Antibodies to the Ro/SSA antigen occur in patients with systemic lupus erythematosus and Sjogren's syndrome. An immunoaffinity method for the preparation of electrophoretically homogeneous Ro/SSA antigen is described. Several molecular properties of the antigen have been determined. The native RNA protein particle has a molecular weight of 100,000 D determined by gel filtration. Sodium dodecyl ...

Replication protein A (RPA), a heterotrimer with subunits of molecular masses 70, 32, and 14 kDa, is a single-stranded-DNA-binding factor involved in DNA replication, repair, and recombination. There have been only three reported cases of anti-RPA in systemic lupus erythematosus (SLE) and Sjögren syndrome (SjS). This study sought to clarify the clinical significance of autoantibodies against RP...

It has previously been shown that sera from multiparous women have increased levels of anti-idiotypic antibodies specific for anti-HLA molecules. -Globulins prepared from these sera may be superior to commercial preparations of intravenous -globulin (IVIg) for inhibiting HLA alloimmunization. To test this, F(ab )2 fragments prepared from either commercial IVIg or from the sera of men or multipa...

In an attempt to produce allonatibodies to cytotoxic T-cell receptors, hyperimmune anti-lymphocyte antisera have been raised in mice of various strain combinations, and have been tested for their ability to block allogeneic cell-mediated lymphocytotoxicity (CML) in the absence of complement at the T killer cell level. Most of the sera failed to show any significant and reproducible inhibitory e...

introduction: acute idiopathic thrombocytopenic purpura (itp) is an autoimmune bleeding disorder of childhood caused by production of auto antibodies against platelets. the aim of the present study was to compare the efficacy of intravenous immunoglobulin (ivig) and intravenous anti-d(iv anti-d) in itp treatment. methods and materials: in a clinical trial, 43 children with acute itp referred to...

Background: Evidences have shown that anti-M3 muscarinic acetylcholine receptor IgG (anti-M3 mAChR IgG) are clinically useful autoantibody that exert a cholinergic pharmacologic effect binding and interacting with M3 mAChR at the level of exocrine gland (salivary and ocular). Aims: The aim of this study was to determine the associations between serum level of anti-M3 mAChR IgG in patients with ...

Abstract Background Hepatitis D virus (HDV) is highly pathogenic, and clinical studies revealed that HDV infection aggravates the natural history of underlying hepatitis B (HBV) by progression to cirrhosis leads early decompensation liver function compared with HBV mono-infection. To determine seroprevalence among HBsAg-seropositive patients associated biochemical profiles at Maiduguri, Nigeria...

Blood group I activities of the purified glycosphingolipid lacto-N-iso-octaosyl ceramide (Fromula: see text) and 8 of its analogues have been evaluated with 11 anti-I sera including 5 anti-I sera previously tested. All but one of the antisera were inhibited by the lacto-N-iso-octaosyl structure. Three types of I-specificity could be distinguished although none of the anti-I sera was identical i...

The Toxoplasma gondii rhoptry protein Rop2 was expressed in Escherichia coli as a fusion protein containing 44 kDa of the 55-kDa mature Rop2, supplied with six histidyl residues at the N-terminal end (Rop2196-561). Humoral response during Toxoplasma infection of humans was analyzed by immunoglobulin G (IgG), IgA, and IgM enzyme-linked immunosorbent assay with Rop2196-561 as the antigen substrat...

An antibody population which reacts only with human sickle cell hemoglobin (HbS) and not with normal human hemoglobin, has been isolated from goat, sheep, and guinea pig antisera. These antibody populations termed anti-Val (Val), isolated from an individual goat (no. 6) and sheep (no. 26) have been used to elicit anti-idiotypic responses in rabbits. These anti-idiotypic sera were used to study ...