The KLF12 Knockout NCI-H1975 Polyclonal Cells comprise a CRISPR/Cas9-edited polyclonal population derived from the NCI-H1975 human lung adenocarcinoma cell line, in which the KLF12 gene has been disrupted to abolish its expression and function. This polyclonal knockout model is designed for investigating the tumorigenic and signaling roles of KLF12 in an EGFR-mutant non-small cell lung cancer (NSCLC) background.
The NCI-H1975 cell line is a well-characterized model of metastatic lung adenocarcinoma, established from a female patient and harboring compound EGFR mutations (L858R and T790M) while retaining wild-type TP53. These genetic features render the cells reliant on EGFR-driven signaling and susceptible to acquired resistance against first- and second-generation tyrosine kinase inhibitors (TKIs), making them a crucial platform for studying EGFR-targeted therapy resistance mechanisms.
KLF12 (Kr??ppel-like factor 12) is a zinc-finger transcription factor that functions predominantly as a transcriptional repressor, recruiting corepressor complexes containing CtBP1, Sin3A, and histone deacetylases HDAC1/2 to dampen expression of cell cycle inhibitors such as CDKN1A (p21) and pro-apoptotic BCL2 family members. Upstream, KLF12 is regulated by the TGF-??/Smad axis??via TGFBR1 and SMAD2/3 phosphorylation??and by the ERK/MAPK cascade, while also intersecting with the Wnt/??-catenin pathway through interactions with ??-catenin and TCF/LEF transcription factors. Consequently, KLF12 orchestrates a repressive transcriptional network that controls proliferation, apoptosis, and differentiation.
In the NCI-H1975 background, disruption of KLF12 eliminates its repressive influence on CDKN1A and pro-apoptotic factors, which can lead to enhanced cell cycle arrest and apoptosis, thereby altering the delicate balance between proliferation and survival signals. This loss-of-function model is particularly valuable for dissecting how KLF12 contributes to EGFR TKI resistance and metastatic behavior, as the EGFR mutant context may engage overlapping or compensatory pathways. Moreover, the knockout enables study of potential synthetic lethal interactions or novel combinatorial therapeutic strategies.
Researchers can employ this polyclonal knockout population for a broad range of functional assays, including Western blotting and RT-qPCR to confirm gene editing and target expression changes, MTT/XTT and colony formation assays for proliferation, Annexin V staining and caspase activity measurements for apoptosis, and migration/invasion assays such as wound healing or Transwells to assess metastatic potential. Chromatin immunoprecipitation coupled with quantitative PCR (ChIP-qPCR) allows direct examination of KLF12 binding at target gene promoters. The model supports investigations into KLF12??s role as a potential tumor suppressor or oncogene in NSCLC, as well as studies on EGFR TKI resistance mechanisms and cell cycle regulation. For further information or to inquire about custom cell engineering services, please contact Ascent Research.
