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Prana Biotechnology Limited Message Board

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  • twosidestoapancake twosidestoapancake Jan 7, 2012 11:22 AM Flag

    Past Posts

    posted 16April2004 by egmons2003

    Arch Neurol. 2003 Dec;60(12):1685-91. Related Articles, Links

    Comment in:
    Arch Neurol. 2003 Dec;60(12):1678-9.

    Metal-protein attenuation with iodochlorhydroxyquin (clioquinol) targeting Abeta amyloid deposition and toxicity in Alzheimer disease: a pilot phase 2 clinical trial.

    Ritchie CW, Bush AI, Mackinnon A, Macfarlane S, Mastwyk M, MacGregor L, Kiers L, Cherny R, Li QX, Tammer A, Carrington D, Mavros C, Volitakis I, Xilinas M, Ames D, Davis S, Beyreuther K, Tanzi RE, Masters CL.

    Departments of Pathology, The University of Melbourne, The Mental Health Research Institute of Victoria, Parkville, Victoria, Australia.

    BACKGROUND: Alzheimer disease (AD) may be caused by the toxic accumulation of beta-amyloid (Abeta). OBJECTIVE: To test this theory, we developed a clinical intervention using clioquinol, a metal-protein-attenuating compound (MPAC) that inhibits zinc and copper ions from binding to Abeta, thereby promoting Abeta dissolution and diminishing its toxic properties. METHODS: A pilot phase 2 clinical trial in patients with moderately severe Alzheimer disease. RESULTS: Thirty-six subjects were randomized. The effect of treatment was significant in the more severely affected group (baseline cognitive subscale score of the Alzheimer's Disease Assessment Scale, >/=25), due to a substantial worsening of scores in those taking placebo compared with minimal deterioration for the clioquinol group. Plasma Abeta42 levels declined in the clioquinol group and increased in the placebo group. Plasma zinc levels rose in the clioquinol-treated group. The drug was well tolerated. CONCLUSION: Subject to the usual caveats inherent in studies with small sample size, this pilot phase 2 study supports further investigation of this novel treatment strategy using a metal-protein-attenuating compound.

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