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Li Y, Wu X, Sheng C, Liu H, Liu H, Tang Y, Liu C, Ding Q, Xie B, Xiao X, Zheng R, Yu Q, Guo Z, Ma J, Wang J, Gao J, Tian M, Wang W, Zhou J, Jiang L, Gu M, Shi S, Paull M, Yang G, Yang W, Landau S, Bao X, Hu X, Liu XS, Xiao T. IGSF8 is an innate immune checkpoint and cancer immunotherapy target. Cell 2024; 187:2703-2716.e23. [PMID: 38657602 DOI: 10.1016/j.cell.2024.03.039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 12/18/2023] [Accepted: 03/26/2024] [Indexed: 04/26/2024]
Abstract
Antigen presentation defects in tumors are prevalent mechanisms of adaptive immune evasion and resistance to cancer immunotherapy, whereas how tumors evade innate immunity is less clear. Using CRISPR screens, we discovered that IGSF8 expressed on tumors suppresses NK cell function by interacting with human KIR3DL2 and mouse Klra9 receptors on NK cells. IGSF8 is normally expressed in neuronal tissues and is not required for cell survival in vitro or in vivo. It is overexpressed and associated with low antigen presentation, low immune infiltration, and worse clinical outcomes in many tumors. An antibody that blocks IGSF8-NK receptor interaction enhances NK cell killing of malignant cells in vitro and upregulates antigen presentation, NK cell-mediated cytotoxicity, and T cell signaling in vivo. In syngeneic tumor models, anti-IGSF8 alone, or in combination with anti-PD1, inhibits tumor growth. Our results indicate that IGSF8 is an innate immune checkpoint that could be exploited as a therapeutic target.
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Affiliation(s)
- Yulong Li
- Shanghai Xunbaihui Biotechnology Co., Ltd., 3rd floor of Building 4, No. 3728, Jinke Road, Pudong New Area, Shanghai, 201203, China
| | - Xiangyang Wu
- Shanghai Xunbaihui Biotechnology Co., Ltd., 3rd floor of Building 4, No. 3728, Jinke Road, Pudong New Area, Shanghai, 201203, China
| | - Caibin Sheng
- GV20 Therapeutics LLC, 237 Putnam Avenue, Cambridge, MA 02139, USA
| | - Hailing Liu
- Shanghai Xunbaihui Biotechnology Co., Ltd., 3rd floor of Building 4, No. 3728, Jinke Road, Pudong New Area, Shanghai, 201203, China
| | - Huizhu Liu
- Shanghai Xunbaihui Biotechnology Co., Ltd., 3rd floor of Building 4, No. 3728, Jinke Road, Pudong New Area, Shanghai, 201203, China
| | - Yixuan Tang
- Shanghai Xunbaihui Biotechnology Co., Ltd., 3rd floor of Building 4, No. 3728, Jinke Road, Pudong New Area, Shanghai, 201203, China
| | - Chao Liu
- Shanghai Xunbaihui Biotechnology Co., Ltd., 3rd floor of Building 4, No. 3728, Jinke Road, Pudong New Area, Shanghai, 201203, China
| | - Qingyang Ding
- Shanghai Xunbaihui Biotechnology Co., Ltd., 3rd floor of Building 4, No. 3728, Jinke Road, Pudong New Area, Shanghai, 201203, China
| | - Bin Xie
- Shanghai Xunbaihui Biotechnology Co., Ltd., 3rd floor of Building 4, No. 3728, Jinke Road, Pudong New Area, Shanghai, 201203, China
| | - Xi Xiao
- Shanghai Xunbaihui Biotechnology Co., Ltd., 3rd floor of Building 4, No. 3728, Jinke Road, Pudong New Area, Shanghai, 201203, China
| | - Rongbin Zheng
- Shanghai Xunbaihui Biotechnology Co., Ltd., 3rd floor of Building 4, No. 3728, Jinke Road, Pudong New Area, Shanghai, 201203, China
| | - Quan Yu
- Shanghai Xunbaihui Biotechnology Co., Ltd., 3rd floor of Building 4, No. 3728, Jinke Road, Pudong New Area, Shanghai, 201203, China
| | - Zengdan Guo
- Shanghai Xunbaihui Biotechnology Co., Ltd., 3rd floor of Building 4, No. 3728, Jinke Road, Pudong New Area, Shanghai, 201203, China
| | - Jian Ma
- Shanghai Xunbaihui Biotechnology Co., Ltd., 3rd floor of Building 4, No. 3728, Jinke Road, Pudong New Area, Shanghai, 201203, China
| | - Jin Wang
- Shanghai Xunbaihui Biotechnology Co., Ltd., 3rd floor of Building 4, No. 3728, Jinke Road, Pudong New Area, Shanghai, 201203, China
| | - Jinghong Gao
- Shanghai Xunbaihui Biotechnology Co., Ltd., 3rd floor of Building 4, No. 3728, Jinke Road, Pudong New Area, Shanghai, 201203, China
| | - Mei Tian
- Shanghai Xunbaihui Biotechnology Co., Ltd., 3rd floor of Building 4, No. 3728, Jinke Road, Pudong New Area, Shanghai, 201203, China
| | - Wei Wang
- Shanghai Xunbaihui Biotechnology Co., Ltd., 3rd floor of Building 4, No. 3728, Jinke Road, Pudong New Area, Shanghai, 201203, China
| | - Jia Zhou
- Shanghai Xunbaihui Biotechnology Co., Ltd., 3rd floor of Building 4, No. 3728, Jinke Road, Pudong New Area, Shanghai, 201203, China
| | - Li Jiang
- Shanghai Xunbaihui Biotechnology Co., Ltd., 3rd floor of Building 4, No. 3728, Jinke Road, Pudong New Area, Shanghai, 201203, China
| | - Mengmeng Gu
- Shanghai Xunbaihui Biotechnology Co., Ltd., 3rd floor of Building 4, No. 3728, Jinke Road, Pudong New Area, Shanghai, 201203, China
| | - Sailing Shi
- Shanghai Xunbaihui Biotechnology Co., Ltd., 3rd floor of Building 4, No. 3728, Jinke Road, Pudong New Area, Shanghai, 201203, China
| | - Michael Paull
- GV20 Therapeutics LLC, 237 Putnam Avenue, Cambridge, MA 02139, USA
| | - Guanhua Yang
- Shanghai Xunbaihui Biotechnology Co., Ltd., 3rd floor of Building 4, No. 3728, Jinke Road, Pudong New Area, Shanghai, 201203, China
| | - Wei Yang
- GV20 Therapeutics LLC, 237 Putnam Avenue, Cambridge, MA 02139, USA
| | - Steve Landau
- GV20 Therapeutics LLC, 237 Putnam Avenue, Cambridge, MA 02139, USA
| | - Xingfeng Bao
- GV20 Therapeutics LLC, 237 Putnam Avenue, Cambridge, MA 02139, USA
| | - Xihao Hu
- GV20 Therapeutics LLC, 237 Putnam Avenue, Cambridge, MA 02139, USA.
| | - X Shirley Liu
- GV20 Therapeutics LLC, 237 Putnam Avenue, Cambridge, MA 02139, USA.
| | - Tengfei Xiao
- Shanghai Xunbaihui Biotechnology Co., Ltd., 3rd floor of Building 4, No. 3728, Jinke Road, Pudong New Area, Shanghai, 201203, China.
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2
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Mabondzo A, Harati R, Broca-Brisson L, Guyot AC, Costa N, Cacciante F, Putignano E, Baroncelli L, Skelton MR, Saab C, Martini E, Benech H, Joudinaud T, Gaillard JC, Armengaud J, Hamoudi R. Dodecyl creatine ester improves cognitive function and identifies key protein drivers including KIF1A and PLCB1 in a mouse model of creatine transporter deficiency. Front Mol Neurosci 2023; 16:1118707. [PMID: 37063368 PMCID: PMC10103630 DOI: 10.3389/fnmol.2023.1118707] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Accepted: 02/20/2023] [Indexed: 04/03/2023] Open
Abstract
Creatine transporter deficiency (CTD), a leading cause of intellectual disability is a result of the mutation in the gene encoding the creatine transporter SLC6A8, which prevents creatine uptake into the brain, causing mental retardation, expressive speech and language delay, autistic-like behavior and epilepsy. Preclinical in vitro and in vivo data indicate that dodecyl creatine ester (DCE) which increases the creatine brain content, might be a therapeutic option for CTD patients. To gain a better understanding of the pathophysiology and DCE treatment efficacy in CTD, this study focuses on the identification of biomarkers related to cognitive improvement in a Slc6a8 knockout mouse model (Slc6a8−/y) engineered to mimic the clinical features of CTD patients which have low brain creatine content. Shotgun proteomics analysis of 4,035 proteins in four different brain regions; the cerebellum, cortex, hippocampus (associated with cognitive functions) and brain stem, and muscle as a control, was performed in 24 mice. Comparison of the protein abundance in the four brain regions between DCE-treated intranasally Slc6a8−/y mice and wild type and DCE-treated Slc6a8−/y and vehicle group identified 14 biomarkers, shedding light on the mechanism of action of DCE. Integrative bioinformatics and statistical modeling identified key proteins in CTD, including KIF1A and PLCB1. The abundance of these proteins in the four brain regions was significantly correlated with both the object recognition and the Y-maze tests. Our findings suggest a major role for PLCB1, KIF1A, and associated molecules in the pathogenesis of CTD.
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Affiliation(s)
- Aloïse Mabondzo
- Université Paris Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé (MTS), Gif sur Yvette, France
- *Correspondence: Aloïse Mabondzo,
| | - Rania Harati
- Department of Pharmacy Practice and Pharmacotherapeutics, College of Pharmacy, University of Sharja, Sharjah, United Arab Emirates
- Sharjah Institute for Medical Research, University of Sharjah, Sharjah, United Arab Emirates
| | - Léa Broca-Brisson
- Université Paris Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé (MTS), Gif sur Yvette, France
| | - Anne-Cécile Guyot
- Université Paris Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé (MTS), Gif sur Yvette, France
| | - Narciso Costa
- Université Paris Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé (MTS), Gif sur Yvette, France
| | | | - Elena Putignano
- Institute of Neuroscience, National Research Council (CNR), Pisa, Italy
| | - Laura Baroncelli
- Institute of Neuroscience, National Research Council (CNR), Pisa, Italy
- Department of Developmental Neuroscience, IRCCS Stella Maris Foundation, Pisa, Italy
| | - Matthew R. Skelton
- Department of Pediatrics, University of Cincinnati College of Medicine and Division of Neurology, Cincinnati Children’s Research Foundation, Cincinnati, OH, United States
| | - Cathy Saab
- Université de Paris and Université Paris Saclay, CEA, Stabilité Génétique Cellules Souches et Radiations, Fontenay aux Roses, France
| | - Emmanuelle Martini
- Université de Paris and Université Paris Saclay, CEA, Stabilité Génétique Cellules Souches et Radiations, Fontenay aux Roses, France
| | | | | | - Jean-Charles Gaillard
- Université Paris Saclay, CEA, Département Médicaments et Technologies pour la Santé (MTS), INRAE, Bagnol sur Cèze, France
| | - Jean Armengaud
- Université Paris Saclay, CEA, Département Médicaments et Technologies pour la Santé (MTS), INRAE, Bagnol sur Cèze, France
| | - Rifat Hamoudi
- Sharjah Institute for Medical Research, University of Sharjah, Sharjah, United Arab Emirates
- Clinical Sciences Department, College of Medicine, University of Sharjah, Sharjah, United Arab Emirates
- Division of Surgery and Interventional Science, University College London, London, United Kingdom
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3
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LaPierre MP, Lawler K, Godbersen S, Farooqi IS, Stoffel M. MicroRNA-7 regulates melanocortin circuits involved in mammalian energy homeostasis. Nat Commun 2022; 13:5733. [PMID: 36175420 PMCID: PMC9522793 DOI: 10.1038/s41467-022-33367-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Accepted: 09/14/2022] [Indexed: 11/09/2022] Open
Abstract
MicroRNAs (miRNAs) modulate physiological responses by repressing the expression of gene networks. We found that global deletion of microRNA-7 (miR-7), the most enriched miRNA in the hypothalamus, causes obesity in mice. Targeted deletion of miR-7 in Single-minded homolog 1 (Sim1) neurons, a critical component of the hypothalamic melanocortin pathway, causes hyperphagia, obesity and increased linear growth, mirroring Sim1 and Melanocortin-4 receptor (MC4R) haplo-insufficiency in mice and humans. We identified Snca (α-Synuclein) and Igsf8 (Immunoglobulin Superfamily Member 8) as miR-7 target genes that act in Sim1 neurons to regulate body weight and endocrine axes. In humans, MIR-7-1 is located in the last intron of HNRNPK, whose promoter drives the expression of both genes. Genetic variants at the HNRNPK locus that reduce its expression are associated with increased height and truncal fat mass. These findings demonstrate that miR-7 suppresses gene networks involved in the hypothalamic melanocortin pathway to regulate mammalian energy homeostasis.
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Affiliation(s)
- Mary P LaPierre
- Institute of Molecular Health Sciences, ETH Zürich, 8093, Zürich, Switzerland
| | - Katherine Lawler
- University of Cambridge Metabolic Research Laboratories and NIHR Cambridge Biomedical Research Centre, Wellcome Trust-MRC Institute of Metabolic Science, Addenbrooke's Hospital, Cambridge, CB2 0QQ, UK
| | - Svenja Godbersen
- Institute of Molecular Health Sciences, ETH Zürich, 8093, Zürich, Switzerland
| | - I Sadaf Farooqi
- University of Cambridge Metabolic Research Laboratories and NIHR Cambridge Biomedical Research Centre, Wellcome Trust-MRC Institute of Metabolic Science, Addenbrooke's Hospital, Cambridge, CB2 0QQ, UK
| | - Markus Stoffel
- Institute of Molecular Health Sciences, ETH Zürich, 8093, Zürich, Switzerland. .,Medical Faculty, University of Zürich, 8091, Zürich, Switzerland.
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4
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Kim J, Wulschner LEG, Oh WC, Ko J. Trans
‐synaptic mechanisms orchestrated by mammalian synaptic cell adhesion molecules. Bioessays 2022; 44:e2200134. [DOI: 10.1002/bies.202200134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Revised: 08/18/2022] [Accepted: 08/31/2022] [Indexed: 11/11/2022]
Affiliation(s)
- Jinhu Kim
- Department of Brain Sciences Daegu Gyeongbuk Institute of Science and Technology (DGIST) Daegu Korea
- Center for Synapse Diversity and Specificity DGIST Daegu Korea
| | | | - Won Chan Oh
- Department of Pharmacology University of Colorado School of Medicine Aurora Colorado USA
| | - Jaewon Ko
- Department of Brain Sciences Daegu Gyeongbuk Institute of Science and Technology (DGIST) Daegu Korea
- Center for Synapse Diversity and Specificity DGIST Daegu Korea
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5
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Podvin S, Jones A, Liu Q, Aulston B, Mosier C, Ames J, Winston C, Lietz CB, Jiang Z, O’Donoghue AJ, Ikezu T, Rissman RA, Yuan SH, Hook V. Mutant Presenilin 1 Dysregulates Exosomal Proteome Cargo Produced by Human-Induced Pluripotent Stem Cell Neurons. ACS OMEGA 2021; 6:13033-13056. [PMID: 34056454 PMCID: PMC8158845 DOI: 10.1021/acsomega.1c00660] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Accepted: 04/16/2021] [Indexed: 05/28/2023]
Abstract
The accumulation and propagation of hyperphosphorylated tau (p-Tau) is a neuropathological hallmark occurring with neurodegeneration of Alzheimer's disease (AD). Extracellular vesicles, exosomes, have been shown to initiate tau propagation in the brain. Notably, exosomes from human-induced pluripotent stem cell (iPSC) neurons expressing the AD familial A246E mutant form of presenilin 1 (mPS1) are capable of inducing tau deposits in the mouse brain after in vivo injection. To gain insights into the exosome proteome cargo that participates in propagating tau pathology, this study conducted proteomic analysis of exosomes produced by human iPSC neurons expressing A246E mPS1. Significantly, mPS1 altered the profile of exosome cargo proteins to result in (1) proteins present only in mPS1 exosomes and not in controls, (2) the absence of proteins in the mPS1 exosomes which were present only in controls, and (3) shared proteins which were upregulated or downregulated in the mPS1 exosomes compared to controls. These results show that mPS1 dysregulates the proteome cargo of exosomes to result in the acquisition of proteins involved in the extracellular matrix and protease functions, deletion of proteins involved in RNA and protein translation systems along with proteasome and related functions, combined with the upregulation and downregulation of shared proteins, including the upregulation of amyloid precursor protein. Notably, mPS1 neuron-derived exosomes displayed altered profiles of protein phosphatases and kinases involved in regulating the status of p-tau. The dysregulation of exosome cargo proteins by mPS1 may be associated with the ability of mPS1 neuron-derived exosomes to propagate tau pathology.
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Affiliation(s)
- Sonia Podvin
- Skaggs
School of Pharmacy and Pharmaceutical Sciences, University of California San Diego,
La Jolla, San Diego 92093, California, United States
| | - Alexander Jones
- Biomedical
Sciences Graduate Program, University of
California, San Diego, La Jolla, San Diego 92093, California, United States
| | - Qing Liu
- Department
of Neurosciences, School of Medicine, University
of California, San Diego, La Jolla, San Diego 92093, California, United States
| | - Brent Aulston
- Department
of Neurosciences, School of Medicine, University
of California, San Diego, La Jolla, San Diego 92093, California, United States
| | - Charles Mosier
- Skaggs
School of Pharmacy and Pharmaceutical Sciences, University of California San Diego,
La Jolla, San Diego 92093, California, United States
| | - Janneca Ames
- Skaggs
School of Pharmacy and Pharmaceutical Sciences, University of California San Diego,
La Jolla, San Diego 92093, California, United States
| | - Charisse Winston
- Department
of Neurosciences, School of Medicine, University
of California, San Diego, La Jolla, San Diego 92093, California, United States
| | - Christopher B. Lietz
- Skaggs
School of Pharmacy and Pharmaceutical Sciences, University of California San Diego,
La Jolla, San Diego 92093, California, United States
| | - Zhenze Jiang
- Skaggs
School of Pharmacy and Pharmaceutical Sciences, University of California San Diego,
La Jolla, San Diego 92093, California, United States
| | - Anthony J. O’Donoghue
- Skaggs
School of Pharmacy and Pharmaceutical Sciences, University of California San Diego,
La Jolla, San Diego 92093, California, United States
| | - Tsuneya Ikezu
- Department
of Pharmacology and Experimental Therapeutics, Department of Neurology,
Alzheimer’s Disease Research Center, Boston University, School of Medicine, Boston 02118, Massachusetts, United States
| | - Robert A. Rissman
- Department
of Neurosciences, School of Medicine, University
of California, San Diego, La Jolla, San Diego 92093, California, United States
- Veterans
Affairs San Diego Healthcare System,
La Jolla, San Diego 92161, California, United States
| | - Shauna H. Yuan
- Department
of Neurosciences, School of Medicine, University
of California, San Diego, La Jolla, San Diego 92093, California, United States
| | - Vivian Hook
- Skaggs
School of Pharmacy and Pharmaceutical Sciences, University of California San Diego,
La Jolla, San Diego 92093, California, United States
- Biomedical
Sciences Graduate Program, University of
California, San Diego, La Jolla, San Diego 92093, California, United States
- Department
of Neurosciences, School of Medicine, University
of California, San Diego, La Jolla, San Diego 92093, California, United States
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Synapse type-specific proteomic dissection identifies IgSF8 as a hippocampal CA3 microcircuit organizer. Nat Commun 2020; 11:5171. [PMID: 33057002 PMCID: PMC7560607 DOI: 10.1038/s41467-020-18956-x] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Accepted: 09/23/2020] [Indexed: 12/20/2022] Open
Abstract
Excitatory and inhibitory neurons are connected into microcircuits that generate circuit output. Central in the hippocampal CA3 microcircuit is the mossy fiber (MF) synapse, which provides powerful direct excitatory input and indirect feedforward inhibition to CA3 pyramidal neurons. Here, we dissect its cell-surface protein (CSP) composition to discover novel regulators of MF synaptic connectivity. Proteomic profiling of isolated MF synaptosomes uncovers a rich CSP composition, including many CSPs without synaptic function and several that are uncharacterized. Cell-surface interactome screening identifies IgSF8 as a neuronal receptor enriched in the MF pathway. Presynaptic Igsf8 deletion impairs MF synaptic architecture and robustly decreases the density of bouton filopodia that provide feedforward inhibition. Consequently, IgSF8 loss impairs excitation/inhibition balance and increases excitability of CA3 pyramidal neurons. Our results provide insight into the CSP landscape and interactome of a specific excitatory synapse and reveal IgSF8 as a critical regulator of CA3 microcircuit connectivity and function. Mossy fiber synapses are key in CA3 microcircuit function. Here, the authors profile the mossy fiber synapse proteome and cell-surface interactome. They uncover a diverse repertoire of cell-surface proteins and identify the receptor IgSF8 as a regulator of CA3 microcircuit connectivity and function.
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Mighty J, Zhou J, Benito-Martin A, Sauma S, Hanna S, Onwumere O, Shi C, Muntzel M, Sauane M, Young M, Molina H, Cox D, Redenti S. Analysis of Adult Neural Retina Extracellular Vesicle Release, RNA Transport and Proteomic Cargo. Invest Ophthalmol Vis Sci 2020; 61:30. [PMID: 32084266 PMCID: PMC7326611 DOI: 10.1167/iovs.61.2.30] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Purpose Extracellular vesicles (EVs) contain RNA and protein cargo reflective of the genotype and phenotype of the releasing cell of origin. Adult neural retina EV release, RNA transfer, and proteomic cargo are the focus of this study. Methods Adult wild-type mouse retinae were cultured and released EV diameters and concentrations quantified using Nanosight. Immunogold transmission electron microscopy (TEM) was used to image EV ultrastructure and marker protein localization. Quantitative real-time polymerase chain reaction (qRT-PCR) was used to analyze retinal cell transcripts present in EVs. Super-resolution microscopy was used to image fluorescent (green) RNA and (red) lipid membrane labeled EVs, released by adult retina, and internalized by isolated retinal cells. Mass spectrometry was used to characterize the proteomes of adult retina and EVs. Results Adult neural retina released EVs at a rate of 1.42 +/- 0.08 × 108/mL over 5 days, with diameters ranging from 30 to 910 nm. The canonical EV markers CD63 and Tsg101 localized to retinal EVs. Adult retinal and neuronal mRNA species present in both retina and EVs included rhodopsin and the neuronal nuclei marker NeuN. Fluorescently labeled RNA in retinal cells was enclosed in EVs, transported to, and uptaken by co-cultured adult retinal cells. Proteomic analysis revealed 1696 protein species detected only in retinal cells, 957 species shared between retina and EVs, and 82 detected only in EVs. Conclusions The adult neural retina constitutively releases EVs with molecular cargo capable of intercellular transport and predicted involvement in biological processes including retinal physiology, mRNA processing, and transcription regulation within the retinal microenvironment.
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8
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Murru L, Moretto E, Martano G, Passafaro M. Tetraspanins shape the synapse. Mol Cell Neurosci 2018; 91:76-81. [DOI: 10.1016/j.mcn.2018.04.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Revised: 03/29/2018] [Accepted: 04/01/2018] [Indexed: 01/01/2023] Open
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Robust gene expression changes in the ganglia following subclinical reactivation in rhesus macaques infected with simian varicella virus. J Neurovirol 2017; 23:520-538. [PMID: 28321697 DOI: 10.1007/s13365-017-0522-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Revised: 02/03/2017] [Accepted: 02/17/2017] [Indexed: 12/20/2022]
Abstract
Varicella zoster virus (VZV) causes varicella during acute infection and establishes latency in the sensory ganglia. Reactivation of VZV results in herpes zoster, a debilitating and painful disease. It is believed that VZV reactivates due to a decline in cell-mediated immunity; however, the roles that CD4 versus CD8 T cells play in the prevention of herpes zoster remain poorly understood. To address this question, we used a well-characterized model of VZV infection where rhesus macaques are intrabronchially infected with the homologous simian varicella virus (SVV). Latently infected rhesus macaques were thymectomized and depleted of either CD4 or CD8 T cells to induce selective senescence of each T cell subset. After T cell depletion, the animals were transferred to a new housing room to induce stress. SVV reactivation (viremia in the absence of rash) was detected in three out of six CD8-depleted and two out of six CD4-depleted animals suggesting that both CD4 and CD8 T cells play a critical role in preventing SVV reactivation. Viral loads in multiple ganglia were higher in reactivated animals compared to non-reactivated animals. In addition, reactivation results in sustained transcriptional changes in the ganglia that enriched to gene ontology and diseases terms associated with neuronal function and inflammation indicative of potential damage as a result of viral reactivation. These studies support the critical role of cellular immunity in preventing varicella virus reactivation and indicate that reactivation results in long-lasting remodeling of the ganglia transcriptome.
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10
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Usardi A, Iyer K, Sigoillot SM, Dusonchet A, Selimi F. The immunoglobulin-like superfamily member IGSF3 is a developmentally regulated protein that controls neuronal morphogenesis. Dev Neurobiol 2016; 77:75-92. [PMID: 27328461 DOI: 10.1002/dneu.22412] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Revised: 06/18/2016] [Accepted: 06/18/2016] [Indexed: 01/06/2023]
Abstract
The establishment of a functional brain depends on the fine regulation and coordination of many processes, including neurogenesis, differentiation, dendritogenesis, axonogenesis, and synaptogenesis. Proteins of the immunoglobulin-like superfamily (IGSF) are major regulators during this sequence of events. Different members of this class of proteins play nonoverlapping functions at specific developmental time-points, as shown in particular by studies of the cerebellum. We have identified a member of the little studied EWI subfamily of IGSF, the protein IGSF3, as a membrane protein expressed in a neuron specific- and time-dependent manner during brain development. In the cerebellum, it is transiently found in membranes of differentiating granule cells, and is particularly concentrated at axon terminals. There it co-localizes with other IGSF proteins with well-known functions in cerebellar development: TAG-1 and L1. Functional analysis shows that IGSF3 controls the differentiation of granule cells, more precisely axonal growth and branching. Biochemical experiments demonstrate that, in the developing brain, IGSF3 is in a complex with the tetraspanin TSPAN7, a membrane protein mutated in several forms of X-linked intellectual disabilities. In cerebellar granule cells, TSPAN7 promotes axonal branching and the size of TSPAN7 clusters is increased by downregulation of IGSF3. Thus IGSF3 is a novel regulator of neuronal morphogenesis that might function through interactions with multiple partners including the tetraspanin TSPAN7. This developmentally regulated protein might thus be at the center of a new signaling pathway controlling brain development. © 2016 Wiley Periodicals, Inc. Develop Neurobiol 77: 75-92, 2017.
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Affiliation(s)
- Alessia Usardi
- Team Mice, Molecules and Synapse Formation, CIRB, Collège de France, CNRS, INSERM, PSL* Research University, Paris, France, 75231, Cedex 05
| | - Keerthana Iyer
- Team Mice, Molecules and Synapse Formation, CIRB, Collège de France, CNRS, INSERM, PSL* Research University, Paris, France, 75231, Cedex 05
| | - Séverine M Sigoillot
- Team Mice, Molecules and Synapse Formation, CIRB, Collège de France, CNRS, INSERM, PSL* Research University, Paris, France, 75231, Cedex 05
| | - Antoine Dusonchet
- Team Mice, Molecules and Synapse Formation, CIRB, Collège de France, CNRS, INSERM, PSL* Research University, Paris, France, 75231, Cedex 05
| | - Fekrije Selimi
- Team Mice, Molecules and Synapse Formation, CIRB, Collège de France, CNRS, INSERM, PSL* Research University, Paris, France, 75231, Cedex 05
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Kähne T, Richter S, Kolodziej A, Smalla KH, Pielot R, Engler A, Ohl FW, Dieterich DC, Seidenbecher C, Tischmeyer W, Naumann M, Gundelfinger ED. Proteome rearrangements after auditory learning: high-resolution profiling of synapse-enriched protein fractions from mouse brain. J Neurochem 2016; 138:124-38. [PMID: 27062398 PMCID: PMC5089584 DOI: 10.1111/jnc.13636] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2015] [Revised: 03/23/2016] [Accepted: 04/01/2016] [Indexed: 01/09/2023]
Abstract
Learning and memory processes are accompanied by rearrangements of synaptic protein networks. While various studies have demonstrated the regulation of individual synaptic proteins during these processes, much less is known about the complex regulation of synaptic proteomes. Recently, we reported that auditory discrimination learning in mice is associated with a relative down-regulation of proteins involved in the structural organization of synapses in various brain regions. Aiming at the identification of biological processes and signaling pathways involved in auditory memory formation, here, a label-free quantification approach was utilized to identify regulated synaptic junctional proteins and phosphoproteins in the auditory cortex, frontal cortex, hippocampus, and striatum of mice 24 h after the learning experiment. Twenty proteins, including postsynaptic scaffolds, actin-remodeling proteins, and RNA-binding proteins, were regulated in at least three brain regions pointing to common, cross-regional mechanisms. Most of the detected synaptic proteome changes were, however, restricted to individual brain regions. For example, several members of the Septin family of cytoskeletal proteins were up-regulated only in the hippocampus, while Septin-9 was down-regulated in the hippocampus, the frontal cortex, and the striatum. Meta analyses utilizing several databases were employed to identify underlying cellular functions and biological pathways. Data are available via ProteomeExchange with identifier PXD003089. How does the protein composition of synapses change in different brain areas upon auditory learning? We unravel discrete proteome changes in mouse auditory cortex, frontal cortex, hippocampus, and striatum functionally implicated in the learning process. We identify not only common but also area-specific biological pathways and cellular processes modulated 24 h after training, indicating individual contributions of the regions to memory processing.
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Affiliation(s)
- Thilo Kähne
- Institute of Experimental Internal Medicine, Medical School, Otto von Guericke University, Magdeburg, Germany
| | - Sandra Richter
- Institute of Experimental Internal Medicine, Medical School, Otto von Guericke University, Magdeburg, Germany
| | - Angela Kolodziej
- Leibniz Institute for Neurobiology (LIN), Magdeburg, Germany.,Institute of Biology, Otto von Guericke University, Magdeburg, Germany
| | - Karl-Heinz Smalla
- Leibniz Institute for Neurobiology (LIN), Magdeburg, Germany.,Center for Behavioral Brain Sciences, Magdeburg, Germany
| | - Rainer Pielot
- Leibniz Institute for Neurobiology (LIN), Magdeburg, Germany
| | | | - Frank W Ohl
- Leibniz Institute for Neurobiology (LIN), Magdeburg, Germany.,Institute of Biology, Otto von Guericke University, Magdeburg, Germany.,Center for Behavioral Brain Sciences, Magdeburg, Germany
| | - Daniela C Dieterich
- Center for Behavioral Brain Sciences, Magdeburg, Germany.,Institute of Pharmacology and Toxicology, Medical School, Otto von Guericke University, Magdeburg, Germany
| | - Constanze Seidenbecher
- Leibniz Institute for Neurobiology (LIN), Magdeburg, Germany.,Center for Behavioral Brain Sciences, Magdeburg, Germany
| | - Wolfgang Tischmeyer
- Leibniz Institute for Neurobiology (LIN), Magdeburg, Germany.,Center for Behavioral Brain Sciences, Magdeburg, Germany
| | - Michael Naumann
- Institute of Experimental Internal Medicine, Medical School, Otto von Guericke University, Magdeburg, Germany
| | - Eckart D Gundelfinger
- Leibniz Institute for Neurobiology (LIN), Magdeburg, Germany.,Center for Behavioral Brain Sciences, Magdeburg, Germany.,Molecular Neuroscience, Medical School, Otto von Guericke University, Magdeburg, Germany.,German Center for Neurodegenerative Diseases, Magdeburg, Germany
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12
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Laßek M, Weingarten J, Volknandt W. The Proteome of the Murine Presynaptic Active Zone. Proteomes 2014; 2:243-257. [PMID: 28250380 PMCID: PMC5302740 DOI: 10.3390/proteomes2020243] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2014] [Revised: 04/09/2014] [Accepted: 04/21/2014] [Indexed: 01/09/2023] Open
Abstract
The proteome of the presynaptic active zone controls neurotransmitter release and the short- and long-term structural and functional dynamics of the nerve terminal. The proteinaceous inventory of the presynaptic active zone has recently been reported. This review will evaluate the subcellular fractionation protocols and the proteomic approaches employed. A breakthrough for the identification of the proteome of the presynaptic active zone was the successful employment of antibodies directed against a cytosolic epitope of membrane integral synaptic vesicle proteins for the immunopurification of synaptic vesicles docked to the presynaptic plasma membrane. Combining immunopurification and subsequent analytical mass spectrometry, hundreds of proteins, including synaptic vesicle proteins, components of the presynaptic fusion and retrieval machinery, proteins involved in intracellular and extracellular signaling and a large variety of adhesion molecules, were identified. Numerous proteins regulating the rearrangement of the cytoskeleton are indicative of the functional and structural dynamics of the presynapse. This review will critically discuss both the experimental approaches and prominent protein candidates identified. Many proteins have not previously been assigned to the presynaptic release sites and may be directly involved in the short- and long-term structural modulation of the presynaptic compartment. The identification of proteinaceous constituents of the presynaptic active zone provides the basis for further analyzing the interaction of presynaptic proteins with their targets and opens novel insights into the functional role of these proteins in neuronal communication.
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Affiliation(s)
- Melanie Laßek
- Institute for Cell Biology and Neuroscience, Department Molecular and Cellular Neurobiology, Max von Laue Str. 13, 60438 Frankfurt am Main, Germany.
| | - Jens Weingarten
- Institute for Cell Biology and Neuroscience, Department Molecular and Cellular Neurobiology, Max von Laue Str. 13, 60438 Frankfurt am Main, Germany.
| | - Walter Volknandt
- Institute for Cell Biology and Neuroscience, Department Molecular and Cellular Neurobiology, Max von Laue Str. 13, 60438 Frankfurt am Main, Germany.
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13
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Weingarten J, Lassek M, Mueller BF, Rohmer M, Lunger I, Baeumlisberger D, Dudek S, Gogesch P, Karas M, Volknandt W. The proteome of the presynaptic active zone from mouse brain. Mol Cell Neurosci 2014; 59:106-18. [PMID: 24534009 DOI: 10.1016/j.mcn.2014.02.003] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2013] [Revised: 02/05/2014] [Accepted: 02/07/2014] [Indexed: 01/07/2023] Open
Abstract
Neurotransmitter release as well as the structural and functional dynamics of the presynaptic active zone is controlled by proteinaceous components. Here we describe for the first time an experimental approach for the isolation of the presynaptic active zone from individual mouse brains, a prerequisite for understanding the functional inventory of the presynaptic protein network and for the later analysis of changes occurring in mutant mice. Using a monoclonal antibody against the ubiquitous synaptic vesicle protein SV2 we immunopurified synaptic vesicles docked to the presynaptic plasma membrane. Enrichment studies by means of Western blot analysis and mass spectrometry identified 485 proteins belonging to an impressive variety of functional categories. Our data suggest that presynaptic active zones represent focal hot spots that are not only involved in the regulation of neurotransmitter release but also in multiple structural and functional alterations the adult nerve terminal undergoes during neural activity in adult CNS. They furthermore open new avenues for characterizing alterations in the active zone proteome of mutant mice and their corresponding controls, including the various mouse models of neurological diseases.
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Affiliation(s)
- Jens Weingarten
- Institute for Cell Biology and Neuroscience, Biologicum, Goethe-University, Frankfurt am Main, Germany
| | - Melanie Lassek
- Institute for Cell Biology and Neuroscience, Biologicum, Goethe-University, Frankfurt am Main, Germany
| | - Benjamin F Mueller
- Institute of Pharmaceutical Chemistry, Cluster of Excellence "Macromolecular Complexes", Goethe-University, Frankfurt am Main, Germany
| | - Marion Rohmer
- Institute of Pharmaceutical Chemistry, Cluster of Excellence "Macromolecular Complexes", Goethe-University, Frankfurt am Main, Germany
| | - Ilaria Lunger
- Institute for Cell Biology and Neuroscience, Biologicum, Goethe-University, Frankfurt am Main, Germany
| | | | - Simone Dudek
- Institute for Cell Biology and Neuroscience, Biologicum, Goethe-University, Frankfurt am Main, Germany
| | - Patricia Gogesch
- Institute for Cell Biology and Neuroscience, Biologicum, Goethe-University, Frankfurt am Main, Germany
| | - Michael Karas
- Institute of Pharmaceutical Chemistry, Cluster of Excellence "Macromolecular Complexes", Goethe-University, Frankfurt am Main, Germany
| | - Walter Volknandt
- Institute for Cell Biology and Neuroscience, Biologicum, Goethe-University, Frankfurt am Main, Germany.
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