The affinity to the brain dopamine D1 receptor in vitro of triprenyl phenols isolated from the fruit bodies of Albatrellus ovinus
作者:K Dekermendjian、R Shan、M Nielsen、M Stadler、O Sterner、M.R. Witt
DOI:10.1016/s0223-5234(97)89088-5
日期:1997.1
Six triprenyl phenols that inhibit the in vitro binding of H-3-SCH 23390 to the dopamine D-1 receptor subfamily in rat striatal brain membranes were isolated from extracts of the edible mushroom Albatrellus ovinus. The compounds, of which scutigeral 1a, ilicicolin B 3, neogrifolin 5a and grifolin 6 are known while ovinal 2 and ovinol 4a are new, were isolated by chromatography and their structures were determined by spectroscopic techniques The IC50 values of the most potent compound, scutigeral 2a, is 2.6 mu M and it was shown that it decreases the binding affinity of H-3-SCH 23390 in a competitive manner. Compounds 1-5 showed no inhibition on the binding of H-3-spiperone to the dopamine D-2 receptor subfamily, indicating that these compounds interact selectively with the dopamine D-1 receptor subfamily.