Direct Coombs test-negative autoimmune hemolytic anemia and low-affinity IgG class antibodies
نویسندگان
چکیده
منابع مشابه
Direct antiglobulin ("Coombs") test-negative autoimmune hemolytic anemia: a review.
We have reviewed the literature to identify and characterize reports of warm-antibody type, autoimmune hemolytic anemia in which the standard direct antiglobulin reaction was negative but a confirmatory test indicated that the red cells were opsonized with antibody. Three principal reasons account for the absence of a positive direct antiglobulin test in these cases: a) IgG sensitization below ...
متن کاملCoombs-Negative Autoimmune Hemolytic Anemia in Crohn’s Disease
BACKGROUND Anemia is a common, important extraintestinal complication of Crohn's disease. The main types of anemia in patients with Crohn's disease are iron deficiency anemia and anemia of chronic disease. Although patients with Crohn's disease may experience various type of anemia, autoimmune hemolytic anemia (AIHA) in patients with Crohn's disease, especially Coombs-negative AIHA, is very rar...
متن کاملHemolytic anemia with cold detectable IgG antibodies.
Erythrocytes obtained from patients who manifest autoimmune hemolytic anemia can be divided into at least three categories by the nature of their protein coats as determined by direct antiglobulin (Coombs) test: IgG alone, IgG and complement (C), C alone. IgG antibodies were detected by direct Coombs Test at 4#{176}Cbut not at 37#{176}Cin patients of type 3 A.H.A. Experiments at 4, 10, 15, 20, ...
متن کاملDevelopment of flow cytometry for detection and quantitation of red cell bound immunoglobulin G in autoimmune hemolytic anemia with negative direct Coombs test.
About 2-10% of patients with warm-antibody autoimmune hemolytic anemia (WAIHA) exhibit a negative direct Coombs test (DAT), requiring more sensitive tests, including detection of RBC-bound immunoglobulins by flow cytometry, for diagnosis. In this study, the optimal conditions for detection and quantitation of RBC-bound IgG by flow cytometry were studied using blood samples from six patients wit...
متن کاملAnemia with positive direct Coombs' test induced by trypan blue.
as evidence of autoimmune phenomena. The experimental production of positive antiglobulin tests by drugs and chemical agents, however, has suggested that nonimmunologic mechanisms may also be responsible for protein coating of erythrocytes.2’3 During attempts to produce tumors of the reticuloendothelial system in rats by injection of trypan blue, an anemia, chacacterized by increased ervthrocyt...
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ژورنال
عنوان ژورنال: Immunohematology
سال: 2020
ISSN: 0894-203X,1930-3955
DOI: 10.21307/immunohematology-2019-725