Unveiling the Neurodegenerative Alterations through Oral Stem Cells.

Area of Science:

• Neuroscience
• Stem Cell Biology
• Regenerative Medicine

Background:

• Parkinson's disease (PD) involves the loss of midbrain dopaminergic (DAergic) neurons.
• Replacing these neurons or enhancing neuromelanin (NM) could treat PD.
• Oral stem cells offer a potential source for neural regeneration.

Purpose of the Study:

• To compare human periapical-cysts mesenchymal stem cells (hPCy-MSCs) and dental pulp stem cells (DPSCs) for DAergic neuron differentiation.
• To generate functional 3D midbrain-like organoids in vitro.
• To assess the potential of oral stem cells in Parkinson's disease modeling and therapy.

Main Methods:

• Assessed differentiation of hPCy-MSCs and DPSCs into neuron-like cells (NLCs).
• Evaluated NLCs for DAergic neuron markers, electrical activity, and dopamine production.
• Generated and characterized 3D midbrain-like organoids from oral stem cells.

Main Results:

• Both hPCy-MSCs and DPSCs differentiated into NLCs, confirmed by increased lactate.
• NLCs were further differentiated into functional, DAergic, NM-producing neurons.
• 3D midbrain-like organoids were successfully generated, expressing neural markers and NM-like granules.

Conclusions:

• Oral stem cells can be differentiated into functional DAergic neurons.
• 3D midbrain organoids derived from oral stem cells provide a novel disease model.
• These findings highlight oral stem cells as a valuable tool for Parkinson's disease research.