The ATF2 Knockout SK-HEP-1 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population derived from the human SK-HEP-1 liver adenocarcinoma cell line. This product provides a loss-of-function model of activating transcription factor 2 (ATF2) in a well-characterized hepatic cancer background, enabling researchers to dissect ATF2-dependent cellular processes. The polyclonal population, generated by CRISPR/Cas9-mediated gene disruption, obviates the need for single-cell cloning, thereby preserving population heterogeneity and reducing clonal selection artifacts while maintaining targeted ATF2 inactivation.
The SK-HEP-1 host cell line was established from the ascitic fluid of a patient with liver adenocarcinoma and displays endothelial-like characteristics, including the expression of certain vascular markers and the ability to form tube-like structures in vitro. These unique properties make SK-HEP-1 a valuable model not only for hepatocellular carcinoma but also for studies of tumor angiogenesis and metastatic dissemination. The cell line??s aggressive phenotype and rapid growth kinetics facilitate high-throughput screenings and functional assays relevant to liver cancer biology.
ATF2 is a basic leucine zipper transcription factor that mediates cellular responses to a variety of stress stimuli. It is primarily activated through phosphorylation by the c-Jun N-terminal kinase (JNK) and p38 mitogen-activated protein kinases (MAPK14) following upstream signals from TAK1, MEKK1, and MKK4/7. Once phosphorylated, ATF2 forms heterodimers with c-Jun or homodimers and binds to cAMP response element (CRE)/AP-1 regulatory sequences in the genome, modulating the transcription of target genes such as cyclin D1, c-Jun, ATF3, TGF-??, and IFN-??. Additionally, ATF2 interacts with numerous co-regulators, including p300/CBP, NF-??B, Smad3, and HDAC1, integrating stress signaling with other transcriptional networks. Representative pathway axes include JNK??ATF2??cyclin D1, p38??ATF2??c-Jun, and TGF-?¡?TAK1??p38??ATF2, underscoring its role as a signaling hub.
In the context of liver adenocarcinoma, ATF2 influences critical cell fates such as proliferation, apoptosis, and DNA damage response, and its dysregulation has been implicated in hepatocellular carcinoma progression and therapeutic resistance. The SK-HEP-1 background, with its endothelial-like features, offers a unique system to explore how ATF2 contributes to tumor invasion, extravasation, and the interplay between cancer cells and the vascular microenvironment. The polyclonal knockout cells provide a reproducible tool to interrogate these functions without the confounding influences of clonal variation, enabling more robust conclusions about ATF2-dependent phenotypes.
This knockout model is suited for a broad range of applications, including the investigation of ATF2-mediated transcriptional regulation in liver cancer, assessment of stress signaling mechanisms, and evaluation of drug sensitivity and resistance. Researchers can employ western blotting to detect ATF2 and its phosphorylated forms, RT-qPCR to measure downstream target expression, MTT assays for proliferation, transwell migration and invasion assays, luciferase reporter assays for transcriptional activity, and flow cytometric apoptosis assays using Annexin V/PI staining. For further information, please contact Ascent Research.
