The AQP3 Knockout HAP1 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout population derived from the HAP1 cell line, providing a versatile tool for functional interrogation of the AQP3 gene. This heterogeneous pool is generated without single-cell cloning, capturing a broad spectrum of genetic variants and mimicking population-level biological complexity. It is particularly suited for high-throughput screening, large-scale functional genomics studies, and assays where averaging over multiple knockout alleles strengthens statistical robustness.
The HAP1 cell line is a near-haploid human model derived from KBM-7 chronic myelogenous leukemia (CML), exhibiting adherent, fibroblast-like morphology. Its haploid karyotype ensures that disruption of a single allele produces functional knockout, streamlining genetic perturbation studies. HAP1 cells are extensively used in CRISPR screens and functional genomics, offering a genetically tractable host for precise dissection of gene function.
Aquaporin-3 (AQP3) is a transmembrane channel facilitating water, glycerol, and urea transport, with key roles in skin hydration, cell proliferation, and migration. AQP3-mediated glycerol import fuels ATP production and supports membrane dynamic processes. At the molecular level, AQP3 is transcriptionally induced by EGF, Sp1, NFAT5, and HIF-1?? under hypertonic stress, and its function is modulated through interactions with caveolin-1, ezrin, and actin. AQP3 activity promotes downstream ERK1/2 phosphorylation and MMP2/9 secretion, establishing an EGFR-AQP3-ERK1/2 signaling module. Knockout of AQP3 disrupts glycerol uptake, thereby attenuating ERK/MAPK pathway activation, diminishing cell migration, and impairing skin barrier integrity.
In the haploid HAP1 background, AQP3 knockout provides a clean loss-of-function system free from compensatory allelic effects, enabling unambiguous assignment of phenotypes to AQP3 disruption. This model is highly relevant for skin biology research, including atopic dermatitis, psoriasis, and skin cancer, as well as for gastric and colon cancers where AQP3 overexpression correlates with aggressive tumor behavior. By abolishing AQP3-dependent glycerol metabolism and downstream MAPK/ERK signaling, researchers can directly link molecular mechanisms to functional outcomes in proliferation, migration, and invasion.
Typical downstream assays include quantitative western blotting and RT-qPCR for confirming AQP3 depletion, functional glycerol uptake assays to assess transport activity, and cell proliferation measurements via MTT or BrdU incorporation. Migration and invasion can be evaluated using wound healing and transwell assays, while immunofluorescence microscopy reveals AQP3 subcellular localization and actin cytoskeleton remodeling. Flow cytometry allows apoptosis quantification, and colony formation assays measure clonogenic survival. Transcriptome-wide RNA-seq analysis further uncovers gene expression changes driven by AQP3 loss, facilitating drug target validation, genetic interaction mapping, and mechanistic investigations into aquaporin biology and glycerol metabolism. For additional information or technical support, please contact Ascent Research.
