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Anti-Mta associated with three cases of hemolytic disease of the newborn

C C Cheung1, D Challis, G Fisher

  • 1South Eastern Area Laboratory Services-Transfusion Services, Prince of Wales Hospital, Sydney, NSW 2031, Australia.

Immunohematology
|September 18, 2004
PubMed

Insights

This study reports a family with recurrent hemolytic disease of the newborn (HDN) caused by the rare anti-Mta antibody. Despite negative direct antiglobulin tests, anti-Mta was implicated in neonatal anemia in three siblings.

Area of Science:

  • Immunology
  • Hematology
  • Genetics

Background:

  • The Mta antigen is a rare red blood cell (RBC) surface antigen within the MNSs blood group system.
  • Hemolytic disease of the newborn (HDN) due to anti-Mta is exceptionally rare, with only one prior report.

Purpose of the Study:

  • To investigate the cause of recurrent neonatal anemia in a family.
  • To determine the role of the Mta antigen and associated antibodies in HDN.

Main Methods:

  • Serologic investigations including antibody screening and identification.
  • Phenotyping of red blood cells for Mta antigen status.
  • Adsorption and elution experiments to confirm antibody specificity.

Main Results:

  • Three children presented with clinical and hematologic findings consistent with HDN.
  • Direct antiglobulin tests (DAT) on cord RBCs were repeatedly negative.
  • The mother was Mta- and possessed anti-Mta antibodies; the father and children were Mta+.

Conclusions:

  • Anti-Mta antibodies were implicated in recurrent HDN within this family.
  • The study highlights the importance of considering rare antibodies in cases of unexplained neonatal anemia, even with negative DAT.
  • This case expands the understanding of anti-Mta alloimmunization and its clinical significance.

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