Specific quantification of heparin-dependent antibodies for the diagnosis of heparin-associated thrombocytopenia using an enzyme-linked immunosorbent assay.
Thromb Res
; 62(5): 377-87, 1991 Jun 01.
Article
en En
| MEDLINE
| ID: mdl-1896958
ABSTRACT
In order to specifically detect heparin-dependent antibodies in patients with suspected heparin-associated thrombocytopenia (HAT), an adapted ELISA test was developed. Serum-platelet bindable IgG (SPb-IgG) were measured in the absence and in the presence of heparin in the sera from a/ 25 normal controls, 25 patients treated by heparin without thrombocytopenia, 29 thrombocytopenic patients not receiving heparin and b/ 12 patients with confirmed HAT. In the absence of heparin, the 12 HAT sera showed normal or elevated SPb-IgG levels (range = 10.4-36 Arbitrary Units or AU) as compared to healthy controls (8-17.1 AU). After coincubation of HAT sera with heparin (0.25, 0.50, 0.75, and 1 IU/ml), SPb-IgG levels were consistently elevated (range = 22.8-150 AU), and this increase in IgG binding (equal in mean to 200%) was always inhibited with 5 IU/ml of heparin. In contrast, a mean maximum increase in SPblgG levels of only 20% was registered in all control groups whatever the tested heparin concentration. Thus, this ELISA allows the specific diagnosis of HAT by demonstrating a serum IgG binding on platelets only in the presence of therapeutic concentrations of heparin.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Trombocitopenia
/
Ensayo de Inmunoadsorción Enzimática
/
Heparina
/
Anticuerpos
Tipo de estudio:
Diagnostic_studies
/
Etiology_studies
/
Evaluation_studies
/
Risk_factors_studies
Límite:
Aged
/
Aged80
/
Female
/
Humans
/
Male
Idioma:
En
Revista:
Thromb Res
Año:
1991
Tipo del documento:
Article
País de afiliación:
Francia