title: [The immunology of psoriasis].
abstract: In recent years, numerous studies have reported the existence of multiple immune disturbances in psoriasis. Estimation of serum immunoglobulins shows an increase in IgA and a possible decrease in IgM. The percentage of psoriatic patients with an increased IgE (450 I.U./ml) is increased in comparison with the normal population. IgA levels in salivary secretions are markedly increased. There are anti-IgG antibodies as well as anti-IgG activity on circulating lymphocytes in 45 p. 100 of psoriasis sufferers. This anti-IgG activity has also been described by certain authors in the psoriatic epidermis. More recently, the abnormal presence of anti-stratum corneum auto-antibodies fixed on the corneal layer has been noted. Cell immunity explored by intra-dermal tests and by the DCNB test is little disturbed. However, certain studies have shown a dissociated deficiency in circulating T-lymphocytes. Finally, it is now well established that BW17, B13 and BW38 histocompatibility antigens are found with a high degree of frequency in psoriasis. The role of these immunological disturbances in psoriatic disease remains to be defined.
mesh_terms: D000888:Antibodies, Anti-Idiotypic / Q000032:analysis; D000936:Antigen-Antibody Complex; D001323:Autoantibodies; D000939:Epitopes; D006680:HLA Antigens / Q000032:analysis; D006801:Humans; D007111:Immunity, Cellular; D007070:Immunoglobulin A / Q000032:analysis; D007071:Immunoglobulin A, Secretory / Q000032:analysis; D007073:Immunoglobulin E / Q000032:analysis; D007074:Immunoglobulin G / Q000032:analysis; D007136:Immunoglobulins / Q000032:analysis; D007365:Intercellular Junctions; D011565:Psoriasis / Q000150:complications / Q000276:immunology*; D012216:Rheumatic Diseases / Q000209:etiology; D012463:Saliva / Q000276:immunology; D012867:Skin / Q000276:immunology
chemical_list: D000888:Antibodies, Anti-Idiotypic; D000936:Antigen-Antibody Complex; D001323:Autoantibodies; D000939:Epitopes; D006680:HLA Antigens; D007070:Immunoglobulin A; D007071:Immunoglobulin A, Secretory; D007074:Immunoglobulin G; D007136:Immunoglobulins; D007073:Immunoglobulin E
vernacular_title: Immunologie du psoriasis