Cas9 Stable Cell Line - T84

The T84-Cas9 stable cell line is a specialized human genetic model derived from the T84 colon cancer cell line, genetically engineered to constitutively express the Cas9 nuclease. T84 is an adherent epithelial cell line isolated from lung metastases of colorectal cancer patients. A unique biological characteristic of T84 cells is their ability to form a polarized monolayer with high transepithelial electrical resistance (TEER) when grown on a permeable carrier, thus mimicking the intestinal barrier. Integrating Cas9 into this context provides a highly standardized and efficient platform for CRISPR-mediated gene editing in a gut-associated environment. This system ensures the consistency of genomic modifications across the entire cell population, which is crucial for conducting reproducible functional genomics studies in models that preserve complex epithelial features.

The primary applications of the T84-Cas9 stable cell line are colorectal cancer research and studies of intestinal physiology and barrier function. Scientists use this line for CRISPR screening to identify genes involved in tumor invasion, metastasis, and the regulation of ion transport and mucosal permeability. It is a key model for studying the molecular mechanisms of inflammatory bowel disease (IBD) and identifying the interactions between the intestinal epithelium and the gut microbiota. In the laboratory, the T84-Cas9 strain has been used to construct targeted knockout models of various tumor suppressor genes and oncogenes, thereby gaining a deeper understanding of pathways promoting colorectal cancer development. Its ability to form polarized structures and stable Cas9 expression make it an indispensable resource for basic gastroenterology research and the development of novel therapies for intestinal-related diseases.