Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-57689
Gentle, I E; Wong, W W L; Evans, J M; Bankovacki, A; Cook, W D; Khan, N R; Nachbur, U; Rickard, J; Anderton, H; Moulin, M; Lluis, J M; Moujalled, D M; Silke, J; Vaux, D L (2011). In TNF-stimulated cells, RIPK1 promotes cell survival by stabilizing TRAF2 and cIAP1, which limits induction of non-canonical NF-kappaB and activation of caspase-8. Journal of Biological Chemistry, 286(15):13282-13291.
|Accepted Version (English)|
RIPK1 is involved in signaling from TNF and TLR family receptors. After receptor ligation, RIPK1 not only modulates activation of both canonical and NIK-dependent NF-κB, but also regulates caspase-8 activation and cell death. Although overexpression of RIPK1 can cause caspase-8-dependent cell death, when RIPK1(-/-) cells are exposed to TNF and low doses of cycloheximide, they die more readily than wild-type cells, indicating RIPK1 has pro-survival as well as pro-apoptotic activities. To determine how RIPK1 promotes cell survival, we compared wild-type and RIPK1(-/-) cells treated with TNF. Although TRAF2 levels remained constant in TNF-treated wild-type cells, TNF stimulation of RIPK1(-/-) cells caused TRAF2 and cIAP1 to be rapidly degraded by the proteasome, which led to an increase in NIK levels. This resulted in processing of p100 NF-κB2 to p52, a decrease in levels of cFLIP(L), and activation of caspase-8, culminating in cell death. Therefore, the pro-survival effect of RIPK1 is mediated by stabilization of TRAF2 and cIAP1.
|Item Type:||Journal Article, refereed, original work|
|Communities & Collections:||04 Faculty of Medicine > University Hospital Zurich > Institute of Experimental Immunology|
|DDC:||570 Life sciences; biology|
610 Medicine & health
|Deposited On:||01 Feb 2012 21:09|
|Last Modified:||23 Nov 2012 13:28|
|Publisher:||American Society for Biochemistry and Molecular Biology|
|Additional Information:||This research was originally published in Journal of Biological Chemistry. Gentle IE, Wong WW, Evans JM, Bankovacki A, Cook WD, Khan NR, Nachbur U, Rickard J, Anderton H, Moulin M, Lluis JM, Moujalled DM, Silke J, Vaux DL. In TNF-stimulated cells, RIPK1 promotes cell survival by stabilizing TRAF2 and cIAP1, which limits induction of non-canonical NF-kappaB and activation of caspase-8. Journal of Biological Chemistry. 2011; 286(15):13282-13291. © the American Society for Biochemistry and Molecular Biology.|
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