Anti-HIV-1 activities of extracts and phenolics from Smilax China l.

Four extracts [EtOH, CHCl[3], EtOAc, and BuOH] and five phenolics [dihydrokaempferol [1], resveratrol [2], kaempferol-7-O-beta-D-glucoside [3], dihydrokaempferol-3-O-alpha-L-rhamnoside [4], oxyresveratrol [5]] from Smilax china L. was evaluated for anti-HIV-1 activities and cytotoxicity activities in vitro. All these extracts and phenolics showed lower or no cytotoxicity at a concentration ranged from 0.8 microg/mL to 100 microg/mL, but some showed potential anti-HIV-1 activities, that is, BuOH extract and compound 2 showed higher anti-HIV-1 activities than other extracts and compounds in the tested concentrations. EtOAc extract and compound 1 and 3 showed moderate anti-HIV-1 activities at a concentration higher than 4 microg/mL. In the end, the structure-activity relationship of four extracts and five phenolics was discussed.

In vitro tumor cytotoxic activities of extracts from three Liriodendron plants

The extracts prepared from Liriodendron tulipifera Linn., L. chinense [Hemsl.] Sarg., and their hybrid L. chinense x L. tulipifera, were investigated for their cytotoxic abilities in vitro against five human cancer cell lines: MDAMB-231 and MCF-7 breast cancer cells, SGC-7901 gastric cancer cells, HuH-7 hepatocarcinoma cells, and HCT-15 colon carcinoma cells, and then measured their phenols and alkaloids contents. Of these plant extracts, some of them, especially the lower polar extracts from barks, exhibited potent cytotoxic effects on five tested tumor cell lines