[Importance of flow cytometry in the detection of anti-erythrocyte autoantibodies].
Coombs test and flow cytometry have been compared in terms of specificity and sensibility in a population of hospitalized patients, for whom a Coombs test had been required. The Coombs test seems more sensible than flow cytometry to detect red cell-bound IgG. For a given patient and over the time, flow cytometry seems better correlated with the severity of haemolysis if erythrocytes are strongly sensitized by IgG. The results of flow cytometric analysis, in percentage of sensitized erythrocytes, do not allow to define a sensibilization threshold for haemolysis prediction. Flow cytometric analysis would be more sensible than Coombs test in the detection of red cell-bound C3d, but these cases are not associated with autoimmune haemolytic anemia. Direct Coombs test should remain the diagnostic test of autoimmune haemolytic anemia.
Marion
V
V
Laboratoire d'Hématologie, CHU Morvan, Brest.
Vicariot
M
M
Charpentier
M C
MC
Azi
M
M
Le Calvez
G
G
Le Roux
A M
AM
D001323:Autoantibodies / Q000097:blood*; D016022:Case-Control Studies; D003298:Coombs Test; D004912:Erythrocytes / Q000276:immunology*; D005434:Flow Cytometry; D006801:Humans; D012680:Sensitivity and Specificity
D001323:Autoantibodies
Intérêt de la cytométrie en flux dans la détection des auto-anticorps anti-érythrocytaires.