以化學計量學方法探討環境因素對於柔軟指形珊瑚之活性代謝體差異影響

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題名:	以化學計量學方法探討環境因素對於柔軟指形珊瑚之活性代謝體差異影響 Exploring environmental factors affecting the bioactive metabolites from Sinularia flexibilis using chemometric approaches
作者:	毛惠如 MAO, HUI-JU
貢獻者:	生藥學研究所碩士班賴奎宏
關鍵詞:	柔軟指形珊瑚;二次代謝物;環境因子;MS/MS化學分子網絡;PCA;OPLS-DA Sinularia flexibilis;secondary metabolites;environmental factors;MS/MS molecular networking;PCA;OPLS-DA
日期:	2023-06-02
上傳時間:	2023-12-07 09:40:57 (UTC+8)
摘要:	海洋覆蓋了地球70%以上的表面積，富有許多值得開發的天然資源。Sinularia flexibilis 是一種軟珊瑚，由於缺乏外骨骼，軟珊瑚通常會透過化學防禦的方式產生次級代謝物來保護自身不受掠食者侵害，而這些具有生物活性的次級代謝物則為新藥開發之重要起源。本篇論文旨於探討在不同生長環境下柔軟指形珊瑚S. flexibilis所產生的次級代謝物差異。首先，應用超高效液相色譜結合四極桿飛行時間質譜獲得所有樣品的MS和MS/MS數據。接續以主成分分析 (Principal component analysis, PCA) 與正交偏最小二乘判別分析 (Orthogonal projections to latent structures discriminant analysis, OPLS-DA)針對所有代謝物進行差異分析，結果顯示野生與養殖珊瑚間存在顯著差異。進一步使用 MS/MS 數據構築分子網絡 (Molecular networking, MN) 圖譜。視覺化的分子網絡圖譜顯示，養殖型 S. flexibilis 軟珊瑚的化學結構多樣性較高，尤其含有較多的 diterpenoids和diterpene dimers骨架化合物。總結以上，由於誘發化學防禦的刺激來源差異，不同來源或不同生長環境的軟珊瑚表現的次級代謝物亦存在一定的差異，因此進一步尋找此等關鍵次級代謝物含量的變因，是將來養殖型珊瑚作為藥用成分量產的重要課題。 The ocean covers more than 70% of the earth's surface area and is rich in many natural resource worth developing. S. flexibilisis a species of soft coral that is lack of stony skeletons and usually protect themselves from predators through chemical defense. These chemical defensing metabolites are always a very important resources for new drug developments. In order to facilitate better selection of breeding conditions when a stable supply source is required for future new drug development, a strategy was established in our current study to discover the key compounds of S. flexibilis between different growth environments. First, MS and MS/MS data for all samples were obtained using ultra-high performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry. Followed by principal component analysis (PCA) and orthogonal projections to latent structures discriminant analysis (OPLS-DA) for differential analysis of all metabolites, the results showed that there were significant differences between wild and cultured corals. The MS/MS data were further used to construct molecular network (MN). The visualized MN profile showed that the cultured-type S. flexibilis exhibited a higher chemical diversity than cultured ones, especially containing more diterpenoids compounds. To sum up, due to the differences in the sources of stimuli that induce chemical defenses, there are also differences in the secondary metabolites exhibited by soft corals from different sources or in different growth environments. Therefore, it is necessary to find out the variables of the content of these key secondary metabolites in the future. This information could be applied to facilitate the mass production of cultured soft coral for future drug development.
描述:	碩士指導教授:賴奎宏委員:宋秉鈞委員:吳和澄委員:賴奎宏
資料類型:	thesis
顯示於類別:	[生藥學研究所] 博碩士論文

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