The IKBIP Knockout HT29 Polyclonal Cells represent a CRISPR/Cas9-edited heterogeneous population of HT29 human colorectal adenocarcinoma cells with disrupted IKBIP expression. This polyclonal knockout model offers a loss-of-function system to study IKBIP biology in a cellular context relevant to colorectal cancer.
HT29 cells originate from a primary colorectal adenocarcinoma of a 44-year-old Caucasian female and display adherent epithelial morphology. Notably, these cells carry a homozygous TP53 mutation (R273H), which disrupts p53 transcriptional activity and impairs DNA damage-induced apoptosis. The IKBIP knockout in this background provides a unique opportunity to analyze IKBIP function under p53-deficient conditions.
IKBIP is a p53-inducible pro-apoptotic protein that inhibits NF-??B signaling by directly interacting with IKK-beta (IKBKB). This binding prevents IKK-mediated phosphorylation of NFKBIA, leading to the retention of NF-??B in the cytoplasm and reduced RELA-driven transcription. Consequently, IKBIP promotes apoptosis via caspase activation downstream of DNA damage. The pathway involves TP53 upstream, IKBIP as a mediator, and downstream effectors including IKBKB, NFKBIA, RELA, BAX, and CASP3.
In colorectal adenocarcinoma, IKBIP links p53 tumor suppression to the blockade of pro-survival NF-??B signaling. Since HT29 cells lack wild-type p53, the IKBIP Knockout Polyclonal Cells allow dissection of p53-independent IKBIP functions and their impact on NF-??B activity and apoptosis. This model is instrumental for understanding how IKBIP loss may enhance NF-??B-driven survival, promoting colorectal tumor progression, especially in TP53-mutant contexts.
These polyclonal knockout cells are suitable for diverse assays including western blotting for protein expression analysis, NF-??B reporter assays, apoptosis measurements, and co-immunoprecipitation to confirm IKBIP?CIKBKB interactions. Transcriptomic analyses (RNA-seq) and immunofluorescence microscopy can further define the molecular signatures and subcellular changes upon IKBIP disruption. This model supports studies on colorectal cancer biology, p53-mediated tumor suppression, and NF-??B signaling regulation. For additional information, please contact Ascent Research.
