Structure activity relationship of annonaceous acetogenins against multidrug resistant human lung cancer cell line A549/Taxol in vitro / 中国中药杂志

10 kinds of annonaceous acetogenins were selected for antitumor activity testing against human lung cancer cell line A549/Taxol and the structure activity relationship was analyzed.MTT assay was used to detect the inhibitory activities of 10 kinds of annonaceous acetogenins and positive drugs against A549/Taxol cells, respectively uvariamicin-Ⅲ(1), uvariamicin-Ⅱ(2), annosquacin D(3), desacetyluvaricin(4), annosquatin A(5), squamostatin D(6), bullatacin(7), squamocin(8), motrilin(9), annosquatin B(10), verapamil and cisplatin. Annonaceous acetogenins showed significant inhibitory activities against A549/Taxol cells, and were more potent than the positive drug verapamil and cisplatin.The more carbon atoms between the tetrahydrofuran ring and the lactone ring of annonaceous acetogenins exhibited more potency.Besides,ACGs with two substituted hydroxyl showed more potency than the compounds with three substituted hydroxyl in the bis-adjacent-THF ACGs. Furthermore, ACGs with three substituted hydroxyl showed more potency than the compounds with four substituted hydroxyl among the no bis-adjacent-THF ACGs.

Studies on chemical constituents from seed of Psoralea corylifolia / 中国中药杂志

<p><b>OBJECTIVE</b>To study the chemical constituents of Psoralea corylifolia.</p><p><b>METHOD</b>Chromatographic methods were used to separate compounds, and spectroscopic methods were used to determine the structures.</p><p><b>RESULT</b>Five compounds were isolated and identified as furano (2", 3", 7, 6)-4'-hydroxyflavanone (1), psoralidin (2), genistein (3), psoralen (4), isopsoralen (5).</p><p><b>CONCLUSION</b>Compounds 1 was a new compound named psoraleflavanone. And 13C-NMR data of compound 2 were assined for the first time.</p>

Synergistic effect of schwann cells and retinoic acid on differentiation and synaptogenesis of hippocampal neural stem cells in vitro / 生物医学与环境科学（英文）

<p><b>OBJECTIVE</b>To investigate the synergistic effect of Schwann cells (SCs) and retinoic acid (RA) on differentiation and synaptogenesis of neural stem cells (NSCs) derived from hippocampus of neonatal rats.</p><p><b>METHODS</b>The classical method for 2x2 factorial analysis experiment was used to assess synergistic action of SCs and RA. NSCs were treated with RA, SCs, and SCs + RA in DMEM/F12 with 0.5% fetal bovine serum for six days, respectively. Double immunofluorescent staining was used to detect the differentiation of NSCs including nestin, glial fibrillary acidic protein (GFAP) and Map2. The expression of PSD95 was used to demonstrate synaptogenesis.</p><p><b>RESULTS</b>After NSCs were treated with RA or SCs, the expression of nestin and GFAP was significantly decreased while the expression of Map2 and PSD95 was significantly increased in comparison with the control. Factorial ANOVA showed that interactions between SCs and RA could induce the expression of Map2 and PSD95.</p><p><b>CONCLUSION</b>SCs and RA could promote synergistically the neuronal differentiation and synaptogenesis of hippocampal neural stem cells in vitro while they decreased the astrocytes and nestin positive NSCs.</p>