The DNAAF2 Knockout NCI-H1299 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal cell population derived from the NCI-H1299 non-small cell lung carcinoma cell line. This product harbors a heterogeneous mix of targeted gene disruptions within the DNAAF2 locus, generated through CRISPR/Cas9-mediated genome editing. The polyclonal format provides a convenient and robust loss-of-function model without the need for single-cell cloning, enabling pooled studies of DNAAF2 deficiency. These cells serve as a valuable tool for dissecting the molecular functions of DNAAF2 in ciliary biology and cancer research.
The parental NCI-H1299 cell line was established from a lymph node metastasis of a lung adenocarcinoma patient and is widely employed as a model for studying non-small cell lung cancer biology. These cells exhibit epithelial morphology and retain characteristic features of lung adenocarcinoma, including key oncogenic pathways. The absence of functional DNAAF2 in this tumor-derived background allows for the investigation of both ciliary and potentially non-ciliary roles of the gene in a clinically relevant disease context.
DNAAF2 (dynein axonemal assembly factor 2) is a cytoplasmic protein required for ciliary motility through its role in preassembling axonemal dynein motor complexes. It functions within a chaperone network involving DNAAF1, DNAAF3, HSP70, HSP90, and RUVBL1/2 to mediate the assembly of outer and inner dynein arms. The transcription factors FOXJ1, RFX3, and MCIDAS promote DNAAF2 expression as part of the ciliogenesis transcriptional program. Properly assembled dynein arms, which contain components such as DNAH5 and DNAI1, are critical for generating ciliary beat frequency and driving mucociliary clearance. CRISPR/Cas9-mediated disruption of DNAAF2 therefore abrogates dynein arm formation, resulting in immotile cilia and loss of ciliary function.
In the context of the NCI-H1299 lung cancer model, DNAAF2 knockout enables the study of ciliary dysfunction within a tumor microenvironment. Although primary ciliary dyskinesia and Kartagener syndrome are the canonical diseases associated with DNAAF2 mutations, emerging evidence suggests that ciliary signaling can influence cancer cell behavior. This knockout model allows researchers to explore how loss of ciliary motility affects epithelial differentiation, cell migration, and metastatic potential in lung adenocarcinoma. Moreover, the interplay between DNAAF2-mediated ciliary assembly and cancer-relevant pathways can be examined, providing insight into the broader roles of axonemal dynein factors.
Key research applications include functional genomics of ciliogenesis, drug target validation for primary ciliary dyskinesia, and exploration of non-ciliary roles in lung cancer. Users can employ western blotting, RT-qPCR, and immunofluorescence for ciliary markers to confirm knockout and assess ciliary assembly. Functional assays such as ciliary beat frequency analysis and mucociliary clearance measurements provide direct readouts of motility defects. Cell proliferation and migration assays are applicable for cancer phenotype studies. For further assistance, contact Ascent Research.
