The HTT Knockout NCI-H1975 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal cell population derived from the NCI-H1975 human lung adenocarcinoma epithelial cell line, carrying a targeted disruption of the HTT gene. This loss-of-function model enables investigation of huntingtin (HTT) protein function in a non-small cell lung cancer (NSCLC) context. The polyclonal knockout pool provides a heterogeneous population of cells with edited HTT alleles, suitable for bulk population-level analyses, circumventing clonal variability. Researchers can use this product to dissect HTT-dependent mechanisms in cancer biology, autophagy, and neurodegeneration.
The host cell line NCI-H1975, isolated from the pleural effusion of a 58-year-old female with lung adenocarcinoma, serves as a well-characterized NSCLC model. Notably, it harbors wild-type EGFR and KRAS, making it particularly relevant for studying signaling networks independent of these common oncogenic mutations. These adherent, epithelial-derived cells display robust growth and are widely employed in drug sensitivity screens, migration assays, and pathway analyses. Their genetic background provides a clean platform to assess the functional impact of HTT loss without confounding oncogene-addicted signaling.
The HTT gene encodes huntingtin, a large scaffold protein (approximately 350 kDa) that orchestrates diverse cellular processes through its interactions with numerous partners. HTT functions upstream of autophagy regulators including ULK1, BECN1, ATG7, and MAP1LC3B, and is critically involved in endosomal trafficking via associations with HAP1, HIP1, HIP14, Dynamin1, and PACSIN1. It is regulated by kinases such as AKT and CDK5, and transcriptionally controlled by CREB and SP1. Downstream, HTT influences apoptosis through BCL2, CASP3, CASP9, and PARP1, and modulates BDNF transcription. The PI3K/AKT/MTOR signaling axis is intimately linked with HTT function, as AKT-mediated phosphorylation regulates HTT??s scaffolding activities and its role in autophagy initiation.
In the NCI-H1975 adenocarcinoma background, HTT knockout disrupts autophagy flux and endosomal trafficking, potentially leading to impaired clearance of protein aggregates and heightened cellular stress. This perturbation is expected to alter cellular proliferation, apoptosis, and migration through dysregulation of AKT/MTOR signaling and downstream effectors such as GSK3B and TP53. The polyclonal knockout model allows researchers to examine how HTT loss affects lung cancer cell behavior, including anchorage-independent growth, invasiveness, and response to chemotherapeutic agents, thereby revealing potential vulnerabilities that could be exploited therapeutically in NSCLC.
This knockout cell product is applicable to a wide array of experimental designs, including mechanistic studies of autophagy using LC3B-II turnover assays with chloroquine treatment, apoptosis evaluation via Annexin V/PI flow cytometry, and proliferation measurements with MTT or CellTiter-Glo. Researchers can also perform co-immunoprecipitation to map HTT protein interaction networks, immunofluorescence to track HTT subcellular localization, and migration/invasion assays using Transwell or scratch wound methods. Genotyping PCR and Sanger sequencing confirm HTT disruption. The model is well-suited for drug screening campaigns aimed at identifying HTT pathway modulators and for assessing off-target effects of HTT-lowering therapeutics. For further inquiries, please contact Ascent Research.
