The HSPB7 Knockout HEK293T Polyclonal Cells are a CRISPR/Cas9-edited polyclonal cell population with targeted disruption of the HSPB7 gene, establishing a loss-of-function model for investigating HSPB7-dependent biology. This knockout tool enables dissection of the cardioprotective and chaperone functions of HSPB7 in a tractable cellular system, offering a genetically defined background for stress response and signaling studies without clonal selection constraints.
These cells are derived from the HEK293T cell line, a human embryonic kidney derivative that stably expresses SV40 large T antigen, promoting high-level protein expression and efficient lentiviral packaging. HEK293T cells?? robust growth, ease of transfection, and broad signaling competence make them an optimal host for studying gene function via CRISPR-based knockout, even for genes predominantly expressed in cardiac muscle.
HSPB7 is a small heat shock protein with ATP-independent chaperone activity that stabilizes sarcomeric actin filaments and protects cells from mechanical and oxidative stress. It operates within a network involving interactions with HSPB1, BAG3, actin, and 14-3-3 proteins. Upstream, HSPB7 is transcriptionally regulated by HSF1, GATA4, and MEF2, and is activated by stress signals such as Angiotensin II, Endothelin-1, and mechanical load. Functionally, it modulates p38 MAPK and ERK1/2 phosphorylation pathways, linking extracellular stimuli to cytoskeletal integrity and cardiomyocyte hypertrophy signaling. Knockout eliminates these activities, providing a clean slate for analyzing stress kinase cascades and chaperone-assisted actin remodeling.
In the HEK293T context, HSPB7 disruption removes its actin-stabilizing function and alters cellular responses to heat shock and oxidative insults, making these cells a practical model for exploring conserved cardioprotective mechanisms. They allow unbiased mapping of HSPB7 interactomes via co-immunoprecipitation and mass spectrometry, and enable interrogation of whether HSPB7??s roles in MAPK modulation are cell-type independent. The polyclonal nature avoids clonal artifacts and ensures representative population-level phenotypes.
Applications range from phospho-specific flow cytometry to quantify p38 MAPK and ERK1/2 activation kinetics, to high-content screening for cytoprotective small molecules. The cells are suitable for immunofluorescence microscopy of the actin cytoskeleton, co-immunoprecipitation of BAG3 and 14-3-3 complexes, and RT-qPCR profiling of stress-responsive transcription factors. For further information, please contact Ascent Research.
