Protein detection in blood with single-molecule imaging.

Protein detection in blood with single-molecule imaging.
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DOI:
10.1126/sciadv.abg6522
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发表时间:
2021-08
期刊:
影响因子:
13.6
通讯作者:
Hung CF
Hung CF
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Mao CP;Wang SC;Su YP;Tseng SH;He L;Wu AA;Roden RBS;Xiao J;Hung CF

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A single-molecule imaging approach detects individual disease-specific protein molecules in blood samples. The ability to characterize individual biomarker protein molecules in patient blood samples could enable diagnosis of diseases at an earlier stage, when treatment is typically more effective. Single-molecule imaging offers a promising approach to accomplish this goal. However, thus far, single-molecule imaging methods have not been translated into the clinical setting. The detection limit of these methods has been confined to the picomolar (10−12 M) range, several orders of magnitude higher than the circulating concentrations of biomarker proteins present in many diseases. Here, we describe single-molecule augmented capture (SMAC), a single-molecule imaging technique to quantify and characterize individual protein molecules of interest down to the subfemtomolar (<10−15 M) range. We demonstrate SMAC in a variety of applications with human blood samples, including the analysis of disease-associated secreted proteins, membrane proteins, and rare intracellular proteins. SMAC opens the door to the application of single-molecule imaging in noninvasive disease profiling.
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