SARS-CoV-2 membrane protein-specific antibodies from critically ill SARS-CoV-2-infected individuals interact with Fc receptor-expressing cells but do not neutralize the virus.
J Leukoc Biol
; 115(5): 985-991, 2024 04 29.
Article
en En
| MEDLINE
| ID: mdl-38245016
ABSTRACT
The membrane (M) glycoprotein of SARS-CoV-2 is one of the key viral proteins regulating virion assembly and morphogenesis. Immunologically, the M protein is a major source of peptide antigens driving T cell responses, and most individuals who have been infected with SARS-CoV-2 make antibodies to the N-terminal, surface-exposed peptide of the M protein. We now report that although the M protein is abundant in the viral particle, antibodies to the surface-exposed N-terminal epitope of M do not appear to neutralize the virus. M protein-specific antibodies do, however, activate antibody-dependent cell-mediated cytotoxicity and cytokine secretion by primary human natural killer cells. Interestingly, while patients with severe or mild disease make comparable levels of M antigen-binding antibodies, M-specific antibodies from the serum of critically ill patients are significantly more potent activators of antibody-dependent cell-mediated cytotoxicity than antibodies found in individuals with mild or asymptomatic infection.
Palabras clave
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Células Asesinas Naturales
/
Enfermedad Crítica
/
SARS-CoV-2
/
COVID-19
/
Anticuerpos Antivirales
/
Citotoxicidad Celular Dependiente de Anticuerpos
Límite:
Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
Revista:
J Leukoc Biol
Año:
2024
Tipo del documento:
Article
País de afiliación:
España