Đoàn Lan Phương1, Trịnh Thị Thu Hương1, Valentin A. Stonik
1 Viện Hóa học các hợp chất thiên nhiên, Viện Hàn lâm Khoa học và Công nghệ Việt Nam
2Trường Đại học Sư phạm 2, Xuân Hòa, Phúc Yên, Vĩnh Phúc
3Viện Hóa sinh hữu cơ Thái Bình Dương E.G. Elyakov, Phân viện Viễn Đông - Viện Hàn lâm khoa học LB Nga, Pr. 100 let Vladivostoku 159, Vladivostok, 690022, LB Nga
Two starfish Acanthaster planci and Echinaster luzonicus collected from Van Phong bay, Khanh Hoa, Viet nam were investigated for steroid glycosides constituents and their bioactivities. Four new steroid glycosides, plancisides A-D (1-4), were isolated from the ethanolic extract of the starfish Acanthaster planci. Planciside B (2) and planciside D (4) are the first steroid glycosides containing an α-fucopyranose unit found from starfish. Planciside A (1) slightly inhibits cell proliferation of HCT-116, T-47D, and RPMI-7951 cancer cell lines, but has no effect on colony formation of these cells in a soft agar clonogenic assay. Five new steroid glycosides, luzonicosides B−E (6−9), belonging to a rare structure group of marine glycosides, containing carbohydrate moieties incorporated into a macrocycle, and a related open carbohydrate chain steroid glycoside, luzonicoside F (10), were isolated from the starfish Echinaster luzonicus along with the previously known cyclic steroid glycoside luzonicoside A (5). Luzonicoside A (5) was shown to be potent in lysosomal activity stimulation, intracellular ROS level elevation, and NO synthesis up-regulation in RAW 264.7 murine macrophages at concentrations of 0.01−0.1 μM. Luzonicoside D (6) was less active in these biotests.
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