An improved micromethod for the determination of biochemically active estrogen and progesterone receptors in parallel to comparative histological examination of a single piece of tissue.
J Steroid Biochem
; 31(6): 899-907, 1988 Dec.
Article
en En
| MEDLINE
| ID: mdl-3199826
An improved radioreceptor assay of unfixed cryostat sections of human target tissues has been developed. Sections collected on glass coverslips were immediately incubated with 5 nM concentrations of either tritiated estradiol-17 beta for estrogen receptor (ER) or ORG 2058 for progesterone receptor (PR) determination. For quantitation, receptor-bound and free hormone were separated by isoelectric focusing (IEF). The assay allows the determination of steroid hormone receptors and comparative histological examinations in immediately neighbouring serial sections of a single piece of tissue. Biochemically, the validity of the assay procedure was evidenced by Scatchard analysis, by ligand and tissue specificities, by the linear relations of receptor and protein concentrations and the number of sections per test tube. Diagnostically, we compared the routine (6 point DCC-Scatchard) procedure for breast cancer analysis with the section method. A good correlation for ER and a less pronounced correlation for PR was found. Statistically, the precision of the method was verified by low deviations of duplicate determinations, low day-to-day variations and low inter-assay variations.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Receptores de Progesterona
/
Receptores de Estrógenos
Límite:
Female
/
Humans
Idioma:
En
Revista:
J Steroid Biochem
Año:
1988
Tipo del documento:
Article
Pais de publicación:
Reino Unido