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Warm autoantibodies mimicking alloantibodies: Three cases of autoantibodies with unusual antigenic specificity

Jacobs, Jeremy W ; Binns, Thomas C ; Abels, Elizabeth ; Silva Campos, Juan J ; Elkabbani, Ragaa ; Kress, Anna ; Sostin, Nataliya ; Tormey, Christopher A

American journal of clinical pathology, 2023-12, Vol.160 (6), p.561-565 [Periódico revisado por pares]

US: Oxford University Press

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  • Título:
    Warm autoantibodies mimicking alloantibodies: Three cases of autoantibodies with unusual antigenic specificity
  • Autor: Jacobs, Jeremy W ; Binns, Thomas C ; Abels, Elizabeth ; Silva Campos, Juan J ; Elkabbani, Ragaa ; Kress, Anna ; Sostin, Nataliya ; Tormey, Christopher A
  • É parte de: American journal of clinical pathology, 2023-12, Vol.160 (6), p.561-565
  • Notas: ObjectType-Case Study-2
    SourceType-Scholarly Journals-1
    ObjectType-Feature-4
    content type line 23
    ObjectType-Report-1
    ObjectType-Article-3
  • Descrição: Abstract Objectives We describe 3 cases of red blood cell (RBC) autoantibodies with unusual apparent antigenic specificity and discuss the testing methodology and implications of these findings. Methods All immunohematologic testing, including ABO and RhD typing, antibody detection and identification, RBC antigen phenotyping and genotyping, direct antiglobulin tests, and elution studies were performed using standardized and validated methods and reagents. Results Three patients were found to have autoantibodies, which were originally presumed to be alloantibodies. Case 1 was a 60-year-old man with autoanti-Jka following babesiosis; case 2 was a 79-year-old woman with an autoanti-f; and case 3 was a 28-year-old pregnant woman with an autoanti-S. Cases 1 and 2 required RBC transfusions, which were performed with Jka-negative and f-positive RBC units, respectively. No transfusion reactions were reported, and the hemoglobin responded appropriately in both cases. Conclusions These 3 cases complement the minimal literature regarding warm autoantibodies with unusual antigenic specificity and their potential to mediate clinically significant hemolysis. There are only rare reports of warm autoantibodies with specificity for non-Rh antigens, and prior authors have suggested that autoantibodies with mimicking specificity are usually detected only serologically; in contrast, 2 of the 3 patients herein experienced autoimmune hemolytic anemia.
  • Editor: US: Oxford University Press
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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