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killer cell immunoglobulin

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https://www.readbyqxmd.com/read/28088355/kir-genes-and-hla-class-i-ligands-in-a-caucasian-brazilian-population-with-colorectal-cancer
#1
Pâmela Portela, Joice Merzoni, Juliana D Lindenau, Daniel C Damin, Timothy John Wilson, Rafael Roesler, Gilberto Schwartsmann, Luiz Mariana Fernando Jobim Jobim
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 controls...
January 11, 2017: Human Immunology
https://www.readbyqxmd.com/read/28069185/combination-of-uterine-natural-killer-cell-immunoglobulin-receptor-haplotype-and-trophoblastic-hla-c-ligand-influences-the-risk-of-pregnancy-loss-a-retrospective-cohort-analysis-of-direct-embryo-genotyping-data-from-euploid-transfers
#2
Scott J Morin, Nathan R Treff, Xin Tao, Richard T Scott, Jason M Franasiak, Caroline R Juneau, Marcy Maguire, Richard T Scott
OBJECTIVE: To compare maternal uterine natural killer cell immunoglobulin receptor (KIR) genotype and haplotype frequencies between patients whose euploid single-embryo transfer resulted in pregnancy loss and those that resulted in delivery and to determine if the risk of pregnancy loss was affected by the HLA-C genotype content in the embryo. DESIGN: Retrospective cohort. SETTING: Academic research center. PATIENT(S): Autologous fresh IVF cycles resulting in positive serum β-hCG during 2009-2014...
January 6, 2017: Fertility and Sterility
https://www.readbyqxmd.com/read/28053580/effects-of-soybean-oligosaccharides-on-intestinal-microbial-communities-and-immune-modulation-in-mice
#3
Yan Ma, Xingzhuang Wu, Vigna Giovanni, Xianjun Meng
: Soybean oligosaccharides (SBOSs) are potential prebiotics that may be used to improve immune function. Here, we investigated the effects of intragastric administration of SBOSs in mice to determine the effects on autochthonous intestinal microbial communities and immunological parameters. Results E: After 22-day administration, 4.0 g kg body weight (BW)(-)(1) SBOSs significantly enhanced the proliferation of bifidobacteria and lactic acid bacteria (LAB) as compared to the control...
January 2017: Saudi Journal of Biological Sciences
https://www.readbyqxmd.com/read/28042021/donor-killer-immunoglobulin-like-receptor-haplotype-b-x-induces-severe-acute-graft-versus-host-disease-in-the-presence-of-hla-mismatch-in-t-cell-replete-hematopoietic-cell-transplantation
#4
Ryosuke Hosokai, Masayoshi Masuko, Yasuhiko Shibasaki, Akihiko Saitoh, Tatsuo Furukawa, Chihaya Imai
Natural killer cells have been identified as a mediator of alloimmune reactions in allogeneic hematopoietic stem cell transplantations (HSCTs). Killer immunoglobulin-like receptors (KIRs) are an important determinant of natural killer cell function. The relationship between KIR genotypes/haplotypes and clinical outcomes of allogeneic HSCTs is complex, and inconsistent among several reports. We assessed the clinical impact of KIR haplotype on T-cell replete allogeneic HSCTs performed in a single Japanese center for hematological malignancies (n=106)...
December 29, 2016: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/28012219/incorporation-of-high-dose-131-i-metaiodobenzylguanidine-treatment-into-killer-immunoglobulin-like-receptor-hla-ligand-mismatched-haploidentical-stem-cell-transplantation-for-children-with-neuroblastoma-who-failed-tandem-autologous-stem-cell-transplantation
#5
Ji Won Lee, Eun-Suk Kang, Ki Woong Sung, Eunsang Yi, Soo Hyun Lee, Keon Hee Yoo, Hong Hoe Koo
BACKGROUND: We performed a pilot study (NCT 00793351) to evaluate the effectiveness and feasibility of a strategy incorporating high-dose (131) I-metaiodobenzylguanidine (HD-MIBG) treatment into killer immunoglobulin-like receptor (KIR)/HLA-ligand mismatched haploidentical stem cell transplantation (haplo-SCT) in improving the survival of children with neuroblastoma who failed previous tandem autologous SCT. PROCEDURE: If the patient remained progression free with salvage treatment, HD-MIBG treatment (18 mCi/kg) was given prior to reduced-intensity conditioning (cyclophosphamide + fludarabine + antithymocyte globulin)...
December 24, 2016: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/28011187/mucosal-associated-invariant-t-cells-are-depleted-and-functionally-altered-in-patients-with-common-variable-immunodeficiency
#6
Serena Arduini, Jean Dunne, Niall Conlon, Conleth Feighery, Derek G Doherty
Common variable immunodeficiency (CVID) is a primary immunoglobulin deficiency characterized by recurrent infections and complications, including autoimmunity, enteropathy, polyclonal lymphocytic infiltration or lymphoid malignancy. Innate T cells can support B cell maturation and antibody production. We investigated the numbers, phenotypes and functions of circulating B cell, γδ T cell, invariant natural killer T (iNKT) cell and mucosal-associated invariant T (MAIT) cell subsets in 23 CVID patients and 27 healthy controls...
December 20, 2016: Clinical Immunology: the Official Journal of the Clinical Immunology Society
https://www.readbyqxmd.com/read/28008807/the-role-of-hla-class-i-heavy-chain-interactions-with-killer-cell-immunoglobulin-like-receptors-in-immune-regulation
#7
Simon Kollnberger
HLA-class I molecules form trimeric complexes (pMHC) of peptides, class I heavy chains, and β2microglobulins (β2m) that regulate immune responses by binding to T cells and other immune receptors. B2m-free class I heavy chains (FHCs) form on cells either as a consequence of the natural turnover of pMHC or, in the case of HLA-F, are expressed without β2m. Distinct characteristics of certain HLA-class I members, such as HLA-B27 and HLA-F, stabilize these forms facilitating interactions with immune receptors...
2016: Critical Reviews in Immunology
https://www.readbyqxmd.com/read/27999754/neuroblastoma-patients-with-high-affinity-fcgr2a-3a-and-stimulatory-kir-2ds2-treated-by-long-term-infusion-of-anti-gd2-antibody-ch14-18-cho-show-higher-adcc-levels-and-improved-event-free-survival
#8
Nikolai Siebert, Christian Jensen, Sascha Troschke-Meurer, Maxi Zumpe, Madlen Jüttner, Karoline Ehlert, Silke Kietz, Ina Müller, Holger N Lode
Polymorphisms in Fc-gamma-receptor (FCGR) genes as well as killer cell immunoglobulin-like receptor (KIR) and KIR ligand (KIRL) repertoires may influence antitumor effects of monoclonal antibodies (mAb). Here, we systematically analyzed high- and low-affinity FCGR2A and -3A genotypes as well as stimulating and inhibitory KIR/KIRL combinations in 53 neuroblastoma (NB) patients treated by long-term infusion (LTI) of anti-GD2 IgG1 Ab ch14.18/CHO using validated real-time PCR methods. Patients with high-affinity FCGR2A and -3A genotypes showed a higher level of Ab-dependent cell-mediated cytotoxicity (ADCC) on day 8 after the start of ch14...
2016: Oncoimmunology
https://www.readbyqxmd.com/read/27998801/the-impact-of-kir2ds4-gene-on-clinical-outcome-after-hematopoietic-stem-cell-transplantation
#9
Marija Burek Kamenaric, Katarina Stingl Jankovic, Zorana Grubic, Ranka Serventi Seiwerth, Marija Maskalan, Damir Nemet, Mirta Mikulic, Renata Zunec
Killer cell immunoglobulin-like receptors (KIR) are a family of inhibitory/activating receptors expressed on NK cells. Interactions of KIR receptors with KIR ligands have been shown to modify hematopoietic stem cell transplantation (HSCT) outcome. The aim of this research was to determine the KIR2DS4 allele variants distribution among 111 patients with different hematological malignancy who underwent HSCT and their donors, and to evaluate KIR2DS4 alleles' impact on HSCT outcome. The KIR gene frequency analysis showed a significantly higher incidence of full-length KIR2DS4 alleles among patients...
December 18, 2016: Human Immunology
https://www.readbyqxmd.com/read/27994592/kir-genes-and-their-ligands-predict-the-response-to-anti-egfr-monoclonal-antibodies-in-solid-tumors
#10
Cristina Morales-Estevez, Juan De la Haba-Rodriguez, Barbara Manzanares-Martin, Ignacio Porras-Quintela, Antonio Rodriguez-Ariza, Alberto Moreno-Vega, Maria J Ortiz-Morales, Maria A Gomez-España, Maria T Cano-Osuna, Javier Lopez-Gonzalez, Beatriz Chia-Delgado, Rafael Gonzalez-Fernandez, Enrique Aranda-Aguilar
Killer-cell immunoglobulin-like receptors (KIRs) regulate the killing function of natural killer cells, which play an important role in the antibody-dependent cell-mediated cytotoxicity response exerted by therapeutic monoclonal antibodies (mAbs). However, it is unknown whether the extensive genetic variability of KIR genes and/or their human leukocyte antigen (HLA) ligands might influence the response to these treatments. This study aimed to explore whether the variability in KIR/HLA genes may be associated with the variable response observed to mAbs based anti-epidermal growth factor receptor (EGFR) therapies...
2016: Frontiers in Immunology
https://www.readbyqxmd.com/read/27984624/-progress-in-research-on-genetic-polymorphisms-and-sequence-based-typing-of-kir-genes
#11
Jianxin Zhen, Qiong Yu
Killer cell immunoglobulin-like receptors (KIRs) are members of the immunoglobulin superfamily expressed on natural killer (NK) cells and a subset of T cells. Given the receptor-ligand relationship between certain KIR and human leukocyte antigen (HLA) classⅠmolecules, the KIRs are involved in the regulation of NK cell activation through conveying activating or inhibitory signals, which plays an important role in immunities involved in transplantation, tumor, infection as well as autoimmune diseases. This paper has provided a review for the research on KIR gene polymorphisms and summarized the characteristics of the sequence-based typing method for KIR genes...
December 10, 2016: Zhonghua Yi Xue Yi Chuan Xue za Zhi, Zhonghua Yixue Yichuanxue Zazhi, Chinese Journal of Medical Genetics
https://www.readbyqxmd.com/read/27980216/characterization-of-ifn%C3%AE-producing-natural-killer-cells-induced-by-cytomegalovirus-reactivation-after-haploidentical-hematopoietic-stem-cell-transplantation
#12
Fengyan Jin, Hai Lin, Sujun Gao, Hengxiang Wang, Hongmin Yan, Jinglong Guo, Zheng Hu, Chunhui Jin, Yongqi Wang, Zhidong Wang, Yangzhi Zhao, Yu Liu, Xiaoli Zheng, Yehui Tan, Wei Li, Yun Dai, Yanping Yang
During human cytomegalovirus (CMV) infection after umbilical cord blood or HLA-matched hematopoietic stem cell transplantation (HSCT), a population of NKG2C-expressing natural killer (NK) cells expand and persist. The expanded NK cells express high levels of inhibitory killer immunoglobulin-like receptors (KIR) specific for self-HLA and potently produce IFNγ. However, it remains unknown whether similar events would occur after haploidentical HSCT (haplo-HSCT). Here, we demonstrated that IFNγ-producing NK cells were expanded in haplo-HSCT patients with CMV reactivation...
December 12, 2016: Oncotarget
https://www.readbyqxmd.com/read/27933342/prediction-of-nk-cell-licensing-level-in-selection-of-hematopoietic-stem-cell-donor-initial-results
#13
Marta Rogatko-Koroś, Renata Mika-Witkowska, Katarzyna Bogunia-Kubik, Barbara Wysoczańska, Emilia Jaskuła, Katarzyna Kościńska, Klaudia Nestorowicz, Joanna Dziopa, Urszula Szlendak, Sławomir Gwozdowicz, Elżbieta Graczyk-Pol, Andrzej Lange, Jacek Nowak
Natural killer (NK) cell licensing status depends on clonal expression of inhibitory killer cell immunoglobulin-like receptors (iKIR) and short term HLA environment. Licensed NK cells are more efficient in tumor killing than unlicensed NK cells. Cognate KIR-HLA pairs in hematopoietic stem cell transplant (HSCT) donor and recipient are decisive for the possible change in the NK cell licensing status after HSCT. We assessed clinical outcomes in 297 patients with lymphoproliferative or myeloproliferative malignancies, or myelodysplastic syndrome in a model with upward licensing, downward resetting, and unchanged licensing genetics status after T cell replate HSCT from unrelated donors...
December 8, 2016: Archivum Immunologiae et Therapiae Experimentalis
https://www.readbyqxmd.com/read/27932143/report-from-the-first-and-second-spanish-killer-immunoglobulin-like-receptor-genotyping-workshops-external-quality-control-for-natural-killer-alloreactive-donor-selection-in-haploidentical-stem-cell-transplantation
#14
D Planelles, C Vilches, F González-Escribano, M Muro, R González-Fernández, F Sánchez, J Gonzalo Ocejo, A Eiras, J L Caro, E Palou, J A Campillo, M D de Juan, O Montes, A Balas, L Marín, A Torío, M Fernández-Arquero, C González-Roiz, A López-Vázquez, E Cisneros, C Abad-Molina, R López, M L Abad-Alastruey, C Serra, A M García-Alonso, J L Vicario
An important factor affecting the success in the setting of related haploidentical hematopoietic stem cell transplantation (HSCT) is the graft-versus-leukemia effect mediated by natural killer (NK) cells when the donor displays NK alloreactivity versus the recipient. NK cell function is regulated by killer immunoglobulin-like receptors (KIR) and it has been described that donor KIR genotype influences transplantation outcome. This has led to a requirement of laboratories to have a quality assurance program for validation and control of their KIR genotyping methods...
November 2016: Transplantation Proceedings
https://www.readbyqxmd.com/read/27930093/kir-gene-content-diversity-in-a-zimbabwean-population-does-kir2dl2-have-a-role-in-protection-against-human-immunodeficiency-virus-infection
#15
Kudakwashe Mhandire, Lynn Sodai Zijenah, Louis-Marie Yindom, Kerina Duri, Tommy Mlambo, Mqondisi Tshabalala, Lovemore Ronald Mazengera, Doreen Zvipo Mhandire, Cuthbert Musarurwa, Collet Dandara, Sarah Rowland-Jones, Hilda Tendisa Matarira, Babill Stray-Pedersen
Killer cell immunoglobulin-like receptors (KIRs) mediate natural killer cell function through interaction with their cognate human leukocyte antigen ligands. Thus, KIR gene variants have been implicated in resistance or susceptibility to viral infections. However, research on the role of these variants remains contradictory and inconclusive. In the present study, we investigated KIR gene content diversity and its association with human immunodeficiency virus (HIV) infection in an adult Black Zimbabwean population...
December 2016: Omics: a Journal of Integrative Biology
https://www.readbyqxmd.com/read/27913469/can-we-make-a-better-match-or-mismatch-with-kir-genotyping
#16
Rohtesh S Mehta, Katayoun Rezvani
Natural killer (NK) cell function is regulated by a fine balance between numerous activating and inhibitory receptors, of which killer-cell immunoglobulin-like receptors (KIRs) are among the most polymorphic and comprehensively studied. KIRs allow NK cells to recognize downregulation or the absence of HLA class I molecules on target cells (known as missing-self), a phenomenon that is commonly observed in virally infected cells or cancer cells. Because KIR and HLA genes are located on different chromosomes, in an allogeneic environment such as after hematopoietic stem cell transplantation, donor NK cells that express an inhibitory KIR for an HLA class I molecule that is absent on recipient targets (KIR/KIR-ligand mismatch), can recognize and react to this missing self and mediate cytotoxicity...
December 2, 2016: Hematology—the Education Program of the American Society of Hematology
https://www.readbyqxmd.com/read/27912745/ganoderma-lucidum-beta-1-3-1-6-glucan-as-an-immunomodulator-in-inflammation-induced-by-a-high-cholesterol-diet
#17
Yu-Sheng Wu, Shu-Ying Ho, Fan-Hua Nan, Shiu-Nan Chen
BACKGROUND: Binding of beta 1,3/1,6 glucan of Ganoderma lucidum (G. lucidum) with the receptor results in a series of signal transfers (signalling cascades), which activates the transcription factors for regulating inflammation. Excess cholesterol intake leads to an increase in the distance between fat cells and capillaries, which may cause hypoxia in the fat tissue of obese mice. This hypoxia induces the death of fat cells, resulting in the inflammation of adipose tissue or an increase in the inflammatory gene expression associated with obesity...
December 3, 2016: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/27912146/inosine-acedoben-dimepranol-promotes-an-early-and-sustained-increase-in-the-natural-killer-cell-component-of-circulating-lymphocytes-a-clinical-trial-supporting-anti-viral-indications
#18
S Rumel Ahmed, Amy S Newman, James O'Daly, Sean Duffy, Gillian Grafton, Catherine A Brady, S John Curnow, Nicholas M Barnes, John Gordon
Inosine Acedoben Dimepranol (IAD), licensed for the treatment of cell-mediated immune deficiencies associated with viral infections, has been reported to impact a variety of immune parameters both in vitro and in vivo. Here we report the results from a clinical trial where multiple lymphocyte subsets - CD19+ B cells, CD3+ T cells, CD4+ T-helper cells, FoxP3(hi)/CD25(hi)/CD127(lo) regulatory T cells (Tregs), CD3-/CD56+ NK cells, and CD3+/CD56+ NKT cells - were, together with serum immunoglobulins and IgG subclasses, followed during 14days of IAD administration to ten healthy volunteers; these selected from 27 individuals pre-screened in vitro for their capacity to respond to IAD as gauged by increases in the percentage of Treg and/or NKT cells arising in PHA-stimulated cultures...
January 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/27906005/the-role-of-nk-cells-in-hiv-1-protection-autologous-allogeneic-or-both
#19
REVIEW
Jef Hens, Wim Jennes, Luc Kestens
Natural killer (NK) cells specialize in killing virally infected- or tumor cells and are part of the innate immune system. The activational state of NK cells is determined by the balance of incoming activating and inhibitory signals mediated by receptor-ligand binding with the target cell. These receptor-ligand bonds mainly consist of the killer immunoglobulin-like receptors (KIR), which are expressed at the cell surface of NK cells, and their ligands: the highly variable human leukocyte antigen -class I molecules (HLA)...
March 18, 2016: AIDS Research and Therapy
https://www.readbyqxmd.com/read/27894857/cytokine-induced-memory-like-differentiation-enhances-unlicensed-natural-killer-cell-antileukemia-and-fc%C3%AE-riiia-triggered-responses
#20
Julia A Wagner, Melissa M Berrien-Elliott, Maximillian Rosario, Jeffrey W Leong, Brea A Jewell, Timothy Schappe, Sara Abdel-Latif, Todd A Fehniger
Cytokine-induced memory-like natural killer (NK) cells differentiate after short-term preactivation with IL-12, IL-15, and IL-18 and display enhanced effector function in response to cytokines or tumor targets for weeks after the initial preactivation. Conventional NK cell function depends on a licensing signal, classically delivered by an inhibitory receptor engaging its cognate MHC class I ligand. How licensing status integrates with cytokine-induced memory-like NK cell responses is unknown. We investigated this interaction using killer cell immunoglobulin-like receptor- and HLA-genotyped primary human NK cells...
November 25, 2016: Biology of Blood and Marrow Transplantation
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