Relevant bibliographies by topics / Killer immunoglobulin like receptors (KIR)

Academic literature on the topic 'Killer immunoglobulin like receptors (KIR)'

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Published: 4 June 2021
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Journal articles on the topic "Killer immunoglobulin like receptors (KIR)"

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Hidajat, Melanny, Dominik Selleslag, Achiel Van Hoof, Jan Van Droogenbroeck, Johan Billiet, and Arnold Criel. "Killer Immunoglobulin-Like Receptors (KIRs) Genotypes in a Belgian Population." Blood 104, no. 11 (November 16, 2004): 3852. http://dx.doi.org/10.1182/blood.v104.11.3852.3852.

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Abstract KIRs (Killer cell Immunoglobulin-like Receptors) are expressed on NK (Natural Killer) cells and a subpopulation of T lymphocytes namely memory CD8+ T cells. The distribution of KIR genes varies among individuals and populations. These genes are encoded on chromosome 19 (19q13.4). Till now 17 KIR genes and pseudogenes have been identified. KIRs recognise groups of HLA class I alleles. NK activity is partially controlled through the interaction between KIRs and their HLA ligands. Several studies report that KIRs may affect the outcome of Hematopoietic Stem-Cell Transplantations. We performed KIR typing of 17 genes and pseudogenes in 100 healthy Belgian unrelated individuals in “West-Vlaanderen” from Caucasoid origin using a PCR-SSP method. Three genes (KIR3DL3, 2DL4 and 3DL2), named frame-work genes, and the pseudogene 3DP1 were found in all individuals. KIR2DL1 and 2DP1 genes were present in a frequency of 99%. In addition, KIR3DL1 and 2DS4 genes represented a frequency of 97. The KIR2DL3 was found in 90% and the frequencies of other genes varied between 56% and 24%. The individual KIR gene content ranged from 8 to 17 genes. A total of 19 KIR locus profiles was observed. The most common KIR locus profile (32%) consisted of a combination of genes characterising A haplotypes (KIR2DL1 and 2DL3) without the presence of genes characteristic of B haplotypes (KIR2DL2 and 2DS2). The second most common KIR locus profile, accounting for 20% contained a combination of genes characteristics for both A and B haplotypes. The allele KIR2DS4*003 was found in 89% and KIR2DS4*00101/00102/002 only in 41%. KIR3DP1*00301/00302 was present in all individuals and KIR3DP1*001/002 only in 35%. Our results show that frequencies of most KIR loci in our Belgian population were comparable to literature data of other Caucasian populations. Only KIR2DS1 was lower (27% vs 47.7% with a p-value of 0.0002). In the future, KIR typing of donor and patient before a Hematopoietic Stem-cell Transplantation may be necessary, due to the diversity in KIR genotypes.
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Cremer, Anja, Ute Heider, Stefan Tomiuk, Andreas Arendt, Jurgen Schmitz, Andreas Bosio, Volker Huppert, and Christian Biervert. "Integrated Genotyping and mRNA Expression Profiling of Killer Immunoglobulin-Like Receptors." Blood 106, no. 11 (November 16, 2005): 3909. http://dx.doi.org/10.1182/blood.v106.11.3909.3909.

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Abstract Natural killer (NK) cells belong to a subgroup of lymphocytes (CD3-CD56+) which play an important role in the cellular immune response against virus-infected cells and tumors. The activity of NK cells is regulated by a balance of triggering and inhibitory receptors, including Killer Ig-like Receptor (KIR) molecules which interact with specific HLA class I molecules, predominantly HLA-C, on target cells. The 17 known KIR genes are divided into two classes: activating KIRs and inhibitory KIRs. There is strong evidence that inhibitory KIR mismatch between donor and recipient improves the outcome of haploidentical hematopoietic stem cell transplantation (HSTC) in leukemia patients (Ruggeri et al. 2002). In addition, the KIR-HLA constellation is assumed to have an influence on the severity of graft versus host disease (GvHD). Whether these activities of NK cells are clinically important and to what extent these processes are mediated only by KIR-HLA class I interactions remains to be determined. In human populations, KIR gene haplotypes vary in the number and type of KIR genes they contain. Further diversification is observed by expanded allelic polymorphism at the individual genes. In general, KIR haplotypes contain 7–12 genes plus 2 pseudogenes. Extra KIR heterogeneity is provided at the expression level: different subsets of NK cells within an individual express different KIRs. Recently, it was shown that KIR genotyping alone does not seem to be sufficient for donor KIR assessment because of the lack of gene expression in approximately one-fourth of the individuals for one of the inhibitory KIRs that recognize the three major groups of MHC class I ligands (Leung et al. 2005). KIR phenotyping by flow cytometry using monoclonal antibodies is insufficient due to the lack of specific monoclonal antibodies. For trustworthy analysis, one has to combine KIR genotyping with mRNA expression profiling and flow cytometry. Therefore, we developed a new set of sequence-specific primers (SSP). This primer set can be applied to perform either KIR genotyping or mRNA expression profiling despite the high degree of identity of the genes (80–90%, sometimes more than 95%). The primers of each KIR gene (15 genes and 2 pseudogenes) cover all allelic variants annotated by the IPD KIR Sequence Data Base (status quo July 05). Using this primer set, we genotyped 25 individuals, and compared the results with other sets of KIR primers published elsewhere. Additionally, we show the mRNA expression profile employing the same set of new primers. We confirmed these results on the protein level by flow cytometry.
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Luc-Aimé, Kagoué Simeni, Yindom Louis-Marie, Loni Ekali Gabriel, Clauvis Kunkeng Yengo, F. Esemu Livo, and Nguedia Jules Clement Assob. "Killer-Cell Immunoglobulin-Like Receptors (KIR) in HIV-Exposed Infants in Cameroon." Journal of Immunology Research 2021 (January 13, 2021): 1–7. http://dx.doi.org/10.1155/2021/9053280.

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The biological reason(s) behind persistent mother-to-child transmission (MTCT) of HIV (albeit at reduced rate compared to the preantiretroviral therapy era) in spite of the successful implementation of advanced control measures in many African countries remains a priority concern to many HIV/AIDS control programs. This may be partly due to differences in host immunogenetic factors in highly polymorphic regions of the human genome such as those encoding the killer-cell immunoglobulin-like receptor (KIR) molecules which modulate the activities of natural killer cells. The primary aim of this study was to determine the variants of KIR genes that may have a role to play in MTCT in a cohort of infants born to HIV-infected mothers in Yaoundé, Cameroon. We designed a cross-sectional study to molecularly determine the frequencies of 15 KIR genes in 14 HIV-exposed infected (HEI), 39 HIV-exposed/uninfected (HEU), and 27 HIV-unexposed/uninfected (HUU) infants using the sequence specific primer polymerase chain reaction (PCR-SSP) method. We found that all 15 KIR genes were present in our cohort. The frequency of KIR2DL1 was significantly higher in the unexposed (control) group than in the HIV-exposed group ( OR = 0.22 , P = 0.006 ). Stratifying analysis by infection status but focusing only on exposed infants revealed that KIR2DL5, KIR2DS1, and KIR2DS5 were significantly overrepresented among the HIV-exposed/uninfected compared to infected infants ( OR = 0.20 , P = 0.006 ). Similarly, the frequencies of KIR2DS1, KIR2DS5, and KIR2DL5 were significantly different between infants perinatally infected with HIV (HIV+ by 6 months of age) and HIV-negative infants. Our study demonstrates that KIR genes may have differential effects with regard to MTCT of HIV-1.
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Parham, Peter, Paul J. Norman, Laurent Abi-Rached, and Lisbeth A. Guethlein. "Human-specific evolution of killer cell immunoglobulin-like receptor recognition of major histocompatibility complex class I molecules." Philosophical Transactions of the Royal Society B: Biological Sciences 367, no. 1590 (March 19, 2012): 800–811. http://dx.doi.org/10.1098/rstb.2011.0266.

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In placental mammals, natural killer (NK) cells are a population of lymphocytes that make unique contributions to immune defence and reproduction, functions essential for survival of individuals, populations and species. Modulating these functions are conserved and variable NK-cell receptors that recognize epitopes of major histocompatibility complex (MHC) class I molecules. In humans, for example, recognition of human leucocyte antigen (HLA)-E by the CD94:NKG2A receptor is conserved, whereas recognition of HLA-A, B and C by the killer cell immunoglobulin-like receptors (KIRs) is diversified. Competing demands of the immune and reproductive systems, and of T-cell and NK-cell immunity—combined with the segregation on different chromosomes of variable NK-cell receptors and their MHC class I ligands—drive an unusually rapid evolution that has resulted in unprecedented levels of species specificity, as first appreciated from comparison of mice and humans. Counterparts to human KIR are present only in simian primates. Observed in these species is the coevolution of KIR and the four MHC class I epitopes to which human KIR recognition is restricted. Unique to hominids is the emergence of the MHC-C locus as a supplier of specialized and superior ligands for KIR. This evolutionary trend is most highly elaborated in the chimpanzee. Unique to the human KIR locus are two groups of KIR haplotypes that are present in all human populations and subject to balancing selection. Group A KIR haplotypes resemble chimpanzee KIR haplotypes and are enriched for genes encoding KIR that bind HLA class I, whereas group B KIR haplotypes are enriched for genes encoding receptors with diminished capacity to bind HLA class I. Correlating with their balance in human populations, B haplotypes favour reproductive success, whereas A haplotypes favour successful immune defence. Evolution of the B KIR haplotypes is thus unique to the human species.
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Treanor, Bebhinn, Peter M. P. Lanigan, Sunil Kumar, Chris Dunsby, Ian Munro, Egidijus Auksorius, Fiona J. Culley, et al. "Microclusters of inhibitory killer immunoglobulin–like receptor signaling at natural killer cell immunological synapses." Journal of Cell Biology 174, no. 1 (June 26, 2006): 153–61. http://dx.doi.org/10.1083/jcb.200601108.

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We report the supramolecular organization of killer Ig–like receptor (KIR) phosphorylation using a technique applicable to imaging phosphorylation of any green fluorescent protein–tagged receptor at an intercellular contact or immune synapse. Specifically, we use fluorescence lifetime imaging (FLIM) to report Förster resonance energy transfer (FRET) between GFP-tagged KIR2DL1 and a Cy3-tagged generic anti-phosphotyrosine monoclonal antibody. Visualization of KIR phosphorylation in natural killer (NK) cells contacting target cells expressing cognate major histocompatibility complex class I proteins revealed that inhibitory signaling is spatially restricted to the immune synapse. This explains how NK cells respond appropriately when simultaneously surveying susceptible and resistant target cells. More surprising, phosphorylated KIR was confined to microclusters within the aggregate of KIR, contrary to an expected homogeneous distribution of KIR signaling across the immune synapse. Also, yellow fluorescent protein–tagged Lck, a kinase important for KIR phosphorylation, accumulated in a multifocal distribution at inhibitory synapses. Spatial confinement of receptor phosphorylation within the immune synapse may be critical to how activating and inhibitory signals are integrated in NK cells.
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Abi-Rached, Laurent, and Peter Parham. "Natural selection drives recurrent formation of activating killer cell immunoglobulin-like receptor and Ly49 from inhibitory homologues." Journal of Experimental Medicine 201, no. 8 (April 18, 2005): 1319–32. http://dx.doi.org/10.1084/jem.20042558.

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Expression of killer cell Ig-like receptors (KIRs) diversifies human natural killer cell populations and T cell subpopulations. Whereas the major histocompatibility complex class I binding functions of inhibitory KIR are known, specificities for the activating receptors have resisted analysis. To understand better activating KIR and their relationship to inhibitory KIR, we took the approach of reconstructing their natural history and that of Ly49, the analogous system in rodents. A general principle is that inhibitory receptors are ancestral, the activating receptors having evolved from them by mutation. This evolutionary process of functional switch occurs independently in different species to yield activating KIR and Ly49 genes with similar signaling domains. Selecting such convergent evolution were the signaling adaptors, which are older and more conserved than any KIR or Ly49. After functional shift, further activating receptors form through recombination and gene duplication. Activating receptors are short lived and evolved recurrently, showing they are subject to conflicting selections, consistent with activating KIR's association with resistance to infection, reproductive success, and susceptibility to autoimmunity. Our analysis suggests a two-stage model in which activating KIR or Ly49 are initially subject to positive selection that rapidly increases their frequency, followed by negative selection that decreases their frequency and leads eventually to loss.
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Rettman, Pauline, Matthew D. Blunt, Rebecca J. Fulton, Andres F. Vallejo, Leidy Y. Bastidas-Legarda, Laura España-Serrano, Marta E. Polak, Aymen Al-Shamkhani, Christelle Retiere, and Salim I. Khakoo. "Peptide: MHC-based DNA vaccination strategy to activate natural killer cells by targeting killer cell immunoglobulin-like receptors." Journal for ImmunoTherapy of Cancer 9, no. 5 (May 2021): e001912. http://dx.doi.org/10.1136/jitc-2020-001912.

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BackgroundNatural killer (NK) cells are increasingly being recognized as agents for cancer immunotherapy. The killer cell immunoglobulin-like receptors (KIRs) are expressed by NK cells and are immunogenetic determinants of the outcome of cancer. In particular, KIR2DS2 is associated with protective responses to several cancers and also direct recognition of cancer targets in vitro. Due to the high homology between activating and inhibitory KIR genes to date, it has been challenging to target individual KIR for therapeutic benefit.MethodsA novel KIR2DS2-targeting therapeutic peptide:MHC DNA vaccine was designed and used to immunize mice transgenic for KIR genes (KIR-Tg). NK cells were isolated from the livers and spleens of vaccinated mice and then analyzed for activation by flow cytometry, RNA profiling and cytotoxicity assays. In vivo assays of NK cell function using a syngeneic cancer model (B16 melanoma) and an adoptive transfer model for human hepatocellular carcinoma (Huh7) were performed.ResultsInjecting KIR-Tg mice with the vaccine construct activated NK cells in both liver and spleens of mice, with preferential activation of KIR2DS2-positive NK cells. KIR-specific activation was most marked on the CD11b+CD27+ mature subset of NK cells. RNA profiling indicated that the DNA vaccine upregulated genes associated with cellular metabolism and downregulated genes related to histone H3 methylation, which are associated with immune cell maturation and NK cell function. Vaccination led to canonical and cross-reactive peptide:MHC-specific NK cell responses. In vivo, DNA vaccination led to enhanced antitumor responses against B16F10 melanoma cells and also enhanced responses against a tumor model expressing the KIR2DS2 ligand HLA-C*0102.ConclusionWe show the feasibility of a peptide-based KIR-targeting vaccine strategy to activate NK cells and hence generate functional antitumor responses. This approach does not require detailed knowledge of the tumor peptidomes nor HLA matching with the patient. It therefore offers a novel opportunity for targeting NK cells for cancer immunotherapy.
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Rajagopalan, Sumati, and Eric O. Long. "Understanding how combinations of HLA and KIR genes influence disease." Journal of Experimental Medicine 201, no. 7 (April 4, 2005): 1025–29. http://dx.doi.org/10.1084/jem.20050499.

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Combinations of HLA and killer cell immunoglobulin–like receptor (KIR) genes have been associated with diseases as diverse as autoimmunity, viral infections, reproductive failure, and now cancer. Much as early observations of disease associations with HLA polymorphism preceded a detailed knowledge of HLA recognition by T cell receptors, the recently reported disease associations with HLA–KIR gene combinations beg for a better understanding of the underlying mechanisms.
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Diaz-Peña, Roberto, Patricia Mondelo-Macía, Antonio José Molina de la Torre, Rebeca Sanz-Pamplona, Víctor Moreno, and Vicente Martín. "Analysis of Killer Immunoglobulin-Like Receptor Genes in Colorectal Cancer." Cells 9, no. 2 (February 24, 2020): 514. http://dx.doi.org/10.3390/cells9020514.

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Natural killer cells (NK cells) play a major role in the immune response to cancer. An important element of NK target recognition is the binding of human leucocyte antigen (HLA) class I molecules by killer immunoglobulin-like receptors (KIRs). Colorectal carcinoma (CRC) is one of the most common types of inflammation-based cancer. The purpose of the present study was to investigate the presence of KIR genes and HLA class I and II alleles in 1074 CRC patients and 1272 controls. We imputed data from single-nucleotide polymorphism (SNP) Illumina OncoArray to identify associations at HLA (HLA–A, B, C, DPB1, DQA1, DQB1, and DRB1) and KIRs (HIBAG and KIR*IMP, respectively). For association analysis, we used PLINK (v1.9), the PyHLA software, and R version 3.4.0. Only three SNP markers showed suggestive associations (p < 10−3; rs16896742, rs28367832, and rs9277952). The frequency of KIR2DS3 was significantly increased in the CRC patients compared to healthy controls (p < 0.005). Our results suggest that the implication of NK cells in CRC may not act through allele combinations in KIR and HLA genes. Much larger studies in ethnically homogeneous populations are needed to rule out the possible role of allelic combinations in KIR and HLA genes in CRC risk.
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Harvey, D., J. J. Pointon, C. Sleator, A. Meenagh, C. Farrar, J. Y. Sun, D. Senitzer, D. Middleton, M. A. Brown, and B. P. Wordsworth. "Analysis of killer immunoglobulin-like receptor genes in ankylosing spondylitis." Annals of the Rheumatic Diseases 68, no. 4 (November 19, 2008): 595–98. http://dx.doi.org/10.1136/ard.2008.095927.

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Objectives:To assess the possible association of killer immunoglobulin-like receptor (KIR) genes, specifically KIR3DL1, KIR3DS1 and KIR3DL2, with ankylosing spondylitis (AS).Methods:14 KIR genes were genotyped in 200 UK patients with AS and 405 healthy controls using multiplex polymerase chain reaction. Sequence-specific oligonucleotide probes were used to subtype 368 cases with AS and 366 controls for 12 KIR3DL2 alleles. Differences in KIR genotypes and KIR3DL2 allele frequencies were assessed using the χ2 test.Results:KIR3DL1 and KIR3DS1 gene frequencies were very similar in cases with AS and controls (odds ratio = 1.5, 95% confidence interval 0.8 to 3.0, and odds ratio = 1.02, 95% confidence interval 0.2 to 5.3, respectively). KIR3DL2 allele frequencies were not significantly different between cases with AS and controls.Conclusions:Neither the KIR gene content of particular KIR haplotypes nor KIR3DL2 polymorphisms contribute to AS.
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Dissertations / Theses on the topic "Killer immunoglobulin like receptors (KIR)"

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Yindom, Louis Marie. "Human Leukocyte Antigen (HLA) and Killer Immunoglobulin-like Receptors (KIR) in HIV-2 Infection." Thesis, Open University, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.520671.

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Braun, Kali. "Association of killer immunoglobulin-like receptor (KIR) genes with tuberculosis disease in two Canadian cohorts." PLoS ONE, 2013. http://hdl.handle.net/1993/22042.

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In Canada, and more specifically in Canadian-born Aboriginals and foreign born populations, high incidence of tuberculosis (TB) causes significant morbidity and mortality. The presence or absence of specific killer immunoglobulin-like receptor (KIR) genes, individually or in conjunction, may be associated with tuberculosis (active, latent, or uninfected disease status) as well as ethnicity of an individual. It is hypothesized that the differences in KIR profiles, gene frequencies, and/or haplotypes in Canadian-born Aboriginal, Canadian-born non-Aboriginal, and foreign born individuals elicits a differential activation or inhibition profile, resulting in differential cytokine expression and eventually contributes to the outcome of TB infection. In this study we examined the enrichment or depletion of KIR genes in different ethnic populations in Manitoba with special focus on active, latent, and uninfected TB status. In addition, we sought to explore the statistical correlation between TB status and inhibitory/stimulatory KIR haplotypes.
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Sepulveda, Christian Alberto Garcia. "Killer cell Immunoglobulin-like Receptor (KIR) polymorphism : functional implications and clinical relevance." Thesis, University College London (University of London), 2005. http://discovery.ucl.ac.uk/1444690/.

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NK cell function is regulated by Killer-cell Immunoglobulin-like Receptors (KIR) some of which recognise class I Major Histocompatibility Complex molecules. KIRs have been shown to exhibit a high degree of functional diversity which is generated at several levels. However, the functional relevance of this diversity remains largely unknown. This thesis describes our approach towards elucidating the functional relevance of KIR diversity. To study this we first compiled all known KIR sequences into a database. We developed bioinformatics tools to facilitate the study of these sequences and have made both the tools and database publicly accessible online. Subsequent efforts were directed towards investigating the structural impact of KIR polymorphism by means of molecular modelling software. The results that were generated by this approach have provided information with regards to the ligand binding properties of most activating KIR proteins. In addition, we have also developed a KIR gene typing system capable of detecting all known KIR genes as well as the alleles of five of the KIR proteins for which a ligand has been described. We have implemented this KIR typing system to three different sample panels: a reference panel of more than 100 B-lymphoblastoid cell lines (BLCL), a family based KIR haplotype segregation study and a cohort of 141 unrelated donor (UD) haematopoietic stem cell transplant pairs. Our investigations have allowed us to generate the largest KIR typing reference panel, to characterise the KIR profile of a Mexican Mestizo population and to investigate the clinical relevance of KIRs in UD-Haematopoietic Stem Cell Transplantation (HSCT). Our results demonstrate that the beneficial effect of NK alloreactivity in the Graft-versus-Host direction as predicted by Ruggeri's algorithm cannot be applied to the UD-HSCT setting. In addition, I describe our findings relating to the clinical role of KIR genes and alleles in the UD-HSCT cohort.
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Halfpenny, Iris A. "An investigation into the genetics of the killer immunoglobulin-like receptor (KIR) gene family." Thesis, University of Ulster, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.494359.

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Foley, Bree Amanda. "The immunogenetics of natural killer cell alloreactivity." University of Western Australia. School of Pathology and Laboratory Medicine, 2008. http://theses.library.uwa.edu.au/adt-WU2008.0242.

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[Truncated abstract] Natural killer (NK) cell alloreactivity can be exploited in haploidentical haematopoietic stem cell transplantation (HSCT) to improve graft survival, reduce graft versus host disease and decrease leukaemic relapse. NK cells lyse cells that have reduced expression of class I HLA molecules. In an allogeneic setting, donor NK cells may be activated by the absence of donor (self) class I HLA molecules on recipient cells; the absence of self-epitopes being detected by inhibitory KIR receptors on donor NK cells. The way in which genetic polymorphism of the receptors and ligands affects NK allorecognition of missing self, has not been fully elucidated. HLA-C molecules are divided into two groups, C1 and C2, with KIR2DL1 recognising cells expressing C2 and KIR2DL2 and KIR2DL3 recognising cells expressing C1. Donor NK cells expressing KIR2DL2 or KIR2DL3 can be alloreactive towards a recipient if they lack the C1 epitope and donor NK cells expressing KIR2DL1 can be alloreactive towards a recipient if they lack the C2 epitope. KIR3DL1 recognises the Bw4 epitope present on one-third of HLA-B alleles and certain HLA-A alleles. NK cells from donors expressing KIR3DL1 can be alloreactive towards recipients whose cells lack Bw4. Mismatches of KIR related HLA epitopes does not always results in NK alloreactivity. Therefore it is not possible to reliably predict NK alloreactivity based solely on the donor's HLA type and KIR repertoire and the recipient's HLA type. ... All Bw4-positive HLA-B alleles, with the exception of HLA-B*1301 and B*1302, protected targets from lysis. HLA-A*2402 and HLA-A*3201 unequivocally protected target cells from lysis whereas HLA-A*2501 and HLA-A*2301 provided only weak protection from lysis. KIR3DL1-dependent alloreactive NK clones were identified in donors whose only Bw4 positive allele was HLA-A*2402 but not in donors whose only Bw4 positive HLA allele was HLA-B*1301 or B*1302. Finally this thesis demonstrated that an activating KIR can control NK cell alloreactivity. Donors who are C2 negative and KIR2DS1 positive had NK cells that expressed the activating receptor KIR2DS1 and were capable of lysing cells expressing the C2 epitope. More so, KIR2DS1 dependent NK clones were shown to override inhibitory signals generated by NKG2A interacting with its ligand, HLA-E. The identification of these NK clones has important implications for haploidentical HSCT in that recipient expressing all three NK epitopes, C1, C2 and Bw4 were previously thought to be resistant to alloreactive NK cells controlled by inhibitory receptors. Such patients may be amenable to haploidentical HSCT from C2 negative, KIR2DS1 positive donors. These results will improve the ability to predict NK cell alloreactivity based on a donor's HLA type and KIR repertoire and the recipient?s HLA type.
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Salim, Patrícia Hartstein. "Estudo do polimorfismo dos genes KIR na esclerose sistêmica." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2009. http://hdl.handle.net/10183/15457.

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As células Natural Killer (NK) fazem parte da resposta imune inata, sendo a primeira linha de defesa do organismo contra vírus, bactérias, tumores e microorganismos. Estas células induzem a morte da célula-alvo quando não há o reconhecimento das moléculas de antígenos leucocitários humanos (HLA) de classe I, através de seus receptores, chamados Killer cell Immunoglobulin-like Receptor (KIR). Vários estudos demonstram o envolvimento dos genes KIR na patogênese das doenças auto-imunes. Acredita-se que combinações desses genes possam ser favoráveis para o desenvolvimento da esclerose sistêmica (ES). Portanto, o conhecimento destes genes relacionados às células NK poderiam ser úteis para o entendimento da patogênese da ES. O objetivo deste estudo é investigar o polimorfismo dos genes KIR em um grupo de pacientes com ES, incluindo a forma difusa e limitada da doença. A freqüência do receptor inibidor KIR2DL2 foi significantemente menor nos pacientes comparada com a do grupo controle (28,7% versus 65,2%; P<0,001; OR=0,21; IC95% 0,11–0,38). Quando analisamos a combinação do receptor inibidor 2DL2, com a presença do ativador 2DS2 (KI2DS2+/KIR2DL2-), encontramos uma maior freqüência nos pacientes (26,1% versus 1,7%; P<0,001; OR=19,94; IC95% 4,7–175,1). Por outro lado, a presença de ambos KIR2DL2 e KIR2DS2 foi mais freqüente no grupo controle (26,9% versus 57,3%; P<0,001; OR=0,27; 95%CI 0,1–0,4). Nenhuma diferença estatística no polimorfismo dos genes KIR foi encontrada entre a forma difusa e a forma limitada. A combinação KIR2DS2+/KIR2DL2– parece ser um fator de risco para o desenvolvimento da ES enquanto a alta freqüência do gene inibidor KIR2DL2 no grupo controle parece ter uma função protetora. Estes resultados indicam um potencial papel dos genes KIR na patogênese da ES.
Natural killer (NK) cells have an important role in the early responses to viral infections. They kill diverse target cells with decreased or absent expression of major histocompatibility complex (MHC) class I molecules through the Killer Cell Immunoglobulin-Like Receptors (KIR). Many studies have reported association of KIR genes with autoimmune diseases. The objective of this study is to investigate possible associations of KIR polymorphisms with systemic sclerosis (SSc), including the limited (lSSc) and diffuse (dSSc) forms of the disease. The frequency of inhibitory KIR2DL2 was significantly decreased among patients with SSc compared with healthy controls (28.7% versus 65.2; P<0.001, odds ratio [OR] 0.21, 95% confidence interval [95% CI] 0.11–0.38). When activatory and inhibitory KIR genes were analyzed in combination, the concomitant presence of KIR2DS2 and absence of KIR2DL2 (KI2DS2+/KIR2DL2-) phenotype was more frequent in SSc patients than in the control group (26.08% versus 1.75%; P<0.001, OR=19.94, 95%CI [4.78–175.10]). On the other hand, the presence of both KIR2DS2 and KIR2DL2 was more frequent in the control group (26.96% versus 57.39%; P=0.000005, OR=0.27, 95%CI [0.15–0.49]). No significant difference in KIR genes polymorphisms was found between lSSc and dSSc disease subsets. The combination of KIR2DS2+/KIR2DL2– may be a risk factor for development of SSc while the higher frequency of the inhibitory KIR2DL2 gene in the control group suggest to a protective effect. These results indicate a potential role of KIR genes in the SSc pathogenesis.
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Ishida, Yoshihiro. "Killer immunoglobulin-like receptor genotype did not correlate with response to anti-PD-1 antibody treatment in a Japanese cohort." Kyoto University, 2020. http://hdl.handle.net/2433/253207.

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Silva, Pamela Portela da. "Análise de polimorfismos dos genes KIR e HLA classe I em pacientes com câncer colorretal." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2016. http://hdl.handle.net/10183/148088.

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O câncer colorretal (CCR) pode ocorrer em qualquer parte do cólon ou do reto e representa o terceiro câncer mais comum no mundo em ambos os sexos. As células Natural Killer (NK) fazem parte do sistema imune inato reconhecendo moléculas de HLA de classe I em células alvo, através de seus receptores de membrana killer cell immunoglobulin-like receptors (KIR). O objetivo deste estudo foi avaliar a associação entre os genes KIR e os ligantes HLA em pacientes com câncer colorretal e controles saudáveis. Examinamos o polimorfismo de 16 genes KIR e seus ligantes HLA em 154 pacientes caucasóides com CCR e 216 controles saudáveis pela técnica de PCR-SSO e PCR-SSP. Quando comparamos os dois grupos, não foram encontradas diferenças significativas para os ligantes HLA e os genes KIR após correção de Bonferroni. Entretanto, o grupo de genótipos Bx (heterozigoto e homozigoto para o haplótipo B) foi mais frequente nos controles, quando comparados com os pacientes. Estes achados sugerem que altos níveis de ativação de sinais KIR aparecem como proteção para o câncer colorretal.
Colorectal cancer (CRC) can occur anywhere in the colon or rectum and represents the third most common cancer in the world in both sexes. Natural killer cells (NK) are part of the innate immune system recognizing class I HLA molecules on target cells through their membrane receptors, called killer cell immunoglobulin-like receptors (KIR). The aim of our study was to evaluate the association between the KIR genes and HLA ligands in patients with colorectal cancer and healthy controls. We examined the polymorphism of 16 KIR genes and their HLA ligands in 154 caucasoid CRC patients and 216 healthy controls by PCR-SSO and PCR-SSP. When both groups were compared, no significant differences were found for HLA ligands and KIR genes after Bonferroni correction. However, the Bx group genotypes (heterozygous and homozygous for the haplotype B) were more frequent in controls, when compared with patients. These findings suggest that individuals with Bx genotypes could have some protection to colorectal cancer. These findings suggest that higher levels of activating KIR signals appear as protective to colorectal cancer.
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Silva, Pamela Portela da. "Estudo de polimorfismos dos genes KIR e HLA em pacientes com câncer de próstata." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2011. http://hdl.handle.net/10183/35890.

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O câncer de próstata é o segundo câncer mais comum entre homens, uma vez que tanto a incidência como a mortalidade aumentam exponencialmente após a idade de 50 anos. As células Natural Killer (NK) fazem parte do sistema imune inato e reconhecem moléculas de HLA de classe I na célula alvo, através de seus receptores de membrana, chamados killer immunoglobulin-like-receptors (KIR). O objetivo desse estudo foi avaliar a associação entre os genes KIR e HLA em pacientes com câncer de próstata e grupo controle. Genotipamos 200 pacientes com diagnóstico de câncer de próstata e 185 pacientes saudáveis para os genes KIR e HLA classe I por PCR-SSP. Quando comparados os grupos, não foram encontradas diferenças significativas para HLA-C do grupo 1 e do grupo 2, HLA-Bw4, HLA-A3 e A11. Nenhuma diferença foi observada na frequência dos genes KIR nos pacientes com câncer de próstata e nos controles. Esses resultados sugerem que não há potencial papel para o sistema dos genes KIR no câncer de próstata.
Prostate cancer is the second most common cancer among men, since both incidence and mortality exponentially increases in men over fifty years of age. Natural killer cells (NK) are part of the innate immune system recognizing class I HLA molecules on target cells through their membrane receptors, called killer immunoglobulin-like receptors (KIR). The aim of our study was to evaluate the association between the KIR genes and HLA alleles in patients with prostate cancer and healthy controls. Two hundred prostate cancer patients and 185 healthy controls were typed for HLA class I and KIR genes by PCR-SSP. When both groups were compared, no significant differences were found for HLA-C group 1 and group 2, HLA-Bw4, HLA-A3 and A11. No difference was seen either in KIR frequency between patients with prostate cancer and controls. In conclusion, our data suggests no potential role for the KIR gene system in prostate cancer.
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Ichise, Hiroshi. "NK cell alloreactivity against KIR-ligand-mismatched HLA-haploidentical tissue derived from HLA haplotype-homozygous iPSCs." Kyoto University, 2017. http://hdl.handle.net/2433/228232.

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Book chapters on the topic "Killer immunoglobulin like receptors (KIR)"

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Hou, Lihua, Minghua Chen, Noriko Steiner, Kanthi Kariyawasam, Jennifer Ng, and Carolyn K. Hurley. "Killer Cell Immunoglobulin-Like Receptors (KIR) Typing by DNA Sequencing." In Methods in Molecular Biology™, 431–68. Totowa, NJ: Humana Press, 2012. http://dx.doi.org/10.1007/978-1-61779-842-9_25.

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Li, Hongchuan, Paul W. Wright, and Stephen K. Anderson. "Identification and Analysis of Novel Transcripts and Promoters in the Human Killer Cell Immunoglobulin-like Receptor (KIR ) Genes." In Methods in Molecular Biology, 377–91. Totowa, NJ: Humana Press, 2009. http://dx.doi.org/10.1007/978-1-60761-362-6_26.

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Long, Eric O., Deborah N. Burshtyn, Christopher C. Stebbins, and Carsten Watzl. "How do killer cell Ig-like receptors inhibit natural killer cells?" In Activating and Inhibitory Immunoglobulin-like Receptors, 235–41. Tokyo: Springer Japan, 2001. http://dx.doi.org/10.1007/978-4-431-53940-7_29.

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Rajalingam, Raja, Sarah Cooley, and Jeroen van Bergen. "Killer Cell Immunoglobulin-Like Receptors in Clinical Transplantation." In Manual of Molecular and Clinical Laboratory Immunology, 1150–60. Washington, DC, USA: ASM Press, 2016. http://dx.doi.org/10.1128/9781555818722.ch119.

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Wang, Lawrence L., and Wayne M. Yokoyama. "Regulated expression of non-polymorphic gp49 molecules on mouse natural killer cells." In Activating and Inhibitory Immunoglobulin-like Receptors, 25–31. Tokyo: Springer Japan, 2001. http://dx.doi.org/10.1007/978-4-431-53940-7_4.

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Ghansah, Tomar, John M. Ninos, and William G. Kerr. "A role for the SH2-containing inositol phosphatase in the biology of natural killer cells and stem cells." In Activating and Inhibitory Immunoglobulin-like Receptors, 129–40. Tokyo: Springer Japan, 2001. http://dx.doi.org/10.1007/978-4-431-53940-7_17.

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Rajalingam, Raja, and Elham Ashouri. "Gene-Specific PCR Typing of Killer Cell Immunoglobulin-Like Receptors." In Methods in Molecular Biology, 239–55. Totowa, NJ: Humana Press, 2013. http://dx.doi.org/10.1007/978-1-62703-493-7_12.

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Ruggeri, Loredana, Shuhong Zhang, and Sherif S. Farag. "Natural Killer Cell Activity and Killer Immunoglobulin-Like Receptors in Hematopoietic Stem Cell Transplantation." In Cancer Treatment and Research, 47–69. Boston, MA: Springer US, 2008. http://dx.doi.org/10.1007/978-0-387-78580-6_3.

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Pymm, Phillip, and Julian P. Vivian. "Production of Recombinant Killer Immunoglobulin-Like Receptors for Crystallography and Luminex-Based Assays." In Methods in Molecular Biology, 281–99. New York, NY: Springer New York, 2018. http://dx.doi.org/10.1007/978-1-4939-7568-6_22.

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"Killer Immunoglobulin-Like Receptors (KIR)." In Encyclopedia of Signaling Molecules, 1001. New York, NY: Springer New York, 2012. http://dx.doi.org/10.1007/978-1-4419-0461-4_100688.

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Conference papers on the topic "Killer immunoglobulin like receptors (KIR)"

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Chan, Daniel C. F., Zhiyong Zhang, Hong Wang, Xiaomei Sui, Tiffany T. Y. Chan, Natalie Ahn, Joe Phillips, Kathryn Horwitz, Lewis Lanier, and Paul Bunn. "Abstract 3656: Therapeutic effects of anti-KIR antibodies against metastatic cancer cells with aberrant expression of Natural Killer-Cell Immunoglobulin-like Receptors (KIRs)." In Proceedings: AACR 102nd Annual Meeting 2011‐‐ Apr 2‐6, 2011; Orlando, FL. American Association for Cancer Research, 2011. http://dx.doi.org/10.1158/1538-7445.am2011-3656.

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Wang, Enxiu, Liang-Chuan Wang, Ching-Yi Tsai, Vijay Bhoj, Steven Albelda, Edmund Moon, and Michael C. Milone. "Abstract B22: A chimeric antigen receptor (CARs) based upon a killer immunoglobulin-like receptor (KIR) triggers robust cytotoxic activity in solid tumors." In Abstracts: AACR Special Conference: Tumor Immunology and Immunotherapy: A New Chapter; December 1-4, 2014; Orlando, FL. American Association for Cancer Research, 2015. http://dx.doi.org/10.1158/2326-6074.tumimm14-b22.

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Rauf, Khairunnisa Abd, Erry Gumilar Dachlan, and Ariyanto Harsono. "Decidual Killer Immunoglobulin-Like Receptor (KIR)2DL1 Expression and the Onset of Preeclampsia, Birth Weight and Placental Weight in Early and Late Onset Preeclampsia." In 2nd International Conference Postgraduate School. SCITEPRESS - Science and Technology Publications, 2018. http://dx.doi.org/10.5220/0007542103210324.

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Chan, Daniel C., Zhiyong Zhang, Di Zheng, Tiffany Chan, Mary Berg, Kathryn Horwitz, Natalie Ahn, Lewis Lanier, and Paul Bunn. "Abstract 4836: Immune-tolerance due to aberrant expression of Natural Killer-Cell Immunoglobulin-like Receptors (KIRs) on cancer cells and enhanced cancer-platelet interactions." In Proceedings: AACR Annual Meeting 2014; April 5-9, 2014; San Diego, CA. American Association for Cancer Research, 2014. http://dx.doi.org/10.1158/1538-7445.am2014-4836.

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Chan, Daniel C., Zhiyong Zhang, Hong Wang, Xiaomei Sui, Tiffany T. Chan, Natalie Ahn, Lewis L. Lanier, and Paul A. Bunn. "Abstract 1357: Role of Natural Killer-cell Immunoglobulin-like receptors KIR2DL1 and KIR3DL1 in immune resistance." In Proceedings: AACR 101st Annual Meeting 2010‐‐ Apr 17‐21, 2010; Washington, DC. American Association for Cancer Research, 2010. http://dx.doi.org/10.1158/1538-7445.am10-1357.

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Nasef, SI, AM Asker, HH Omar, and HM Hassoba. "SAT0304 Stimulatory and inhibitory killer immunoglobulin-like receptors on natural killer T (NKT) cells in patients with systemic lupus erythematosus (SLE): relation to disease activity." In Annual European Congress of Rheumatology, 14–17 June, 2017. BMJ Publishing Group Ltd and European League Against Rheumatism, 2017. http://dx.doi.org/10.1136/annrheumdis-2017-eular.3920.

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Hagberg, N., D. Leonard, G. Nordmark, and L. Rönnblom. "PS1:16 The presence of autoantibodies to multiple killer cell immunoglobulin-like receptors is associated with nephritis in sle patients." In 11th European Lupus Meeting, Düsseldorf, Germany, 21–24 March 2018, Abstract presentations. Lupus Foundation of America, 2018. http://dx.doi.org/10.1136/lupus-2018-abstract.64.

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Reports on the topic "Killer immunoglobulin like receptors (KIR)"

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Varbanova, Viktoria, Snejina Mihailova, Elissaveta Naumova, and Anastasiya Mihaylova. Distribution of Killer-cell Immunoglobulin-like Receptors (KIR) and their HLA Class I Ligands in the Bulgarian Population. "Prof. Marin Drinov" Publishing House of Bulgarian Academy of Sciences, July 2020. http://dx.doi.org/10.7546/crabs.2020.07.14.

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