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Gold island films as biocompatible SERS substrates for imaging of the intracellular distribution of anticancer drugs

机译:金岛膜作为生物相容性SERS底物,用于成像抗癌药物的细胞内分布

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Abstract: Highly reproducible and stable surface gold island films exhibiting long-range enhancement have been investigated and characterized as compatible for biological systems. These surface-enhanced Raman scattering (SERS) substrates allowed the non-invasive detection of micromolar concentrations of antitumor drugs using red and near-infrared excitations. Thus, good quality SERS spectra of dimethylcrocetin (DMCRT) in a single living HL60 cell have been recorded on these substrates using red excitation, without any noticeable perturbation of the cell integrity. Comparison of these spectra with FT-Raman data obtained in HL60 cells on one hand, and with FT-SERS data of the DMCRT-retinoic acid receptor (RAR) complex on the other, shows practically the same spectral profiles. However, it should be noted that with the red laser the spectrum gives additional information on the cellular components. Similarity between the signal of DMCRT-treated K562 cells and the free drug is explained by either an absence of RAR in this cell line or a lack of binding. !6
机译:摘要:研究了具有长距离增强作用的高可复制性和稳定性的表面金岛膜,并认为其与生物系统相容。这些表面增强的拉曼散射(SERS)底物允许使用红色和近红外激发非侵入性检测微摩尔浓度的抗肿瘤药物。因此,已经在单个底物HL60细胞中使用红色激发在这些底物上记录了高质量的二甲基丙烯醛(DMCRT)SERS光谱,而没有任何明显的细胞完整性扰动。这些光谱一方面与在HL60细胞中获得的FT-拉曼数据进行比较,另一方面与DMCRT-视黄酸受体(RAR)络合物的FT-SERS数据进行比较,显示出几乎相同的光谱曲线。但是,应注意,使用红色激光时,光谱会提供有关细胞成分的其他信息。 DMCRT处理的K562细胞信号与游离药物之间的相似性可以通过该细胞系中不存在RAR或不存在结合来解释。 !6

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