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2013 ; 4
(7
): e742
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Anticancer compound ABT-263 accelerates apoptosis in virus-infected cells and
imbalances cytokine production and lowers survival rates of infected mice
#MMPMID23887633
Kakkola L
; Denisova OV
; Tynell J
; Viiliäinen J
; Ysenbaert T
; Matos RC
; Nagaraj A
; Ohman T
; Kuivanen S
; Paavilainen H
; Feng L
; Yadav B
; Julkunen I
; Vapalahti O
; Hukkanen V
; Stenman J
; Aittokallio T
; Verschuren EW
; Ojala PM
; Nyman T
; Saelens X
; Dzeyk K
; Kainov DE
Cell Death Dis
2013[Jul]; 4
(7
): e742
PMID23887633
show ga
ABT-263 and its structural analogues ABT-199 and ABT-737 inhibit B-cell lymphoma
2 (Bcl-2), BCL2L1 long isoform (Bcl-xL) and BCL2L2 (Bcl-w) proteins and promote
cancer cell death. Here, we show that at non-cytotoxic concentrations, these
small molecules accelerate the deaths of non-cancerous cells infected with
influenza A virus (IAV) or other viruses. In particular, we demonstrate that
ABT-263 altered Bcl-xL interactions with Bcl-2 antagonist of cell death (Bad),
Bcl-2-associated X protein (Bax), uveal autoantigen with coiled-coil domains and
ankyrin repeats protein (UACA). ABT-263 thereby activated the caspase-9-mediated
mitochondria-initiated apoptosis pathway, which, together with the IAV-initiated
caspase-8-mediated apoptosis pathway, triggered the deaths of IAV-infected cells.
Our results also indicate that Bcl-xL, Bcl-2 and Bcl-w interact with pattern
recognition receptors (PRRs) that sense virus constituents to regulate cellular
apoptosis. Importantly, premature killing of IAV-infected cells by ABT-263
attenuated the production of key pro-inflammatory and antiviral cytokines. The
imbalance in cytokine production was also observed in ABT-263-treated
IAV-infected mice, which resulted in an inability of the immune system to clear
the virus and eventually lowered the survival rates of infected animals. Thus,
the results suggest that the chemical inhibition of Bcl-xL, Bcl-2 and Bcl-w could
potentially be hazardous for cancer patients with viral infections.