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lsysxh鐵桿木蟲 (著名寫手)
糖葫蘆
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[求助]
翻譯急用,一共七句話!30金幣奉上,翻譯的好可追加!
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Advanced microscopy solutions for monitoring the kinetics and dynamics of drug–DNA targeting in living cells Abstract Many anticancer drugs require interaction with DNA or chromatin components of tumor cells to achieve therapeutic activity. Quantification and exploration of drug targeting dynamics can be highly informative in the rational development of new therapies and in the drug discovery pipeline. The problems faced include the potential infrequency and transient nature of critical events, the influence of micropharmacokinetics on the drug–target equilibria, the dependence on preserving cell function to demonstrate dynamic processes in situ, the need to map events in functional cells and the confounding effects of cell-to-cell heterogeneity. We demonstrate technological solutions in which we have integrated two-photon laser scanning microscopy (TPLSM) to track drug delivery in subcellular compartments, with the mapping of sites of critical molecular interactions. We address key design concepts for the development of modular tools used to uncover the complexity of drug targeting in single cells. First, we describe the combination of two-photon excitation with fluorescence lifetime imaging microscopy (FLIM) to map the nuclear docking of the anticancer drug topotecan (TPT) at a subset of DNA sites in nuclear structures of live breast tumor cells. Secondly, we demonstrate how we incorporate the smart design of a two-photon “dark” DNA binding probe, such as DRAQ5, as a well-defined quenching probe to uncover sites of drug interaction. Finally, we discuss the future perspectives on introducing these modular kinetic assays in the high-content screening arena and the interlinking of the consequences of drug–target interactions with cellular stress responses. |
木蟲 (著名寫手)

至尊木蟲 (小有名氣)
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對該專業(yè)背景與術語不甚了解,以下內容僅供參考: 以活體細胞為目標用先進的顯微鏡方法監(jiān)控藥物和DNA之間的動力學 摘要: 很多抗癌藥物需要與DNA或腫瘤細胞的染色質成分相互作用以完成治療。以動力學為目標對藥物進行量化和研究能對新治療方法的合理發(fā)展及藥物發(fā)現(xiàn)途徑方面提供大量資料。面臨的問題包括臨界事件不多見性及瞬時性,微觀藥物代謝動力學對均衡藥物與目標的影響,為證明動態(tài)作用對保持細胞功能的依賴,需要繪制機能細胞活動及細胞對細胞異質性的混合效應。我們演示了雙光子激光集成掃描顯微鏡法以追蹤藥物在亞細胞空間的傳送的技術方法,給出了臨界分子相互作用位置圖。以單細胞為對象,為揭示藥物的復雜性,我們?yōu)槟K化工具的發(fā)展提出重要的設計理念。首先,記錄雙光子激感與成像顯微鏡熒光壽命的組合,繪制抗癌藥物TPT在活體胸部腫瘤細胞核心結構中DNA場子集的核心存放處;其次,說明我們怎樣使雙光子模糊約束探針的精確設計具體化,比如DRAQ5,作為定義明確的淬火探針揭示藥物相互作用的場所;最后,討論關于引進這些模塊化分析在高滿意度的屏蔽領域未來的前景及藥物-目標與細胞應力相互作用結果的內部聯(lián)系. |
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