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2015 ; 6
(5
): e1758
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IPS-1 differentially induces TRAIL, BCL2, BIRC3 and PRKCE in type I
interferons-dependent and -independent anticancer activity
#MMPMID25950488
Kumar S
; Ingle H
; Mishra S
; Mahla RS
; Kumar A
; Kawai T
; Akira S
; Takaoka A
; Raut AA
; Kumar H
Cell Death Dis
2015[May]; 6
(5
): e1758
PMID25950488
show ga
RIG-I-like receptors are the key cytosolic sensors for RNA viruses and induce the
production of type I interferons (IFN) and pro-inflammatory cytokines through a
sole adaptor IFN-? promoter stimulator-1 (IPS-1) (also known as Cardif, MAVS and
VISA) in antiviral innate immunity. These sensors also have a pivotal role in
anticancer activity through induction of apoptosis. However, the mechanism for
their anticancer activity is poorly understood. Here, we show that anticancer
vaccine adjuvant, PolyIC (primarily sensed by MDA5) and the oncolytic virus,
Newcastle disease virus (NDV) (sensed by RIG-I), induce anticancer activity. The
ectopic expression of IPS-1 into type I IFN-responsive and non-responsive cancer
cells induces anticancer activity. PolyIC transfection and NDV infection
upregulate pro-apoptotic gene TRAIL and downregulate the anti-apoptotic genes
BCL2, BIRC3 and PRKCE. Furthermore, stable knockdown of IPS-1, IRF3 or IRF7 in
IFN-non-responsive cancer cells show reduced anticancer activity by suppressing
apoptosis via TRAIL and anti-apoptotic genes. Collectively, our study shows that
IPS-1 induces anticancer activity through upregulation of pro-apoptotic gene
TRAIL and downregulation of the anti-apoptotic genes BCL2, BIRC3 and PRKCE via
IRF3 and IRF7 in type I IFN-dependent and -independent manners.
|Adaptor Proteins, Signal Transducing/*genetics
[MESH]
|Apoptosis/immunology
[MESH]
|Baculoviral IAP Repeat-Containing 3 Protein
[MESH]
|Cancer Vaccines/immunology
[MESH]
|Cell Line, Tumor
[MESH]
|Down-Regulation
[MESH]
|HEK293 Cells
[MESH]
|Humans
[MESH]
|Inhibitor of Apoptosis Proteins/biosynthesis/genetics
[MESH]