Hemin-incorporated nanoflowers as enzyme mimics for colorimetric detection of foodborne pathogenic bacteria.
Bioorg Med Chem Lett
; 28(23-24): 3802-3807, 2018 12 15.
Article
em En
| MEDLINE
| ID: mdl-30392778
ABSTRACT
Rapid, sensitive and point-of-care detection of foodborne pathogenic bacteria is essential for food safety. In this study, we found that hemin-concanavalin A hybrid nanoflowers (HCH nanoflowers), as solid mimic peroxidase, could catalyze oxidation of 2,2'-azino-bis (3-ethylbenzthiazoline-6-sulfonic acid) diammonium salt (ABTS) in the presence of H2O2 to a green-colored product. HCH nanoflowers, integrating the essential functions of both biological recognition and signal amplification, meet the requirements of signal labels for colorimetric immunoassay of bacteria. In view of the excellent peroxidase mimetic catalytic activity of HCH nanoflowers, a colorimetric biosensing platform was newly constructed and applied for sensitive detection of foodborne Escherichia coli O157H7 (E. coli O157H7). The corresponding detection limits was as low as 4.1â¯CFU/mL with wide linear ranges (101-106â¯CFU/mL).
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Técnicas Biossensoriais
/
Colorimetria
/
Escherichia coli O157
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Materiais Biomiméticos
/
Nanoestruturas
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Infecções por Escherichia coli
/
Hemina
Tipo de estudo:
Diagnostic_studies
/
Evaluation_studies
Limite:
Animals
/
Humans
Idioma:
En
Revista:
Bioorg Med Chem Lett
Assunto da revista:
BIOQUIMICA
/
QUIMICA
Ano de publicação:
2018
Tipo de documento:
Article
País de afiliação:
China