NIK promotes tissue destruction independently of the alternative NF-κB pathway through TNFR1/RIP1-induced apoptosis
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NIK promotes tissue destruction independently of the alternative NF-κB pathway through TNFR1/RIP1-induced apoptosis. / Boutaffala, L; Bertrand, M J M; Remouchamps, C; Seleznik, G; Reisinger, F; Janas, M; Bénézech, C; Fernandes, M T; Marchetti, S; Mair, F; Ganeff, C; Hupalowska, A; Ricci, J-E; Becher, B; Piette, J; Knolle, P; Caamano, J; Vandenabeele, P; Heikenwalder, M; Dejardin, E.
In: Cell Death & Differentiation , Vol. 22, No. 12, 12.2015, p. 2020-33.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - NIK promotes tissue destruction independently of the alternative NF-κB pathway through TNFR1/RIP1-induced apoptosis
AU - Boutaffala, L
AU - Bertrand, M J M
AU - Remouchamps, C
AU - Seleznik, G
AU - Reisinger, F
AU - Janas, M
AU - Bénézech, C
AU - Fernandes, M T
AU - Marchetti, S
AU - Mair, F
AU - Ganeff, C
AU - Hupalowska, A
AU - Ricci, J-E
AU - Becher, B
AU - Piette, J
AU - Knolle, P
AU - Caamano, J
AU - Vandenabeele, P
AU - Heikenwalder, M
AU - Dejardin, E
PY - 2015/12
Y1 - 2015/12
N2 - NF-κB-inducing kinase (NIK) is well-known for its role in promoting p100/NF-κB2 processing into p52, a process defined as the alternative, or non-canonical, NF-κB pathway. Here we reveal an unexpected new role of NIK in TNFR1-mediated RIP1-dependent apoptosis, a consequence of TNFR1 activation observed in c-IAP1/2-depleted conditions. We show that NIK stabilization, obtained by activation of the non-death TNFRs Fn14 or LTβR, is required for TNFα-mediated apoptosis. These apoptotic stimuli trigger the depletion of c-IAP1/2, the phosphorylation of RIP1 and the RIP1 kinase-dependent assembly of the RIP1/FADD/caspase-8 complex. In the absence of NIK, the phosphorylation of RIP1 and the formation of RIP1/FADD/caspase-8 complex are compromised while c-IAP1/2 depletion is unaffected. In vitro kinase assays revealed that recombinant RIP1 is a bona fide substrate of NIK. In vivo, we demonstrated the requirement of NIK pro-death function, but not the processing of its substrate p100 into p52, in a mouse model of TNFR1/LTβR-induced thymus involution. In addition, we also highlight a role for NIK in hepatocyte apoptosis in a mouse model of virus-induced TNFR1/RIP1-dependent liver damage. We conclude that NIK not only contributes to lymphoid organogenesis, inflammation and cell survival but also to TNFR1/RIP1-dependent cell death independently of the alternative NF-κB pathway.
AB - NF-κB-inducing kinase (NIK) is well-known for its role in promoting p100/NF-κB2 processing into p52, a process defined as the alternative, or non-canonical, NF-κB pathway. Here we reveal an unexpected new role of NIK in TNFR1-mediated RIP1-dependent apoptosis, a consequence of TNFR1 activation observed in c-IAP1/2-depleted conditions. We show that NIK stabilization, obtained by activation of the non-death TNFRs Fn14 or LTβR, is required for TNFα-mediated apoptosis. These apoptotic stimuli trigger the depletion of c-IAP1/2, the phosphorylation of RIP1 and the RIP1 kinase-dependent assembly of the RIP1/FADD/caspase-8 complex. In the absence of NIK, the phosphorylation of RIP1 and the formation of RIP1/FADD/caspase-8 complex are compromised while c-IAP1/2 depletion is unaffected. In vitro kinase assays revealed that recombinant RIP1 is a bona fide substrate of NIK. In vivo, we demonstrated the requirement of NIK pro-death function, but not the processing of its substrate p100 into p52, in a mouse model of TNFR1/LTβR-induced thymus involution. In addition, we also highlight a role for NIK in hepatocyte apoptosis in a mouse model of virus-induced TNFR1/RIP1-dependent liver damage. We conclude that NIK not only contributes to lymphoid organogenesis, inflammation and cell survival but also to TNFR1/RIP1-dependent cell death independently of the alternative NF-κB pathway.
KW - Animals
KW - Apoptosis/drug effects
KW - Caspase 8/chemistry
KW - Cell Line
KW - Fas-Associated Death Domain Protein/chemistry
KW - GTPase-Activating Proteins/chemistry
KW - HEK293 Cells
KW - Humans
KW - Inhibitor of Apoptosis Proteins/genetics
KW - Liver/drug effects
KW - Lymphotoxin beta Receptor/metabolism
KW - Mice
KW - Mice, Inbred C57BL
KW - Mice, Knockout
KW - NF-kappa B/metabolism
KW - Phosphorylation
KW - Protein-Serine-Threonine Kinases/deficiency
KW - Receptors, Tumor Necrosis Factor, Type I/metabolism
KW - Signal Transduction/drug effects
KW - Thymus Gland/metabolism
KW - Tumor Necrosis Factor-alpha/pharmacology
U2 - 10.1038/cdd.2015.69
DO - 10.1038/cdd.2015.69
M3 - Article
C2 - 26045047
VL - 22
SP - 2020
EP - 2033
JO - Cell Death & Differentiation
JF - Cell Death & Differentiation
SN - 1350-9047
IS - 12
ER -