{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,25]],"date-time":"2026-08-25T12:58:01Z","timestamp":1787662681802,"version":"build-2736575974"},"reference-count":18,"publisher":"American Society of Hematology","issue":"2","content-domain":{"domain":["ashpublications.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2025,7,10]]},"abstract":"<jats:sec>\n                  <jats:title>Abstract<\/jats:title>\n                  <jats:p>The Csa blood group antigen was identified &amp;gt;50 years ago, but its genetic basis has yet to be elucidated. All our recent genomic investigation has failed to resolve the genetic basis of this enigmatic antigen. By investigating the association of the human neutrophil antigen (HNA)-3a\/b polymorphism (rs2288904-G\/A) in SLC44A2 with clinical features of sickle cell disease, we incidentally discovered that rare subjects with the homozygous HNA-3b\/b genotype also carry the uncommon Cs(a\u2013) phenotype. We genotyped this single-nucleotide polymorphism in a cohort of 25 Cs(a\u2013) subjects and found that all of them showed an HNA-3b\/b genotype. This result suggests that the high-prevalence allele with rs2288904 (HNA-3a; 455G) encoding Arg152 encodes the high-prevalence Csa. Accordingly, anti-Csa does not react with solute carrier (SLC)44A2null red blood cells (RBCs), SLC44A2 knockout K562 cells, and K562 cells expressing HNA-3b, confirming that the Csa and Csb antigens are carried on this protein. Furthermore, mass spectrometry analysis of SLC44A2 from neutrophils and RBCs, along with serological investigation, showed that, despite HNA-3a and Csa having the same genetic basis, anti\u2013HNA-3a and anti-Csa recognize different epitopes on the SLC44A2 protein. Overall, our data resolve the genetic bases of the Cs(a\u2013) and Cs(b\u2013) blood phenotypes, with new insights on the anti\u2013HNA-3a specificity.<\/jats:p>\n               <\/jats:sec>","DOI":"10.1182\/blood.2024026285","type":"journal-article","created":{"date-parts":[[2025,3,16]],"date-time":"2025-03-16T16:54:56Z","timestamp":1742144096000},"page":"247-253","update-policy":"https:\/\/doi.org\/10.1182\/blood.2019cm0000","source":"Crossref","is-referenced-by-count":4,"title":["The neutrophil antigen 3a\/b polymorphism in <i>SLC44A2<\/i> unexpectedly encodes the Csa\/Csb red cell antigens"],"prefix":"10.1182","volume":"146","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5785-0685","authenticated-orcid":false,"given":"Romain","family":"Duval","sequence":"first","affiliation":[{"name":"1Universit\u00e9 Paris Cit\u00e9 and Universit\u00e9 des Antilles, INSERM, Unit\u00e9 Mixte de Recherche (UMR)-S1134, Laboratory of Blood Group Antigens, Hematopoiesis and Sickle Cell Disease, Paris, France"},{"name":"2Centre National de R\u00e9f\u00e9rence pour les Groupes Sanguins, \u00c9tablissement Fran\u00e7ais du Sang Ile-de-France, Paris, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0008-8261-989X","authenticated-orcid":false,"given":"Alissa","family":"Soudry","sequence":"additional","affiliation":[{"name":"1Universit\u00e9 Paris Cit\u00e9 and Universit\u00e9 des Antilles, INSERM, Unit\u00e9 Mixte de Recherche (UMR)-S1134, Laboratory of Blood Group Antigens, Hematopoiesis and Sickle Cell Disease, Paris, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1679-7478","authenticated-orcid":false,"given":"Jonathan","family":"De Oliveira Rios","sequence":"additional","affiliation":[{"name":"1Universit\u00e9 Paris Cit\u00e9 and Universit\u00e9 des Antilles, INSERM, Unit\u00e9 Mixte de Recherche (UMR)-S1134, Laboratory of Blood Group Antigens, Hematopoiesis and Sickle Cell Disease, Paris, France"},{"name":"3Laboratory of Hemoglobins and Genetics of Hematologic Diseases, S\u00e3o Paulo State University, S\u00e3o Paulo, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2547-3723","authenticated-orcid":false,"given":"Sarah Liane","family":"Linguet","sequence":"additional","affiliation":[{"name":"1Universit\u00e9 Paris Cit\u00e9 and Universit\u00e9 des Antilles, INSERM, Unit\u00e9 Mixte de Recherche (UMR)-S1134, Laboratory of Blood Group Antigens, Hematopoiesis and Sickle Cell Disease, Paris, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Miguel","family":"Taillepierre","sequence":"additional","affiliation":[{"name":"1Universit\u00e9 Paris Cit\u00e9 and Universit\u00e9 des Antilles, INSERM, Unit\u00e9 Mixte de Recherche (UMR)-S1134, Laboratory of Blood Group Antigens, Hematopoiesis and Sickle Cell Disease, Paris, France"},{"name":"4\u00c9tablissement Fran\u00e7ais du Sang, Guadeloupe, Pointe-\u00e0-Pitre, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Graziella","family":"Matesic","sequence":"additional","affiliation":[{"name":"1Universit\u00e9 Paris Cit\u00e9 and Universit\u00e9 des Antilles, INSERM, Unit\u00e9 Mixte de Recherche (UMR)-S1134, Laboratory of Blood Group Antigens, Hematopoiesis and Sickle Cell Disease, Paris, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alexandre","family":"Raneri","sequence":"additional","affiliation":[{"name":"2Centre National de R\u00e9f\u00e9rence pour les Groupes Sanguins, \u00c9tablissement Fran\u00e7ais du Sang Ile-de-France, Paris, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Guy","family":"Laiguillon","sequence":"additional","affiliation":[{"name":"2Centre National de R\u00e9f\u00e9rence pour les Groupes Sanguins, \u00c9tablissement Fran\u00e7ais du Sang Ile-de-France, Paris, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Emilie","family":"Le Toriellec","sequence":"additional","affiliation":[{"name":"5Laboratoire Human Leukocyte Antigen, D\u00e9partement d'Immunologie Leucoplaquettaire, \u00c9tablissement Fran\u00e7ais du Sang Ile-de-France, Cr\u00e9teil, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Emilie-Fleur","family":"Gautier","sequence":"additional","affiliation":[{"name":"6Universit\u00e9 Paris Cit\u00e9, UMR_S1016, UMR 8104, Plateforme de Prot\u00e9omique (3P5), Institut Cochin, Paris, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Damien","family":"Vainqueur","sequence":"additional","affiliation":[{"name":"1Universit\u00e9 Paris Cit\u00e9 and Universit\u00e9 des Antilles, INSERM, Unit\u00e9 Mixte de Recherche (UMR)-S1134, Laboratory of Blood Group Antigens, Hematopoiesis and Sickle Cell Disease, Paris, France"},{"name":"4\u00c9tablissement Fran\u00e7ais du Sang, 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