The IL3 Knockout LoVo Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout population in which the IL3 gene has been disrupted within the LoVo human colorectal adenocarcinoma cell line. This polyclonal format provides a heterogeneous loss-of-function model, enabling robust functional genomic studies without clonal selection artifacts. These cells are ideally suited for investigating interleukin-3 (IL3)-dependent mechanisms in a metastatic colorectal cancer context.
LoVo cells originated from a supraclavicular lymph node metastasis of colorectal adenocarcinoma and harbor oncogenic mutations in APC and KRAS, leading to constitutive activation of Wnt and MAPK pathways. As a well-characterized model for metastatic colorectal cancer, this cell line recapitulates key features of tumor progression and drug resistance. The IL3 knockout in this background permits dissection of cytokine cross-talk with established oncogenic drivers.
IL3 is a hematopoietic growth factor that signals through a heterodimeric receptor (IL3RA/CSF2RB) to activate JAK2, which phosphorylates STAT5 and initiates PI3K/AKT and RAS/MAPK cascades. Downstream effectors include Bcl-xL, Cyclin D1, and ERK, promoting proliferation and survival. Knockout of IL3 abrogates these signals, eliminating cytokine-driven activation of STAT5, AKT, and ERK, thereby impairing downstream transcriptional programs.
In the LoVo metastatic colorectal cancer model, autocrine or paracrine IL3 signaling may influence tumor cell growth, apoptosis resistance, or microenvironment interactions. Although IL3 is not a primary colorectal oncogene, its receptor components can be expressed in tumor and stromal cells. Disrupting IL3 enables investigation of its potential contributions to inflammatory modulation and immune cell crosstalk within the tumor milieu.
Typical applications include western blotting for phospho-STAT5 and phospho-AKT to verify pathway inhibition, RT-qPCR and ELISA to quantify IL3 and target gene expression, and cell proliferation or apoptosis assays to assess functional consequences. Co-culture migration and invasion studies further explore paracrine effects. This model supports research in cytokine biology, tumor microenvironment, drug resistance, and functional genomics. For more information, contact Ascent Research.
