Cytotoxic alkaloids from Boehmeria siamensis.
Two new phenanthroquinolizidine alkaloids, boehmeriasins A and B, were isolated from the aqueous ethanolic extract of Boehmeria siamensis Craib (Urticaceae) by bioassay-guided fractionation. Their structures were elucidated on the basis of spectral evidence. Boehmeriasin A possesses cytotoxic activity against 12 cell lines from 6 panels of cancer including lung cancer, colon cancer, breast cancer, prostate cancer, kidney cancer and leukemia with GI (50) between 0.2 and 100 ng/mL, whereas boehmeriasin B showed lower activity.
Chengdu Institute of Biology, the Chinese Academy of Sciences, Chengdu 610-041, P. R. China.
Yinggang
Y
Luo
Yan
Y
Liu
Dixiang
D
Luo
Xiaoping
X
Gao
Bogang
B
Li
Guolin
G
Zhang
D000470:Alkaloids / Q000008:administration & dosage / Q000494:pharmacology / Q000627:therapeutic use; D000972:Antineoplastic Agents, Phytogenic / Q000008:administration & dosage / Q000494:pharmacology* / Q000627:therapeutic use; D032402:Boehmeria; D045744:Cell Line, Tumor / Q000187:drug effects; D004305:Dose-Response Relationship, Drug; D006801:Humans; D020128:Inhibitory Concentration 50; D017239:Paclitaxel / Q000494:pharmacology; D010616:Phenanthrenes / Q000008:administration & dosage / Q000494:pharmacology / Q000627:therapeutic use; D008517:Phytotherapy; D010936:Plant Extracts / Q000008:administration & dosage / Q000494:pharmacology* / Q000627:therapeutic use; D054837:Quinolizidines / Q000008:administration & dosage / Q000494:pharmacology / Q000627:therapeutic use
D000470:Alkaloids; D000972:Antineoplastic Agents, Phytogenic; D010616:Phenanthrenes; D010936:Plant Extracts; D054837:Quinolizidines; C000602799:boehmeriasin A; D017239:Paclitaxel