Modeling the C9ORF72 repeat expansion mutation using human induced pluripotent stem cells.

Area of Science:

• Neurogenetics
• Stem Cell Biology
• Neurology

Background:

• The C9ORF72 repeat expansion is the leading genetic cause of amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD).
• The discovery of this mutation in 2011 and its complexity have hindered the development of accurate disease models.
• Emerging animal models and patient-derived induced pluripotent stem cells (iPSCs) are beginning to address this gap.

Purpose of the Study:

• To review the potential of human C9ORF72 iPSC platforms for modeling disease pathology.
• To compare findings from iPSC models with existing animal models and post-mortem data.
• To highlight opportunities for advancing the understanding of C9ORF72-related neurological disorders.

Main Methods:

• Review of current literature on C9ORF72 repeat expansion, ALS, and FTD.
• Analysis of studies utilizing patient-derived iPSCs to model C9ORF72 mutation.
• Comparative assessment of iPSC-based findings against established animal models and human post-mortem data.

Main Results:

• Human iPSC models show promise in recapitulating key pathological features of C9ORF72-associated ALS and FTD.
• Comparisons reveal both shared and distinct disease mechanisms across iPSC, animal, and post-mortem studies.
• iPSC platforms provide a valuable tool for dissecting the cellular and molecular consequences of the C9ORF72 mutation.

Conclusions:

• Human C9ORF72 iPSC platforms offer significant opportunities for disease modeling and drug discovery for ALS and FTD.
• Integrating iPSC data with other model systems enhances comprehension of C9ORF72-related neurodegeneration.
• Further research using iPSC-derived models is crucial for understanding disease pathogenesis and developing effective therapies.