Lignans from stems and leaves of Cephalotaxus fortunei (Ⅱ) / 中国中药杂志

The present study aimed to explore the chemical constituents from the stems and leaves of Cephalotaxus fortunei. Seven lignans were isolated from the 75% ethanol extract of C. fortunei by various chromatographic methods, including silica gel, ODS column chromatography, and HPLC. The structures of the isolated compounds were elucidated according to physicochemical properties and spectral data. Compound 1 is a new lignan named cephalignan A. The known compounds were identified as 8-hydroxy-conidendrine(2), isolariciresinol(3), leptolepisol D(4), diarctigenin(5), dihydrodehydrodiconiferyl alcohol 9'-O-β-D-glucopyranoside(6), and dihydrodehydrodiconiferyl alcohol 4-O-β-D-glucopyranoside(7). Compounds 2 and 5 were isolated from the Cephalotaxus plant for the first time.

Lignans from stems and leaves of Cephalotaxus fortunei / 中草药

Objective: To study chemical constituents of Cephalotaxus fortunei. Methods: The chemical constituents were separated and purified by preparative thin-layer chromatography, silica gel, ODS, HP20 macroporous resin and Sephadex LH-20 gel column chromatography, and semi-preparative HPLC. Their structures were determined by NMR and ESI-MS spectroscopic techniques. Results: Seventeen lignans were isolated from the ethanol extracts of C. fortunei and their structures were identified as shonanin (1), arctigenin (2), α-conidendrin (3), matairesinol (4), nortrachelogenin (5), epinortrachelogenin (6), (7'S)- hydroxymatairesinol (7), (7'R)-hydroxymatairesanol (8), (7'S)-hydroxyarctigenin (9), secoisolariciresinol (10), 4,4'-di-O-methylcephafortin A (11), 5-(3″,4″-dimethoxyphenyl)-3-hydroxy-3-(4'-hydroxy-3'-methoxybenzyl)-4-hydroxymethyl-dihydrofuran-2-one (12), cephafortin B (13), dihydrodehydrodiconiferyl alcohol (14), 7R,8S-4,7,9,9'-tetrahydroxy-3,3'-dimethoxy-8-O-4'-neolignan (15), 7R,8R-4,7,9,9'- tetrahydroxy-3,3'-dimethoxy-8-O-4'-neolignan (16), and threo-1,2-bis-(4-hydroxy-3-methoxyphenyl)-1,3-propanediol (17). Conclusion: Compounds 3, 6, 10 and 17 were isolated from genus Cephalotaxus for the first time, and compounds 4, 5, 7-9, 12 and 14 were isolated from C. fortunei for the first time.

Effect of Mac-1 deficiency on the tumor growth of melanoma in mice / 中国比较医学杂志

Objective To explore the influence of Mac-1 deficiency on tumor growth of melanoma. Methods The population of Mac-1 gene knock-out ( Mac-1 -/ -) mice was expanded. B16-F10 cells were subcutaneously injected into the C57BL/6J mice (control group) and Mac-1 -/ -mice (experiment group), respectively. Subsequently,the survival rate, tumor volume and body weight were recorded. The proliferation and infiltration of macrophages were detected by immunohistochemistry. Results The survival rate of Mac-1 -/ - mice was significantly improved compared with the C57BL/6J mice (P ﹤0. 001). The tumor volume and body weight were remarkably decreased in the Mac-1 -/ - mice compared with the control group (P﹤0. 001). Meanwhile, the tumor cell proliferation index was decreased in the Mac-1 -/ - mice compared with the control group (P﹤0. 01). Furthermore, the infiltration of macrophages in the tumor tissues was also decreased in Mac-1 -/ - tumor mice compared with control group. Conclusions Mac-1 gene deletion can significantly suppress melanoma growth.

Effect of Mac-1 deficiency on the tumor growth of melanoma in mice / 中国比较医学杂志

Objective To explore the influence of Mac-1 deficiency on tumor growth of melanoma. Methods The population of Mac-1 gene knock-out ( Mac-1 -/ -) mice was expanded. B16-F10 cells were subcutaneously injected into the C57BL/6J mice (control group) and Mac-1 -/ -mice (experiment group), respectively. Subsequently,the survival rate, tumor volume and body weight were recorded. The proliferation and infiltration of macrophages were detected by immunohistochemistry. Results The survival rate of Mac-1 -/ - mice was significantly improved compared with the C57BL/6J mice (P ﹤0. 001). The tumor volume and body weight were remarkably decreased in the Mac-1 -/ - mice compared with the control group (P﹤0. 001). Meanwhile, the tumor cell proliferation index was decreased in the Mac-1 -/ - mice compared with the control group (P﹤0. 01). Furthermore, the infiltration of macrophages in the tumor tissues was also decreased in Mac-1 -/ - tumor mice compared with control group. Conclusions Mac-1 gene deletion can significantly suppress melanoma growth.