微泡
癌症
表面增强拉曼光谱
癌细胞
纳米技术
液体活检
循环肿瘤细胞
癌症研究
乳腺癌
材料科学
癌症生物标志物
化学
拉曼光谱
医学
转移
内科学
小RNA
生物化学
物理
拉曼散射
光学
基因
作者
Xinyue Li,Meysam Keshavarz,Panagiotis Kassanos,Zahra Kidy,Alfie Roddan,Eric M. Yeatman,Alexander Thompson
标识
DOI:10.1002/adsr.202200039
摘要
Abstract At present, there are no cancer treatments that are both non‐invasive and highly accurate. New tests that can diagnose cancer at an early stage would help to facilitate such improved therapies, and many recent studies have focused on the development of liquid biopsy tests for this purpose. Exosomes are extracellular vesicles secreted by cells as a means of communication that can be simply collected from blood samples. Current studies have shown the potential of surface‐enhanced Raman spectroscopy (SERS) in differentiating cancerous cells from healthy cells. Herein, a bespoke platinum‐black (Pt‐black) SERS template is developed—via a cost‐effective fabrication method of electroplating—to detect malfunctioned (cancerous) exosomes. The results demonstrate that the Pt‐black SERS substrate exhibits stable and consistent spectra, which produces the high reproducibility required for a reliable diagnostic template. More importantly, using the Pt‐black SERS template allows for the differentiation of cancer‐derived exosomes (extracted from 4T1 cells—a triple‐negative breast cancer cell line) and exosomes from healthy fibroblast cells with an 83.3% sensitivity and a 95.8% specificity. This study establishes the potential of the Pt‐black template in detecting cancerous exosomes and lays a solid foundation for future studies in the clinical application of SERS in cancer diagnosis.
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