Dihomo-γ-Linolenic Acid

Dihomo-γ-Linolenic Acid (CAS No.: 1783-84-2) is a naturally occurring ω-6 polyunsaturated fatty acid that functions as a key metabolic intermediate in lipid signaling pathways and is derived from the elongation of γ-linolenic acid. Structurally characterized by a 20-carbon backbone with multiple unsaturations, it is closely related to arachidonic acid but differs in its desaturation pattern, which underlies its distinct biological activities. Dihomo-γ-linolenic acid is primarily involved in eicosanoid biosynthesis, serving as a substrate for cyclooxygenase enzymes to generate 1-series prostaglandins such as prostaglandin E1, which are generally associated with anti-inflammatory and vasoregulatory effects. It can also be further desaturated by fatty acid desaturases to form arachidonic acid, thereby linking anti-inflammatory and pro-inflammatory lipid mediator pathways. Functionally, DGLA has been reported to exhibit anti-inflammatory and anti-proliferative activities, modulating cellular responses through lipid signaling networks and influencing processes such as immune regulation, cell growth, and vascular homeostasis. In experimental systems, it has demonstrated efficacy in attenuating atherosclerosis and inflammatory skin conditions in animal models, highlighting its relevance in cardiovascular and inflammatory disease research. In vitro studies typically employ concentrations in the micromolar range, although effective dosing varies depending on cell type and experimental design. Dihomo-γ-linolenic acid is widely utilized in studies of lipid metabolism, prostaglandin signaling, and drug discovery efforts targeting inflammatory and metabolic disorders.