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https://www.readbyqxmd.com/read/28529568/a-different-representation-of-natural-t-cells-and-natural-killer-cells-between-tumor-infiltrating-and-periphery-lymphocytes-in-human-hepatocellular-carcinoma
#1
Xiao-Feng Li, Dong Dai, Xiu-Yu Song, Jian-Jing Liu, Lei Zhu, Xiang Zhu, Wenchao Ma, Wengui Xu
Natural T cells [cluster of differentiation (CD) 3(+)CD56(+)] and natural killer (NK) cells (CD3(-)CD56(+)) are particularly abundant in the human liver and serve an important role in immune responses in the liver. The aim of the present study was to extensively determine the phenotypic and functional characteristics of natural T and NK cells in human hepatocellular carcinoma (HCC). Tumorous and non-tumorous tissue infiltrating lymphocytes (TILs and NILs, respectively) and peripheral blood mononuclear cells (PBMCs) from patients with hepatocellular carcinoma (HCC) were obtained to determine the frequency and phenotype of natural T/NK cells by a multicolor fluorescence activated cell sorting analysis...
May 2017: Oncology Letters
https://www.readbyqxmd.com/read/28529313/impact-of-killer-immunoglobulin-like-receptor-and-human-leukocyte-antigen-genotypes-on-the-efficacy-of-immunotherapy-in-acute-myeloid-leukemia
#2
E Bernson, A Hallner, F E Sander, O Wilsson, O Werlenius, A Rydström, R Kiffin, M Brune, R Foà, J Aurelius, A Martner, K Hellstrand, F B Thorén
Interactions between killer-immunoglobulin-like receptors (KIRs) and their HLA class I ligands are instrumental in natural killer (NK) cell regulation and protect normal tissue from NK cell attack. Human KIR haplotypes comprise genes encoding mainly inhibitory receptors (KIR A) or activating and inhibitory receptors (KIR B). A substantial fraction of humans lack ligands for inhibitory KIRs (iKIRs), i.e. a 'missing ligand' genotype. KIR B/x and missing ligand genotypes may thus give rise to potentially autoreactive, unlicensed NK cells...
May 22, 2017: Leukemia: Official Journal of the Leukemia Society of America, Leukemia Research Fund, U.K
https://www.readbyqxmd.com/read/28528709/association-between-the-killer-cell-immunoglobulin-like-receptor-a-haplotype-and-childhood-acute-lymphoblastic-leukemia
#3
Awad E Osman, Abdullah Aljuryan, Hanan Al-Harthi, Mai Almeshari
Killer immunoglobulin-like receptors (KIRs) have the ability to regulate Natural killer (NK) cell function through inhibition/activation mechanisms. Healthy human cells express HLA class I ligands on their surface, which are recognized by NK cells to avoid spontaneous cell destruction. The associations of KIRs and/or HLA class 1 ligands in leukemic patients have been studied in some populations, with some of these studies demonstrating an association of specific types with leukemia. KIRs and their corresponding HLA class 1 ligands were investigated in Saudi patients with ALL and AML and compared to healthy controls...
May 18, 2017: Human Immunology
https://www.readbyqxmd.com/read/28526557/the-frog-skin-host-defense-peptide-frenatin-2-1s-enhances-recruitment-activation-and-tumoricidal-capacity-of-nk-cells
#4
Jelena M Pantic, Ivan P Jovanovic, Gordana D Radosavljevic, Nevena M Gajovic, Nebojsa N Arsenijevic, J Michael Conlon, Miodrag L Lukic
Frog skin is a source of peptides with various biological properties. Frenatin 2.1S, derived from norepinephrine-stimulated skin secretions of the Orinoco lime tree frog Sphaenorhynchus lacteus, exhibits immunostimulatory effects as demonstrated by the promotion of proinflammatory phenotypes of mononuclear cells in mouse peritoneal cavity and spleen. The aim of this study was to identify the populations of host cells sensitive to the action of frenatin 2.1S in vivo and to study its effects on their functional antitumor capacity...
May 16, 2017: Peptides
https://www.readbyqxmd.com/read/28525888/combination-of-desi2-and-ip10-gene-therapy-significantly-improves-therapeutic-efficacy-against-murine-carcinoma
#5
Chao Lin, HuaYing Yan, Jun Yang, Lei Li, Mei Tang, Xinyu Zhao, Chunlai Nie, Na Luo, Yuquan Wei, Zhu Yuan
DESI2 (also known as PNAS-4) is a novel pro-apoptotic gene activated during the early response to DNA damage. We previously reported that overexpression of DESI2 induces S phase arrest and apoptosis by activating checkpoint kinases. The present study was designed to test whether combination of DESI2 and IP10 could improve the therapy efficacy in vitro and in vivo. The recombinant plasmid co-expressing DESI2 and IP10 was encapsulated with DOTAP/Cholesterol nanoparticle. Immunocompetent mice bearing CT26 colon carcinoma and LL2 lung cancer were treated with the complex...
May 5, 2017: Oncotarget
https://www.readbyqxmd.com/read/28523761/unraveling-the-expression-of-microrna-27a-nkg2d-in-peripheral-blood-mononuclear-cells-and-natural-killer-cells-of-pediatric-systemic-lupus-erythematosus-patients
#6
Shady K Sourour, Heba R Aboelenein, Noha M Elemam, Amira K Abdelhamid, Samia Salah, Ahmed I Abdelaziz
BACKGROUND AND AIM: The activity of natural killer (NK) cells is known to be decreased in systemic lupus erythematosus (SLE) patients. Nevertheless, the exact contribution of NK cells in the pathogenesis of SLE is still inconclusive. MicroRNAs (miRNAs), are small noncoding RNA molecules that play a fundamental role in regulating NK cell function. The objective of this study was to investigate the expression of miRNAs that might potentially target an essential activating receptor, NKG2D in peripheral blood mononuclear cells (PBMCs) and NK cells of SLE patients...
May 19, 2017: International Journal of Rheumatic Diseases
https://www.readbyqxmd.com/read/28522391/polysaccharides-from-ginseng-leaves-inhibit-tumor-metastasis-via-macrophage-and-nk-cell-activation
#7
Myoung-Sook Shin, Su-Hyun Hwang, Taek-Joon Yoon, Kwang-Soon Shin
In this study, we purified the polysaccharide fraction (GS-P) from the leaves of Panax ginseng C.A. Meyer and analyzed its monosaccharide composition and antitumor and antimetastatic activity in vitro and in vivo. GS-P is a 10.2kDa pectic polysaccharide consisting of 15 different monosaccharides. GS-P treatment significantly inhibited metastasis in mice, in a dose-dependent manner. GS-P was not cytotoxic to colon 26-M3.1 cells and increased mouse splenocyte proliferation. Secretion of tumor necrosis factor (TNF)-α and interleukin (IL)-12 was enhanced in the peritoneal exudate macrophages (PEMs) of GS-P-treated mice...
May 15, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28520526/kir3dl1-hl-a-b-subtypes-govern-acute-myelogenous-leukemia-relapse-after-hematopoietic-cell-transplantation
#8
Jeanette E Boudreau, Fabio Giglio, Ted A Gooley, Philip A Stevenson, Jean-Benoît Le Luduec, Brian C Shaffer, Raja Rajalingam, Lihua Hou, Carolyn Katovich Hurley, Harriet Noreen, Elaine F Reed, Neng Yu, Cynthia Vierra-Green, Michael Haagenson, Mari Malkki, Effie W Petersdorf, Stephen Spellman, Katharine C Hsu
Purpose Disease relapse remains a major challenge to successful outcomes in patients who undergo allogeneic hematopoietic cell transplantation (HCT). Donor natural killer (NK) cell alloreactivity in HCT can control leukemic relapse, but capturing alloreactivity in HLA-matched HCT has been elusive. HLA expression on leukemia cells-upregulated in the post-HCT environment-signals for NK cell inhibition via inhibitory killer immunoglobulin-like (KIR) receptors and interrupts their antitumor activity. We hypothesized that varied strengths of inhibition among subtypes of the ubiquitous KIR3DL1 and its cognate ligand, HLA-B, would titrate NK reactivity against acute myelogenous leukemia (AML)...
May 18, 2017: Journal of Clinical Oncology: Official Journal of the American Society of Clinical Oncology
https://www.readbyqxmd.com/read/28520183/infected-malnourished-children-displayed-changes-in-early-activation-and-lymphocyte-subpopulations
#9
Oralia Nájera-Medina, Fernando Valencia-Chavarría, Consuelo Cortés-Bejar, Monika Palacios-Martínez, C Paulina Rodríguez-López, María Cristina González-Torres
AIM: Malnutrition and infections cause immunological changes in lymphocyte subpopulations and their functionality. We evaluated the activation capacity of lymphocytes and memory cells in 10 well nourished, seven well nourished infected and eight malnourished infected children before and after treatment. METHODS: All the children were patients in Mexico City and were less than three years of age. The expression of various cluster of differentiation (CD) cells were assessed by flow cytometry: CD45RA (naïve) and CD45RO (memory) antigens on CD4 lymphocytes and CD69 in all lymphocytes...
May 18, 2017: Acta Paediatrica
https://www.readbyqxmd.com/read/28518215/the-tlr9-signaling-pathway-regulates-mr1-mediated-bacterial-antigen-presentation-in-b-cells
#10
Jianyun Liu, Randy R Brutkiewicz
Mucosal-associated invariant T (MAIT) cells are conserved T cells that express a semi-invariant TCR (Vα7.2 in humans and Vα19 in mice). The development of MAIT cells requires the antigen (Ag) presenting MHC-related protein 1 (MR1), as well as commensal bacteria. The mechanisms that regulate the functional expression of MR1 molecules and their loading with bacterial Ag in APCs are largely unknown. We have found that treating B cells with the TLR9 agonist CpG increases MR1 surface expression. Interestingly, activation of TLR9 by CpG-A (but not CpG-B) enhances MR1 surface expression...
May 18, 2017: Immunology
https://www.readbyqxmd.com/read/28515356/licensing-delineates-helper-and-effector-nk-cell-subsets-during-viral-infection
#11
Anthony E Zamora, Ethan G Aguilar, Can M Sungur, Lam T Khuat, Cordelia Dunai, G Raymond Lochhead, Juan Du, Claire Pomeroy, Bruce R Blazar, Dan L Longo, Jeffrey M Venstrom, Nicole Baumgarth, William J Murphy
Natural killer (NK) cells can be divided into phenotypic subsets based on expression of receptors that bind self-MHC-I molecules, a concept termed licensing or education. Here we show NK cell subsets with different migratory, effector, and immunoregulatory functions in dendritic cell and antigen (ag)-specific CD8+ T cell responses during influenza and murine cytomegalovirus infections. Shortly after infection, unlicensed NK cells localized in draining lymph nodes and produced GM-CSF, which correlated with the expansion and activation of dendritic cells, and resulted in greater and sustained ag-specific T cell responses...
May 18, 2017: JCI Insight
https://www.readbyqxmd.com/read/28515346/the-novel-complex-combination-of-alum-cpg-odn-and-hh2-as-adjuvant-in-cancer-vaccine-effectively-suppresses-tumor-growth-in-vivo
#12
Yaomei Tian, Meng Li, Chaoheng Yu, Rui Zhang, Xueyan Zhang, Rong Huang, Lian Lu, Fengjiao Yuan, Yingzi Fan, Bailing Zhou, Ke Men, Heng Xu, Li Yang
Single-component adjuvant is prone to eliciting a specific type of Th1 or Th2 response. So, the development of combinatorial adjuvants inducing a robust mixed Th1/Th2 response is a promising vaccination strategy against cancer. Here, we describe a novel combination of aluminum salts (alum), CpG oligodeoxynucleotide (CpG) and innate defense regulator peptide HH2 for improving anti-tumor immune responses. The CpG-HH2 complex significantly enhanced the production of IFN-γ, TNF-α and IL-1β, promoted the uptake of antigen and strengthened the activation of p38, Erk1/2 and NF-κB in vitro, compared to CpG or HH2 alone...
April 28, 2017: Oncotarget
https://www.readbyqxmd.com/read/28513593/jak3-deficiency-blocks-innate-lymphoid-cell-development
#13
M L Robinette, M Cella, J B Telliez, T K Ulland, A D Barrow, K Capuder, S Gilfillan, L-L Lin, L D Notarangelo, M Colonna
Loss-of-function mutations in the tyrosine kinase JAK3 cause autosomal recessive severe combined immunodeficiency (SCID). Defects in this form of SCID are restricted to the immune system, which led to the development of immunosuppressive JAK inhibitors. We find that the B6.Cg-Nr1d1(tm1Ven)/LazJ mouse line purchased from Jackson Laboratories harbors a spontaneous mutation in Jak3, generating a SCID phenotype and an inability to generate antigen-independent professional cytokine-producing innate lymphoid cells (ILCs)...
May 17, 2017: Mucosal Immunology
https://www.readbyqxmd.com/read/28513532/natural-killer-cells-response-to-il-2-stimulation-is-distinct-between-ascites-with-the-presence-or-absence-of-malignant-cells-in-ovarian-cancer-patients
#14
Rodrigo Fernandes da Silva, Adriana Yoshida, Daniela Maira Cardozo, Rodrigo Menezes Jales, Silke Paust, Sophie Derchain, Fernando Guimarães
Peritoneal ascites are a distinguishable feature of patients with advanced epithelial ovarian cancer (EOC). The presence of different lymphocyte subsets has been reported in EOC-associated ascites, which also can or not contain malignant cells. The goal of this study was to analyze the functional characteristics of natural killer (NK) cells from EOC-associated ascites in terms of their expression of activating receptors and ascites' contents of lymphocyte subtypes, cytokine profile and presence of EOC cells...
May 17, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28507813/deep-exploration-of-the-immune-infiltrate-and-outcome-prediction-in-testicular-cancer-by-quantitative-multiplexed-immunohistochemistry-and-gene-expression-profiling
#15
Peter J Siska, Romany A N Johnpulle, Alice Zhou, Jennifer Bordeaux, Ju Young Kim, Bashar Dabbas, Naveen Dakappagari, Jeffrey C Rathmell, W Kimryn Rathmell, Alicia K Morgans, Justin M Balko, Douglas B Johnson
Platinum-based chemotherapy is usually curative for patients with testicular germ cell tumors (TGCT), but a subset of patients experience disease progression and poor clinical outcomes. Here, we tested whether immune profiling of TGCT could identify novel prognostic markers and therapeutic targets for this patient cohort. We obtained primary and metastatic TGCT samples from one center. We performed immune profiling using multiplexed fluorescence immunohistochemistry (FIHC) for T-cell subsets and immune checkpoints, and targeted gene expression profiling (Nanostring nCounter Immune panel)...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/28507811/adoptive-natural-killer-cell-therapy-is-effective-in-reducing-pulmonary-metastasis-of-ewing-sarcoma
#16
Alexander A Tong, Hasan Hashem, Saada Eid, Frederick Allen, Daniel Kingsley, Alex Y Huang
The survival of patients with metastatic or relapsed Ewing sarcoma (ES) remains dismal despite intensification of combination chemotherapy and radiotherapy, precipitating the need for novel alternative therapies with minimal side effects. Natural killer (NK) cells are promising additions to the field of cellular immunotherapy. Adoptive NK cell therapy has shown encouraging results in hematological malignancies. Despite these initial promising successes, however, NK cell therapy for solid tumors remains to be investigated using in vivo tumor models...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/28507799/characterization-of-a-human-anti-tumoral-nk-cell-population-expanded-after-bcg-treatment-of-leukocytes
#17
Eva M García-Cuesta, Gloria Esteso, Omodele Ashiru, Sheila López-Cobo, Mario Álvarez-Maestro, Ana Linares, Mei M Ho, Luis Martínez-Piñeiro, Hugh T Reyburn, Mar Valés-Gómez
Immunotherapy, via intra-vesical instillations of BCG, is the therapy of choice for patients with high-risk non-muscle invasive bladder cancer. The subsequent recruitment of lymphocytes and myeloid cells, as well as the release of cytokines and chemokines, is believed to induce a local immune response that eliminates these tumors, but the detailed mechanisms of action of this therapy are not well understood. Here, we have studied the phenotype and function of the responding lymphocyte populations as well as the spectrum of cytokines and chemokines produced in an in vitro model of human peripheral blood mononuclear cells (PBMCs) co-cultured with BCG...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/28507797/il15-induces-a-potent-antitumor-activity-in-nk-cells-isolated-from-malignant-pleural-effusions-and-overcomes-the-inhibitory-effect-of-pleural-fluid
#18
D Croxatto, S Martini, L Chiossone, F Scordamaglia, C F Simonassi, L Moretta, M C Mingari, P Vacca
Natural Killer (NK) cells are capable of recognizing and killing cancer cells and play an important role in tumor immunosurveillance. However, tumor-infiltrating NK cells are frequently impaired in their functional capability. A remarkable exception is represented by NK cells isolated from malignant pleural effusions (PE) that are not anergic and, upon IL2-induced activation, efficiently kill tumor cells. Although IL2 is used in various clinical trials, severe side effects may occur in treated patients. In this study, we investigated whether also other clinical-grade cytokines could induce strong cytotoxicity in NK cells isolated from pleural fluid of patients with primary or metastatic tumors of different origins...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/28505169/molecular-basis-of-targeted-therapy-in-t-nk-cell-lymphoma-leukemia-a-comprehensive-genomic-and-immunohistochemical-analysis-of-a-panel-of-33-cell-lines
#19
Rufino Mondejar, Cristina Pérez, Arantza Onaindia, Nerea Martinez, Julia González-Rincón, Helena Pisonero, Jose Pedro Vaqué, Laura Cereceda, Miguel Santibañez, Margarita Sánchez-Beato, Miguel Angel Piris
T and NK-cell lymphoma is a collection of aggressive disorders with unfavorable outcome, in which targeted treatments are still at a preliminary phase. To gain deeper insights into the deregulated mechanisms promoting this disease, we searched a panel of 31 representative T-cell and 2 NK-cell lymphoma/leukemia cell lines for predictive markers of response to targeted therapy. To this end, targeted sequencing was performed alongside the expression of specific biomarkers corresponding to potentially activated survival pathways...
2017: PloS One
https://www.readbyqxmd.com/read/28503177/the-innate-immune-cross-talk-between-nk-cells-and-eosinophils-is-regulated-by-the-interaction-of-natural-cytotoxicity-receptors-with-eosinophil-surface-ligands
#20
Silvia Pesce, Fredrik B Thoren, Claudia Cantoni, Carola Prato, Lorenzo Moretta, Alessandro Moretta, Emanuela Marcenaro
Previous studies suggested that the cross talk between NK cells and other cell types is crucial for the regulation of both innate and adaptive immune responses. In the present study, we analyzed the phenotypic and functional outcome of the interaction between resting or cytokine-activated NK cells and eosinophils derived from non-atopic donors. Our results provide the first evidence that a natural cytotoxicity receptor (NCR)/NCR ligand-dependent cross talk between NK cells and eosinophils may be important to upregulate the activation state and the effector function of cytokine-primed NK cells...
2017: Frontiers in Immunology
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