نتایج جستجو برای: kir gene
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Background : Ankylosing spondylitis (AS) represents a progressive and debilitating disease that affects approximately 0.9% worldwide. So far the precise mechanisms underlying the initiation and progression of AS is still unclear. Linkage between HLA-B27 and AS remains the strongest association between a human leukocyte antigen (HLA) class I molecule and disease. Despite intensive research, the ...
Although the KIR gene content polymorphism has been studied worldwide, only a few isolated or Amerindian populations have been analyzed. This extremely diverse gene family codifies receptors that are expressed mainly in NK cells and bind HLA class I molecules. KIR-HLA combinations have been associated to several diseases and population studies are important to comprehend their evolution and the...
Previously, we showed that Killer Immunoglobulin-like Receptor (KIR)3DS1 homozygotes (hmz) are more frequent in HIV exposed seronegative (HESN) than in recently HIV infected (HIV+) individuals. KIR3DS1 encodes an activating Natural Killer (NK) cell receptor (NKR). The link between KIR genotype and HIV outcomes likely arises from the function that NK cells acquire through expression of particula...
Killer immunoglobulin-like receptors (KIR) bind self-major histocompatibility complex class I molecules, allowing natural killer (NK) cells to recognize aberrant cells that have down-regulated class I. NK cells express variable numbers and combinations of highly homologous clonally restricted KIR genes, but uniformly express KIR2DL4. We show that NK clones express both 2DL4 alleles and either o...
Purpose HLA class I-specific killer cell immunoglobulin-like receptors (KIR) gene and HLA gene combinations have been associated with autoimmune uveitis (e.g., birdshot chorioretinopathy (BCR) and Vogt-Koyanagi-Harada syndrome (VKH)). In oligoarticular juvenile idiopathic arthritis (JIA), uveitis is one of the most serious complications, affecting approximately 20% of patients. Multiple studies...
Killer Ig-like receptor (KIR) genes are a multigene family on human chromosome 19. KIR genes occur in various combinations on different haplotypes. Additionally, KIR genes are polymorphic. To examine how allelic polymorphism diversifies KIR haplotypes with similar or identical combinations of KIR genes, we devised methods for discriminating alleles of KIR2DL1, -2DL3, -3DL1, and -3DL2. These met...
Human NK cells are characterized by the expression of surface receptors of the killer cell Ig-like receptor (KIR) family, which are involved in the specific recognition of pathogenic target cells. Each NK cell expresses and maintains an individual subset of inhibitory and stimulatory KIR and in this way contributes to a diversified NK cell repertoire. To date, the molecular basis for generation...
Natural killer (NK) cells are key members of innate immunity against tumor and infection. Killer cell immunoglobulin-like receptor (KIR) genes regulates NK cell function, which varies substantially between individuals in the number and type. Specific KIRs are associated with certain diseases. Herein we investigated if KIR genes are associated with thyroid cancer risk. Eighty-five patients with ...
The human leukocyte receptor complex (LRC) on chromosome 19q13.4 encodes Ig superfamily receptors expressed on hemopoietic cells. Killer Ig-like receptors (KIR) are expressed in cytotoxic lymphocytes but other LRC molecules (Ig-like transcript(ILT)/leukocyte Ig-like receptor (LIR)) are more ubiquitous. We investigated expression of the ILT2/LIR1 inhibitory receptor compared with the related KIR...
Through differential killer cell Ig-like receptor (KIR) and CD94:NKG2 gene expression, human NK cells generate diverse repertoires, each cell having an inhibitory receptor for autologous HLA class I. Using a new method for measuring repertoire difference that integrates multiple flow cytometry parameters, we found individual repertoire stability, but population variability. Correlating repertoi...
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