Inhibition of the tumor promoting action of 12-O-tetradecanoylphorbol-13-acetate by tubeimoside III isolated from Bolbostemma paniculatum.
As tubeimoside I isolated from Bolbostemma paniculatum (Maxim.) Franquet (Cucurbitaceae) has been shown to suppress tumor promoter effects, tubeimoside III from the same plant was tested in vitro and in vivo against the action of the tumor promoter 12-O-tetradecanoylphorbol-13-acetate (TPA). Tubeimoside III, the natural analog of tubeimoside I, also had an anti-inflammatory effect on mouse ear edema induced by arachidonic acid and TPA and a potent anti-tumor promoting effect on two-stage carcinogenesis of mouse skin after topical application. However, the important difference in bioactivities between tubeimosides I and III is the non-activity of tubeimoside III as an inhibitor of tumor promotion if administered orally. Differences in metabolism connected with different routes of the compound may be one of a number of explanations of the important difference.
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Department of Biochemistry, Shaanxi Provincial Academy of Traditional Chinese Medicine and Pharmacology, Xian, People's Republic of China.
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D000818:Animals; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000494:pharmacology*; D016588:Anticarcinogenic Agents / Q000494:pharmacology*; D002240:Carbohydrate Sequence; D002460:Cell Line; D004365:Drugs, Chinese Herbal / Q000737:chemistry / Q000494:pharmacology*; D008297:Male; D051379:Mice; D008809:Mice, Inbred C3H; D008969:Molecular Sequence Data; D010743:Phospholipids / Q000378:metabolism; D010946:Plants, Medicinal / Q000737:chemistry*; D012503:Saponins / Q000494:pharmacology*; D012878:Skin Neoplasms / Q000139:chemically induced; D013755:Tetradecanoylphorbol Acetate / Q000037:antagonists & inhibitors* / Q000633:toxicity; D014315:Triterpenes / Q000494:pharmacology*; D014316:Tritium
D000894:Anti-Inflammatory Agents, Non-Steroidal; D016588:Anticarcinogenic Agents; D004365:Drugs, Chinese Herbal; D010743:Phospholipids; D012503:Saponins; D014315:Triterpenes; D014316:Tritium; C097303:tubeimoside III; D013755:Tetradecanoylphorbol Acetate