The EIF2D Knockout MES-OV Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population derived from the MES-OV human ovarian endometrioid carcinoma cell line. This product enables targeted disruption of the EIF2D gene, which encodes a translation initiation factor that facilitates ribosomal scanning and reinitiation on mRNAs harboring upstream open reading frames (uORFs). The polyclonal population preserves heterogeneous genetic edits generated by CRISPR/Cas9, providing a robust loss-of-function model for investigating EIF2D-dependent translational control without clonal selection artifacts.
The MES-OV cell line originates from a human ovarian endometrioid carcinoma, a subtype of epithelial ovarian cancer. These cells retain key genomic and phenotypic features of the parental tumor, making them a relevant in vitro model for studying ovarian cancer biology, including tumorigenesis, metastasis, and therapeutic resistance. MES-OV cells express wild-type components of the translational machinery and stress signaling pathways, thereby providing a suitable background for dissecting the role of EIF2D in cancer-associated translation reprogramming.
EIF2D is a specialized translation initiation factor that interacts with the 40S ribosomal subunit, MCTS1, and DENR to promote reinitiation on uORF-containing transcripts, particularly when ternary complex (eIF2?CGTP?CMet-tRNAi) levels are reduced during stress. EIF2D activity is modulated by upstream regulators including eIF2 kinases (GCN2, PERK, PKR), which phosphorylate eIF2?? in response to amino acid deprivation, ER stress, and other insults, and by mTORC1 signaling. Upon EIF2D disruption, stress-induced translation of downstream effectors such as ATF4 and CHOP is impaired, while the expression of other uORF-dependent targets like c-MYC is altered. Consequently, EIF2D knockout reshapes the integrated stress response and mTOR/S6K1/4E-BP1 axis, thereby affecting cell survival and proliferation under stress.
In the context of MES-OV ovarian carcinoma cells, EIF2D loss-of-function disrupts the adaptive translational reprogramming that supports tumor cell fitness under adverse conditions, including nutrient deprivation and chemotherapeutic stress. This knockout model enables mechanistic dissection of how EIF2D-mediated reinitiation contributes to oncogenic translation, stress resilience, and malignant progression in ovarian cancer. Furthermore, it offers a platform to investigate the crosstalk between the integrated stress response and mTOR signaling in a disease-relevant cellular background.
This polyclonal knockout pool supports a wide range of investigative approaches, including polysome profiling to assess global translation changes, Western blotting for key markers such as ATF4, CHOP, and phosphorylated eIF2??, and RT-qPCR of uORF-containing transcripts. Functional studies can incorporate cell viability, migration, and invasion assays under endoplasmic reticulum stress or nutrient limitation, as well as drug sensitivity profiling to identify vulnerabilities associated with EIF2D loss. Additionally, the cells are suitable for transcriptomic and proteomic analyses to delineate EIF2D-dependent gene expression networks in ovarian cancer. For further details, please contact Ascent Research.
