A zwitterionic polymer-inspired material mediated efficient CRISPR-Cas9 gene editing

Area of Science:

• Biotechnology
• Molecular Biology
• Genetics

Background:

• CRISPR/Cas9 is a powerful genome-editing tool but faces challenges with inefficient delivery.
• Polo-like kinase 1 (PLK1) is crucial for mitosis and often overexpressed in tumors.

Purpose of the Study:

• To develop and evaluate a novel gene vector, ZEBRA, for efficient CRISPR/Cas9 delivery.
• To investigate the potential of ZEBRA-mediated CRISPR/Cas9 delivery for targeting PLK1 in cancer cells.

Main Methods:

• Development of ZEBRA, a zwitterionic polymer-inspired material with a branched structure.
• Delivery of CRISPR/Cas9 plasmids encoding Cas9 and sgRNA targeting the PLK1 gene using ZEBRA.
• Assessment of ZEBRA's transduction efficiency in various cell lines, including CD44-positive and CD44-negative cancer cells.
• Evaluation of PLK1 gene knockout, Cas9 protein expression, and tumor cell growth inhibition.

Main Results:

• ZEBRA demonstrated efficient delivery of large CRISPR/Cas9 systems into cells.
• Transduction efficiency was significantly higher (approximately 10-fold) in CD44-positive cancer cell lines compared to CD44-negative ones.
• ZEBRA facilitated high Cas9 expression and effective editing of the PLK1 gene.
• Significant inhibition of tumor cell growth was observed post-treatment.

Conclusions:

• ZEBRA is an effective and targeted gene delivery vector for CRISPR/Cas9 systems.
• ZEBRA shows promise for cancer therapy by enabling targeted gene editing and inhibiting tumor growth.
• Further research is warranted to explore the full potential of ZEBRA in diverse gene delivery applications.