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Abstract

Resistance of glioblastoma multiforme (GBM) to TNFα induced apoptosis is attributed to NFκB activation. As TNF-receptor family member CD40 regulates NFκB activation, we investigated the role of CD40 in NFκB activation in GBM. We observed elevated CD40 levels in human glioma samples as compared to the surrounding normal tissue. Treatment with TNFα elevated CD40 levels in glioma cells and inhibition of CD40 signaling failed to abrogate TNFα induced NFκΒ activity. While TNFα increased the interaction between TRAF2/6, IκBα, IKKα/β in the CD40 signalosome, the level of CD40 in the signalosome remained unaffected upon TNFα treatment. Interestingly, TNFα decreased the spatial localization of CD40 and increased TRAF2/6 co-localization with lipid raft marker Caveolin. As localization of CD40 signalosome in lipid raft is crucial for NFκB activation, TNFα mediated decreased clustering of CD40 in lipid rafts could have possibly contributed to its non-involvement in NFκB activation

Item Type:	Article
Subjects:	Neurodegenerative Disorders Neuro-Oncological Disorders Neurocognitive Processes Neuronal Development and Regeneration Informatics and Imaging Genetics and Molecular Biology
Depositing User:	Dr. D.D. Lal
Date Deposited:	05 May 2017 10:35
Last Modified:	02 Dec 2021 03:52
URI:	http://nbrc.sciencecentral.in/id/eprint/94

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