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- W4242896475 abstract "Protease activity measurement has broad application in drug screening, diagnosis and disease staging, and molecular profiling. However, conventional immunopeptidemetric assays (IMPA) exhibit low fluorescence signal-to-noise ratios, preventing reliable measurements at lower concentrations in the clinically important picomolar to nanomolar range. Here, we demonstrated a highly sensitive measurement of protease activity using a nanoplasmonic resonator (NPR). NPRs enhance Raman signals by 6.1 × 1010 times in a highly reproducible manner, enabling fast detection of proteolytically active prostate-specific antigen (paPSA) activities in real-time, at a sensitivity level of 6 pM (0.2 ng/mL) with a dynamic range of 3 orders of magnitude. Experiments on extracellular fluid (ECF) from the paPSA-positive cells demonstrate specific detection in a complex biofluid background. This method offers a fast, sensitive, accurate, and one-step approach to detect the proteases’ activities in very small sample volumes." @default.
- W4242896475 created "2022-05-12" @default.
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- W4242896475 date "2010-02-02" @default.
- W4242896475 modified "2023-09-28" @default.
- W4242896475 title "Time-Resolved Single-Step Protease Activity Quantification Using Nanoplasmonic Resonator Sensors" @default.
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- W4242896475 doi "https://doi.org/10.1021/nn900757p" @default.
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