RESUMEN
A new chromone polymorchromone B was isolated and characterized from the roots of Angelica polymorpha Maxim, a commonly used traditional Chinese medicine. On the basis of spectroscopic analysis, including IR, HR-ESI-MS, 1D and 2D NMR spectral data, and hydrolysis followed by chromatographic analysis, the structure of the new chromone was elucidated as 5-hydroxy-2-[(angeloyloxy)methyl]-2'-(dimethyl)-3'-(2S,3S-epoxy-2-methylbutanoate)-dihydropyran [3',2':6,7]chromone. Moreover, it was found that polymorchromone B showed remarkable cytotoxic activity against A-549 cell lines.
Asunto(s)
Angelica/química , Antineoplásicos Fitogénicos/aislamiento & purificación , Antineoplásicos Fitogénicos/farmacología , Cromonas/aislamiento & purificación , Cromonas/farmacología , Antineoplásicos Fitogénicos/química , Cromonas/química , Ensayos de Selección de Medicamentos Antitumorales , Humanos , Estructura Molecular , Raíces de Plantas/químicaRESUMEN
AIM: To constructed the shRNA expressing vectors targeting HBsAg gene and HBeAg gene of HBV, Pgs1, Pgs2, Pgs3 and psiHBV4, psiHBV6 in order to prove their inhibitation on the HBV antigen expression in outlive HepG2. 2. 15 cells. METHODS: PTZ was used as negative control, both the shRNA expressing vectors targeting HBsAg and HBEAg gene of HBV was together transfected into HepG-2. 2. 15 cells with different combinations, and detected the expression liquid and the cultivated supernatant with MEIA after 24 h. RESULT: The group transfecting psiHbv4 and PgS2, psiHBV4 and PgS3 could significantly inhibit HBsAg and HBeAg expression compared with control group (P < 0.05) in the cell disruption liquid and the cultivated supernatant. But the group transfecting psiHBV5 and PgS1, psiHBV6 and PgS3 cannot significantly inhibit HBeAg expression (P > 0.05) in the cell disruption liquid. CONCLUSION: The shRNA expressing vectors targeting HBsAg and HBeAg gene of HBV psiHBV4 and PgS2, psiHBV4 and HBeS3 could significantly inhibit the antigen expression of HBV than only one.