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Fenutría R, Martinez VG, Simões I, Postigo J, Gil V, Martínez-Florensa M, Sintes J, Naves R, Cashman KS, Alberola-Ila J, Ramos-Casals M, Soldevila G, Raman C, Merino J, Merino R, Engel P, Lozano F. Transgenic expression of soluble human CD5 enhances experimentally-induced autoimmune and anti-tumoral immune responses. PLoS One 2014; 9:e84895. [PMID: 24454761 PMCID: PMC3893160 DOI: 10.1371/journal.pone.0084895] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2013] [Accepted: 11/28/2013] [Indexed: 12/22/2022] Open
Abstract
CD5 is a lymphoid-specific transmembrane glycoprotein constitutively expressed on thymocytes and mature T and B1a lymphocytes. Current data support the view that CD5 is a negative regulator of antigen-specific receptor-mediated signaling in these cells, and that this would likely be achieved through interaction with CD5 ligand/s (CD5L) of still undefined nature expressed on immune or accessory cells. To determine the functional consequence of loss of CD5/CD5L interaction in vivo, a new transgenic mouse line was generated (shCD5EμTg), expressing a circulating soluble form of human CD5 (shCD5) as a decoy to impair membrane-bound CD5 function. These shCD5EμTg mice showed an enhanced response to autologous antigens, as deduced from the presentation of more severe forms of experimentally inducible autoimmune disease (collagen-induced arthritis, CIA; and experimental autoimmune encephalitis, EAE), as well as an increased anti-tumoral response in non-orthotopic cancer models (B16 melanoma). This enhancement of the immune response was in agreement with the finding of significantly reduced proportions of spleen and lymph node Treg cells (CD4+CD25+FoxP3+), and of peritoneal IL-10-producing and CD5+ B cells, as well as an increased proportion of spleen NKT cells in shCD5EμTg mice. Similar changes in lymphocyte subpopulations were observed in wild-type mice following repeated administration of exogenous recombinant shCD5 protein. These data reveal the relevant role played by CD5/CD5L interactions on the homeostasis of some functionally relevant lymphocyte subpopulations and the modulation of immune responses to autologous antigens.
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Affiliation(s)
- Rafael Fenutría
- Institut d'Investigacions Biomédiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
| | - Vanesa G. Martinez
- Institut d'Investigacions Biomédiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
| | - Inês Simões
- Institut d'Investigacions Biomédiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
| | - Jorge Postigo
- Departamento de Biología Molecular, Universidad de Cantabria, Santander, Spain
| | - Victor Gil
- Servei de Malalties Autoimmunes Sistémiques, Hospital Clínic de Barcelona, Barcelona, Spain
| | | | - Jordi Sintes
- Departament de Biologia Cel·lular, Immunologia i Neurociències, Universitat de Barcelona, Barcelona, Spain
| | - Rodrigo Naves
- Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Kevin S. Cashman
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - José Alberola-Ila
- Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, United States of America
| | - Manel Ramos-Casals
- Servei de Malalties Autoimmunes Sistémiques, Hospital Clínic de Barcelona, Barcelona, Spain
| | - Gloria Soldevila
- Departamento de Inmunología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Distrito Federal, México
| | - Chander Raman
- Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Jesús Merino
- Departamento de Biología Molecular, Universidad de Cantabria, Santander, Spain
| | - Ramón Merino
- Departamento de Biología Molecular, Universidad de Cantabria, Santander, Spain
- Instituto de Biomedicina y Biotecnología de Cantabria, Consejo Superior de Investigaciones Científicas-Universidad de Cantabria-SODERCAN, Santander, Spain
| | - Pablo Engel
- Departament de Biologia Cel·lular, Immunologia i Neurociències, Universitat de Barcelona, Barcelona, Spain
| | - Francisco Lozano
- Institut d'Investigacions Biomédiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
- Departament de Biologia Cel·lular, Immunologia i Neurociències, Universitat de Barcelona, Barcelona, Spain
- Servei d'Immunologia, Hospital Clínic de Barcelona, Barcelona, Spain
- * E-mail:
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Holm D, Fink DR, Grønlund J, Hansen S, Holmskov U. Cloning and characterization of SCART1, a novel scavenger receptor cysteine-rich type I transmembrane molecule. Mol Immunol 2009; 46:1663-72. [DOI: 10.1016/j.molimm.2009.02.016] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2009] [Accepted: 02/13/2009] [Indexed: 12/25/2022]
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