Precise Molecular Profiling of Circulating Exosomes
Using a Metal–Organic Framework-Based Sensing Interface and
an Enzyme-Based Electrochemical Logic Platform
posted on 2022-01-04, 21:43authored byFei Wang, Yueyue Gui, Wentao Liu, Chao Li, Yucai Yang
Exosomes
have emerged as a promising circulating tumor biomarker;
however, it is a big challenge for convenient, multiparametric, and
accurate profiling of tumorous exosomes due to their unique structure
and heterogeneity. To address these problems, we develop a highly
integrated electrochemical platform for molecular profiling of tumor
exosomes. A metal–organic framework-functionalized sensing
interface is fabricated through a simple self-growth process, which
collects exosomes from biofluids without additional separation steps.
Meanwhile, a sensing strategy is designed to analyze both exosomal
protein and RNA markers on a single chip based on the unique sensor
architecture, allowing detection of low-abundance targets (∼250
vesicles in a 10 μL sample) using an integrated microfluidic
electrochemical device. Furthermore, a multiple-input, protein enzyme-based
logic gate is introduced into the system to accurately identify breast
cancer patients with 100% sensitivity and specificity, thus revealing
the advantageous role of logical profiling of exosomes in early diagnostics
of tumor.