Shimoda H.,Oryza Oil and Fat Chemical Co. Aichi |
Nakamura S.,Kyoto Pharmaceutical University |
Morioka M.,Kyoto Pharmaceutical University |
Tanaka J.,Oryza Oil and Fat Chemical Co. Aichi |
And 2 more authors.
Phytotherapy Research | Year: 2011
Cherry blossom flowers are familiar to the Japanese, and some species of the flowers soaked in salty vinegar are used as processed foods. The constituents of aqueous ethanol extract from cherry blossom (Prunus lannesiana) flowers (CBE) were examined and cinnamoyl and flavonol glucosides were isolated. To elucidate the pharmacological functions of CBE and its constituents, their effects on the production of advanced glycation end products (AGEs) and on AGE-induced fibroblast damage were examined. CBE and 1-O-(E)-caffeoyl-β-d- glucopyranoside (CaG), a principal compound in CBE, significantly suppressed the production of AGEs derived from glucose and albumin at 100μg/mL. Among the flavonol glucosides, quercetin 3-O-β-d-glucopyranoside (QG) exhibited potent suppressive activity (IC 50: 30μg/mL). CBE and CaG suppressed glyoxal-induced AGE production in fibroblasts at 10μg/mL, but QG did not. In addition, CBE and CaG recovered collagen lattice formation consisting of collagen and glycated fibroblasts at 10μg/mL. Moreover, CBE and its constituents, except kaempferol 3-O-(6″-malony)-β-d- glucopyranoside, significantly suppressed fibroblast apoptosis induced by carboxymethyl lysine-collagen at 10μg/mL. These results show that cinnamoyl and flavonol glucosides of cherry blossom flowers suppress AGE production and AGE-induced fibroblast apoptosis. Cherry blossom flowers may be effective against skin AGE production and fibroblast damage by AGEs. Copyright © 2011 John Wiley & Sons, Ltd.