmental magnesium concentrations was observed across tissues. Specifically, decreased environmental magnesium correlated with decreased expression of SLC41a1 in the intestine, whereas the gill and kidney were unaffected. Dietary magnesium restriction correlated with decreased expression of SLC41a1 in the intestine and gill, while again no effects were detected in the kidney. Finally, elevated dietary magnesium correlated with increased expression of SLC41a1 in the kidney, while expression in the intestine and gill remained stable. Plasma magnesium was maintained in all treatments, and dietary assimilation efficiency increased with decreased dietary magnesium. Consumption of a single meal failed to impact SLC41a1 expression, and transcript abundance remained stable over the course of digestion in all treatments. Transcriptional regulation occurred between 7 and 14days following dietary and environmental manipulations and short-term regulation (e.g. <24h) was not observed. Overall the data supports transcriptional regulation of SLC41a1 reflecting a possible role in magnesium loss or secretion across tissues in fish.
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Affiliation(s)
| | - Drago Kovacevic
- York University, Department of Biology, 4700 Keele Street, Toronto, M3J 1P3, ON, Canada
| | - Carol Bucking
- York University, Department of Biology, 4700 Keele Street, Toronto, M3J 1P3, ON, Canada.
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33
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Sturgeon M, Wu P, Cornell R. SLC41A1 and TRPM7 in magnesium homeostasis and genetic risk for Parkinson's disease. JOURNAL OF NEUROLOGY & NEUROMEDICINE 2016; 1:23-28. [PMID: 31187092 PMCID: PMC6557452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Parkinson's disease (PD) is a neurodegenerative disorder of the central nervous system with a clinically heterogeneous presentation that includes progressive loss of dopaminergic (DA) neurons in the substantia nigra. A minority of PD cases are familial and are caused by mutations in single genes. Most cases, however, are idiopathic PD, a complex multifactorial disorder with environmental and genetic contributors to etiology. Here, we first briefly summarize published evidence that among environmental contributors is dietary deficiency of magnesium. We then review genetic data suggesting that mutations in genes encoding two proteins contributing to cellular magnesium homeostasis confer risk for PD or other Parkinsonian conditions. First, the gene encoding magnesium transporter SLC41A1 is, among others, a candidate for the causative gene in the PARK16 locus where variation is associated with risk for idiopathic Parkinsonian disease. Studies of the function of SLC41A1 in animal models are needed to test whether this protein has a role in maintenance of dopaminergic neurons. Second, in a small study, a hypomorphic variant of TRPM7, a magnesium-permeable channel, was over-represented in cases of amyotrophic lateral sclerosis/ Parkinson dementia complex versus controls from the same ethnic group. Although this association was not detected in a second study, in zebrafish Trpm7 is necessary for terminal differentiation and reduction of toxin-sensitivity in dopaminergic neurons. Overall, epidemiological results support the possibility that mutations in genes relevant to magnesium homeostasis would alter PD risk, but deeper genetic analyses of PD patients are necessary to confirm whether SLC41A1 and TRPM7 are among such genes.
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Affiliation(s)
- Morgan Sturgeon
- Molecular and Cell Biology Graduate Program, University of Iowa, Iowa City, Iowa
| | - Perry Wu
- Department of Anatomy and Cell Biology, University of Iowa, Iowa City, Iowa
| | - Robert Cornell
- Molecular and Cell Biology Graduate Program, University of Iowa, Iowa City, Iowa
- Department of Anatomy and Cell Biology, University of Iowa, Iowa City, Iowa
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Lin L, Ke Z, Lv M, Lin R, Wu B, Zheng Z. Effects of MgSO 4 and magnesium transporters on 6-hydroxydopamine-induced SH-SY5Y cells. Life Sci 2016; 172:48-54. [PMID: 28011227 DOI: 10.1016/j.lfs.2016.12.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2016] [Revised: 12/04/2016] [Accepted: 12/19/2016] [Indexed: 11/16/2022]
Abstract
AIMS The magnesium ion (Mg2+) fulfils several important functions for living organisms. We investigated whether there is a protective effect of MgSO4 on 6-OHDA-induced neurotoxicity in SH-SY5Y cells, and gained insight into the effects of cellular mRNA and protein expression of the magnesium transporters SLC41A1, NIPA1, MagT1 and CNNM2 on 6-OHDA-induced neurotoxicity. MAIN METHODS The effect of MgSO4 on cell viability in 6-OHDA-treated SH-SY5Y cells was measured using a CCK-8 kit. The mRNA and protein expression of SLC41A1, NIPA1, MagT1, and CNNM2 were detected using reverse transcription-qPCR and Western blot. KEY FINDINGS The results showed that SH-SY5Y cells treated with 25-50μM 6-OHDA for 24h significantly decreased cell viability, while if pre-incubated with 0.125-1mM MgSO4 for 1h before adding 6-OHDA it partially prevented the cell damage. There was a significant decrease in cellular mRNA and protein expression of SLC41A1, NIPA1, MagT1 and CNNM2 in 6-OHDA treated SH-SY5Y cells, and MgSO4 can reverse its decline. SIGNIFICANCE Our results suggest that MgSO4 may protect SH-SY5Y cells against 6-OHDA-induced cell injury and that gene expression of SLC41A1, NIPA1, MagT1, and CNNM2 might be involved in dopaminergic neurons.
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Affiliation(s)
- Ling Lin
- Key Laboratory of Brain Aging and Neurodegenerative Diseases, Fujian Medical University, Fuzhou 350122, China; Department of Biochemistry and Molecular Biology, Fujian Medical University, Fuzhou 350122, China
| | - Zili Ke
- Department of Biochemistry and Molecular Biology, Fujian Medical University, Fuzhou 350122, China
| | - Meiqi Lv
- Department of Biochemistry and Molecular Biology, Fujian Medical University, Fuzhou 350122, China
| | - Renxi Lin
- Department of Biochemistry and Molecular Biology, Fujian Medical University, Fuzhou 350122, China
| | - Bin Wu
- Department of Biochemistry and Molecular Biology, Fujian Medical University, Fuzhou 350122, China
| | - Zhihong Zheng
- Key Laboratory of Brain Aging and Neurodegenerative Diseases, Fujian Medical University, Fuzhou 350122, China; Department of Biochemistry and Molecular Biology, Fujian Medical University, Fuzhou 350122, China.
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Komiya Y, Runnels LW. TRPM channels and magnesium in early embryonic development. THE INTERNATIONAL JOURNAL OF DEVELOPMENTAL BIOLOGY 2016; 59:281-8. [PMID: 26679946 DOI: 10.1387/ijdb.150196lr] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Magnesium (Mg(2+)) is the second most abundant cellular cation and is essential for all stages of life, from the early embryo to adult. Mg(2+) deficiency causes or contributes to many human diseases, including migraine headaches, Parkinson's disease, Alzheimer's disease, hypotension, type 2 diabetes mellitus and cardiac arrhythmias. Although the concentration of Mg(2+) in the extracellular environment can vary significantly, the total intracellular Mg(2+) concentration is actively maintained within a relatively narrow range (14 - 20 mM) via tight, yet poorly understood, regulation of intracellular Mg(2+)by Mg(2+) transporters and Mg(2+)-permeant ion channels. Recent studies have continued to add to the growing number of Mg(2+) transporters and ion channels involved in Mg(2+) homeostasis, including TRPM6 and TRPM7, members of the transient receptor potential (TRP) ion channel family. Mutations in TRPM6, including amino acid substitutions that prevent its heterooligomerization with TRPM7, occur in the rare autosomal-recessive disease hypomagnesemia with secondary hypocalcemia (HSH). Genetic ablation of either gene in mice results in early embryonic lethality, raising the question of whether these channels' capacity to mediate Mg(2+) influx plays an important role in embryonic development. Here we review what is known of the function of Mg(2+) in early development and summarize recent findings regarding the function of the TRPM6 and TRPM7 ion channels during embryogenesis.
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Affiliation(s)
- Yuko Komiya
- Department of Pharmacology, Rutgers-Robert Wood Johnson Medical School, Piscataway, NJ, USA
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36
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Gopalai AA, Ahmad-Annuar A, Li HH, Zhao Y, Lim SY, Tan AH, Lim TT, Eow GB, Santhi P, Shanthi V, Norlinah MI, Aziz ZA, Lim SK, Tan CT, Tan EK. PARK16 is associated with PD in the Malaysian population. Am J Med Genet B Neuropsychiatr Genet 2016; 171:839-47. [PMID: 27174169 DOI: 10.1002/ajmg.b.32454] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Accepted: 04/19/2016] [Indexed: 11/06/2022]
Abstract
PARK16 was identified as a risk factor for Parkinson's disease in a Japanese cohort; however, subsequent studies in the other populations including the Chinese, European, Caucasian, and Chilean have shown a protective role instead. To investigate this locus in our Malaysian cohort, 1,144 individuals were screened for five SNPs in the PARK16 locus and logistic regression analysis showed that the A allele of the rs947211 SNP reduced the risk of developing PD via a recessive model (Odds ratio 0.57, P-value 0.0003). Pooled analysis with other Asian studies showed that A allele of the rs947211 SNP decreased the risk of developing PD via a recessive model (Odds ratio 0.71, P-value 0.0001). In addition, when meta-analysis was performed with other Asian population, three SNPs (rs823128, rs823156, and rs11240572) reduced risk of developing PD via a dominant model. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Aroma Agape Gopalai
- Faculty of Medicine, Department of Biomedical Science, University of Malaya, Kuala Lumpur, Malaysia
| | - Azlina Ahmad-Annuar
- Faculty of Medicine, Department of Biomedical Science, University of Malaya, Kuala Lumpur, Malaysia
| | - Hui-Hua Li
- Health Services Research, Singapore General Hospital, Singapore, Singapore
| | - Yi Zhao
- Department of Clinical Research, Singapore General Hospital, Singapore, Singapore
| | - Shen-Yang Lim
- Faculty of Medicine, Department of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Ai Huey Tan
- Faculty of Medicine, Department of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | | | - Gaik Bee Eow
- Department of Neurology, Hospital Pulau Pinang, Penang, Malaysia
| | | | | | | | - Zariah Abdul Aziz
- Department of Medicine, Hospital Sultanah Nur Zahirah, Kuala Terengganu, Malaysia
| | - Soo Kun Lim
- Faculty of Medicine, Department of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Chong Tin Tan
- Faculty of Medicine, Department of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Eng-King Tan
- Department of Neurology, Singapore General Hospital, Singapore, Singapore.,National Neuroscience Institute and Duke-NUS Graduate Medical School, Singapore
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Coherent and Contradictory Facts, Feats and Fictions Associated with Metal Accumulation in Parkinson's Disease: Epicenter or Outcome, Yet a Demigod Question. Mol Neurobiol 2016; 54:4738-4755. [PMID: 27480264 DOI: 10.1007/s12035-016-0016-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Accepted: 07/12/2016] [Indexed: 01/30/2023]
Abstract
Unwarranted exposure due to liberal use of metals for maintaining the lavish life and to achieve the food demand for escalating population along with an incredible boost in the average human life span owing to orchestrated progress in rejuvenation therapy have gradually increased the occurrence of Parkinson's disease (PD). Etiology is albeit elusive; association of PD with metal accumulation has never been overlooked due to noteworthy similitude between metal-exposure symptoms and a few cardinal features of disease. Even though metals are entailed in the vital functions, a hysterical shift, primarily augmentation, escorts the stern nigrostriatal dopaminergic neurodegeneration. An increase in the passage of metals through the blood brain barrier and impaired metabolic activity and elimination system could lead to metal accumulation in the brain, which eventually makes dopaminergic neurons quite susceptible. In the present article, an update on implication of metal accumulation in PD/Parkinsonism has been provided. Moreover, encouraging and paradoxical facts and fictions associated with metal accumulation in PD/Parkinsonism have also been compiled. Systematic literature survey of PD is performed to describe updated information if metal accumulation is an epicenter or merely an outcome. Finally, a perspective on the association of metal accumulation with pesticide-induced Parkinsonism has been explained to unveil the likely impact of the former in the latter.
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38
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de Baaij JHF, Arjona FJ, van den Brand M, Lavrijsen M, Lameris ALL, Bindels RJM, Hoenderop JGJ. Identification of SLC41A3 as a novel player in magnesium homeostasis. Sci Rep 2016; 6:28565. [PMID: 27349617 PMCID: PMC4923877 DOI: 10.1038/srep28565] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2015] [Accepted: 06/02/2016] [Indexed: 01/08/2023] Open
Abstract
Regulation of the body Mg(2+) balance takes place in the distal convoluted tubule (DCT), where transcellular reabsorption determines the final urinary Mg(2+) excretion. The basolateral Mg(2+) extrusion mechanism in the DCT is still unknown, but recent findings suggest that SLC41 proteins contribute to Mg(2+) extrusion. The aim of this study was, therefore, to characterize the functional role of SLC41A3 in Mg(2+) homeostasis using the Slc41a3 knockout (Slc41a3(-/-)) mouse. By quantitative PCR analysis it was shown that Slc41a3 is the only SLC41 isoform with enriched expression in the DCT. Interestingly, serum and urine electrolyte determinations demonstrated that Slc41a3(-/-) mice suffer from hypomagnesemia. The intestinal Mg(2+) absorption capacity was measured using the stable (25)Mg(2+) isotope in mice fed a low Mg(2+) diet. (25)Mg(2+) uptake was similar in wildtype (Slc41a3(+/+)) and Slc41a3(-/-) mice, although Slc41a3(-/-) animals exhibited increased intestinal mRNA expression of Mg(2+) transporters Trpm6 and Slc41a1. Remarkably, some of the Slc41a3(-/-) mice developed severe unilateral hydronephrosis. In conclusion, SLC41A3 was established as a new factor for Mg(2+) handling.
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Affiliation(s)
- Jeroen H F de Baaij
- Department of Physiology Radboud Institute for Molecular Life Sciences, Radboud university medical center, Nijmegen, The Netherlands
| | - Francisco J Arjona
- Department of Physiology Radboud Institute for Molecular Life Sciences, Radboud university medical center, Nijmegen, The Netherlands
| | - Michiel van den Brand
- Department of Pathology, Radboud Institute for Molecular Life Sciences, Radboud university medical center, Nijmegen, The Netherlands
| | - Marla Lavrijsen
- Department of Physiology Radboud Institute for Molecular Life Sciences, Radboud university medical center, Nijmegen, The Netherlands
| | - Anke L L Lameris
- Department of Physiology Radboud Institute for Molecular Life Sciences, Radboud university medical center, Nijmegen, The Netherlands
| | - René J M Bindels
- Department of Physiology Radboud Institute for Molecular Life Sciences, Radboud university medical center, Nijmegen, The Netherlands
| | - Joost G J Hoenderop
- Department of Physiology Radboud Institute for Molecular Life Sciences, Radboud university medical center, Nijmegen, The Netherlands
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39
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Solute carrier 41A3 encodes for a mitochondrial Mg(2+) efflux system. Sci Rep 2016; 6:27999. [PMID: 27302215 PMCID: PMC4908428 DOI: 10.1038/srep27999] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2016] [Accepted: 05/24/2016] [Indexed: 02/06/2023] Open
Abstract
The important role of magnesium (Mg2+) in normal cellular physiology requires flexible, yet tightly regulated, intracellular Mg2+ homeostasis (IMH). However, only little is known about Mg2+ transporters of subcellular compartments such as mitochondria, despite their obvious importance for the deposition and reposition of intracellular Mg2+ pools. In particular, knowledge about mechanisms responsible for extrusion of Mg2+ from mitochondria is lacking. Based on circumstantial evidence, two possible mechanisms of Mg2+ release from mitochondria were predicted: (1) Mg2+ efflux coupled to ATP translocation via the ATP-Mg/Pi carrier, and (2) Mg2+ efflux via a H+/Mg2+ exchanger. Regardless, the identity of the H+-coupled Mg2+ efflux system is unknown. We demonstrate here that member A3 of solute carrier (SLC) family 41 is a mitochondrial Mg2+ efflux system. Mitochondria of HEK293 cells overexpressing SLC41A3 exhibit a 60% increase in the extrusion of Mg2+ compared with control cells. This efflux mechanism is Na+-dependent and temperature sensitive. Our data identify SLC41A3 as the first mammalian mitochondrial Mg2+ efflux system, which greatly enhances our understanding of intracellular Mg2+ homeostasis.
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40
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Blauwendraat C, Francescatto M, Gibbs JR, Jansen IE, Simón-Sánchez J, Hernandez DG, Dillman AA, Singleton AB, Cookson MR, Rizzu P, Heutink P. Comprehensive promoter level expression quantitative trait loci analysis of the human frontal lobe. Genome Med 2016; 8:65. [PMID: 27287230 PMCID: PMC4903003 DOI: 10.1186/s13073-016-0320-1] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2015] [Accepted: 05/19/2016] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Expression quantitative trait loci (eQTL) analysis is a powerful method to detect correlations between gene expression and genomic variants and is widely used to interpret the biological mechanism underlying identified genome wide association studies (GWAS) risk loci. Numerous eQTL studies have been performed on different cell types and tissues of which the majority has been based on microarray technology. METHODS We present here an eQTL analysis based on cap analysis gene expression sequencing (CAGEseq) data created from human postmortem frontal lobe tissue combined with genotypes obtained through genotyping arrays, exome sequencing, and CAGEseq. Using CAGEseq as an expression profiling technique combined with these different genotyping techniques allows measurement of the molecular effect of variants on individual transcription start sites and increases the resolution of eQTL analysis by also including the non-annotated parts of the genome. RESULTS We identified 2410 eQTLs and show that non-coding transcripts are more likely to contain an eQTL than coding transcripts, in particular antisense transcripts. We provide evidence for how previously identified GWAS loci for schizophrenia (NRGN), Parkinson's disease, and Alzheimer's disease (PARK16 and MAPT loci) could increase the risk for disease at a molecular level. Furthermore, we demonstrate that CAGEseq improves eQTL analysis because variants obtained from CAGEseq are highly enriched for having a functional effect and thus are an efficient method towards the identification of causal variants. CONCLUSION Our data contain both coding and non-coding transcripts and has the added value that we have identified eQTLs for variants directly adjacent to TSS. Future eQTL studies would benefit from combining CAGEseq with RNA sequencing for a more complete interpretation of the transcriptome and increased understanding of eQTL signals.
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Affiliation(s)
- Cornelis Blauwendraat
- Applied Genomics for Neurodegenerative Diseases, German Center for Neurodegenerative Diseases (DZNE), Tübingen, Germany.
| | - Margherita Francescatto
- Genome Biology of Neurodegenerative Diseases, German Center for Neurodegenerative Diseases (DZNE), Tübingen, Germany
| | - J Raphael Gibbs
- Laboratory of Neurogenetics, National Institute on Aging (NIA), Bethesda, Maryland, USA.,Department of Molecular Neuroscience, Institute of Neurology, University College London, London, UK
| | - Iris E Jansen
- Genome Biology of Neurodegenerative Diseases, German Center for Neurodegenerative Diseases (DZNE), Tübingen, Germany.,Department of Clinical Genetics, VU University Medical Center (VUmc), Amsterdam, The Netherlands
| | - Javier Simón-Sánchez
- Genome Biology of Neurodegenerative Diseases, German Center for Neurodegenerative Diseases (DZNE), Tübingen, Germany.,Department of Neurodegenerative Diseases, Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany
| | - Dena G Hernandez
- Laboratory of Neurogenetics, National Institute on Aging (NIA), Bethesda, Maryland, USA
| | - Allissa A Dillman
- Laboratory of Neurogenetics, National Institute on Aging (NIA), Bethesda, Maryland, USA
| | - Andrew B Singleton
- Laboratory of Neurogenetics, National Institute on Aging (NIA), Bethesda, Maryland, USA
| | - Mark R Cookson
- Laboratory of Neurogenetics, National Institute on Aging (NIA), Bethesda, Maryland, USA
| | - Patrizia Rizzu
- Applied Genomics for Neurodegenerative Diseases, German Center for Neurodegenerative Diseases (DZNE), Tübingen, Germany
| | - Peter Heutink
- Genome Biology of Neurodegenerative Diseases, German Center for Neurodegenerative Diseases (DZNE), Tübingen, Germany.,Department of Clinical Genetics, VU University Medical Center (VUmc), Amsterdam, The Netherlands.,Department of Neurodegenerative Diseases, Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany
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41
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Sponder G, Mastrototaro L, Kurth K, Merolle L, Zhang Z, Abdulhanan N, Smorodchenko A, Wolf K, Fleig A, Penner R, Iotti S, Aschenbach JR, Vormann J, Kolisek M. Human CNNM2 is not a Mg(2+) transporter per se. Pflugers Arch 2016; 468:1223-1240. [PMID: 27068403 DOI: 10.1007/s00424-016-1816-7] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2015] [Revised: 03/15/2016] [Accepted: 03/23/2016] [Indexed: 11/26/2022]
Abstract
CNNM2 is associated with the regulation of serum Mg concentration, and when mutated, with severe familial hypomagnesemia. The function and cellular localization of CNNM2 and its isomorphs (Iso) remain controversial. The objective of this work was to examine the following: (1) the transcription-responsiveness of CNNM2 to Mg starvation, (2) the cellular localization of Iso1 and Iso2, (3) the ability of Iso1 and Iso2 to transport Mg(2+), and (4) the complex-forming ability and spectra of potential interactors of Iso1 and Iso2. The five main findings are as follows. (1) Mg-starvation induces CNNM2 overexpression that is markedly higher in JVM-13 cells (lymphoblasts) compared with Jurkat cells (T-lymphocytes). (2) Iso1 and Iso2 localize throughout various subcellular compartments in transgenic HEK293 cells overexpressing Iso1 or Iso2. (3) Iso1 and Iso2 do not transport Mg(2+) in an electrogenic or electroneutral mode in transgenic HEK293 cells overexpressing Iso1 or Iso2. (4) Both Iso1 and Iso2 form complexes of a higher molecular order. (5) The spectrum of potential interactors of Iso1 is ten times smaller than that of Iso2. We conclude that sensitivity of CNNM2 expression to extracellular Mg(2+) depletion depends on cell type. Iso1 and Iso2 exhibit a dispersed pattern of cellular distribution; thus, they are not exclusively integral to the cytoplasmic membrane. Iso1 and Iso2 are not Mg(2+) transporters per se. Both isomorphs form protein complexes, and divergent spectra of potential interactors of Iso1 and Iso2 indicate that each isomorph has a distinctive function. CNNM2 is therefore the first ever identified Mg(2+) homeostatic factor without being a Mg(2+) transporter per se.
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Affiliation(s)
- Gerhard Sponder
- Institute of Veterinary-Physiology, Free University of Berlin, Oertzenweg 19b, 14163, Berlin, Germany
| | - Lucia Mastrototaro
- Institute of Veterinary-Physiology, Free University of Berlin, Oertzenweg 19b, 14163, Berlin, Germany
| | - Katharina Kurth
- Institute of Veterinary-Physiology, Free University of Berlin, Oertzenweg 19b, 14163, Berlin, Germany
- Landesuntersuchungsanstalt Sachsen, Jägerstraße 8/10, Dresden, Germany
| | - Lucia Merolle
- Department of Pharmacy and Biotechnology, University of Bologna, Via Massarenti 9, Bologna, Italy
- Elettra-Sincrotrone Trieste S.C.p.A., Strada Statale 14 AREA Science Park, Basovizza, Italy
| | - Zheng Zhang
- The Queen's Medical Center, Center for Biomedical Research, 1356 Lusitana Street, UH Tower 8, Honolulu, HI, USA
| | - Nasrin Abdulhanan
- Institute of Veterinary-Physiology, Free University of Berlin, Oertzenweg 19b, 14163, Berlin, Germany
| | - Alina Smorodchenko
- Institute of Veterinary-Physiology, Free University of Berlin, Oertzenweg 19b, 14163, Berlin, Germany
- Institute of Vegetative Anatomy, Charité - Universitätsmedizin Berlin, Campus Charité Mitte, Philippstrasse 12, Berlin, Germany
| | - Katharina Wolf
- Institute of Veterinary-Physiology, Free University of Berlin, Oertzenweg 19b, 14163, Berlin, Germany
| | - Andrea Fleig
- The Queen's Medical Center, Center for Biomedical Research, 1356 Lusitana Street, UH Tower 8, Honolulu, HI, USA
| | - Reinhold Penner
- The Queen's Medical Center, Center for Biomedical Research, 1356 Lusitana Street, UH Tower 8, Honolulu, HI, USA
| | - Stefano Iotti
- Department of Pharmacy and Biotechnology, University of Bologna, Via Massarenti 9, Bologna, Italy
| | - Jörg R Aschenbach
- Institute of Veterinary-Physiology, Free University of Berlin, Oertzenweg 19b, 14163, Berlin, Germany
| | - Jürgen Vormann
- Institute for Prevention and Nutrition (IPEV), Adalperostrasse 37, Munich, Ismaning, Germany
| | - Martin Kolisek
- Institute of Veterinary-Physiology, Free University of Berlin, Oertzenweg 19b, 14163, Berlin, Germany.
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Miyake Y, Tanaka K, Fukushima W, Kiyohara C, Sasaki S, Tsuboi Y, Oeda T, Shimada H, Kawamura N, Sakae N, Fukuyama H, Hirota Y, Nagai M, Nakamura Y. PARK16 polymorphisms, interaction with smoking, and sporadic Parkinson's disease in Japan. J Neurol Sci 2016; 362:47-52. [PMID: 26944116 DOI: 10.1016/j.jns.2016.01.021] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2015] [Revised: 12/15/2015] [Accepted: 01/12/2016] [Indexed: 11/15/2022]
Abstract
Epidemiological evidence on the relationships between PARK16 single nucleotide polymorphisms (SNPs) and Parkinson's disease (PD) is inconsistent. We examined this issue in Japan. Included were 229 cases within six years of PD onset. Controls were 356 patients without neurodegenerative disease. Compared with subjects with the AA genotype of SNP rs823128, those with the AG genotype, but not the GG genotype, had a significantly reduced risk of sporadic PD. Compared with the AA genotype of SNP rs947211, both the AG genotype and the GG genotype were significantly related to an increased risk of sporadic PD. Using subjects with the AA genotype of SNP rs823156 as a reference group, there were significant inverse relationships under the additive and dominant models. No significant relationships were found between SNPs rs16856139 or rs11240572 and sporadic PD. The CAAAC, the TGAGA, and the CAGAC haplotypes were significantly related to sporadic PD. The additive interaction between SNP rs823128 and smoking affecting sporadic PD was significant, although the multiplicative interaction was not significant. The PARK16 SNPs rs823128, rs947211, and rs823156 and the CAAAC, TGAGA, and CAGAC haplotypes may be significantly associated with sporadic PD in Japan. New evidence of an additive interaction between SNP rs823156 and smoking is suggested.
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Affiliation(s)
- Yoshihiro Miyake
- Department of Epidemiology and Preventive Medicine, Ehime University Graduate School of Medicine, Ehime 791-0295, Japan.
| | - Keiko Tanaka
- Department of Epidemiology and Preventive Medicine, Ehime University Graduate School of Medicine, Ehime 791-0295, Japan
| | - Wakaba Fukushima
- Department of Public Health, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Chikako Kiyohara
- Department of Preventive Medicine, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Satoshi Sasaki
- Department of Social and Preventive Epidemiology, School of Public Health, The University of Tokyo, Tokyo, Japan
| | - Yoshio Tsuboi
- Department of Neurology, Faculty of Medicine, Fukuoka University, Fukuoka, Japan
| | - Tomoko Oeda
- Clinical Research Institute and Department of Neurology, Utano National Hospital, Kyoto, Japan
| | - Hiroyuki Shimada
- Department of Geriatrics and Neurology, Osaka City University Graduate School of Medicine, Osaka, Japan
| | | | - Nobutaka Sakae
- Department of Neurology, Neurological Institute, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Hidenao Fukuyama
- Human Brain Research Center, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | | | - Masaki Nagai
- Department of Public Health, Saitama Medical University Faculty of Medicine, Saitama, Japan
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Wang L, Cheng L, Li NN, Yu WJ, Sun XY, Peng R. Genetic analysis of SLC41A1 in Chinese Parkinson's disease patients. Am J Med Genet B Neuropsychiatr Genet 2015; 168:706-11. [PMID: 26308152 DOI: 10.1002/ajmg.b.32365] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/01/2015] [Accepted: 08/11/2015] [Indexed: 02/05/2023]
Abstract
Sequence variants in SLC41A1 (solute carrier family 41 member 1) within the PARK16 locus have been reported to be associated with Parkinson's disease (PD). We performed direct DNA sequencing of the SLC41A1 gene in 100 early-onset PD cases. A novel intron variant (NM_173854.5:c.993-90delA) and a known synonymous-coding variant (NM_173854.5:c.339 C>T, causing p.Thr113Thr, rs11240569) were identified in the SLC41A1 gene. Then we genotyped the rs11240569 variant in a total of 2237 Han Chinese comprising of 1063 sporadic PD and 1174 controls to investigate the association with risk of PD, we also conducted further stratified analysis according to age at onset and compared the clinical characteristics of CC + CT subjects with TT subjects. In this study, we confirmed that the C allele of SLC41A1 (rs11240569) polymorphism reduces the risk to develop sporadic PD (P = 0.018). Additionally, subjects with CC + CT genotypes have a reduced risk compared to those with TT genotype (P = 0.022), the association was modestly seen among the younger age group (P = 0.05), but was not significant among the older age group (P = 0.641). Besides, we demonstrated that CC + CT subjects cannot be distinguished from TT subjects based on their clinical features. Our study, the first demonstrates that SLC41A1 (rs11240569) is associated with a lower risk of PD in a Han Chinese population from mainland China.
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Affiliation(s)
- Ling Wang
- Department of Neurology, West China Hospital, Sichuan University, Sichuan, P. R. China
| | - Lan Cheng
- Department of Neurology, West China Hospital, Sichuan University, Sichuan, P. R. China
| | - Nan-Nan Li
- Department of Neurology, West China Hospital, Sichuan University, Sichuan, P. R. China
| | - Wen-Juan Yu
- Department of Neurology, West China Hospital, Sichuan University, Sichuan, P. R. China
| | - Xiao-Yi Sun
- Department of Neurology, West China Hospital, Sichuan University, Sichuan, P. R. China
| | - Rong Peng
- Department of Neurology, West China Hospital, Sichuan University, Sichuan, P. R. China
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Mastrototaro L, Tietjen U, Sponder G, Vormann J, Aschenbach JR, Kolisek M. Insulin Modulates the Na+/Mg2+ Exchanger SLC41A1 and Influences Mg2+ Efflux from Intracellular Stores in Transgenic HEK293 Cells. J Nutr 2015; 145:2440-7. [PMID: 26355001 DOI: 10.3945/jn.115.213918] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Accepted: 08/07/2015] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Magnesium deficiency is a common complication of diabetes with an unclear molecular background. OBJECTIVE We investigated the effect of the insulin (INS)-signaling pathway (ISP) on the regulation of Mg(2+) efflux (Mg(2+)E) conducted by solute carrier family 41, member A1 (SLC41A1; activated by protein kinase A) in transgenic human embryonic kidney (HEK) 293 cells. METHODS HEK293 cells overexpressing SLC41A1 were loaded with the Mg(2+) fluorescent indicator mag-fura-2 and Mg(2+). Measurements of Mg(2+)E were conducted in Mg(2+)-free buffer by using fast-filter fluorescence spectrometry. We examined the effects of INS, inhibitors of ISP or p38 mitogen-activated protein kinase (p38 MAPK), an activator of adenylate cyclase (ADC), and their combinations on SLC41A1-attributed Mg(2+)E. RESULTS The application of 400 μU/mL INS inhibited SLC41A1-mediated Mg(2+)E by up to 50.6% compared with INS-untreated cells (P < 0.001). Moreover, INS evoked the early onset of Mg(2+) release from intracellular stores. The application of 0.1 μM wortmannin or 10 μM zardaverine (both ISP inhibitors) restored SLC41A1 Mg(2+)E capacity in the presence of INS to the same levels in INS-untreated cells. The simultaneous application of 10 μM forskolin, an ADC activator, and INS resulted in a reduction of Mg(2+)E of up to 59% compared with untreated cells (P < 0.001), which was comparable to that in cells treated with INS alone. Inhibition of p38 MAPK with 10 μM SB 202190 (SB) in the absence of INS resulted in a decrease (P < 0.001) of SLC41A1-dependent Mg(2+)E (by up to 49%) compared with Mg(2+)E measured in untreated cells. Simultaneous exposure of cells to SB and INS had a stronger inhibitory effect on SLC41A1 activity than INS alone (P < 0.05). CONCLUSIONS INS affects intracellular Mg(2+) concentration in transgenic HEK293 cells by regulating SLC41A1 activity (via ISP) and by influencing the compartmentalization and cellular distribution of Mg(2+). In addition, p38 MAPK activates SLC41A1 independently of INS action.
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Affiliation(s)
- Lucia Mastrototaro
- Institute of Veterinary Physiology, Freie Universität, Berlin, Germany; and
| | - Uwe Tietjen
- Institute of Veterinary Physiology, Freie Universität, Berlin, Germany; and
| | - Gerhard Sponder
- Institute of Veterinary Physiology, Freie Universität, Berlin, Germany; and
| | - Jürgen Vormann
- Institute for Prevention and Nutrition, Ismaning/Munich, Germany
| | - Jörg R Aschenbach
- Institute of Veterinary Physiology, Freie Universität, Berlin, Germany; and
| | - Martin Kolisek
- Institute of Veterinary Physiology, Freie Universität, Berlin, Germany; and
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PARK7/DJ-1 dysregulation by oxidative stress leads to magnesium deficiency: implications in degenerative and chronic diseases. Clin Sci (Lond) 2015; 129:1143-50. [PMID: 26453619 DOI: 10.1042/cs20150355] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2015] [Accepted: 09/25/2015] [Indexed: 11/17/2022]
Abstract
Disturbed magnesium (Mg(2+)) homoeostasis and increased levels of OS (oxidative stress) are associated with poor clinical outcomes in patients suffering from neurodegenerative, cardiovascular and metabolic diseases. Data from clinical and animal studies suggest that MD (Mg(2+) deficiency) is correlated with increased production of ROS (reactive oxygen species) in cells, but a straightforward causal relationship (including molecular mechanisms) between the two conditions is lacking. The multifactorial protein PARK7/DJ-1 is a major antioxidant protein, playing a key role in cellular redox homoeostasis, and is a positive regulator of AR (androgen receptor)-dependent transcription. SLC41A1 (solute carrier family 41 member 1), the gene encoding a ubiquitous cellular Mg(2+)E (Mg(2+)efflux) system, has been shown to be regulated by activated AR. We hypothesize that overexpression/up-regulation of PARK7/DJ-1, attributable to OS and related activation of AR, is an important event regulating the expression of SLC41A1 and consequently, modulating the Mg(2+)E capacity. This would involve changes in the transcriptional activity of PARK7/DJ-1, AR and SLC41A1, which may serve as biomarkers of intracellular MD and may have clinical relevance. Imipramine, in use as an antidepressant, has been shown to reduce the Mg(2+)E activity of SLC41A1 and OS. We therefore hypothesize further that administration of imipramine or related drugs will be beneficial in MD- and OS-associated diseases, especially when combined with Mg(2+) supplementation. If proved true, the OS-responsive functional axis, PARK7/DJ-1-AR-SLC41A1, may be a putative mechanism underlying intracellular MD secondary to OS caused by pro-oxidative stimuli, including extracellular MD. Furthermore, it will advance our understanding of the link between OS and MD.
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Ramirez A. Population-Based Genetic Studies: The Search for Causative Variants in Parkinson's Disease. Mov Disord 2015; 30:1297-300. [DOI: 10.1002/mds.26341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2015] [Revised: 06/08/2015] [Accepted: 06/13/2015] [Indexed: 11/08/2022] Open
Affiliation(s)
- Alfredo Ramirez
- Department of Psychiatry and Psychotherapy; University of Bonn; Bonn Germany
- Institute of Human Genetics, University of Bonn; Bonn Germany
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Shindo Y, Yamanaka R, Suzuki K, Hotta K, Oka K. Intracellular magnesium level determines cell viability in the MPP(+) model of Parkinson's disease. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2015; 1853:3182-91. [PMID: 26319097 DOI: 10.1016/j.bbamcr.2015.08.013] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 04/20/2015] [Revised: 07/24/2015] [Accepted: 08/22/2015] [Indexed: 12/14/2022]
Abstract
Parkinson's disease (PD) is a neurodegenerative disorder resulting from mitochondrial dysfunction in dopaminergic neurons. Mitochondria are believed to be responsible for cellular Mg²⁺ homeostasis. Mg²⁺ is indispensable for maintaining ordinal cellular functions, hence perturbation of the cellular Mg²⁺ homeostasis may be responsible for the disorders of physiological functions and diseases including PD. However, the changes in intracellular Mg²⁺ concentration ([Mg²⁺]i) and the role of Mg²⁺ in PD have still been obscure. In this study, we investigated [Mg²⁺]i and its effect on neurodegeneration in the 1-methyl-4-phenylpyridinium (MPP⁺) model of PD in differentiated PC12 cells. Application of MPP⁺ induced an increase in [Mg²⁺]i immediately via two different pathways: Mg²⁺ release from mitochondria and Mg²⁺ influx across cell membrane, and the increased [Mg²⁺]i sustained for more than 16 h after MPP⁺ application. Suppression of Mg²⁺ influx decreased the viability of the cells exposed to MPP⁺. The cell viability correlated highly with [Mg²⁺]i. In the PC12 cells with suppressed Mg²⁺ influx, ATP concentration decreased and the amount of reactive oxygen species (ROS) increased after an 8h exposure to MPP⁺. Our results indicate that the increase in [Mg²⁺]i inhibited cellular ROS generation and maintained ATP production, which resulted in the protection from MPP⁺ toxicity.
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Affiliation(s)
- Yutaka Shindo
- Department of Bioscience and Informatics, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
| | - Ryu Yamanaka
- Department of Bioscience and Informatics, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
| | - Koji Suzuki
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
| | - Kohji Hotta
- Department of Bioscience and Informatics, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
| | - Kotaro Oka
- Department of Bioscience and Informatics, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan.
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Venco P, Bonora M, Giorgi C, Papaleo E, Iuso A, Prokisch H, Pinton P, Tiranti V. Mutations of C19orf12, coding for a transmembrane glycine zipper containing mitochondrial protein, cause mis-localization of the protein, inability to respond to oxidative stress and increased mitochondrial Ca²⁺. Front Genet 2015; 6:185. [PMID: 26136767 PMCID: PMC4470416 DOI: 10.3389/fgene.2015.00185] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2015] [Accepted: 05/03/2015] [Indexed: 01/18/2023] Open
Abstract
Mutations in C19orf12 have been identified in patients affected by Neurodegeneration with Brain Iron Accumulation (NBIA), a clinical entity characterized by iron accumulation in the basal ganglia. By using western blot analysis with specific antibody and confocal studies, we showed that wild-type C19orf12 protein was not exclusively present in mitochondria, but also in the Endoplasmic Reticulum (ER) and MAM (Mitochondria Associated Membrane), while mutant C19orf12 variants presented a different localization. Moreover, after induction of oxidative stress, a GFP-tagged C19orf12 wild-type protein was able to relocate to the cytosol. On the contrary, mutant isoforms were not able to respond to oxidative stress. High mitochondrial calcium concentration and increased H2O2 induced apoptosis were found in fibroblasts derived from one patient as compared to controls. C19orf12 protein is a 17 kDa mitochondrial membrane-associated protein whose function is still unknown. Our in silico investigation suggests that, the glycine zipper motifs of C19orf12 form helical regions spanning the membrane. The N- and C-terminal regions with respect to the transmembrane portion, on the contrary, are predicted to rearrange in a structural domain, which is homologs to the N-terminal regulatory domain of the magnesium transporter MgtE, suggesting that C19orf12 may act as a regulatory protein for human MgtE transporters. The mutations here described affect respectively one glycine residue of the glycine zipper motifs, which are involved in dimerization of transmembrane helices and predicted to impair the correct localization of the protein into the membranes, and one residue present in the regulatory domain, which is important for protein-protein interaction.
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Affiliation(s)
- Paola Venco
- Unit of Molecular Neurogenetics - Pierfranco and Luisa Mariani Center for the study of Mitochondrial Disorders in Children, IRCCS Foundation Neurological Institute "C. Besta" Milan, Italy
| | - Massimo Bonora
- Section of Pathology, Oncology and Experimental Biology and Laboratory for Technologies of Advanced Therapies Center, Department of Morphology, Surgery and Experimental Medicine, University of Ferrara Ferrara, Italy
| | - Carlotta Giorgi
- Section of Pathology, Oncology and Experimental Biology and Laboratory for Technologies of Advanced Therapies Center, Department of Morphology, Surgery and Experimental Medicine, University of Ferrara Ferrara, Italy
| | - Elena Papaleo
- Structural Biology and NMR Laboratory, Department of Biology, University of Copenhagen Copenhagen, Denmark
| | - Arcangela Iuso
- Institute of Human Genetics, Klinikum rechts der Isar, Technische Universität München Munich, Germany ; Institute of Human Genetics, Helmholtz Zentrum München Munich, Germany
| | - Holger Prokisch
- Institute of Human Genetics, Klinikum rechts der Isar, Technische Universität München Munich, Germany ; Institute of Human Genetics, Helmholtz Zentrum München Munich, Germany
| | - Paolo Pinton
- Section of Pathology, Oncology and Experimental Biology and Laboratory for Technologies of Advanced Therapies Center, Department of Morphology, Surgery and Experimental Medicine, University of Ferrara Ferrara, Italy
| | - Valeria Tiranti
- Unit of Molecular Neurogenetics - Pierfranco and Luisa Mariani Center for the study of Mitochondrial Disorders in Children, IRCCS Foundation Neurological Institute "C. Besta" Milan, Italy
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Pihlstrøm L, Rengmark A, Bjørnarå KA, Dizdar N, Fardell C, Forsgren L, Holmberg B, Larsen JP, Linder J, Nissbrandt H, Tysnes OB, Dietrichs E, Toft M. Fine mapping and resequencing of the PARK16 locus in Parkinson’s disease. J Hum Genet 2015; 60:357-62. [DOI: 10.1038/jhg.2015.34] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2014] [Revised: 03/01/2015] [Accepted: 03/06/2015] [Indexed: 02/04/2023]
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de Baaij JHF, Hoenderop JGJ, Bindels RJM. Magnesium in man: implications for health and disease. Physiol Rev 2015; 95:1-46. [PMID: 25540137 DOI: 10.1152/physrev.00012.2014] [Citation(s) in RCA: 886] [Impact Index Per Article: 98.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Magnesium (Mg(2+)) is an essential ion to the human body, playing an instrumental role in supporting and sustaining health and life. As the second most abundant intracellular cation after potassium, it is involved in over 600 enzymatic reactions including energy metabolism and protein synthesis. Although Mg(2+) availability has been proven to be disturbed during several clinical situations, serum Mg(2+) values are not generally determined in patients. This review aims to provide an overview of the function of Mg(2+) in human health and disease. In short, Mg(2+) plays an important physiological role particularly in the brain, heart, and skeletal muscles. Moreover, Mg(2+) supplementation has been shown to be beneficial in treatment of, among others, preeclampsia, migraine, depression, coronary artery disease, and asthma. Over the last decade, several hereditary forms of hypomagnesemia have been deciphered, including mutations in transient receptor potential melastatin type 6 (TRPM6), claudin 16, and cyclin M2 (CNNM2). Recently, mutations in Mg(2+) transporter 1 (MagT1) were linked to T-cell deficiency underlining the important role of Mg(2+) in cell viability. Moreover, hypomagnesemia can be the consequence of the use of certain types of drugs, such as diuretics, epidermal growth factor receptor inhibitors, calcineurin inhibitors, and proton pump inhibitors. This review provides an extensive and comprehensive overview of Mg(2+) research over the last few decades, focusing on the regulation of Mg(2+) homeostasis in the intestine, kidney, and bone and disturbances which may result in hypomagnesemia.
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Affiliation(s)
- Jeroen H F de Baaij
- Department of Physiology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Joost G J Hoenderop
- Department of Physiology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - René J M Bindels
- Department of Physiology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
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