The GLI3 Knockout HEK293T Polyclonal Cells represent a CRISPR/Cas9-edited polyclonal knockout cell population derived from the HEK293T human embryonic kidney line, engineered to disrupt the GLI3 gene. This product delivers a heterogeneous pool of cells harboring targeted gene disruption events, offering a versatile loss-of-function model that does not rely on clonal selection. The polyclonal format captures a spectrum of editing outcomes, making it particularly useful for studying GLI3-dependent processes in a high-efficiency, reproducible system. This population is well-suited for researchers investigating Hedgehog signaling, transcription factor biology, and disease mechanisms in an established expression host.
HEK293T is an immortalized, adherent epithelial cell line of human embryonic kidney origin that stably expresses the SV40 large T antigen. This characteristic enables episomal replication of plasmids containing the SV40 origin, resulting in remarkably high levels of recombinant protein production. The cell line is widely adopted across molecular and cellular biology for its robust growth kinetics, high transfection efficiency, and compatibility with a broad array of functional assays. Its epithelial background and well-mapped signaling networks provide a reliable platform for dissecting gene function and pathway crosstalk, although it is not natively responsive to Hedgehog ligands, allowing isolation of GLI3 activity from pathway auto-feedback.
GLI3 is a zinc-finger transcription factor that functions as both a transcriptional activator and repressor within the Hedgehog (Hh) signaling cascade, playing a pivotal role in embryonic patterning, limb development, and tissue homeostasis. In the absence of Hh ligand, GLI3 undergoes sequential phosphorylation by protein kinase A (PKA), casein kinase 1 (CK1), and glycogen synthase kinase 3?? (GSK3??), which promotes ubiquitination by the E3 ligase SPOP and proteasomal processing to generate a truncated repressor form. This repressor translocates to the nucleus and silences target genes such as PTCH1, GLI1, and HHIP. Upon SHH binding to Patched 1 (PTCH1), Smoothened (SMO) is released from inhibition, leading to dissociation of Suppressor of Fused (SUFU) from full-length GLI3. Stabilized full-length GLI3 accumulates and, with cofactors like CBP/p300 and KIF7, activates transcription of downstream effectors including CCND1, MYCN, and FOXA2. Interactions with additional regulators such as STK36, ARRB1, ZIC1, and ZIC2 further fine-tune GLI3 output.
In the HEK293T context, GLI3 knockout provides a clean genetic background to dissect its dual regulatory roles without confounding effects from endogenous Hedgehog pathway feedback. This model is instrumental for probing GLI3-mediated gene regulation, its intersection with the Wnt signaling pathway, and its contributions to cellular proliferation and migration. Researchers can reconstitute wild-type or mutant GLI3 variants to study genotype-phenotype relationships relevant to congenital disorders including Greig cephalopolysyndactyly syndrome, Pallister-Hall syndrome, and polydactyly types. Moreover, the system supports investigation of GLI3??s oncogenic potential in medulloblastoma and basal cell carcinoma, offering insights into aberrant Hh signaling in cancer.
The GLI3 knockout polyclonal population supports a wide range of quantitative and functional assays. Western blotting and RT-qPCR enable monitoring of GLI3 target expression (e.g., PTCH1, GLI1, HHIP), while RNA-seq provides global transcriptome profiling. Immunofluorescence and ChIP-qPCR visualize subcellular localization and chromatin occupancy, and luciferase reporter assays quantify transcriptional activity downstream of GLI3. Co-immunoprecipitation is suited for probing interactions with SUFU, CBP/p300, or SPOP, and flow cytometry facilitates cell cycle or apoptosis analyses. Drug sensitivity screening with SMO antagonists, migration assays, and high-throughput functional genomics further extend the model??s utility. For additional information, please contact Ascent Research.
