PTEN Knockout HAP1 Cell Line

The choice depends on whether you are studying PTEN's role as the principal PI3K pathway tumor suppressor or its specific contributions distinct from other phosphatases. The Knockout line is the standard tool for asking whether PTEN is required for restraining PI3K-AKT-mTORC1 signaling — PTEN converts PI(3,4,5)P3 back to PI(4,5)P2, antagonizing PI3K activity. Overexpression is useful for studying PTEN tumor suppressor functions or for testing rescue with structure-function variants. For PI3K pathway research, the EDITGENE PTEN Knockout in HAP1 is a workhorse mechanistic platform — PTEN loss is one of the most common cancer-associated alterations and creates a defined PI3K-active genetic background. This product complements the parallel PTEN Knockout in BEAS-2B (also available); HAP1 is preferred for biochemistry and clean loss-of-function studies. Rescue with wild-type, lipid-phosphatase-dead (C124S), or protein-phosphatase-dead (G129E) PTEN enables dissection of lipid versus protein phosphatase functions. Cowden syndrome and PTEN hamartoma tumor syndrome variants enable disease modeling.

Primary applications: • PI3K-AKT pathway: phospho-AKT (S473, T308), phospho-S6, phospho-4E-BP1 analysis to characterize PI3K-mTORC1 pathway hyperactivation following PTEN loss. • Lipid versus protein phosphatase studies: rescue with C124S (lipid-phosphatase-dead) or G129E (protein-phosphatase-dead) variants to dissect dual phosphatase functions. • Cowden syndrome modeling: rescue with patient-derived PTEN mutations for genotype-function studies. • PI3K inhibitor sensitization: dose-response analysis for PI3K inhibitors (idelalisib, alpelisib, copanlisib) in PTEN-null versus rescued cells. EDITGENE recommends this HAP1-based model for biochemical PI3K pathway research and PTEN structure-function studies; the parallel PTEN Knockout in BEAS-2B is preferred for lung cancer initiation research.

Yes. PTEN rescue experiments are well-established for tumor suppressor research: • Construct design: use a codon-modified PTEN sequence with a small C-terminal tag (FLAG, HA). PTEN has N-terminal phosphatase domain, C2 domain, and C-terminal tail — preserve all elements. • Lipid-phosphatase-dead rescue: the C124S mutation abolishes both lipid and protein phosphatase activities; the G129E mutation selectively abolishes lipid phosphatase activity while preserving protein phosphatase — enabling dissection of dual phosphatase functions. • Cowden syndrome rescue: patient-derived PTEN mutations (e.g., R130G, R335X) enable disease genotype-function studies. • Functional readout: rescue should restore PI(3,4,5)P3 dephosphorylation, suppress phospho-AKT levels, and restore PI3K pathway homeostasis. HAP1-specific considerations: • Diploidization: HAP1 cells gradually diploidize during extended culture — confirm ploidy by flow cytometry at the time of phenotypic assay. • Integration site sensitivity: position effects on transgene expression are more pronounced in near-haploid backgrounds; generating multiple independent rescue clones is strongly recommended. • Transduction efficiency: HAP1 transduces with lentivirus at moderate efficiency — increase MOI compared to standard immortalized lines.