The CD59 Knockout MES-OV Polyclonal Cells are a polyclonal population of MES-OV mouse ovarian surface epithelial cells in which the CD59 gene has been disrupted using CRISPR/Cas9-mediated gene editing. This polyclonal knockout product provides a heterogeneous mixture of edited cells, each carrying distinct indel mutations at the target locus, resulting in loss of functional CD59 protein expression across the population. The cells are supplied as a ready-to-use knockout model for investigating the roles of CD59 in complement regulation, GPI-anchored protein signaling, and immune modulation in an ovarian epithelial cell context.
The MES-OV host cell line was derived from normal mouse ovarian surface epithelium and exhibits spontaneous immortalization, retaining key morphological and functional characteristics of ovarian surface epithelial cells. These cells are physiologically involved in follicular rupture and subsequent wound healing of the ovarian surface, making them a relevant model for studying ovarian epithelial biology, including processes such as proliferation, migration, and response to inflammatory signals. The MES-OV cell line serves as a valuable in vitro system for dissecting the molecular mechanisms underlying ovarian physiology and pathology, and its genetic perturbation enables precise functional studies in a controlled setting.
CD59 encodes a glycosylphosphatidylinositol (GPI)-anchored cell surface glycoprotein that is a critical negative regulator of the complement cascade. Mechanistically, CD59 binds to complement components C8 and C9, preventing the polymerization of C9 and thereby inhibiting the assembly of the membrane attack complex (MAC; C5b-9), thus protecting host cells from complement-mediated lysis. Beyond complement regulation, CD59 participates in signal transduction by associating with Src family kinases, including Lck and Fyn, within lipid rafts, which links GPI-anchored protein interactions to intracellular signaling cascades such as PI3K/AKT. Expression of CD59 is regulated by pro-inflammatory cytokines, including TNF-??, IL-1??, and IFN-??, frequently through NF-??B and STAT3 transcriptional pathways, thus integrating immune effector mechanisms with cellular survival signaling.
In the context of ovarian surface epithelial cells, CD59-mediated complement protection is particularly relevant during physiological processes such as ovulation, where follicular rupture generates a local inflammatory environment rich in complement factors. Loss of CD59 expression in MES-OV cells creates a model system to examine how ovarian epithelial cells withstand or succumb to complement attack, providing insights into ovarian tissue homeostasis and the immune microenvironment of the ovary. This knockout model also facilitates the study of GPI-anchored protein-dependent signaling pathways that may influence ovarian epithelial cell proliferation, migration, and transformation, with potential implications for understanding ovarian carcinogenesis and immune evasion mechanisms.
This CD59 knockout polyclonal cell product is ideally suited for a range of research applications, including complement-mediated cytotoxicity assays to assess susceptibility to membrane attack complex formation, and flow cytometric verification of CD59 surface loss. Researchers can utilize these cells to dissect GPI-anchor-mediated signaling by monitoring phospho-AKT levels and Src family kinase activation following ligand stimulation, or to screen small-molecule inhibitors of complement activation. Moreover, the model provides a platform for studying the interplay between complement regulation and ovarian epithelial cell behavior in wound healing, inflammation, and tumor immune escape. For further technical details or to order custom knockout cell populations, please contact Ascent Research.
