title: Relationship between serum IgA levels and CD4 subsets in IgA nephropathy.
abstract: In this study, the relationship between serum levels of IgA (s-IgA) and CD4 subsets in peripheral blood was investigated in patients with IgA nephropathy (IgA N). We have also recently reported that the percentage of CD4+ CD45RA+ cells was significantly decreased in this disease. Serum levels of immunoglobulins (IgG, IgA, IgM) and the percentage of CD4+CD45RA+ cells or CD4+CD45RO+ cells were measured by two-color analysis in blood samples obtained from 45 patients with IgA N, 30 patients with various glomerulonephritides and 30 healthy volunteers. A significant decrease of CD4+ CD45RA+ cells and a significant increase of CD4+CD45RO+ cells were observed in the IgA N group. Moreover, in the IgA N group, s-IgA correlated negatively with the percentage of CD4+CD45RA+ cells and correlated positively with that of CD4+CD45RO+ cells. After 1 and 2 years, the same analyses were serially performed in 15 nonmedicated patients with IgA N. Similar results concerning the relationship between s-IgA and CD4 subsets were obtained both after 1 and 2 years. The percent changes of s-IgA (delta s-IgA) correlated with delta CD4+CD45RO+ cells: r = -0.66483 (p < 0.01) after 1 year, r = -0.69688 (p < 0.01) after 2 years. On the other hand, delta s-IgA correlated with delta CD4+CD45RA+ cells (p < 0.05) after 1 year, but no after 2 years. It was concluded that s-IgA levels strongly correlate with the percentage of CD4+ CD45RO+ cells in peripheral blood, in patients with IgA N.
authors.affiliation: 4th Department of Internal Medicine, Teikyo University School of Medicine, Kawasaki, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Sato
authors.forename: H
authors.initials: H
authors.lastname: Haizuka
authors.forename: H
authors.initials: H
authors.lastname: Asakura
mesh_terms: D000293:Adolescent; D000328:Adult; D015496:CD4-Positive T-Lymphocytes; D005260:Female; D005922:Glomerulonephritis, IGA / Q000097:blood* / Q000276:immunology; D006801:Humans; D007070:Immunoglobulin A / Q000097:blood*; D017493:Leukocyte Common Antigens / Q000097:blood; D008297:Male; D008875:Middle Aged; D012016:Reference Values; D016176:T-Lymphocyte Subsets / Q000276:immunology
chemical_list: D007070:Immunoglobulin A; D017493:Leukocyte Common Antigens