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Deprecated: Implicit conversion from float 267.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Nat+Biomed+Eng 2021 ; 5 (7): 666-677 Nephropedia Template TP
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Rapid single-molecule detection of COVID-19 and MERS antigens via nanobody-functionalized organic electrochemical transistors #MMPMID34031558
Guo K; Wustoni S; Koklu A; Diaz-Galicia E; Moser M; Hama A; Alqahtani AA; Ahmad AN; Alhamlan FS; Shuaib M; Pain A; McCulloch I; Arold ST; Grunberg R; Inal S
Nat Biomed Eng 2021[Jul]; 5 (7): 666-677 PMID34031558show ga
The coronavirus disease 2019 (COVID-19) pandemic has highlighted the need for rapid and sensitive protein detection and quantification in simple and robust formats for widespread point-of-care applications. Here, we report on nanobody-functionalized organic electrochemical transistors with a modular architecture for the rapid quantification of single-molecule-to-nanomolar levels of specific antigens in complex bodily fluids. The sensors combine a solution-processable conjugated polymer in the transistor channel and high-density and orientation-controlled bioconjugation of nanobody-SpyCatcher fusion proteins on disposable gate electrodes. The devices provide results after 10 min of exposure to 5 mul of unprocessed samples, maintain high specificity and single-molecule sensitivity in human saliva and serum, and can be reprogrammed to detect any protein antigen if a corresponding specific nanobody is available. We used the sensors to detect green fluorescent protein, and severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) and Middle East respiratory syndrome coronavirus (MERS-CoV) spike proteins, and for the COVID-19 screening of unprocessed clinical nasopharyngeal swab and saliva samples with a wide range of viral loads.
|Biosensing Techniques/*methods[MESH]
|COVID-19/virology[MESH]
|Humans[MESH]
|Middle East Respiratory Syndrome Coronavirus/*pathogenicity[MESH]