CRISPR-Cas9-Induced Gene Editing in Primary Human Monocytes

Area of Science:

• Immunology
• Molecular Biology
• Cell Biology

Background:

• Monocytes are crucial immune cells involved in homeostasis and inflammation.
• Current CRISPR-Cas9 methods using lentiviral vectors show low gene knockout efficiency in primary human monocytes.
• Studying primary monocyte functions is essential for understanding immune responses.

Purpose of the Study:

• To develop an efficient in vitro gene-editing procedure for primary human monocytes.
• To overcome the limitations of lentiviral vector-based CRISPR-Cas9 in primary monocytes.
• To enable functional studies of signaling molecules modulating monocyte polarization.

Main Methods:

• Utilized a ribonucleoprotein (RNP) complex comprising Cas9 protein and single-guide RNA (sgRNA).
• Applied the RNP complex for in vitro gene editing in primary human monocytes.
• Optimized the protocol for consistent and high gene knockout efficiency.

Main Results:

• Achieved consistent and high gene knockout efficiency in primary human monocytes.
• Demonstrated the effectiveness of the RNP complex for gene editing in this cell type.
• Established a reliable method for manipulating gene expression in primary monocytes.

Conclusions:

• The developed RNP-based CRISPR-Cas9 method provides a robust approach for gene editing in primary human monocytes.
• This technique significantly improves gene knockout efficiency compared to lentiviral vectors.
• The method facilitates the investigation of monocyte functions, particularly in polarization and signaling pathways.