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Pubmed ID :11002417
Publication Date : //

Activation of the NF-kappaB pathway by caspase 8 and its homologs.


Caspase 8 is the most proximal caspase in the caspase cascade and has been known for its role in the mediation of cell death by various death receptors belonging to the TNFR family. We have discovered that Caspase 8 can activate the NF-kappaB pathway independent of its activity as a pro-apoptotic protease. This property is localized to its N-terminal prodomain, which contains two homologous death effector domains (DEDs). Caspase 10 and MRIT, two DEDs-containing homologs of Caspase 8, can similarly activate the NF-kappaB pathway. Dominant-negative mutants of the Caspase 8 prodomain can block NF-kappaB induced by Caspase 8, FADD and several death receptors belonging to the TNFR family. Caspase 8 can interact with multiple proteins known to be involved in the activation of the NF-kappaB pathway, including the serine-threonine kinases RIP, NIK, IKK1 and IKK2. Thus, DEDs-containing caspases and caspase homolog(s) may have functions beyond their known role in the mediation of cell death. Oncogene (2000) 19, 4451 - 4460.

Authors : Chaudhary P M , Eby M T , Jasmin A , Kumar A , Liu L , Hood L ,

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