The IL3 Knockout CAL-27 Polyclonal Cells are a polyclonal population of human CAL-27 tongue squamous cell carcinoma cells with CRISPR/Cas9-mediated disruption of the IL3 gene. This loss-of-function model retains polyclonal genetic heterogeneity, enabling unbiased assessment of IL-3-dependent phenotypes in cancer research.
The CAL-27 cell line, derived from a human tongue squamous cell carcinoma, is a widely used epithelial model for head and neck cancer biology. It recapitulates aggressive tumor features and serves as a platform for studying oncogenic signaling, tumor microenvironment interactions, and therapeutic interventions.
IL-3 is a hematopoietic growth factor that stimulates myeloid progenitor proliferation and differentiation. It binds the IL-3R?? (CD123)/CD131 heterodimer, activating JAK2 to phosphorylate STAT5 and STAT3, which promote expression of targets like Bcl-xL and Cyclin D1 for cell survival and cycle progression. IL-3 also triggers PI3K-AKT and RAS-MAPK/ERK pathways, enhancing growth and inhibiting apoptosis. In hematopoietic cells, IL-3 transcription is regulated by TCR activation, NFAT, and AP-1, mechanisms that may extend to epithelial tumor cells under certain conditions.
In head and neck cancer, IL-3 may participate in autocrine/paracrine loops influencing tumor proliferation and immune cell recruitment. Though primarily a hematopoietic factor, IL-3 and its receptor have been observed in solid tumors and stromal compartments. Disrupting IL3 in CAL-27 polyclonal cells enables dissection of endogenous IL-3 contributions to tumor cell survival, apoptosis resistance, and immune crosstalk, particularly via JAK2/STAT5 and PI3K/AKT signaling.
Representative assays for these polyclonal knockout cells include phospho-STAT5 flow cytometry, RT-qPCR for gene expression, proliferation and apoptosis assays, and cytokine array profiling. This model facilitates investigation of JAK/STAT pathway inhibitors and IL-3-driven paracrine effects in oral squamous cell carcinoma. For technical inquiries, contact Ascent Research.
