The HDAC6 Knockout NCI-H1299 Polyclonal Cells are CRISPR/Cas9-edited polyclonal knockout cells derived from the human NCI-H1299 non-small cell lung cancer line. This loss-of-function model targets the HDAC6 gene, a cytoplasmic deacetylase regulator of microtubule dynamics, autophagy, and cell motility. The polyclonal population avoids clonal selection bias, offering a heterogeneous genetic knockout background.
The NCI-H1299 host line originates from a metastatic lung adenocarcinoma lymph node and is widely used in NSCLC research. Its p53 deficiency and invasive phenotype make it ideal for studying cancer cell migration, metastasis, and drug resistance. The established utility in autophagy and signaling studies further supports HDAC6 functional analysis in this context.
HDAC6 deacetylates non-histone substrates including alpha-tubulin and cortactin, directly controlling microtubule stability and actin remodeling. Upstream, it is activated by EGF, IL-6, and cellular stress, integrating signals from EGFR?CERK?CAKT and TGF-beta?CSMAD2/3 pathways. Downstream, deacetylation of alpha-tubulin and cortactin governs cell migration, while interactions with p62/SQSTM1, ubiquitin, and tau facilitate aggresome formation and autophagy. HDAC6 knockout disrupts these functions, impairing aggresome processing, reducing motility, and sensitizing cells to proteasome inhibitors like bortezomib.
In the NCI-H1299 background, HDAC6 loss is particularly impactful due to p53 deficiency and its metastatic origin. HDAC6-mediated aggresome-autophagy is a critical proteotoxic stress response in cancer; its absence compromises protein quality control and increases proteasome inhibitor sensitivity. Additionally, reduced alpha-tubulin deacetylation hyperstabilizes microtubules, directly inhibiting focal adhesion dynamics and cell migration??key determinants of metastasis. This model thus uniquely illuminates the intersection of protein homeostasis and oncogenic signaling.
Applications include migration and invasion assays (scratch wound, transwell), aggresome formation and autophagy flux analyses, and bortezomib sensitivity testing. The polyclonal population is well-suited for immunofluorescence and western blotting of acetylated tubulin, and for neurodegenerative disease models requiring HDAC6-dependent aggresome clearance. It provides a robust platform for functional genomics without clonal artifacts. For further technical information, please contact Ascent Research.
