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  • 學位論文

龍珠化學成分及其生物活性之研究

Studies on the Chemical Constituents and Cytotoxicity of Tubocapsicum anomalum (Franch. & Sav.)Makino

指導教授 : 吳永昌 張芳榮
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摘要


龍珠(Tubocapsicum anomalum (Franch. & Sav.)Makino)屬於茄科(Solanaceae),龍珠屬(Tubocapsicum)植物,主要分佈於東南亞地區,海拔約0-2,000 m。在台灣,本植物被視為民間用藥(folk medicine)治療淋病、痢疾、腎炎以及腫毒。由於本實驗室初步的細胞毒殺活性篩選顯示龍珠具有活性(IC50:18.79 µg/mL, MCF 7 cell line),因而選擇龍珠,做為研究題材,探討其化學成分與其生物活性作用。 由龍珠全草進行化學成分分離與純化,共得到二十三個化合物,包括:十八個withanolides:tubocapsenolide A(1)、tubocapsenolide B(2)、tubocapsenolide C(3)、tubocapsenolide D(4)、tubocapsenolide E(5)、tubocapsenolide F(6)、tubocapsenolide G(7)、tubocapsanolide A(8)、tubocapsanolide B(9)、tubocapsanolide C(10)、tubocapsanolide D(11)、tubocapsanolide E(12)、anomanolide A(13)、anomanolide B(14)、anomanolide C(15)、anomanolide D(16)、anomanolide E(17)、tubonolide A(18);四個steroids:β-sitosterol(19)與stigmasterol(20)混合物、β-sitosteryl-3-O-β-D-glucoside(21)與stigmasteryl-3-O- β-D-glucoside(22)混合物;一個diterpenoid: phytol(23)。 其中化合物1~18為新化合物;19~23為首次自龍珠屬植物分離而得,所有化合物都經由光譜及質譜分析加以證明。 上述化合物在生物活性試驗中,顯示此系列化合物的活性對於liver cancer cell lines(Hep 3B、Hep G2)與breast cancer cell lines(MDA-MB-231、MCF 7)具有細胞毒殺作用,其中,對Hep 3B及MDA-MB-231具有較佳的選擇性。

關鍵字

龍珠 茄科 細胞毒殺

並列摘要


Tubocapsicum anomalum (Franch. & Sav.)Makino belongs to Solanaceae family and distributes in the Southeast Asia over sea-level about 0-2,000 m mainly. This plant is also a folk medicine for gonorrhea, dysentery, nephritis and swells the poison. The crude extraction of this plant showed slight cytotoxicity(IC50:18.79 µg/mL, MCF 7 cell line). Therefore, we chose the plant as our research topic. We tried to disclose the active components in the plant of Tubocapsicum anomalum (Franch. & Sav.)Makino and their bioactivity. Twenty three compounds were isolated from the whole plant of Tubocapsicum anomalum (Franch. & Sav.)Makino, including eighteen withanolides:tubocapsenolide A(1), tubocapsenolide B(2), tubocapsenolide C(3), tubocapsenolide D(4), tubocapsenolide E(5), tubocapsenolide F(6), tubocapsenolide G(7), tubocapsanolide A(8), tubocapsanolide B(9), tubocapsanolide C(10), tubocapsanolide D(11), tubocapsanolide E(12), anomanolide A (13), anomanolide B(14), anomanolide C(15), anomanolide D(16), anomanolide E(17), and tubonolide A(18), four steroids:the mixture of?nβ-stiosterol(19) and stigamsterol(20), and the mixture of β-sitosteryl-3-O-β-D-glucoside(21) and stigmasteryl-3-O-β-D-glucoside(22), and one diterpene: phytol(23). Among them, 1~18 are new compounds. Compounds 19~23, were found for the first time from the genus of Tubocapsicum. The structures of these compounds were identified by spectroscopic and mass data. The bioactivity assay indicated that these withanolides exhibited significant cytotoxicity toward liver cancer cells(Hep 3B、Hep G2) and breast cancer cells(MDA-MB-231、MCF 7). Among them, withanolides showed better selectivity toward Hep 3B and MDA-MB-231 cell lines.

參考文獻


第七章? 參考文獻
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