title: [X-linked lymphoproliferative syndrome, EBV virus infection and defects in cytotoxicity lymphocyte regulation].
abstract: Mutations in SH2D1A, a gene that codifies for the regulatory protein SAP, result in uncontrolled activation of the SLAM (signaling lymphocyte-activation molecule) pathway. This X-linked immunodeficiency becomes evident when the patients are infected with Epstein Barr virus (EBV) and develop a fulminant form of infectious mononucleosis leading to a lymphoproliferative syndrome that is often fatal (X-linked lymphoproliferative syndrome, XLP). In those who survive, hypogammaglobulinemia and oncohematologic diseases are frequently observed. In this revision, the immuno-regulatory mechanisms involved in XLP immunopathology and the role of different effector cells (CD8 T lymphocytes, NK cells) are discussed.
authors.affiliation: Hospital Británico, Buenos Aires.
authors.forename: Alejandro
authors.initials: A
authors.lastname: Malbrán
authors.forename: Liliana
authors.initials: L
authors.lastname: Belmonte
authors.forename: Beatriz
authors.initials: B
authors.lastname: Ruibal-Ares
authors.forename: Patricia
authors.initials: P
authors.lastname: Baré
authors.forename: María Marta E
authors.initials: MM
authors.lastname: Bracco
mesh_terms: D015703:Antigens, CD; D002352:Carrier Proteins / Q000235:genetics*; D003602:Cytotoxicity, Immunologic; D020031:Epstein-Barr Virus Infections / Q000235:genetics* / Q000276:immunology; D006023:Glycoproteins / Q000235:genetics*; D004854:Herpesvirus 4, Human / Q000276:immunology; D006801:Humans; D007136:Immunoglobulins / Q000235:genetics*; D047908:Intracellular Signaling Peptides and Proteins; D007694:Killer Cells, Natural / Q000276:immunology; D008232:Lymphoproliferative Disorders / Q000235:genetics* / Q000276:immunology; D011956:Receptors, Cell Surface; D000071179:Signaling Lymphocytic Activation Molecule Associated Protein; D000071177:Signaling Lymphocytic Activation Molecule Family Member 1; D013602:T-Lymphocytes, Cytotoxic / Q000276:immunology*
chemical_list: D015703:Antigens, CD; D002352:Carrier Proteins; D006023:Glycoproteins; D007136:Immunoglobulins; D047908:Intracellular Signaling Peptides and Proteins; D011956:Receptors, Cell Surface; C114953:SH2D1A protein, human; D000071179:Signaling Lymphocytic Activation Molecule Associated Protein; D000071177:Signaling Lymphocytic Activation Molecule Family Member 1