The BTN1A1 Knockout HeLa Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population derived from the HeLa cell line, featuring targeted disruption of the butyrophilin family gene BTN1A1. This loss-of-function model enables investigation of BTN1A1??s roles in immune modulation and epithelial biology without clonal selection. The polyclonal format captures a heterogeneous array of editing events, making it suitable for studies where population-level effects are desired. These cells serve as a versatile platform for functional genomics, drug target validation, and mechanistic inquiry.
The parental HeLa line is an HPV18-positive cervical adenocarcinoma-derived epithelial cell line with inactivated p53 and Rb, widely used in cancer research. This immortalized line provides a robust and clinically relevant backdrop for examining gene function in the context of HPV-driven oncogenesis and tumor-immune interactions. The BTN1A1 knockout in HeLa offers an isogenic system to dissect pathways pertinent to cervical cancer biology.
BTN1A1 is a transmembrane immunoglobulin superfamily member with dual roles in T cell co-inhibition and milk fat globule secretion. In immune contexts, it suppresses T cell activation by engaging uncharacterized receptors and recruiting SHP-1/SHP-2 phosphatases via ITIM-like motifs, leading to reduced IL-2 and IFN-?? production and inhibition of T cell proliferation. Its expression is regulated by prolactin, STAT5, IFN-??, and NFAT transcription factors. In mammary epithelium, BTN1A1 binds xanthine oxidoreductase (XDH) and recruits perilipin-2 (PLIN2) to facilitate lipid droplet secretion. Thus, BTN1A1 intersects T cell receptor signaling (involving CD3 and ZAP70) with lipid trafficking, bridging immune checkpoint control and cellular secretion.
In HeLa cells, BTN1A1 knockout addresses the contribution of butyrophilin-mediated immune evasion in HPV-positive cervical adenocarcinoma. Because HeLa cells harbor viral oncoproteins that dampen host immunity, removing an endogenous co-inhibitory molecule may expose critical nodes in tumor-T cell interactions and help delineate BTN1A1??s role alongside established checkpoints. This model also permits exploration of potential epithelial-intrinsic functions of BTN1A1, such as in cell adhesion or secretory pathways, which could influence cancer progression.
The knockout population is suited for functional assays including T cell co-culture systems coupled with CFSE proliferation readouts and ELISA for IL-2/IFN-??, as well as flow cytometry for activation markers. Downstream signaling can be examined via western blotting for phospho-ZAP70 and SHP-1 interactions. Lipid biology applications utilize staining and secretion assays to mimic milk fat globule processes. Transcriptomic analysis (RNA-seq) of wild-type versus knockout cells enables global pathway discovery. This product supports immune checkpoint target validation, tumor microenvironment research, and secretory pathway modeling. For further details, please contact Ascent Research.
