title: Altered chemotactic response to CXCL12 in patients carrying GATA2 mutations.
abstract: GATA2 deficiency-formerly described as MonoMAC syndrome; dendritic cells, monocytes, B cells, and natural killer cell deficiency; familial myelodysplastic syndrome/acute myeloid leukemia; or Emberger syndrome-encompasses a range of hematologic and nonhematologic anomalies, mainly characterized by monocytopenia, B lymphopenia, natural killer cell cytopenia, neutropenia, immunodeficiency, and a high risk of developing acute myeloid leukemia. Herein, we present 7 patients with GATA2 deficiency recruited into the French Severe Chronic Neutropenia Registry, which enrolls patients with all kinds of congenital neutropenia. We performed extended immunophenotyping of their whole blood lymphocyte populations, together with the analysis of their chemotactic responses. Lymphopenia was recorded for B and CD4(+) T cells in 6 patients. Although only 3 patients displayed natural killer cell cytopenia, the CD56(bright) natural killer subpopulation was nearly absent in all 7 patients. Natural killer cells from 6 patients showed decreased CXCL12/CXCR4-dependent chemotaxis, whereas other lymphocytes, and most significantly B lymphocytes, displayed enhanced CXCL12-induced chemotaxis compared with healthy volunteers. Surface expression of CXCR4 was significantly diminished in the patients' natural killer cells, although the total expression of the receptor was found to be equivalent to that of natural killer cells from healthy individual controls. Together, these data reveal that GATA2 deficiency is associated with impaired membrane expression and chemotactic dysfunctions of CXCR4. These dysfunctions may contribute to the physiopathology of this deficiency by affecting the normal distribution of lymphocytes and thus potentially affecting the susceptibility of patients to associated infections.
authors.affiliation: UMR996 - Inflammation, Chemokines and Immunopathology, Inserm, Univ Paris-Sud, Université Paris-Saclay, Clamart, France;
authors.forename: Anna
authors.initials: A
authors.lastname: Maciejewski-Duval
authors.affiliation: UMR996 - Inflammation, Chemokines and Immunopathology, Inserm, Univ Paris-Sud, Université Paris-Saclay, Clamart, France;
authors.forename: Floriane
authors.initials: F
authors.lastname: Meuris
authors.affiliation: UMR996 - Inflammation, Chemokines and Immunopathology, Inserm, Univ Paris-Sud, Université Paris-Saclay, Clamart, France;
authors.forename: Alexandre
authors.initials: A
authors.lastname: Bignon
authors.affiliation: US31-UMS3679 -Plateforme PLAIMMO, Institut Paris-Saclay d'Innovation Thérapeutique (IPSIT), INSERM, CNRS, Université Paris-Sud, Université Paris-Saclay, Clamart, France;
authors.forename: Marie-Laure
authors.initials: ML
authors.lastname: Aknin
authors.affiliation: UMR996 - Inflammation, Chemokines and Immunopathology, Inserm, Univ Paris-Sud, Université Paris-Saclay, Clamart, France;
authors.forename: Karl
authors.initials: K
authors.lastname: Balabanian
authors.affiliation: Génétique et Anomalies du Développement, EA4271, Université de Bourgogne, Dijon, France and FHU TRANSLAD, Département de Génétique, CHU Dijon, Dijon, France;
authors.forename: Laurence
authors.initials: L
authors.lastname: Faivre
authors.affiliation: Département d'Hématologie du Centre Hospitalier Universitaire Toulouse Purpan and INSERM, CRCT, IUCT-Oncopole, Toulouse, France;
authors.forename: Marlène
authors.initials: M
authors.lastname: Pasquet
authors.affiliation: Service d'Hématologie Pédiatrique, Assistance Publique, Hôpitaux de Marseille, Hôpital Timone Enfants, Marseille, France;
authors.forename: Vincent
authors.initials: V
authors.lastname: Barlogis
authors.affiliation: Département d'Immunologie Clinique, Hôpital Saint Louis and Université Denis Diderot, Paris, France;
authors.forename: Claire
authors.initials: C
authors.lastname: Fieschi
authors.affiliation: US31-UMS3679 -Plateforme PLAIMMO, Institut Paris-Saclay d'Innovation Thérapeutique (IPSIT), INSERM, CNRS, Université Paris-Sud, Université Paris-Saclay, Clamart, France;
authors.forename: Christine
authors.initials: C
authors.lastname: Bellanné-Chantelot
authors.affiliation: UMR996 - Inflammation, Chemokines and Immunopathology, Inserm, Univ Paris-Sud, Université Paris-Saclay, Clamart, France; UMR996 - Inflammation, Chemokines and Immunopathology, Inserm, Univ Paris-Sud, Université Paris-Saclay, Clamart, France;
authors.forename: Jean
authors.initials: J
authors.lastname: Donadieu
authors.affiliation: UMR996 - Inflammation, Chemokines and Immunopathology, Inserm, Univ Paris-Sud, Université Paris-Saclay, Clamart, France;
authors.forename: Géraldine
authors.initials: G
authors.lastname: Schlecht-Louf
authors.affiliation: UMR996 - Inflammation, Chemokines and Immunopathology, Inserm, Univ Paris-Sud, Université Paris-Saclay, Clamart, France; Viviana.marin-esteban@u-psud.fr francoise.bachelerie@u-psud.fr.
authors.forename: Viviana
authors.initials: V
authors.lastname: Marin-Esteban
authors.affiliation: UMR996 - Inflammation, Chemokines and Immunopathology, Inserm, Univ Paris-Sud, Université Paris-Saclay, Clamart, France; Viviana.marin-esteban@u-psud.fr francoise.bachelerie@u-psud.fr.
authors.forename: Françoise
authors.initials: F
authors.lastname: Bachelerie
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001402:B-Lymphocytes / Q000187:drug effects / Q000276:immunology; D019002:CD56 Antigen / Q000378:metabolism; D002462:Cell Membrane / Q000187:drug effects / Q000378:metabolism; D054377:Chemokine CXCL12 / Q000494:pharmacology*; D002633:Chemotaxis / Q000187:drug effects*; D002648:Child; D005260:Female; D050989:GATA2 Transcription Factor / Q000235:genetics*; D006801:Humans; D007694:Killer Cells, Natural / Q000187:drug effects / Q000276:immunology; D018655:Lymphocyte Count; D008297:Male; D009154:Mutation / Q000235:genetics*; D019718:Receptors, CXCR4 / Q000378:metabolism; D013601:T-Lymphocytes / Q000187:drug effects / Q000276:immunology; D055815:Young Adult
chemical_list: D019002:CD56 Antigen; C515255:CXCL12 protein, human; C527276:CXCR4 protein, human; D054377:Chemokine CXCL12; D050989:GATA2 Transcription Factor; D019718:Receptors, CXCR4
keywords: HPV; NK cells cytopenia; human papillomavirus infection; myelodysplastic syndrome; primary immunodeficiency