1
|
García-Ferreras R, Osuna-Pérez J, Ramírez-Santiago G, Méndez-Pérez A, Acosta-Moreno AM, Del Campo L, Gómez-Sánchez MJ, Iborra M, Herrero-Fernández B, González-Granado JM, Sánchez-Madrid F, Carrasco YR, Boya P, Martínez-Martín N, Veiga E. Bacteria-instructed B cells cross-prime naïve CD8 + T cells triggering effective cytotoxic responses. EMBO Rep 2023:e56131. [PMID: 37184882 DOI: 10.15252/embr.202256131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Revised: 04/14/2023] [Accepted: 04/25/2023] [Indexed: 05/16/2023] Open
Abstract
In addition to triggering humoral responses, conventional B cells have been described in vitro to cross-present exogenous antigens activating naïve CD8+ T cells. Nevertheless, the way B cells capture these exogenous antigens and the physiological roles of B cell-mediated cross-presentation remain poorly explored. Here, we show that B cells capture bacteria by trans-phagocytosis from previously infected dendritic cells (DC) when they are in close contact. Bacterial encounter "instructs" the B cells to acquire antigen cross-presentation abilities, in a process that involves autophagy. Bacteria-instructed B cells, henceforth referred to as BacB cells, rapidly degrade phagocytosed bacteria, process bacterial antigens and cross-prime naïve CD8+ T cells which differentiate into specific cytotoxic cells that efficiently control bacterial infections. Moreover, a proof-of-concept experiment shows that BacB cells that have captured bacteria expressing tumor antigens could be useful as novel cellular immunotherapies against cancer.
Collapse
Affiliation(s)
- Raquel García-Ferreras
- Department of Molecular & Cellular Biology, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas (CNB-CSIC), Madrid, Spain
| | - Jesús Osuna-Pérez
- Department of Molecular & Cellular Biology, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas (CNB-CSIC), Madrid, Spain
| | - Guillermo Ramírez-Santiago
- Department of Molecular & Cellular Biology, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas (CNB-CSIC), Madrid, Spain
| | - Almudena Méndez-Pérez
- Department of Molecular & Cellular Biology, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas (CNB-CSIC), Madrid, Spain
| | - Andrés M Acosta-Moreno
- Department of Molecular & Cellular Biology, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas (CNB-CSIC), Madrid, Spain
| | - Lara Del Campo
- Department of Molecular & Cellular Biology, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas (CNB-CSIC), Madrid, Spain
- Departamento de Biología Celular, Facultad de Odontología, Universidad Complutense de Madrid, Madrid, Spain
| | - María J Gómez-Sánchez
- Department of Molecular & Cellular Biology, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas (CNB-CSIC), Madrid, Spain
- Department of Immunology, School of Medicine, Complutense University of Madrid, 12 de Octubre Health Research Institute (imas12), Madrid, Spain
| | - Marta Iborra
- Centro de Biología Molecular Severo Ochoa (CSIC-UAM), Madrid, Spain
| | - Beatriz Herrero-Fernández
- LamImSys Lab, Instituto de Investigación Hospital 12 de Octubre (imas12), Madrid, Spain
- Departamento de Fisiología, Facultad de Medicina, Universidad Autónoma de Madrid (UAM), Madrid, Spain
| | - José M González-Granado
- LamImSys Lab, Instituto de Investigación Hospital 12 de Octubre (imas12), Madrid, Spain
- CIBER de Enfermedades Cardiovasculares, Instituto de Salud Carlos III, Madrid, Spain
- Department of Immunology, Ophthalmology and ENT, School of Medicine, Universidad Complutense de Madrid, Madrid, Spain
| | - Francisco Sánchez-Madrid
- LamImSys Lab, Instituto de Investigación Hospital 12 de Octubre (imas12), Madrid, Spain
- Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain
- Hospital Universitario de la Princesa, Instituto Investigación Sanitaria Princesa (IIS-IP), Universidad Autónoma de Madrid, Madrid, Spain
| | - Yolanda R Carrasco
- Department of Immunology & Oncology, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas (CNB-CSIC), Madrid, Spain
| | - Patricia Boya
- Department of Neuroscience, University of Fribourg, Fribourg, Switzerland
| | | | - Esteban Veiga
- Department of Molecular & Cellular Biology, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas (CNB-CSIC), Madrid, Spain
| |
Collapse
|