PURPOSE HLA-B27 is a major histocompatibility complex class I (MHCI) allele that has been closely associated with the development of ankylosing spondylitis and acute anterior uveitis (AAU), the most common form of uveitis worldwide. We have been characterizing the phenotypes of transgenic mice carrying a human HLA-B27 allele, but that are deficient in endogenous mouse MHCI genes (H-2K(-/-) and ...

background: uveitis refers to diseases characterized by intraocular inflammation of the uveal tract. anterior uveitis is a common ocular disease characterized by inflammation of the iris and the ciliary body. objectives: to establish the frequency of hla-b27- positive uveitis in asian indian population, study their clinical profile and compare it with other reports in literature. methods: we re...

Data is presented showing expression of non-conventional (NC) heavy chain forms of B27 in synovial tissues from SpA patients. Data is presented showing the expression patterns of NC-B27 in joint, gastrointestinal and lymphoid tissues from B27 transgenic (TG(1)) rats with M. tuberculosis-induced SpA. Expression of NC-B27 was determined by immunohistochemistry and flow cytometry using HC10 and HD...

The frequency and the distribution of HLA-B27 subtypes in spondylarthropathy (SpA) patients and controls were investigated in a sample Turkish population. B27 subtyping was performed by PCR-SSP method in two groups: 49 unrelated HLA-B27 positive Turkish patients with the diagnosis of SpA according to the European Spondyloarthropathy Study Group Criteria, and 55 HLA-B27 positive healthy controls...

HLA B27 is associated with a number of forms of arthritis, including ankylosing spondylitis. It has been suggested that the disease is caused by Klebsiella pneumoniae and that the bacterium evokes an odd immune response because it cross-reacts with HLA B27. This proposed cross-reactivity was investigated in a number of ways. The results consistently failed to confirm evidence from cross reactio...

Polymorphonuclear leucocyte (PMN) functions (migration in vitro, chemiluminescence, O-2 production, and aggregation) were studied in 32 patients with previous yersinia arthritis (YA). PMNs of 11 HLA-B27 positive patients who had chronic or recurrent inflammatory symptoms showed O-2 production significantly higher than that of PMNs of 11 HLA-B27 positive patients without late manifestations. Als...

74 overlapping peptides of varying lengths from Klebsiella pneumoniae nitrogenase reductase (residues 181-199) and from the HLA B27.1 molecule (residues 65-85) were synthesized and tested by ELISA against sera from HLA B27+ ankylosing spondylitis (AS) patients, and sera from HLA B27+ and HLA B27- healthy first-degree relatives. Antibody activity in AS sera to Klebsiella peptides of four to eigh...

In order to develop a possible animal model to study H L A linked diseases of man, we established HLA-B27 transgenic mice (TGM). As aberrant and overexpression of M H C molecules can be toxic for cells, we aimed at obtaining a physiological expression of the human antigen and used a genomic 25kb Sal I fragment for embryo injection, coding for the H L A B * 2705 heavy chain. Five independent fou...

The prevalence of HLA-A and B antigen loci in patients with Whipple's disease was determined from data obtained in a review of the literature and from personal communications. Data on the HLA-A and B locus typing of 30 patients were available (with the exception that 1 of the patients was not typed for the HLA-B locus), and for an additional 18 patients, HLA-B27 data were available. Of the 47 p...

CD4 Th cells producing the proinflammatory cytokine IL-17 (Th17) have been implicated in a number of inflammatory arthritides including the spondyloarthritides. Th17 development is promoted by IL-23. Ankylosing spondylitis, the most common spondyloarthritis (SpA), is genetically associated with both HLA-B27 (B27) and IL-23R polymorphisms; however, the link remains unexplained. We have previousl...