trans-Vaccenic Acid

trans-Vaccenic Acid (CAS No.: 693-72-1) is a naturally occurring ω-7 monounsaturated trans fatty acid predominantly found in ruminant-derived lipids, where it arises from microbial biohydrogenation processes in the rumen and can serve as a key metabolic intermediate. In mammalian systems, it functions as an endogenous precursor to conjugated linoleic acid (CLA) through desaturation pathways, linking it to diverse aspects of lipid metabolism and metabolic regulation. Biochemically, trans-Vaccenic acid has been shown to modulate signaling pathways associated with cell survival and apoptosis, including inhibition of Bad/Akt phosphorylation, thereby suppressing proliferation and promoting apoptotic responses in certain cancer cell models such as nasopharyngeal carcinoma. In metabolic disease research, it exhibits hypolipidemic and anti-steatotic effects in vivo, reducing adiposity, triglyceride secretion, and hepatic lipid accumulation in rodent models of obesity and metabolic syndrome, while also attenuating markers of non-alcoholic fatty liver disease and atherosclerosis. These activities suggest involvement in lipid homeostasis, energy balance, and inflammatory signaling networks. In vitro studies typically employ concentrations in the micromolar range to investigate its effects on lipid metabolism, cell signaling, and apoptosis, whereas in vivo applications rely on dietary supplementation paradigms tailored to specific experimental designs. As such, trans-Vaccenic acid is widely utilized in biomedical research to study fatty acid metabolism, lipid-related disorders, and the mechanistic interplay between dietary lipids and cellular signaling pathways.