Journal
BIOSENSORS & BIOELECTRONICS
Volume 201, Issue -, Pages -Publisher
ELSEVIER ADVANCED TECHNOLOGY
DOI: 10.1016/j.bios.2021.113958
Keywords
Acute myocardial infarction; Early diagnosis; Heart-type fatty acid binding protein; Organic photoelectrochemical transistor; Ascorbic acid-mediated sensing
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Funding
- National Natural Science Foundation of China [61771318, 21806111, 22176130]
- Natural Science Foundation of Shenzhen [JCYJ20190808142217123]
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The AA-mediated OPECT sensing strategy provides a simple, fast, and accurate method for detecting heart-type fatty acid binding protein in patients with acute myocardial infarction.
Heart-type fatty acid binding protein (H-FABP) has been regarded as a promising biomarker for early diagnosis of acute myocardial infarction (AMI). Developing fast and reliable method for H-FABP detection is still highly desirable but challenging. Herein, an ascorbic acid (AA)-mediated organic photoelectrochemical transistor (OPECT) sensing strategy was reported for the detection of H-FABP in phosphate buffer saline (PBS) solution and human serum. A primary antibody/H-FABP/secondary antibody-Au NPs-alkaline phosphatase (ALP) sandwich immunorecognition structure was constructed. The modified ALP could catalytically convert ascorbic acid-2-phosphate to AA, which was then analyzed by OPECT. As a result, the AA-mediated OPECT sensing strategy realized highly sensitive detection of H-FABP with a detection limit of 3.23 x 10(-14) g/mL which is two orders of magnitude lower than that of PEC method. Under optimal experimental conditions, H-FABP concentration could be obtained in ~90 min. Importantly, the analysis of H-FABP was resistant to the interference from immunoglobulin G, bovine serum albumin, cysteine, AA and human serum. The proposed AA-mediated OPECT sensing strategy provides a simple, fast, and accurate way for H-FABP detection in AMI suspected patients.
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