A new specific and sensitive time resolved-fluoroimmunoassay of 11-deoxycortisol in serum.
J Steroid Biochem Mol Biol
; 77(2-3): 143-50, 2001 May.
Article
em En
| MEDLINE
| ID: mdl-11377980
ABSTRACT
A biotinylated 11-deoxycortisol tracer was synthesized from 11-deoxycortisol-3-carboxymethyloxime and the conjugate obtained by acylation of biotinylaminopropylammonium trifluoroacetate. This biotinylated tracer was used to develop an 11-deoxycortisol time-resolved-fluoroimmunoassay (TR-FIA). The tracer was quantified after adding streptavidine-Europium. A TR-FIA sensitive standard curve, with displacement of 20, 50, and 80% of tracer was obtained with 12.4, 70.7, and 512.8 pg of 11-deoxycortisol, respectively. After extraction followed by Celite chromatography, purified serum samples were simultaneously assayed by RIA and TR-FIA. The results obtained by the two methods were practically identical, however, this new specific, non-isotopic 11-deoxycortisol assay has the advantage of being more sensitive than RIA, thus well-suited to accurate measurement in endocrinological studies, particularly when serum 11-deoxycortisol levels in patients are just above the highest normal values. Moreover, this non-isotopic assay is cheaper than RIA.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Cortodoxona
Tipo de estudo:
Diagnostic_studies
Limite:
Humans
Idioma:
En
Revista:
J Steroid Biochem Mol Biol
Assunto da revista:
BIOLOGIA MOLECULAR
/
BIOQUIMICA
Ano de publicação:
2001
Tipo de documento:
Article
País de afiliação:
França