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Nicoli ER, Huebecker M, Han ST, Garcia K, Munasinghe J, Lizak M, Latour Y, Yoon R, Glase B, Tyrlik M, Peiravi M, Springer D, Baker EH, Priestman D, Sidhu R, Kell P, Jiang X, Kolstad J, Kuhn AL, Shazeeb MS, Acosta MT, Proia RL, Platt FM, Tifft CJ. Glb1 knockout mouse model shares natural history with type II GM1 gangliosidosis patients. Mol Genet Metab 2023; 138:107508. [PMID: 36709532 PMCID: PMC10617618 DOI: 10.1016/j.ymgme.2023.107508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 01/09/2023] [Accepted: 01/10/2023] [Indexed: 01/15/2023]
Abstract
GM1 gangliosidosis is a rare lysosomal storage disorder affecting multiple organ systems, primarily the central nervous system, and is caused by functional deficiency of β-galactosidase (GLB1). Using CRISPR/Cas9 genome editing, we generated a mouse model to evaluate characteristics of the disease in comparison to GM1 gangliosidosis patients. Our Glb1-/- mice contain small deletions in exons 2 and 6, producing a null allele. Longevity is approximately 50 weeks and studies demonstrated that female Glb1-/- mice die six weeks earlier than male Glb1-/- mice. Gait analyses showed progressive abnormalities including abnormal foot placement, decreased stride length and increased stance width, comparable with what is observed in type II GM1 gangliosidosis patients. Furthermore, Glb1-/- mice show loss of motor skills by 20 weeks assessed by adhesive dot, hanging wire, and inverted grid tests, and deterioration of motor coordination by 32 weeks of age when evaluated by rotarod testing. Brain MRI showed progressive cerebellar atrophy in Glb1-/- mice as seen in some patients. In addition, Glb1-/- mice also show significantly increased levels of a novel pentasaccharide biomarker in urine and plasma which we also observed in GM1 gangliosidosis patients. Glb1-/- mice also exhibit accumulation of glycosphingolipids in the brain with increases in GM1 and GA1 beginning by 8 weeks. Surprisingly, despite being a null variant, this Glb1-/- mouse most closely models the less severe type II disease and will guide the development of new therapies for patients with the disorder.
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Affiliation(s)
- Elena-Raluca Nicoli
- Glycosphingolipid and Glycoprotein Disorders Unit, Medical Genetic Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, United States
| | - Mylene Huebecker
- Department of Pharmacology, University of Oxford, Oxford, United Kingdom
| | - Sangwoo T Han
- Glycosphingolipid and Glycoprotein Disorders Unit, Medical Genetic Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, United States
| | - Karolyn Garcia
- Glycosphingolipid and Glycoprotein Disorders Unit, Medical Genetic Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, United States
| | - Jeeva Munasinghe
- Mouse Imaging Facility, National Institute of Neurological Disorder and Stroke, National Institutes of Health, Bethesda, MD, United States
| | - Martin Lizak
- Mouse Imaging Facility, National Institute of Neurological Disorder and Stroke, National Institutes of Health, Bethesda, MD, United States
| | - Yvonne Latour
- Glycosphingolipid and Glycoprotein Disorders Unit, Medical Genetic Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, United States
| | - Robin Yoon
- Glycosphingolipid and Glycoprotein Disorders Unit, Medical Genetic Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, United States
| | - Brianna Glase
- Glycosphingolipid and Glycoprotein Disorders Unit, Medical Genetic Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, United States
| | - Michal Tyrlik
- Glycosphingolipid and Glycoprotein Disorders Unit, Medical Genetic Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, United States; Phenotyping Core (D.A.S.), National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, United States
| | - Morteza Peiravi
- Phenotyping Core (D.A.S.), National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, United States
| | - Danielle Springer
- Phenotyping Core (D.A.S.), National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, United States
| | - Eva H Baker
- Department of Radiology and Imaging Sciences, Clinical Center, National Institutes of Health, Bethesda, MD, United States
| | - David Priestman
- Department of Pharmacology, University of Oxford, Oxford, United Kingdom
| | - Rohini Sidhu
- Department of Medicine, Washington University School of Medicine, Saint Louis, MO, United States
| | - Pamela Kell
- Department of Medicine, Washington University School of Medicine, Saint Louis, MO, United States
| | - Xuntian Jiang
- Department of Medicine, Washington University School of Medicine, Saint Louis, MO, United States
| | - Josephine Kolstad
- Image Processing and Analysis Core (iPAC), Department of Radiology, UMass Chan Medical School, Worcester, MA, United States
| | - Anna Luisa Kuhn
- Image Processing and Analysis Core (iPAC), Department of Radiology, UMass Chan Medical School, Worcester, MA, United States
| | - Mohammed Salman Shazeeb
- Image Processing and Analysis Core (iPAC), Department of Radiology, UMass Chan Medical School, Worcester, MA, United States
| | - Maria T Acosta
- Undiagnosed Diseases Program, Common Fund, Office of the Director, National Institutes of Health, Bethesda, MD, United States
| | - Richard L Proia
- Genetics and Biochemistry Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, United States
| | - Frances M Platt
- Department of Pharmacology, University of Oxford, Oxford, United Kingdom
| | - Cynthia J Tifft
- Glycosphingolipid and Glycoprotein Disorders Unit, Medical Genetic Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, United States; Undiagnosed Diseases Program, Common Fund, Office of the Director, National Institutes of Health, Bethesda, MD, United States.
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2
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Gao JL, Weaver JD, Tuo J, Wang LQ, Siwicki M, Despres D, Lizak M, Schneider EH, Kovacs W, Maminishkis A, Chen K, Yoshimura T, Ming Wang J, Chao Chan C, Murphy PM. Leukocyte chemotactic receptor Fpr1 protects against aging-related posterior subcapsular cataract formation. FASEB J 2021; 35:e21315. [PMID: 33538366 PMCID: PMC11005932 DOI: 10.1096/fj.202002135r] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Revised: 12/11/2020] [Accepted: 12/14/2020] [Indexed: 11/11/2022]
Abstract
Cataracts are a common consequence of aging; however, pathogenesis remains poorly understood. Here, we observed that after 3 months of age mice lacking the G protein-coupled leukocyte chemotactic receptor Fpr1 (N-formyl peptide receptor 1) began to develop bilateral posterior subcapsular cataracts that progressed to lens rupture and severe degeneration, without evidence of either systemic or local ocular infection or inflammation. Consistent with this, Fpr1 was detected in both mouse and human lens in primary lens epithelial cells (LECs), the only cell type present in the lens; however, expression was confined to subcapsular LECs located along the anterior hemispheric surface. To maximize translucency, LECs at the equator proliferate and migrate posteriorly, then differentiate into lens fiber cells by nonclassical apoptotic signaling, which results in loss of nuclei and other organelles, including mitochondria which are a rich source of endogenous N-formyl peptides. In this regard, denucleation and posterior migration of LECs were abnormal in lenses from Fpr1-/- mice, and direct stimulation of LECs with the prototypic N-formyl peptide agonist fMLF promoted apoptosis. Thus, Fpr1 is repurposed beyond its immunoregulatory role in leukocytes to protect against cataract formation and lens degeneration during aging.
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Affiliation(s)
- Ji-Liang Gao
- Molecular Signaling Section, Laboratory of Molecular Immunology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892
| | - Joseph D. Weaver
- Molecular Signaling Section, Laboratory of Molecular Immunology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892
| | - Jingsheng Tuo
- Laboratory of Immunology, National Eye Institute, National Institutes of Health, Bethesda, MD 20892
| | - Long Q. Wang
- Molecular Signaling Section, Laboratory of Molecular Immunology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892
| | - Marie Siwicki
- Molecular Signaling Section, Laboratory of Molecular Immunology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892
| | - Daryl Despres
- Mouse Imaging Facility, National Institutes of Health, Bethesda, MD 20892
| | - Martin Lizak
- Mouse Imaging Facility, National Institutes of Health, Bethesda, MD 20892
| | - Erich H. Schneider
- Molecular Signaling Section, Laboratory of Molecular Immunology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892
| | - William Kovacs
- Molecular Signaling Section, Laboratory of Molecular Immunology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892
| | - Arvydas Maminishkis
- Section on Epithelial and Retinal Physiology and Disease, National Eye Institute, National Institutes of Health, Bethesda, MD 20892
| | - Keqiang Chen
- Laboratory of Cancer and ImmunoMetabolism, Center for Cancer Research, National Cancer Institute at Frederick, Frederick, MD 21702
| | - Teizo Yoshimura
- Department of Pathology and Experimental Medicine, Okayama University, Okayama 700-8558, Japan
| | - Ji Ming Wang
- Laboratory of Cancer and ImmunoMetabolism, Center for Cancer Research, National Cancer Institute at Frederick, Frederick, MD 21702
| | - Chi Chao Chan
- Laboratory of Immunology, National Eye Institute, National Institutes of Health, Bethesda, MD 20892
| | - Philip M. Murphy
- Molecular Signaling Section, Laboratory of Molecular Immunology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892
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3
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Buxbaum NP, Farthing DE, Maglakelidze N, Lizak M, Merkle H, Carpenter AC, Oliver BU, Kapoor V, Castro E, Swan GA, Dos Santos LM, Bouladoux NJ, Bare CV, Flomerfelt FA, Eckhaus MA, Telford WG, Belkaid Y, Bosselut RJ, Gress RE. In vivo kinetics and nonradioactive imaging of rapidly proliferating cells in graft-versus-host disease. JCI Insight 2017; 2:92851. [PMID: 28614804 DOI: 10.1172/jci.insight.92851] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Accepted: 05/16/2017] [Indexed: 12/25/2022] Open
Abstract
Hematopoietic stem cell transplantation (HSCT) offers a cure for cancers that are refractory to chemotherapy and radiation. Most HSCT recipients develop chronic graft-versus-host disease (cGVHD), a systemic alloimmune attack on host organs. Diagnosis is based on clinical signs and symptoms, as biopsies are risky. T cells are central to the biology of cGVHD. We found that a low Treg/CD4+ T effector memory (Tem) ratio in circulation, lymphoid, and target organs identified early and established mouse cGVHD. Using deuterated water labeling to measure multicompartment in vivo kinetics of these subsets, we show robust Tem and Treg proliferation in lymphoid and target organs, while Tregs undergo apoptosis in target organs. Since deuterium enrichment into DNA serves as a proxy for cell proliferation, we developed a whole-body clinically relevant deuterium MRI approach to nonradioactively detect cGVHD and potentially allow imaging of other diseases characterized by rapidly proliferating cells.
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Affiliation(s)
- Nataliya P Buxbaum
- Experimental Transplantation and Immunology Branch, National Cancer Institute
| | - Donald E Farthing
- Experimental Transplantation and Immunology Branch, National Cancer Institute
| | | | - Martin Lizak
- In Vivo NMR Center, National Institute of Neurological Disorders and Stroke
| | - Hellmut Merkle
- Laboratory of Functional and Molecular Imaging, National Institute of Neurological Disorders and Stroke
| | | | - Brittany U Oliver
- Experimental Transplantation and Immunology Branch, National Cancer Institute
| | - Veena Kapoor
- Experimental Transplantation and Immunology Branch, National Cancer Institute
| | - Ehydel Castro
- Experimental Transplantation and Immunology Branch, National Cancer Institute
| | - Gregory A Swan
- Experimental Transplantation and Immunology Branch, National Cancer Institute
| | - Liliane M Dos Santos
- Mucosal Immunology Section, National Institute of Allergy and Infectious Diseases, and
| | - Nicolas J Bouladoux
- Mucosal Immunology Section, National Institute of Allergy and Infectious Diseases, and
| | - Catherine V Bare
- Experimental Transplantation and Immunology Branch, National Cancer Institute
| | | | - Michael A Eckhaus
- Diagnostic and Research Services Branch, Office of the Director, NIH, Bethesda, Maryland, USA
| | - William G Telford
- Experimental Transplantation and Immunology Branch, National Cancer Institute
| | - Yasmine Belkaid
- Mucosal Immunology Section, National Institute of Allergy and Infectious Diseases, and
| | - Remy J Bosselut
- Laboratory of Immune Cell Biology, National Cancer Institute
| | - Ronald E Gress
- Experimental Transplantation and Immunology Branch, National Cancer Institute
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4
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Buxbaum NP, Maglakelidze N, Farthing DE, Lizak M, Merkle H, Oliver BU, Castro E, Koretsky AP, Gress RE. Deuterated Water Labeling Followed By Deuterium MRI Facilitates In Vivo Imaging of Chronic Gvhd. Biol Blood Marrow Transplant 2017. [DOI: 10.1016/j.bbmt.2016.12.308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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5
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Mukhopadhyay B, Schuebel K, Mukhopadhyay P, Cinar R, Godlewski G, Xiong K, Mackie K, Lizak M, Yuan Q, Goldman D, Kunos G. Cannabinoid receptor 1 promotes hepatocellular carcinoma initiation and progression through multiple mechanisms. Hepatology 2015; 61:1615-26. [PMID: 25580584 PMCID: PMC4406817 DOI: 10.1002/hep.27686] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/01/2014] [Accepted: 12/25/2014] [Indexed: 01/09/2023]
Abstract
UNLABELLED Hepatocellular carcinoma (HCC) has high mortality and no adequate treatment. Endocannabinoids interact with hepatic cannabinoid 1 receptors (CB1Rs) to promote hepatocyte proliferation in liver regeneration by inducing cell cycle proteins involved in mitotic progression, including Forkhead Box M1. Because this protein is highly expressed in HCC and contributes to its genesis and progression, we analyzed the involvement of the endocannabinoid/CB1R system in murine and human HCC. Postnatal diethylnitrosamine treatment induced HCC within 8 months in wild-type mice but fewer and smaller tumors in CB1R(-/-) mice or in wild-type mice treated with the peripheral CB1R antagonist JD5037, as monitored in vivo by serial magnetic resonance imaging. Genome-wide transcriptome analysis revealed CB1R-dependent, tumor-induced up-regulation of the hepatic expression of CB1R, its endogenous ligand anandamide, and a number of tumor-promoting genes, including the GRB2 interactome as well as Forkhead Box M1 and its downstream target, the tryptophan-catalyzing enzyme indoleamine 2,3-dioxygenase. Increased indoleamine 2,3-dioxygenase activity and consequent induction of immunosuppressive T-regulatory cells in tumor tissue promote immune tolerance. CONCLUSION The endocannabinoid/CB1R system is up-regulated in chemically induced HCC, resulting in the induction of various tumor-promoting genes, including indoleamine 2,3-dioxygenase; and attenuation of these changes by blockade or genetic ablation of CB1R suppresses the growth of HCC and highlights the therapeutic potential of peripheral CB1R blockade.
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Affiliation(s)
- Bani Mukhopadhyay
- Laboratory of Physiologic Studies, National Institute on Alcohol Abuse and Alcoholism, NIH, Bethesda, MD 20892, USA
| | - Kornel Schuebel
- Laboratory of Neurogenetics, National Institute on Alcohol Abuse and Alcoholism, NIH, Bethesda, MD 20892, USA
| | - Partha Mukhopadhyay
- Laboratory of Physiologic Studies, National Institute on Alcohol Abuse and Alcoholism, NIH, Bethesda, MD 20892, USA
| | - Resat Cinar
- Laboratory of Physiologic Studies, National Institute on Alcohol Abuse and Alcoholism, NIH, Bethesda, MD 20892, USA
| | - Grzegorz Godlewski
- Laboratory of Physiologic Studies, National Institute on Alcohol Abuse and Alcoholism, NIH, Bethesda, MD 20892, USA
| | - Keming Xiong
- Laboratory of Physiologic Studies, National Institute on Alcohol Abuse and Alcoholism, NIH, Bethesda, MD 20892, USA
| | - Ken Mackie
- Gill Center for Biomolecular Science, Indiana University, Bloomington, Indiana 47405, USA
| | - Martin Lizak
- In Vivo NMR Center, National Institute on Neurological Diseases and Stroke, NIH, Bethesda, MD 20892, USA
| | - Qiaoping Yuan
- Laboratory of Neurogenetics, National Institute on Alcohol Abuse and Alcoholism, NIH, Bethesda, MD 20892, USA
| | - David Goldman
- Laboratory of Neurogenetics, National Institute on Alcohol Abuse and Alcoholism, NIH, Bethesda, MD 20892, USA
| | - George Kunos
- Laboratory of Physiologic Studies, National Institute on Alcohol Abuse and Alcoholism, NIH, Bethesda, MD 20892, USA
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Matsumoto S, Saito K, Yasui H, Morris HD, Munasinghe JP, Lizak M, Merkle H, Ardenkjaer-Larsen JH, Choudhuri R, Devasahayam N, Subramanian S, Koretsky AP, Mitchell JB, Krishna MC. EPR oxygen imaging and hyperpolarized 13
C MRI of pyruvate metabolism as noninvasive biomarkers of tumor treatment response to a glycolysis inhibitor 3-bromopyruvate. Magn Reson Med 2013. [DOI: 10.1002/mrm.24787] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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7
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Matsumoto S, Saito K, Yasui H, Morris HD, Munasinghe JP, Lizak M, Merkle H, Ardenkjaer-Larsen JH, Choudhuri R, Devasahayam N, Subramanian S, Koretsky AP, Mitchell JB, Krishna MC. EPR oxygen imaging and hyperpolarized 13C MRI of pyruvate metabolism as noninvasive biomarkers of tumor treatment response to a glycolysis inhibitor 3-bromopyruvate. Magn Reson Med 2012; 69:1443-50. [PMID: 22692861 DOI: 10.1002/mrm.24355] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2012] [Revised: 05/07/2012] [Accepted: 05/08/2012] [Indexed: 12/15/2022]
Abstract
The hypoxic nature of tumors results in treatment resistance and poor prognosis. To spare limited oxygen for more crucial pathways, hypoxic cancerous cells suppress mitochondrial oxidative phosphorylation and promote glycolysis for energy production. Thereby, inhibition of glycolysis has the potential to overcome treatment resistance of hypoxic tumors. Here, EPR imaging was used to evaluate oxygen dependent efficacy on hypoxia-sensitive drug. The small molecule 3-bromopyruvate blocks glycolysis pathway by inhibiting hypoxia inducible enzymes and enhanced cytotoxicity of 3-bromopyruvate under hypoxic conditions has been reported in vitro. However, the efficacy of 3-bromopyruvate was substantially attenuated in hypoxic tumor regions (pO2<10 mmHg) in vivo using squamous cell carcinoma (SCCVII)-bearing mouse model. Metabolic MRI studies using hyperpolarized 13C-labeled pyruvate showed that monocarboxylate transporter-1 is the major transporter for pyruvate and the analog 3-bromopyruvate in SCCVII tumor. The discrepant results between in vitro and in vivo data were attributed to biphasic oxygen dependent expression of monocarboxylate transporter-1 in vivo. Expression of monocarboxylate transporter-1 was enhanced in moderately hypoxic (8-15 mmHg) tumor regions but down regulated in severely hypoxic (<5 mmHg) tumor regions. These results emphasize the importance of noninvasive imaging biomarkers to confirm the action of hypoxia-activated drugs.
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Affiliation(s)
- Shingo Matsumoto
- Radiation Biology Branch, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, Maryland 20892-1002, USA
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Lem KE, Brinster LR, Tjurmina O, Lizak M, Lal S, Centeno JA, Liu PC, Godwin SC, Kaler SG. Safety of intracerebroventricular copper histidine in adult rats. Mol Genet Metab 2007; 91:30-6. [PMID: 17336116 PMCID: PMC2570033 DOI: 10.1016/j.ymgme.2007.01.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/31/2006] [Accepted: 01/01/2007] [Indexed: 11/22/2022]
Abstract
Classical Menkes disease is an X-linked recessive neurodegenerative disorder caused by mutations in a P-type ATPase (ATP7A) that normally delivers copper to the developing central nervous system. Infants with large deletions, or other mutations in ATP7A that incapacitate copper transport to the brain, show poor clinical outcomes and subnormal brain copper despite early subcutaneous copper histidine (CuHis) injections. These findings suggest a need for direct central nervous system approaches in such patients. To begin to evaluate an aggressive but potentially useful new strategy for metabolic improvement of this disorder, we studied the acute and chronic effects of CuHis administered by intracerebroventricular (ICV) injection in healthy adult rats. Magnetic resonance imaging (MRI) after ICV CuHis showed diffuse T(1)-signal enhancement, indicating wide brain distribution of copper after ICV administration, and implying the utility of this paramagnetic metal as a MRI contrast agent. The maximum tolerated dose (MTD) of CuHis, defined as the highest dose that did not induce overt toxicity, growth retardation, or reduce lifespan, was 0.5mcg. Animals receiving multiple infusions of this MTD showed increased brain copper concentrations, but no significant differences in activity, behavior, and somatic growth, or brain histology compared to saline-injected controls. Based on estimates of the brain copper deficit in Menkes disease patients, CuHis doses 10-fold lower than the MTD found in this study may restore proper brain copper concentration. Our results suggest that ICV CuHis administration have potential as a novel treatment approach in Menkes disease infants with severe mutations. Future trials of direct CNS copper administration in mouse models of Menkes disease will be informative.
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Affiliation(s)
- Kristen E Lem
- Unit on Pediatric Genetics, Laboratory of Clinical Genomics, National Institute of Child Health and Human Development, Bethesda, MD, USA
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9
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Li S, Chen Z, Zhang Y, Lizak M, Bacher J, Innis RB, Shen J. In vivo single-shot, proton-localized 13C MRS of rhesus monkey brain. NMR Biomed 2005; 18:560-9. [PMID: 16273509 DOI: 10.1002/nbm.993] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
A single-shot, proton-localized, polarization transfer (13)C spectroscopic method was proposed and implemented on a 4.7 T scanner for studying rhesus monkey brains. The polarization transfer sequence was mostly adiabatic, minimizing signal loss due to B(1) inhomogeneity. RF pulses in polarization transfer were also used for voxel selection of protons with gradient fields. The transferred (13)C magnetization was refocused by additional refocusing adiabatic pulses. With the intravenous infusion of D-[1-(13)C]glucose solution, (13)C NMR spectra from a 30 mL voxel were acquired for the resonances of C1 of glucose, C2,3,4 of glutamate and glutamine. The time-resolved turnover of glutamate, glutamine and aspartate from intravenously infused D-[1-(13)C]glucose at a temporal resolution of 12 min was demonstrated with excellent spectral resolution and signal-to-noise ratio. Typically, the half-height linewidth of the decoupled (13)C peaks was approximately 4 Hz. Data obtained with infusion of sodium [2-(13)C]acetate using the proposed polarization transfer method and data from the carboxylic carbon region using non-localized acquisition are also presented.
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Affiliation(s)
- Shizhe Li
- National Institute of Mental Health, National Institutes of Health, Bethesda, MD 20892, USA
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Abstract
BACKGROUND Determining the disease culprits in human acute renal failure (ARF) has been difficult because of the paucity of renal biopsies and the lack of noninvasive methods to determine the location or cause of renal injury. Recently, ultrasmall superparamagnetic iron oxide (USPIO) particles have been used to detect inflammation in animal models. Therefore, we tested if USPIO enhanced magnetic resonance imaging (MRI) could detect inflammation in ischemic ARF in rats. METHODS Rats were subjected to 40 or 60 minutes of bilateral ischemia or injected with mercuric chloride. MR images were obtained before and 24 hours after USPIO injection, and the signal intensity decrease in the outer medulla was measured. Cells containing iron particles were identified by iron staining and transmission electron microscopy (TEM). Leukocytes were identified by ED-1 and chloracetate esterase staining. RESULTS Injection of USPIO particles caused a black band to appear in the outer medulla at 48, 72, and 120 hours after ischemia. This band was not detected in normal animals, 24 hours after ischemia, or 48 hours after mercuric chloride injection. The signal intensity change in the outer medulla correlated with serum creatinine and the number of iron particle containing cells. Most infiltrating cells were macrophages, and iron particles were present inside lysosomes of macrophages. USPIO injection did not alter renal function in normal or ischemic animals. CONCLUSION USPIO-enhanced MRI could detect inflammation noninvasively from 48 hours after 40 or 60 minutes of renal ischemia in rats. This method might be useful to understand the pathogenesis of human ARF and to evaluate the effectiveness of anti-inflammatory agents.
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Affiliation(s)
- Sang-Kyung Jo
- Renal Diagnostics and Therapeutics Unit, National Institutes of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland 20892, USA
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11
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Epstein JS, Ganz WI, Lizak M, Grobman L, Goodwin WJ, Dewanjee MK. Indium 111-labeled leukocyte scintigraphy in evaluating head and neck infections. Ann Otol Rhinol Laryngol 1992; 101:961-8. [PMID: 1463295 DOI: 10.1177/000348949210101201] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
This retrospective study looked at the role of indium 111-labeled white blood cell (111In WBC) scintigraphy in head and neck infections. The efficacy of 111In WBCs was compared to gallium 67 citrate (67Ga) and technetium Tc99m methylene diphosphonate (99mTc MDP) scintigraphy in detecting and monitoring the resolution of infection. For 22 active infections, the sensitivities for 111In WBC, 67Ga, and 99mTc MDP scintigraphy were 94%, 56%, and 86%, respectively, and the specificities for 111In WBC, 67Ga, and 99mTc MDP scintigraphy were 100%, 43%, and 0%, respectively. For 8 successfully treated infections, all seven 111In WBC studies became negative after therapy, in as short an interval as 1 month. In contrast, all seven 99mTc MDP images remained positive for as long as 6 months after therapy. The seven 67Ga studies had variable results, with four (57%) remaining positive, including two (28%) positive at 6 months after therapy. These results suggest that 111In WBC scintigraphy should be the initial radionuclide imaging tool in detecting active head and neck infections because of its greater accuracy, and its ability to revert to normal much sooner than 67Ga or 99mTc MDP scintigraphs when applied to a subset of patients with resolved infections.
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Affiliation(s)
- J S Epstein
- Department of Otolaryngology-Head and Neck Surgery, University of Miami, Florida
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12
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Patete ML, Casiano RR, Lizak M. Squamous cell carcinoma of the neck presenting as a chyle-filled pseudocyst. Ear Nose Throat J 1991; 70:527-30. [PMID: 1935720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
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