Cell Type-Specific In Vitro Gene Expression Profiling of Stem Cell-Derived Neural Models

Area of Science:

• Neuroscience
• Genomics
• Stem Cell Biology

Background:

• Brain disease research increasingly relies on understanding cell-type specific interactions.
• Human-induced pluripotent stem cell (hiPSC)-based models offer physiological relevance but pose challenges in resolving cell-specific molecular changes.

Purpose of the Study:

• To extend the RiboTag system for cell type-specific RNA analysis in various in vitro models.
• To assess the efficacy and limitations of RiboTag in complex cell cultures, including hiPSC-derived neurons.

Main Methods:

• Adaptation of the RiboTag system, which uses an epitope-tagged ribosomal protein (RPL22), for in vitro applications.
• Testing RiboTag in immortalized cell lines, primary mouse astrocytes, and hiPSC-derived neurons.
• Quantification of off-target RNA depletion in mixed-species co-cultures.

Main Results:

• RiboTag enabled significant depletion of off-target RNA (up to 87%) in mixed-species co-cultures.
• Depletion efficiency showed variability across experimental replicates.
• Lower depletion efficiency was observed particularly in hiPSC-derived motor neurons.

Conclusions:

• The RiboTag system is adaptable to diverse in vitro models for cell type-specific RNA studies.
• Variability in depletion efficiency highlights challenges in applying RiboTag to complex hiPSC-derived neuronal cultures.
• Further optimization is needed to maximize RiboTag's potential in intricate cellular systems for brain disease research.