A LU:-16 individual with antibodies

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Immunohematology

American National Red Cross

Subject: Medical Laboratory Technology

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ISSN: 0894-203X
eISSN: 1930-3955

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VOLUME 33 , ISSUE 3 (September 2017) > List of articles

A LU:-16 individual with antibodies

Carole Éthier / Cynthia Parent / Anne-Sophie Lemay / Nadia Baillargeon / Geneviève Laflamme / Josée Lavoie / Josée Perreault / Maryse St-Louis *

Keywords : Lutheran, high-prevalence antigen, African, pregnancy

Citation Information : Immunohematology. Volume 33, Issue 3, Pages 110-113, DOI: https://doi.org/10.21307/immunohematology-2019-016

License : (Transfer of Copyright)

Published Online: 09-October-2019

ARTICLE

ABSTRACT

Antibodies against Lutheran blood group antigens have been observed during first-time pregnancy. Samples from a woman of African descent were tested in our immunohematology laboratory on several occasions since 2001. Her samples were phenotyped as Lu(a+b−), and anti-Lub was suspected but not identified. She was asked to make autologous donations in preparation for her delivery, which she did. In 2010, two antibodies were identified: anti-Lea and -Lub. Six years later, a third investigation was requested. This time, an antibody directed at a high-prevalence Lutheran antigen was found in addition to the anti-Lea and -Lub previously observed. Her serum was compatible with three out of five Lu(a−b−) reagent red blood cells (RBCs). One of the incompatible Lu(a−b−) reagent RBCs was known to be In(Lu) (KLF1 mutation). The genetic background of the other reagent RBC was unknown. The LU cDNA sequence analysis revealed the presence of the c.230G>A (Lua), c.679C>T (LU:–16), and a silent polymorphism c.1227G>T. Anti-Lu16 was highly suspected. This would be the fifth case of LU:–16 with antibodies reported, all within women of African heritage with the Lu(a+b−) phenotype. Hemolytic disease of the fetus and newborn was not noted in these cases.

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