ISRE-Luc/EF1α-mCherry Reporter Cell Line - HEK293

ISRE-Luc/EF1α-mCherry Reporter Cell Line - HEK293 is a human embryonic kidney 293 cell line engineered for sensitive monitoring of interferon-stimulated response element (ISRE) activity. The cells carry a luciferase reporter gene controlled by an ISRE-responsive promoter, enabling quantitative measurement of signaling events associated with type I interferons, including interferon alpha and beta. In addition, the cell line constitutively expresses mCherry fluorescent protein under the EF1α promoter. The red fluorescent marker supports convenient visualization of viable reporter cells, facilitates cell tracking, and helps assess culture consistency during routine handling. HEK293 cells provide a robust, easy-to-culture background with high transfection compatibility, making this reporter system suitable for reproducible cell-based assays. Following activation of interferon-related pathways, ISRE-dependent luciferase expression increases and can be measured by standard luminescence detection methods.

This reporter cell line is highly valuable for evaluating the activity, potency, and bioavailability of interferon-based therapeutics and cytokine-based drug candidates. It can be utilized to screen small molecules, biologics, antibodies, and nucleic acid-based drugs for their ability to activate or inhibit the JAK-STAT signaling pathway and its downstream ISRE-mediated transcriptional responses. The assay system is also instrumental in characterizing innate immune modulators, viral proteins, and immune evasion mechanisms that interfere with interferon signaling. Given the broad dynamic range, high sensitivity, and straightforward quantitative analysis offered by luciferase-based detection, this cell line is well-suited for medium- to high-throughput screening in drug discovery workflows. The constitutively expressed mCherry signal serves as an orthogonal, fluorescence-based reference for monitoring cell presence, morphology, transduction efficiency, or potential cytotoxicity. Furthermore, this cell line can be applied to mechanistic studies of interferon pathway regulation, comparative analysis of IFNAR-dependent responses, and the functional assessment of gene-editing or gene-expression interventions targeting various components of the interferon-response network.