ASIC1 Knockout HAP1 Polyclonal Cells represent a CRISPR/Cas9-mediated gene-disrupted pool of HAP1 cells, generated to eliminate functional ASIC1 protein expression. This polyclonal knockout population provides a heterogeneous loss-of-function model for acid-sensing ion channel 1, enabling robust studies without the need for single-cell clonal isolation. The polyclonal format ensures genetic diversity while maintaining consistent target gene disruption across the culture, suitable for high-throughput screening and bulk biochemical assays.
The HAP1 cell line is a near-haploid human male chronic myeloid leukemia (CML)-derived hematopoietic cell model. Its haploid chromosomal complement in a majority of cells facilitates straightforward CRISPR-based knockout generation and reduces functional redundancy from diploid gene copies. HAP1 cells exhibit adherent, fibroblast-like morphology and have been widely employed as a workhorse cell line for studying gene function in proliferation, signaling, and drug response, particularly in a physiologically relevant leukemic background. While not of neuronal origin, HAP1 cells express many signaling intermediates shared with neural tissues, permitting analysis of ion channel signaling in a simplified genetic environment.
ASIC1 encodes a proton-gated sodium channel that opens in response to extracellular acidification, mediating rapid Na+ influx and subsequent membrane depolarization. This triggers action potentials in excitable cells and facilitates secondary calcium entry, activating downstream effectors such as CaMKII and CREB. ASIC1 function is modulated by upstream regulators including tissue acidosis, extracellular protons, bradykinin, serotonin, PKA, and PKC. The channel interacts with scaffold and regulatory proteins such as PICK1, STOM, annexin II, and forms heteromeric complexes with ASIC2 and ASIC3, which are processed by furin. Signaling cascades downstream of ASIC1 involve calcium-dependent pathways that influence neuronal excitability, synaptic plasticity, and pain perception.
In the HAP1 host, ASIC1 knockout provides a unique platform to dissect the channel??s non-neuronal functions, particularly in pH-sensing mechanisms relevant to the hematopoietic and leukemic context. ASIC1 has been implicated in cancer cell migration and invasiveness, notably in glioblastoma, and its expression in leukemic cells may contribute to microenvironmental pH sensing and adaptation. The near-haploid background of HAP1 ensures efficient gene disruption and minimizes off-target compensation, enabling clean interpretation of ASIC1-dependent phenotypes. This model is thus valuable for studying acidosis-related signal transduction, ion channel pharmacology, and the interplay between pH sensation and cellular behavior in a cancer-relevant hematopoietic lineage.
Researchers can employ this polyclonal knockout model in a variety of assays tailored to acid-sensing research. Patch-clamp electrophysiology and pH-dependent current recordings directly measure altered sodium channel activity. Calcium imaging reveals changes in secondary Ca2+ responses. Western blotting and immunofluorescence confirm loss of ASIC1 expression and assess signaling effectors like phosphorylated CaMKII or CREB. Cell migration assays and MTT proliferation assays evaluate contributions of ASIC1 to motility and viability under acidic stress. This knockout cell pool is ideally suited for ion channel drug screening and pharmacological studies targeting acid-sensing pathways. For further technical details or bulk-order inquiries, please contact Ascent Research.
