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Wang X, Wu X, Wu H, Xiao H, Hao S, Wang B, Li C, Bleymehl K, Kauschke SG, Mack V, Ferger B, Klein H, Zheng R, Duan S, Wang H. Neural adaption in midbrain GABAergic cells contributes to high-fat diet-induced obesity. Sci Adv 2023; 9:eadh2884. [PMID: 37910621 PMCID: PMC10619925 DOI: 10.1126/sciadv.adh2884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Accepted: 09/29/2023] [Indexed: 11/03/2023]
Abstract
Overeating disorders largely contribute to worldwide incidences of obesity. Available treatments are limited. Here, we discovered that long-term chemogenetic activation of ventrolateral periaqueductal gray (vlPAG) GABAergic cells rescue obesity of high-fat diet-induced obesity (DIO) mice. This was associated with the recovery of enhanced mIPSCs, decreased food intake, increased energy expenditure, and inguinal white adipose tissue (iWAT) browning. In vivo calcium imaging confirmed vlPAG GABAergic suppression for DIO mice, with corresponding reduction in intrinsic excitability. Single-nucleus RNA sequencing identified transcriptional expression changes in GABAergic cell subtypes in DIO mice, highlighting Cacna2d1 as of potential importance. Overexpressing CACNA2D1 in vlPAG GABAergic cells of DIO mice rescued enhanced mIPSCs and calcium response, reversed obesity, and therefore presented here as a potential target for obesity treatment.
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Affiliation(s)
- Xiaomeng Wang
- Department of Neurosurgery of Second Affiliated Hospital and School of Brain Science and Brain Medicine, Key Laboratory for Biomedical Engineering of Education Ministry, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310058, China
- Nanhu Brain-computer Interface Institute, Hangzhou 311100, China
- NHC and CAMS Key Laboratory of Medical Neurobiology, MOE Frontier Science Center for Brain Research and Brain Machine Integration, Key Laboratory of Precise Treatment and Clinical Translational Research of Neurological Diseases, School of Brain Science and Brain Medicine, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Xiaotong Wu
- Department of Neurosurgery of Second Affiliated Hospital and School of Brain Science and Brain Medicine, Key Laboratory for Biomedical Engineering of Education Ministry, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310058, China
- NHC and CAMS Key Laboratory of Medical Neurobiology, MOE Frontier Science Center for Brain Research and Brain Machine Integration, Key Laboratory of Precise Treatment and Clinical Translational Research of Neurological Diseases, School of Brain Science and Brain Medicine, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Hao Wu
- Institute of Hematology, Zhejiang University, Hangzhou, Zhejiang, 310058, China
- Zhejiang Laboratory for Systems and Precision Medicine, Zhejiang University Medical Center, Hangzhou, Zhejiang 310058, China
| | - Hanyang Xiao
- Department of Neurosurgery of Second Affiliated Hospital and School of Brain Science and Brain Medicine, Key Laboratory for Biomedical Engineering of Education Ministry, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310058, China
- NHC and CAMS Key Laboratory of Medical Neurobiology, MOE Frontier Science Center for Brain Research and Brain Machine Integration, Key Laboratory of Precise Treatment and Clinical Translational Research of Neurological Diseases, School of Brain Science and Brain Medicine, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Sijia Hao
- Department of Neurosurgery of Second Affiliated Hospital and School of Brain Science and Brain Medicine, Key Laboratory for Biomedical Engineering of Education Ministry, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310058, China
- NHC and CAMS Key Laboratory of Medical Neurobiology, MOE Frontier Science Center for Brain Research and Brain Machine Integration, Key Laboratory of Precise Treatment and Clinical Translational Research of Neurological Diseases, School of Brain Science and Brain Medicine, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Bingwei Wang
- Department of Anatomy, Histology and Embryology, School of Basic Medical Sciences, Health Science Center, Peking University, Beijing 100091, China
| | - Chen Li
- Department of Human Genetics and Women's Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310058, China
| | - Katherin Bleymehl
- Department of CardioMetabolic Diseases Research, Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach, 88397, Germany
| | - Stefan G. Kauschke
- Department of CardioMetabolic Diseases Research, Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach, 88397, Germany
| | - Volker Mack
- Department of CardioMetabolic Diseases Research, Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach, 88397, Germany
| | - Boris Ferger
- Department of CardioMetabolic Diseases Research, Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach, 88397, Germany
| | - Holger Klein
- Global Computational Biology and Digital Sciences, Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach, 88397, Germany
| | - Ruimao Zheng
- Department of Anatomy, Histology and Embryology, School of Basic Medical Sciences, Health Science Center, Peking University, Beijing 100091, China
| | - Shumin Duan
- Department of Neurosurgery of Second Affiliated Hospital and School of Brain Science and Brain Medicine, Key Laboratory for Biomedical Engineering of Education Ministry, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310058, China
- NHC and CAMS Key Laboratory of Medical Neurobiology, MOE Frontier Science Center for Brain Research and Brain Machine Integration, Key Laboratory of Precise Treatment and Clinical Translational Research of Neurological Diseases, School of Brain Science and Brain Medicine, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Hao Wang
- Department of Neurosurgery of Second Affiliated Hospital and School of Brain Science and Brain Medicine, Key Laboratory for Biomedical Engineering of Education Ministry, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310058, China
- Nanhu Brain-computer Interface Institute, Hangzhou 311100, China
- NHC and CAMS Key Laboratory of Medical Neurobiology, MOE Frontier Science Center for Brain Research and Brain Machine Integration, Key Laboratory of Precise Treatment and Clinical Translational Research of Neurological Diseases, School of Brain Science and Brain Medicine, Zhejiang University, Hangzhou, Zhejiang 310058, China
- Lingang Laboratory, Shanghai 200031, China
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Chen-Engerer HJ, Jaeger S, Bondarenko R, Sprengel R, Hengerer B, Rosenbrock H, Mack V, Schuelert N. Increasing the Excitatory Drive Rescues Excitatory/Inhibitory Imbalance and Mismatch Negativity Deficit Caused by Parvalbumin Specific GluA1 Deletion. Neuroscience 2022; 496:190-204. [PMID: 35750109 DOI: 10.1016/j.neuroscience.2022.06.027] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 05/02/2022] [Accepted: 06/15/2022] [Indexed: 11/25/2022]
Abstract
Disturbance in synaptic excitatory and inhibitory (E/I) transmission in the prefrontal cortex is considered a critical factor for cognitive dysfunction, a core symptom in schizophrenia. However, the cortical network pathophysiology induced by E/I imbalance is not well characterized, and an effective therapeutic strategy is lacking. In this study, we simulated imbalanced cortical network by using mice with parvalbumin neuron (PV) specific knockout of GluA1 (AMPA receptor subunit 1) (Gria1-PV KO) as an experimental model. Applying high-content confocal imaging and electrophysiological recordings in the medial prefrontal cortex (mPFC), we found structural and functional alterations in the local network of Gria1-PV KO mice. Additionally, we applied electroencephalography (EEG) to assess potential deficits in mismatch negativity (MMN), the standard readout in the clinic for measuring deviance detection and sensory information processing. Gria1-PV KO animals exhibited abnormal theta oscillation and MMN, which is consistent with clinical findings in cognitively impaired patients. Remarkably, we demonstrated that the glycine transporter 1 (GlyT1) inhibitor, Bitopertin, ameliorates E/I imbalance, hyperexcitability, and sensory processing malfunction in Gria1-PV KO mice. Our results suggest that PV-specific deletion of GluA1 might be an experimental approach for back translating the E/I imbalance observed in schizophrenic patients. Our work offers a systematic workflow to understand the effect of GlyT1 inhibition in restoring cortical network activity from single cells to local brain circuitry. This study highlights that selectively boosting NMDA receptor-mediated excitatory drive to enhance the network inhibitory transmission from interneurons to pyramidal neurons (PYs) is a potential therapeutic strategy for restoring E/I imbalance-associated cognitive-related abnormality.
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Affiliation(s)
- Hsing-Jung Chen-Engerer
- Central Nervous System Disease Research, Boehringer Ingelheim Pharma GmbH & Co. KG, Birkendorferstr. 65, 88397 Biberach Riß, Germany.
| | - Stefan Jaeger
- Central Nervous System Disease Research, Boehringer Ingelheim Pharma GmbH & Co. KG, Birkendorferstr. 65, 88397 Biberach Riß, Germany
| | - Rimma Bondarenko
- Central Nervous System Disease Research, Boehringer Ingelheim Pharma GmbH & Co. KG, Birkendorferstr. 65, 88397 Biberach Riß, Germany
| | - Rolf Sprengel
- Max Planck Institute for Medical Research at the Institute for Anatomy and Cell Biology at Heidelberg University, Germany
| | - Bastian Hengerer
- Central Nervous System Disease Research, Boehringer Ingelheim Pharma GmbH & Co. KG, Birkendorferstr. 65, 88397 Biberach Riß, Germany
| | - Holger Rosenbrock
- Central Nervous System Disease Research, Boehringer Ingelheim Pharma GmbH & Co. KG, Birkendorferstr. 65, 88397 Biberach Riß, Germany
| | - Volker Mack
- CardioMetabolic Disease Research, Boehringer Ingelheim Pharma GmbH & Co. KG, Birkendorferstr. 65, 88397 Biberach Riß, Germany
| | - Niklas Schuelert
- Central Nervous System Disease Research, Boehringer Ingelheim Pharma GmbH & Co. KG, Birkendorferstr. 65, 88397 Biberach Riß, Germany
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Pandya NJ, Seeger C, Babai N, Gonzalez-Lozano MA, Mack V, Lodder JC, Gouwenberg Y, Mansvelder HD, Danielson UH, Li KW, Heine M, Spijker S, Frischknecht R, Smit AB. Noelin1 Affects Lateral Mobility of Synaptic AMPA Receptors. Cell Rep 2019; 24:1218-1230. [PMID: 30067977 PMCID: PMC6088136 DOI: 10.1016/j.celrep.2018.06.102] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Revised: 04/26/2018] [Accepted: 06/26/2018] [Indexed: 11/24/2022] Open
Abstract
Lateral diffusion on the neuronal plasma membrane of the AMPA-type glutamate receptor (AMPAR) serves an important role in synaptic plasticity. We investigated the role of the secreted glycoprotein Noelin1 (Olfactomedin-1 or Pancortin) in AMPAR lateral mobility and its dependence on the extracellular matrix (ECM). We found that Noelin1 interacts with the AMPAR with high affinity, however, without affecting rise- and decay time and desensitization properties. Noelin1 co-localizes with synaptic and extra-synaptic AMPARs and is expressed at synapses in an activity-dependent manner. Single-particle tracking shows that Noelin1 reduces lateral mobility of both synaptic and extra-synaptic GluA1-containing receptors and affects short-term plasticity. While the ECM does not constrain the synaptic pool of AMPARs and acts only extrasynaptically, Noelin1 contributes to synaptic potentiation by limiting AMPAR mobility at synaptic sites. This is the first evidence for the role of a secreted AMPAR-interacting protein on mobility of GluA1-containing receptors and synaptic plasticity. Noelin1 interacts with high affinity to AMPA receptors (AMPARs) Noelin1 is secreted upon cellular stimulation (Extra)synaptic AMPAR mobility, but not channel properties, are affected by Noelin1 Reducing synaptic AMPAR lateral mobility by Noelin1 limits synaptic plasticity
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Affiliation(s)
- Nikhil J Pandya
- Department of Molecular and Cellular Neurobiology, Center for Neurogenomics and Cognitive Research, Amsterdam Neuroscience, VU University Amsterdam, De Boelelaan 1085, 1081 HV Amsterdam, the Netherlands
| | - Christian Seeger
- Beactica AB, Virdings allé 2, 754 50 Uppsala, Sweden; Department of Chemistry - BMC, Uppsala University, Box 576, 751 23 Uppsala, Sweden
| | - Norbert Babai
- Department of Biology, Animal Physiology, Friedrich Alexander University Erlangen-Nürnberg, 91058 Erlangen, Germany
| | - Miguel A Gonzalez-Lozano
- Department of Molecular and Cellular Neurobiology, Center for Neurogenomics and Cognitive Research, Amsterdam Neuroscience, VU University Amsterdam, De Boelelaan 1085, 1081 HV Amsterdam, the Netherlands
| | - Volker Mack
- Department of CNS Diseases Research, Boehringer Ingelheim Pharma GmbH and Co. KG, Biberach (an der Riss), Germany
| | - Johannes C Lodder
- Department of Integrative Neurophysiology, Center for Neurogenomics and Cognitive Research, Amsterdam Neuroscience, VU University Amsterdam, De Boelelaan 1085, 1081 HV Amsterdam, the Netherlands
| | - Yvonne Gouwenberg
- Department of Molecular and Cellular Neurobiology, Center for Neurogenomics and Cognitive Research, Amsterdam Neuroscience, VU University Amsterdam, De Boelelaan 1085, 1081 HV Amsterdam, the Netherlands
| | - Huibert D Mansvelder
- Department of Integrative Neurophysiology, Center for Neurogenomics and Cognitive Research, Amsterdam Neuroscience, VU University Amsterdam, De Boelelaan 1085, 1081 HV Amsterdam, the Netherlands
| | - U Helena Danielson
- Beactica AB, Virdings allé 2, 754 50 Uppsala, Sweden; Department of Chemistry - BMC, Uppsala University, Box 576, 751 23 Uppsala, Sweden
| | - Ka Wan Li
- Department of Molecular and Cellular Neurobiology, Center for Neurogenomics and Cognitive Research, Amsterdam Neuroscience, VU University Amsterdam, De Boelelaan 1085, 1081 HV Amsterdam, the Netherlands
| | - Martin Heine
- Research Group Molecular Physiology, Leibniz Institute for Neurobiology, Brenneckestrasse 6, 39118 Magdeburg, Germany
| | - Sabine Spijker
- Department of Molecular and Cellular Neurobiology, Center for Neurogenomics and Cognitive Research, Amsterdam Neuroscience, VU University Amsterdam, De Boelelaan 1085, 1081 HV Amsterdam, the Netherlands.
| | - Renato Frischknecht
- Department of Biology, Animal Physiology, Friedrich Alexander University Erlangen-Nürnberg, 91058 Erlangen, Germany; Department of Neurochemistry and Molecular Biology, Leibniz Institute for Neurobiology, Brenneckestrasse 6, 39118 Magdeburg, Germany
| | - August B Smit
- Department of Molecular and Cellular Neurobiology, Center for Neurogenomics and Cognitive Research, Amsterdam Neuroscience, VU University Amsterdam, De Boelelaan 1085, 1081 HV Amsterdam, the Netherlands.
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Tautermann CS, Binder F, Büttner FH, Eickmeier C, Fiegen D, Gross U, Grundl MA, Heilker R, Hobson S, Hoerer S, Luippold A, Mack V, Montel F, Peters S, Bhattacharya S, Vaidehi N, Schnapp G, Thamm S, Zeeb M. Allosteric Activation of Striatal-Enriched Protein Tyrosine Phosphatase (STEP, PTPN5) by a Fragment-like Molecule. J Med Chem 2018; 62:306-316. [PMID: 30207464 DOI: 10.1021/acs.jmedchem.8b00857] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Protein tyrosine phosphatase non-receptor type 5 (PTPN5, STEP) is a brain specific phosphatase that regulates synaptic function and plasticity by modulation of N-methyl-d-aspartate receptor (NMDAR) and α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid receptor (AMPAR) trafficking. Dysregulation of STEP has been linked to neurodegenerative and neuropsychiatric diseases, highlighting this enzyme as an attractive therapeutic target for drug discovery. Selective targeting of STEP with small molecules has been hampered by high conservation of the active site among protein tyrosine phosphatases. We report the discovery of the first small molecule allosteric activator for STEP that binds to the phosphatase domain. Allosteric binding is confirmed by both X-ray and 15N NMR experiments, and specificity has been demonstrated by an enzymatic test cascade. Molecular dynamics simulations indicate stimulation of enzymatic activity by a long-range allosteric mechanism. To allow the scientific community to make use of this tool, we offer to provide the compound in the course of an open innovation initiative.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | | | - Supriyo Bhattacharya
- Department of Molecular Immunology , Beckman Research Institute of the City of Hope , 1500, E. Duarte Road , Duarte , California 91010 , United States
| | - Nagarajan Vaidehi
- Department of Molecular Immunology , Beckman Research Institute of the City of Hope , 1500, E. Duarte Road , Duarte , California 91010 , United States
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5
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Carty N, Berson N, Tillack K, Thiede C, Scholz D, Kottig K, Sedaghat Y, Gabrysiak C, Yohrling G, von der Kammer H, Ebneth A, Mack V, Munoz-Sanjuan I, Kwak S. Characterization of HTT inclusion size, location, and timing in the zQ175 mouse model of Huntington's disease: an in vivo high-content imaging study. PLoS One 2015; 10:e0123527. [PMID: 25859666 PMCID: PMC4393127 DOI: 10.1371/journal.pone.0123527] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Accepted: 02/18/2015] [Indexed: 11/18/2022] Open
Abstract
Huntington's disease (HD) is an autosomal dominant neurodegenerative disorder caused by a CAG trinucleotide repeat expansion in the huntingtin gene. Major pathological hallmarks of HD include inclusions of mutant huntingtin (mHTT) protein, loss of neurons predominantly in the caudate nucleus, and atrophy of multiple brain regions. However, the early sequence of histological events that manifest in region- and cell-specific manner has not been well characterized. Here we use a high-content histological approach to precisely monitor changes in HTT expression and characterize deposition dynamics of mHTT protein inclusion bodies in the recently characterized zQ175 knock-in mouse line. We carried out an automated multi-parameter quantitative analysis of individual cortical and striatal cells in tissue slices from mice aged 2-12 months and confirmed biochemical reports of an age-associated increase in mHTT inclusions in this model. We also found distinct regional and subregional dynamics for inclusion number, size and distribution with subcellular resolution. We used viral-mediated suppression of total HTT in the striatum of zQ175 mice as an example of a therapeutically-relevant but heterogeneously transducing strategy to demonstrate successful application of this platform to quantitatively assess target engagement and outcome on a cellular basis.
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Affiliation(s)
| | | | | | | | - Diana Scholz
- Evotec AG, Manfred Eigen Campus, Hamburg, Germany
| | | | | | | | - George Yohrling
- CHDI Management/CHDI Foundation, Princeton, New Jersey, United States of America
| | | | | | - Volker Mack
- Evotec AG, Manfred Eigen Campus, Hamburg, Germany
| | | | - Seung Kwak
- CHDI Management/CHDI Foundation, Princeton, New Jersey, United States of America
- * E-mail:
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Tillack K, Mack V, Sedaghat Y, Scholz D, Gabrysiak C, Reichelt A, Kottig K, von der Kammer H, Munoz-Sanjuan I, Kwak S. M05 Prevention of Aggregate Formation by RNAI Knockdown of Huntingtin in the Q175 HD Mouse Model. J Neurol Psychiatry 2014. [DOI: 10.1136/jnnp-2014-309032.277] [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: 11/04/2022]
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7
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Smith MA, Mack V, Ebneth A, Moraes I, Felicetti B, Wood M, Schonfeld D, Mather O, Cesura A, Barker J. The structure of mammalian serine racemase: evidence for conformational changes upon inhibitor binding. J Biol Chem 2010; 285:12873-81. [PMID: 20106978 PMCID: PMC2857111 DOI: 10.1074/jbc.m109.050062] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2009] [Revised: 01/05/2010] [Indexed: 11/06/2022] Open
Abstract
Serine racemase is responsible for the synthesis of D-serine, an endogenous co-agonist for N-methyl-D-aspartate receptor-type glutamate receptors (NMDARs). This pyridoxal 5'-phosphate-dependent enzyme is involved both in the reversible conversion of L- to D-serine and serine catabolism by alpha,beta-elimination of water, thereby regulating D-serine levels. Because D-serine affects NMDAR signaling throughout the brain, serine racemase is a promising target for the treatment of disorders related to NMDAR dysfunction. To provide a molecular basis for rational drug design the x-ray crystal structures of human and rat serine racemase were determined at 1.5- and 2.1-A resolution, respectively, and in the presence and absence of the orthosteric inhibitor malonate. The structures revealed a fold typical of beta-family pyridoxal 5'-phosphate enzymes, with both a large domain and a flexible small domain associated into a symmetric dimer, and indicated a ligand-induced rearrangement of the small domain that organizes the active site for specific turnover of the substrate.
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Affiliation(s)
- Myron A Smith
- Department of Structural Biology and Biology, Evotec, 114 Milton Park, Abingdon, Oxon OX14 4SA, United Kingdom.
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von Engelhardt J, Mack V, Sprengel R, Kavenstock N, Li KW, Stern-Bach Y, Smit AB, Seeburg PH, Monyer H. CKAMP44: A Brain-Specific Protein Attenuating Short-Term Synaptic Plasticity in the Dentate Gyrus. Science 2010; 327:1518-22. [DOI: 10.1126/science.1184178] [Citation(s) in RCA: 210] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Affiliation(s)
- Jakob von Engelhardt
- Department of Clinical Neurobiology, University of Heidelberg, 6910 Heidelberg, Germany
| | - Volker Mack
- Department of Clinical Neurobiology, University of Heidelberg, 6910 Heidelberg, Germany
- Department of Molecular and Cellular Neurobiology, Center for Neurogenomics and Cognitive Research, Vrije Universiteit, 1081 HV Amsterdam, the Netherlands
| | - Rolf Sprengel
- Department of Molecular Neurobiology, Max Planck Institute for Medical Research, 69120 Heidelberg, Germany
| | - Netta Kavenstock
- Department of Biochemistry and Molecular Biology, Institute for Medical Research Israel-Canada (IMRIC), the Hebrew University–Hadassah Medical School, Jerusalem 91120, Israel
| | - Ka Wan Li
- Department of Molecular and Cellular Neurobiology, Center for Neurogenomics and Cognitive Research, Vrije Universiteit, 1081 HV Amsterdam, the Netherlands
| | - Yael Stern-Bach
- Department of Biochemistry and Molecular Biology, Institute for Medical Research Israel-Canada (IMRIC), the Hebrew University–Hadassah Medical School, Jerusalem 91120, Israel
| | - August B. Smit
- Department of Molecular and Cellular Neurobiology, Center for Neurogenomics and Cognitive Research, Vrije Universiteit, 1081 HV Amsterdam, the Netherlands
| | - Peter H. Seeburg
- Department of Molecular Neurobiology, Max Planck Institute for Medical Research, 69120 Heidelberg, Germany
| | - Hannah Monyer
- Department of Clinical Neurobiology, University of Heidelberg, 6910 Heidelberg, Germany
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Sokolov K, Aaron J, Kumar S, Mack V, Collier T, Coghlan L, Gillenwater A, Adler Storthz K, Follen M, Richards Kortum R. Molecular imaging of carcinogenesis with immuno-targeted nanoparticles. Conf Proc IEEE Eng Med Biol Soc 2007; 2004:5292-5. [PMID: 17271535 DOI: 10.1109/iembs.2004.1404478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Molecular characterization of cancer could have important clinical benefits such as earlier cancer detection based on molecular characterization, the ability to predict the risk of cancer progression, real time margin detection, the ability to rationally select molecular therapy and to monitor response to the therapy. We present a new class of molecular specific contrast agents for optical imaging of carcinogenesis in vivo - gold nanoparticles conjugated with monoclonal antibodies specific for cancer biomarkers.
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Affiliation(s)
- K Sokolov
- Department of Imaging Physics, Texas University, Houston, TX, USA
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Shimshek DR, Jensen V, Celikel T, Geng Y, Schupp B, Bus T, Mack V, Marx V, Hvalby Ø, Seeburg PH, Sprengel R. Forebrain-specific glutamate receptor B deletion impairs spatial memory but not hippocampal field long-term potentiation. J Neurosci 2006; 26:8428-40. [PMID: 16914668 PMCID: PMC6674347 DOI: 10.1523/jneurosci.5410-05.2006] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We demonstrate the fundamental importance of glutamate receptor B (GluR-B) containing AMPA receptors in hippocampal function by analyzing mice with conditional GluR-B deficiency in postnatal forebrain principal neurons (GluR-B(deltaFb)). These mice are as adults sufficiently robust to permit comparative cellular, physiological, and behavioral studies. GluR-B loss induced moderate long-term changes in the hippocampus of GluR-B(deltaFb) mice. Parvalbumin-expressing interneurons in the dentate gyrus and the pyramidal cells in CA3 were decreased in number, and neurogenesis in the subgranular zone was diminished. Excitatory synaptic CA3-to-CA1 transmission was reduced, although synaptic excitability, as quantified by the lowered threshold for population spike initiation, was increased compared with control mice. These changes did not alter CA3-to-CA1 long-term potentiation (LTP), which in magnitude was similar to LTP in control mice. The altered hippocampal circuitry, however, affected spatial learning in GluR-B(deltaFb) mice. The primary source for the observed changes is most likely the AMPA receptor-mediated Ca2+ signaling that appears after GluR-B depletion, because we observed similar alterations in GluR-B(QFb) mice in which the expression of Ca2+-permeable AMPA receptors in principal neurons was induced by postnatal activation of a Q/R-site editing-deficient GluR-B allele.
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Shimshek DR, Bus T, Kim J, Mihaljevic A, Mack V, Seeburg PH, Sprengel R, Schaefer AT. Enhanced odor discrimination and impaired olfactory memory by spatially controlled switch of AMPA receptors. PLoS Biol 2005; 3:e354. [PMID: 16216087 PMCID: PMC1255741 DOI: 10.1371/journal.pbio.0030354] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2005] [Accepted: 08/16/2005] [Indexed: 11/18/2022] Open
Abstract
Genetic perturbations of alpha-amino-3-hydroxy-5-methyl-4-isoxazolepropionate receptors (AMPARs) are widely used to dissect molecular mechanisms of sensory coding, learning, and memory. In this study, we investigated the role of Ca2+-permeable AMPARs in olfactory behavior. AMPAR modification was obtained by depletion of the GluR-B subunit or expression of unedited GluR-B(Q), both leading to increased Ca2+ permeability of AMPARs. Mice with this functional AMPAR switch, specifically in forebrain, showed enhanced olfactory discrimination and more rapid learning in a go/no-go operant conditioning task. Olfactory memory, however, was dramatically impaired. GluR-B depletion in forebrain was ectopically variable ("mosaic") among individuals and strongly correlated with decreased olfactory memory in hippocampus and cortex. Accordingly, memory was rescued by transgenic GluR-B expression restricted to piriform cortex and hippocampus, while enhanced odor discrimination was independent of both GluR-B variability and transgenic GluR-B expression. Thus, correlated differences in behavior and levels of GluR-B expression allowed a mechanistic and spatial dissection of olfactory learning, discrimination, and memory capabilities.
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Affiliation(s)
- Derya R Shimshek
- 1Max-Planck-Institut für medizinische Forschung, Heidelberg, Germany
| | - Thorsten Bus
- 1Max-Planck-Institut für medizinische Forschung, Heidelberg, Germany
| | - Jinhyun Kim
- 1Max-Planck-Institut für medizinische Forschung, Heidelberg, Germany
| | - Andre Mihaljevic
- 1Max-Planck-Institut für medizinische Forschung, Heidelberg, Germany
| | - Volker Mack
- 1Max-Planck-Institut für medizinische Forschung, Heidelberg, Germany
| | - Peter H Seeburg
- 1Max-Planck-Institut für medizinische Forschung, Heidelberg, Germany
| | - Rolf Sprengel
- 1Max-Planck-Institut für medizinische Forschung, Heidelberg, Germany
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Abstract
Synaptic trafficking of AMPA-Rs, controlled by small GTPase Ras signaling, plays a key role in synaptic plasticity. However, how Ras signals synaptic AMPA-R trafficking is unknown. Here we show that low levels of Ras activity stimulate extracellular signal-regulated kinase kinase (MEK)-p42/44 MAPK (extracellular signal-regulated kinase [ERK]) signaling, whereas high levels of Ras activity stimulate additional Pi3 kinase (Pi3K)-protein kinase B (PKB) signaling, each accounting for approximately 50% of the potentiation during long-term potentiation (LTP). Spontaneous neural activity stimulates the Ras-MEK-ERK pathway that drives GluR2L into synapses. In the presence of neuromodulator agonists, neural activity also stimulates the Ras-Pi3K-PKB pathway that drives GluR1 into synapses. Neuromodulator release increases with increases of vigilance. Correspondingly, Ras-MEK-ERK activity in sleeping animals is sufficient to deliver GluR2L into synapses, while additional increased Ras-Pi3K-PKB activity in awake animals delivers GluR1 into synapses. Thus, state-dependent Ras signaling, which specifies downstream MEK-ERK and Pi3K-PKB pathways, differentially control GluR2L- and GluR1-dependent synaptic plasticity.
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Affiliation(s)
- Yi Qin
- Department of Pharmacology and Neuroscience Graduate Program, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
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13
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Shimshek DR, Bus T, Grinevich V, Single FN, Mack V, Sprengel R, Spergel DJ, Seeburg PH. Impaired reproductive behavior by lack of GluR-B containing AMPA receptors but not of NMDA receptors in hypothalamic and septal neurons. Mol Endocrinol 2005; 20:219-31. [PMID: 16099814 DOI: 10.1210/me.2005-0262] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
The roles of ionotropic glutamate receptors in mammalian reproduction are unknown. We therefore generated mice lacking a major subtype of (S)-alpha-amino-3-hydroxy-5-methyl-isoxazolepropionic acid (AMPA) receptors or all N-methyl-d-aspartate (NMDA) receptors in GnRH neurons and other mainly limbic system neurons, primarily in hypothalamic and septal areas. Male mice without NMDA receptors in these neurons were not impaired in breeding and exhibited similar GnRH secretion as control littermates. However, male mice lacking GluR-B containing AMPA receptors in these neurons were poor breeders and severely impaired in reproductive behaviors such as aggression and mounting. Testis and sperm morphology, testis weight, and serum testosterone levels, as well as GnRH secretion, were unchanged. Contact with female cage bedding failed to elicit male sexual behavior in these mice, unlike in control male littermates. Their female counterparts had unchanged ovarian morphology, had bred successfully, and had normal litter sizes but exhibited pronounced impairments in maternal behaviors such as pup retrieval and maternal aggression. Our results suggest that NMDA receptors and GluR-B containing AMPA receptors are not essential for fertility, but that GluR-B containing AMPA receptors are essential for male and female reproduction-related behaviors, perhaps by mediating responses to pheromones or odorants.
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Affiliation(s)
- Derya R Shimshek
- Department of Molecular Neuroscience, Max-Planck-Institute for Medical Research, Heidelberg, Germany
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14
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Koksma JJ, Fritschy JM, Mack V, Van Kesteren RE, Brussaard AB. Differential GABAA receptor clustering determines GABA synapse plasticity in rat oxytocin neurons around parturition and the onset of lactation. Mol Cell Neurosci 2005; 28:128-40. [PMID: 15607948 DOI: 10.1016/j.mcn.2004.09.002] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2004] [Revised: 09/03/2004] [Accepted: 09/07/2004] [Indexed: 02/02/2023] Open
Abstract
Expression, functional properties, and clustering of alpha 1-, alpha 2-, and alpha 3-subunit containing GABA(A) receptors (GABA(A)Rs) were studied in dorsomedial SON neurons of the adult female rat supraoptic nucleus (SON) around parturition. We show that, although the decay time constant (tau(decay)) of GABAergic postsynaptic currents between and within individual recordings was very diverse, ranging from fast (i.e., alpha 1-like) to significantly slower (i.e., non-alpha 1-like), there was an overall shift towards slower decaying synaptic currents during the onset of lactation. This shift is not due to changes in mRNA expression levels, because real-time quantitative PCR assays indicated that the relative contribution of alpha 1, alpha 2, and alpha 3 remained the same before and after parturition. Also, changes in phosphorylation levels are not likely to affect the tau(decay) of postsynaptic currents. In alpha-latrotoxin (alpha-LTX)-induced bursts of synaptic currents from individual synapses, the tau(decay) of consecutive synaptic events within bursts was very similar, but between bursts there were large differences in tau(decay). This suggested that different synapses within individual SON neurons contain distinct GABA(A)R subtypes. Using multilabeling confocal microscopy, we examined the distribution of postsynaptic alpha 1-, alpha 2-, and alpha 3-GABA(A)Rs, based on colocalization with gephyrin. We show that the three GABA(A)R subtypes occurred either in segregated clusters of one subtype as well as in mixed clusters of two or possibly even three receptor subtypes. After parturition, the density and proportion of clusters containing alpha 2- (or alpha 3-), but not alpha1-GABA(A)Rs, was significantly increased. Thus, the functional synaptic diversity at the postsynaptic level in dorsomedial SON neurons is correlated with a differential clustering of distinct GABA(A)R subtypes at individual synapses.
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Affiliation(s)
- Jan-Jurjen Koksma
- Department of Experimental Neurophysiology, Centre for Neurogenomics and Cognitive Research, Vrije Universiteit Amsterdam, 1081 HV Amsterdam, The Netherlands
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15
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Schmitt WB, Sprengel R, Mack V, Draft RW, Seeburg PH, Deacon RMJ, Rawlins JNP, Bannerman DM. Restoration of spatial working memory by genetic rescue of GluR-A–deficient mice. Nat Neurosci 2005; 8:270-2. [PMID: 15723058 DOI: 10.1038/nn1412] [Citation(s) in RCA: 102] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2004] [Accepted: 01/24/2005] [Indexed: 11/08/2022]
Abstract
Gene-targeted mice lacking the AMPA receptor subunit GluR-A (also called GluR1 encoded by the gene Gria1,) have deficits in hippocampal CA3-CA1 long-term potentiation (LTP) and have profoundly impaired hippocampus-dependent spatial working memory (SWM) tasks, although their spatial reference memory remains normal. Here we show that forebrain-localized expression of GFP-tagged GluR-A subunits in GluR-A-deficient mice rescues SWM, paralleling its rescue of CA3-CA1 LTP. This provides powerful new evidence linking hippocampal GluR-A-dependent synaptic plasticity to rapid, flexible memory processing.
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Affiliation(s)
- W B Schmitt
- Department of Experimental Psychology, University of Oxford, South Parks Road, Oxford, OX1 3UD, UK
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Kolleker A, Zhu JJ, Schupp BJ, Qin Y, Mack V, Borchardt T, Köhr G, Malinow R, Seeburg PH, Osten P. Glutamatergic plasticity by synaptic delivery of GluR-B(long)-containing AMPA receptors. Neuron 2004; 40:1199-212. [PMID: 14687553 DOI: 10.1016/s0896-6273(03)00722-0] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.6] [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: 11/22/2022]
Abstract
Activity-driven delivery of AMPA receptors is proposed to mediate glutamatergic synaptic plasticity, both during development and learning. In hippocampal CA1 principal neurons, such trafficking is primarily mediated by the abundant GluR-A subunit. We now report a study of GluR-B(long), a C-terminal splice variant of the GluR-B subunit. GluR-B(long) synaptic delivery is regulated by two forms of activity. Spontaneous synaptic activity-driven GluR-B(long) transport maintains one-third of the steady-state AMPA receptor-mediated responses, while GluR-B(long) delivery following the induction of LTP is responsible for approximately 50% of the resulting potentiation at the hippocampal CA3 to CA1 synapses at the time of GluR-B(long) peak expression-the second postnatal week. Trafficking of GluR-B(long)-containing receptors thus mediates a GluR-A-independent form of glutamatergic synaptic plasticity in the juvenile hippocampus.
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Affiliation(s)
- Alexander Kolleker
- Max Planck Institute for Medical Research, Department of Molecular Neurobiology, Jahnstrasse 29, 69120, Heidelberg, Germany
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17
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Abstract
Homomeric glutamate receptor (GluR) channels become spontaneously active when the last alanine residue within the invariant SYTANLAAF-motif in the third membrane segment is substituted by threonine. The same mutation in the orphan GluRdelta2 channel is responsible for neurodegeneration in "Lurcher" (Lc) mice. Since most native GluRs are composed of different subunits, we investigated the effect of an Lc-mutated subunit in heteromeric kainate and AMPA receptors expressed in HEK293 cells. Kainate receptor KA2 subunits, either wild type or carrying the Lc mutation (KA2(Lc)), are retained inside the cell but are surface-expressed when assembled with GluR6 subunits. Importantly, KA2(Lc) dominates the gating of KA2(Lc)/GluR6(WT) channels, as revealed by spontaneous activation and by slowed desensitization and deactivation kinetics of ligand-activated whole-cell currents. Moreover, the AMPA receptor subunit GluR-B(Lc)(Q) which forms spontaneously active homomeric channels with rectifying current-voltage relationships, dominates the gating of heteromeric GluR-B(Lc)(Q)/GluR-A(R) channels. The spontaneous currents of these heteromeric AMPAR channels show linear current-voltage relationships, and the ligand-activated whole-cell currents display slower deactivation and desensitization kinetics than the respective wild-type channels. For heteromeric Lc-mutated kainate and AMPA receptors, the effects on kinetics were reduced relative to the homomeric Lc-mutated forms. Thus, an Lc-mutated subunit can potentially influence heteromeric channel function in vivo, and the severity of the phenotype will critically depend on the levels of homomeric GluR(Lc) and heteromeric GluR(Lc)/GluR(WT) channels.
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Affiliation(s)
- M K Schwarz
- Max-Planck-Institute for Medical Research, Molecular Neurobiology, D-69120 Heidelberg, Germany
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18
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Mack V, Burnashev N, Kaiser KM, Rozov A, Jensen V, Hvalby O, Seeburg PH, Sakmann B, Sprengel R. Conditional restoration of hippocampal synaptic potentiation in Glur-A-deficient mice. Science 2001; 292:2501-4. [PMID: 11431570 DOI: 10.1126/science.1059365] [Citation(s) in RCA: 97] [Impact Index Per Article: 4.2] [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: 11/02/2022]
Abstract
Plasticity of mature hippocampal CA1 synapses is dependent on l-alpha-amino-3-hydroxy-5-methylisoxazole-4-propionate (AMPA) receptors containing the glutamate receptor A (GluR-A) subunit. In GluR-A-deficient mice, plasticity could be restored by controlled expression of green fluorescent protein (GFP)-tagged GluR-A, which contributes to channel formation and displayed the developmental redistribution of AMPA receptors in CA1 pyramidal neurons. Long-term potentiation (LTP) induced by pairing or tetanic stimulation was rescued in adult GluR-A(-/-) mice when (GFP)GluR-A expression was constitutive or induced in already fully developed pyramidal cells. This shows that GluR-A-independent forms of synaptic plasticity can mediate the establishment of mature hippocampal circuits that are prebuilt to express GluR-A-dependent LTP.
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Affiliation(s)
- V Mack
- Department of Molecular Neurobiology, Max-Planck-Institute for Medical Research, D-69120 Heidelberg, Germany
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McEarchern JA, Kobie JJ, Mack V, Wu RS, Meade-Tollin L, Arteaga CL, Dumont N, Besselsen D, Seftor E, Hendrix MJ, Katsanis E, Akporiaye ET. Invasion and metastasis of a mammary tumor involves TGF-beta signaling. Int J Cancer 2001. [PMID: 11149423 DOI: 10.1002/1097-0215(20010101)91:1<76::aid-ijc1012>3.0.co;2-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Several studies have correlated escape from TGF-beta-mediated cell cycle arrest with the tumorigenic phenotype. Most often, this escape from growth control has been linked to dysfunctional TGF-beta receptors or defects in the TGF-beta-mediated SMAD signaling pathway. In this report, we found that highly metastatic 4T1 mammary carcinoma cells express functional TGF-beta receptors capable of initiating SMAD-mediated transcription, yet are not growth inhibited by TGF-beta1. We further observed that TGF-beta directly contributes to the metastatic behavior of this cell line. Exposure to TGF-beta caused 4T1 cells to undergo morphological changes associated with the metastatic phenotype and invade more readily through collagen coated matrices. Furthermore, expression of a dominant negative truncated type II receptor diminished TGF-beta signaling and significantly restricted the ability of 4T1 cells to establish distant metastases. Our results suggest that regardless of 4T1 resistance to TGF-beta-mediated growth inhibition, TGF-beta signaling is required for tumor invasion and metastases formation.
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Affiliation(s)
- J A McEarchern
- Department of Microbiology and Immunology, University of Arizona, Tucson 85724, USA
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20
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McEarchern JA, Kobie JJ, Mack V, Wu RS, Meade-Tollin L, Arteaga CL, Dumont N, Besselsen D, Seftor E, Hendrix MJ, Katsanis E, Akporiaye ET. Invasion and metastasis of a mammary tumor involves TGF-beta signaling. Int J Cancer 2001; 91:76-82. [PMID: 11149423 DOI: 10.1002/1097-0215(20010101)91:1<76::aid-ijc1012>3.0.co;2-8] [Citation(s) in RCA: 127] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Several studies have correlated escape from TGF-beta-mediated cell cycle arrest with the tumorigenic phenotype. Most often, this escape from growth control has been linked to dysfunctional TGF-beta receptors or defects in the TGF-beta-mediated SMAD signaling pathway. In this report, we found that highly metastatic 4T1 mammary carcinoma cells express functional TGF-beta receptors capable of initiating SMAD-mediated transcription, yet are not growth inhibited by TGF-beta1. We further observed that TGF-beta directly contributes to the metastatic behavior of this cell line. Exposure to TGF-beta caused 4T1 cells to undergo morphological changes associated with the metastatic phenotype and invade more readily through collagen coated matrices. Furthermore, expression of a dominant negative truncated type II receptor diminished TGF-beta signaling and significantly restricted the ability of 4T1 cells to establish distant metastases. Our results suggest that regardless of 4T1 resistance to TGF-beta-mediated growth inhibition, TGF-beta signaling is required for tumor invasion and metastases formation.
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MESH Headings
- Animals
- Blotting, Northern
- Blotting, Western
- Cell Cycle/drug effects
- Cell Division
- Cell Movement/drug effects
- Collagen/metabolism
- Cross-Linking Reagents/pharmacology
- DNA-Binding Proteins/metabolism
- Dose-Response Relationship, Drug
- Female
- Flow Cytometry
- Genes, Dominant
- Mammary Neoplasms, Animal/metabolism
- Mice
- Mice, SCID
- Microscopy, Confocal
- Neoplasm Invasiveness
- Phenotype
- Plasmids/metabolism
- Receptors, Transforming Growth Factor beta/biosynthesis
- Reverse Transcriptase Polymerase Chain Reaction
- Signal Transduction
- Transcription, Genetic
- Transforming Growth Factor beta/genetics
- Transforming Growth Factor beta/metabolism
- Transforming Growth Factor beta1
- Tumor Cells, Cultured
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Affiliation(s)
- J A McEarchern
- Department of Microbiology and Immunology, University of Arizona, Tucson 85724, USA
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Nayler WG, Stone J, Carson V, McInnes I, Mack V, Lowe TE. The effect of beta adrenergic antagonists on cardiac contractions, myofibrillar ATPase activity, high-energy phosphate stores and lipid-facilitated transfort of calciumiones. J Pharmacol Exp Ther 1969; 165:225-33. [PMID: 4236550] [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: 01/09/2023] Open
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