ASIC1 Knockout A-549 Polyclonal Cells represent a CRISPR/Cas9-edited polyclonal population of A-549 cells with targeted disruption of the ASIC1 gene. This knockout model provides a reproducible loss-of-function system for investigating ASIC1-mediated proton-sensing and sodium signaling in a well-characterized human epithelial cell background. The polyclonal nature ensures a diverse representation of editing events, enabling robust functional studies without the limitations of single-cell clonal expansion.
The A-549 cell line is derived from a human lung adenocarcinoma of a 58-year-old Caucasian male and exhibits adherent epithelial morphology. These cells are widely utilized in respiratory research, cancer biology, and drug metabolism studies due to their alveolar basal epithelial origin. Their robust growth characteristics and ease of transfection make them an ideal host for CRISPR/Cas9 gene editing, and they provide a consistent platform for examining the roles of target genes in lung epithelial pathophysiology and beyond.
ASIC1 encodes a proton-gated sodium channel that opens in response to extracellular acidosis, leading to Na+ influx and membrane depolarization. This channel is a key mediator of acid-sensing signaling, implicated in synaptic plasticity, learning, fear conditioning, and pain sensation. ASIC1 activity is modulated by extracellular protons and inflammatory mediators such as bradykinin and prostaglandins, and it can be inhibited by antagonists like PcTx1 and amiloride. Upon activation, ASIC1 triggers neuronal depolarization, promotes calcium influx via voltage-gated calcium channels, and stimulates downstream cascades including the MAPK/ERK pathway and neurotransmitter release (e.g., glutamate). ASIC1 physically interacts with accessory subunits ASIC2 and ASIC3, as well as with regulatory proteins PICK1, CaMKII, and syntaxin 1A, which fine-tune its trafficking and function. These interactions couple proton sensing to rapid cellular responses and gene expression changes, including CREB phosphorylation.
While ASIC1 is predominantly studied in neuronal systems, its expression in non-neuronal tissues and cancer cells is increasingly recognized. The A-549 epithelial background offers a unique, adherent cell model for dissecting ASIC1-dependent signaling without the complexity of neuronal cultures. This model enables the examination of acid-induced responses in a lung cancer environment, potentially relevant to tumor acidosis, inflammation, and drug resistance. The polyclonal knockout cells circumvent clonal variability and provide a more representative loss-of-function system for high-throughput screening and mechanistic studies.
This knockout product is suitable for a broad range of applications, including acid-sensing research, pain mechanism studies, ischemic stroke modeling, and drug screening for ASIC1 inhibitors. Researchers can employ pH-drop-induced calcium imaging, patch-clamp electrophysiology, acid-induced cell death assays, western blotting, immunofluorescence staining, and ratiometric intracellular pH measurements. These tools facilitate the investigation of ASIC1-mediated signaling in both normal and pathological states. For more details or to discuss custom applications, please contact Ascent Research.
