The ALDH18A1 Knockout A-549 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population designed to disrupt the ALDH18A1 gene in the human lung adenocarcinoma cell line A-549. This polyclonal pool provides a genetically heterogeneous loss-of-function model suitable for functional studies of ALDH18A1 in cancer metabolism and proline biosynthesis.
The A-549 cell line, derived from human lung carcinoma tissue, is an established epithelial model for lung adenocarcinoma and is widely employed in respiratory virus research and oncology studies. These adherent cells retain characteristic features of alveolar epithelial cells, making them a relevant system for investigating tumor biology and host?Cpathogen interactions.
ALDH18A1 encodes P5CS, a bifunctional mitochondrial enzyme that catalyzes the first two steps of de novo proline synthesis from glutamate, a pathway critical for collagen biosynthesis and cell proliferation. The enzyme is under transcriptional control by ATF4 and mTORC1 in response to glutamine availability and feeds downstream into proline, ornithine, and arginine metabolism via interacting partners such as PYCR1, PYCR2, and PYCRL. In the A-549 background, disruption of ALDH18A1 abolishes the primary route for intracellular proline production, leading to impaired collagen synthesis and potential activation of amino acid starvation responses that can attenuate tumor cell growth.
In lung adenocarcinoma, proline metabolism is often rewired to support rapid proliferation and extracellular matrix remodeling. The ALDH18A1 knockout model in A-549 cells serves as a powerful tool to dissect the contribution of proline biosynthesis to these processes. Loss of ALDH18A1 may compromise collagen secretion, alter metabolic flux through the proline cycle, and sensitize cells to nutrient stress, highlighting dependencies that could be exploited for therapeutic intervention.
This polyclonal knockout pool is suitable for a range of downstream assays, including western blotting for ALDH18A1, RT-qPCR analysis of proline metabolic genes, proline quantification, collagen staining, and cell proliferation assays. More advanced applications include metabolic flux analysis with isotopically labeled glutamine and three-dimensional spheroid formation assays to evaluate tumorigenic potential. Researchers studying metabolic reprogramming, amino acid deprivation responses, and drug targeting of proline metabolism will find this model valuable. For inquiries regarding this product or custom gene-editing services, please contact Ascent Research.
