Concise review: Patient-derived olfactory stem cells: new models for brain diseases

Area of Science:

• Neuroscience
• Stem Cell Biology
• Genetics

Background:

• Traditional brain disease models have limited success in drug translation, leading pharmaceutical companies to exit neuroscience research.
• Patient-derived stem cell models offer potential to study cell biological aspects of brain diseases not present in traditional animal models.
• Neural stem cells reside in the olfactory mucosa, the organ of smell.

Purpose of the Study:

• To investigate the utility of patient-derived olfactory mucosa stem cells (OMSCs) as a model for understanding brain diseases.
• To identify disease-specific cellular phenotypes and alterations in gene expression and cell function.
• To assess the suitability of OMSC cultures for drug screening and discovery.

Main Methods:

• Generation of olfactory mucosa stem cells from patients with schizophrenia, Parkinson's disease, and familial dysautonomia.
• Comparison of OMSCs from patients with cells from healthy controls.
• Analysis of gene expression and cell functions, including cell cycle, proliferation, oxidative stress, and cell migration.

Main Results:

• Patient-derived OMSCs demonstrated disease-specific alterations compared to controls.
• Schizophrenia-associated OMSCs showed a shorter cell cycle and faster proliferation.
• Parkinson's disease-associated OMSCs exhibited oxidative stress, and familial dysautonomia-associated OMSCs displayed altered cell migration.
• These findings indicate convergence of multiple genes on shared cell signaling pathways, presenting a disease-specific cellular phenotype.

Conclusions:

• Olfactory mucosa stem cells provide a viable model for elucidating cellular mechanisms in complex brain diseases.
• OMSCs reveal patient-control differences, even in genetic disorders like schizophrenia and Parkinson's disease.
• Homogeneous OMSC cultures are suitable for robust, repeatable multiwell assays for screening drug candidates.