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    FEBS Lett. 2009 Jul 21;583(14):2419-24. Epub 2009 Jun 26.

    Methylene blue and dimebon inhibit aggregation of TDP-43 in cellular models.

    Yamashita M, Nonaka T, Arai T, Kametani F, Buchman VL, Ninkina N, Bachurin SO, Akiyama H, Goedert M, Hasegawa M.

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    Department of Molecular Neurobiology, Tokyo Institute of Psychiatry, Tokyo Metropolitan Organization for Medical Reearch, 2-1-8 Kamikitazawa, Setagaya-ku, Tokyo 156-8585, Japan.

    Abstract

    Amyotrophic lateral sclerosis (ALS) and frontotemporal lobar degeneration with ubiquitinated inclusions (FTLD-U) are major neurodegenerative diseases with TDP-43 pathology. Here we investigated the effects of methylene blue (MB) and dimebon, two compounds that have been reported to be beneficial in phase II clinical trials of Alzheimer's disease (AD), on the formation of TDP-43 aggregates in SH-SY5Y cells. Following treatment with 0.05 microM MB or 5 microM dimebon, the number of TDP-43 aggregates was reduced by 50% and 45%, respectively. The combined use of MB and dimebon resulted in a 80% reduction in the number. These findings were confirmed by immunoblot analysis. The results indicate that MB and dimebon may be useful for the treatment of ALS, FTLD-U and other TDP-43 proteinopathies.

    PMID:
    19560462
    [PubMed - indexed for MEDLINE]

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