3-(3-Hydroxyphenyl)propionic Acid

3-(3-Hydroxyphenyl)propionic Acid (CAS No.: 621-54-5) is a microbiota-derived phenolic metabolite of dietary polyphenols that serves as a biologically active small molecule in cardiovascular and metabolic research. It functions primarily as an endothelium-dependent nitric oxide release promoter and activator of endothelial nitric oxide synthase, thereby enhancing nitric oxide bioavailability, promoting vascular smooth muscle relaxation, and reducing peripheral vascular resistance through modulation of endothelial signaling pathways. In vitro studies indicate that this compound influences vascular smooth muscle cell behavior and cellular proliferation, while exhibiting activity across nanomolar to micromolar concentration ranges in assays related to oxidative stress, membrane integrity, and enzyme regulation. In addition to its vasodilatory and antihypertensive effects observed in preclinical models, it demonstrates broader bioactivity including inhibition of amyloid-β peptide aggregation, attenuation of osteoclast-mediated bone resorption, and protection against oxidative damage in cellular systems, suggesting involvement in redox-sensitive and inflammatory pathways. As a gut microbiota-derived metabolite that can distribute systemically and accumulate in target tissues such as the brain, it is widely utilized in cell-based assays and animal models to investigate mechanisms underlying cardiovascular dysfunction, neurodegeneration, and metabolic regulation, with experimental concentrations or dosing regimens varying according to specific study designs and therapeutic hypotheses.