α-Glucosidase Inhibitory Activity of Resin From Sakhalin fir Tree ( Abies sachalinensis ) and its Bioactive Compounds

• Published in: Natural Product Communications
• Main Authors: Nakagawa, Toshinori, Ashour, Ahmed, Amen, Yhiya, Koba, Yurie, Ohnuki, Koichiro, Shimizu, Kuniyoshi
• Format: Article in Journal/Newspaper
• Language: English
• Published: SAGE Publications 2019
• Subjects: Complementary and alternative medicine; Plant Science; Drug Discovery; Pharmacology; General Medicine; Sakhalin
• Online Access: http://dx.doi.org/10.1177/1934578x19858460; http://journals.sagepub.com/doi/pdf/10.1177/1934578X19858460; http://journals.sagepub.com/doi/full-xml/10.1177/1934578X19858460

This study investigated in vitro the α-glucosidase inhibitory activity of resin from the Sakhalin fir tree ( Abies sachalinensis). The resin showed extremely high activity (IC 50 of 17.3 µg/mL). We isolated 8 compounds from the resin and identified them. All of the compounds isolated from A. sachalinensis resin are reported for the first time in the present study. In an α-glucosidase inhibitory assay, 6 compounds—(holophyllane C (1), (−) -(24 E)-23-oxo-3,4- seco-9β H-lanosta-4(28),6,8(14),24-tetraen-3,26-dioic acid (2), abiesonic acid (3), (−) -(24 E)-23-oxo-3,4- seco-9β H-lanosta-4(28),7,24-triene-3,26-dioic acid (4), 3,4- seco-4(28),6,8(14),22Z,24-mariesapentaen-26,23-olide-3-oic acid (5), and (−) -abiesonic acid 3-methyl ester (6))—showed high activity (their IC 50 values were 25.1, 20.9, 82.4, 20.5, 27.3, and 20.5 µg/mL, respectively). These compounds should contribute to the resin’s α-glucosidase inhibitory activity. From an industrial point of view, these findings provide new data to support that the resin of A. sachalinensis is a rich source of α-glucosidase inhibitors, which are highly valuable for their potential to be developed as functional health foods.