Hydrophobic substituents increase the potency of salacinol, a potent α-glucosidase inhibitor from Ayurvedic traditional medicine ‘Salacia’
作者:Genzoh Tanabe、Weijia Xie、Gorre Balakishan、Mumen F.A. Amer、Nozomi Tsutsui、Haruka Takemura、Shinya Nakamura、Junji Akaki、Kiyofumi Ninomiya、Toshio Morikawa、Isao Nakanishi、Osamu Muraoka
DOI:10.1016/j.bmc.2016.06.013
日期:2016.8
Using an in silico method, seven analogs bearing hydrophobic substituents (8a: Me, 8b: Et, 8c: n-Pent, 8d: n-Hept, 8e: n-Tridec, 8f: isoBu and 8g: neoPent) at the 3'-O-position in salacinol (1), a highly potent natural alpha-glucosidase inhibitor from Ayurvedic traditional medicine 'Salacia', were designed and synthesized. In order to verify the computational SAR assessments, their alpha-glucosidase inhibitory activities were evaluated in vitro. All analogs (8a-8g) exhibited an equal or considerably higher level of inhibitory activity against rat small intestinal alpha-glucosidases compared with the original sulfonate (1), and were as potent as or higher in potency than the clinically used anti-diabetics, voglibose, acarbose or miglitol. Their activities against human maltase exhibited good relationships to the results obtained with enzymes of rat origin. Among the designed compounds, the one with a 3'-O-neopentyl moiety (8g) was most potent, with an approximately ten fold increase in activity against human maltase compared to 1. (C) 2016 Elsevier Ltd. All rights reserved.