The ANO8 Knockout HEK293T Polyclonal Cells are a CRISPR/Cas9-edited polyclonal population with constitutive disruption of the ANO8 gene (TMEM16H). This heterogeneous pool of cells harbors diverse loss-of-function allelic modifications, eliminating ANO8 expression without clonal selection artifacts. The polyclonal format is particularly suited for studying population-level phenotypes and functional redundancy. By collectively abrogating ANO8, this model provides a robust loss-of-function system for target validation and mechanistic studies.
HEK293T cells are human embryonic kidney epithelial derivatives transformed with adenovirus E1A and SV40 large T antigen, enabling high-level protein expression and episomal plasmid replication. Widely employed for signaling studies, they endogenously express multiple anoctamin family members, providing a relevant background for analyzing calcium-dependent scramblase and ion channel functions. Their rapid growth, transfectability, and well-characterized molecular landscape make HEK293T a robust platform for membrane biology and intracellular pathway investigation.
ANO8 encodes a calcium-activated phospholipid scramblase and putative chloride channel that facilitates bidirectional movement of phospholipids and chloride ions across the plasma membrane. Activity is triggered by intracellular calcium elevation, typically downstream of GPCR and phospholipase C (PLC) activation. Upon calcium binding, ANO8 drives phosphatidylserine externalization and chloride efflux, thereby modulating membrane potential and surface receptor dynamics. ANO8 engages in interactions with other anoctamin proteins, lipid membrane components, and calcium-binding proteins, positioning it at the intersection of calcium signaling, phospholipid asymmetry, and ion homeostasis. This signaling node regulates processes including apoptosis, cell fusion, and membrane remodeling.
Disrupting ANO8 in HEK293T cells creates a tractable model to dissect the specific contributions of this scramblase/ion channel. Though ANO8 expression in HEK293T is not fully characterized, this knockout population enables parsing of functional interactions among anoctamin family members. Experiments can assess changes in phosphatidylserine flipping, chloride currents, and viability upon calcium mobilization. The model is valuable for exploring the ambiguous roles of ANO8 in cancer, where phospholipid asymmetry influences immune surveillance, and in neurological conditions linked to ion dysregulation. The polyclonal configuration reduces clonal bias and provides independent mutations for phenotype validation.
Applications include monitoring phosphatidylserine exposure with annexin V staining, patch-clamp electrophysiology for chloride conductance, and calcium imaging using Fura-2 or Fluo-4 to delineate signaling kinetics. High-throughput viability assays support screening for modulators of ANO8-related pathways. The system is ideally suited for investigating lipid scramblase mechanisms, ion channel pharmacology, and the molecular basis of membrane asymmetry. For further technical information, please contact Ascent Research.
