1
|
Gao V, Chlebowicz J, Gaskin K, Briano JA, Komer LE, Pineda A, Jhalani S, Ahmad S, Uwaifo E, Black LS, Haller JE, Przedborski S, Lane DA, Zhang S, Sharma M, Burré J. Synaptic vesicle-omics in mice captures signatures of aging and synucleinopathy. Nat Commun 2025; 16:4079. [PMID: 40312501 PMCID: PMC12046008 DOI: 10.1038/s41467-025-59441-7] [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: 08/31/2024] [Accepted: 04/23/2025] [Indexed: 05/03/2025] Open
Abstract
Neurotransmitter release occurs through exocytosis of synaptic vesicles. α-Synuclein's function and dysfunction in Parkinson's disease and other synucleinopathies is thought to be tightly linked to synaptic vesicle binding. Age is the biggest risk factor for synucleinopathy, and ~15% of synaptic vesicle proteins have been linked to central nervous system diseases. Yet, age- and disease-induced changes in synaptic vesicles remain unexplored. Via systematic analysis of synaptic vesicles at the ultrastructural, protein, and lipid levels, we reveal specific changes in synaptic vesicle populations, proteins, and lipids over age in wild-type mice and in α-synuclein knockout mice with and without expression of human α-synuclein. Strikingly, we find several previously undescribed synaptic changes in mice lacking α-synuclein, suggesting that loss of α-synuclein function contributes to synaptic dysfunction. These findings not only provide insights into synaptic vesicle biology and disease mechanisms in synucleinopathy, but also serve as a baseline for further mechanistic exploration of age- and disease-related alterations in synaptic vesicles.
Collapse
Affiliation(s)
- Virginia Gao
- Brain and Mind Research Institute, Appel Alzheimer's Disease Research Institute, Weill Cornell Medicine, New York, NY, 10021, USA
| | - Julita Chlebowicz
- Brain and Mind Research Institute, Appel Alzheimer's Disease Research Institute, Weill Cornell Medicine, New York, NY, 10021, USA
| | - Karlton Gaskin
- Brain and Mind Research Institute, Appel Alzheimer's Disease Research Institute, Weill Cornell Medicine, New York, NY, 10021, USA
| | - Juan A Briano
- Brain and Mind Research Institute, Appel Alzheimer's Disease Research Institute, Weill Cornell Medicine, New York, NY, 10021, USA
| | - Lauren E Komer
- Brain and Mind Research Institute, Appel Alzheimer's Disease Research Institute, Weill Cornell Medicine, New York, NY, 10021, USA
| | - André Pineda
- Brain and Mind Research Institute, Appel Alzheimer's Disease Research Institute, Weill Cornell Medicine, New York, NY, 10021, USA
| | - Shrey Jhalani
- Brain and Mind Research Institute, Appel Alzheimer's Disease Research Institute, Weill Cornell Medicine, New York, NY, 10021, USA
| | - Saad Ahmad
- Brain and Mind Research Institute, Appel Alzheimer's Disease Research Institute, Weill Cornell Medicine, New York, NY, 10021, USA
| | - Eseosa Uwaifo
- Brain and Mind Research Institute, Appel Alzheimer's Disease Research Institute, Weill Cornell Medicine, New York, NY, 10021, USA
| | - Luca S Black
- Brain and Mind Research Institute, Appel Alzheimer's Disease Research Institute, Weill Cornell Medicine, New York, NY, 10021, USA
| | - Jillian E Haller
- Brain and Mind Research Institute, Appel Alzheimer's Disease Research Institute, Weill Cornell Medicine, New York, NY, 10021, USA
| | - Serge Przedborski
- Departments of Neurology, Pathology & Cell Biology and Neuroscience, Columbia University, New York, NY, 10032, USA
| | - Diane A Lane
- Brain and Mind Research Institute, Appel Alzheimer's Disease Research Institute, Weill Cornell Medicine, New York, NY, 10021, USA
- Department of Biological Sciences, University of Notre Dame, Notre Dame, IN, 46556, USA
| | - Sheng Zhang
- Proteomics and Metabolomics Facility, Institute of Biotechnology, Cornell University, Ithaca, NY, 14853, USA
| | - Manu Sharma
- Brain and Mind Research Institute, Appel Alzheimer's Disease Research Institute, Weill Cornell Medicine, New York, NY, 10021, USA
| | - Jacqueline Burré
- Brain and Mind Research Institute, Appel Alzheimer's Disease Research Institute, Weill Cornell Medicine, New York, NY, 10021, USA.
| |
Collapse
|
2
|
Chivatá-Ávila JA, Rojas-Estevez P, Muñoz-Suarez AM, Caro-Morales E, Rengifo AC, Torres-Fernández O, Lozano JM, Álvarez-Díaz DA. Mild Zika Virus Infection in Mice Without Motor Impairments Induces Working Memory Deficits, Anxiety-like Behaviors, and Dysregulation of Immunity and Synaptic Vesicle Pathways. Viruses 2025; 17:405. [PMID: 40143332 PMCID: PMC11946058 DOI: 10.3390/v17030405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2025] [Revised: 03/04/2025] [Accepted: 03/10/2025] [Indexed: 03/28/2025] Open
Abstract
BACKGROUND The Zika virus (ZIKV) is an arbovirus linked to "Congenital Zika Syndrome" and a range of neurodevelopmental disorders (NDDs), with microcephaly as the most severe manifestation. Milder NDDs, such as autism spectrum disorders and delays in neuropsychomotor and language development, often go unnoticed in neonates, resulting in long-term social and academic difficulties. Murine models of ZIKV infection can be used to mimic part of the spectrum of motor and cognitive deficits observed in humans. These can be evaluated through behavioral tests, enabling comparison with gene expression profiles and aiding in the characterization of ZIKV-induced NDDs. OBJECTIVES This study aimed to identify genes associated with behavioral changes following a subtle ZIKV infection in juvenile BALB/c mice. METHODS Neonatal mice were subcutaneously inoculated with ZIKV (MH544701.2) on postnatal day 1 (DPN) at a dose of 6.8 × 103 PFU. Viral presence in the cerebellum and cortex was quantified at 10- and 30-days post-infection (DPI) using RT-qPCR. Neurobehavioral deficits were assessed at 30 DPI through T-maze, rotarod, and open field tests. Next-Generation Sequencing (NGS) was performed to identify differentially expressed genes (DEGs), which were analyzed through Gene Ontology (GO) and KEGG enrichment. Gene interaction networks were then constructed to explore gene interactions in the most enriched biological categories. RESULTS A ZIKV infection model was successfully established, enabling brain infection while allowing survival beyond 30 DPI. The infection induced mild cognitive behavioral changes, though motor and motivational functions remained unaffected. These cognitive changes were linked to the functional repression of synaptic vesicles and alterations in neuronal structure, suggesting potential disruptions in neuronal plasticity. CONCLUSIONS Moderate ZIKV infection with circulating strains from the 2016 epidemic may cause dysregulation of genes related to immune response, alterations in cytoskeletal organization, and modifications in cellular transport mediated by vesicles. Despite viral control, neurocognitive effects persisted, including memory deficits and anxiety-like behaviors, highlighting the long-term neurological consequences of ZIKV infection in models that show no apparent malformations.
Collapse
Affiliation(s)
- Jaime Alexander Chivatá-Ávila
- Grupo de Genómica de Microorganismos Emergentes, Dirección de Investigación en Salud Pública, Instituto Nacional de Salud, Bogotá 111321, Colombia; (J.A.C.-Á.); (P.R.-E.)
| | - Paola Rojas-Estevez
- Grupo de Genómica de Microorganismos Emergentes, Dirección de Investigación en Salud Pública, Instituto Nacional de Salud, Bogotá 111321, Colombia; (J.A.C.-Á.); (P.R.-E.)
| | - Alejandra M. Muñoz-Suarez
- Grupo de Animales de Laboratorio, Dirección de Producción, Instituto Nacional de Salud, Bogotá 111321, Colombia; (A.M.M.-S.); (E.C.-M.)
| | - Esthefanny Caro-Morales
- Grupo de Animales de Laboratorio, Dirección de Producción, Instituto Nacional de Salud, Bogotá 111321, Colombia; (A.M.M.-S.); (E.C.-M.)
| | - Aura Caterine Rengifo
- Grupo de Morfología Celular, Dirección de Investigación en Salud Pública, Instituto Nacional de Salud, Bogotá 111321, Colombia; (A.C.R.); (O.T.-F.)
| | - Orlando Torres-Fernández
- Grupo de Morfología Celular, Dirección de Investigación en Salud Pública, Instituto Nacional de Salud, Bogotá 111321, Colombia; (A.C.R.); (O.T.-F.)
| | - Jose Manuel Lozano
- Grupo Mimetismo Molecular de los Agentes Infecciosos, Departamento de Farmacia, Facultad de Ciencias, Universidad Nacional de Colombia, Bogotá 11001, Colombia;
| | - Diego A. Álvarez-Díaz
- Grupo de Genómica de Microorganismos Emergentes, Dirección de Investigación en Salud Pública, Instituto Nacional de Salud, Bogotá 111321, Colombia; (J.A.C.-Á.); (P.R.-E.)
- Grupo de Investigación y Desarrollo en Vacunas y Biológicos Estratégicos en Salud Pública, Dirección de Producción, Instituto Nacional de Salud, Bogotá 111321, Colombia
| |
Collapse
|
3
|
Sarkar S, Liu HY, Yuan F, Malady BT, Wang L, Perez J, Lafer EM, Huibregtse JM, Stachowiak JC. Epsin1 enforces a condensation-dependent checkpoint for ubiquitylated cargo during clathrin-mediated endocytosis. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2025:2025.02.12.637885. [PMID: 39990390 PMCID: PMC11844442 DOI: 10.1101/2025.02.12.637885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 02/25/2025]
Abstract
Clathrin-mediated endocytosis internalizes proteins and lipids from the cell surface, supporting nutrient uptake, signaling, and membrane trafficking. Recent work has demonstrated that a flexible, liquid-like network of initiator proteins is responsible for catalyzing assembly of clathrin-coated vesicles in diverse organisms including yeast, mammals, and plants. How do cells regulate the assembly of this dynamic network to produce cargo-loaded vesicles? Here we reveal the ability of an endocytic adaptor protein, Epsin1, to conditionally stabilize the initiator protein network, creating a cargo-dependent checkpoint during clathrin-mediated endocytosis. Epsin1 is known to recruit ubiquitylated transmembrane proteins to endocytic sites. Using in vitro assays, we demonstrate that Epsin1 uses competitive binding and steric repulsion to destabilize condensation of initiator proteins in the absence of ubiquitin. However, when polyubiquitin is present, Epsin1 binds to both ubiquitin and initiator proteins, creating attractive interactions that stabilize condensation. Similarly, in mammalian cells, endocytic dynamics and ligand uptake are disrupted by removal of either ubiquitin or Epsin1. Surprisingly, when Epsin1 and ubiquitin are removed simultaneously, endocytic defects are rescued to near wildtype levels, although endocytic sites lose the ability to distinguish between ubiquitylated and non-ubiquitylated cargos. Taken together, these results suggest that Epsin1 tunes protein condensation to ensure the presence of ubiquitylated cargo during assembly of clathrin-coated vesicles. More broadly, these findings illustrate how a balance of attractive and repulsive molecular interactions controls the stability of liquid-like protein networks, providing dynamic control over key cellular events.
Collapse
Affiliation(s)
- Susovan Sarkar
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX, United States
| | - Hao-Yang Liu
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX, United States
| | - Feng Yuan
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX, United States
| | - Brandon T. Malady
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX, United States
| | - Liping Wang
- Department of Biochemistry and Structural Biology, The University of Texas Health Science Center at San Antonio, San Antonio, TX, United States
| | - Jessica Perez
- Department of Molecular Biosciences, The University of Texas at Austin, Austin, TX, United States
| | - Eileen M. Lafer
- Department of Biochemistry and Structural Biology, The University of Texas Health Science Center at San Antonio, San Antonio, TX, United States
| | - Jon M. Huibregtse
- Department of Molecular Biosciences, The University of Texas at Austin, Austin, TX, United States
| | - Jeanne C. Stachowiak
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX, United States
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, TX, United States
| |
Collapse
|
4
|
Liu HY, Ashby G, Yuan F, Sarkar S, Hayden CC, Huibregtse JM, Stachowiak JC. Poly-ubiquitylated transmembrane proteins outcompete other cargo for limited space inside clathrin-coated vesicles. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.12.17.628947. [PMID: 39763860 PMCID: PMC11702697 DOI: 10.1101/2024.12.17.628947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/18/2025]
Abstract
Endocytic recycling of transmembrane proteins is essential to cell signaling, ligand uptake, protein traffic and degradation. The intracellular domains of many transmembrane proteins are ubiquitylated, which promotes their internalization by clathrin-mediated endocytosis. How might this enhanced internalization impact endocytic uptake of transmembrane proteins that lack ubiquitylation? Recent work demonstrates that diverse transmembrane proteins compete for space within highly crowded endocytic structures, suggesting that enhanced internalization of one group of transmembrane proteins may come at the expense of other groups. Here we show that preferential internalization of poly-ubiquitylated transmembrane proteins results in reduced endocytosis of mono-ubiquitylated and non-ubiquitylated proteins. Using a combination of live-cell imaging and ligand uptake assays, we confirmed that increased ubiquitylation correlates with increased internalization by clathrin-coated vesicles. Further, poly-ubiquitylated receptors significantly outcompeted their mono-ubiquitylated and non-ubiquitylated counterparts for localization to endocytic sites and uptake of extracellular ligands. These findings demonstrate the inherent interdependence of transmembrane protein recycling, suggesting that clathrin-coated vesicles act as selective filters, prioritizing highly ubiquitylated transmembrane proteins for uptake while leaving proteins with little or no ubiquitylation behind. Given that poly-ubiquitylation is thought to signal protein aging and damage, our findings suggest a mechanism for selective internalization of high priority cargo proteins, with simultaneously exclusion and protection of functional proteins that lack poly-ubiquitylation. Significance Ubiquitylation is essential for maintaining cellular homeostasis by regulating transmembrane protein trafficking, degradation, and signaling. Traditionally, poly-ubiquitylation has been viewed primarily as a signal for protein degradation, while mono-ubiquitylation is considered sufficient to trigger endocytosis. However, our work reveals a previously unrecognized role for poly-ubiquitylation in clathrin-mediated endocytosis, demonstrating that poly-ubiquitylated transmembrane proteins outcompete their non-ubiquitylated counterparts for incorporation into clathrin-coated vesicles, thereby establishing a competitive framework for endocytic cargo sorting. This mechanism reveals a selective sorting mechanism driven by the extent of ubiquitylation, which could regulate the removal of damaged proteins while protecting functional proteins at the plasma membrane.
Collapse
Affiliation(s)
- Hao-Yang Liu
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX, United States
| | - Grant Ashby
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX, United States
| | - Feng Yuan
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX, United States
| | - Susovan Sarkar
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX, United States
| | - Carl C. Hayden
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX, United States
| | - Jon M. Huibregtse
- Department of Molecular Biosciences, The University of Texas at Austin, Austin, TX, United States
| | - Jeanne C. Stachowiak
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX, United States
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, TX, United States
| |
Collapse
|
5
|
Yuan F, Gollapudi S, Day KJ, Ashby G, Sangani A, Malady BT, Wang L, Lafer EM, Huibregtse JM, Stachowiak JC. Ubiquitin-driven protein condensation stabilizes clathrin-mediated endocytosis. PNAS NEXUS 2024; 3:pgae342. [PMID: 39253396 PMCID: PMC11382290 DOI: 10.1093/pnasnexus/pgae342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/28/2024] [Accepted: 07/30/2024] [Indexed: 09/11/2024]
Abstract
Clathrin-mediated endocytosis is an essential cellular pathway that enables signaling and recycling of transmembrane proteins and lipids. During endocytosis, dozens of cytosolic proteins come together at the plasma membrane, assembling into a highly interconnected network that drives endocytic vesicle biogenesis. Recently, multiple groups have reported that early endocytic proteins form flexible condensates, which provide a platform for efficient assembly of endocytic vesicles. Given the importance of this network in the dynamics of endocytosis, how might cells regulate its stability? Many receptors and endocytic proteins are ubiquitylated, while early endocytic proteins such as Eps15 contain ubiquitin-interacting motifs. Therefore, we examined the influence of ubiquitin on the stability of the early endocytic protein network. In vitro, we found that recruitment of small amounts of polyubiquitin dramatically increased the stability of Eps15 condensates, suggesting that ubiquitylation could nucleate endocytic assemblies. In live-cell imaging experiments, a version of Eps15 that lacked the ubiquitin-interacting motif failed to rescue defects in endocytic initiation created by Eps15 knockout. Furthermore, fusion of Eps15 to a deubiquitylase enzyme destabilized nascent endocytic sites within minutes. In both in vitro and live-cell settings, dynamic exchange of Eps15 proteins, a measure of protein network stability, was decreased by Eps15-ubiquitin interactions and increased by loss of ubiquitin. These results collectively suggest that ubiquitylation drives assembly of the flexible protein network responsible for catalyzing endocytic events. More broadly, this work illustrates a biophysical mechanism by which ubiquitylated transmembrane proteins at the plasma membrane could regulate the efficiency of endocytic internalization.
Collapse
Affiliation(s)
- Feng Yuan
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX 78712, USA
| | - Sadhana Gollapudi
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX 78712, USA
| | - Kasey J Day
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX 78712, USA
| | - Grant Ashby
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX 78712, USA
| | - Arjun Sangani
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX 78712, USA
| | - Brandon T Malady
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX 78712, USA
| | - Liping Wang
- Department of Biochemistry and Structural Biology, The University of Texas Health Science Center at San Antonio, San Antonio, TX 78229, USA
| | - Eileen M Lafer
- Department of Biochemistry and Structural Biology, The University of Texas Health Science Center at San Antonio, San Antonio, TX 78229, USA
| | - Jon M Huibregtse
- Department of Molecular Biosciences, The University of Texas at Austin, Austin, TX 78712, USA
| | - Jeanne C Stachowiak
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX 78712, USA
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, TX 78712, USA
| |
Collapse
|
6
|
Harders RH, Morthorst TH, Landgrebe LE, Lande AD, Fuglsang MS, Mortensen SB, Feteira-Montero V, Jensen HH, Wesseltoft JB, Olsen A. CED-6/GULP and components of the clathrin-mediated endocytosis machinery act redundantly to correctly display CED-1 on the cell membrane in Caenorhabditis elegans. G3 (BETHESDA, MD.) 2024; 14:jkae088. [PMID: 38696649 PMCID: PMC11228867 DOI: 10.1093/g3journal/jkae088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2024] [Revised: 04/03/2024] [Accepted: 04/16/2024] [Indexed: 05/04/2024]
Abstract
CED-1 (cell death abnormal) is a transmembrane receptor involved in the recognition of "eat-me" signals displayed on the surface of apoptotic cells and thus central for the subsequent engulfment of the cell corpse in Caenorhabditis elegans. The roles of CED-1 in engulfment are well established, as are its downstream effectors. The latter include the adapter protein CED-6/GULP and the ATP-binding cassette family homolog CED-7. However, how CED-1 is maintained on the plasma membrane in the absence of engulfment is currently unknown. Here, we show that CED-6 and CED-7 have a novel role in maintaining CED-1 correctly on the plasma membrane. We propose that the underlying mechanism is via endocytosis as CED-6 and CED-7 act redundantly with clathrin and its adaptor, the Adaptor protein 2 complex, in ensuring correct CED-1 localization. In conclusion, CED-6 and CED-7 impact other cellular processes than engulfment of apoptotic cells.
Collapse
Affiliation(s)
- Rikke Hindsgaul Harders
- Department of Chemistry and Bioscience, Aalborg University, Fredrik Bajers Vej 7H, Aalborg, DK-9220, Denmark
| | - Tine H Morthorst
- Department of Molecular Biology and Genetics, Aarhus University, Gustav Wieds Vej 10C, Aarhus, DK-8000, Denmark
| | - Line E Landgrebe
- Department of Molecular Biology and Genetics, Aarhus University, Gustav Wieds Vej 10C, Aarhus, DK-8000, Denmark
| | - Anna D Lande
- Department of Molecular Biology and Genetics, Aarhus University, Gustav Wieds Vej 10C, Aarhus, DK-8000, Denmark
| | - Marie Sikjær Fuglsang
- Department of Molecular Biology and Genetics, Aarhus University, Gustav Wieds Vej 10C, Aarhus, DK-8000, Denmark
| | - Stine Bothilde Mortensen
- Department of Chemistry and Bioscience, Aalborg University, Fredrik Bajers Vej 7H, Aalborg, DK-9220, Denmark
| | - Verónica Feteira-Montero
- Department of Chemistry and Bioscience, Aalborg University, Fredrik Bajers Vej 7H, Aalborg, DK-9220, Denmark
| | - Helene Halkjær Jensen
- Department of Chemistry and Bioscience, Aalborg University, Fredrik Bajers Vej 7H, Aalborg, DK-9220, Denmark
| | - Jonas Bruhn Wesseltoft
- Department of Chemistry and Bioscience, Aalborg University, Fredrik Bajers Vej 7H, Aalborg, DK-9220, Denmark
| | - Anders Olsen
- Department of Chemistry and Bioscience, Aalborg University, Fredrik Bajers Vej 7H, Aalborg, DK-9220, Denmark
| |
Collapse
|
7
|
Xiong GJ, Sheng ZH. Presynaptic perspective: Axonal transport defects in neurodevelopmental disorders. J Cell Biol 2024; 223:e202401145. [PMID: 38568173 PMCID: PMC10988239 DOI: 10.1083/jcb.202401145] [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: 01/27/2024] [Revised: 03/20/2024] [Accepted: 03/21/2024] [Indexed: 04/05/2024] Open
Abstract
Disruption of synapse assembly and maturation leads to a broad spectrum of neurodevelopmental disorders. Presynaptic proteins are largely synthesized in the soma, where they are packaged into precursor vesicles and transported into distal axons to ensure precise assembly and maintenance of presynapses. Due to their morphological features, neurons face challenges in the delivery of presynaptic cargos to nascent boutons. Thus, targeted axonal transport is vital to build functional synapses. A growing number of mutations in genes encoding the transport machinery have been linked to neurodevelopmental disorders. Emerging lines of evidence have started to uncover presynaptic mechanisms underlying axonal transport defects, thus broadening the view of neurodevelopmental disorders beyond postsynaptic mechanisms. In this review, we discuss presynaptic perspectives of neurodevelopmental disorders by focusing on impaired axonal transport and disturbed assembly and maintenance of presynapses. We also discuss potential strategies for restoring axonal transport as an early therapeutic intervention.
Collapse
Affiliation(s)
- Gui-Jing Xiong
- Synaptic Function Section, The Porter Neuroscience Research Center, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA
| | - Zu-Hang Sheng
- Synaptic Function Section, The Porter Neuroscience Research Center, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA
| |
Collapse
|
8
|
Yuan F, Gollapudi S, Day K, Ashby G, Sangani A, Malady B, Wang L, Lafer EM, Huibregtse J, Stachowiak J. Ubiquitin-driven protein condensation initiates clathrin-mediated endocytosis. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2023.08.21.554139. [PMID: 37662320 PMCID: PMC10473642 DOI: 10.1101/2023.08.21.554139] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/05/2023]
Abstract
Clathrin-mediated endocytosis is an essential cellular pathway that enables signaling and recycling of transmembrane proteins and lipids. During endocytosis, dozens of cytosolic proteins come together at the plasma membrane, assembling into a highly interconnected network that drives endocytic vesicle biogenesis. Recently, multiple groups have reported that early endocytic proteins form flexible condensates, which provide a platform for efficient assembly of endocytic vesicles. Given the importance of this network in the dynamics of endocytosis, how might cells regulate its stability? Many receptors and endocytic proteins are ubiquitylated, while early endocytic proteins such as Eps15 contain ubiquitin-interacting motifs. Therefore, we examined the influence of ubiquitin on the stability of the early endocytic protein network. In vitro, we found that recruitment of small amounts of polyubiquitin dramatically increased the stability of Eps15 condensates, suggesting that ubiquitylation could nucleate endocytic assemblies. In live cell imaging experiments, a version of Eps15 that lacked the ubiquitin-interacting motif failed to rescue defects in endocytic initiation created by Eps15 knockout. Furthermore, fusion of Eps15 to a deubiquitylase enzyme destabilized nascent endocytic sites within minutes. In both in vitro and live cell settings, dynamic exchange of Eps15 proteins, a hallmark of liquidlike systems, was modulated by Eps15-Ub interactions. These results collectively suggest that ubiquitylation drives assembly of the flexible protein network responsible for catalyzing endocytic events. More broadly, this work illustrates a biophysical mechanism by which ubiquitylated transmembrane proteins at the plasma membrane could regulate the efficiency of endocytic recycling.
Collapse
|
9
|
Sengül GF, Mishra R, Candiello E, Schu P. Hsc70 phosphorylation patterns and calmodulin regulate AP2 Clathrin-Coated-Vesicle life span for cell adhesion protein transport. BIOCHIMICA ET BIOPHYSICA ACTA. MOLECULAR CELL RESEARCH 2024; 1871:119611. [PMID: 37926156 DOI: 10.1016/j.bbamcr.2023.119611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 10/17/2023] [Accepted: 10/17/2023] [Indexed: 11/07/2023]
Abstract
AP2 forms AP2 CCV with clathrin and over 60 additional coat proteins. Due to this complexity, we have a limited understanding of CCV life cycle regulation. Synapses contain canonical AP2 CCV, canCCV, and more stable, thereby longer lived, AP2 CCV. The more stable AP2 CCV can be distinguished from canCCV due to the stable binding of Hsc70 to clathrin. The AP1/σ1B complex knockout leads to impaired synaptic vesicle recycling and altered endosomal protein sorting. This causes as a secondary phenotype the twofold upregulation of endocytosis by canCCV and by more stable AP2 CCV. These stable CCV are more stabilized than their wt counterpart, hence stCCV. They have less of the uncoating proteins synaptojanin1 and Hsc70, and more of the coat stabilizing AAK1. Hsc70 clathrin dissociation activity is regulated by complex phosphorylation patterns. Two major groups of hyper- and of hypo-phosphorylated Hsc70 proteins are formed. The latter are enriched in wt stable CCV and stabilized stCCV. Hsc70 T265 phosphorylation regulates binding of CaM/Ca2+. CaM/Ca2+ binding to the T265 domain blocks Hsc70 homodimerization and its concentration in stCCV required for clathrin disassembly. Kinases DYRK1A and CaMK-IIδ can phosphorylate T265 preventing CaM/Ca2+ binding. Their and the levels of STK38L and STK39/Cab39, which are able to phosphorylate additional Hsc70 residues are reduced in stCCV. The stCCV pathway sorts specifically the cell adhesion proteins CHL1 and Neurocan, supporting our model of that the stCCV pathway fulfills specific functions in synaptic plasticity.
Collapse
Affiliation(s)
- G F Sengül
- Georg-August-University Göttingen, University Medical Center, Department of Cellular Biochemistry, Humboldtallee 23, 37073 Göttingen, Germany; Ankara Medipol University, Faculty of Medicine, Department of Medical Biochemistry, Turkey
| | - R Mishra
- Georg-August-University Göttingen, University Medical Center, Department of Cellular Biochemistry, Humboldtallee 23, 37073 Göttingen, Germany; Dept. of Clinical Neurosciences, John van Geest Centre for Brain Repair, University of Cambridge, England, United Kingdom
| | - E Candiello
- Georg-August-University Göttingen, University Medical Center, Department of Cellular Biochemistry, Humboldtallee 23, 37073 Göttingen, Germany; University of Turin, Tumor Immunology Laboratory, Torino, Italy
| | - P Schu
- Georg-August-University Göttingen, University Medical Center, Department of Cellular Biochemistry, Humboldtallee 23, 37073 Göttingen, Germany.
| |
Collapse
|
10
|
Sansevrino R, Hoffmann C, Milovanovic D. Condensate biology of synaptic vesicle clusters. Trends Neurosci 2023; 46:293-306. [PMID: 36725404 DOI: 10.1016/j.tins.2023.01.001] [Citation(s) in RCA: 42] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Revised: 12/20/2022] [Accepted: 01/10/2023] [Indexed: 01/31/2023]
Abstract
Neuronal communication crucially relies on exocytosis of neurotransmitters from synaptic vesicles (SVs) which are clustered at synapses. To ensure reliable neurotransmitter release, synapses need to maintain an adequate pool of SVs at all times. Decades of research have established that SVs are clustered by synapsin 1, an abundant SV-associated phosphoprotein. The classical view postulates that SVs are crosslinked in a scaffold of protein-protein interactions between synapsins and their binding partners. Recent studies have shown that synapsins cluster SVs via liquid-liquid phase separation (LLPS), thus providing a new framework for the organization of the synapse. We discuss the evidence for phase separation of SVs, emphasizing emerging questions related to its regulation, specificity, and reversibility.
Collapse
Affiliation(s)
- Roberto Sansevrino
- Laboratory of Molecular Neuroscience, German Center for Neurodegenerative Diseases (DZNE), 10117 Berlin, Germany
| | - Christian Hoffmann
- Laboratory of Molecular Neuroscience, German Center for Neurodegenerative Diseases (DZNE), 10117 Berlin, Germany
| | - Dragomir Milovanovic
- Laboratory of Molecular Neuroscience, German Center for Neurodegenerative Diseases (DZNE), 10117 Berlin, Germany.
| |
Collapse
|
11
|
Vidyadhara DJ, Somayaji M, Wade N, Yücel B, Zhao H, Shashaank N, Ribaudo J, Gupta J, Lam TT, Sames D, Greene LE, Sulzer DL, Chandra SS. Dopamine transporter and synaptic vesicle sorting defects underlie auxilin-associated Parkinson's disease. Cell Rep 2023; 42:112231. [PMID: 36920906 PMCID: PMC10127800 DOI: 10.1016/j.celrep.2023.112231] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Revised: 12/22/2022] [Accepted: 02/22/2023] [Indexed: 03/16/2023] Open
Abstract
Auxilin participates in the uncoating of clathrin-coated vesicles (CCVs), thereby facilitating synaptic vesicle (SV) regeneration at presynaptic sites. Auxilin (DNAJC6/PARK19) loss-of-function mutations cause early-onset Parkinson's disease (PD). Here, we utilized auxilin knockout (KO) mice to elucidate the mechanisms through which auxilin deficiency and clathrin-uncoating deficits lead to PD. Auxilin KO mice display cardinal features of PD, including progressive motor deficits, α-synuclein pathology, nigral dopaminergic loss, and neuroinflammation. Significantly, treatment with L-DOPA ameliorated motor deficits. Unbiased proteomic and neurochemical analyses of auxilin KO brains indicated dopamine dyshomeostasis. We validated these findings by demonstrating slower dopamine reuptake kinetics in vivo, an effect associated with dopamine transporter misrouting into axonal membrane deformities in the dorsal striatum. Defective SV protein sorting and elevated synaptic autophagy also contribute to ineffective dopamine sequestration and compartmentalization, ultimately leading to neurodegeneration. This study provides insights into how presynaptic endocytosis deficits lead to dopaminergic vulnerability and pathogenesis of PD.
Collapse
Affiliation(s)
- D J Vidyadhara
- Department of Neurology, Yale University, New Haven, CT, USA; Department of Neuroscience, Yale University, New Haven, CT, USA
| | - Mahalakshmi Somayaji
- Department of Psychiatry, Columbia University, New York, NY, USA; Division of Molecular Therapeutics, New York State Psychiatric Institute, New York, NY, USA
| | - Nigel Wade
- Department of Neurology, Yale University, New Haven, CT, USA; Department of Neuroscience, Yale University, New Haven, CT, USA
| | - Betül Yücel
- Department of Neurology, Yale University, New Haven, CT, USA; Department of Neuroscience, Yale University, New Haven, CT, USA
| | - Helen Zhao
- Department of Neurology, Yale University, New Haven, CT, USA
| | - N Shashaank
- Division of Molecular Therapeutics, New York State Psychiatric Institute, New York, NY, USA; Department of Computer Science, Columbia University, New York, NY, USA; New York Genome Center, New York, NY, USA
| | - Joseph Ribaudo
- Department of Neurology, Yale University, New Haven, CT, USA
| | - Jyoti Gupta
- Department of Neuroscience, Yale University, New Haven, CT, USA
| | - TuKiet T Lam
- Keck MS and Proteomics Resource, Departments of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT, USA
| | - Dalibor Sames
- Department of Chemistry and NeuroTechnology Center, Columbia University, New York, NY, USA
| | - Lois E Greene
- Laboratory of Cell Biology, NHLBI, National Institutes of Health, Bethesda, MD, USA
| | - David L Sulzer
- Department of Psychiatry, Columbia University, New York, NY, USA; Division of Molecular Therapeutics, New York State Psychiatric Institute, New York, NY, USA; Departments of Neurology and Pharmacology, Columbia University, New York, NY, USA; Aligning Science Across Parkinson's (ASAP) Collaborative Research Network, Chevy Chase, MD, USA
| | - Sreeganga S Chandra
- Department of Neurology, Yale University, New Haven, CT, USA; Department of Neuroscience, Yale University, New Haven, CT, USA; Aligning Science Across Parkinson's (ASAP) Collaborative Research Network, Chevy Chase, MD, USA; Program in Cellular Neuroscience, Neurodegeneration and Repair, Yale University, New Haven, CT, USA.
| |
Collapse
|
12
|
Krishnan S, Klingauf J. The readily retrievable pool of synaptic vesicles. Biol Chem 2023; 404:385-397. [PMID: 36867726 DOI: 10.1515/hsz-2022-0298] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Accepted: 02/16/2023] [Indexed: 03/05/2023]
Abstract
In the CNS communication between neurons occurs at synapses by secretion of neurotransmitter via exocytosis of synaptic vesicles (SVs) at the active zone. Given the limited number of SVs in presynaptic boutons a fast and efficient recycling of exocytosed membrane and proteins by triggered compensatory endocytosis is required to maintain neurotransmission. Thus, pre-synapses feature a unique tight coupling of exo- and endocytosis in time and space resulting in the reformation of SVs with uniform morphology and well-defined molecular composition. This rapid response requires early stages of endocytosis at the peri-active zone to be well choreographed to ensure reformation of SVs with high fidelity. The pre-synapse can address this challenge by a specialized membrane microcompartment, where a pre-sorted and pre-assembled readily retrievable pool (RRetP) of endocytic membrane patches is formed, consisting of the vesicle cargo, presumably bound within a nucleated Clathrin and adaptor complex. This review considers evidence for the RRetP microcompartment to be the primary organizer of presynaptic triggered compensatory endocytosis.
Collapse
Affiliation(s)
- Sai Krishnan
- Institute of Medical Physics and Biophysics, University of Münster, Robert-Koch Strasse 31, D-48149, Münster, Germany
| | - Jürgen Klingauf
- Institute of Medical Physics and Biophysics, University of Münster, Robert-Koch Strasse 31, D-48149, Münster, Germany.,Center for Soft Nanoscience, Busso-Peus Strasse 10, D-48149, Münster, Germany
| |
Collapse
|
13
|
Jacquemyn J, Kuenen S, Swerts J, Pavie B, Vijayan V, Kilic A, Chabot D, Wang YC, Schoovaerts N, Corthout N, Verstreken P. Parkinsonism mutations in DNAJC6 cause lipid defects and neurodegeneration that are rescued by Synj1. NPJ Parkinsons Dis 2023; 9:19. [PMID: 36739293 PMCID: PMC9899244 DOI: 10.1038/s41531-023-00459-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Accepted: 01/16/2023] [Indexed: 02/06/2023] Open
Abstract
Recent evidence links dysfunctional lipid metabolism to the pathogenesis of Parkinson's disease, but the mechanisms are not resolved. Here, we generated a new Drosophila knock-in model of DNAJC6/Auxilin and find that the pathogenic mutation causes synaptic dysfunction, neurological defects and neurodegeneration, as well as specific lipid metabolism alterations. In these mutants, membrane lipids containing long-chain polyunsaturated fatty acids, including phosphatidylinositol lipid species that are key for synaptic vesicle recycling and organelle function, are reduced. Overexpression of another protein mutated in Parkinson's disease, Synaptojanin-1, known to bind and metabolize specific phosphoinositides, rescues the DNAJC6/Auxilin lipid alterations, the neuronal function defects and neurodegeneration. Our work reveals a functional relation between two proteins mutated in Parkinsonism and implicates deregulated phosphoinositide metabolism in the maintenance of neuronal integrity and neuronal survival.
Collapse
Affiliation(s)
- Julie Jacquemyn
- VIB-KU Leuven Center for Brain & Disease Research, 3000, Leuven, Belgium
- KU Leuven, Department of Neurosciences, Leuven Brain Institute, Mission Lucidity, 3000, Leuven, Belgium
- Neuroscience and Mental Health Institute, University of Alberta, Department of Physiology, Department of Cell Biology, Group on Molecular and Cell Biology of Lipids, Edmonton, Alberta, Canada
| | - Sabine Kuenen
- VIB-KU Leuven Center for Brain & Disease Research, 3000, Leuven, Belgium
- KU Leuven, Department of Neurosciences, Leuven Brain Institute, Mission Lucidity, 3000, Leuven, Belgium
| | - Jef Swerts
- VIB-KU Leuven Center for Brain & Disease Research, 3000, Leuven, Belgium
- KU Leuven, Department of Neurosciences, Leuven Brain Institute, Mission Lucidity, 3000, Leuven, Belgium
| | - Benjamin Pavie
- VIB-KU Leuven Center for Brain & Disease Research, 3000, Leuven, Belgium
- KU Leuven, Department of Neurosciences, Leuven Brain Institute, Mission Lucidity, 3000, Leuven, Belgium
- VIB-Bioimaging Core, 3000, Leuven, Belgium
| | - Vinoy Vijayan
- VIB-KU Leuven Center for Brain & Disease Research, 3000, Leuven, Belgium
- KU Leuven, Department of Neurosciences, Leuven Brain Institute, Mission Lucidity, 3000, Leuven, Belgium
| | - Ayse Kilic
- VIB-KU Leuven Center for Brain & Disease Research, 3000, Leuven, Belgium
- KU Leuven, Department of Neurosciences, Leuven Brain Institute, Mission Lucidity, 3000, Leuven, Belgium
| | - Dries Chabot
- VIB-KU Leuven Center for Brain & Disease Research, 3000, Leuven, Belgium
- KU Leuven, Department of Neurosciences, Leuven Brain Institute, Mission Lucidity, 3000, Leuven, Belgium
| | - Yu-Chun Wang
- VIB-KU Leuven Center for Brain & Disease Research, 3000, Leuven, Belgium
- KU Leuven, Department of Neurosciences, Leuven Brain Institute, Mission Lucidity, 3000, Leuven, Belgium
- VIB Technology Watch, Technology Innovation Laboratory, VIB, Gent, Belgium
| | - Nils Schoovaerts
- VIB-KU Leuven Center for Brain & Disease Research, 3000, Leuven, Belgium
- KU Leuven, Department of Neurosciences, Leuven Brain Institute, Mission Lucidity, 3000, Leuven, Belgium
| | - Nikky Corthout
- VIB-KU Leuven Center for Brain & Disease Research, 3000, Leuven, Belgium
- KU Leuven, Department of Neurosciences, Leuven Brain Institute, Mission Lucidity, 3000, Leuven, Belgium
- VIB-Bioimaging Core, 3000, Leuven, Belgium
| | - Patrik Verstreken
- VIB-KU Leuven Center for Brain & Disease Research, 3000, Leuven, Belgium.
- KU Leuven, Department of Neurosciences, Leuven Brain Institute, Mission Lucidity, 3000, Leuven, Belgium.
| |
Collapse
|
14
|
Kozlov MM, Taraska JW. Generation of nanoscopic membrane curvature for membrane trafficking. Nat Rev Mol Cell Biol 2023; 24:63-78. [PMID: 35918535 DOI: 10.1038/s41580-022-00511-9] [Citation(s) in RCA: 41] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/20/2022] [Indexed: 11/09/2022]
Abstract
Curved membranes are key features of intracellular organelles, and their generation involves dynamic protein complexes. Here we describe the fundamental mechanisms such as the hydrophobic insertion, scaffolding and crowding mechanisms these proteins use to produce membrane curvatures and complex shapes required to form intracellular organelles and vesicular structures involved in endocytosis and secretion. For each mechanism, we discuss its cellular functions as well as the underlying physical principles and the specific membrane properties required for the mechanism to be feasible. We propose that the integration of individual mechanisms into a highly controlled, robust process of curvature generation often relies on the assembly of proteins into coats. How cells unify and organize the curvature-generating factors at the nanoscale is presented for three ubiquitous coats central for membrane trafficking in eukaryotes: clathrin-coated pits, caveolae, and COPI and COPII coats. The emerging theme is that these coats arrange and coordinate curvature-generating factors in time and space to dynamically shape membranes to accomplish membrane trafficking within cells.
Collapse
Affiliation(s)
- Michael M Kozlov
- Department of Physiology and Pharmacology, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.
| | - Justin W Taraska
- Biochemistry and Biophysics Center, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA.
| |
Collapse
|
15
|
Dahhan DA, Reynolds GD, Cárdenas JJ, Eeckhout D, Johnson A, Yperman K, Kaufmann WA, Vang N, Yan X, Hwang I, Heese A, De Jaeger G, Friml J, Van Damme D, Pan J, Bednarek SY. Proteomic characterization of isolated Arabidopsis clathrin-coated vesicles reveals evolutionarily conserved and plant-specific components. THE PLANT CELL 2022; 34:2150-2173. [PMID: 35218346 PMCID: PMC9134090 DOI: 10.1093/plcell/koac071] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Accepted: 02/22/2022] [Indexed: 05/26/2023]
Abstract
In eukaryotes, clathrin-coated vesicles (CCVs) facilitate the internalization of material from the cell surface as well as the movement of cargo in post-Golgi trafficking pathways. This diversity of functions is partially provided by multiple monomeric and multimeric clathrin adaptor complexes that provide compartment and cargo selectivity. The adaptor-protein assembly polypeptide-1 (AP-1) complex operates as part of the secretory pathway at the trans-Golgi network (TGN), while the AP-2 complex and the TPLATE complex jointly operate at the plasma membrane to execute clathrin-mediated endocytosis. Key to our further understanding of clathrin-mediated trafficking in plants will be the comprehensive identification and characterization of the network of evolutionarily conserved and plant-specific core and accessory machinery involved in the formation and targeting of CCVs. To facilitate these studies, we have analyzed the proteome of enriched TGN/early endosome-derived and endocytic CCVs isolated from dividing and expanding suspension-cultured Arabidopsis (Arabidopsis thaliana) cells. Tandem mass spectrometry analysis results were validated by differential chemical labeling experiments to identify proteins co-enriching with CCVs. Proteins enriched in CCVs included previously characterized CCV components and cargos such as the vacuolar sorting receptors in addition to conserved and plant-specific components whose function in clathrin-mediated trafficking has not been previously defined. Notably, in addition to AP-1 and AP-2, all subunits of the AP-4 complex, but not AP-3 or AP-5, were found to be in high abundance in the CCV proteome. The association of AP-4 with suspension-cultured Arabidopsis CCVs is further supported via additional biochemical data.
Collapse
Affiliation(s)
| | | | - Jessica J Cárdenas
- Department of Biochemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
| | - Dominique Eeckhout
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent 9052, Belgium
- VIB Center for Plant Systems Biology, Ghent 9052, Belgium
| | - Alexander Johnson
- Institute of Science and Technology (IST Austria), Klosterneuburg 3400, Austria
| | | | - Walter A Kaufmann
- Institute of Science and Technology (IST Austria), Klosterneuburg 3400, Austria
| | - Nou Vang
- Department of Biochemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
| | - Xu Yan
- College Life Sciences, Lanzhou University, Lanzhou 730000, China
| | - Inhwan Hwang
- Department of Life Sciences, Pohang University of Science & Technology, Pohang 37673, Korea
| | - Antje Heese
- Division of Biochemistry, Interdisciplinary Plant Group, University of Missouri-Columbia, Columbia, Missouri 65211, USA
| | - Geert De Jaeger
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent 9052, Belgium
- VIB Center for Plant Systems Biology, Ghent 9052, Belgium
| | - Jiří Friml
- Institute of Science and Technology (IST Austria), Klosterneuburg 3400, Austria
| | - Daniël Van Damme
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent 9052, Belgium
- VIB Center for Plant Systems Biology, Ghent 9052, Belgium
| | - Jianwei Pan
- College Life Sciences, Lanzhou University, Lanzhou 730000, China
| | | |
Collapse
|
16
|
Dahhan DA, Reynolds GD, Cárdenas JJ, Eeckhout D, Johnson A, Yperman K, Kaufmann WA, Vang N, Yan X, Hwang I, Heese A, De Jaeger G, Friml J, Van Damme D, Pan J, Bednarek SY. Proteomic characterization of isolated Arabidopsis clathrin-coated vesicles reveals evolutionarily conserved and plant-specific components. THE PLANT CELL 2022; 34:2150-2173. [PMID: 35218346 DOI: 10.1101/2021.09.16.460678] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Accepted: 02/22/2022] [Indexed: 05/26/2023]
Abstract
In eukaryotes, clathrin-coated vesicles (CCVs) facilitate the internalization of material from the cell surface as well as the movement of cargo in post-Golgi trafficking pathways. This diversity of functions is partially provided by multiple monomeric and multimeric clathrin adaptor complexes that provide compartment and cargo selectivity. The adaptor-protein assembly polypeptide-1 (AP-1) complex operates as part of the secretory pathway at the trans-Golgi network (TGN), while the AP-2 complex and the TPLATE complex jointly operate at the plasma membrane to execute clathrin-mediated endocytosis. Key to our further understanding of clathrin-mediated trafficking in plants will be the comprehensive identification and characterization of the network of evolutionarily conserved and plant-specific core and accessory machinery involved in the formation and targeting of CCVs. To facilitate these studies, we have analyzed the proteome of enriched TGN/early endosome-derived and endocytic CCVs isolated from dividing and expanding suspension-cultured Arabidopsis (Arabidopsis thaliana) cells. Tandem mass spectrometry analysis results were validated by differential chemical labeling experiments to identify proteins co-enriching with CCVs. Proteins enriched in CCVs included previously characterized CCV components and cargos such as the vacuolar sorting receptors in addition to conserved and plant-specific components whose function in clathrin-mediated trafficking has not been previously defined. Notably, in addition to AP-1 and AP-2, all subunits of the AP-4 complex, but not AP-3 or AP-5, were found to be in high abundance in the CCV proteome. The association of AP-4 with suspension-cultured Arabidopsis CCVs is further supported via additional biochemical data.
Collapse
Affiliation(s)
- Dana A Dahhan
- Department of Biochemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
| | - Gregory D Reynolds
- Department of Biochemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
| | - Jessica J Cárdenas
- Department of Biochemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
| | - Dominique Eeckhout
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent 9052, Belgium
- VIB Center for Plant Systems Biology, Ghent 9052, Belgium
| | - Alexander Johnson
- Institute of Science and Technology (IST Austria), Klosterneuburg 3400, Austria
| | - Klaas Yperman
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent 9052, Belgium
- VIB Center for Plant Systems Biology, Ghent 9052, Belgium
| | - Walter A Kaufmann
- Institute of Science and Technology (IST Austria), Klosterneuburg 3400, Austria
| | - Nou Vang
- Department of Biochemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
| | - Xu Yan
- College Life Sciences, Lanzhou University, Lanzhou 730000, China
| | - Inhwan Hwang
- Department of Life Sciences, Pohang University of Science & Technology, Pohang 37673, Korea
| | - Antje Heese
- Division of Biochemistry, Interdisciplinary Plant Group, University of Missouri-Columbia, Columbia, Missouri 65211, USA
| | - Geert De Jaeger
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent 9052, Belgium
- VIB Center for Plant Systems Biology, Ghent 9052, Belgium
| | - Jiří Friml
- Institute of Science and Technology (IST Austria), Klosterneuburg 3400, Austria
| | - Daniël Van Damme
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent 9052, Belgium
- VIB Center for Plant Systems Biology, Ghent 9052, Belgium
| | - Jianwei Pan
- College Life Sciences, Lanzhou University, Lanzhou 730000, China
| | - Sebastian Y Bednarek
- Department of Biochemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
| |
Collapse
|
17
|
Singleton KS, Faundez V. Robustness and innovation along the endocytic route: Lessons from darkness. J Cell Biol 2021; 220:e202105030. [PMID: 34081082 PMCID: PMC8178755 DOI: 10.1083/jcb.202105030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
What mechanisms ensure the loading of a SNARE into a nascent carrier? In this issue, Bowman et al. (2021. J. Cell Biol.https://doi.org/10.1083/jcb.202005173) describe an unprecedented mechanism where two sorting complexes, AP-3 and BLOC-1, the latter bound to syntaxin 13, work as a fail-safe to recognize sorting signals in VAMP7, a membrane protein required for fusion to melanosomes. Their observations define one of the first examples of distributed robustness in membrane traffic mechanisms.
Collapse
Affiliation(s)
| | - Victor Faundez
- Department of Cell Biology, Emory University, Atlanta, GA
| |
Collapse
|
18
|
CALM supports clathrin-coated vesicle completion upon membrane tension increase. Proc Natl Acad Sci U S A 2021; 118:2010438118. [PMID: 34155137 DOI: 10.1073/pnas.2010438118] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
The most represented components of clathrin-coated vesicles (CCVs) are clathrin triskelia and the adaptors clathrin assembly lymphoid myeloid leukemia protein (CALM) and the heterotetrameric complex AP2. Investigation of the dynamics of AP180-amino-terminal-homology (ANTH) recruitment during CCV formation has been hampered by CALM toxicity upon overexpression. We used knock-in gene editing to express a C-terminal-attached fluorescent version of CALM, while preserving its endogenous expression levels, and cutting-edge live-cell microscopy approaches to study CALM recruitment at forming CCVs. Our results demonstrate that CALM promotes vesicle completion upon membrane tension increase as a function of the amount of this adaptor present. Since the expression of adaptors, including CALM, differs among cells, our data support a model in which the efficiency of clathrin-mediated endocytosis is tissue specific and explain why CALM is essential during embryogenesis and red blood cell development.
Collapse
|
19
|
A unified resource and configurable model of the synapse proteome and its role in disease. Sci Rep 2021; 11:9967. [PMID: 33976238 PMCID: PMC8113277 DOI: 10.1038/s41598-021-88945-7] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Accepted: 04/15/2021] [Indexed: 02/03/2023] Open
Abstract
Genes encoding synaptic proteins are highly associated with neuronal disorders many of which show clinical co-morbidity. We integrated 58 published synaptic proteomic datasets that describe over 8000 proteins and combined them with direct protein-protein interactions and functional metadata to build a network resource that reveals the shared and unique protein components that underpin multiple disorders. All the data are provided in a flexible and accessible format to encourage custom use.
Collapse
|
20
|
Camblor-Perujo S, Kononenko NL. Brain-specific functions of the endocytic machinery. FEBS J 2021; 289:2219-2246. [PMID: 33896112 DOI: 10.1111/febs.15897] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 03/29/2021] [Indexed: 12/12/2022]
Abstract
Endocytosis is an essential cellular process required for multiple physiological functions, including communication with the extracellular environment, nutrient uptake, and signaling by the cell surface receptors. In a broad sense, endocytosis is accomplished through either constitutive or ligand-induced invagination of the plasma membrane, which results in the formation of the plasma membrane-retrieved endocytic vesicles, which can either be sent for degradation to the lysosomes or recycled back to the PM. This additional function of endocytosis in membrane retrieval has been adopted by excitable cells, such as neurons, for membrane equilibrium maintenance at synapses. The last two decades were especially productive with respect to the identification of brain-specific functions of the endocytic machinery, which additionally include but not limited to regulation of neuronal differentiation and migration, maintenance of neuron morphology and synaptic plasticity, and prevention of neurotoxic aggregates spreading. In this review, we highlight the current knowledge of brain-specific functions of endocytic machinery with a specific focus on three brain cell types, neuronal progenitor cells, neurons, and glial cells.
Collapse
Affiliation(s)
| | - Natalia L Kononenko
- CECAD Cluster of Excellence, University of Cologne, Germany.,Center for Physiology & Pathophysiology, Medical Faculty, University of Cologne, Germany
| |
Collapse
|
21
|
Enkler L, Rinaldi B, de Craene JO, Hammann P, Nureki O, Senger B, Friant S, Becker HD. Cex1 is a component of the COPI intracellular trafficking machinery. Biol Open 2021; 10:bio.058528. [PMID: 33753324 PMCID: PMC8015235 DOI: 10.1242/bio.058528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
COPI (coatomer complex I) coated vesicles are involved in Golgi-to-ER and intra-Golgi trafficking pathways, and mediate retrieval of ER resident proteins. Functions and components of the COPI-mediated trafficking pathways, beyond the canonical set of Sec/Arf proteins, are constantly increasing in number and complexity. In mammalian cells, GORAB, SCYL1 and SCYL3 proteins regulate Golgi morphology and protein glycosylation in concert with the COPI machinery. Here, we show that Cex1, homologous to the mammalian SCYL proteins, is a component of the yeast COPI machinery, by interacting with Sec27, Sec28 and Sec33 (Ret1/Cop1) proteins of the COPI coat. Cex1 was initially reported to mediate channeling of aminoacylated tRNA outside of the nucleus. Our data show that Cex1 localizes at membrane compartments, on structures positive for the Sec33 α-COP subunit. Moreover, the Wbp1 protein required for N-glycosylation and interacting via its di-lysine motif with the Sec27 β′-COP subunit is mis-targeted in cex1Δ deletion mutant cells. Our data point to the possibility of developing Cex1 yeast-based models to study neurodegenerative disorders linked to pathogenic mutations of its human homologue SCYL1. Summary: Cex1, the yeast homologue of mammalian SCYL1, interacts with COPI coat components and is recruited to the Golgi to regulate retrograde vesicular trafficking and sorting
Collapse
Affiliation(s)
- Ludovic Enkler
- Génétique Moléculaire et Cellulaire, Université de Strasbourg, CNRS, GMGM UMR7156, F-67000 Strasbourg, France
| | - Bruno Rinaldi
- Génétique Moléculaire et Cellulaire, Université de Strasbourg, CNRS, GMGM UMR7156, F-67000 Strasbourg, France
| | - Johan Owen de Craene
- Génétique Moléculaire et Cellulaire, Université de Strasbourg, CNRS, GMGM UMR7156, F-67000 Strasbourg, France
| | - Philippe Hammann
- 'Architecture et Réactivité de l'ARN', Université de Strasbourg, CNRS, Institut de Biologie Moléculaire et Cellulaire, F-67000 Strasbourg, France
| | - Osamu Nureki
- Department of Biophysics and Biochemistry, Graduate School of Science, The University of Tokyo, Tokyo 113-0032, Japan
| | - Bruno Senger
- Génétique Moléculaire et Cellulaire, Université de Strasbourg, CNRS, GMGM UMR7156, F-67000 Strasbourg, France
| | - Sylvie Friant
- Génétique Moléculaire et Cellulaire, Université de Strasbourg, CNRS, GMGM UMR7156, F-67000 Strasbourg, France
| | - Hubert D Becker
- Génétique Moléculaire et Cellulaire, Université de Strasbourg, CNRS, GMGM UMR7156, F-67000 Strasbourg, France
| |
Collapse
|
22
|
Wittig S, Ganzella M, Barth M, Kostmann S, Riedel D, Pérez-Lara Á, Jahn R, Schmidt C. Cross-linking mass spectrometry uncovers protein interactions and functional assemblies in synaptic vesicle membranes. Nat Commun 2021; 12:858. [PMID: 33558502 PMCID: PMC7870876 DOI: 10.1038/s41467-021-21102-w] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2020] [Accepted: 12/18/2020] [Indexed: 02/08/2023] Open
Abstract
Synaptic vesicles are storage organelles for neurotransmitters. They pass through a trafficking cycle and fuse with the pre-synaptic membrane when an action potential arrives at the nerve terminal. While molecular components and biophysical parameters of synaptic vesicles have been determined, our knowledge on the protein interactions in their membranes is limited. Here, we apply cross-linking mass spectrometry to study interactions of synaptic vesicle proteins in an unbiased approach without the need for specific antibodies or detergent-solubilisation. Our large-scale analysis delivers a protein network of vesicle sub-populations and functional assemblies including an active and an inactive conformation of the vesicular ATPase complex as well as non-conventional arrangements of the luminal loops of SV2A, Synaptophysin and structurally related proteins. Based on this network, we specifically target Synaptobrevin-2, which connects with many proteins, in different approaches. Our results allow distinction of interactions caused by 'crowding' in the vesicle membrane from stable interaction modules.
Collapse
Affiliation(s)
- Sabine Wittig
- Interdisciplinary Research Centre HALOmem, Charles Tanford Protein Centre, Institute for Biochemistry and Biotechnology, Martin Luther University Halle-Wittenberg, Halle, Germany
| | - Marcelo Ganzella
- Department for Neurobiology, Max Planck Institute for Biophysical Chemistry, Göttingen, Germany
| | - Marie Barth
- Interdisciplinary Research Centre HALOmem, Charles Tanford Protein Centre, Institute for Biochemistry and Biotechnology, Martin Luther University Halle-Wittenberg, Halle, Germany
| | - Susann Kostmann
- Interdisciplinary Research Centre HALOmem, Charles Tanford Protein Centre, Institute for Biochemistry and Biotechnology, Martin Luther University Halle-Wittenberg, Halle, Germany
| | - Dietmar Riedel
- Department for Neurobiology, Max Planck Institute for Biophysical Chemistry, Göttingen, Germany
| | - Ángel Pérez-Lara
- Department for Neurobiology, Max Planck Institute for Biophysical Chemistry, Göttingen, Germany
- Department of Physical Chemistry, Faculty of Pharmacy, University of Granada, Granada, Spain
| | - Reinhard Jahn
- Department for Neurobiology, Max Planck Institute for Biophysical Chemistry, Göttingen, Germany
| | - Carla Schmidt
- Interdisciplinary Research Centre HALOmem, Charles Tanford Protein Centre, Institute for Biochemistry and Biotechnology, Martin Luther University Halle-Wittenberg, Halle, Germany.
| |
Collapse
|
23
|
Perić I, Costina V, Gass P, Findeisen P, Filipović D. Hippocampal synaptoproteomic changes of susceptibility and resilience of male rats to chronic social isolation. Brain Res Bull 2020; 166:128-141. [PMID: 33238171 DOI: 10.1016/j.brainresbull.2020.11.013] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 11/07/2020] [Accepted: 11/18/2020] [Indexed: 12/22/2022]
Abstract
The susceptibility of an individual to chronic social isolation (CSIS) stress may cause major depression (MD) whereby some individuals are resistant to the stress. Recent studies relate MD with altered expression of synaptic proteins in specific brain regions. To explore the neurobiological underpinnings and identify candidate biomarkers of susceptibility or resilience to CSIS, a comparative proteomic approach was used to map hippocampal synaptic protein alterations of rats exposed to 6 weeks of CSIS, an animal model of depression. This model generates two stress-response phenotypes: CSIS-sensitive (depressive-like behaviour) and CSIS-resilience assessed by means of sucrose preference and forced swim tests. Our aim was to characterize the synaptoproteome changes representative of potential long-term changes in protein expression underlying susceptibility or resilience to stress. Proteomic data showed increased expression of glycolytic enzymes, the energy-related mitochondrial proteins, actin cytoskeleton, signalling transduction and synaptic transmission proteins in CSIS-sensitive rats. Protein levels of glutamate-related enzymes such as glutamate dehydrogenase and glutamine synthetase were also increased. CSIS-resilient rats showed similar proteome changes, however with a weaker increase compared to CSIS-sensitive rats. The main difference was observed in the level of protein expression of vesicle-mediated transport proteins. Nonetheless, only few proteins were uniquely up-regulated in the CSIS-resilient rats, whereby Cytochrome b-c1 complex subunit 2, mitochondrial (Uqcrc2) and Voltage-dependent anion-selective channel protein 1 (Vdac1) were uniquely down-regulated. Identified altered activated pathways and potential protein biomarkers may help us better understand the molecular mechanisms underlying synaptic neurotransmission in MD or resilience, crucial for development of new therapeutics.
Collapse
Affiliation(s)
- Ivana Perić
- Molecular Biology and Endocrinology MBE-090, "VINČA", Institute of Nuclear Sciences - National Institute of thе Republic of Serbia, University of Belgrade, Belgrade, Serbia
| | - Victor Costina
- Institute for Clinical Chemistry, Medical Faculty Mannheim of the University of Heidelberg, University Hospital Mannheim, Mannheim, Germany
| | - Peter Gass
- Institute of Psychopharmacology, Central Institute of Mental Health, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Peter Findeisen
- Institute for Clinical Chemistry, Medical Faculty Mannheim of the University of Heidelberg, University Hospital Mannheim, Mannheim, Germany
| | - Dragana Filipović
- Molecular Biology and Endocrinology MBE-090, "VINČA", Institute of Nuclear Sciences - National Institute of thе Republic of Serbia, University of Belgrade, Belgrade, Serbia.
| |
Collapse
|
24
|
Overhoff M, De Bruyckere E, Kononenko NL. Mechanisms of neuronal survival safeguarded by endocytosis and autophagy. J Neurochem 2020; 157:263-296. [PMID: 32964462 DOI: 10.1111/jnc.15194] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Revised: 08/21/2020] [Accepted: 09/08/2020] [Indexed: 12/11/2022]
Abstract
Multiple aspects of neuronal physiology crucially depend on two cellular pathways, autophagy and endocytosis. During endocytosis, extracellular components either unbound or recognized by membrane-localized receptors (termed "cargo") become internalized into plasma membrane-derived vesicles. These can serve to either recycle the material back to the plasma membrane or send it for degradation to lysosomes. Autophagy also uses lysosomes as a terminal degradation point, although instead of degrading the plasma membrane-derived cargo, autophagy eliminates detrimental cytosolic material and intracellular organelles, which are transported to lysosomes by means of double-membrane vesicles, referred to as autophagosomes. Neurons, like all non-neuronal cells, capitalize on autophagy and endocytosis to communicate with the environment and maintain protein and organelle homeostasis. Additionally, the highly polarized, post-mitotic nature of neurons made them adopt these two pathways for cell-specific functions. These include the maintenance of the synaptic vesicle pool in the pre-synaptic terminal and the long-distance transport of signaling molecules. Originally discovered independently from each other, it is now clear that autophagy and endocytosis are closely interconnected and share several common participating molecules. Considering the crucial role of autophagy and endocytosis in cell type-specific functions in neurons, it is not surprising that defects in both pathways have been linked to the pathology of numerous neurodegenerative diseases. In this review, we highlight the recent knowledge of the role of endocytosis and autophagy in neurons with a special focus on synaptic physiology and discuss how impairments in genes coding for autophagy and endocytosis proteins can cause neurodegeneration.
Collapse
Affiliation(s)
- Melina Overhoff
- CECAD Cluster of Excellence, Institute for Genetics, University of Cologne, Cologne, Germany
| | - Elodie De Bruyckere
- CECAD Cluster of Excellence, Institute for Genetics, University of Cologne, Cologne, Germany
| | - Natalia L Kononenko
- CECAD Cluster of Excellence, Institute for Genetics, University of Cologne, Cologne, Germany
| |
Collapse
|
25
|
Abdul Manap AS, Madhavan P, Vijayabalan S, Chia A, Fukui K. Explicating anti-amyloidogenic role of curcumin and piperine via amyloid beta (A β) explicit pathway: recovery and reversal paradigm effects. PeerJ 2020; 8:e10003. [PMID: 33062432 PMCID: PMC7532763 DOI: 10.7717/peerj.10003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Accepted: 08/30/2020] [Indexed: 12/28/2022] Open
Abstract
Previously, we reported the synergistic effects of curcumin and piperine in cell cultures as potential anti-cholinesterase and anti-amyloidogenic agents. Due to limited findings on the enrolment of these compounds on epigenetic events in AD, we aimed at elucidating the expression profiles of Aβ42-induced SH-SY5Y cells using microarray profiling. In this study, an optimized concentration of 35 µM of curcumin and piperine in combination was used to treat Aβ42 fibril and high-throughput microarray profiling was performed on the extracted RNA. This was then compared to curcumin and piperine used singularly at 49.11 µM and 25 µM, respectively. Our results demonstrated that in the curcumin treated group, from the top 10 upregulated and top 10 downregulated significantly differentially expressed genes (p < 0.05; fold change ≥ 2 or ≤ -2), there were five upregulated and three downregulated genes involved in the amyloidogenic pathway. While from top 10 upregulated and top 10 downregulated significantly differentially expressed genes (p < 0.05; fold change ≥ 2 or ≤ - 2) in the piperine treated group, there were four upregulated and three downregulated genes involved in the same pathway, whereas there were five upregulated and two downregulated genes involved (p < 0.05; fold change ≥ 2 or ≤ - 2) in the curcumin-piperine combined group. Four genes namely GABARAPL1, CTSB, RAB5 and AK5 were expressed significantly in all groups. Other genes such as ITPR1, GSK3B, PPP3CC, ERN1, APH1A, CYCS and CALM2 were novel putative genes that are involved in the pathogenesis of AD. We revealed that curcumin and piperine have displayed their actions against Aβ via the modulation of various mechanistic pathways. Alterations in expression profiles of genes in the neuronal cell model may explain Aβ pathology post-treatment and provide new insights for remedial approaches of a combined treatment using curcumin and piperine.
Collapse
Affiliation(s)
- Aimi Syamima Abdul Manap
- School of Biosciences, Faculty of Health and Medical Sciences, Taylor’s University, Subang Jaya, Selangor, Malaysia
| | - Priya Madhavan
- School of Medicine, Faculty of Health and Medical Sciences, Taylor’s University, Subang Jaya, Selangor, Malaysia
| | - Shantini Vijayabalan
- School of Pharmacy, Faculty of Health and Medical Sciences, Taylor’s University, Subang Jaya, Selangor, Malaysia
| | - Adeline Chia
- School of Biosciences, Faculty of Health and Medical Sciences, Taylor’s University, Subang Jaya, Selangor, Malaysia
| | - Koji Fukui
- Department of Bioscience and Engineering, College of Systems Engineering and Science, Shibaura Institute of Technology, Saitama, Japan
| |
Collapse
|
26
|
Groener M, Wang Y, Cross E, Tian X, Ebenezer K, Baik E, Pedigo C, Schiffer M, Inoue K, Ishibe S. Identification of Podocyte Cargo Proteins by Proteomic Analysis of Clathrin-Coated Vesicles. KIDNEY360 2020; 1:480-490. [PMID: 35368594 PMCID: PMC8809311 DOI: 10.34067/kid.0000212020] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Accepted: 04/13/2020] [Indexed: 04/20/2023]
Abstract
Background Clathrin-mediated endocytosis (CME) plays a fundamental role in podocyte health. Genetic ablation of genes implicated in CME has been shown to cause severe proteinuria and foot process effacement in mice. However, little is known about the cargo of clathrin-coated vesicles (CCVs) in podocytes. The goal of this study was to isolate CCVs from podocytes and identify their cargo by proteomic analysis. Methods Glomeruli isolated from Podocin-Cre Rosa-DTRflox mouse kidneys were seeded and treated with diphtheria toxin to obtain pure primary podocyte cultures. CCVs were isolated by differential gradient ultracentrifugation, and enrichment of CCVs was assessed by immunoblotting and electron microscopy (EM). Liquid chromatography-mass spectrometry (LC-MS) was performed for proteomic analysis. Proteins with higher abundance than transferrin receptor protein 1 were evaluated for CCV cargo potential against previously published literature. Immunofluorescence staining of identified cargo proteins and CCVs was performed in podocytes for further verification. Results Immunoblotting for multiple protein markers of CME revealed enrichment in the CCV fraction. Enrichment of CCVs among other small vesicles was observed via EM. Proteomics yielded a total of >1200 significant proteins. Multiple-step data analysis revealed 36 CCV-associated proteins, of which 10 represent novel, highly abundant cargo proteins in podocytes. Colocalization of cargo proteins and CCVs on immunostaining was observed. Conclusions Our identification of podocyte CCV cargo proteins helps to elucidate the importance of endocytic trafficking for podocyte health and maintenance of the glomerular environment.
Collapse
Affiliation(s)
- Marwin Groener
- Department of Internal Medicine, Yale University School of Medicine, New Haven, Connecticut
- Department of Nephrology and Hypertension, University Hospital Erlangen, Erlangen, Germany
- Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Erlangen, Germany
| | - Ying Wang
- Department of Internal Medicine, Yale University School of Medicine, New Haven, Connecticut
| | - Elizabeth Cross
- Department of Internal Medicine, Yale University School of Medicine, New Haven, Connecticut
| | - Xuefei Tian
- Department of Internal Medicine, Yale University School of Medicine, New Haven, Connecticut
| | - Karen Ebenezer
- Department of Internal Medicine, Yale University School of Medicine, New Haven, Connecticut
| | - Eunice Baik
- Department of Internal Medicine, Yale University School of Medicine, New Haven, Connecticut
| | - Christopher Pedigo
- Department of Internal Medicine, Yale University School of Medicine, New Haven, Connecticut
| | - Mario Schiffer
- Department of Nephrology and Hypertension, University Hospital Erlangen, Erlangen, Germany
- Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Erlangen, Germany
- Mount Desert Island Biological Laboratories, Salisbury Cove, Maine
| | - Kazunori Inoue
- Department of Internal Medicine, Yale University School of Medicine, New Haven, Connecticut
| | - Shuta Ishibe
- Department of Internal Medicine, Yale University School of Medicine, New Haven, Connecticut
| |
Collapse
|
27
|
Roosen DA, Blauwendraat C, Cookson MR, Lewis PA. DNAJC
proteins and pathways to parkinsonism. FEBS J 2019; 286:3080-3094. [DOI: 10.1111/febs.14936] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2019] [Revised: 03/21/2019] [Accepted: 05/21/2019] [Indexed: 12/12/2022]
Affiliation(s)
- Dorien A. Roosen
- Laboratory of Neurogenetics National Institute on AgingNational Institutes of Health Bethesda MD USA
- School of Pharmacy University of Reading UK
| | - Cornelis Blauwendraat
- Laboratory of Neurogenetics National Institute on AgingNational Institutes of Health Bethesda MD USA
| | - Mark R. Cookson
- Laboratory of Neurogenetics National Institute on AgingNational Institutes of Health Bethesda MD USA
| | - Patrick A. Lewis
- School of Pharmacy University of Reading UK
- Department of Neurodegenerative Disease UCL Institute of Neurology London UK
| |
Collapse
|
28
|
Guzman GA, Guzman RE, Jordan N, Hidalgo P. A Tripartite Interaction Among the Calcium Channel α 1- and β-Subunits and F-Actin Increases the Readily Releasable Pool of Vesicles and Its Recovery After Depletion. Front Cell Neurosci 2019; 13:125. [PMID: 31130843 PMCID: PMC6509170 DOI: 10.3389/fncel.2019.00125] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Accepted: 03/13/2019] [Indexed: 11/13/2022] Open
Abstract
Neurotransmitter release is initiated by the influx of Ca2+via voltage-gated calcium channels. The accessory β-subunit (CaVβ) of these channels shapes synaptic transmission by associating with the pore-forming subunit (CaVα1) and up-regulating presynaptic calcium currents. Besides CaVα1, CaVβ interacts with several partners including actin filaments (F-actin). These filaments are known to associate with synaptic vesicles (SVs) at the presynaptic terminals and support their translocation within different pools, but the role of CaVβ/F-actin association on synaptic transmission has not yet been explored. We here study how CaVβ4, the major calcium channel β isoform in mamalian brain, modifies synaptic transmission in concert with F-actin in cultured hippocampal neurons. We analyzed the effect of exogenous CaVβ4 before and after pharmacological disruption of the actin cytoskeleton and dissected calcium channel-dependent and -independent functions by comparing the effects of the wild-type subunit with the one bearing a double mutation that impairs binding to CaVα1. We found that exogenously expressed wild-type CaVβ4 enhances spontaneous and depolarization-evoked excitatory postsynaptic currents (EPSCs) without altering synaptogenesis. CaVβ4 increases the size of the readily releasable pool (RRP) of SVs at resting conditions and accelerates their recovery after depletion. The enhanced neurotransmitter release induced by CaVβ4 is abolished upon disruption of the actin cytoskeleton. The CaVα1 association-deficient CaVβ4 mutant associates with actin filaments, but neither alters postsynaptic responses nor the time course of the RRP recovery. Furthermore, this mutant protein preserves the ability to increase the RRP size. These results indicate that the interplay between CaVβ4 and F-actin also support the recruitment of SVs to the RRP in a CaVα1-independent manner. Our studies show an emerging role of CaVβ in determining SV maturation toward the priming state and its replenishment after release. We envision that this subunit plays a role in coupling exocytosis to endocytosis during the vesicle cycle.
Collapse
Affiliation(s)
- Gustavo A Guzman
- Institute of Complex Systems 4, Zelluläre Biophysik, Forschungszentrum Jülich, Jülich, Germany
| | - Raul E Guzman
- Institute of Complex Systems 4, Zelluläre Biophysik, Forschungszentrum Jülich, Jülich, Germany
| | - Nadine Jordan
- Institute of Complex Systems 4, Zelluläre Biophysik, Forschungszentrum Jülich, Jülich, Germany
| | - Patricia Hidalgo
- Institute of Complex Systems 4, Zelluläre Biophysik, Forschungszentrum Jülich, Jülich, Germany.,Institute of Biochemistry, Heinrich-Heine University, Düsseldorf, Germany
| |
Collapse
|
29
|
Margaria JP, Ratto E, Gozzelino L, Li H, Hirsch E. Class II PI3Ks at the Intersection between Signal Transduction and Membrane Trafficking. Biomolecules 2019; 9:E104. [PMID: 30884740 PMCID: PMC6468456 DOI: 10.3390/biom9030104] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Revised: 03/01/2019] [Accepted: 03/11/2019] [Indexed: 12/11/2022] Open
Abstract
Phosphorylation of inositol phospholipids by the family of phosphoinositide 3-kinases (PI3Ks) is crucial in controlling membrane lipid composition and regulating a wide range of intracellular processes, which include signal transduction and vesicular trafficking. In spite of the extensive knowledge on class I PI3Ks, recent advances in the study of the three class II PI3Ks (PIK3C2A, PIK3C2B and PIK3C2G) reveal their distinct and non-overlapping cellular roles and localizations. By finely tuning membrane lipid composition in time and space among different cellular compartments, this class of enzymes controls many cellular processes, such as proliferation, survival and migration. This review focuses on the recent developments regarding the coordination of membrane trafficking and intracellular signaling of class II PI3Ks through the confined phosphorylation of inositol phospholipids.
Collapse
Affiliation(s)
- Jean Piero Margaria
- Department of Molecular Biotechnology and Health Sciences, Molecular Biotechnology Center, University of Turin, 10126 Turin, Italy.
| | - Edoardo Ratto
- Department of Molecular Biotechnology and Health Sciences, Molecular Biotechnology Center, University of Turin, 10126 Turin, Italy.
| | - Luca Gozzelino
- Department of Molecular Biotechnology and Health Sciences, Molecular Biotechnology Center, University of Turin, 10126 Turin, Italy.
| | - Huayi Li
- Department of Molecular Biotechnology and Health Sciences, Molecular Biotechnology Center, University of Turin, 10126 Turin, Italy.
| | - Emilio Hirsch
- Department of Molecular Biotechnology and Health Sciences, Molecular Biotechnology Center, University of Turin, 10126 Turin, Italy.
| |
Collapse
|
30
|
Expression of plasma membrane calcium ATPases confers Ca 2+/H + exchange in rodent synaptic vesicles. Sci Rep 2019; 9:4289. [PMID: 30862855 PMCID: PMC6414521 DOI: 10.1038/s41598-019-40557-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Accepted: 02/19/2019] [Indexed: 02/07/2023] Open
Abstract
Ca2+ transport into synaptic vesicles (SVs) at the presynaptic terminals has been proposed to be an important process for regulating presynaptic [Ca2+] during stimulation as well as at rest. However, the molecular identity of the transport system remains elusive. Previous studies have demonstrated that isolated SVs exhibit two distinct Ca2+ transport systems depending on extra-vesicular (cytosolic) pH; one is mediated by a high affinity Ca2+ transporter which is active at neutral pH and the other is mediated by a low affinity Ca2+/H+ antiporter which is maximally active at alkaline pH of 8.5. In addition, synaptic vesicle glycoprotein 2 s (SV2s), a major SV component, have been proposed to contribute to Ca2+ clearance from the presynaptic cytoplasm. Here, we show that at physiological pH, the plasma membrane Ca2+ ATPases (PMCAs) are responsible for both the Ca2+/H+ exchange activity and Ca2+ uptake into SVs. The Ca2+/H+ exchange activity monitored by acidification assay exhibited high affinity for Ca2+ (Km ~ 400 nM) and characteristic divalent cation selectivity for the PMCAs. Both activities were remarkably reduced by PMCA blockers, but not by a blocker of the ATPase that transfers Ca2+ from the cytosol to the lumen of sarcoplasmic endoplasmic reticulum (SERCA) at physiological pH. Furthermore, we rule out the contribution of SV2s, putative Ca2+ transporters on SVs, since both Ca2+/H+ exchange activity and Ca2+ transport were unaffected in isolated vesicles derived from SV2-deficient brains. Finally, using a PMCA1-pHluorin construct that enabled us to monitor cellular distribution and recycling properties in living neurons, we demonstrated that PMCA1-pHluorin localized to intracellular acidic compartments and recycled at presynaptic terminals in an activity-dependent manner. Collectively, our results imply that vesicular PMCAs may play pivotal roles in both presynaptic Ca2+ homeostasis and the modulation of H+ gradient in SVs.
Collapse
|
31
|
Lleó A, Núñez-Llaves R, Alcolea D, Chiva C, Balateu-Paños D, Colom-Cadena M, Gomez-Giro G, Muñoz L, Querol-Vilaseca M, Pegueroles J, Rami L, Lladó A, Molinuevo JL, Tainta M, Clarimón J, Spires-Jones T, Blesa R, Fortea J, Martínez-Lage P, Sánchez-Valle R, Sabidó E, Bayés À, Belbin O. Changes in Synaptic Proteins Precede Neurodegeneration Markers in Preclinical Alzheimer's Disease Cerebrospinal Fluid. Mol Cell Proteomics 2019; 18:546-560. [PMID: 30606734 PMCID: PMC6398205 DOI: 10.1074/mcp.ra118.001290] [Citation(s) in RCA: 119] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Indexed: 01/08/2023] Open
Abstract
A biomarker of synapse loss, an early event in Alzheimer's disease (AD) pathophysiology that precedes neuronal death and symptom onset, would be a much-needed prognostic biomarker. With direct access to the brain interstitial fluid, the cerebrospinal fluid (CSF) is a potential source of synapse-derived proteins. In this study, we aimed to identify and validate novel CSF biomarkers of synapse loss in AD. Discovery: Combining shotgun proteomics of the CSF with an exhaustive search of the literature and public databases, we identified 251 synaptic proteins, from which we selected 22 for further study. Verification: Twelve proteins were discarded because of poor detection by Selected Reaction Monitoring (SRM). We confirmed the specific expression of 9 of the remaining proteins (Calsynytenin-1, GluR2, GluR4, Neurexin-2A, Neurexin-3A, Neuroligin-2, Syntaxin-1B, Thy-1, Vamp-2) at the human synapse using Array Tomography microscopy and biochemical fractionation methods. Exploration: Using SRM, we monitored these 9 synaptic proteins (20 peptides) in a cohort of CSF from cognitively normal controls and subjects in the pre-clinical and clinical AD stages (n = 80). Compared with controls, peptides from 8 proteins were elevated 1.3 to 1.6-fold (p < 0.04) in prodromal AD patients. Validation: Elevated levels of a GluR4 peptide at the prodromal stage were replicated (1.3-fold, p = 0.04) in an independent cohort (n = 60). Moreover, 7 proteins were reduced at preclinical stage 1 (0.6 to 0.8-fold, p < 0.04), a finding that was replicated (0.7 to 0.8-fold, p < 0.05) for 6 proteins in a third cohort (n = 38). In a cross-cohort meta-analysis, 6 synaptic proteins (Calsyntenin-1, GluR4, Neurexin-2A, Neurexin-3A, Syntaxin-1B and Thy-1) were reduced 0.8-fold (p < 0.05) in preclinical AD, changes that precede clinical symptoms and CSF markers of neurodegeneration. Therefore, these proteins could have clinical value for assessing disease progression, especially in preclinical stages of AD.
Collapse
Affiliation(s)
- Alberto Lleó
- From the ‡Memory Unit, Neurology Department, Hospital de la Santa Creu i Sant Pau, 08025 Barcelona, Spain;
- §Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), 28031 Madrid, Spain
| | - Raúl Núñez-Llaves
- §Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), 28031 Madrid, Spain
- ¶Biomedical Research Institute Sant Pau (IIB Sant Pau), 08025Barcelona, Spain
| | - Daniel Alcolea
- From the ‡Memory Unit, Neurology Department, Hospital de la Santa Creu i Sant Pau, 08025 Barcelona, Spain
- §Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), 28031 Madrid, Spain
| | - Cristina Chiva
- ‖Proteomics Unit, Center for Genomics Regulation, Barcelona Institute of Science and Technology, 08003 Barcelona
- **University Pompeu Fabra, 08003 Barcelona
| | | | - Martí Colom-Cadena
- §Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), 28031 Madrid, Spain
- ¶Biomedical Research Institute Sant Pau (IIB Sant Pau), 08025Barcelona, Spain
| | - Gemma Gomez-Giro
- ¶Biomedical Research Institute Sant Pau (IIB Sant Pau), 08025Barcelona, Spain
| | - Laia Muñoz
- §Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), 28031 Madrid, Spain
- ¶Biomedical Research Institute Sant Pau (IIB Sant Pau), 08025Barcelona, Spain
| | - Marta Querol-Vilaseca
- §Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), 28031 Madrid, Spain
- ¶Biomedical Research Institute Sant Pau (IIB Sant Pau), 08025Barcelona, Spain
| | - Jordi Pegueroles
- §Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), 28031 Madrid, Spain
- ¶Biomedical Research Institute Sant Pau (IIB Sant Pau), 08025Barcelona, Spain
| | - Lorena Rami
- ‡‡Alzheimer's Disease and Other Cognitive Disorders Unit, Neurology Department, Hospital Clínic-Institut d'Investigacions Biomediques August Pi i Sunyer (IDIBAPS), 08015 Barcelona, Spain
| | - Albert Lladó
- ‡‡Alzheimer's Disease and Other Cognitive Disorders Unit, Neurology Department, Hospital Clínic-Institut d'Investigacions Biomediques August Pi i Sunyer (IDIBAPS), 08015 Barcelona, Spain
| | - José L Molinuevo
- ‡‡Alzheimer's Disease and Other Cognitive Disorders Unit, Neurology Department, Hospital Clínic-Institut d'Investigacions Biomediques August Pi i Sunyer (IDIBAPS), 08015 Barcelona, Spain
| | - Mikel Tainta
- §§Department of Neurology, Center for Research and Advanced Therapies, CITA-Alzheimer Foundation, 20009 San Sebastian, Spain
- ¶¶Servicio de Neurologia, Organización Sanitaria Integrada Goierri-Alto Urola, Osakidetza, Zumárraga, España
| | - Jordi Clarimón
- §Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), 28031 Madrid, Spain
- ¶Biomedical Research Institute Sant Pau (IIB Sant Pau), 08025Barcelona, Spain
| | - Tara Spires-Jones
- ‖‖Centre for Discovery Brain Sciences and UK Dementia Research Institute, University of Edinburgh EH8 9JZ, UK
| | - Rafael Blesa
- From the ‡Memory Unit, Neurology Department, Hospital de la Santa Creu i Sant Pau, 08025 Barcelona, Spain
- §Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), 28031 Madrid, Spain
| | - Juan Fortea
- From the ‡Memory Unit, Neurology Department, Hospital de la Santa Creu i Sant Pau, 08025 Barcelona, Spain
- §Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), 28031 Madrid, Spain
| | - Pablo Martínez-Lage
- §§Department of Neurology, Center for Research and Advanced Therapies, CITA-Alzheimer Foundation, 20009 San Sebastian, Spain
| | - Raquel Sánchez-Valle
- ‡‡Alzheimer's Disease and Other Cognitive Disorders Unit, Neurology Department, Hospital Clínic-Institut d'Investigacions Biomediques August Pi i Sunyer (IDIBAPS), 08015 Barcelona, Spain
| | - Eduard Sabidó
- ‖Proteomics Unit, Center for Genomics Regulation, Barcelona Institute of Science and Technology, 08003 Barcelona
- **University Pompeu Fabra, 08003 Barcelona
| | - Àlex Bayés
- ***Molecular Physiology of the Synapse Laboratory, Biomedical Research Institute Sant Pau (IIB Sant Pau), 08025, Barcelona, Spain
- ‡‡‡Universitat Autònoma de Barcelona, 08193 Bellaterra (Cerdanyola del Vallès), Spain
| | - Olivia Belbin
- §Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), 28031 Madrid, Spain;
- ¶Biomedical Research Institute Sant Pau (IIB Sant Pau), 08025Barcelona, Spain
| |
Collapse
|
32
|
Zou C, Han C, Zhao M, Yu J, Bai L, Yao Y, Gao S, Cao H, Zheng Z. Change of ranibizumab-induced human vitreous protein profile in patients with proliferative diabetic retinopathy based on proteomics analysis. Clin Proteomics 2018. [PMID: 29541006 PMCID: PMC5844103 DOI: 10.1186/s12014-018-9187-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Background Preoperative treatment of anti-vascular endothelial growth factor (VEGF) agents is extensively used in proliferative diabetic retinopathy (PDR), but the molecular mechanism is not fully understood. The objective of this research is to observe change of protein profile induced by ranibizumab (an anti-VEGF agent) in vitreous humor from PDR patients and reveal the effects of anti-VEGF treatment on PDR. Methods A proteomic method was used to identify differentially expressed proteins in vitreous humor. Untreated PDR patients were defined as PDR group, while those who treated with intravitreal injection of ranibizumab (IVR) were defined as IVR. Gene Ontology (GO) annotation and REACTOME pathways were obtained from DAVID Bioinformatics Resources. Intravitreal level of apolipoprotein C-I (APOC1), serpin peptidase inhibitor clade A member 5 (SERPINA5), tissue inhibitor of metalloproteinases (TIMP2), and keratin 1 (KRT1) were determined by enzyme-linked immuno sorbent assay (ELISA). Results 339 differentially expressed proteins were identified in response to IVR. The most notable GO annotation describes the altered proteins was “innate immune response”. The most notable REACTOME pathway was “platelet degranulation”. ELISA result showed increased level of APOC1, SERPINA5, KRT1 and a decreased level of TIMP2 in PDR group compared with IVR. Conclusions In addition to decreasing VEGF level, ranibizumab is associated with change of human vitreous protein profile in patients with PDR, in which the differential proteins are involved in immune response, platelet degranulation, complement activation etc., suggesting that the effects of VEGF are involved in these signaling pathways. Electronic supplementary material The online version of this article (10.1186/s12014-018-9187-z) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Chen Zou
- 1Department of Ophthalmology, Shanghai General Hospital, Shanghai Key Laboratory of Ocular Fundus Disease, Shanghai Engineering Center for Visual Science and Photomedicine, No. 100 Haining Road, Shanghai, 200080 China
| | - Changjing Han
- 2Department of Ophthalmology, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710004 Shaanxi Province China
| | - Minjie Zhao
- 3Department of Ophthalmology, Yixing People's Hospital, Jiangsu University, No.75 Tongzhenguan Road, Yixing, 214200 Jiangsu China
| | - Jingjing Yu
- Department of Ophthalmology, Changshu the 2nd People's Hospital, Changshu, 215500 Jiangsu China
| | - Lin Bai
- 1Department of Ophthalmology, Shanghai General Hospital, Shanghai Key Laboratory of Ocular Fundus Disease, Shanghai Engineering Center for Visual Science and Photomedicine, No. 100 Haining Road, Shanghai, 200080 China
| | - Yuan Yao
- 5Public Health, Stanford University, Stanford, CA 94305 USA
| | - Shuaixin Gao
- 6National Center for Protein Science Shanghai, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 333 Haike Road, Shanghai, 201210 China
| | - Hui Cao
- 1Department of Ophthalmology, Shanghai General Hospital, Shanghai Key Laboratory of Ocular Fundus Disease, Shanghai Engineering Center for Visual Science and Photomedicine, No. 100 Haining Road, Shanghai, 200080 China
| | - Zhi Zheng
- 1Department of Ophthalmology, Shanghai General Hospital, Shanghai Key Laboratory of Ocular Fundus Disease, Shanghai Engineering Center for Visual Science and Photomedicine, No. 100 Haining Road, Shanghai, 200080 China
| |
Collapse
|
33
|
Milosevic I. Revisiting the Role of Clathrin-Mediated Endoytosis in Synaptic Vesicle Recycling. Front Cell Neurosci 2018; 12:27. [PMID: 29467622 PMCID: PMC5807904 DOI: 10.3389/fncel.2018.00027] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2017] [Accepted: 01/17/2018] [Indexed: 12/11/2022] Open
Abstract
Without robust mechanisms to efficiently form new synaptic vesicles (SVs), the tens to hundreds of SVs typically present at the neuronal synapse would be rapidly used up, even at modest levels of neuronal activity. SV recycling is thus critical for synaptic physiology and proper function of sensory and nervous systems. Yet, more than four decades after it was originally proposed that the SVs are formed and recycled locally at the presynaptic terminals, the mechanisms of endocytic processes at the synapse are heavily debated. Clathrin-mediated endocytosis, a type of endocytosis that capitalizes on the clathrin coat, a number of adaptor and accessory proteins, and the GTPase dynamin, is well understood, while the contributions of clathrin-independent fast endocytosis, kiss-and-run, bulk endocytosis and ultrafast endocytosis are still being evaluated. This review article revisits and summarizes the current knowledge on the SV reformation with a focus on clathrin-mediated endocytosis, and it discusses the modes of SV formation from endosome-like structures at the synapse. Given the importance of this topic, future advances in this active field are expected to contribute to better comprehension of neurotransmission, and to have general implications for neuroscience and medicine.
Collapse
Affiliation(s)
- Ira Milosevic
- Synaptic Vesicle Dynamics Group, European Neuroscience Institute (ENI), University Medical Center Göttingen (UMG), Göttingen, Germany
| |
Collapse
|
34
|
Milovanovic D, De Camilli P. Synaptic Vesicle Clusters at Synapses: A Distinct Liquid Phase? Neuron 2017; 93:995-1002. [PMID: 28279363 DOI: 10.1016/j.neuron.2017.02.013] [Citation(s) in RCA: 80] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Revised: 02/06/2017] [Accepted: 02/06/2017] [Indexed: 11/17/2022]
Abstract
Phase separation in the cytoplasm is emerging as a major principle in intracellular organization. In this process, sets of macromolecules assemble themselves into liquid compartments that are distinct from the surrounding medium but are not delimited by membrane boundaries. Here, we discuss how phase separation, in which a component of one of the two phases is vesicles rather than macromolecules, could underlie the formation of synaptic vesicle (SV) clusters in proximity to presynaptic sites. The organization of SVs into a liquid phase could explain how SVs remain tightly clustered without being stably bound to a scaffold so that they can be efficiently recruited to release site by active zone components.
Collapse
Affiliation(s)
- Dragomir Milovanovic
- Departments of Neuroscience and Cell Biology, Program in Cellular Neuroscience, Neurodegeneration and Repair, Kavli Institute for Neuroscience, Howard Hughes Medical Institute, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Pietro De Camilli
- Departments of Neuroscience and Cell Biology, Program in Cellular Neuroscience, Neurodegeneration and Repair, Kavli Institute for Neuroscience, Howard Hughes Medical Institute, Yale University School of Medicine, New Haven, CT 06520, USA.
| |
Collapse
|
35
|
Zala D, Schlattner U, Desvignes T, Bobe J, Roux A, Chavrier P, Boissan M. The advantage of channeling nucleotides for very processive functions. F1000Res 2017; 6:724. [PMID: 28663786 PMCID: PMC5473427 DOI: 10.12688/f1000research.11561.2] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 07/17/2017] [Indexed: 12/26/2022] Open
Abstract
Nucleoside triphosphate (NTP)s, like ATP (adenosine 5'-triphosphate) and GTP (guanosine 5'-triphosphate), have long been considered sufficiently concentrated and diffusible to fuel all cellular ATPases (adenosine triphosphatases) and GTPases (guanosine triphosphatases) in an energetically healthy cell without becoming limiting for function. However, increasing evidence for the importance of local ATP and GTP pools, synthesised in close proximity to ATP- or GTP-consuming reactions, has fundamentally challenged our view of energy metabolism. It has become evident that cellular energy metabolism occurs in many specialised 'microcompartments', where energy in the form of NTPs is transferred preferentially from NTP-generating modules directly to NTP-consuming modules. Such energy channeling occurs when diffusion through the cytosol is limited, where these modules are physically close and, in particular, if the NTP-consuming reaction has a very high turnover, i.e. is very processive. Here, we summarise the evidence for these conclusions and describe new insights into the physiological importance and molecular mechanisms of energy channeling gained from recent studies. In particular, we describe the role of glycolytic enzymes for axonal vesicle transport and nucleoside diphosphate kinases for the functions of dynamins and dynamin-related GTPases.
Collapse
Affiliation(s)
- Diana Zala
- ESPCI - Paris, PSL Research University, Paris, F-75005, France.,CNRS, UMR8249, Paris, F-75005, France
| | - Uwe Schlattner
- Laboratory of Fundamental and Applied Bioenergetics (LBFA), and SFR Environmental and Systems Biology (BEeSy), U1055, University Grenoble Alpes, Grenoble, 38058, France.,Inserm-U1055, Grenoble, F-38058, France
| | - Thomas Desvignes
- Institute of Neuroscience, University of Oregon, Eugene, OR, 97401, USA
| | - Julien Bobe
- INRA, UR1037 LPGP, Campus de Beaulieu, Rennes, F-35000, France
| | - Aurélien Roux
- Department of Biochemistry, University of Geneva, Geneva, CH-1211, Switzerland.,Swiss National Centre for Competence in Research Programme Chemical Biology, Geneva, CH-1211, Switzerland
| | - Philippe Chavrier
- Institut Curie, Paris, F-75248, France.,PSL Research University, Paris, F-75005, France.,CNRS, UMR144, Paris, F-75248, France
| | - Mathieu Boissan
- Sorbonne Universités, UPMC Univ Paris 06, INSERM, UMRS938, Saint-Antoine Research Center, Paris, F-75012, France.,AP-HP, Hospital Tenon, Service de Biochimie et Hormonologie, Paris, F-75020, France
| |
Collapse
|
36
|
Zala D, Schlattner U, Desvignes T, Bobe J, Roux A, Chavrier P, Boissan M. The advantage of channeling nucleotides for very processive functions. F1000Res 2017; 6:724. [PMID: 28663786 DOI: 10.12688/f1000research.11561.1] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 05/15/2017] [Indexed: 01/01/2023] Open
Abstract
Nucleoside triphosphate (NTP)s, like ATP (adenosine 5'-triphosphate) and GTP (guanosine 5'-triphosphate), have long been considered sufficiently concentrated and diffusible to fuel all cellular ATPases (adenosine triphosphatases) and GTPases (guanosine triphosphatases) in an energetically healthy cell without becoming limiting for function. However, increasing evidence for the importance of local ATP and GTP pools, synthesised in close proximity to ATP- or GTP-consuming reactions, has fundamentally challenged our view of energy metabolism. It has become evident that cellular energy metabolism occurs in many specialised 'microcompartments', where energy in the form of NTPs is transferred preferentially from NTP-generating modules directly to NTP-consuming modules. Such energy channeling occurs when diffusion through the cytosol is limited, where these modules are physically close and, in particular, if the NTP-consuming reaction has a very high turnover, i.e. is very processive. Here, we summarise the evidence for these conclusions and describe new insights into the physiological importance and molecular mechanisms of energy channeling gained from recent studies. In particular, we describe the role of glycolytic enzymes for axonal vesicle transport and nucleoside diphosphate kinases for the functions of dynamins and dynamin-related GTPases.
Collapse
Affiliation(s)
- Diana Zala
- ESPCI - Paris, PSL Research University, Paris, F-75005, France.,CNRS, UMR8249, Paris, F-75005, France
| | - Uwe Schlattner
- Laboratory of Fundamental and Applied Bioenergetics (LBFA), and SFR Environmental and Systems Biology (BEeSy), U1055, University Grenoble Alpes, Grenoble, 38058, France.,Inserm-U1055, Grenoble, F-38058, France
| | - Thomas Desvignes
- Institute of Neuroscience, University of Oregon, Eugene, OR, 97401, USA
| | - Julien Bobe
- INRA, UR1037 LPGP, Campus de Beaulieu, Rennes, F-35000, France
| | - Aurélien Roux
- Department of Biochemistry, University of Geneva, Geneva, CH-1211, Switzerland.,Swiss National Centre for Competence in Research Programme Chemical Biology, Geneva, CH-1211, Switzerland
| | - Philippe Chavrier
- Institut Curie, Paris, F-75248, France.,PSL Research University, Paris, F-75005, France.,CNRS, UMR144, Paris, F-75248, France
| | - Mathieu Boissan
- Sorbonne Universités, UPMC Univ Paris 06, INSERM, UMRS938, Saint-Antoine Research Center, Paris, F-75012, France.,AP-HP, Hospital Tenon, Service de Biochimie et Hormonologie, Paris, F-75020, France
| |
Collapse
|
37
|
γ2 and γ1AP-1 complexes: Different essential functions and regulatory mechanisms in clathrin-dependent protein sorting. Eur J Cell Biol 2017; 96:356-368. [PMID: 28372831 DOI: 10.1016/j.ejcb.2017.03.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2017] [Revised: 03/24/2017] [Accepted: 03/24/2017] [Indexed: 11/20/2022] Open
Abstract
γ2 adaptin is homologous to γ1, but is only expressed in vertebrates while γ1 is found in all eukaryotes. We know little about γ2 functions and their relation to γ1. γ1 is an adaptin of the heterotetrameric AP-1 complexes, which sort proteins in and do form clathrin-coated transport vesicles and they also regulate maturation of early endosomes. γ1 knockout mice develop only to blastocysts and thus γ2 does not compensate γ1-deficiency in development. γ2 has not been classified as a clathrin-coated vesicle adaptor protein in proteome analyses and functions for monomeric γ2 in endosomal protein sorting have been proposed, but adaptin interaction studies suggested formation of heterotetrameric AP-1/γ2 complexes. We detected γ2 at the trans-Golgi network, on peripheral vesicles and identified γ2 clathrin-coated vesicles in mice. Ubiquitous σ1A and tissue-specific σ1B adaptins bind γ2 and γ1. σ1B knockout in mice does not effect γ1/σ1A AP-1 levels, but γ2/σ1A AP-1 levels are increased in brain and adipocytes. Also γ2 is essential in development. In zebrafish AP-1/γ2 and AP-1/γ1 fulfill different, essential functions in brain and the vascular system.
Collapse
|
38
|
Lucarelli S, Delos Santos RC, Antonescu CN. Measurement of Epidermal Growth Factor Receptor-Derived Signals Within Plasma Membrane Clathrin Structures. Methods Mol Biol 2017; 1652:191-225. [PMID: 28791645 DOI: 10.1007/978-1-4939-7219-7_15] [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] [Indexed: 12/23/2022]
Abstract
The epidermal growth factor (EGF) receptor (EGFR) is an important regulator of cell growth, proliferation, survival, migration, and metabolism. EGF binding to EGFR triggers the activation of the receptor's intrinsic kinase activity, in turn eliciting the recruitment of many secondary signaling proteins and activation of downstream signals, such as the activation of phosphatidylinositol-3-kinase (PI3K) and Akt, a process requiring the phosphorylation of Gab1. While the identity of many signals that can be activated by EGFR has been revealed, how the spatiotemporal organization of EGFR signaling within cells controls receptor outcome remains poorly understood. Upon EGF binding at the plasma membrane, EGFR is internalized by clathrin-mediated endocytosis following recruitment to clathrin-coated pits (CCPs). Further, plasma membrane CCPs, but not EGFR internalization, are required for EGF-stimulated Akt phosphorylation. Signaling intermediates such as phosphorylated Gab1, which lead to Akt phosphorylation, are enriched within CCPs upon EGF stimulation. These findings indicate that some plasma membrane CCPs also serve as signaling microdomains required for certain facets of EGFR signaling and are enriched in key EGFR signaling intermediates. Understanding how the spatiotemporal organization of EGFR signals within CCP microdomains controls receptor signaling outcome requires imaging methods that can systematically resolve and analyze the properties of CCPs, EGFR and key signaling intermediates. Here, we describe methods using total internal reflection fluorescence microscopy imaging and analysis to systematically study the enrichment of EGFR and key EGFR-derived signals within CCPs.
Collapse
Affiliation(s)
- Stefanie Lucarelli
- Department of Chemistry and Biology, Ryerson University, 350 Victoria Street, Toronto, ON, Canada, M5B 2K3.,Graduate Program in Molecular Science, Ryerson University, 350 Victoria Street, Toronto, ON, Canada, M5B 2K3
| | - Ralph Christian Delos Santos
- Department of Chemistry and Biology, Ryerson University, 350 Victoria Street, Toronto, ON, Canada, M5B 2K3.,Graduate Program in Molecular Science, Ryerson University, 350 Victoria Street, Toronto, ON, Canada, M5B 2K3
| | - Costin N Antonescu
- Department of Chemistry and Biology, Ryerson University, 350 Victoria Street, Toronto, ON, Canada, M5B 2K3. .,Graduate Program in Molecular Science, Ryerson University, 350 Victoria Street, Toronto, ON, Canada, M5B 2K3. .,Keenan Research Centre for Biomedical Science of St. Michael's Hospital, 30 Bond Street, Toronto, ON, Canada, M5B 1W8.
| |
Collapse
|
39
|
Muenzner J, Traub LM, Kelly BT, Graham SC. Cellular and viral peptides bind multiple sites on the N-terminal domain of clathrin. Traffic 2016; 18:44-57. [PMID: 27813245 PMCID: PMC5182127 DOI: 10.1111/tra.12457] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Revised: 10/31/2016] [Accepted: 10/31/2016] [Indexed: 12/17/2022]
Abstract
Short peptide motifs in unstructured regions of clathrin‐adaptor proteins recruit clathrin to membranes to facilitate post‐Golgi membrane transport. Three consensus clathrin‐binding peptide sequences have been identified and structural studies show that each binds distinct sites on the clathrin heavy chain N‐terminal domain (NTD). A fourth binding site for adaptors on NTD has been functionally identified but not structurally characterised. We have solved high resolution structures of NTD bound to peptide motifs from the cellular clathrin adaptors β2 adaptin and amphiphysin plus a putative viral clathrin adaptor, hepatitis D virus large antigen (HDAg‐L). Surprisingly, with each peptide we observe simultaneous peptide binding at multiple sites on NTD and viral peptides binding to the same sites as cellular peptides. Peptides containing clathrin‐box motifs (CBMs) with the consensus sequence LΦxΦ[DE] bind at the ‘arrestin box’ on NTD, between β‐propeller blades 4 and 5, which had previously been thought to bind a distinct consensus sequence. Further, we structurally define the fourth peptide binding site on NTD, which we term the Royle box. In vitro binding assays show that clathrin is more readily captured by cellular CBMs than by HDAg‐L, and site‐directed mutagenesis confirms that multiple binding sites on NTD contribute to efficient capture by CBM peptides.
Collapse
Affiliation(s)
- Julia Muenzner
- Department of Pathology, University of Cambridge, Cambridge, UK
| | - Linton M Traub
- Department of Cell Biology, University of Pittsburgh School of Medicine, Pittsburgh, PA
| | - Bernard T Kelly
- Cambridge Institute for Medical Research, Department of Clinical Biochemistry, University of Cambridge, Cambridge, UK
| | | |
Collapse
|
40
|
Hinckelmann MV, Virlogeux A, Niehage C, Poujol C, Choquet D, Hoflack B, Zala D, Saudou F. Self-propelling vesicles define glycolysis as the minimal energy machinery for neuronal transport. Nat Commun 2016; 7:13233. [PMID: 27775035 PMCID: PMC5078996 DOI: 10.1038/ncomms13233] [Citation(s) in RCA: 74] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2016] [Accepted: 09/14/2016] [Indexed: 12/21/2022] Open
Abstract
The glycolytic enzyme glyceraldehyde-3-phosphate dehydrogenase (GAPDH) facilitates fast axonal transport in neurons. However, given that GAPDH does not produce ATP, it is unclear whether glycolysis per se is sufficient to propel vesicles. Although many proteins regulating transport have been identified, the molecular composition of transported vesicles in neurons has yet to be fully elucidated. Here we selectively enrich motile vesicles and perform quantitative proteomic analysis. In addition to the expected molecular motors and vesicular proteins, we find an enrichment of all the glycolytic enzymes. Using biochemical approaches and super-resolution microscopy, we observe that most glycolytic enzymes are selectively associated with vesicles and facilitate transport of vesicles in neurons. Finally, we provide evidence that mouse brain vesicles produce ATP from ADP and glucose, and display movement in a reconstituted in vitro transport assay of native vesicles. We conclude that transport of vesicles along microtubules can be autonomous. How neurons produce energy to fuel fast axonal transport is only partially understood. Authors here report that most glycolytic enzymes are enriched in motile vesicles, and such glycolytic machinery can produce ATP autonomously to propel vesicle movement along microtubules in a cell-free assay.
Collapse
Affiliation(s)
- María-Victoria Hinckelmann
- Institut Curie, F-91405 Orsay, France.,CNRS, UMR3306, F-91405 Orsay, France.,Inserm, U1005, F-91405 Orsay, France.,Faculté de Médecine, Univ. Paris Sud11, F-94276 Le Kremlin-Bicêtre, France
| | - Amandine Virlogeux
- Institut Curie, F-91405 Orsay, France.,CNRS, UMR3306, F-91405 Orsay, France.,Inserm, U1005, F-91405 Orsay, France.,Faculté de Médecine, Univ. Paris Sud11, F-94276 Le Kremlin-Bicêtre, France.,Grenoble Institut des Neurosciences, GIN, Univ. Grenoble Alpes, F-38000 Grenoble, France.,Inserm, U1216, F-38000 Grenoble, France
| | - Christian Niehage
- Biotechnology Center, Technische Universität Dresden, D-01307 Dresden, Germany
| | - Christel Poujol
- CNRS, UMR 5297, F-33000 Bordeaux, France.,Interdisciplinary Institute for Neuroscience, IINS, Univ. Bordeaux, F-33077 Bordeaux, France
| | - Daniel Choquet
- CNRS, UMR 5297, F-33000 Bordeaux, France.,Interdisciplinary Institute for Neuroscience, IINS, Univ. Bordeaux, F-33077 Bordeaux, France
| | - Bernard Hoflack
- Biotechnology Center, Technische Universität Dresden, D-01307 Dresden, Germany
| | - Diana Zala
- Institut Curie, F-91405 Orsay, France.,CNRS, UMR3306, F-91405 Orsay, France.,Inserm, U1005, F-91405 Orsay, France
| | - Frédéric Saudou
- Institut Curie, F-91405 Orsay, France.,CNRS, UMR3306, F-91405 Orsay, France.,Inserm, U1005, F-91405 Orsay, France.,Grenoble Institut des Neurosciences, GIN, Univ. Grenoble Alpes, F-38000 Grenoble, France.,Inserm, U1216, F-38000 Grenoble, France.,CHU Grenoble Alpes, F-38000 Grenoble, France
| |
Collapse
|
41
|
Tiveron MC, Beurrier C, Céni C, Andriambao N, Combes A, Koehl M, Maurice N, Gatti E, Abrous DN, Kerkerian-Le Goff L, Pierre P, Cremer H. LAMP5 Fine-Tunes GABAergic Synaptic Transmission in Defined Circuits of the Mouse Brain. PLoS One 2016; 11:e0157052. [PMID: 27272053 PMCID: PMC4896627 DOI: 10.1371/journal.pone.0157052] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2016] [Accepted: 05/24/2016] [Indexed: 11/19/2022] Open
Abstract
LAMP5 is member of the LAMP family of membrane proteins. In contrast to the canonical members of this protein family, LAMP1 and LAMP2, which show widespread expression in many tissues, LAMP 5 is brain specific in mice. In C. elegans, the LAMP5 ortholog UNC-46 has been suggested to act a trafficking chaperone, essential for the correct targeting of the nematode vesicular GABA-transporter UNC-47. We show here that in the mouse brain LAMP5 is expressed in subpopulations of GABAergic forebrain neurons in the striato-nigral system and the olfactory bulb. The protein was present at synaptic terminals, overlapping with the mammalian vesicular GABA-transporter VGAT. In LAMP5-deficient mice localization of the transporter was unaffected arguing against a conserved role in VGAT trafficking. Electrophysiological analyses in mutants showed alterations in short term synaptic plasticity suggesting that LAMP5 is involved in controlling the dynamics of evoked GABAergic transmission. At the behavioral level, LAMP5 mutant mice showed decreased anxiety and deficits in olfactory discrimination. Altogether, this work implicates LAMP5 function in GABAergic neurotransmission in defined neuronal subpopulations.
Collapse
Affiliation(s)
- Marie-Catherine Tiveron
- Aix-Marseille University, Centre National pour la Recherche Scientifique, IBDM, Developmental Biology Institute of Marseille, UMR 7288, 13009, Marseille, France
| | - Corinne Beurrier
- Aix-Marseille University, Centre National pour la Recherche Scientifique, IBDM, Developmental Biology Institute of Marseille, UMR 7288, 13009, Marseille, France
| | - Claire Céni
- Aix-Marseille University, Centre National pour la Recherche Scientifique, IBDM, Developmental Biology Institute of Marseille, UMR 7288, 13009, Marseille, France
| | - Naly Andriambao
- Aix-Marseille University, Centre National pour la Recherche Scientifique, IBDM, Developmental Biology Institute of Marseille, UMR 7288, 13009, Marseille, France
| | - Alexis Combes
- Centre d’Immunologie de Marseille-Luminy, Aix-Marseille Université UM2, Inserm U1104, CNRS UMR7280, 13288, Marseille, France
| | - Muriel Koehl
- Neurogenesis and Physiopathology Group, INSERM U862, NeuroCentre Magendie, 33076, Bordeaux, France
| | - Nicolas Maurice
- Aix-Marseille University, Centre National pour la Recherche Scientifique, IBDM, Developmental Biology Institute of Marseille, UMR 7288, 13009, Marseille, France
| | - Evelina Gatti
- Centre d’Immunologie de Marseille-Luminy, Aix-Marseille Université UM2, Inserm U1104, CNRS UMR7280, 13288, Marseille, France
| | - Dhoher Nora Abrous
- Neurogenesis and Physiopathology Group, INSERM U862, NeuroCentre Magendie, 33076, Bordeaux, France
| | - Lydia Kerkerian-Le Goff
- Aix-Marseille University, Centre National pour la Recherche Scientifique, IBDM, Developmental Biology Institute of Marseille, UMR 7288, 13009, Marseille, France
| | - Philippe Pierre
- Centre d’Immunologie de Marseille-Luminy, Aix-Marseille Université UM2, Inserm U1104, CNRS UMR7280, 13288, Marseille, France
| | - Harold Cremer
- Aix-Marseille University, Centre National pour la Recherche Scientifique, IBDM, Developmental Biology Institute of Marseille, UMR 7288, 13009, Marseille, France
| |
Collapse
|
42
|
Chen SY, Hsu YM, Lin YJ, Huang YC, Chen CJ, Lin WD, Liao WL, Chen YT, Lin WY, Liu YH, Yang JS, Sheu JC, Tsai FJ. Current concepts regarding developmental mechanisms in diabetic retinopathy in Taiwan. Biomedicine (Taipei) 2016; 6:7. [PMID: 27154195 PMCID: PMC4859317 DOI: 10.7603/s40681-016-0007-3] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Accepted: 03/31/2016] [Indexed: 12/15/2022] Open
Abstract
Diabetic retinopathy (DR) is one of the most feared complications of diabetes and is a leading cause of acquired blindness in working adults. The prevalence of undiagnosed diabetes in Taiwan is about 4%, and the annual incidence of T2D (Type 2 Diabetes) in Taiwan is 1.8% following the 1985 WHO criteria. Multiple mechanisms have been shown in T2DR with some signaling pathways, including the polyol pathway, PKC pathway, AGEs pathway, and MAPK pathway. However, the cause of vision loss in diabetic retinopathy is complex and remains incompletely understood. Herein, we try to fully understand the new concepts regarding hyperglycemia-induced biochemical pathways contributing to DR pathophysiology. Our work may be able to provide new strategies for the prevention and treatment of diabetic vascular complications.
Collapse
Affiliation(s)
- Shih-Yin Chen
- Genetics Center, Department of Medical Research, China Medical University Hospital, No. 2 Yuh Der Road, 404, Taichung, Taiwan
- School of Chinese Medicine, China Medical University, 404, Taichung, Taiwan
| | - Yuan-Man Hsu
- Department of Biological Science and Technology, China Medical University, 404, Taichung, Taiwan
| | - Ying-Ju Lin
- Genetics Center, Department of Medical Research, China Medical University Hospital, No. 2 Yuh Der Road, 404, Taichung, Taiwan
- School of Chinese Medicine, China Medical University, 404, Taichung, Taiwan
| | - Yu-Chuen Huang
- Genetics Center, Department of Medical Research, China Medical University Hospital, No. 2 Yuh Der Road, 404, Taichung, Taiwan
- School of Chinese Medicine, China Medical University, 404, Taichung, Taiwan
| | - Chao-Jung Chen
- Genetics Center, Department of Medical Research, China Medical University Hospital, No. 2 Yuh Der Road, 404, Taichung, Taiwan
- School of Chinese Medicine, China Medical University, 404, Taichung, Taiwan
| | - Wei-De Lin
- Genetics Center, Department of Medical Research, China Medical University Hospital, No. 2 Yuh Der Road, 404, Taichung, Taiwan
- School of Chinese Medicine, China Medical University, 404, Taichung, Taiwan
| | - Wen-Lin Liao
- Genetics Center, Department of Medical Research, China Medical University Hospital, No. 2 Yuh Der Road, 404, Taichung, Taiwan
- School of Chinese Medicine, China Medical University, 404, Taichung, Taiwan
| | - Yng-Tay Chen
- Genetics Center, Department of Medical Research, China Medical University Hospital, No. 2 Yuh Der Road, 404, Taichung, Taiwan
- School of Chinese Medicine, China Medical University, 404, Taichung, Taiwan
| | - Wei-Yong Lin
- Genetics Center, Department of Medical Research, China Medical University Hospital, No. 2 Yuh Der Road, 404, Taichung, Taiwan
- School of Chinese Medicine, China Medical University, 404, Taichung, Taiwan
| | - Yu-Huei Liu
- Genetics Center, Department of Medical Research, China Medical University Hospital, No. 2 Yuh Der Road, 404, Taichung, Taiwan
- School of Chinese Medicine, China Medical University, 404, Taichung, Taiwan
| | - Jai-Sing Yang
- Genetics Center, Department of Medical Research, China Medical University Hospital, No. 2 Yuh Der Road, 404, Taichung, Taiwan
| | - Jinn-Chyuan Sheu
- Institute of Biomedical Sciences, National Sun Yat-sen University, 804, Kaohsiung, Taiwan
| | - Fuu-Jen Tsai
- Genetics Center, Department of Medical Research, China Medical University Hospital, No. 2 Yuh Der Road, 404, Taichung, Taiwan.
- School of Chinese Medicine, China Medical University, 404, Taichung, Taiwan.
- Department of Medical Genetics, China Medical University Hospital, 404, Taichung, Taiwan.
| |
Collapse
|
43
|
Chamberland JP, Antonow LT, Dias Santos M, Ritter B. NECAP2 controls clathrin coat recruitment to early endosomes for fast endocytic recycling. J Cell Sci 2016; 129:2625-37. [PMID: 27206861 DOI: 10.1242/jcs.173708] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2015] [Accepted: 05/19/2016] [Indexed: 01/04/2023] Open
Abstract
Endocytic recycling returns receptors to the plasma membrane following internalization and is essential to maintain receptor levels on the cell surface, re-sensitize cells to extracellular ligands and for continued nutrient uptake. Yet, the protein machineries and mechanisms that drive endocytic recycling remain ill-defined. Here, we establish that NECAP2 regulates the endocytic recycling of EGFR and transferrin receptor. Our analysis of the recycling dynamics revealed that NECAP2 functions in the fast recycling pathway that directly returns cargo from early endosomes to the cell surface. In contrast, NECAP2 does not regulate the clathrin-mediated endocytosis of these cargos, the degradation of EGFR or the recycling of transferrin along the slow, Rab11-dependent recycling pathway. We show that protein knockdown of NECAP2 leads to enlarged early endosomes and causes the loss of the clathrin adapter AP-1 from the organelle. Through structure-function analysis, we define the protein-binding interfaces in NECAP2 that are crucial for AP-1 recruitment to early endosomes. Together, our data identify NECAP2 as a pathway-specific regulator of clathrin coat formation on early endosomes for fast endocytic recycling.
Collapse
Affiliation(s)
- John P Chamberland
- Boston University School of Medicine, Biochemistry Department, Boston, MA 02118, USA
| | - Lauren T Antonow
- Boston University School of Medicine, Biochemistry Department, Boston, MA 02118, USA
| | - Michel Dias Santos
- Boston University School of Medicine, Biochemistry Department, Boston, MA 02118, USA
| | - Brigitte Ritter
- Boston University School of Medicine, Biochemistry Department, Boston, MA 02118, USA
| |
Collapse
|
44
|
Au CE, Hermo L, Byrne E, Smirle J, Fazel A, Kearney RE, Smith CE, Vali H, Fernandez-Rodriguez J, Simon PHG, Mandato C, Nilsson T, Bergeron JJM. Compartmentalization of membrane trafficking, glucose transport, glycolysis, actin, tubulin and the proteasome in the cytoplasmic droplet/Hermes body of epididymal sperm. Open Biol 2016; 5:rsob.150080. [PMID: 26311421 PMCID: PMC4554921 DOI: 10.1098/rsob.150080] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Discovered in 1909 by Retzius and described mainly by morphology, the cytoplasmic droplet of sperm (renamed here the Hermes body) is conserved among all mammalian species but largely undefined at the molecular level. Tandem mass spectrometry of the isolated Hermes body from rat epididymal sperm characterized 1511 proteins, 43 of which were localized to the structure in situ by light microscopy and two by quantitative electron microscopy localization. Glucose transporter 3 (GLUT-3) glycolytic enzymes, selected membrane traffic and cytoskeletal proteins were highly abundant and concentrated in the Hermes body. By electron microscope gold antibody labelling, the Golgi trafficking protein TMED7/p27 localized to unstacked flattened cisternae of the Hermes body, as did GLUT-3, the most abundant protein. Its biogenesis was deduced through the mapping of protein expression for all 43 proteins during male germ cell differentiation in the testis. It is at the terminal step 19 of spermiogenesis that the 43 characteristic proteins accumulated in the nascent Hermes body.
Collapse
Affiliation(s)
- Catherine E Au
- Department of Anatomy and Cell Biology, McGill University, Montreal, Quebec, Canada H3A 0C7 Department of Medicine, McGill University Health Centre Research Institute, 1001 Decarie Blvd, Montreal, Quebec, Canada H4A 3J1
| | - Louis Hermo
- Department of Anatomy and Cell Biology, McGill University, Montreal, Quebec, Canada H3A 0C7
| | - Elliot Byrne
- Department of Anatomy and Cell Biology, McGill University, Montreal, Quebec, Canada H3A 0C7 Department of Medicine, McGill University Health Centre Research Institute, 1001 Decarie Blvd, Montreal, Quebec, Canada H4A 3J1
| | - Jeffrey Smirle
- Department of Anatomy and Cell Biology, McGill University, Montreal, Quebec, Canada H3A 0C7 Department of Medicine, McGill University Health Centre Research Institute, 1001 Decarie Blvd, Montreal, Quebec, Canada H4A 3J1
| | - Ali Fazel
- Department of Anatomy and Cell Biology, McGill University, Montreal, Quebec, Canada H3A 0C7 Department of Medicine, McGill University Health Centre Research Institute, 1001 Decarie Blvd, Montreal, Quebec, Canada H4A 3J1
| | - Robert E Kearney
- Department of Biomedical Engineering, McGill University, Montreal, Quebec, Canada H3A 1A1
| | - Charles E Smith
- Department of Anatomy and Cell Biology, McGill University, Montreal, Quebec, Canada H3A 0C7
| | - Hojatollah Vali
- Department of Anatomy and Cell Biology, McGill University, Montreal, Quebec, Canada H3A 0C7
| | - Julia Fernandez-Rodriguez
- Centre for Cellular Imaging, Sahlgrenska Academy at the University of Gothenburg, PO Box 435, 40530 Gothenburg, Sweden
| | - Paul H G Simon
- Department of Anatomy and Cell Biology, McGill University, Montreal, Quebec, Canada H3A 0C7 Department of Medicine, McGill University Health Centre Research Institute, 1001 Decarie Blvd, Montreal, Quebec, Canada H4A 3J1
| | - Craig Mandato
- Department of Anatomy and Cell Biology, McGill University, Montreal, Quebec, Canada H3A 0C7
| | - Tommy Nilsson
- Department of Anatomy and Cell Biology, McGill University, Montreal, Quebec, Canada H3A 0C7 Department of Medicine, McGill University Health Centre Research Institute, 1001 Decarie Blvd, Montreal, Quebec, Canada H4A 3J1
| | - John J M Bergeron
- Department of Anatomy and Cell Biology, McGill University, Montreal, Quebec, Canada H3A 0C7 Department of Medicine, McGill University Health Centre Research Institute, 1001 Decarie Blvd, Montreal, Quebec, Canada H4A 3J1 Royal Victoria Hospital, Center for Translational Biology, RI-MUHC, Glen Site, 1001 Decarie Blvd, Bloc E, Room E02.7210, Montreal, Quebec, Canada H4A 3J1
| |
Collapse
|
45
|
Kito K, Okada M, Ishibashi Y, Okada S, Ito T. A strategy for absolute proteome quantification with mass spectrometry by hierarchical use of peptide-concatenated standards. Proteomics 2016; 16:1457-73. [DOI: 10.1002/pmic.201500414] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2015] [Revised: 02/18/2016] [Accepted: 03/24/2016] [Indexed: 12/20/2022]
Affiliation(s)
- Keiji Kito
- Department of Life Sciences, School of Agriculture; Meiji University; Kawasaki Japan
| | - Mitsuhiro Okada
- Department of Life Sciences, School of Agriculture; Meiji University; Kawasaki Japan
| | - Yuko Ishibashi
- Department of Life Sciences, School of Agriculture; Meiji University; Kawasaki Japan
| | - Satoshi Okada
- Department of Biochemistry; Kyushu University Graduate School of Medical Science; Fukuoka Japan
| | - Takashi Ito
- Department of Biochemistry; Kyushu University Graduate School of Medical Science; Fukuoka Japan
| |
Collapse
|
46
|
Zhou X, Zeng J, Ouyang C, Luo Q, Yu M, Yang Z, Wang H, Shen K, Shi A. A novel bipartite UNC-101/AP-1 μ1 binding signal mediates KVS-4/Kv2.1 somatodendritic distribution inCaenorhabditis elegans. FEBS Lett 2015; 590:76-92. [DOI: 10.1002/1873-3468.12043] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Revised: 11/10/2015] [Accepted: 12/04/2015] [Indexed: 12/13/2022]
Affiliation(s)
- Xin Zhou
- Department of Medical Genetics; School of Basic Medicine and the Collaborative Innovation Center for Brain Science; Tongji Medical College; Huazhong University of Science and Technology; Wuhan Hubei China
| | - Jia Zeng
- Department of Medical Genetics; School of Basic Medicine and the Collaborative Innovation Center for Brain Science; Tongji Medical College; Huazhong University of Science and Technology; Wuhan Hubei China
| | - Chenxi Ouyang
- Department of Vascular Surgery; Union Hospital; Tongji Medical College; Huazhong University of Science and Technology; Wuhan Hubei China
| | - Qianyun Luo
- Department of Medical Genetics; School of Basic Medicine and the Collaborative Innovation Center for Brain Science; Tongji Medical College; Huazhong University of Science and Technology; Wuhan Hubei China
| | - Miao Yu
- Department of Vascular Surgery; Union Hospital; Tongji Medical College; Huazhong University of Science and Technology; Wuhan Hubei China
| | - Zhenrong Yang
- Department of Medical Genetics; School of Basic Medicine and the Collaborative Innovation Center for Brain Science; Tongji Medical College; Huazhong University of Science and Technology; Wuhan Hubei China
| | - Hui Wang
- Department of Medical Genetics; School of Basic Medicine and the Collaborative Innovation Center for Brain Science; Tongji Medical College; Huazhong University of Science and Technology; Wuhan Hubei China
| | - Kang Shen
- Department of Biology; Howard Hughes Medical Institute; Stanford University; Palo Alto CA USA
| | - Anbing Shi
- Department of Medical Genetics; School of Basic Medicine and the Collaborative Innovation Center for Brain Science; Tongji Medical College; Huazhong University of Science and Technology; Wuhan Hubei China
- Institute for Brain Research; Huazhong University of Science and Technology; Wuhan Hubei China
- Key Laboratory of Neurological Disease of National Education Ministry; Tongji Medical College; Huazhong University of Science and Technology; Wuhan Hubei China
| |
Collapse
|
47
|
Robinson MS. Forty Years of Clathrin-coated Vesicles. Traffic 2015; 16:1210-38. [PMID: 26403691 DOI: 10.1111/tra.12335] [Citation(s) in RCA: 246] [Impact Index Per Article: 24.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2015] [Revised: 09/16/2015] [Accepted: 09/16/2015] [Indexed: 12/11/2022]
Abstract
The purification of coated vesicles and the discovery of clathrin by Barbara Pearse in 1975 was a landmark in cell biology. Over the past 40 years, work from many labs has uncovered the molecular details of clathrin and its associated proteins, including how they assemble into a coated vesicle and how they select cargo. Unexpected connections have been found with signalling, development, neuronal transmission, infection, immunity and genetic disorders. But there are still a number of unanswered questions, including how clathrin-mediated trafficking is regulated and how the machinery evolved.
Collapse
Affiliation(s)
- Margaret S Robinson
- Cambridge Institute for Medical Research, University of Cambridge, Cambridge, UK
| |
Collapse
|
48
|
Lehmann M, Gottschalk B, Puchkov D, Schmieder P, Schwagerus S, Hackenberger CPR, Haucke V, Schmoranzer J. Multicolor Caged dSTORM Resolves the Ultrastructure of Synaptic Vesicles in the Brain. Angew Chem Int Ed Engl 2015; 54:13230-5. [DOI: 10.1002/anie.201505138] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2015] [Revised: 08/04/2015] [Indexed: 01/31/2023]
Affiliation(s)
- Martin Lehmann
- Leibniz Institut für Molekulare Pharmakologie (FMP), Robert‐Roessle‐Strasse 10, 13125 Berlin (Germany)
- Freie Universität Berlin, Department of Biochemistry, Takustrasse 6, 14195 Berlin (Germany)
| | - Benjamin Gottschalk
- Leibniz Institut für Molekulare Pharmakologie (FMP), Robert‐Roessle‐Strasse 10, 13125 Berlin (Germany)
| | - Dmytro Puchkov
- Leibniz Institut für Molekulare Pharmakologie (FMP), Robert‐Roessle‐Strasse 10, 13125 Berlin (Germany)
| | - Peter Schmieder
- Leibniz Institut für Molekulare Pharmakologie (FMP), Robert‐Roessle‐Strasse 10, 13125 Berlin (Germany)
| | - Sergej Schwagerus
- Leibniz Institut für Molekulare Pharmakologie (FMP), Robert‐Roessle‐Strasse 10, 13125 Berlin (Germany)
| | - Christian P. R. Hackenberger
- Leibniz Institut für Molekulare Pharmakologie (FMP), Robert‐Roessle‐Strasse 10, 13125 Berlin (Germany)
- Humboldt Universität zu Berlin, Department of Chemistry, Brook‐Taylor‐Strasse. 2, 12489 Berlin (Germany)
| | - Volker Haucke
- Leibniz Institut für Molekulare Pharmakologie (FMP), Robert‐Roessle‐Strasse 10, 13125 Berlin (Germany)
- Freie Universität Berlin, Department of Biochemistry, Takustrasse 6, 14195 Berlin (Germany)
| | - Jan Schmoranzer
- Leibniz Institut für Molekulare Pharmakologie (FMP), Robert‐Roessle‐Strasse 10, 13125 Berlin (Germany)
- Freie Universität Berlin, Department of Biochemistry, Takustrasse 6, 14195 Berlin (Germany)
- Charité ‐ Universitätsmedizin Berlin, Charité Campus Mitte, Virchowweg 6, 10117 Berlin (Germany)
| |
Collapse
|
49
|
Lehmann M, Gottschalk B, Puchkov D, Schmieder P, Schwagerus S, Hackenberger CPR, Haucke V, Schmoranzer J. Multicolor Caged dSTORM Resolves the Ultrastructure of Synaptic Vesicles in the Brain. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201505138] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Martin Lehmann
- Leibniz Institut für Molekulare Pharmakologie (FMP), Robert‐Roessle‐Strasse 10, 13125 Berlin (Germany)
- Freie Universität Berlin, Department of Biochemistry, Takustrasse 6, 14195 Berlin (Germany)
| | - Benjamin Gottschalk
- Leibniz Institut für Molekulare Pharmakologie (FMP), Robert‐Roessle‐Strasse 10, 13125 Berlin (Germany)
| | - Dmytro Puchkov
- Leibniz Institut für Molekulare Pharmakologie (FMP), Robert‐Roessle‐Strasse 10, 13125 Berlin (Germany)
| | - Peter Schmieder
- Leibniz Institut für Molekulare Pharmakologie (FMP), Robert‐Roessle‐Strasse 10, 13125 Berlin (Germany)
| | - Sergej Schwagerus
- Leibniz Institut für Molekulare Pharmakologie (FMP), Robert‐Roessle‐Strasse 10, 13125 Berlin (Germany)
| | - Christian P. R. Hackenberger
- Leibniz Institut für Molekulare Pharmakologie (FMP), Robert‐Roessle‐Strasse 10, 13125 Berlin (Germany)
- Humboldt Universität zu Berlin, Department of Chemistry, Brook‐Taylor‐Strasse. 2, 12489 Berlin (Germany)
| | - Volker Haucke
- Leibniz Institut für Molekulare Pharmakologie (FMP), Robert‐Roessle‐Strasse 10, 13125 Berlin (Germany)
- Freie Universität Berlin, Department of Biochemistry, Takustrasse 6, 14195 Berlin (Germany)
| | - Jan Schmoranzer
- Leibniz Institut für Molekulare Pharmakologie (FMP), Robert‐Roessle‐Strasse 10, 13125 Berlin (Germany)
- Freie Universität Berlin, Department of Biochemistry, Takustrasse 6, 14195 Berlin (Germany)
- Charité ‐ Universitätsmedizin Berlin, Charité Campus Mitte, Virchowweg 6, 10117 Berlin (Germany)
| |
Collapse
|
50
|
Agarwal A, Ayaz A, Samanta L, Sharma R, Assidi M, Abuzenadah AM, Sabanegh E. Comparative proteomic network signatures in seminal plasma of infertile men as a function of reactive oxygen species. Clin Proteomics 2015; 12:23. [PMID: 26321892 PMCID: PMC4552280 DOI: 10.1186/s12014-015-9094-5] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2015] [Accepted: 08/12/2015] [Indexed: 11/24/2022] Open
Abstract
Background Reactive oxygen species (ROS) plays a major role in the pathology of male infertility. It is an independent biomarker of sperm function. Seminal plasma is a natural reservoir of antioxidants responsible for the nourishment, protection, capacitation, and motility of sperm within the female reproductive tract resulting in successful fertilization and implantation of the embryo. A comparative proteomic analysis of seminal plasma proteins from fertile men and infertile men with varying levels of ROS was carried out to identify signature proteins involved in ROS-mediated reproductive dysfunction. Methods A total of 42 infertile men presenting with infertility and 17 proven fertile donors were enrolled in the study. ROS levels were measured in the seminal ejaculates by chemiluminescence assay. Infertile men were subdivided into Low ROS (0–<93 RLU/s/106 sperm; n = 11), Medium ROS (>93–500 RLU/s/106 sperm; n = 17) and High ROS (>500 RLU/s/106 sperm; n = 14) groups and compared with fertile men (4–50 RLU/s/106 sperm). 4 subjects from fertile group and 4 each from the Low, Medium and High ROS were pooled. 1D gel electrophoresis followed by in-gel digestion and LC/MS–MS in a LTQ-Orbitrap Elite hybrid mass spectrometer system was used for proteome analysis. Identification of differentially expressed proteins (DEPs), their cellular localization and involvement in different pathways were examined utilizing bioinformatics tools. Results The results indicate that proteins involved in biomolecule metabolism, protein folding and protein degradation are differentially modulated in all three infertile patient groups in comparison to fertile controls. Membrane metallo-endopeptidase (MME) was uniformly overexpressed (>2 fold) in all infertile groups. Pathway involving 35 focus proteins in post-translational modification of proteins, protein folding (heat shock proteins, molecular chaperones) and developmental disorder was overexpressed in the High ROS group compared with fertile control group. MME was one of the key proteins in the pathway. FAM3D was uniquely expressed in fertile group. Conclusion We have for the first time demonstrated the presence of 35 DEPs of a single pathway that may lead to impairment of sperm function in men with Low, Medium or High ROS levels by altering protein turn over. MME and FAM3D along with ROS levels in the seminal plasma may serve as good markers for diagnosis of male infertility. Electronic supplementary material The online version of this article (doi:10.1186/s12014-015-9094-5) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Ashok Agarwal
- American Center for Reproductive Medicine, Department of Urology, Cleveland Clinic, Cleveland, OH 44195 USA
| | - Ahmet Ayaz
- American Center for Reproductive Medicine, Department of Urology, Cleveland Clinic, Cleveland, OH 44195 USA
| | - Luna Samanta
- American Center for Reproductive Medicine, Department of Urology, Cleveland Clinic, Cleveland, OH 44195 USA ; Department of Zoology, School of Life Sciences, Ravenshaw University, Cuttack, Odisha 751003 India
| | - Rakesh Sharma
- American Center for Reproductive Medicine, Department of Urology, Cleveland Clinic, Cleveland, OH 44195 USA
| | - Mourad Assidi
- Center of Excellence in Genomic Medicine Research, King AbdulAziz University, Jeddah, Saudi Arabia ; KACST Technology Innovation Center in Personalized Medicine at King AbdulAziz University, Jeddah, Saudi Arabia
| | - Adel M Abuzenadah
- Center of Excellence in Genomic Medicine Research, King AbdulAziz University, Jeddah, Saudi Arabia ; KACST Technology Innovation Center in Personalized Medicine at King AbdulAziz University, Jeddah, Saudi Arabia
| | - Edmund Sabanegh
- Department of Urology, Cleveland Clinic, Cleveland, OH 44195 USA
| |
Collapse
|