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Natural killers

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https://www.readbyqxmd.com/read/29052781/absolute-lymphocyte-counts-at-end-of-induction-correlate-with-distinct-immune-cell-compartments-in-pediatric-b-cell-precursor-acute-lymphoblastic-leukemia
#1
Nina Rolf, Kinga K Smolen, Amina Kariminia, Adam Velenosi, Mario Fidanza, Caron Strahlendorf, Alix E Seif, Gregor S D Reid
Several retrospective studies in children with B cell precursor (BCP) acute lymphoblastic leukemia (ALL) provided clinical evidence that higher absolute lymphocyte counts (ALC) early into treatment significantly correlated with improved relapse-free and overall survival. It still remains unknown, however, whether the predictive role of higher ALCs reflects general bone marrow recovery or a more specific attribute of immune function. To investigate this question, we implemented a prospective observational cohort study in 20 children with BCP ALL on day 29 (D29) of induction chemotherapy and immunophenotyped their lymphoid (T, B and natural killer cells) and myeloid (neutrophils, monocytes, dendritic cells) compartments...
October 20, 2017: Cancer Immunology, Immunotherapy: CII
https://www.readbyqxmd.com/read/29051561/magt1-mediated-disturbance-of-mg-2-homeostasis-lead-to-exhausted-of-hbv-infected-nk-and-cd8-t-cells
#2
Bo Diao, Xiaoyong Huang, Shen Guo, Chengying Yang, Guosong Liu, Yongwen Chen, Yuzhang Wu
The magnesium transporter 1 (MAGT1) is a critical regulator of basal intracellular free magnesium ([Mg(2+)]i) levels. It has been shown that MAGT1 was involved in the disorder in Mg(2+) homeostasis after Epstein-Barr virus (EBV) infection. Here, we identified the effects of MAGT1-mediated disturbance of Mg(2+) homeostasis on chronic hepatitis B virus (HBV)-infected natural killer (NK) and CD8(+) T cells. The expression of MAGT1 was gradually decreased with the increase of infected time in CD8(+) T cells, but not with that in NK cells, of the patients...
October 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29050291/natural-killer-cell-activity-for-ifn-gamma-production-as-a-supportive-diagnostic-marker-for-gastric-cancer
#3
Jongmi Lee, Ki Hyun Park, Ji Hyeong Ryu, Hyun Jin Bae, Aeran Choi, Hyeyoung Lee, Jihyang Lim, Kyungja Han, Cho Hyun Park, Eun Sun Jung, Eun-Jee Oh
BACKGROUND/AIM: Decreased Natural killer cell activity (NKA) for interferon-gamma production (NKA-IFNγ) has been reported in cancer patients. The aim of this study was to determine the diagnostic performance of NKA-IFNγ for gastric cancer (GC). RESULTS: NKA-IFNγ levels were decreased in 261 GC patients with all stages of tumor compared to those in 48 healthy donors (P < 0.001), and lower levels of NKA-IFNγ were associated with higher GC stages. NKA-IFNγ levels were also associated with clinicopathological parameters including tumor size, depth of invasion, and lymph node metastasis...
September 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29046274/genetic-depletion-or-hyperresponsiveness-of-natural-killer-cells-do-not-affect-atherosclerosis-development
#4
Wared Nour Eldine, Jeremie Joffre, Kazem Zibara, Andreas Giraud, Bruno Esposito, Lynda Zeboudj, José Vilar, Megumi Terada, Patrick Bruneval, Eric Vivier, Hafid Ait-Oufella, Ziad Mallat, Sophie Ugolini, Alain Tedgui
Rationale: Chronic inflammation is central in the development of atherosclerosis. Both innate and adaptive immunity are involved. Although several studies have evaluated the functions of NK cells in experimental animal models of atherosclerosis, it is not yet clear whether NK cells behave as protective or pro-atherogenic effectors. One of the main caveats of previous studies was the lack of specificity in targeting loss- or gain-of-function of NK cells. Objective: We used two selective genetic approaches to investigate the role of NK cells in atherosclerosis: 1) Ncr1i(Cre/+)R26(lsl-DTA/+) mice in which NK cells were depleted, 2) Noé mice in which NK cells are hyperresponsive...
October 18, 2017: Circulation Research
https://www.readbyqxmd.com/read/29045904/inkt-cells-orchestrate-a-switch-from-inflammation-to-resolution-of-sterile-liver-injury
#5
Pei Xiong Liew, Woo-Yong Lee, Paul Kubes
After traumatic injury, some cells function as detectors to sense injury and to modulate the local immune response toward a restitution phase by affecting the local cytokine milieu. Using intravital microscopy, we observed that patrolling invariant natural killer T (iNKT) cells were initially excluded from a site of hepatic injury but subsequently were strategically arrested first via self-antigens and then by cytokines, circumscribing the injured site at exactly the location where monocytes co-localized and hepatocytes proliferated...
October 17, 2017: Immunity
https://www.readbyqxmd.com/read/29045900/molecular-and-functional-characterization-of-lymphoid-progenitor-subsets-reveals-a-bipartite-architecture-of-human-lymphopoiesis
#6
Kutaiba Alhaj Hussen, Thien-Phong Vu Manh, Fabien Guimiot, Elisabeth Nelson, Emna Chabaane, Marc Delord, Maxime Barbier, Claire Berthault, Nicolas Dulphy, Antonio José Alberdi, Odile Burlen-Defranoux, Gerard Socié, Jean Christophe Bories, Jerôme Larghero, Valérie Vanneaux, Els Verhoeyen, Thierry Wirth, Marc Dalod, Jean Claude Gluckman, Ana Cumano, Bruno Canque
The classical model of hematopoiesis established in the mouse postulates that lymphoid cells originate from a founder population of common lymphoid progenitors. Here, using a modeling approach in humanized mice, we showed that human lymphoid development stemmed from distinct populations of CD127(-) and CD127(+) early lymphoid progenitors (ELPs). Combining molecular analyses with in vitro and in vivo functional assays, we demonstrated that CD127(-) and CD127(+) ELPs emerged independently from lympho-mono-dendritic progenitors, responded differently to Notch1 signals, underwent divergent modes of lineage restriction, and displayed both common and specific differentiation potentials...
October 17, 2017: Immunity
https://www.readbyqxmd.com/read/29045892/wait-wait-%C3%A2-ok-now-go-in-inkt-cells-resolve-liver-inflammation
#7
Haiguang Wang, Kristin A Hogquist
Resolution of inflammation is pivotal to restoring tissue homeostasis, yet there is limited understanding of how this process is regulated. In this issue of Immunity, Liew et al. (2017) reveal a critical role for invariant natural killer T (iNKT) cells in switching inflammation to tissue repair in an interlukin-4-dependent process.
October 17, 2017: Immunity
https://www.readbyqxmd.com/read/29045069/association-of-natural-killer-cell-ligand-polymorphism-hla-c-asn80lys-with-the-development-of-anti-ssa-ro-associated-congenital-heart-block
#8
Hannah C Ainsworth, Miranda C Marion, Tiziana Bertero, Antonio Brucato, Rolando Cimaz, Nathalie Costedoat-Chalumeau, Micaela Fredi, Patrick Gaffney, Jennifer Kelly, Kateri Levesque, Alice Maltret, Nathalie Morel, Veronique Ramoni, Amelia Ruffatti, Carl D Langefeld, Jill P Buyon, Robert M Clancy
OBJECTIVE: Fetal exposure to maternal anti-SSA/Ro antibodies is necessary but not sufficient for the development of autoimmune congenital heart block (CHB), suggesting that other factors, such as fetal genetic predisposition, are important. Given the previously described association between major histocompatibility complex alleles and CHB risk, we undertook the present study to test the hypothesis that a variant form of HLA-C Asn80Lys, which binds with high affinity to an inhibitory killer cell immunoglobulin-like receptor (KIR) and thus renders natural killer (NK) cells incapable of restricting inflammation, contributes to the development of CHB...
October 17, 2017: Arthritis & Rheumatology
https://www.readbyqxmd.com/read/29044158/laboratory-cryo-x-ray-microscopy-for-3d-cell-imaging
#9
Emelie Fogelqvist, Mikael Kördel, Valentina Carannante, Björn Önfelt, Hans M Hertz
Water-window x-ray microscopy allows two- and three-dimensional (2D and 3D) imaging of intact unstained cells in their cryofixed near-native state with unique contrast and high resolution. Present operational biological water-window microscopes are based at synchrotron facilities, which limits their accessibility and integration with complementary methods. Laboratory-source microscopes have had difficulty addressing relevant biological tasks with proper resolution and contrast due to long exposure times and limited up-time...
October 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29043842/the-protective-and-immunomodulatory-effects-of-fucoidan-against-7-12-dimethyl-benz-a-anthracene-induced-experimental-mammary-carcinogenesis-through-the-pd1-pdl1-signaling-pathway-in-rats
#10
Meilan Xue, Hui Liang, Qingjuan Tang, Chuanxing Xue, Xinjia He, Li Zhang, Zheng Zhang, Zhengyan Liang, Kang Bian, Lichen Zhang, Zhuxin Li
Fucoidan is a sulfated polysaccharide that is extracted from brown algae seaweed. This study was designed to evaluate the protective and immunomodulatory effects of dietary fucoidan on 7,12-dimethyl benz[a]anthracene (DMBA)-induced experimental mammary carcinogenesis in rats. Sixty Sprague-Dawley rats were randomly assigned to four equal groups: the control group (control group), the cancer model group (model group), and the F1 and F2 groups, which were fed fucoidan at concentrations of 200 and 400 mg/kg·body weight, respectively...
October 18, 2017: Nutrition and Cancer
https://www.readbyqxmd.com/read/29043703/the-effects-of-dienogest-on-macrophage-and-natural-killer-cells-in-adenomyosis-a-randomized-controlled-study
#11
Saowapak Prathoomthong, Yada Tingthanatikul, Srithean Lertvikool, Nittaya Rodratn, Wanwisa Waiyaput, Kanthanadon Dittharot, Morakot Sroyraya, Areepan Sophonsritsuk
Background: Progestin has been used for symptomatic treatment of adenomyosis, although its effect on the immune system has not been studied. The aim of this study was to investigate the changes of macrophage and natural killer (NK) cell infiltration in tissues obtained from women with adenomyosis who did or did not receive oral progestin dienogest. MATERIALS AND METHODS: In this randomized controlled clinical trial study, 24 patients with adenomyosis who required hysterectomy were enrolled...
January 2018: International Journal of Fertility & Sterility
https://www.readbyqxmd.com/read/29042994/immunological-mechanism-of-low-dose-priming-radiation-resistance-in-walker-256-tumor-model-mice
#12
Li Feng, Ling Qin, Dan Guo, Daping Deng, Feng Lu, Hailiang Li, Narisu Bao, Xiting Yang, Hongyu Ding, Jianguo Li
The aim of the present study was to investigate whether low-dose priming radiation induces antitumor immunity that can be augmented by the modulation of natural killer (NK) cell and cytokine activity using a mouse tumor model. Walker-256 cells were injected into the right flank of male BALB/c mice. At 7 days after inoculation, mice were divided into three groups, including group 1,2,3. In group 1 the mice were without radiation, in group 2 the mice were received 2 Gy radiation only, and in group 3 the mice were radiated with a priming dose of 75 mGy followed by 2 Gy radiation after 24 h...
October 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29042861/corrigendum-natural-killer-cells-from-patients-with-recombinase-activating-gene-and-non-homologous-end-joining-gene-defects-comprise-a-higher-frequency-of-cd56-bright-nkg2a-cells-and-yet-display-increased-degranulation-and-higher-perforin-content
#13
Kerry Dobbs, Giovanna Tabellini, Enrica Calzoni, Ornella Patrizi, Paula Martinez, Silvia Clara Giliani, Daniele Moratto, Waleed Al-Herz, Caterina Cancrini, Morton Cowan, Jacob Bleesing, Claire Booth, David Buchbinder, Siobhan O Burns, Talal A Chatila, Janet Chou, Vanessa Daza-Cajigal, Lisa M Ott de Bruin, Maite Teresa de la Morena, Gigliola Di Matteo, Andrea Finocchi, Raif Geha, Rakesh K Goyal, Anthony Hayward, Steven Holland, Chiung-Hui Huang, Maria G Kanariou, Alejandra King, Blanka Kaplan, Anastasiya Kleva, Taco W Kuijpers, Bee Wah Lee, Vassilios Lougaris, Michel Massaad, Isabelle Meyts, Megan Morsheimer, Benedicte Neven, Sung-Yun Pai, Nima Parvaneh, Alessandro Plebani, Susan Prockop, Ismail Reisli, Jian Yi Soh, Raz Somech, Troy R Torgerson, Yae-Jean Kim, Jolan E Walter, Andrew R Gennery, Sevgi Keles, John P Manis, Emanuela Marcenaro, Alessandro Moretta, Silvia Parolini, Luigi D Notarangelo
[This corrects the article on p. 798 in vol. 8, PMID: 28769923.].
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29042488/natural-killer-cells-mediate-pathophysiology-in-response-to-reduced-uterine-perfusion-pressure
#14
Jamil Elfarra, Lorena M Amaral, Maggie McCalmon, Jeremy D Scott, Mark W Cunningham, Ashley Gnam, Tarek Ibrahim, Babbette LaMarca, Denise C Cornelius
Preeclampsia is associated with hypertension, small-for-gestational-age babies and increased cytolytic natural killer (NK) cells. The specific role of cytolytic NK cells in the pathophysiology of preeclampsia has not been clearly defined. We hypothesized that Reduced Uterine Perfusion Pressure (RUPP) stimulates proliferation and cytolytic activation of NK cells, and that reducing NK cells in RUPP would prevent hypertension, intrauterine growth restriction, and inflammation in response to placental ischemia...
October 17, 2017: Clinical Science (1979-)
https://www.readbyqxmd.com/read/29042454/complement-activating-anti-hla-antibodies-in-kidney-transplantation-allograft-gene-expression-profiling-and-response-to-treatment
#15
Carmen Lefaucheur, Denis Viglietti, Luis G Hidalgo, Lloyd E Ratner, Serena M Bagnasco, Ibrahim Batal, Olivier Aubert, Babak J Orandi, Federico Oppenheimer, Oriol Bestard, Paolo Rigotti, Anna V Reisaeter, Nassim Kamar, Yvon Lebranchu, Jean-Paul Duong Van Huyen, Patrick Bruneval, Denis Glotz, Christophe Legendre, Jean-Philippe Empana, Xavier Jouven, Dorry L Segev, Robert A Montgomery, Adriana Zeevi, Philip F Halloran, Alexandre Loupy
Complement-activating anti-HLA donor-specific antibodies (DSAs) are associated with impaired kidney transplant outcome; however, whether these antibodies induce a specific rejection phenotype and influence response to therapy remains undetermined. We prospectively screened 931 kidney recipients for complement-activating DSAs and used histopathology, immunostaining, and allograft gene expression to assess rejection phenotypes. Effector cells were evaluated using in vitro human cell cultures. Additionally, we assessed the effect of complement inhibition on kidney allograft rejection phenotype and the clinical response to complement inhibition in 116 independent kidney recipients with DSAs at transplant receiving rejection prophylaxis with eculizumab or standard of care (plasma exchange and intravenous Ig) at ten international centers...
October 17, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/29042417/restoration-of-natural-killer-cell-anti-metastatic-activity-by-il-12-and-checkpoint-blockade
#16
Isabel Ohs, Laura Ducimetiere, Joana Marinho, Paulina Kulig, Burkhard Becher, Sonia Tugues
Immune checkpoint therapies target tumor antigen-specific T cells, but less is known about their effects on natural killer (NK) cells, which help control metastasis. In studying the development of lung metastases, we found that NK cells lose their cytotoxic capacity and acquire a molecular signature defined by the expression of co-inhibitory receptors. In an effort to overcome this suppressive mechanism, we evaluated NK cell responses to the immunostimulatory cytokine IL-12. Exposure to IL-12 rescued the cytotoxicity of NK cells but also led to the emergence of an immature NK cell population which expressed high levels of the co-inhibitory molecules PD-1, Lag-3 and TIGIT, thereby limiting NK cell-mediated control of pulmonary metastases...
October 17, 2017: Cancer Research
https://www.readbyqxmd.com/read/29040918/tumor-cryoablation-in-combination-with-natural-killer-cells-therapy-and-herceptin-in-patients-with-her2-overexpressing-recurrent-breast-cancer
#17
Shuzhen Liang, Lizhi Niu, Kecheng Xu, Xiaohua Wang, Yingqing Liang, Mingjie Zhang, Jibing Chen, Mao Lin
In this study, we investigated the clinical benefits of a combination of tumor cryoablation with natural killer (NK) cells therapy and Herceptin for human epidermal growth factor (HER) 2-overexpressing recurrent breast cancer. From May 2015 to May 2016, 48 patients who met the enrollment criteria were assigned to three groups (n=16): cryoablation group (group I), cryoablation-NK cells therapy group (group II) and cryoablation-NK cells therapy-Herceptin group (group III). Safety and short-term effects were evaluated...
October 13, 2017: Molecular Immunology
https://www.readbyqxmd.com/read/29040754/development-of-unique-cytotoxic-chimeric-antigen-receptors-based-on-human-scfv-targeting-b7h6
#18
Casey K Hua, Albert T Gacerez, Charles L Sentman, Margaret E Ackerman
As a stress-inducible natural killer (NK) cell ligand, B7H6 plays a role in innate tumor immunosurveillance and is a fairly tumor selective marker expressed on a variety of solid and hematologic cancer cells. Here, we describe the isolation and characterization of a new family of single chain fragment variable (scFv) molecules targeting the human B7H6 ligand. Through directed evolution of a yeast surface displayed non-immune human-derived scFv library, eight candidates comprising a single family of clones differing by up to four amino acid mutations and exhibiting nM avidities for soluble B7H6-Ig were isolated...
October 11, 2017: Protein Engineering, Design & Selection: PEDS
https://www.readbyqxmd.com/read/29039342/report-in-vitro-immune-potentials-of-a-water-soluble-polysaccharide-extract-from-dioscorea-opposita-planted-in-henan-province-china
#19
Li-Xin Hao Hao, Xin-Huai Zhao
Dioscorea opposita is an edible and medicinal plant available in many areas of China. This study aimed to assess in vitro immune potentials of a water-soluble polysaccharide extract from D. opposita planted in Henan Province, China. In vitro effects of the extract on three immune cells (macrophages, natural killer cells and splenocytes) from mice and secretion of eight immune-related molecules in macrophages and splenocytes were evaluated. In total, the extract exhibited a dose-dependent manner on these immunological responses...
July 2017: Pakistan Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29038795/immune-engineering-from-systems-immunology-to-engineering-immunity
#20
Ning Jiang
The smallpox vaccine represents the earliest attempt in engineering immunity. The recent success of chimeric antigen receptor T cells (CAR-T cells) in cancer once again demonstrates the clinical potential of immune engineering. Inspired by this success, diverse approaches have been used to boost various aspects of immunity: engineering dendritic cells (DCs), natural killer (NK) cells, T cells, antibodies, cytokines, small peptides, and others. With recent development of various high-throughput technologies (of which engineers, especially biomedical engineers/bioengineers contributed significantly), such as immune repertoire sequencing, and analytical methods, a systems level of understanding immunity (or the lack of it) beyond model animals has provided critical insights into the human immune system...
March 2017: Curr Opin Biomed Eng
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