Chemical constituents of Brazilian propolis and their cytotoxic activities.
The EtOAc-soluble fraction of the MeOH extract of propolis afforded a new prenylated chromane derivative, 3-hydroxy-2, 2-dimethyl-8-prenylchromane-6-propenoic acid (1), along with 22 known compounds, 2-23. Of the known compounds, 4, 7, 12-19, and 22 were isolated for the first time from propolis, and the absolute configuration of 23 was established as (2S,3R). Investigation suggested that Baccharis spp. are a significant source of tropical Brazilian propolis, in addition to Clusia minor, Clusia major, and Araucaria heterophylla. All the compounds were tested for their cytotoxicity toward human HT-1080 fibrosarcoma and murine colon 26-L5 carcinoma cells. Among these compounds, 9 and 19-21 showed potent cytotoxicity, having ED50 values equal to or less than 10 microg/mL.
Banskota
A H
AH
Department of Natural Products Chemistry, Research Institute for Wakan-Yaku (Traditional Sino-Japanese Medicines), Toyama Medical and Pharmaceutical University, 2630-Sugitani, Toya.
Tezuka
Y
Y
Prasain
J K
JK
Matsushige
K
K
Saiki
I
I
Kadota
S
S
D000818:Animals; D000970:Antineoplastic Agents / Q000737:chemistry* / Q000494:pharmacology*; D001938:Brazil; D004354:Drug Screening Assays, Antitumor; D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D051379:Mice; D011429:Propolis / Q000737:chemistry* / Q000494:pharmacology*; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D014407:Tumor Cells, Cultured
D000970:Antineoplastic Agents; D011429:Propolis