Anti-tumor effects of water-soluble propolis on a mouse sarcoma cell line in vivo and in vitro

Kohei Inoue, Masayoshi Saito, Takao Kanai, Tetsuya Kawata, Naoyuki Shigematsu, Takashi Uno, Kouichi Isobe, Cui Hua Liu, Hisao Ito

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

The honeybee product propolis and its extracts are known to have biological effects such as antibiotic, anti-viral, anti-inflammatory and anti-tumor activities. This study was designed to investigate whether water-soluble propolis (WSP) inhibits tumor growth. The tumor cell line used was mouse sarcoma 180 (S-180), and its growth was determined in vitro and in vivo with exposure to different concentrations of WSP. The effects of WSP on tumor cells in vitro were evaluated by measuring the intracellular uptake of 3H-thymidine. 3H-thymidine uptake was inhibited in accordance with the concentration of WSP. The minimum concentration of WSP necessary for 3H-thymidine uptake inhibition was 1.0 μg/ml and uptake was suppressed to 88% of the level in non-treated cells at this concentration. In an experiment using tumor-bearing mice, oral administration of WSP was begun 24 hours after transplantation of S-180 cells. WSP was administered to the mice 5 times, every other day for 10 days. The doses were 320 mg/kg (10 mg/mouse) or 960 mg/kg (30 mg/mouse) of body weight. All mice were sacrificed 10 days after transplantation, and tumor growth was evaluated. The orally administered WSP significantly inhibited the growth of transplanted tumors (p < 0.05). Furthermore, histological findings revealed a significant reduction in mitotic cells and tumor invasion of the muscular tissue at both dose-levels of WSP.

Original languageEnglish
Pages (from-to)625-634
Number of pages10
JournalAmerican Journal of Chinese Medicine
Volume36
Issue number3
DOIs
Publication statusPublished - 2008 Jun 18

Keywords

  • Anti-tumor effect
  • Mouse sarcoma cells
  • Propolis

ASJC Scopus subject areas

  • Complementary and alternative medicine

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