The formation of supramolecular activation clusters within the immunological synapse, crucial for sustained signaling and T lymphocyte activation, requires costimulation-dependent reorganization of the actin cytoskeleton. Here we have identified the actin-remodeling protein cofilin as a key player in this process. Cell-permeable peptides that block costimulation-induced cofilin/F-actin interact...

T cell activation is based on interactions of T cell antigen receptors with MHC-peptide complexes in a specialized cell-cell junction between the T cell and antigen-presenting cell-the immunological synapse. The immunological synapse coordinates naïve T cell activation and migration by stopping T cell migration with antigen-presenting cells bearing appropriate major histocompatibility complex (...

Aconitum kusnezoffii Reichb., one of the earliest recorded toxic species of genus Aconitum, has been used as traditional Chinese medicine and medicinal diet over the last 2500 years to treat heart failure congestion, neuralgia, rheumatism and gout, etc. In the present paper, four water-soluble polysaccharide fractions isolated from the tubers of A. kusnezoffii Reichb. were studied the antioxida...

Background and aims: The frequency of chronic hepatitis B virus infection varies totally in different part of the world but it could be categorized as high, intermediate and low endimicity. In this regard, development of safe and effective vaccines against infectious diseases especially hepatitis B virus that are still required for emerging new pathogens, re-emerging old pathog...

the aim of the clinical laboratory in endocrine disease diagnosis and management is detecting either the hormones or their downstream reaction metabolites or some other related substances. in the case of hormone measurement almost all the routine methods are based on immunoassay with different labels (radioimmunoassay, enzyme linked immunosorbant assay, chemiluminescence assays …) and different...

Introduction: Autoimmune hepatitis (AIH) is one of autoimmune disorder with complex pathophysiology. Many genes involved in lethal including STAT4 gene. The aim this study to determine gene polymorphisms and relation SNPs disease severity among AIH patients. Method: One hundred patient which diagnosed by clinically, ANA ASMA 100 control age matched healthy children were enrolled study. Patients...

The most prevalent form of chronic dermatophytoses causing pathogenic fungus in humans is Trichophyton rubrum. Keratinocytes, the main epidermal cells, are crucial local immune interactions because they represent first line defense against microbial assaults, skin In response to varied stimuli, keratinocytes express a wide range receptors and create host peptides, cytokines, chemokines, this im...

This study examined the emetic activity of several staphylococcal enterotoxin type A and B (SEA and SEB, respectively) mutants that had either one or two amino acid residue substitutions. New sea gene mutations were constructed by site-directed mutagenesis; gene products were obtained with glycine residues at position 25, 47, 48, 81, 85, or 86 of mature SEA. Culture supernatants from Staphyloco...

Gut-derived lymphocytes transiently migrate through the peripheral circulation before homing back to mucosal sites and can be detected using an ELISPOT-based antibody secreting cell (ASC) assay. Alternatively, transiently circulating lymphocytes may be cultured in vitro, and culture supernatants may be assayed for antigen-specific responses (antibody in lymphocyte supernatant [ALS] assay). The ...