Eighty five Arab patients with classical and definite rheumatoid arthritis were typed to determine the prevalence of HLA A, B, C, and DR antigens. A significant increase in the prevalence of HLA-A10, B8, B21, and DR3 was found in comparison with a control population matched for age and sex. HLA-DR5 was significantly decreased in the patient group. The classical association of HLA-DR4 with rheum...

Rheumatoid arthritis (RA) is found more often in subjects carrying the HLA-DR1 antigen and some subtypes of the HLA-DR4 antigen than in those without these antigens. Analysis of probes specific for HLA-DR4 has shown that amino acids encoding positions 69-74 (EQRRAA) of the beta chain indicates susceptibility to RA. A hexamer sequence of proteus haemolysin spanning residues 32-37 (ESRRAL) has be...

We have demonstrated that Apo-2 ligand (Apo-2L)/tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) induces apoptosis of human prostate cancer PC-3, DU145, and LNCaP cells in a dose-dependent manner, with PC-3 cells displaying the greatest sensitivity to Apo-2L/TRAIL. Susceptibility of the prostate cancer cell types to Apo-2L/TRAIL-induced apoptosis did not appear to correlate with ...

During camptothecin- and etoposide (VP-16)-induced apoptosis in HL-60 cells, the expression level of cell death receptor-3 (DR3), cell death receptor-4 (DR4), and FAS remained mostly unchanged, whereas the expression of silencers of death domain (SODD) and FLICE inhibitory proteins, inhibitors of the cell death receptor signaling pathways, decreased substantially. By indirect immunofluorescence...

Expression of MHC class II genes by epithelial cells is induced in inflammatory conditions such as autoimmunity and organ transplantation. Class II ligands generated by the epithelial cell processing mechanisms are unknown, although some unique epitopes have been described in epithelial cells that B cells could not generate. Epithelial cells are the targets of autoreactive T cell responses in a...

CD176 (Thomsen-Friedenreich antigen) is a tumor-associated carbohydrate structure. In a previous study, we observed that the anti-CD176 antibody can induce the apoptosis of CD176-positive leukemic cells. In this study, we investigated the mechanisms of apoptosis induced by the CD176 antibody. We found that CD95 (FAS, APO-1) and the death receptor 4 (DR4) (TRAIL-R1) are co-expressed with CD176 o...

OBJECTIVE This study assessed the ability to distinguish between type 1 diabetes-affected individuals and their unaffected relatives using HLA and single nucleotide polymorphism (SNP) genotypes. RESEARCH DESIGN AND METHODS Eight models, ranging from only the high-risk DR3/DR4 genotype to all significantly associated HLA genotypes and two SNPs mapping to the cytotoxic T-cell-associated antigen...

Title of Dissertation: STRUCTURAL BASIS FOR ESCAPING NEGATIVE SELECTION BY T CELL RECEPTOR WITH HIGH AFFINITY FOR SELF ANTIGEN Yiyuan Yin, Doctor of Philosophy, 2010 Directed By: Professor Roy A. Mariuzza Department of Cell Biology and Molecular Genetics The failure to eliminate self-reactive T cells is a prerequisite for autoimmunity. To escape thymic deletion, autoreactive T cell receptors (T...

Tumour necrosis factor-related apoptosis-inducing ligand (TRAIL) is a member of the TNF cytokine family and a selective inducer of apoptosis in a range of tumour cells, but not in healthy normal, untransformed cells. It is expressed by natural killer cells and natural killer-T cells when they encounter malignantly transformed cells and it is a key effector molecule in tumour immune surveillance...