title: A switched catalysis qualified sealers capped one-step synthesis biocompatibility bimetallic scaffold film for Neu5Acα(2-6)Gal β MP Glycoside specific detection.
abstract: In this work, a novel label-free biosensor was designed for the sensitive and selective determination of Neu5Acα(2-6)Gal β MP Glycoside using AuPt-PPy(polypyrrole) conductive nanocomposite film as the sensor platform. The introduced AuPt-PPy nanocomposite provided a large surface area for the immobilization of Sambucus nigra agglutinis (SNA) through a coupling agent for specifically recognizing analytes and exhibited high electrocatalytic activity toward the reduction of hydrogen peroxide (H2O2) as an analytical signal. Subsequently, to block the non-specific sites of the modified electrode, GOx was employed instead of the usual sealers. Most importantly, in the presence of glucose, these localized GOx further enhanced the electrochemical signal, which was achieved by the efficient catalysis of glucose. This study is the first that demonstrates the specific detection of Neu5Acα(2-6)Gal β MP Glycoside using AuPt-PPy as the electrocatalytic. Under optimal conditions, the electrochemical biosensor exhibited a wide linear range of 0.01 pgmL(-1)-800 ngmL(-1) with a low detection limit of 0.003 pgmL(-1) (S/N=3), due to the affinity between SNA and Neu5Acα(2-6)Gal β MP Glycoside. Therefore, the co-catalysis signal amplification approach has considerable potential in clinical applications and is suitable for the quantification of other biomarkers.
authors.affiliation: Institute of Life Science and School of Public Health, Chongqing Medical University, Box 174#, No. 1 Yixueyuan Road, Chongqing 400016, PR China.
authors.forename: Chunyong
authors.initials: C
authors.lastname: Xia
authors.affiliation: Institute of Life Science and School of Public Health, Chongqing Medical University, Box 174#, No. 1 Yixueyuan Road, Chongqing 400016, PR China.
authors.forename: Junlin
authors.initials: J
authors.lastname: He
authors.affiliation: Institute of Life Science and School of Public Health, Chongqing Medical University, Box 174#, No. 1 Yixueyuan Road, Chongqing 400016, PR China.
authors.forename: Guolin
authors.initials: G
authors.lastname: Yuan
authors.affiliation: Institute of Life Science and School of Public Health, Chongqing Medical University, Box 174#, No. 1 Yixueyuan Road, Chongqing 400016, PR China.
authors.forename: Yuliang
authors.initials: Y
authors.lastname: Li
authors.affiliation: Institute of Life Science and School of Public Health, Chongqing Medical University, Box 174#, No. 1 Yixueyuan Road, Chongqing 400016, PR China.
authors.forename: Qingying
authors.initials: Q
authors.lastname: Li
authors.affiliation: Institute of Life Science and School of Public Health, Chongqing Medical University, Box 174#, No. 1 Yixueyuan Road, Chongqing 400016, PR China. Electronic address: yuchaom@163.com.
authors.forename: Chao
authors.initials: C
authors.lastname: Yu
mesh_terms: D001672:Biocompatible Materials / Q000737:chemistry; D002384:Catalysis; D003217:Conductometry / Q000295:instrumentation*; D004187:Disaccharides / Q000032:analysis* / Q000737:chemistry; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006046:Gold / Q000737:chemistry; D053768:Metal Nanoparticles / Q000737:chemistry*; D037121:Plant Lectins / Q000737:chemistry*; D010984:Platinum / Q000737:chemistry; D011108:Polymers / Q000737:chemistry*; D011758:Pyrroles / Q000737:chemistry*; D015203:Reproducibility of Results; D027924:Sambucus nigra / Q000378:metabolism*; D012680:Sensitivity and Specificity
chemical_list: D001672:Biocompatible Materials; D004187:Disaccharides; D037121:Plant Lectins; D011108:Polymers; D011758:Pyrroles; C067635:polypyrrole; C063866:N-acetylneuraminyl-(2-6)-galactose; D010984:Platinum; D006046:Gold
keywords: AuPt–PPy; Electrochemical catalytic; Glucose oxide; Neu5Acα(2-6)Gal β MP Glycoside