Olfactory Neuroepithelial Neural Progenitor Cells from Subjects with Bipolar I Disorder

Area of Science:

• Neuroscience
• Cell Biology
• Psychiatry

Background:

• Studying bipolar disorder (BD) pathophysiology is challenging due to the inability to directly examine brain cellular processes in patients.
• Existing research methods for BD cellular studies often require genetic manipulation, which can introduce confounding factors.

Purpose of the Study:

• To establish and characterize olfactory neural progenitor (ONP) cell lines from individuals with bipolar I disorder.
• To assess the safety and feasibility of obtaining ONP cells via outpatient endoscopic biopsy.
• To explore the potential of ONP cells for investigating the cellular mechanisms underlying bipolar disorder.

Main Methods:

• Outpatient endoscopic biopsy was performed on subjects diagnosed with bipolar I disorder.
• Olfactory function was evaluated before and after the biopsy using the University of Pennsylvania Smell Identification Test (UPSIT).
• Obtained cells were characterized to confirm their neural progenitor lineage and identify specific protein markers.

Main Results:

• The biopsy procedure was safe, with no significant complications reported, including effects on olfactory function.
• Olfactory neural progenitor (ONP) cells were successfully isolated in 23.1% of biopsy attempts (3 out of 13).
• Characterization confirmed ONPs expressed both neuron-specific (e.g., β-tubulin III, nestin) and glia-specific (e.g., GFAP, MBP) proteins.

Conclusions:

• Olfactory neural progenitor (ONP) cells can be safely acquired from awake outpatients with bipolar disorder.
• These ONP cells represent a valuable tool for studying the pathophysiology of bipolar illness and potentially other neuropsychiatric conditions.
• Using patient-derived ONP cells allows for the investigation of cellular pathology without the need for genetic manipulation, unlike induced pluripotent stem cells.