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    Stem Cells. 2007 Apr;25(4):918-28. Epub 2006 Dec 14.

    Persistent dopamine functions of neurons derived from embryonic stem cells in a rodent model of Parkinson disease.

    Rodríguez-Gómez JA, Lu JQ, Velasco I, Rivera S, Zoghbi SS, Liow JS, Musachio JL, Chin FT, Toyama H, Seidel J, Green MV, Thanos PK, Ichise M, Pike VW, Innis RB, McKay RD.

    Source

    Laboratory of Molecular Biology, National Institute of Neurological Disorders and Stroke, Porter Neuroscience Research Center, National Institute of Health, Bethesda, Maryland 20892, USA.

    Abstract

    The derivation of dopamine neurons is one of the best examples of the clinical potential of embryonic stem (ES) cells, but the long-term function of the grafted neurons has not been established. Here, we show that, after transplantation into an animal model, neurons derived from mouse ES cells survived for over 32 weeks, maintained midbrain markers, and had sustained behavioral effects. Microdialysis in grafted animals showed that dopamine (DA) release was induced by depolarization and pharmacological stimulants. Positron emission tomography measured the expression of presynaptic dopamine transporters in the graft and also showed that the number of postsynaptic DA D(2) receptors was normalized in the host striatum. These data suggest that ES cell-derived neurons show DA release and reuptake and stimulate appropriate postsynaptic responses for long periods after implantation. This work supports continued interest in ES cells as a source of functional DA neurons.

    PMID:
    17170065
    [PubMed - indexed for MEDLINE]
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