Development of multi-epitope peptide-based vaccines against SARS-CoV-2

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has caused a pandemic involving so far more than 15 million infections and 630,211 deaths. Effective vaccines are urgently needed to prevent SARS-CoV-2 infections. No vaccines have yet been approved for licensure by regulatory agencies. Even though host immune responses to SARS-CoV-2 infections are beginning to be unravelled, effective clearance of virus will depend on both humoral and cellular immunity. Additionally, the presence of Spike (S)-glycoprotein reactive CD4þ T-cells in the majority of convalescent patients is consistent with its significant role in stimulating B and CD8þ T-cells. The search for immunodominant epitopes relies on experimental evaluation of peptides representing the epitopes from overlapping peptide libraries which can be costly and labor-intensive. Recent advancements in B- and T-cell epitope predictions by bioinformatic analysis have led to epitope identifications. Assessing which peptide epitope can induce potent neutralizing antibodies and robust Tcell responses is a prerequisite for the selection of effective epitopes to be incorporated in peptide-based vaccines. This review discusses the roles of B- and T-cells in SARS-CoV-2 infections and experimental validations for the selection of B-, CD4þ and CD8þ T-cell epitopes which could lead to the construction of a multi-epitope peptide vaccine. Peptidebased vaccines are known for their low immunogenicity which could be overcome by incorporating immunostimulatory adjuvants and nanoparticles such as Poly Lactic-coGlycolic Acid (PLGA) or chitosan.

• Tipo de recurso: Article of investigation
• Fecha de publicación: 2020
• Institución: Universidad de Bogotá Jorge Tadeo Lozano
• Repositorio: Expeditio: repositorio UTadeo
• Idioma: eng
• OAI Identifier: oai:expeditiorepositorio.utadeo.edu.co:20.500.12010/15616
• Acceso en línea: https://doi.org/10.1016/j.bj.2020.09.005; http://hdl.handle.net/20.500.12010/15616
• Palabra clave: SARS-CoV-2; CD4þ T-cell; CD8þ T-cell; B-cell; Epitopes; COVID-19 (Enfermedad); Infecciones por coronavirus; Vacunas - Pruebas
• License: Abierto (Texto Completo)