title: [Physiopathology of rheumatoid psoriasis].
abstract: The physiopathology of rhumatoid psoriasis (RP) is poorly known. Besides the genetic factors we study immunological disorders from a series of 51 cases. We found mainly an increase of serum IgA, a decrease of IgM, a low level of circulating immune complexes, sometimes IgG type antiglobulin factor (very seldom IgM type, which explains the sero-negativity) seldom antinuclear antibodies; we found also a diminution of T lymphocytes detected by a decrease of E rosette - forming cells and an increase of the lymphocyte subpopulation forming high avidity EA rosettes, whereas the mitogenic response is normal or slightly decreased in the presence of Con A (not significant). A increased frequency of HLA DRW5 and DRW2 was found but too few cases were studied to make possible a definite conclusion. This immunopathologic profile is compared to that of psoriasis with anthropathy. The relevance of immune disorders in the physiopathology of RP is discussed.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000818:Animals; D000917:Antibody Formation; D001172:Arthritis, Rheumatoid / Q000150:complications*; D002417:Cattle; D002462:Cell Membrane / Q000032:analysis; D003937:Diagnosis, Differential; D005260:Female; D006680:HLA Antigens / Q000032:analysis; D006801:Humans; D007111:Immunity, Cellular; D007070:Immunoglobulin A / Q000032:analysis; D007074:Immunoglobulin G / Q000032:analysis; D007075:Immunoglobulin M / Q000032:analysis; D008214:Lymphocytes / Q000187:drug effects; D008297:Male; D008875:Middle Aged; D008934:Mitogens / Q000494:pharmacology; D011565:Psoriasis / Q000150:complications / Q000276:immunology / Q000503:physiopathology*; D012397:Rosette Formation; D013601:T-Lymphocytes / Q000032:analysis
chemical_list: D006680:HLA Antigens; D007070:Immunoglobulin A; D007074:Immunoglobulin G; D007075:Immunoglobulin M; D008934:Mitogens
vernacular_title: Physiopathologie du rhumatisme psoriasique.