The IRGQ Knockout Ca Ski Polyclonal Cells product comprises a CRISPR/Cas9-edited polyclonal knockout cell population derived from the Ca Ski human cervical carcinoma epithelial cell line. This model disrupts the IRGQ gene, which encodes a putative interferon-inducible GTPase implicated in innate immunity and autophagy. The polyclonal knockout population provides a heterogeneous genetic background that mitigates clonal selection artifacts, making it suitable for functional studies requiring representative cellular responses. The cells retain the HPV-16-positive status of the parental Ca Ski line, enabling investigations into host?Cpathogen interactions and oncogenic signaling in a relevant cervical cancer context. This knockout tool enables systematic dissection of IRGQ-dependent pathways without the confounding effects of monoclonal selection.
The Ca Ski host cell line is a well-characterized model of HPV-16-positive human cervical squamous carcinoma. Derived from a metastatic cervical cancer, these epithelial cells harbor integrated human papillomavirus type 16 genomes and express viral oncoproteins E6 and E7, which disrupt p53 and Rb tumor suppressor pathways. This genetic background establishes a pro-tumorigenic environment with dysregulated cell cycle control and altered innate immune signaling. The Ca Ski line is widely employed to study cervical cancer biology, viral oncogenesis, and the interplay between interferon responses and HPV-driven transformation. Its stable HPV-16 positivity ensures consistent experimental conditions for examining viral?Chost interactions and therapeutic interventions targeting interferon or autophagy pathways.
IRGQ encodes an interferon-inducible GTPase that functions within the broader IRG (immunity-related GTPase) family. Upon interferon stimulation, notably by interferon-gamma (IFNG) and interferon-alpha/beta, IRGQ expression is transcriptionally upregulated through the JAK1/STAT1/IRF1 signaling axis. Mechanistically, IRGQ likely participates in autophagy-mediated defense against intracellular pathogens by translocating to pathogen-containing vacuoles and promoting their fusion with lysosomes. This process is thought to involve interactions with key autophagy machinery, including ATG5 and LC3 family members (e.g., LC3B), as well as the related GTPase IRGM. Downstream, IRGQ activity is linked to the recruitment of lysosomal markers such as LAMP1, facilitating vacuolar acidification and cargo degradation. Thus, IRGQ integrates interferon signals with autophagic degradation pathways, positioning it as a critical node in host innate immunity.
In the Ca Ski cervical carcinoma background, disruption of IRGQ provides a unique opportunity to dissect its role in cancer-associated autophagy and immune evasion. HPV oncoproteins are known to modulate interferon responses and autophagy, and IRGQ may represent a link between these processes. Loss of IRGQ could affect the ability of cells to undergo interferon-induced autophagy, potentially impacting tumor cell survival, antigen presentation, or clearance of intracellular pathogens. This model is particularly relevant for exploring how HPV-16-positive cancer cells subvert innate immune pathways and for assessing the functional consequences of impaired autophagy in tumor progression and metastasis. Moreover, the polyclonal nature ensures that downstream phenotypes reflect broader cellular heterogeneity, increasing translational relevance.
Researchers can employ the IRGQ Knockout Ca Ski Polyclonal Cells in a range of experimental assays. Western blotting for IRGQ, LC3B, and p62 enables quantification of autophagic flux, while confocal microscopy can visualize LC3 puncta formation and co-localization with LAMP1 to assess autolysosome maturation. RT-qPCR profiling of IRGQ and other interferon-stimulated genes reveals transcriptional responses to interferon stimulation. Functional assays such as colony formation and cell migration provide insights into tumorigenic potential, and pathogen clearance assays facilitate host-defense studies. These tools are instrumental for investigating interferon-induced autophagy in cervical carcinoma, the role of IRGQ in cancer immune evasion, and host?Cpathogen interactions. For further details on validation data or technical support, please contact Ascent Research.
