Steroid receptor assays: an Italian quality assessment program.
Ann Ist Super Sanita
; 27(3): 523-9, 1991.
Article
em En
| MEDLINE
| ID: mdl-1809075
ABSTRACT
An Italian Committee for the quality assessment of steroid receptor assay was instituted in 1979; the number of laboratories participating in this program increased from 7 in 1979 to 43 in 1989. The Italian program in collaboration with EORTC (European Organization Research and Treatment of Cancer) initiatives, utilizes as working standards lyophilized samples that tolerate prolonged storage at 4 degrees C. The national representatives agreed, according to EORTC, that all laboratories would perform, for measurement of steroid receptors, the dextran coated charcoal (DCC) method using the same concentration of radioactive ligands (3-H-estradiol, 3-H-ORG-2058) and would determine the non-specific binding with the same compounds (diethylstilbestrol and ORG-2058). The computation method is a potential source of interlaboratory variation; the multipoint Scatchard analysis, though difficult to apply for receptor problems, is the most widely used approach at present. The standardized DCC method is the most common and recognized (Food and Drug Administration) procedure for quantifying hormone receptor in human cancer. Since new technologies are being introduced (receptor enzyme immunoassay, EIA), adequate programs of quality assessment are required; in general, it has demonstrated an excellent correlation between radioligand binding assay (DCC) and immunochemical assay (EIA). Other prognostic factors, such as proteins produced by oncogenes and growth factors of the malignant cells have become more important. Some of these factors, as well as estrogen receptor status, seem the major determinants of recurrence after the first treatment.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Controle de Qualidade
/
Neoplasias da Mama
/
Receptores de Progesterona
/
Receptores de Estrogênio
/
Biomarcadores Tumorais
/
Proteínas de Neoplasias
Tipo de estudo:
Guideline
/
Prognostic_studies
Limite:
Humans
País/Região como assunto:
Europa
Idioma:
En
Revista:
Ann Ist Super Sanita
Ano de publicação:
1991
Tipo de documento:
Article