Hyperglycaemia and/or oxidative stress can cause IgG to be modified by advanced glycation end products (AGE). Three patients with aggressive rheumatoid arthritis (RA) and vasculitis are described who have high titres of IgM antibodies against AGE-modified IgG (IgM anti-IgG-AGE). Diabetics and randomly selected patients with rheumatic diseases, including 50 additional RA patients, were tested fo...

In this retrospective study we assessed the frequency of hypogammaglobulinemia in 708 patients with SIRS, severe sepsis and septic shock. We evaluated the relationship between hypogammaglobulinemia IgG, IgM and 28 day mortality. Total of 708 patients and 1,513 samples were analyzed. In the three subgroups we investigated, patients met the criteria of SIRS, severe sepsis and septic shock. IgG hy...

BACKGROUND Hirudin is a small protein with strong thrombin inhibition that may be antigenic. The generation and disappearance of anti-hirudin antibodies were investigated in patients with heparin-induced thrombocytopenia who were treated with recombinant hirudin (r-hirudin) for >/=5 days. METHODS AND RESULTS The IgA, IgE, IgG, and IgM isotypes of anti-hirudin antibodies were determined by ELI...

Individuals with systemic lupus erythematosus and rheumatoid arthritis are characterized by the presence of high levels of circulating IgM and IgG autoantibodies. Although IgG autoantibodies often are pathogenic, the role of IgM autoantibodies in autoimmune disease is not clear. Using mice that are unable to secrete IgM but are able to express surface IgM and IgD and to secrete other classes of...

These last months, dozens of SARS-CoV-2 serological tests have become available with varying performances. A major effort was completed to compare 17 in April 2020 Switzerland. In a preliminary phase, we compared IgG, IgM, IgA and pan Ig including ELISA, LFA, CLIA ECLIA on panel 182 sera, comprising 113 sera from hospitalized patients positive RT-PCR, 69 sampled before 1st November 2019, expect...

An unusual group of human B-cell tumors with cellular features of chronic lymphocytic leukemia or lymphoplasmacytoid leukemia, together with high levels of a monoclonal IgG serum protein, has been investigated. Analysis of tumor-derived VH genes of neoplastic B lymphocytes was used to determine the clonal relationship between the IgM expressed or secreted by the tumor cells and the IgG serum pa...

Focus Technologies developed an indirect immunoglobulin G (IgG) enzyme-linked immunosorbent assay (ELISA) and a mu-capture IgM ELISA for the detection of West Nile virus (WNV)-specific antibodies based on a WNV preM/E protein recombinant antigen. Normal and disease state serum panels were used to assess the performance characteristics of the two WNV ELISA kits. Totals of 807 and 1,423 sera were...

OBJECTIVES Leprosy household contacts represent a group at high risk of developing the disease. The aim of this study was to detect Mycobacterium leprae subclinical infection in this group through serological and molecular parameters. METHODS Serum anti-PGL1 IgG/IgM and salivary anti-PGL1 IgA/IgM was investigated using an ELISA, and nasal carriage of M. leprae DNA was detected by PCR, in lepr...

Simultaneous turnover studies with radioiodine-labelled IgM and IgG were made in 12 patients with Crohn's disease. Intestinal protein loss was estimated by means of 59Fe-labelled iron dextran. The serum levels of IgM, IgG, and IgA were normal in most cases. The catabolic rate of IgM was increased in all but one case. A positive correlation was present between the catabolic rate and serum concen...

background: toxoplasma specific igm antibodies; the common serologic marker in diagnosis of acute toxoplasmosis has its own limitations. confirmatory testing with other markers, introduced as a complementary tool in distinguish acute and chronic infections is unusual in iran. in the present study, we investigated the cor-relation between the results of igm elisa, iga elisa, and igg avidity test...