title: Expression and functional role of HLA-G in immune cells from patients with systemic lupus erythematosus.
abstract: Human leukocyte antigen (HLA)-G is a class I non-classical HLA molecule with an important regulatory role on the immune response. The possible role of this molecule in the pathogenesis of SLE has not been explored. In this work, we evaluated the expression and function of HLA-G in SLE patients. We studied 37 SLE patients as well as 25 healthy donors. Peripheral blood monocytes and in vitro-generated dendritic cells (DCs) were analyzed for HLA-G expression by flow cytometry. We found that monocytes from SLE patients as well as mature CD83+ DCs showed a diminished expression of HLA-G compared with healthy controls. In addition, monocytes from SLE patients showed a diminished induction of HLA-G expression in response to stimulation with IL-10. Furthermore, functional assays showed that these monocytes pre-treated with IFN-γ exhibited a diminished capability to inhibit the proliferation of autologous lymphocytes. Finally, lymphocytes from SLE patients tended to display a lower acquisition of HLA-G (by trogocytosis) from autologous monocytes compared to controls. Our results might have implications for the immune abnormalities observed in patients with SLE.
authors.affiliation: Departamento de Inmunología, Facultad de Medicina, UASLP, Ave. V. Carranza 2405, 78210, San Luis Potosí, SLP, Mexico.
authors.forename: Adriana Elizabeth
authors.initials: AE
authors.lastname: Monsiváis-Urenda
authors.forename: Lourdes
authors.initials: L
authors.lastname: Baranda
authors.forename: Crisol
authors.initials: C
authors.lastname: Alvarez-Quiroga
authors.forename: Carlos
authors.initials: C
authors.lastname: Abud-Mendoza
authors.forename: Roberto
authors.initials: R
authors.lastname: González-Amaro
mesh_terms: D000328:Adult; D015703:Antigens, CD / Q000032:analysis / Q000276:immunology; D016022:Case-Control Studies; D002454:Cell Differentiation / Q000187:drug effects; D049109:Cell Proliferation / Q000187:drug effects; D003713:Dendritic Cells / Q000276:immunology / Q000378:metabolism* / Q000473:pathology; D005434:Flow Cytometry; D015870:Gene Expression / Q000276:immunology*; D016178:Granulocyte-Macrophage Colony-Stimulating Factor / Q000276:immunology / Q000494:pharmacology; D059951:HLA-G Antigens / Q000235:genetics / Q000276:immunology / Q000378:metabolism; D006801:Humans; D007136:Immunoglobulins / Q000032:analysis / Q000276:immunology; D066298:In Vitro Techniques; D007371:Interferon-gamma / Q000097:blood / Q000276:immunology / Q000494:pharmacology; D016753:Interleukin-10 / Q000097:blood / Q000276:immunology / Q000494:pharmacology; D008180:Lupus Erythematosus, Systemic / Q000097:blood / Q000235:genetics / Q000276:immunology* / Q000473:pathology; D008213:Lymphocyte Activation; D008214:Lymphocytes / Q000276:immunology / Q000378:metabolism* / Q000473:pathology; D008562:Membrane Glycoproteins / Q000032:analysis / Q000276:immunology; D009000:Monocytes / Q000276:immunology / Q000378:metabolism* / Q000473:pathology; D014409:Tumor Necrosis Factor-alpha / Q000235:genetics / Q000378:metabolism; D000097802:CD83 Antigen
chemical_list: D015703:Antigens, CD; D016178:Granulocyte-Macrophage Colony-Stimulating Factor; D059951:HLA-G Antigens; D007136:Immunoglobulins; D007371:Interferon-gamma; D016753:Interleukin-10; D008562:Membrane Glycoproteins; D014409:Tumor Necrosis Factor-alpha; D000097802:CD83 Antigen