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https://www.readbyqxmd.com/read/29149205/kir-content-genotypes-associate-with-carriage-of-hepatitis-b-surface-antigen-e-antigen-and-hbv-viral-load-in-gambians
#1
Louis-Marie Yindom, Maimuna Mendy, Christopher Bodimeade, Caroline Chambion, Peter Aka, Hilton C Whittle, Sarah L Rowland-Jones, Robert Walton
BACKGROUND: Hepatocellular carcinoma (HCC) causes over 800,000 deaths worldwide annually, mainly in low income countries, and incidence is rising rapidly in the developed world with the spread of hepatitis B (HBV) and C (HCV) viruses. Natural Killer (NK) cells protect against viral infections and tumours by killing abnormal cells recognised by Killer-cell Immunoglobulin-like Receptors (KIR). Thus genes and haplotypes encoding these receptors may be important in determining both outcome of initial hepatitis infection and subsequent chronic liver disease and tumour formation...
2017: PloS One
https://www.readbyqxmd.com/read/29141453/relationship-between-metabolic-syndrome-and-nodular-thyroid-diseases
#2
Seher Kir, Yusuf Aydin, Hulya Coskun
Nodular thyroid diseases are common in Turkey. Insulin resistance (IR) is considered as the most important component of metabolic syndrome (MetS), and it is thought to directly affect thyroid diseases, together with other components of MetS. The aim of this study was to evaluate potential factors associated with thyroid nodularity. This study was part of the prospective MELEN study. In total, randomly selected 2233 subjects were evaluated. A euthyroid subgroup of participants (n = 1432) was selected and 421 of them had MetS...
November 16, 2017: Scandinavian Journal of Clinical and Laboratory Investigation
https://www.readbyqxmd.com/read/29138222/decitabine-enhances-targeting-of-aml-cells-by-cd34-progenitor-derived-nk-cells-in-nod-scid-il2rg-null-mice
#3
Jeannette Cany, Mieke W H Roeven, Janneke S Hoogstad-van Evert, Willemijn Hobo, Frans Maas, Rosalia Franco Fernandez, Nicole M A Blijlevens, Walter J van der Velden, Gerwin Huls, Joop H Jansen, Nicolaas P M Schaap, Harry Dolstra
Combining NK cell adoptive transfer with hypomethylating agents (HMA) is an attractive therapeutic approach for patients with acute myeloid leukemia (AML). However, data regarding the impact of HMA on NK cell functionality are mostly derived from in vitro studies with high non-clinical relevant drug concentrations. Here, we report a comparative study of azacitidine and decitabine in combination with allogeneic NK cells generated from CD34(+) hematopoietic stem and progenitor cells (HSPC-NK cells) in in vitro and in vivo AML models...
November 14, 2017: Blood
https://www.readbyqxmd.com/read/29136290/the-role-of-ca-2-dependent-k-channels-at-the-rat-corticostriatal-synapses-revealed-by-paired-pulse-stimulation
#4
Angel A Robles G, Ana V Vega, Carolina Gonzalez-Sandoval, Jaime Barral
Potassium channels play an important role in modulating synaptic activity both at presynaptic and postsynaptic levels. We have shown before that presynaptically located KV and KIR channels modulate the strength of corticostriatal synapses in rat brain, but the role of other types of potassium channels at these synapses remains largely unknown. Here we show that calcium-dependent potassium channels BK-type but not SK-type channels are located presynaptically in corticostriatal synapses. We stimulated cortical neurons in rat brain slices and recorded postsynaptic excitatory potentials (EPSP) in medium spiny neurons (MSN) in dorsal neostriatum...
November 14, 2017: Synapse
https://www.readbyqxmd.com/read/29129607/polymorphisms-in-hla-c-and-kir-alleles-are-not-associated-with-ham-tsp-risk-in-htlv-1-infected-subjects
#5
Tatiane Assone, Fernanda M Malta, Sonia Bakkour, Leilani Montalvo, Arthur M Paiva, Jerusa Smid, Augusto César Penalva de Oliveira, Fernanda de Toledo Gonçalves, Olinda do Carmo Luiz, Luiz Augusto M Fonseca, Philip J Norris, Jorge Casseb
INTRODUCTION: Several genetic polymorphisms may be related to susceptibility or resistance to viral disease outcomes. Immunological or genetic factors may act as major triggers of the immune pathogenesis of HAM/TSP. This study investigated the association of immune related genetic polymorphisms with viral and immunological markers. METHODS: 247 HTLV-1-infected volunteers, drawn from a larger group of HTLV-infected subjects followed at the Institute of Infectious Diseases "Emilio Ribas" (IIER) for up to 19 years, participated in this study, which ran from June 2011 to July 2016...
November 10, 2017: Virus Research
https://www.readbyqxmd.com/read/29122934/genotyping-natural-killer-immune-checkpoints%C3%A2-to-discover-biomarkers-of-response
#6
Nai-Kong V Cheung, Katharine C Hsu
Immune checkpoints have been a focus of immunotherapy in the recent decade. Killer-cell immunoglobulin-like receptors (KIR) and their cognate human leukocyte antigen (HLA) class I ligands have evolved as checkpoints to ensure self-tolerance of natural iiller (NK) cells. Both KIR and HLA genetic profiles are potential biomarkers of immunotherapy outcome.
November 9, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/29115510/hgf-induces-the-serine%C3%A2-phosphorylation-and-cell-surface-translocation-of-romk-kir-1-1-channels-in-rat-kidney-cells
#7
Takashi Kato, Kiyomasa Oka, Toshikazu Nakamura
Extracellular potassium homeostasis is dependent on the activity of potassium channels, which are expressed on the apical membrane of epithelial tubular cells. The renal outer medullary potassium channel (ROMK) is considered to be the major route for potassium transport into the tubule lumen. Hepatocyte growth factor (HGF) exerts multiple biological activities and is important for maintaining renal homeostasis. It is also anti‑apoptotic and mitogenic for protection and recovery from ARF. Whether HGF regulates the ion channel activities remains to be elucidated, therefore, the present study aimed to investigate the modulation of HGF on the expression of ROMK in cultured renal tubular cells...
November 6, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29111138/kir-like-activating-natural-killer-cell-receptors-and-their-association-with-complicated-malaria-in-north-india
#8
Swayam Prakash, Prabhat Ranjan, Ujjala Ghoshal, Suraksha Agrawal
Killer immunoglobulin-like receptors (KIRs) genomic regions have been suggested to influence malaria pathogenesis and infection susceptibility. KIRs are known as activating natural killer (NK) cell receptors, which upon binding to their corresponding human leukocyte antigen (HLA) ligands cause lysis of any infected cell. We have examined the potential association of KIR genes with complicated malaria (CM) among north Indians in this study and further evaluated the KIR receptor-HLA ligand association on the severity of the disease considering the uncomplicated malaria (UCM) subjects as control...
October 27, 2017: Acta Tropica
https://www.readbyqxmd.com/read/29105756/kir-downregulation-by-il-12-15-18-unleashes-human-nk-cells-from-kir-hla-i-inhibition-and-enhances-killing-of-tumor-cells
#9
Eva-Maria Ewen, Jens H W Pahl, Matthias Miller, Carsten Watzl, Adelheid Cerwenka
To exploit autologous NK cells for cancer immunotherapy, it is highly relevant to circumvent killer cell immunoglobulin-like receptor (KIR)-mediated self-inhibition of human NK cells by HLA-I-expressing tumor cells. Here, we show that stimulation of NK cells with IL-12/15/18 for two days leads to downregulation of surface expression of the inhibitory KIR2DL2/L3, KIR2DL1 and KIR3DL1 receptors on peripheral blood NK cells. Downregulation of KIR expression was attributed to decreased KIR mRNA levels which could be re-induced already 3 days after re-culture in IL-2...
November 6, 2017: European Journal of Immunology
https://www.readbyqxmd.com/read/29105364/association-between-killer-cell-immunoglobulin-like-receptor-2ds5-gene-with-essential-hypertension-in-the-chinese-han-patients
#10
A L Wang, B Jiang, X Y Qian, Q Zhang, H Peng, Y H Zhang
Hypertension has been suggested to be mediated by immunity and inflammation. As immune system genes, killer cell immunoglobulin-like receptors (KIRs) genes play an important role in the pathogenesis of autoimmune diseases. We conducted a community population-based case-control study to analyse associations between KIR genes and hypertension. KIR genes were genotyped using sequence-specific primer polymerase chain reaction in 380 unrelated essential hypertensives and 527 normotensives. The frequencies of KIR2DS5 gene were significantly decreased in participants with high high-sensitivity C-reactive protein (hsCRP) compared with participants with low hsCRP (17...
November 3, 2017: International Journal of Immunogenetics
https://www.readbyqxmd.com/read/29101448/discovery-of-gorilla-mhc-c-expressing-c1-ligand-for-kir
#11
Jörg B Hans, Linda Vigilant
In comparison to humans and chimpanzees, gorillas show low diversity at MHC class I genes (Gogo), as reflected by an overall reduced level of allelic variation as well as the absence of a functionally important sequence motif that interacts with killer cell immunoglobulin-like receptors (KIR). Here, we use recently generated large-scale genomic sequence data for a reassessment of allelic diversity at Gogo-C, the gorilla orthologue of HLA-C. Through the combination of long-range amplifications and long-read sequencing technology, we obtained, among the 35 gorillas reanalyzed, three novel full-length genomic sequences including a coding region sequence that has not been previously described...
November 3, 2017: Immunogenetics
https://www.readbyqxmd.com/read/29100942/association-between-kir-genes-and-dust-mite-sensitization-in-a-brazilian-population
#12
Marcela Caleffi da Costa Lima Caniatti, Sueli Donizete Borelli, Ana Lúcia Falavigna Guilherme, Soraya Barrionuevo Franzener, Luiza Tamie Tsuneto
BACKGROUND: Killer cell immunoglobulin-like receptors (KIRs), found on the surface of natural killer (NK) cells, play a key role in controlling the innate response. Such response depends on a series of cellular interactions between these receptors and HLA activating/inhibiting ligands. Atopic diseases have been associated with genes that regulate cytokine production and HLA genes, which may either protect or predispose to hypersensitivity. OBJECTIVE: To verify an association study of KIR genes with sensitization to the following mites: Dermatophagoides farinae, Dermatophagoides pteronyssinus, and Blomia tropicalis...
October 31, 2017: Human Immunology
https://www.readbyqxmd.com/read/29099970/expression-of-kir2ds1-does-not-significantly-contribute-to-nk-cell-cytotoxicity-in-hla-c1-c2-heterozygous-haplotype-b-donors
#13
Karla Baltner, Ayline Kübler, Marina Pal, Monika Balvociute, Markus Mezger, Rupert Handgretinger, Maya C André
NK cells are functionally controlled by the killer immunoglobulin-like receptor (KIR) family that comprises inhibitory (iKIR) and activating (aKIR) members. Genetic association studies suggest that donors expressing aKIRs next to iKIRs will be superior donors in the setting of hematopoietic stem cell transplantation of patients with leukemia. However, contrary evidence states that aKIR expression may be irrelevant or even detrimental. Using a complex methodology incorporating KIR-Q-PCR, double fluorescence and viSNE analysis, we characterized subset distribution patterns and functionality in haplotype A donors which lack aKIRs and haplotype B donors that express a variety of B-specific genes...
November 1, 2017: International Immunology
https://www.readbyqxmd.com/read/29097997/the-more-the-better-do-the-right-thing-for-natural-killer-immunotherapy-in-acute-myeloid-leukemia
#14
REVIEW
Sarah Parisi, Mariangela Lecciso, Darina Ocadlikova, Valentina Salvestrini, Marilena Ciciarello, Dorian Forte, Giulia Corradi, Michele Cavo, Antonio Curti
Natural killer (NK) cells are circulating CD3(-) lymphocytes, which express CD56 or CD16 and an array of inhibitory receptors, called killer-immunoglobulin-like receptors (KIRs). Alloreactive KIR-ligand mismatched NK cells crucially mediate the innate immune response and have a well-recognized antitumor activity. Adoptive immunotherapy with alloreactive NK cells determined promising clinical results in terms of response in acute myeloid leukemia (AML) patients and several data demonstrated that response can be influenced by the composition of NK graft...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29078989/an-historical-approach-to-the-genetic-distribution-of-kir-and-hla-ligands-in-eastern-sicilians-compared-to-modern-descendants-of-their-invaders
#15
Cristina Capittini, Francesco Messina, Fabrizio Puglisi, Maria Azzaro, Sebastiana Toscano, Annalisa De Silvestri, Carmine Tinelli, Grazia Sortino
A geographical stratification of Killer Immunoglobulin-like Receptors (KIR) has been reported worldwide. We first analyzed the distribution of 15 KIR genes in a sample of 50 East-Sicilians (ES). We used a Principal Component Analysis (PCA) to compare the KIR genetic content among ES and 10 modern populations who are descendants of the ancient invaders of Sicily: Spanish, French, Norwegians, Swedes, Finns, Tunisians, Moroccans, Arabs, Greeks, Turks. We also included a sample of Sardinians, and Senegalese (as outliner group)...
October 24, 2017: Human Immunology
https://www.readbyqxmd.com/read/29075265/kir3ds1-hla-b-bw4-80ile-genotype-is-correlated-with-the-ifn-%C3%AE-therapy-response-in-hepatitis-b-e-antigen-positive-chronic-hepatitis-b
#16
Wenting Li, Xiaokun Shen, Binqing Fu, Chuang Guo, Yanyan Liu, Ying Ye, Rui Sun, Jiabin Li, Zhigang Tian, Haiming Wei
To date, several on-treatment-level virological and serological indices that may predict the response to interferon alpha (IFN-α) have been reported. However, no effective predictors, such as drug-response genes, that can be detected before administration of anti-hepatitis B virus (HBV) therapy with IFN-α, have been found. In the diverse range of chronic viral infection, genes that affect human immunity play important roles in understanding host and viral co-evolution. Killer-cell immunoglobulin-like receptors (KIRs), which are highly polymorphic at the allele and haplotype levels, participate in the antiviral function of natural killer (NK) cells via fine-tuning inhibition and activation of NK-cell responses that occur when the NK cells interact with human leukocyte antigen (HLA) class I molecules on target cells...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29070683/stability-and-expression-levels-of-hla-c-on-the-cell-membrane-modulate-hiv-1-infectivity
#17
Francesca Parolini, Priscilla Biswas, Michela Serena, Francesca Sironi, Valentina Muraro, Elisabetta Guizzardi, Lucia Cazzoletti, Maria Teresa Scupoli, Davide Gibellini, Elisabetta Ugolotti, Roberto Biassoni, Alberto Beretta, Mauro Malnati, Maria Grazia Romanelli, Donato Zipeto
HLA-C expression is associated with a differential ability to control HIV-1 infection. Higher HLA-C levels may lead to a better control of HIV-1 infection through both a higher efficiency of antigen presentation to cytotoxic T lymphocytes (CTLs), as well as the triggering of activating Killer Immunoglobulin like receptors (KIR) on NK-cells, whereas lower levels may provide a poor HIV-1 control and a rapid progression toward AIDS.We characterized the relative amount of HLA-C heterotrimers (heavy chain/β2m/peptide) and HLA-C free heavy chains on PBMC from healthy blood donors harboring both alleles with stable or unstable binding to β2m/peptide...
October 25, 2017: Journal of Virology
https://www.readbyqxmd.com/read/29067686/association-between-gm-hla-and-killer-immunoglobulin-like-receptors-and-the-natural-course-of-hcmv-infection-a-pilot-study-performed-in-sicilian-population
#18
Danilo Di Bona, Giulia Accardi, Anna Aiello, Massimo Bilancia, Giuseppina Candore, Claudia Colomba, Calogero Caruso, Giovanni Duro, Caterina M Gambino, Luigi Macchia, Janardan P Pandey
Natural killer (NK) cells provide a major defence against cytomegalovirus (HCMV) infection through the interaction of their surface receptors, including the activating and inhibitory killer immunoglobulin-like receptors (KIRs), and human leukocyte antigens (HLA) class I molecules. Also GM allotypes, able to influence the NK antibody-dependent cell-mediated cytotoxicity (ADCC), appear to be involved in the immunological control of virus infections, including HCMV. In some cases, their contribution requires epistatic interaction with other genes of the immune system, such as HLA...
October 25, 2017: Immunology
https://www.readbyqxmd.com/read/29066292/rem2-signaling-affects-neuronal-structure-and-function-in-part-by-regulation-of-gene-expression
#19
Katelyn Kenny, Leandro Royer, Anna R Moore, Xiao Chen, Michael T Marr, Suzanne Paradis
The central nervous system has the remarkable ability to convert changes in the environment in the form of sensory experience into long-term alterations in synaptic connections and dendritic arborization, in part through changes in gene expression. Surprisingly, the molecular mechanisms that translate neuronal activity into changes in neuronal connectivity and morphology remain elusive. Rem2, a member of the Rad/Rem/Rem2/Gem/Kir (RGK) subfamily of small Ras-like GTPases, is a positive regulator of synapse formation and negative regulator of dendritic arborization...
October 21, 2017: Molecular and Cellular Neurosciences
https://www.readbyqxmd.com/read/29066026/cd4-cd28-kir-cd11a-hi-t-cells-correlate-with-disease-activity-and-are-characterized-by-a-pro-inflammatory-epigenetic-and-transcriptional-profile-in-lupus-patients
#20
Elizabeth Gensterblum, Paul Renauer, Patrick Coit, Faith M Strickland, Nathan C Kilian, Shaylynn Miller, Mikhail Ognenovski, Jonathan D Wren, Pei-Suen Tsou, Emily E Lewis, Kathleen Maksimowicz-McKinnon, W Joseph McCune, Bruce C Richardson, Amr H Sawalha
OBJECTIVE: The goal of this study was to comprehensively characterize CD4+CD28+ T cells overexpressing CD11a and KIR genes, and examine the relationship between this T cell subset, genetic risk, and disease activity in lupus. METHODS: The size of the CD4+CD28+KIR+CD11a(hi) T cell subset was determined by flow cytometry, and total genetic risk for lupus was calculated in 105 female patients using 43 confirmed genetic susceptibility loci. Primary CD4+CD28+KIR+CD11a(hi) T cells were isolated from lupus patients or were induced from healthy individuals using 5-azacytidine...
October 20, 2017: Journal of Autoimmunity
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