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2017 ; 24
(3
): 481-491
Nephropedia Template TP
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Combination of IAP antagonist and IFN? activates novel caspase-10- and
RIPK1-dependent cell death pathways
#MMPMID28106882
Tanzer MC
; Khan N
; Rickard JA
; Etemadi N
; Lalaoui N
; Spall SK
; Hildebrand JM
; Segal D
; Miasari M
; Chau D
; Wong WL
; McKinlay M
; Chunduru SK
; Benetatos CA
; Condon SM
; Vince JE
; Herold MJ
; Silke J
Cell Death Differ
2017[Mar]; 24
(3
): 481-491
PMID28106882
show ga
Peptido-mimetic inhibitor of apoptosis protein (IAP) antagonists (Smac mimetics
(SMs)) can kill tumour cells by depleting endogenous IAPs and thereby inducing
tumour necrosis factor (TNF) production. We found that interferon-? (IFN?)
synergises with SMs to kill cancer cells independently of TNF- and other cell
death receptor signalling pathways. Surprisingly, CRISPR/Cas9 HT29 cells doubly
deficient for caspase-8 and the necroptotic pathway mediators RIPK3 or MLKL were
still sensitive to IFN?/SM-induced killing. Triple CRISPR/Cas9-knockout HT29
cells lacking caspase-10 in addition to caspase-8 and RIPK3 or MLKL were
resistant to IFN?/SM killing. Caspase-8 and RIPK1 deficiency was, however,
sufficient to protect cells from IFN?/SM-induced cell death, implying a role for
RIPK1 in the activation of caspase-10. These data show that RIPK1 and caspase-10
mediate cell death in HT29 cells when caspase-8-mediated apoptosis and
necroptosis are blocked and help to clarify how SMs operate as chemotherapeutic
agents.
|Animals
[MESH]
|Apoptosis/*drug effects
[MESH]
|CRISPR-Cas Systems/genetics
[MESH]
|Caspase 10/chemistry/genetics/*metabolism
[MESH]
|Caspase 8/chemistry/genetics/metabolism
[MESH]
|Caspase Inhibitors/pharmacology
[MESH]
|Cell Line
[MESH]
|Cytokine TWEAK/pharmacology
[MESH]
|Drug Synergism
[MESH]
|HT29 Cells
[MESH]
|Humans
[MESH]
|Inhibitor of Apoptosis Proteins/antagonists & inhibitors/*metabolism
[MESH]