Cas9 Stable Cell Line - U-937

The U-937-Cas9 stable cell line is the preferred model for studying human monocytes and macrophages. It is established by integrating the Cas9 nuclease into the human U-937 cell line. The U-937 cell line is a suspension cell line isolated from the pleural effusion of a 37-year-old male patient with histiocytic lymphoma. These cells exhibit typical promonocyte morphology and can be induced to differentiate into mature macrophage-like cells after treatment with various reagents, including PMA. Constitutive expression of Cas9 in U-937 cells ensures that gene editing mechanisms are always at an optimal level, thus providing an efficient and reproducible system for CRISPR-mediated genome editing. This stable system enables precise gene manipulation of human monocyte models, providing a fundamental model for studying innate immune responses and myeloid differentiation.

The main applications of the U-937-Cas9 stable cell line are inflammation research, innate immune response research, and the screening of novel therapeutic targets for myeloid malignancies. Researchers have used this cell line for large-scale CRISPR screening to identify genes involved in cytokine production, phagocytosis, and the mechanisms of monocyte-to-macrophage differentiation. The U-937-Cas9 cell line is particularly suitable for constructing homologous clones to study how specific gene mutations alter immune cell responses to pathogens or inflammatory stimuli. Furthermore, it serves as an important platform for evaluating the toxicity of new drugs and exploring molecular pathways of apoptosis and cell cycle arrest in leukemia cells. Its well-defined monocyte characteristics and stable Cas9 expression make it an indispensable resource for understanding the complexities of human immunology and developing novel therapies for inflammatory and hematological diseases.