Antiproliferative activity of the Netherlands propolis and its active principles in cancer cell lines.
The MeOH extract of the Netherlands propolis showed promising antiproliferative activity toward highly liver-metastatic murine colon 26-L5 carcinoma with an EC(50) value of 3.5 microg/ml. Further, antiproliferative activity-guided purification of the MeOH extract led us to isolate four flavonoids (1-4), seven cinnamic acid derivatives (5-11) and two new glycerol derivatives (12, 13), whose structures were elucidated on the basis of spectral analysis. The isolated compounds were tested for their antiproliferative activity against murine colon 26-L5, murine B16-BL6 melanoma, human HT-1080 fibrosarcoma and human lung A549 adenocarcinoma cell lines. The benzyl (9), phenethyl (10) and cinnamyl caffeates (11) possessed potent antiproliferative activities with EC(50) values of 0.288, 1.76 and 0.114 microM, respectively, toward colon 26-L5 carcinoma. These caffeates were considered to be active constituents of the Netherlands propolis in their antiproliferative activity. The antioxidative activity of these caffeates may play an important role in their antiproliferative activities.
Banskota
Arjun H
AH
Department of Natural Products Chemistry, Institute of Natural Medicine, Toyama Medical and Pharmaceutical University, 2630-Sugitani, 930-0194, Toyama, Japan.
Nagaoka
Takema
T
Sumioka
Lucia Yoshie
LY
Tezuka
Yasuhiro
Y
Awale
Suresh
S
Midorikawa
Kiyoshi
K
Matsushige
Katsumichi
K
Kadota
Shigetoshi
S
D000818:Animals; D000970:Antineoplastic Agents / Q000302:isolation & purification* / Q000494:pharmacology*; D002455:Cell Division / Q000187:drug effects; D004354:Drug Screening Assays, Antitumor; D016166:Free Radical Scavengers / Q000494:pharmacology*; D006801:Humans; D051379:Mice; D009426:Netherlands; D011429:Propolis / Q000737:chemistry* / Q000494:pharmacology*; D014407:Tumor Cells, Cultured
D000970:Antineoplastic Agents; D016166:Free Radical Scavengers; D011429:Propolis