CRISPR-Cas9-based photoactivatable transcription systems to induce neuronal differentiation

Area of Science:

• Molecular Biology
• Gene Regulation
• Biotechnology

Background:

• CRISPR-Cas9 technology offers precise genome editing capabilities.
• Controlling gene expression with external stimuli, like light, is crucial for biological research.
• Existing photoactivatable transcription systems have limitations in efficiency and reversibility.

Purpose of the Study:

• To develop and characterize improved CRISPR-Cas9-based photoactivatable transcription systems.
• To achieve high blue-light-inducible activation of endogenous target genes.
• To demonstrate reversible gene activation and specific cellular differentiation.

Main Methods:

• Engineering of CRISPR-Cas9-based photoactivatable transcription systems (CPTS2.0 and Split-CPTS2.0).
• Testing system performance in various human cell lines.
• Inducing gene expression and cellular differentiation using blue light.
• Monitoring gene activation and cellular changes.

Main Results:

• CPTS2.0 and Split-CPTS2.0 demonstrated high blue-light-inducible activation of endogenous genes.
• Reversible activation of target genes was achieved using CPTS2.0.
• Split-CPTS2.0 successfully induced neuronal differentiation in induced pluripotent stem cells (iPSCs) by upregulating NEUROD1.

Conclusions:

• The developed CPTS2.0 and Split-CPTS2.0 systems provide efficient and controllable methods for gene regulation.
• These systems offer precise temporal and spatial control over gene expression using blue light.
• The ability to induce neuronal differentiation highlights the potential of these systems in regenerative medicine and developmental biology research.