title: Enzyme inhibitors: new and known polybrominated phenols and diphenyl ethers from four Indo-Pacific Dysidea sponges.
abstract: Extracts and pure compounds isolated from four samples of Dysidea sp. sponges collected from two geographically distinct regions of the Indo-Pacific (Chuuk Atoll and Fiji) were assayed against five different enzyme assays, four of which are relevant to anticancer drug discovery and one of which (15-lipoxygenase) may detect compounds significant in modulating the development of atherosclerotic plaque. The pure compounds that inhibited various enzymes were polybrominated phenols and polybrominated phenoxyphenols. Fourteen of these phenols were isolated, six of which were new compounds. A variety of the phenols inhibited inosine monophosphate dehydrogenase (IMPDH), guanosine monophosphate synthetase, and 15-lipoxygenase. No activity was observed with protein tyrosine kinase pp60v-src or matrix metalloprotease.
mesh_terms: D000818:Animals; D001688:Biological Products / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology; D019731:Carbon-Nitrogen Ligases; D004791:Enzyme Inhibitors / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D007168:IMP Dehydrogenase / Q000037:antagonists & inhibitors; D008025:Ligases / Q000037:antagonists & inhibitors; D016859:Lipoxygenase Inhibitors; D015394:Molecular Structure; D010636:Phenols / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D010647:Phenyl Ethers / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D011161:Porifera / Q000737:chemistry*; D011505:Protein-Tyrosine Kinases / Q000037:antagonists & inhibitors
chemical_list: D001688:Biological Products; D004791:Enzyme Inhibitors; D016859:Lipoxygenase Inhibitors; D010636:Phenols; D010647:Phenyl Ethers; D007168:IMP Dehydrogenase; D011505:Protein-Tyrosine Kinases; D008025:Ligases; D019731:Carbon-Nitrogen Ligases; C020828:GMP synthase (glutamine-hydrolyzing)