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SERS analysis of carcinoma-associated fibroblasts in a tumor microenvironment based on targeted 2D nanosheets.
Nanoscale ( IF 5.8 ) Pub Date : 2020-01-08 , DOI: 10.1039/c9nr08754k
Dongling Li 1 , Haihong Yu , Zhouyi Guo , Shengtao Li , Yang Li , Yanxian Guo , Huiqing Zhong , Honglian Xiong , Zhiming Liu
Affiliation  

Carcinoma-associated fibroblasts (CAFs), one of the most important components of a tumor microenvironment (TME), play a significant role in the complex tumorigenesis process. Herein, the evolution of CAFs in TME is elaborately investigated by surface-enhanced Raman spectroscopy (SERS), a molecular fingerprint technique. Two-dimensional (2D) nanocomposites consisting of gold nanoparticles and a supramolecular "PCsheet" self-assembled between 2D nanosheets and oxidized phosphatidylcholine (PC) are fabricated as SERS-active probes to specifically recognize the CD36 receptor on the cytomembrane of the fibroblasts, a reliable landmark of CAF development. The 2D SERS substrates can also illuminate the fingerprint information around the CD36 protein with high detection sensitivity, which helps elucidate the biochemical component transition in the protein mini-domain during carcinoma progression. Visualized data are then supplied by label-free SERS imaging to exploit the distribution of biomolecules on the plasma membrane. In addition, the repressed expression of CD36 in TME is detected in lung metastasis tumor-bearing mice. This study based on the 2D SERS technique opens up an alternative avenue for unveiling carcinoma-associated molecular events.

中文翻译:

基于靶向二维纳米片的肿瘤微环境中与癌相关的成纤维细胞的SERS分析。

癌相关成纤维细胞(CAF)是肿瘤微环境(TME)的最重要组成部分,在复杂的肿瘤发生过程中起着重要作用。在本文中,通过表面增强拉曼光谱(SERS),一种分子指纹技术,详细研究了TME中CAF的演化。将由金纳米颗粒和在2D纳米片之间自组装的超分子“ PCsheet”和氧化的磷脂酰胆碱(PC)组成的二维(2D)纳米复合材料制成SERS活性探针,以特异性识别成纤维细胞,细胞膜和细胞膜上的CD36受体。 CAF发展的可靠里程碑。2D SERS底物还可以高检测灵敏度照亮CD36蛋白周围的指纹信息,这有助于阐明癌症进展过程中蛋白质小结构域中的生化成分过渡。然后通过无标记的SERS成像提供可视化数据,以利用生物分子在质膜上的分布。此外,在携带肺转移瘤的小鼠中检测到TME中CD36的表达受到抑制。这项基于2D SERS技术的研究为揭示与癌症相关的分子事件开辟了另一条途径。
更新日期:2020-01-08
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