JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
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Targeted downregulation of dMyc restricts neurofibrillary tangles mediated pathogenesis of human neuronal tauopathies in Drosophila.

Formation of Neurofibrillary Tangles (NFTs) in neuronal tissues has been implicated as the hallmark of disease pathogenesis and tau mediated toxicity in human and mammalian models. However, previous studies had failed to correlate NFT formation with pathogenesis of human neuronal tauopathies in Drosophila disease models. Though, a recent report suggests formation of tau mediated NFTs like structures confined to dopaminergic neurons in Drosophila adult brain; by utilizing various approaches, we demonstrate distinct and recurrent formation of NFTs in Drosophila neuronal tissues upon expression of wild type or mutant isoforms of human tau protein, and this appears as the key mediator of the pathogenesis of human neuronal tauopathy in Drosophila. Further, we show that tissue specific downregulation of dMyc (Drosophila homolog of human c-myc proto-oncogene) alleviates h-tau mediated cellular and functional deficits by restricting the formation of NFTs in neuronal tissues. Therefore, our findings provide very critical and novel insights about pathogenesis of human neuronal tauopathies in Drosophila disease models.

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