A single cell high content assay detects mitochondrial dysfunction in iPSC-derived neurons with mutations in SNCA

Area of Science:

• Neuroscience
• Cell Biology
• Biochemistry

Background:

• Mitochondrial dysfunction is a key factor in neurodegenerative diseases like Parkinson's disease (PD).
• Induced pluripotent stem cells (iPSCs) offer a valuable model for studying neurological disorders.
• Developing robust assays for analyzing cellular health in iPSC-derived neurons is crucial for disease research.

Purpose of the Study:

• To establish a high-content screening assay for simultaneously assessing mitochondrial function, morphology, and viability in iPSC-derived dopaminergic neurons.
• To investigate mitochondrial alterations in dopaminergic neurons derived from PD patients with SNCA mutations compared to healthy controls.
• To demonstrate the utility of high-content screening for analyzing mitochondrial health in neuronal models.

Main Methods:

• Differentiated iPSCs from PD patients and controls into dopaminergic neurons.
• Utilized a high-content assay involving TMRM, Hoechst-33342, and Calcein-AM staining.
• Employed automated confocal microscopy and image analysis software to quantify mitochondrial parameters and cell viability.

Main Results:

• PD-derived neurons exhibited significantly reduced mitochondrial membrane potential compared to control neurons.
• Altered mitochondrial morphology was observed in dopaminergic neurons from PD patients.
• The assay successfully measured mitochondrial function, morphology, and viability in single iPSC-derived neurons.

Conclusions:

• High-content screening is effective for analyzing mitochondrial health in iPSC-derived neurons.
• This assay provides a platform for identifying therapeutic targets and testing drugs for Parkinson's disease.
• The findings highlight the potential of this technique for broader neurodegenerative disease research and drug discovery.