Interferon inducible transmembrane protein 3 (IFITM3) inhibits influenza
virus replication and inflammation by interacting with ABHD16A
Abstract
IFITM family proteins have broad-spectrum antiviral capabilities.
Preliminary studies in our laboratory have preliminarily proved that
IFITMs have the effect of inhibiting influenza viruses. In order to
further study its mechanism and role in the occurrence and development
of influenza, relevant studies have been carried out. Fluorescence
quantitative PCR detection, yeast two-hybrid test and optical confocal
microscopy were used to investigate the effect of hIFITM3 on influenza
virus replication, the interaction with hABHD16A and the expression of
inflammation-related factors. In HEK293 cells, overexpression of hIFITM3
protein significantly inhibited the replication of influenza virus at
24h, 48h, and 72h; yeast two-hybrid experiment proved that IFITM3
interacts with ABHD16A; laser confocal microscopy observations showed
that IFITM3 and ABHD16A co-localized in Cell membrane area; the
expression level of inflammation-related factors in cells overexpressing
hIFITM3 or hABHD16A was detected by fluorescence quantitative PCR, and
the results showed that the mRNA levels of IL-1β, IL-6, IL-10, TNF-a and
COX2 were significantly increased . But when IFITM3/ABHD16A was
co-expressed, the mRNA expression levels of these cytokines were
significantly reduced except for COX2. When influenza virus infected
cells co-expressing IFITM3/ABHD16A, the expression level of inflammatory
factors decreased compared with the control group, indicating that
IFITM3 can play an important role in regulating inflammation balance.
This study confirmed that hIFITM3 has an effect of inhibiting influenza
virus replication. Furthermore, it was found that hIFITM3 interacts with
hABHD16A, following which it can better inhibit the replication of
influenza virus and the inflammatory response caused by the disease
process.