The DNAL1 Knockout A2780 Polyclonal Cells product consists of a polyclonal population of A2780 cells subjected to CRISPR/Cas9-mediated gene disruption targeting the DNAL1 gene. This polyclonal knockout pool encompasses a heterogeneous collection of alleles arising from non-homologous end joining repair, generating a loss-of-function model for DNAL1. The knockout approach yields a mixed population with varied mutations across the DNAL1 locus, suitable for studies where clonal variation is not a confound and where representing the average knockout effect across a population is advantageous. These polyclonal cells offer a genetically disrupted DNAL1 background in the A2780 host, enabling investigation of DNAL1-dependent processes without the need for single-cell cloning.
The A2780 cell line is a well-characterized human ovarian endometrioid adenocarcinoma line derived from an untreated patient. Notably, A2780 cells are cisplatin-sensitive, making them a valuable model for studying platinum-based chemotherapy response in ovarian cancer. As an epithelial ovarian cancer line, A2780 retains many features of high-grade serous ovarian carcinoma, including expression of relevant oncogenes and tumor suppressors. This line is widely used in cancer biology for examining drug resistance mechanisms, cell migration, and tumor cell signaling. Moreover, A2780 cells possess primary cilia, albeit with variable ciliation frequency under standard culture conditions, providing a context for examining ciliary protein function in an ovarian tumor setting.
DNAL1 encodes a light chain component of the outer dynein arm, a macromolecular motor complex essential for generating ciliary and flagellar movement. DNAL1 interacts directly with heavy chains (DNAH5, DNAH11) and intermediate chains (DNAI1) within the outer dynein arm, and its incorporation is critical for dynein arm assembly and stability. The expression of DNAL1 is transcriptionally regulated by ciliogenesis master regulators FOXJ1, RFX2, and RFX3. Functional outer dynein arms are required for rhythmic ciliary beating; therefore, DNAL1 disruption impairs ciliary beat frequency, which can consequently affect cilia-dependent signaling pathways. Ciliary motility is mechanistically linked to Hedgehog and Wnt signaling, both of which rely on the primary cilium for signal transduction. Additionally, mucociliary clearance??a process dependent on motile cilia in many epithelial tissues??is indirectly influenced by DNAL1 function. PDGFR?? signaling, which localizes to the ciliary membrane, may also be altered downstream of DNAL1 loss. Thus, DNAL1 knockout creates a molecular environment where dynein arm dysfunction leads to attenuated ciliary motility and potentially aberrant cellular signaling through pathways such as Hedgehog, Wnt, and PDGFR??, involving downstream effectors like GLI transcription factors and ??-catenin.
In the A2780 ovarian cancer model, DNAL1 knockout provides a unique tool to dissect the role of ciliary motility and cilia-dependent signaling in ovarian tumor biology. Although A2780 cells are not typically considered ciliated in all culture conditions, they retain the capacity to form cilia, and ciliary proteins may have non-ciliary functions in cancer. Disruption of DNAL1 in these cells allows investigation of whether outer dynein arm components contribute to ovarian cancer cell behavior, such as proliferation, migration, and cisplatin sensitivity. For instance, altered ciliary signaling through Hedgehog or Wnt pathways could modulate tumor cell plasticity or drug response. Furthermore, DNAL1 knockout may model aspects of ciliopathy-associated phenotypes, including defective mucociliary clearance, which could be relevant to the peritoneal dissemination environment of ovarian cancer. The polyclonal nature of the knockout population averages out clonal biases and is particularly suited for drug sensitivity screens where population-level responses are informative.
Researchers can employ DNAL1 Knockout A2780 Polyclonal Cells in a range of functional studies. Typical applications include examining the contribution of DNAL1 to ciliary protein localization via immunofluorescence for acetylated ??-tubulin, assessing DNAL1 protein levels by western blot, and measuring changes in expression of ciliary genes such as DNAH5 and RSPH4A by RT-qPCR. These knockout cells are also ideal for cell viability and cisplatin sensitivity assays to explore the link between ciliary motility and chemoresistance in ovarian cancer. Migration assays can determine whether DNAL1 loss impacts tumor cell motility, possibly through altered ciliary signaling or cytoskeletal interactions. Additionally, this model can be utilized to study ciliopathy-related mechanisms in a cancerous context, such as dysregulation of Hedgehog or Wnt signaling, and to screen small molecules that might rescue ciliary function or diminish oncogenic signaling. For further information or to discuss custom applications, please contact Ascent Research.
