2 ガガイモ科及びナス科植物のステロイドとその細胞分化誘導活性(口頭発表の部)

概要

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Although much attention has been given to cell differentiation inducers as new types of anti-tumore agent, only a few studies has been reported on differentiation inducers from plant sorces. Therefore, we have searched for naturally occouring substances which induce differnciation of leukemia cells. From Condurango Cortex (Marsdenia condurango) (Asclepidaceae) and Periplocae Cortex (Periploca sepium B.) (Asclepidaceae), many kids of pregnan derivatives and some cardenolides. From withania (Withania somnifera) (Solanaceae) (using Indian market withania and withania cultivated at the medicinal plant garden of this university), more than thirty kinds of withanolides were isolated. From Physalis alkekengi (Solanaceae), physalin and neophysalin derivatives were isolated. Structural elucidation of these 60 kinds of steroid derivatives were carried out by means of spectral methods, especially using NMR spectroscopy including H-H COSY, H-C COSY, HMBC, NOE technics. These steroidal derivatives were tested on cell differentiatio inducing activity against mouse myeloid leukemia (M1) cells. Many kinds steroid derivatives showed the activity. Of these active compounds, some kinds of withanolids, 27, 33, 34 and 35 having 4β-hydroxy-5β,6β-epoxy-2-en-1-one structure of AB ring, showed potent differentiation inducing activity.
天然有機化合物討論会の論文
1994-09-20