Genistein arrests cell cycle progression at G2-M

Genistein, an isoflavone, is a specific inhibitor of tyrosine kinase and topoisomerase II. However, its effect on cell growth is unknown. Therefore, we examined the effects of genistein on cell growth and cell cycle progression and compared its effects with other flavonoids. Genistein inhibited in a...

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Bibliographic Details
Published in:Cancer research (Chicago, Ill.) Ill.), 1993-03, Vol.53 (6), p.1328-1331
Main Authors: MATSUKAWA, Y, MARUI, N, SAKAI, T, SATOMI, Y, YOSHIDA, M, MATSUMOTO, K, NISHINO, H, AOIKE, A
Format: Article
Language:English
Subjects:
Antineoplastic agents
Biological and medical sciences
G2 Phase - drug effects
General aspects
Genistein
Growth Inhibitors - pharmacology
Humans
Isoflavones - pharmacology
Medical sciences
Mitosis - drug effects
Mitotic Index - drug effects
Pharmacology. Drug treatments
Stomach Neoplasms - pathology
Tumor Cells, Cultured - drug effects
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Summary:Genistein, an isoflavone, is a specific inhibitor of tyrosine kinase and topoisomerase II. However, its effect on cell growth is unknown. Therefore, we examined the effects of genistein on cell growth and cell cycle progression and compared its effects with other flavonoids. Genistein inhibited in a dose-dependent manner the growth of HGC-27 cells derived from human gastric cancer. Flow-cytometric analysis showed that genistein almost completely arrested the cell cycle progression at G2-M. This effect was reversible when genistein was removed from the culture medium. In contrast, other flavonoids such as flavone, luteolin, and the structurally similar daidzein arrested the cell cycle at G1. Consistent with the flow-cytometric analysis, microscopic observation showed that genistein did not increase the mitotic index, which supposes that genistein may arrest the cell cycle at G2 or early M. These results suggest that the G2-M arrest by genistein is a unique effect among flavonoids.
ISSN:0008-5472
1538-7445