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Role of Non-neuronal Cells in Tauopathies After Brain Injury

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Technical Report,15 Aug 2016,14 Aug 2017

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University of California, Los Angeles Los Angeles United States

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The purpose of this study is to identify how, after mild repeated traumatic brain injury TBI, specific inflammatory factors complement proteins elevated during long asymptomatic prodromal period are responsible for the eventual onset of cognitive deficits and neurodegeneration. We investigate how inflammation leads to accumulation of aberrant tau aggregates, a common downstream pathway directly causing neurodegeneration in many neurodegenerative disease, including TBI. We use a human Tau Tg mouse that models effects of TBI on normal tau expression. This mouse is bred to mice with novel transgenes associated with complement activation one lacking the brake of the complement cascade C1inh KO and the other overexpressing C5a. During this 2nd year we produced new data demonstrating a robust effect of C1inhKOaffecting the response to TBI in human tau mice, increasing tau and pyknotic neurons as well as a tau kinase which increases tau phosphorylation, supporting a pathogenic role of C1q in tau-dependent injury after TBI.

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  • Medicine and Medical Research

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