No FDA-approved stem-cell therapy exists for Parkinson's. Several neurogenic cell products are in Phase 1–2; none has reached pivotal Phase 3. Levodopa and deep-brain stimulation are proven and approved; stem cells are investigational. 'FDA approval' claims for Parkinson's stem-cell treatments outside trials should be disregarded.
Parkinson's disease results from progressive loss of dopamine-producing neurons in the substantia nigra. Stem-cell research pursues two complementary routes: neurogenic cells differentiated toward dopamine neurons are studied to replace lost cells and restore dopamine signalling, while placental mesenchymal stem cells are explored for neuroprotection — slowing degeneration through anti-inflammatory and growth-factor secretion. Preclinical evidence suggests dopamine-releasing cells can reinnervate the striatum and that trophic factors may delay neuronal death. Key challenges are achieving cell survival, integration and functional restoration in a degenerating brain. Most trials are early-phase, with modest motor changes reported.
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Medically reviewed by StemCellAtlas’s editorial team with Kiian Nadiia, MD, PhD (Paediatric Neurologist · Medical Director, CSM Clinic Network · 12+ yrs in Autism Spectrum Disorders) of partner clinic Stem Plus (Sofia), against ISSCR, FDA & EMA guidance. Educational information, not medical advice; figures indicative.
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