Dynamic cellular maps of molecular species: Application to drug-target interactions.

Dynamic cellular maps of molecular species: Application to drug-target interactions.
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分子物种的动态细胞图:应用于药物目标相互作用。

DOI:
10.1038/s41598-018-19694-3
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发表时间:
2018-01-18
期刊:
影响因子:
4.6
通讯作者:
Lillo MP
Lillo MP
中科院分区:
综合性期刊3区
文献类型:
--
作者:
García C;Losada A;Sacristán MA;Martínez-Leal JF;Galmarini CM;Lillo MP

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活细胞研究的设计旨在破译药物靶向具有多种功能的蛋白质的作用机制,在广泛的浓度和细胞位置表达,是一个真实的挑战。我们最近发现,抗肿瘤药物plitidepsin(APL)定位足够接近的延伸因子eEF 1A 2,从而表明在活细胞中形成的药物-蛋白质复合物。在这里,我们提出了我们以前的显微光谱研究的扩展,结合广义偏振(GP)图像,相量方法和荧光寿命成像显微镜(FLIM),使用7-氨基香豆素药物类似物(APL*)作为荧光示踪剂。使用所提出的方法,我们能够在真实的时间内跟踪两组APL-靶复合物在活细胞中的形成和相对分布,揭示了HeLa-wt和APL抗性HeLa-APL-R细胞的两种不同的行为模式。所获得的信息可以补充和促进新实验的设计以及对用其他生物化学和细胞生物学方法获得的结果的全面解释,并可能开辟新的研究途径,以破译新药的作用机制。
The design of living cell studies aimed at deciphering the mechanism of action of drugs targeting proteins with multiple functions, expressed in a wide range of concentrations and cellular locations, is a real challenge. We recently showed that the antitumor drug plitidepsin (APL) localizes sufficiently close to the elongation factor eEF1A2 so as to suggest the formation of drug-protein complexes in living cells. Here we present an extension of our previous micro-spectroscopy study, that combines Generalized Polarization (GP) images, with the phasor approach and fluorescence lifetime imaging microscopy (FLIM), using a 7-aminocoumarin drug analog (APL*) as fluorescence tracer. Using the proposed methodology, we were able to follow in real time the formation and relative distribution of two sets of APL-target complexes in live cells, revealing two distinct patterns of behavior for HeLa-wt and APL resistant HeLa-APL-R cells. The information obtained may complement and facilitate the design of new experiments and the global interpretation of the results obtained with other biochemical and cell biology methods, as well as possibly opening new avenues of study to decipher the mechanism of action of new drugs.
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