The IPPK Knockout HEK293T Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population derived from HEK293T cells, designed for loss-of-function studies of the IPPK gene. This product comprises a heterogeneous pool of cells carrying CRISPR/Cas9-mediated disruptions in the IPPK locus, providing a robust model to investigate inositol phosphate metabolism and InsP6-dependent cellular processes without the constraints of clonal selection. The polyclonal format enables the study of population-level effects of IPPK disruption, reflecting the biological variability of knockout events.
HEK293T cells are immortalized human embryonic kidney epithelial cells that stably express the SV40 large T antigen. This genetic background facilitates episomal replication of plasmids containing the SV40 origin of replication, leading to high levels of recombinant protein expression. HEK293T cells are widely employed as a model for mammalian gene expression, cellular signaling assays, and viral packaging. Their epithelial origin and robust growth characteristics make them an ideal host for CRISPR/Cas9-mediated gene editing, providing a consistent and well-characterized cellular context for functional genomics studies.
IPPK encodes inositol-1,3,4,5,6-pentakisphosphate 2-kinase, which catalyzes the phosphorylation of inositol pentakisphosphate (InsP5) to generate inositol hexakisphosphate (InsP6). InsP6 acts as a multifunctional signaling molecule, regulating mRNA export through direct interaction with Gle1, modulating DNA repair via HDAC1/2 complex formation, and inhibiting NLRP3 inflammasome activation. IPPK functions downstream of insulin and growth factor receptor signaling cascades, integrating cellular energy status to control InsP6 levels. The IPPK knockout in HEK293T cells eliminates InsP6 synthesis, thereby disrupting these critical InsP6-dependent processes and revealing the role of IPPK in maintaining cellular homeostasis.
In the HEK293T background, IPPK knockout creates a powerful platform to dissect InsP6-mediated mechanisms in a human epithelial cell context. The elimination of InsP6 production impairs mRNA export, leading to nuclear accumulation of poly(A)+ RNA, and compromises DNA repair efficiency, as InsP6 is a cofactor for HDAC1/2-mediated deacetylation of DNA repair proteins. Additionally, InsP6 deficiency relieves inhibition of the NLRP3 inflammasome, promoting caspase-1 activation and IL-1?? secretion. These phenotypic alterations can be systematically analyzed using standard biochemical and cell biology techniques, making this model highly tractable for mechanistic investigations.
Researchers can employ this knockout model to investigate inositol phosphate signaling pathways and screen for IPPK inhibitors using mass spectrometry-based InsP6 quantification. Applications include studying DNA damage responses with ??H2AX immunofluorescence and comet assays, examining mRNA export defects via fluorescence in situ hybridization for poly(A)+ RNA, and assessing inflammasome activation through caspase-1 activity assays and IL-1?? ELISA. Furthermore, this model is valuable for diabetes research, exploring IPPK’s role in insulin secretion, and for cancer biology studies linking InsP6 to tumor suppression. For additional information or customized services, please contact Ascent Research.
