The ASAH1 Knockout A-549 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal cell population in which the ASAH1 gene has been disrupted. Derived from the human A-549 lung adenocarcinoma line, this product provides a heterogeneous pool of knockout cells without clonal selection, enabling bulk assays of ASAH1 function. The polyclonal format facilitates straightforward loss-of-function experiments while maintaining the adherent epithelial morphology of the parental cells.
A-549 cells originate from a 58-year-old male Caucasian with lung adenocarcinoma and display adherent epithelial morphology. They serve as a model of alveolar type II epithelium and are widely employed in cancer biology, respiratory research, and drug discovery. The line bears a KRAS G12S mutation and wild-type p53, offering a characterized genetic context for studying sphingolipid metabolism in malignancy.
Acid ceramidase (ASAH1) is a lysosomal enzyme that hydrolyzes ceramide into sphingosine and free fatty acid, a key step controlling the balance between pro-apoptotic ceramide and pro-survival sphingosine-1-phosphate (S1P). ASAH1 activity is regulated upstream by TNF??, IL-1??, oxidative stress, and lysosomal pH, and requires interaction with the ceramide substrate and saposin C. Downstream, sphingosine is phosphorylated by SPHK1 to produce S1P, which engages S1PR1 to activate AKT and ERK1/2 pathways. ASAH1 disruption therefore causes ceramide accumulation, reduced S1P, and suppression of survival signaling while sensitizing cells to apoptosis via caspase-9, cytochrome c, and PARP cleavage.
In A-549 cells, ASAH1 knockout allows dissection of ceramide-mediated apoptosis, autophagy, and lysosomal function in a lung adenocarcinoma background. This model is relevant for investigating Farber lipogranulomatosis pathology, as well as the roles of sphingolipid metabolism in cancer progression, drug resistance, and inflammation. Since A-549 cells are a standard platform for alveolar epithelial studies, the knockout enables exploration of how sphingolipid imbalance contributes to respiratory diseases and tumorigenesis.
These cells are suitable for applications in cancer biology, sphingolipid signaling, apoptosis regulation, and functional genomics. Researchers can perform ceramide mass spectrometry, S1P ELISA, Western blotting for ASAH1 and apoptotic markers, acid ceramidase activity assays, and LAMP1 immunofluorescence. Complementary assays such as cell viability, migration/invasion, and flow cytometry for cell cycle provide comprehensive phenotypic analysis. For further information, please contact Ascent Research.
