Fc gamma receptor IIa suppresses type I and III interferon production by human myeloid immune cells.
Eur J Immunol
; 48(11): 1796-1809, 2018 11.
Article
en En
| MEDLINE
| ID: mdl-30184252
ABSTRACT
Type I and type III interferons (IFNs) are fundamental for antiviral immunity, but prolonged expression is also detrimental to the host. Therefore, upon viral infection high levels of type I and III IFNs are followed by a strong and rapid decline. However, the mechanisms responsible for this suppression are still largely unknown. Here, we show that IgG opsonization of model viruses influenza and respiratory syncytial virus (RSV) strongly and selectively suppressed type I and III IFN production by various human antigen-presenting cells. This suppression was induced by selective inhibition of TLR, RIG-I-like receptor, and STING-dependent type I and III IFN gene transcription. Surprisingly, type I and III IFN suppression was mediated by Syk and PI3K independent inhibitory signaling via FcγRIIa, thereby identifying a novel non-canonical FcγRIIa pathway in myeloid cells. Together, these results indicate that IgG opsonization of viruses functions as a novel negative feedback mechanism in humans, which may play a role in the selective suppression of type I and III IFN responses during the late-phase of viral infections. In addition, activation of this pathway may be used as a tool to limit type I IFN-associated pathology.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Interferón Tipo I
/
Interferones
/
Receptores de IgG
/
Células Mieloides
Límite:
Animals
/
Female
/
Humans
Idioma:
En
Revista:
Eur J Immunol
Año:
2018
Tipo del documento:
Article
País de afiliación:
Países Bajos