Azaphilones Inhibit Tumor Promotion by 12-O-Tetradecanoylphorbol-13-Acetate in Two-Stage Carcinogenesis in Mice
作者:
Ken Yasukawa,
Masanao Takahashi,
Shinsaku Natori,
Ken-ichi Kawai,
Mikio Yamazaki,
Mieko Takeuchi,
Michio Takido,
期刊:
Oncology
(Karger Available online 1994)
卷期:
Volume 51,
issue 1
页码: 108-112
ISSN:0030-2414
年代: 1994
DOI:10.1159/000227320
出版商: S. Karger AG
关键词: Azaphilone;Monascus pigment;Inhibition of tumor promotion;12-O-Tetradecanoylphorbol-13-acetate;Two-stage carcinogenesis
数据来源: Karger
摘要:
Monascorubrin (an azaphilone derivative) was isolated from Monascus anka, ‘Monascus pigment’, a natural pigment of food additivies, was extracted from Monasucs spp., and chaetoviridin A, one of the azaphilones, was isolated from Chaetomium globosum var. flavo-viridae. Application of 1 ug of 12-O-tetradecanoylphorbol-13-acetate (TPA), a tumor promoting agent, to the mouse ear resulted in induction of inflammation. Among monascorubrin and related compounds assayed, monascorubrin, chaetoviridin A and its related compounds inhibited the inflammatory activity of TPA in mice. The 50% inhibitory dose of these compounds for TPA-induced inflammation was 0.4-1.5 μmol. Furthermore, monascorubrin (2 μmol), chaetoviridin A (2 μmol) and Monascus pigment (1 mg) markedly suppressed the promoting effect of TPA (1 μg) on skin tumor formation in mice initiated with 7,12-dimethylbenz[a]an-thracene (50 μg). It is assumed that the inhibition of tumor promotion by monascorubrin, chaetoviridin A and Monascus pigment is due to anti-inflammatory
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