The ARHGDIA Knockout Jurkat Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population derived from the human Jurkat T lymphoblast cell line. This product carries a targeted disruption of the ARHGDIA gene, creating a loss-of-function model for studying Rho GTPase signaling. The polyclonal format provides a genetically heterogeneous pool of knockout cells, ideal for investigating ARHGDIA function in a T cell context. The cell population is suitable for a range of functional assays, including signaling analysis, migration, adhesion, and cytoskeletal studies.
The Jurkat cell line is an immortalized T lymphoblast line established from a patient with acute T cell leukemia. Jurkat cells are a well-characterized model for T cell receptor signaling, activation, and leukemia biology. They express key T cell signaling molecules, making them ideal for studying ARHGDIA in immune-related signaling pathways. The leukemic origin of Jurkat cells provides a relevant background for exploring the gene??s role in cancer cell behavior.
ARHGDIA encodes Rho GDP-dissociation inhibitor alpha, a major negative regulator of Rho family GTPases, including RhoA, Rac1, and Cdc42. It maintains these GTPases in an inactive GDP-bound state by inhibiting nucleotide exchange and membrane association. ARHGDIA directly interacts with RhoA, Rac1, Cdc42, and ERM proteins (ezrin, radixin, moesin). Upstream regulators include Src family kinases (Lck, Fyn), PAK1, and caspase-3. Disruption of ARHGDIA releases this inhibition, leading to constitutive activation of Rho GTPases and downstream pathways: RhoA?CROCK?CLIMK?Ccofilin-mediated actin remodeling, Rac1?CWAVE?CArp2/3-driven lamellipodia, and Cdc42?CN-WASP-induced filopodia. Additionally, GTPase activation influences transcription factors like NF-??B and SRF, and kinases such as JNK, integrating signals for proliferation, adhesion, and migration.
In Jurkat T cells, ARHGDIA knockout profoundly alters cytoskeletal dynamics and cell adhesion, which are critical for T cell migration and immune synapse formation. The constitutive activation of Rho GTPases may enhance migratory and invasive properties, reflecting potential roles in leukemia dissemination. This model allows dissection of ARHGDIA??s function in T cell receptor signaling and its cross-talk with integrin-mediated adhesion. By releasing Rho GTPase inhibition, the knockout cells provide a platform to examine how aberrant GTPase activity contributes to leukemogenesis and immune cell dysfunction.
Researchers can employ this polyclonal knockout population for various experimental approaches. Western blotting confirms ARHGDIA loss and phospho-MLC levels. Rho GTPase activity assays (G-LISA) measure activation. Functional studies include Transwell migration and invasion assays, cell adhesion assays, and immunofluorescence for F-actin. Flow cytometry can profile T cell activation markers, while phospho-signaling analysis detects changes in phospho-cofilin and phospho-PAK. These cells are also valuable for screening Rho pathway inhibitors and studying immune synapse formation. For further information, contact Ascent Research.
