PMVEMA-coated upconverting nanoparticles for upconversion-linked immunoassay of cardiac troponin
Jazyk angličtina Země Nizozemsko Médium print-electronic
Typ dokumentu časopisecké články
PubMed
35395457
DOI
10.1016/j.talanta.2022.123400
PII: S0039-9140(22)00196-5
Knihovny.cz E-zdroje
- Klíčová slova
- Bioconjugation, Cardiac troponin I, Immunoassay, Photon-upconversion nanoparticle, Poly(methyl vinyl ether‐alt‐maleic acid), Upconversion-linked immunosorbent assay,
- MeSH
- imunoanalýza metody MeSH
- limita detekce MeSH
- luminiscence MeSH
- nanočástice * chemie MeSH
- troponin I analýza MeSH
- Publikační typ
- časopisecké články MeSH
- Názvy látek
- troponin I MeSH
Surface engineering of upconverting nanoparticles (UCNPs) is crucial for their bioanalytical applications. Here, an antibody specific to cardiac troponin I (cTnI), an important biomarker for acute myocardial infection, was covalently immobilized on the surface of UCNPs to prepare a label for the detection of cTnI biomarker in an upconversion-linked immunoassay (ULISA). Core-shell UCNPs (NaYF4:Yb,Tm@NaYF4) were first coated with poly(methyl vinyl ether-alt-maleic acid) (PMVEMA) and then conjugated to antibodies. The morphology (size and uniformity), hydrodynamic diameter, chemical composition, and amount of coating on the of UCNPs, as well as their upconversion luminescence, colloidal stability, and leaching of Y3+ ions into the surrounding media, were determined. The developed ULISA allowed reaching a limit of detection (LOD) of 0.13 ng/ml and 0.25 ng/ml of cTnI in plasma and serum, respectively, which represents 12- and 2-fold improvement to conventional enzyme-linked immunosorbent based on the same immunoreagents.
Citace poskytuje Crossref.org
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