Aptamer-based sensing of ß-casomorphin-7.
J Agric Food Chem
; 63(10): 2647-53, 2015 Mar 18.
Article
en En
| MEDLINE
| ID: mdl-25712869
ABSTRACT
ß-Casomorphin-7 (BCM-7), a seven amino acid peptide, is released during digestion of ß-casein A1 variant of milk which is speculated to be associated with certain diseases. Fifteen ssDNA aptamers having high affinity toward BCM-7 were identified from a 72 nt long random library after ten rounds of systematic evolution of ligands by exponential enrichment. Dissociation constant values of selected aptamers were in the range of 7.7-156.7 nM. Seq6 aptamer exhibited the lowest Kd value. Nine aptamers were evaluated for their binding toward BCM-7, BCM-9A1, and BCM-9A2 peptides, and binding was variable. SeqU5 exhibited the lowest binding with BCM-9A1 and BCM-9A2. Aptamer-coated gold nanoparticles (GNPs) resulted in color change of GNPs in the presence of BCM-7, thereby establishing recognition of BCM-7 by aptamers. The enzyme-linked aptamer-sorbent assay (ELASA) was evaluated as an assay of BCM-7 in biological fluids. BCM-7-peroxidase competed with BCM-7 in ELASA, performed with BCM-7 solution and BCM-7 spiked urine pretreated with urease, plasma, and ß-casein digest samples.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Endorfinas
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Técnicas Biosensibles
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Aptámeros de Nucleótidos
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Técnica SELEX de Producción de Aptámeros
Tipo de estudio:
Evaluation_studies
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Prognostic_studies
Límite:
Animals
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Humans
Idioma:
En
Revista:
J Agric Food Chem
Año:
2015
Tipo del documento:
Article
País de afiliación:
India
Pais de publicación:
EEUU
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ESTADOS UNIDOS
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ESTADOS UNIDOS DA AMERICA
/
EUA
/
UNITED STATES
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UNITED STATES OF AMERICA
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US
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USA