FADS3 Inhibitors encompass a diverse range of compounds that can indirectly inhibit the activity of this enzyme, primarily by affecting the availability of its substrates or by altering cellular pathways that regulate its function. Epigallocatechin gallate, for instance, competes with natural substrates of FADS3, leading to inhibition of its desaturase activity, while LY294002 disrupts lipid signaling pathways that are potentially crucial for FADS3 functionality. Other compounds, such as PD98059, target phosphorylation events, which are important for the regulation of FADS3 activity, and thus can indirectly lead to its inhibition.
Compounds like Simvastatin and Cerulenin act upstream by inhibiting enzymes involved in cholesterol and fatty acid biosynthesis, respectively, resulting in a decreased pool of lipids that could serve as substrates for FADS3. GW6471and Triacsin C exert their inhibitory effects by antagonizing PPARα and inhibiting long-chain acyl-CoA synthetase, both of which are important for the regulation of fatty acid metabolism and, consequently, for the functionality of FADS3. Inhibitors like Soraphen A and C75 reduce the biosynthesis and transport of fatty acids, thereby indirectly diminishing FADS3 activity due to substrate scarcity. Tunicamycin's inhibition of glycosylation processes can also affect FADS3 by potentially disrupting its stability and localization. Finally, Perhexiline can cause the build-up of long-chain fatty acids, which could lead to the inhibition of FADS3 through product inhibition or by altering the balance of fatty acid metabolism, indicating a complex interplay between fatty acid synthesis, utilization, and desaturation where FADS3 plays a critical role.