Publication Date:
2014-02-22
Description:
Receptor-interacting protein kinase 1 (RIPK1) and RIPK3 trigger pro-inflammatory cell death termed "necroptosis." Studies with RIPK3-deficient mice or the RIPK1 inhibitor necrostatin-1 suggest that necroptosis exacerbates pathology in many disease models. We engineered mice expressing catalytically inactive RIPK3 D161N or RIPK1 D138N to determine the need for the active kinase in the whole animal. Unexpectedly, RIPK3 D161N promoted lethal RIPK1- and caspase-8-dependent apoptosis. In contrast, mice expressing RIPK1 D138N were viable and, like RIPK3-deficient mice, resistant to tumor necrosis factor (TNF)-induced hypothermia. Cells expressing RIPK1 D138N were resistant to TNF-induced necroptosis, whereas TNF-induced signaling pathways promoting gene transcription were unperturbed. Our data indicate that the kinase activity of RIPK3 is essential for necroptosis but also governs whether a cell activates caspase-8 and dies by apoptosis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Newton, Kim -- Dugger, Debra L -- Wickliffe, Katherine E -- Kapoor, Neeraj -- de Almagro, M Cristina -- Vucic, Domagoj -- Komuves, Laszlo -- Ferrando, Ronald E -- French, Dorothy M -- Webster, Joshua -- Roose-Girma, Merone -- Warming, Soren -- Dixit, Vishva M -- New York, N.Y. -- Science. 2014 Mar 21;343(6177):1357-60. doi: 10.1126/science.1249361. Epub 2014 Feb 20.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Physiological Chemistry, Genentech, 1 DNA Way, South San Francisco, CA 94080, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24557836" target="_blank"〉PubMed〈/a〉
Keywords:
Animals
;
*Apoptosis
;
Caspase 8/genetics/metabolism
;
Cell Survival
;
Embryo Loss
;
Embryonic Development
;
Enteritis/pathology
;
Fas-Associated Death Domain Protein/metabolism
;
Gene Knock-In Techniques
;
Intestine, Large/pathology
;
Intestine, Small/pathology
;
Mice
;
*Necrosis
;
Receptor-Interacting Protein Serine-Threonine Kinases/antagonists &
;
inhibitors/genetics/*metabolism
;
Tumor Necrosis Factor-alpha/pharmacology
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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