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Xu Y, Sun Y, Zhu Y, Song G. Structural insight into CD93 recognition by IGFBP7. Structure 2024; 32:282-291.e4. [PMID: 38218180 DOI: 10.1016/j.str.2023.12.011] [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: 07/18/2023] [Revised: 11/28/2023] [Accepted: 12/19/2023] [Indexed: 01/15/2024]
Abstract
The CD93/IGFBP7 axis proteins are key factors expressed in endothelial cells (EC) that mediate EC angiogenesis and migration. Their upregulation contributes to tumor vascular abnormality and a blockade of this interaction promotes a favorable tumor microenvironment for therapeutic interventions. However, the interactions of these proteins with each other remain unclear. In this study, we determined a partial structure of the human CD93-IGFBP7 complex comprising the EGF1 domain of CD93 and the IB domain of IGFBP7. Mutagenesis studies confirmed interactions and specificities. Cellular and mouse tumor studies demonstrated the physiological relevance of the CD93-IGFBP7 interaction in EC angiogenesis. Our study provides leads for the development of therapeutic agents to precisely disrupt unwanted CD93-IGFBP7 signaling in the tumor microenvironment. Additionally, analysis of the CD93 full-length architecture provides insights into how CD93 protrudes on the cell surface and forms a flexible platform for binding to IGFBP7 and other ligands.
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Affiliation(s)
- Yueming Xu
- Shanghai Frontiers Science Center of Genome Editing and Cell Therapy, Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai 200241, China
| | - Yi Sun
- Department of Surgery, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Yuwen Zhu
- Department of Surgery, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA.
| | - Gaojie Song
- Shanghai Frontiers Science Center of Genome Editing and Cell Therapy, Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai 200241, China.
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2
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Xu Y, Sun Y, Zhu Y, Song G. Structural insight into CD93 recognition by IGFBP7. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.06.07.543655. [PMID: 37333140 PMCID: PMC10274810 DOI: 10.1101/2023.06.07.543655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/20/2023]
Abstract
The CD93/IGFBP7 axis are key factors expressed in endothelial cells (EC) that mediate EC angiogenesis and migration. Upregulation of them contributes to tumor vascular abnormality and blockade of this interaction promotes a favorable tumor microenvironment for therapeutic interventions. However, how these two proteins associated to each other remains unclear. In this study, we solved the human CD93-IGFBP7 complex structure to elucidate the interaction between the EGF 1 domain of CD93 and the IB domain of IGFBP7. Mutagenesis studies confirmed the binding interactions and specificities. Cellular and mouse tumor studies demonstrated the physiological relevance of the CD93-IGFBP7 interaction in EC angiogenesis. Our study provides hints for development of therapeutic agents to precisely disrupt unwanted CD93-IGFBP7 signaling in the tumor microenvironment. Additionally, analysis of the CD93 full-length architecture provides insights into how CD93 protrudes on the cell surface and forms a flexible platform for binding to IGFBP7 and other ligands.
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3
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Piani F, Tossetta G, Cara-Fuentes G, Agnoletti D, Marzioni D, Borghi C. Diagnostic and Prognostic Role of CD93 in Cardiovascular Disease: A Systematic Review. Biomolecules 2023; 13:910. [PMID: 37371490 PMCID: PMC10296080 DOI: 10.3390/biom13060910] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Revised: 05/24/2023] [Accepted: 05/25/2023] [Indexed: 06/29/2023] Open
Abstract
INTRODUCTION Cluster of Differentiation (CD) 93 (also known as complement protein 1 q subcomponent receptor C1qR1 or C1qRp) is a transmembrane glycoprotein that can also be present in a soluble (sCD93) form. Recent studies have investigated the role of this protein in cardiovascular disease (CVD). The present systematic review aims to assess the associations between CD93 and cardiovascular (CV) risk factors and disease at both the proteomic and genomic levels. METHODS We conducted systematic searches in the PubMed, EMBASE, and Web of Science databases to identify all human studies since inception to February 2023 that investigated the role of CD93 in CV risk factors, CVD, and CV-associated outcomes. The data collection and analysis have been independently conducted by two reviewers. The search terms included: cardiovascular, heart failure, acute stroke, myocardial infarction, stroke, peripheral artery disease, cardiovascular death, MACE, hypertension, metabolic syndrome, hyperuricemia, diabetes, cd93, c1qr, C1qR1, complement protein 1 q subcomponent receptor. RESULTS A total of 182 references were identified, and 15 studies investigating the associations between CD93 protein levels or CD93 genetic polymorphisms and the development or prevalence of CV risk factors (i.e., hypertension, dyslipidemia, and obesity) and CVD (i.e., heart failure, coronary artery disease, and ischemic stroke) were included. Although promising, the quality and dimension of the analyzed studies do not allow for a definitive answer to the question of whether CD93 may hold diagnostic and prognostic value in CVD.
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Affiliation(s)
- Federica Piani
- Cardiovascular Internal Medicine, IRCCS Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy; (D.A.); (C.B.)
- Department of Medical and Surgical Sciences, University of Bologna, 40138 Bologna, Italy
| | - Giovanni Tossetta
- Department of Experimental and Clinical Medicine, Università Politecnica delle Marche, 60126 Ancona, Italy; (G.T.); (D.M.)
| | - Gabriel Cara-Fuentes
- Division of Pediatric Nephrology, Children’s Hospital Colorado, Aurora, CO 80045, USA;
| | - Davide Agnoletti
- Cardiovascular Internal Medicine, IRCCS Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy; (D.A.); (C.B.)
- Department of Medical and Surgical Sciences, University of Bologna, 40138 Bologna, Italy
| | - Daniela Marzioni
- Department of Experimental and Clinical Medicine, Università Politecnica delle Marche, 60126 Ancona, Italy; (G.T.); (D.M.)
| | - Claudio Borghi
- Cardiovascular Internal Medicine, IRCCS Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy; (D.A.); (C.B.)
- Department of Medical and Surgical Sciences, University of Bologna, 40138 Bologna, Italy
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4
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Washburn RL, Dufour JM. Complementing Testicular Immune Regulation: The Relationship between Sertoli Cells, Complement, and the Immune Response. Int J Mol Sci 2023; 24:ijms24043371. [PMID: 36834786 PMCID: PMC9965741 DOI: 10.3390/ijms24043371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 02/01/2023] [Accepted: 02/03/2023] [Indexed: 02/10/2023] Open
Abstract
Sertoli cells within the testis are instrumental in providing an environment for spermatogenesis and protecting the developing germ cells from detrimental immune responses which could affect fertility. Though these immune responses consist of many immune processes, this review focuses on the understudied complement system. Complement consists of 50+ proteins including regulatory proteins, immune receptors, and a cascade of proteolytic cleavages resulting in target cell destruction. In the testis, Sertoli cells protect the germ cells from autoimmune destruction by creating an immunoregulatory environment. Most studies on Sertoli cells and complement have been conducted in transplantation models, which are effective in studying immune regulation during robust rejection responses. In grafts, Sertoli cells survive activated complement, have decreased deposition of complement fragments, and express many complement inhibitors. Moreover, the grafts have delayed infiltration of immune cells and contain increased infiltration of immunosuppressive regulatory T cells as compared to rejecting grafts. Additionally, anti-sperm antibodies and lymphocyte infiltration have been detected in up to 50% and 30% of infertile testes, respectively. This review seeks to provide an updated overview of the complement system, describe its relationship with immune cells, and explain how Sertoli cells may regulate complement in immunoprotection. Identifying the mechanism Sertoli cells use to protect themselves and germ cells against complement and immune destruction is relevant for male reproduction, autoimmunity, and transplantation.
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Affiliation(s)
- Rachel L Washburn
- Immunology and Infectious Diseases, Graduate School of Biomedical Sciences, Texas Tech University Health Sciences Center, Lubbock, TX 79424, USA
- Department of Cell Biology and Biochemistry, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, TX 79424, USA
| | - Jannette M Dufour
- Department of Cell Biology and Biochemistry, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, TX 79424, USA
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Graham MK, Chikarmane R, Wang R, Vaghasia A, Gupta A, Zheng Q, Wodu B, Pan X, Castagna N, Liu J, Meyers J, Skaist A, Wheelan S, Simons BW, Bieberich C, Nelson WG, DeWeese TL, De Marzo AM, Yegnasubramanian S. Single-cell atlas of epithelial and stromal cell heterogeneity by lobe and strain in the mouse prostate. Prostate 2023; 83:286-303. [PMID: 36373171 DOI: 10.1002/pros.24460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Accepted: 10/11/2022] [Indexed: 11/16/2022]
Abstract
BACKGROUND Evaluating the complex interplay of cell types in the tissue microenvironment is critical to understanding the origin and progression of diseases in the prostate and potential opportunities for intervention. Mouse models are an essential tool to investigate the molecular and cell-type-specific contributions of prostate disease at an organismal level. While there are well-documented differences in the extent, timing, and nature of disease development in various genetically engineered and exposure-based mouse models in different mouse strains and prostate lobes within each mouse strain, the underlying molecular phenotypic differences in cell types across mouse strains and prostate lobes are incompletely understood. METHODS In this study, we used single-cell RNA-sequencing (scRNA-seq) methods to assess the single-cell transcriptomes of 6-month-old mouse prostates from two commonly used mouse strains, friend virus B/NIH jackson (FVB/NJ) (N = 2) and C57BL/6J (N = 3). For each mouse, the lobes of the prostate were dissected (anterior, dorsal, lateral, and ventral), and individual scRNA-seq libraries were generated. In situ and pathological analyses were used to explore the spatial and anatomical distributions of novel cell types and molecular markers defining these cell types. RESULTS Data dimensionality reduction and clustering analysis of scRNA-seq data revealed that basal and luminal cells possessed strain-specific transcriptomic differences, with luminal cells also displaying marked lobe-specific differences. Gene set enrichment analysis comparing luminal cells by strain showed enrichment of proto-Oncogene targets in FVB/NJ mice. Additionally, three rare populations of epithelial cells clustered independently of strain and lobe: one population of luminal cells expressing Foxi1 and components of the vacuolar ATPase proton pump (Atp6v0d2 and Atp6v1g3), another population expressing Psca and other stem cell-associated genes (Ly6a/Sca-1, Tacstd2/Trop-2), and a neuroendocrine population expressing Chga, Chgb, and Syp. In contrast, stromal cell clusters, including fibroblasts, smooth muscle cells, endothelial cells, pericytes, and immune cell types, were conserved across strain and lobe, clustering largely by cell type and not by strain or lobe. One notable exception to this was the identification of two distinct fibroblast populations that we term subglandular fibroblasts and interstitial fibroblasts based on their strikingly distinct spatial distribution in the mouse prostate. CONCLUSIONS Altogether, these data provide a practical reference of the transcriptional profiles of mouse prostate from two commonly used mouse strains and across all four prostate lobes.
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Affiliation(s)
- Mindy K Graham
- Department of Radiation Oncology and Molecular Radiation Sciences, Johns Hopkins University, Baltimore, Maryland, USA
- School of Medicine, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, Maryland, USA
| | - Roshan Chikarmane
- School of Medicine, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, Maryland, USA
| | - Rulin Wang
- School of Medicine, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, Maryland, USA
| | - Ajay Vaghasia
- School of Medicine, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, Maryland, USA
| | - Anuj Gupta
- School of Medicine, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, Maryland, USA
| | - Qizhi Zheng
- Department of Pathology, School of Medicine, Johns Hopkins University, Baltimore, Maryland, USA
| | - Bulouere Wodu
- School of Medicine, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, Maryland, USA
| | - Xin Pan
- Department of Neurology, School of Medicine, Johns Hopkins University, Baltimore, Maryland, USA
| | - Nicole Castagna
- School of Medicine, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, Maryland, USA
| | - Jianyong Liu
- School of Medicine, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, Maryland, USA
| | - Jennifer Meyers
- School of Medicine, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, Maryland, USA
| | - Alyza Skaist
- School of Medicine, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, Maryland, USA
| | - Sarah Wheelan
- School of Medicine, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, Maryland, USA
| | - Brian W Simons
- Center for Comparative Medicine, Baylor College of Medicine, Houston, Texas, USA
| | - Charles Bieberich
- Department of Biological Sciences, University of Maryland at Baltimore County, Baltimore, Maryland, USA
| | - William G Nelson
- School of Medicine, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, Maryland, USA
- Department of Pathology, School of Medicine, Johns Hopkins University, Baltimore, Maryland, USA
| | - Theodore L DeWeese
- Department of Radiation Oncology and Molecular Radiation Sciences, Johns Hopkins University, Baltimore, Maryland, USA
- School of Medicine, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, Maryland, USA
| | - Angelo M De Marzo
- School of Medicine, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, Maryland, USA
- Department of Pathology, School of Medicine, Johns Hopkins University, Baltimore, Maryland, USA
| | - Srinivasan Yegnasubramanian
- Department of Radiation Oncology and Molecular Radiation Sciences, Johns Hopkins University, Baltimore, Maryland, USA
- School of Medicine, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, Maryland, USA
- Department of Pathology, School of Medicine, Johns Hopkins University, Baltimore, Maryland, USA
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Nativel B, Ramin-Mangata S, Mevizou R, Figuester A, Andries J, Iwema T, Ikewaki N, Gasque P, Viranaïcken W. CD93 is a cell surface lectin receptor involved in the control of the inflammatory response stimulated by exogenous DNA. Immunology 2019; 158:85-93. [PMID: 31335975 DOI: 10.1111/imm.13100] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Revised: 07/11/2019] [Accepted: 07/11/2019] [Indexed: 01/08/2023] Open
Abstract
Bacterial DNA contains CpG oligonucleotide (ODN) motifs to trigger innate immune responses through the endosomal receptor Toll-like receptor 9 (TLR9). One of the cell surface receptors to capture and deliver microbial DNA to intracellular TLR9 is the C-type lectin molecule DEC-205 through its N-terminal C-type lectin-like domain (CTLD). CD93 is a cell surface protein and member of the lectin group XIV with a CTLD. We hypothesized that CD93 could interact with CpG motifs, and possibly serve as a novel receptor to deliver bacterial DNA to endosomal TLR9. Using ELISA and tryptophan fluorescence binding studies we observed that the soluble histidine-tagged CD93-CTLD was specifically binding to CpG ODN and bacterial DNA. Moreover, we found that CpG ODN could bind to CD93-expressing IMR32 neuroblastoma cells and induced more robust interleukin-6 secretion when compared with mock-transfected IMR32 control cells. Our data argue for a possible contribution of CD93 to control cell responsiveness to bacterial DNA in a manner reminiscent of DEC-205. We postulate that CD93 may act as a receptor at plasma membrane for DNA or CpG ODN and to grant delivery to endosomal TLR9.
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Affiliation(s)
- Brice Nativel
- GRI, Groupe de recherche en immunopathologie, EA4517, Université de la Réunion, Saint-Denis, France.,Université de La Réunion, INSERM 1188, Diabète athérothombose Réunion Océan Indien (DéTROI), Saint-Denis de La Réunion, France
| | - Stéphane Ramin-Mangata
- GRI, Groupe de recherche en immunopathologie, EA4517, Université de la Réunion, Saint-Denis, France.,Université de La Réunion, INSERM 1188, Diabète athérothombose Réunion Océan Indien (DéTROI), Saint-Denis de La Réunion, France
| | - Rudy Mevizou
- GRI, Groupe de recherche en immunopathologie, EA4517, Université de la Réunion, Saint-Denis, France
| | - Audrey Figuester
- GRI, Groupe de recherche en immunopathologie, EA4517, Université de la Réunion, Saint-Denis, France
| | - Jessica Andries
- GRI, Groupe de recherche en immunopathologie, EA4517, Université de la Réunion, Saint-Denis, France
| | - Thomas Iwema
- GRI, Groupe de recherche en immunopathologie, EA4517, Université de la Réunion, Saint-Denis, France
| | - Nobunao Ikewaki
- Laboratories of Clinical Immunology, Department of Animal Pharmaceutical Science, Welfare School of Pharmaceutical Sciences, Kyushu University of Health, Miyazaki, Japan
| | - Philippe Gasque
- GRI, Groupe de recherche en immunopathologie, EA4517, Université de la Réunion, Saint-Denis, France.,Université de La Réunion, INSERM 1187, CNRS, 9192, IRD 249, UM 134 Processus Infectieux en Milieu Insulaire Tropical (PIMIT), Saint-Denis de La Réunion, France.,Laboratoire d'Immunologie Clinique et Expérimentale, ZOI (LICE-OI). CHU site Bellepierre, Saint-Denis de La Réunion, France
| | - Wildriss Viranaïcken
- GRI, Groupe de recherche en immunopathologie, EA4517, Université de la Réunion, Saint-Denis, France.,Université de La Réunion, INSERM 1187, CNRS, 9192, IRD 249, UM 134 Processus Infectieux en Milieu Insulaire Tropical (PIMIT), Saint-Denis de La Réunion, France
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7
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Griffiths MR, Botto M, Morgan BP, Neal JW, Gasque P. CD93 regulates central nervous system inflammation in two mouse models of autoimmune encephalomyelitis. Immunology 2018; 155:346-355. [PMID: 29923617 DOI: 10.1111/imm.12974] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Revised: 05/23/2018] [Accepted: 06/13/2018] [Indexed: 01/10/2023] Open
Abstract
Microglia and non-professional immune cells (endothelial cells, neurons) participate in the recognition and removal of pathogens and tissue debris in the injured central nervous system through major pro-inflammatory processes. However, the mechanisms involved in regulating these responses remain ill-characterized. We herein show that CD93, also known as complement C1qRp/AA4 stem cell marker, has an important role in the regulation of inflammatory processes. The role of CD93 was evaluated in two models of neuroinflammation. We used the MOG-experimental autoimmune encephalomyelitis (EAE) model and the antibody-dependent EAE (ADEAE), which were induced in wild-type and CD93 knockout mice. We found that CD93 was highly expressed by neurons, endothelial cells and microglia (ramified >> amoeboid). Astrocytes and oligodendrocytes did not to express CD93. We further observed that CD93-deficient (CD93-/- ) mice presented a more robust brain and spinal cord inflammation in EAE and ADEAE. Encephalitis in CD93-/- was characterized by increased numbers of infiltrating M1 macrophages (CD11c+ CD206- ) and amoeboid microglia exhibiting a more activated phenotype (Tomato Lectinhigh Cox2high ). Damage to and leakage through the blood-brain barrier was increased in CD93-/- animals and was associated with a more robust neuronal injury when compared with wild-type EAE mice. We propose that CD93 is an important neuro-immune regulator to control central nervous system inflammation.
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Affiliation(s)
- Mark R Griffiths
- BIIG, Brain Inflammation and Immunity Group, Cardiff University School of Medicine, Cardiff, UK
| | - Marina Botto
- Centre for Complement and Inflammation Research, Department of Medicine, Imperial College, London, UK
| | - Bryan Paul Morgan
- Complement Biology Group, Institute of Infection and Immunity, Cardiff University School of Medicine, Cardiff, UK
| | - James W Neal
- Neuropathology Department, Cardiff University School of Medicine, Cardiff, UK
| | - Philippe Gasque
- BIIG, Brain Inflammation and Immunity Group, Cardiff University School of Medicine, Cardiff, UK.,GRI EA4517, Immunopathology and infectious disease grouping, CHU, CYROI, Université de La Réunion, Sainte-Clotilde, La Réunion, France.,CNRS 9192, INSERM U1187, IRD 249, Unité Mixte Processus Infectieux en Milieu Insulaire Tropical (PIMIT), Plateforme Technologique CYROI, Université de La Réunion, Sainte-Clotilde, La Réunion, France.,Laboratoire de Biologie, secteur : Laboratoire d'immunologie clinique et expérimentale ZOI (LICE OI), CHU La Réunion site Félix Guyon, St Denis, La Réunion, France
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