4.7 Article

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

Journal

STEM CELLS
Volume 25, Issue 4, Pages 918-928

Publisher

WILEY
DOI: 10.1634/stemcells.2006-0386

Keywords

Parkinson disease; embryonic stem cell; transplantation; microdialysis; positron emission tomography; dopamine transporter

Funding

  1. Intramural NIH HHS [Z01 MH002795, Z01 MH002795-07] Funding Source: Medline
  2. NATIONAL INSTITUTE OF MENTAL HEALTH [Z01MH002852, Z01MH002793, Z01MH002795] Funding Source: NIH RePORTER
  3. NATIONAL INSTITUTE OF NEUROLOGICAL DISORDERS AND STROKE [Z01NS002881, Z01NS002981] Funding Source: NIH RePORTER
  4. NATIONAL INSTITUTE ON ALCOHOL ABUSE AND ALCOHOLISM [Z01AA000551] Funding Source: NIH RePORTER

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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.

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