Point-of-Care Testing for Multiple Cardiac Markers Based on a Snail-Shaped Microfluidic Chip

Binfeng Yin; Xinhua Wan; Changcheng Qian; A S M Muhtasim Fuad Sohan; Songbai Wang; Teng Zhou

doi:10.3389/fchem.2021.741058

Point-of-Care Testing for Multiple Cardiac Markers Based on a Snail-Shaped Microfluidic Chip

Front Chem. 2021 Oct 4:9:741058. doi: 10.3389/fchem.2021.741058. eCollection 2021.

Authors

Binfeng Yin¹, Xinhua Wan¹, Changcheng Qian¹, A S M Muhtasim Fuad Sohan¹, Songbai Wang², Teng Zhou³

Affiliations

¹ School of Mechanical Engineering, Yangzhou University, Yangzhou, China.
² School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, China.
³ Mechanical and Electrical Engineering College, Hainan University, Haikou, China.

Abstract

Existing methods for detecting cardiac markers are difficult to be applied in point-of-care testing (POCT) due to complex operation, long time consumption, and low sensitivity. Here, we report a snail-shaped microfluidic chip (SMC) for the multiplex detection of cTnI, CK-MB, and Myo with high sensitivity and a short detection time. The SMC consists of a sandwich structure: a channel layer with a mixer and reaction zone, a reaction layer coated with capture antibodies, and a base layer. The opening or closing of the microchannels is realized by controlling the downward movement of the press-type mechanical valve. The chemiluminescence method was used as a signal readout, and the experimental conditions were optimized. SMC could detect cTnI, CK-MB, and Myo at concentrations as low as 1.02, 1.37, and 4.15. The SMC will be a promising platform for a simultaneous determination of multianalytes and shows a potential application in POCT.

Keywords: POCT; cardiac markers; chemiluminescence; multiplex detection; snail-shaped microfluidic chip.