Chemical constituents from Bidens bipinnata / 中国中药杂志

To investigate the chemical constituents of the whole plants of Bidens bipinnata, the separation and purification of constituents were performed by chromatography on macroporous resin, silica gel, MCI and Sephadex LH-20. Their structures were elucidated by spectroscopic data as quercetin (1), quercetin-3-0-alpha-L-rhamnoside (2), keampferol-3-O-beta-D-glucopyranoside (3), keampferol-3-O-alpha-L-rhamnoside (4), 3', 5-dyhydroxy-3, 6, 4'-trimethoxyl -7-O-beta-D-glucopyranoside flavonoid (5), 7, 8, 3', 4'-tetraflavanone(6), (2S)- and (2R)-isookanin-7-O-beta-D- glucopyranoside (7a/7b), (2S)- and (2R)-3'-methoxy-isookanin-8-O-beta-D-glucopyranoside (8a/8b), 6, 7, 3', 4'-tetrahydroxyaurone(9), maritimetin (10), esculetin (11), 3-O-caffeoyl-2-methyl-d-erythrono-1, 4-lactone (12), (7S, 8R) balanophonin-4-O-beta-D-glucopyranoside (13), eugenyl-O-beta-apiofuranosyl-( 1"-6') -O-beta-glucopyranoside (14), and (+)-syringaresinol-4'-O-beta-D-glucopyranoside (15). Compounds 8, 13, 14, and 15 were isolated from this genus for the first time. Compounds 1 and 6 were potent inhibitors against HSC-T6 cells in vitro and compounds 1, 2, 6, and 7 were capable of decreasing the inflammatory cytokine production of macrophage cells in vitro.

Antiinflammatory and immunoregulatory effects of total glucosides of Yupingfeng powder / 中华医学杂志(英文版)

<p><b>BACKGROUND</b>Yupingfeng, a traditional Chinese complex prescription, has been used efficaciously in China for the cure and prevention of inflammatory diseases related to immunodeficiency such as allergic rhinitis and chronic bronchitis. However, the active components of this prescription remain unclear. The present study focused on investigating the antiinflammatory and immunoregulatory effects of the glucosidic extract from Yupingfeng.</p><p><b>METHODS</b>We tested animal models for ear swelling induced by dimethylbenzene in mice; palm swelling induced by carregeenin and granuloma induced by cotton pellet in rats; level of haemolysin, antibody generation by the splenic cells, delayed hypersensitivity and T cell subsets in spleen of immunosuppressed mice.</p><p><b>RESULTS</b>Glucosidic extract of 24 mg/kg, 48 mg/kg and 96 mg/kg significantly inhibited mice's ear swelling induced by dimethylbenzene. Similarly glucosidic extract of 16 mg/kg, 32 mg/kg and 64 mg/kg inhibited rats' palm swelling induced by carregeenin and granuloma induced by cotton pellet. Glucosidic extract of 24 mg/kg, 48 mg/kg and 96 mg/kg improved the IgM level in serum and level of haemolysin in splenocytes in mice immunosuppressed by cyclophosphamide. Delayed hypersensitivity in mice suppressed by cyclophosphamide was enhanced by glucosidic extract of 24 mg/kg, 48 mg/kg and 96 mg/kg. These results suggested that Yupingfeng could recover humoral and cellular immune function in mice with immunosuppression. Glucosidic extract of 48 mg/kg and 96 mg/kg significantly resisted the immunosuppressive mice ear swelling and maintained it at nearly normal level. The enhanced, delayed hypersensitivity actions of glucosidic extract, suppressed by cyclophosphamide, might be brought about by inducing TH cell and regulating T lymphocytes subset.</p><p><b>CONCLUSIONS</b>The glucosidic extract from Yupingfeng has antiinflammatory and immunoregulation action, suggesting that these glucosides are the principal active components of the traditional Chinese prescription Yupingfeng.</p>

Inhibitory effect of 5-fluorouracil encapsulated by galactosylceramide liposomes on drug resistance and its mechanisms / 中国药理学通报

Aim To study inhibitory effect of 5-fluorouracil encapsulated by galactosylceramide liposomes (5-Fu-GCL)on 5-Fu-resistent HepG_2 cells and its mechanisms. Methods Inhibitory effect of 5-Fu-GCL on established model of 5-Fu-resistant HepG_2 cells was assessed with MTT assay in vitro. The concentration-time course of 5-Fu-GCL in intracellular fluid was detected with high performance liquid chromatography (HPLC). Thymidylic acid synthase (TS) expression was observed with immunohistochemical method,and NO content was determined with chemical method. Results Obvious inhibitory effects of 5-Fu-GCL (75,150,300,600,1200?mol?L-1) on 5-Fu-resistant HepG_2 cells were observed with IC_ 50 of 158.6 ?mol?L-1,far lower than that of free 5-Fu (400.9 ?mol?L-1). 5-Fu-GCL (300 ?mol?L-1) inhibited 5-Fu-resistant HepG_2 cells in a time-dependent manner,and the inhibitory effect of 5-Fu-GCL was stronger than that of free 5-Fu during 12～48 h. Compared with free 5-Fu,5-Fu-GCL (300 ?mol?L-1) increased the content of intracellular fluid in 5-Fu-resistant HepG_2 cells. 5-Fu-GCL(62.5,300,1200 ?mol?L-1) not only inhibited the expression of TS,but also increased the production of NO in 5-Fu-resistant HepG_2 cells,and these effects of 5-Fu-GCL(300,1200 ?mol?L-1) were stronger than those of free 5-Fu. Conclusion 5-Fu-GCL has inhibitory effect on 5-Fu-resistant HepG_2 cells. The effect may be related to the increased concentration of 5-Fu-GCL in intracellular fluid,inhibited expression of TS and increased production of NO.