Isolation of Apoptosis- and Differentiation-Inducing Substances toward Human Promyelocytic Leukemia HL-60 Cells from Leaves of Juniperus taxifolia
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概要
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A chloroform extract of the leaves of Juniperas taxifolia exhibited a marked antiproliferative effect on human promyelocytic leukemia HL-60 cells at a concentration of 2.5 μg/ml. Deoxypodophyllotoxin (4) was identified in the extract as an outstanding antiproliferative compound, and five diterpenes (1–3, 5, and 6) were isolated as known compounds with weak or no cytotoxicity. These compounds were examined for their respective apoptosis- and differentiation-inducing activities toward HL-60 cells by DNA fragmentation and NBT-reducing assays, respectively. Among them, 7α-hydroxysandaracopimaric acid (6) was found to have a potent differentiation-inducing activity in a dose-dependent manner at 0.125–2 μg/ml (0.39–6.29 μM), together with apoptosis-inducing activity at concentrations of more than 2.5 μg/ml (7.86 μM). Deoxypodophyllotoxin (4) that exerted cytotoxic and apoptosis-inducing activities at 2 ng/ml (5 nM) did not induce differentiation at the same concentration, and the other diterpenes (1–3 and 5) showed no effect on cell differentiation, even at 5 μg/ml. It was thus demonstrated for the first time that 7α-hydroxysandaracopimaric acid was an effective differentiation-inducing compound toward HL-60 cells.
- 社団法人 日本農芸化学会の論文
著者
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Tatemoto Hideki
Faculty Of Agriculture University Of The Ryukyus
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NAKANISHI Tsutomu
Faculty of Pharmaceutical Sciences,Setsunan University
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INADA Akira
Faculty of Pharmaceutical Sciences,Setsunan University
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MURATA Hiroko
Faculty of Pharmaceutical Sciences,Setsunan University
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INATOMI Yuka
Faculty of Pharmaceutical Sciences,Setsunan University
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Muto Norio
Faculty Of Life And Environmental Sciences Prefectural University Of Hiroshima
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Tomokuni Tatsuru
School of Bioresources, Hiroshima Prefectural University
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Haramoto Mari
Faculty of Life and Environmental Sciences, Prefectural University of Hiroshima
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