An on-chip microfluidic-based electrochemical magneto-immunoassay for the determination of procalcitonin in plasma obtained from sepsis diagnosed preterm neonates

The Analyst
Águeda Molinero-FernándezAlberto Escarpa

Abstract

A novel on-chip electrochemical magneto-immunoassay for the determination of procalcitonin (PCT) has been proposed. The strategy involved the on-line performing of the biorecognition event and detection on the thin-film microfluidic gold electrode chamber operating at E = -0.20 V (vs. Au). The complete assay was performed in less than 15 minutes using only 25 μL of the sample, covering the entire range of clinically relevant PCT concentrations in sepsis diagnosis with a limit of detection and quantification of 0.02 ng mL-1 and 0.05 ng mL-1, respectively (the sepsis diagnosis threshold: 0.5 ng mL-1). The on-chip electrochemical magneto-immunoassay provided excellent results in the analysis of very unique samples obtained from preterm neonates admitted with suspected sepsis, in which the sample volume is hardly available. These characteristics fulfill the POCT requirements for PCT determination in the whole clinically relevant concentration range. Because of the high clinical relevance and the important role of PCT in sepsis, this approach opens new perspectives for sepsis diagnosis and therapy guidance using low volume samples.

References

Aug 14, 2001·American Journal of Respiratory and Critical Care Medicine·S HarbarthUNKNOWN Geneva Sepsis Network
Jul 28, 2006·Nature·George M Whitesides
Feb 11, 2010·Critical Care : the Official Journal of the Critical Care Forum·Charalampos Pierrakos, Jean-Louis Vincent
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Mar 28, 2019·SAGE Open Medicine·Bishal GyawaliAmit S Dhamoon

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Citations

Jun 8, 2021·Current Opinion in Colloid & Interface Science·Ebru Saatçi, Satheesh Natarajan
Jul 3, 2021·Sensors·Reena Sri SelvarajanAzrul Azlan Hamzah
Jan 27, 2022·Mikrochimica Acta·Alejandra Alba-PatiñoRoberto de la Rica

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Methods Mentioned

BETA
PCT
chip
ELISA

Software Mentioned

BRAHMS PCT

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