The INPP5F knockout HeLa polyclonal cells are a CRISPR/Cas9-mediated gene-disrupted cell population derived from the HeLa cell line, engineered to ablate INPP5F function. This polyclonal knockout format comprises a heterogeneous pool of cells bearing diverse editing events, recapitulating a more physiological loss-of-function context than clonal lines. It is a versatile tool for interrogating INPP5F-dependent phenotypes in a robust, high-throughput compatible system.
HeLa cells originate from a human cervical adenocarcinoma and are immortalized through HPV18 integration, retaining epithelial characteristics. This cell line is a cornerstone of biomedical research, extensively used to dissect oncogenic signaling, intracellular trafficking, and cell cycle regulation. Its well-characterized genome and rapid proliferation facilitate the generation and expansion of knockout models, ensuring reproducible results across independent experiments.
INPP5F functions as a phosphatidylinositol 4,5-bisphosphate 5-phosphatase that selectively dephosphorylates PIP3 to PIP2, directly opposing PI3K-mediated signal propagation. It is positioned downstream of growth factor receptors such as EGFR and IGF1R, which are stimulated by ligands including EGF and insulin. By limiting PIP3 accumulation, INPP5F suppresses AKT phosphorylation and mTOR activation, while simultaneously influencing endosomal trafficking and actin cytoskeleton remodeling. This protein interacts with PI3K regulatory subunits, components of the endosomal sorting machinery, and actin-binding proteins including cofilin and the Arp2/3 complex, thereby coupling lipid signaling to membrane dynamics and cell motility.
In the HeLa cellular environment, INPP5F disruption is predicted to elevate basal PIP3 levels and sustain AKT activity, leading to enhanced proliferation, altered migration, and perturbed endocytic flux. Given HeLa??s widespread use as a cancer model, this knockout system enables dissection of how negative PI3K/AKT regulators impact tumor cell behavior, including invasion and drug sensitivity. The HPV18-positive background further allows investigation of potential crosstalk between viral oncoproteins and host PI3K signaling, an area relevant to cervical cancer pathogenesis.
Researchers can employ this polyclonal population in diverse assays: Western blotting for phospho-AKT and downstream mTOR targets, immunofluorescence imaging of PIP3 and endosomal markers, transferrin uptake kinetics for endocytosis, and transwell migration/invasion assays. It is also suitable for flow cytometric cell cycle analysis, drug resistance profiling, and siRNA or compound library screens to identify synthetic lethal partners. The model may extend to neurological disorder research and Lowe syndrome, where INPP5F-linked trafficking defects are implicated. For detailed validation data or technical support, please contact Ascent Research.
