The ARMC8 Knockout HAP1 Polyclonal Cells product consists of a CRISPR/Cas9-edited polyclonal knockout cell population in which the ARMC8 gene has been disrupted in the human HAP1 near-haploid cell line. This polyclonal pool contains heterogeneous knockout alleles generated across the target locus, providing a robust loss-of-function model without reliance on a single clonal genotype. The product is designed for researchers investigating ARMC8-dependent cellular mechanisms, particularly its role in Wnt/??-catenin signal transduction and cell proliferation control.
The HAP1 cell line is a chronic myeloid leukemia-derived near-haploid line originally derived from KBM-7 cells. It exhibits a near-haploid karyotype, adherent and suspension growth properties, and a rapid doubling time, making it an ideal host for functional genomic studies. Its haploid status eliminates issues of functional redundancy and allelic compensation often encountered in diploid cell lines, thereby simplifying the interpretation of gene knockout phenotypes. HAP1 cells are widely used in haploid genetic screening, cancer biology, and drug target validation.
ARMC8 (Armadillo Repeat Containing 8) functions as a positive regulator of the canonical Wnt/???catenin pathway. Mechanistically, ARMC8 facilitates the nuclear translocation of ???catenin (CTNNB1) and enhances the transcriptional activity of the TCF/LEF complex, leading to increased expression of proliferation?associated genes such as MYC, CCND1, and MMP7. ARMC8 is activated downstream of WNT3A and EGF stimulation, and it forms complexes with CTNNB1 and CTNNA1. Within the Wnt pathway, ligand?bound Frizzled receptors activate DVL, which inhibits the destruction complex (comprising AXIN, GSK3??, and APC), thus stabilizing ???catenin. ARMC8 promotes this cascade by augmenting ???catenin nuclear accumulation and TCF4/LEF1?mediated transcription.
In the HAP1 near-haploid background, disruption of ARMC8 generates a clean loss-of-function model that directly impacts the Wnt/???catenin signaling axis. The polyclonal nature of the knockout pool ensures representation of diverse disruptive mutations, which minimizes the risk of clonal artifacts and improves the statistical robustness of downstream functional analyses. Loss of ARMC8 in these cells leads to impaired ???catenin nuclear localization and reduced TCF/LEF target gene expression, resulting in attenuated cell proliferation and migration, consistent with its reported oncogenic role in colorectal, lung, and liver cancers.
This polyclonal knockout model is well-suited for a variety of research applications, including the dissection of ARMC8-dependent regulation of cell cycle and migration, investigation of Wnt/???catenin pathway dynamics, and functional genomics screens using near-haploid cells. Representative assays with these cells include Western blotting for protein expression changes, RT?qPCR for target gene quantification, TOPFlash reporter assays to measure TCF/LEF transcriptional activity, MTT or BrdU proliferation assays, and transwell migration/invasion studies. For genome?wide expression profiling, RNA?seq can reveal transcriptomic alterations caused by ARMC8 loss. For further information, technical support, or customized cell engineering services, please contact Ascent Research.
