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Multicenter study on differential human neutrophil antigen 2 expression and underlying molecular mechanisms

Background: The human neutrophil antigen 2 (HNA-2), which is expressed on CD177, is undetectable in 3-5% of the normal population. Exposure of these HNA-2null individuals to HNA-2-positive cells can cause immunization and pro-duction of HNA-2 antibodies, which can induce immune neutropenia and trans...

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Hauptverfasser: Flesch, Brigitte (VerfasserIn) , Reil, Angelika (VerfasserIn) , Nogués, Núria (VerfasserIn) , Canals, Carme (VerfasserIn) , Bugert, Peter (VerfasserIn) , Schulze, Torsten (VerfasserIn) , Huiskes, Elly (VerfasserIn) , Porcelijn, Leendert (VerfasserIn) , Höglund, Petter (VerfasserIn) , Ratcliffe, Paul (VerfasserIn) , Schönbacher, Marlies (VerfasserIn) , Kerchrom, Hans (VerfasserIn) , Kellershohn, Josina (VerfasserIn) , Bayat, Behnaz (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: October 2020
In: Transfusion medicine and hemotherapy
Year: 2020, Jahrgang: 47, Heft: 5, Pages: 385-395
ISSN:1660-3818
DOI:10.1159/000505523
Online-Zugang:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1159/000505523
Verlag, lizenzpflichtig, Volltext: https://karger.com/tmh/article/47/5/385/301659/Multicenter-Study-on-Differential-Human-Neutrophil
Volltext
Verfasserangaben:Brigitte K. Flesch, Angelika Reil, Núria Nogués, Carme Canals, Peter Bugert, Torsten J. Schulze, Elly Huiskes, Leendert Porcelijn, Petter Höglund, Paul Ratcliffe, Marlies Schönbacher, Hans Kerchrom, Josina Kellershohn, Behnaz Bayat
Beschreibung
Zusammenfassung:Background: The human neutrophil antigen 2 (HNA-2), which is expressed on CD177, is undetectable in 3-5% of the normal population. Exposure of these HNA-2null individuals to HNA-2-positive cells can cause immunization and pro-duction of HNA-2 antibodies, which can induce immune neutropenia and transfusion-related acute lung injury. In HNA-2-positive individuals, neutrophils are divided into a CD177pos. and a CD177neg. subpopulation. The molecular background of HNA-2 deficiency and the bimodal expression pattern, however, are not completely decoded. Study Design: An international collaboration was conducted on the genetic analysis of HNA-2-phenotyped blood samples, including HNA-2-deficient individuals, mothers, and the respective children with neonatal immune neutropenia and regular blood donors. Results: From a total of 54 HNA-2null individuals, 43 were homozygous for the CD177*787A>T substitution. Six carried the CD177*c.1291G>A single nucleotide polymorphism. All HNA-2-positive samples with >40% CD177pos. neutrophils carried the *787A wild-type allele, whereas a lower rate of CD177pos. neutrophils was preferentially associated with *c.787AT heterozygosity. Interestingly, only the *c.787A allele sequence was detected in complementary DNA (cDNA) sequence analysis carried out on all *c.787AT heterozygous individuals. However, cDNA analysis after sorting of CD177pos. and CD177neg. neutrophil subsets from HNA-2-positive individuals showed identical sequences, which makes regulatory elements within the promoter unlikely to affect CD177 gene transcription in different CD177 neutrophil subsets. Conclusion: This comprehensive study clearly demonstrates the impact of single nucleotide polymorphisms on the expression of HNA-2 on the neutrophil surface but challenges the hypothesis of regulatory epigenetic effects being implicated in the bimodal CD177 expression pattern.
Beschreibung:Online publiziert: 22. Januar 2020
Gesehen am 05.08.2025
Beschreibung:Online Resource
ISSN:1660-3818
DOI:10.1159/000505523

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