background: pulmonary tuberculosis (pt) is one of the endemic diseases in iraq, and among the suggested predisposing factors are alleles of the human leukocyte antigen (hla) system. we sought to investigate the association between hla-class i (a and b) and -class ii (dr and dq) alleles in a sample of pt iraqi patients. methods: lymphocytes of 105 pt patients and 40 controls were phenotyped for ...

OBJECTIVE We report here genotyping data and type 1 diabetes association analyses for HLA class I loci (A, B, and C) on 1,753 multiplex pedigrees from the Type 1 Diabetes Genetics Consortium (T1DGC), a large international collaborative study. RESEARCH DESIGN AND METHODS Complete eight-locus HLA genotyping data were generated. Expected patient class I (HLA-A, -B, and -C) allele frequencies wer...

In the HLA, H2, and other mammalian MHC:, the class I and II loci are separated by the so-called class III region comprised of approximately 60 genes that are functionally and evolutionarily unrelated to the class I/II genes. To explore the origin of this island of unrelated loci in the middle of the MHC: 19 homologues of HLA class III genes, we identified 19 homologues of HLA class III genes a...

OBJECTIVE To assess the relative frequency of human leukocyte antigen (HLA) class I and class II in Iraqi multiple sclerosis (MS) patients, and to ascertain whether they offer any etiologic or protective role. METHODS We conducted this study in the Baghdad MS Clinic and Teaching Laboratory Institute, Medical City, Baghdad Teaching Hospital, Baghdad, Iraq from March to July 2004. We enrolled 4...

BACKGROUND A common Human Leukocyte Antigen (HLA) class II allele, DQβ1*03:01, seems to be associated with Bullous pemphigoid (BP) in Caucasians whereas previous studies in other ethnic groups showed other HLA class II alleles as genetic predisposing factors for BP. OBJECTIVE To investigate the association of HLA class II alleles and haplotypes with BP in Iranian population. METHODS Fifty p...

Intestinal epithelial cells express a low level of HLA class II molecules constitutively, with elevated levels seen in the setting of mucosal inflammation including inflammatory bowel disease. The ability of intestinal epithelial cells to act as antigen presenting cells for alphabeta CD4(+) T lymphocytes was examined through a molecular analysis of the HLA class II antigen processing pathway. W...

Human leukocyte antigen DM (HLA-DM) molecules are structurally related to classical MHC class II molecules and reside in the lysosomallke compartment where class II-restricted antigen processing Is thought to occur. Yutsnt cell lines tacking HLA-DM ere defective In antigen processing and accumulate cuss II molecules associated wlth a nested set of invariant chain-derived peptkfes (clsas II-ssso...

Our data show that: Most BL cells express significantly less HLA class I and II than the corresponding LCLs. Lymphoblastoid cell lines have a much higher HLA class I and II density than normal peripheral blood B cells. There are qualitative differences in class I and II expression in most BL/LCL pairs. These qualitative differences are not caused by EBV infection. They might be due to a selecti...