About Human Sphingosine-1-Phosphate Receptor 3 (S1PR3/EDG3) Stable Cell Line

Sphingosine-1-Phosphate Receptor 3 (S1PR3), also known as Endothelial Differentiation Gene 3 (EDG3), is a Class A G protein-coupled receptor (GPCR) that binds the bioactive sphingolipid sphingosine-1-phosphate (S1P). S1PR3 belongs to the sphingosine-1-phosphate receptor family, which consists of five receptor subtypes (S1PR1–S1PR5) that regulate a broad range of physiological processes, including vascular development, immune cell trafficking, inflammation, and tissue repair. Upon activation by S1P, S1PR3 can couple to multiple G proteins, including Gi, Gq, and G12/13, enabling activation of diverse downstream signaling pathways that regulate calcium mobilization, cytoskeletal remodeling, cell migration, proliferation, survival, and inflammatory responses.

S1PR3 is widely expressed throughout the cardiovascular system, lungs, kidneys, liver, immune cells, and central nervous system. The receptor plays important roles in vascular tone regulation, endothelial barrier function, angiogenesis, cardiac physiology, and immune cell activation. S1PR3 signaling contributes to both physiological and pathological processes, including inflammation, fibrosis, atherosclerosis, hypertension, pulmonary disease, and cancer progression. Due to its broad involvement in cardiovascular, inflammatory, and immune pathways, S1PR3 has emerged as an important target for translational research and therapeutic development.

eEnzyme's Human S1PR3 Stable Cell Line provides a reliable and reproducible cellular platform for investigating S1PR3-mediated signaling pathways and evaluating receptor-targeted therapeutics. The cell line enables quantitative assessment of sphingosine-1-phosphate analogs, agonists, antagonists, and novel receptor modulators through calcium mobilization assays, reporter gene assays, cAMP assays, and other GPCR functional screening platforms. Researchers can utilize this stable cell line for receptor characterization, ligand profiling, potency determination, lead optimization, and high-throughput screening applications supporting cardiovascular, immunology, inflammation, and oncology research programs.

Applications of the S1PR3 Stable Cell Line

• S1PR3 receptor pharmacology studies
• Sphingosine-1-phosphate signaling investigations
• Agonist and antagonist screening
• Cardiovascular and vascular biology research
• Inflammation and immunology studies
• Fibrosis and tissue remodeling research
• Calcium mobilization and GPCR functional assays
• High-throughput screening applications

Biological Significance of S1PR3

S1PR3 is a key mediator of sphingolipid signaling and regulates numerous cellular processes involved in vascular function, immune responses, and tissue homeostasis. Activation of S1PR3 influences endothelial permeability, smooth muscle contraction, leukocyte recruitment, cytokine production, and angiogenic signaling. In the cardiovascular system, S1PR3 contributes to regulation of vascular tone, blood pressure, and cardiac remodeling. In immune cells, the receptor participates in inflammatory signaling pathways and immune cell migration. Aberrant S1PR3 activity has been linked to chronic inflammatory diseases, cardiovascular disorders, pulmonary fibrosis, cancer progression, and metabolic dysfunction. Because of its central role in coordinating vascular and immune responses, S1PR3 remains an important target in cardiovascular research, immunology, and GPCR-focused drug discovery. The S1PR3 Stable Cell Line provides a valuable tool for studying sphingosine-1-phosphate receptor biology and advancing the development of next-generation therapeutics targeting inflammatory, cardiovascular, fibrotic, and oncological diseases.