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Nk cell activation

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https://www.readbyqxmd.com/read/29222089/core-binding-factor-%C3%AE-and-runx-transcription-factors-promote-adaptive-natural-killer-cell-responses
#1
Moritz Rapp, Colleen M Lau, Nicholas M Adams, Orr-El Weizman, Timothy E O'Sullivan, Clair D Geary, Joseph C Sun
Natural killer (NK) cells are innate lymphocytes that have features of adaptive immunity such as clonal expansion and generation of long-lived memory. Interleukin-12 (IL-12) signaling through its downstream transcription factor signal transducer and activator of transcription 4 (STAT4) is required for the generation of memory NK cells after expansion. We identify gene loci that are highly enriched for STAT4 binding using chromatin immunoprecipitation sequencing for STAT4 and the permissive histone mark H3K4me3 in activated NK cells...
December 8, 2017: Science Immunology
https://www.readbyqxmd.com/read/29221684/ex-vivo-flush-of-the-limb-allograft-reduces-inflammatory-burden-prior-to-transplantation
#2
Kavit R Amin, Alexandra L Ball, Chandanpreet Chhina, Rebecca J Edge, John P Stone, William R Critchley, Jason K Wong, James E Fildes
BACKGROUND: Passenger leucocytes and inflammatory debris transferred from the donor limb to the recipient can induce allorecognition, which activates the host immune response. This is the first study to evaluate whether the transfer of this inflammatory burden can be reduced via post-preservation flush prior to revascularisation, and whether this is influenced by ischaemia. METHODS: Bilateral forelimbs from the same pig were procured and infused with preservation flush and stored on ice...
November 24, 2017: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
https://www.readbyqxmd.com/read/29221433/hyporesponsiveness-of-natural-killer-cells-and-impaired-inflammatory-responses-in-critically-ill-patients
#3
Minkyung Kim, Minjoo Kim, Hana Jeong, Jey Sook Chae, Young Sam Kim, Jae Gil Lee, Younsoo Cho, Jong Ho Lee
BACKGROUND: To investigate natural killer (NK) cell activity, circulating cytokine level and peripheral blood mononuclear cell (PBMC) cytokine production status in critically ill patients. METHODS: Blood samples were collected <24 h after admission from 24 intensive care unit (ICU) patients and 24 age-, sex-, and body mass index (BMI)-matched healthy controls. Serum cytokine concentrations and cytokine production by PBMCs and lipopolysaccharide (LPS)-stimulated PBMCs were measured...
December 8, 2017: BMC Immunology
https://www.readbyqxmd.com/read/29220536/cd36-deficiency-attenuates-immune-mediated-hepatitis-in-mice-by-modulating-the-proapoptotic-effects-of-cxcl10
#4
Che Xu, Chen Zhang, Jie Ji, Chao Wang, Jing Yang, Biao Geng, Ting Zhao, Hong Zhou, Xianmin Mu, Jinshun Pan, Shi Hu, Yuanfang Lv, Xingguo Chen, Hao Wen, Qiang You
The scavenger receptor, CD36, recognizes a diverse set of ligands, and has been implicated in a wide variety of normal and pathological processes, including lipid metabolism, angiogenesis, atherosclerosis, and phagocytosis. In particular, recent findings have demonstrated its crucial functions in sterile inflammation and tumor metastasis. However, the role of CD36 in immune-mediated hepatitis remains unclear. Concanavalin A (Con A)-induced liver injury is a well-established experimental T cell-mediated hepatitis...
December 8, 2017: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/29215298/echinacea-purpurea-protects-against-restraint-stress-induced-immunosuppression-in-balb-c-mice
#5
Seonyoung Park, Mak-Soon Lee, Sunyoon Jung, Seohyun Lee, Oran Kwon, Matthias Heinrich Kreuter, Tania Perrinjaquet-Moccetti, Bokkee Min, Seong Ho Yun, Yangha Kim
Echinacea purpurea has been widely used for the prevention and treatment of upper respiratory tract infections and the common cold. The restraint stress has been reported to suppress a broad spectrum of immune functions. The aim of this study was to investigate the protective effects of the pressed juice of E. purpurea (L.) Moench (EFLA®894; Echinacea) against restraint stress-induced immunosuppression in BALB/c mice. Echinacea significantly normalized the restraint stress-induced reduction in splenocyte proliferation and splenic natural killer (NK) cell activity (P < ...
December 7, 2017: Journal of Medicinal Food
https://www.readbyqxmd.com/read/29213284/circulatory-immune-cells-in-cushing-syndrome-bystanders-or-active-contributors-to-atherometabolic-injury-a-study-of-adhesion-and-activation-of-cell-surface-markers
#6
Gloria Aranda, Cristina Lopez, Rebeca Fernandez-Ruiz, Yaiza Esteban, Guillermo Garcia-Eguren, Mireia Mora, Irene Halperin, Gregori Casals, Joaquim Enseñat, Felicia A Hanzu
Glucocorticoids (GC) induce cardiometabolic risk while atherosclerosis is a chronic inflammation involving immunity. GC are immune suppressors, and the adrenocorticotrophic hormone (ACTH) has immune modulator activities. Both may act in atherothrombotic inflammation involving immune cells (IMNC). Aim. To investigate adhesion and activation surface cell markers (CDs) of peripheral IMNC in endogenous Cushing syndrome (CS) and the immune modulator role of ACTH. Material and Methods. 16 ACTH-dependent CS (ACTH-D), 10 ACTH-independent (ACTH-ID) CS, and 16 healthy controls (C) were included...
2017: International Journal of Endocrinology
https://www.readbyqxmd.com/read/29213274/natural-killer-cells-in-antifungal-immunity
#7
REVIEW
Stanislaw Schmidt, Lars Tramsen, Thomas Lehrnbecher
Invasive fungal infections are still an important cause of morbidity and mortality in immunocompromised patients such as patients suffering from hematological malignancies or patients undergoing hematopoietic stem cell transplantion. In addition, other populations such as human immunodeficiency virus-patients are at higher risk for invasive fungal infection. Despite the availability of new antifungal compounds and better supportive care measures, the fatality rate of invasive fungal infection remained unacceptably high...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29212951/glycolytic-requirement-for-nk-cell-cytotoxicity-and-cytomegalovirus-control
#8
Annelise Y Mah, Armin Rashidi, Molly P Keppel, Nermina Saucier, Emily K Moore, Joshua B Alinger, Sandeep K Tripathy, Sandeep K Agarwal, Emily K Jeng, Hing C Wong, Jeffrey S Miller, Todd A Fehniger, Emily M Mace, Anthony R French, Megan A Cooper
NK cell activation has been shown to be metabolically regulated in vitro; however, the role of metabolism during in vivo NK cell responses to infection is unknown. We examined the role of glycolysis in NK cell function during murine cytomegalovirus (MCMV) infection and the ability of IL-15 to prime NK cells during CMV infection. The glucose metabolism inhibitor 2-deoxy-ᴅ-glucose (2DG) impaired both mouse and human NK cell cytotoxicity following priming in vitro. Similarly, MCMV-infected mice treated with 2DG had impaired clearance of NK-specific targets in vivo, which was associated with higher viral burden and susceptibility to infection on the C57BL/6 background...
December 7, 2017: JCI Insight
https://www.readbyqxmd.com/read/29211085/cancer-immunotherapy-%C3%AE-environment-labchip-taking-advantage-of-optoelectronic-tweezers
#9
Ling-Yi Ke, Zong-Keng Kuo, Yu-Shih Chen, Tsu-Yi Yeh, Minxiang Dong, Hsiang-Wen Tseng, Cheng-Hsien Liu
A cancer immunotherapy μ-environment LabChip, equipped with titanium oxide phthalocyanine (TiOPc)-based optoelectronic tweezers (OET) to achieve direct cell-cell contact, can be used to study the interaction between immune cells and other cells for real-time analysis of NK cells' behavior. In microfluidic devices, it is difficult to solve dead zone problems and observe dynamic cell-cell interactions. We have created a stable and static culture μ-environment which can enhance NK cell activities. In addition, OET is used to solve dead zone problems by manipulating a single cell into four-leaf-clover-shaped (FLCS) microwells made of poly(ethylene glycol) diacrylate (PEG-DA) through optofluidic maskless lithography, causing direct cell-cell contact...
December 6, 2017: Lab on a Chip
https://www.readbyqxmd.com/read/29209467/biological-roles-and-potential-applications-of-immune-cell-derived-extracellular-vesicles
#10
REVIEW
Chuan Wen, Robert C Seeger, Muller Fabbri, Larry Wang, Alan S Wayne, Ambrose Y Jong
Extracellular vesicles (EVs) deliver bioactive macromolecules (i.e. proteins, lipids and nucleic acids) for intercellular communication in multicellular organisms. EVs are secreted by all cell types including immune cells. Immune cell-derived EVs modulate diverse aspects of the immune system to either enhance or suppress immune activities. The extensive effects of immune cell-derived EVs have become the focus of great interest for various nano-biomedical applications, ranging from the medical use of nanoplatform-based diagnostic agents to the development of therapeutic interventions as well as vaccine applications, and thus may be ideal for 'immune-theranostic'...
2017: Journal of Extracellular Vesicles
https://www.readbyqxmd.com/read/29209334/absence-of-the-non-signalling-chemerin-receptor-ccrl2-exacerbates-acute-inflammatory-responses-in-vivo
#11
Daniel Regan-Komito, Sophia Valaris, Theodore S Kapellos, Carlota Recio, Lewis Taylor, David R Greaves, Asif J Iqbal
Chemerin is a chemotactic protein that induces migration of several immune cells including macrophages, immature dendritic cells, and NK cells. Chemerin binds to three G protein-coupled receptors (GPCRs), including CCRL2. The exact function of CCRL2 remains unclear. CCRL2 expression is rapidly upregulated during inflammation, but it lacks the intracellular DRYLAIV motif required for classical GPCR downstream signalling pathways, and it has not been reported to internalise chemerin upon binding. The aim of this study was to investigate what role if any CCRL2 plays during acute inflammation...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29209332/complement-receptor-3-has-negative-impact-on-tumor-surveillance-through-suppression-of-natural-killer-cell-function
#12
Cheng-Fei Liu, Xiao-Yun Min, Naiyin Wang, Jia-Xing Wang, Ning Ma, Xia Dong, Bing Zhang, Weiju Wu, Zong-Fang Li, Wuding Zhou, Ke Li
Complement receptor 3 (CR3) is expressed abundantly on natural killer (NK) cells; however, whether it plays roles in NK cell-dependent tumor surveillance is largely unknown. Here, we show that CR3 is an important negative regulator of NK cell function, which has negative impact on tumor surveillance. Mice deficient in CR3 (CD11b-/- mice) exhibited a more activated NK phenotype and had enhanced NK-dependent tumor killing. In a B16-luc melanoma-induced lung tumor growth and metastasis model, mice deficient in CR3 had reduced tumor growth and metastases, compared with WT mice...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29209315/gradual-increase-of-fc%C3%AE-riiia-cd16a-expression-and-shift-toward-ifn-%C3%AE-secretion-during-differentiation-of-cd56dim-natural-killer-cells
#13
Laurie Lajoie, Nicolas Congy-Jolivet, Armelle Bolzec, Gilles Thibault
Natural killer (NK) cell effector functions include cytotoxicity and secretion of cytokines such as interferon-γ (IFN-γ). The immature CD56bright subset of human NK cells lacks expression of FcγRIIIa/CD16a, one of the low-affinity immunoglobulin G receptors, or exhibits low-density expression (CD56brightCD16-/dim) and produces IFN-γ in response to cytokine stimulation, whereas the mature CD56dimCD16+ subset is the most cytotoxic one. A further differentiation/maturation of the latter subset according to the gradual loss of NKG2A and/or gain of KIR2DL (CD158a and CD158b) has been demonstrated and the ability to produce IFN-γ in response to activating receptor (AR) co-engagement is gradually acquired during terminal differentiation...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29208932/mouse-papillomavirus-infection-persists-in-mucosal-tissues-of-an-immunocompetent-mouse-strain-and-progresses-to-cancer
#14
Nancy M Cladel, Lynn R Budgeon, Karla K Balogh, Timothy K Cooper, Sarah A Brendle, Neil D Christensen, Todd D Schell, Jiafen Hu
Mouse papillomavirus has shown broad tissue tropism in nude mice. Previous studies have tested cutaneous infections in different immunocompromised and immunocompetent mouse strains. In the current study, we examined mucosal infection in several immunocompetent and immunocompromised mouse strains. Viral DNA was monitored periodically by Q-PCR of lavage samples. Immunohistochemistry and in situ hybridization were used to determine viral capsid protein and viral DNA respectively. All athymic nude mouse strains showed active infections at both cutaneous and mucosal sites...
December 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29207919/enhancement-of-natural-killer-activity-and-ifn-%C3%AE-production-in-an-il-12-dependent-manner-by-a-brassica-rapa-l
#15
Kana Yamamoto, Kanon Furuya, Kazuki Yamada, Fuka Takahashi, Chisato Hamajima, Sachi Tanaka
Certain food components possess immunomodulatory effects. The aim of this study was to elucidate the mechanism of the immunostimulatory activity of Brassica rapa L. We demonstrated an enhancement of natural killer (NK) activity and interferon (IFN)-γ production in mice that were orally administered an insoluble fraction of B. rapa L. The insoluble fraction of B. rapa L. significantly induced IFN-γ production in mouse spleen cells in an interleukin (IL)-12-dependent manner, and NK1.1+ cells were the main cells responsible for producing IFN-γ...
December 6, 2017: Bioscience, Biotechnology, and Biochemistry
https://www.readbyqxmd.com/read/29204427/natural-killer-cells-activity-in-a-metastatic-colorectal-cancer-patient-with-complete-and-long-lasting-response-to-therapy
#16
Alessandro Ottaiano, Maria Napolitano, Monica Capozzi, Salvatore Tafuto, Antonio Avallone, Stefania Scala
Here we report a case of a 70-year-old man who received adjuvant chemotherapy with fluorouracile, folinic acid and oxaliplatin after a left hemicolectomy for a stage IIIb adenocarcinoma in May 2009. During follow-up he de-veloped abdominal lymphnodes metastases evidenced by positron emission tomography- computed tomography (PET-CT) scan and increase of carcinoembryonic antigen (CEA) level. Chemotherapy with capecitabine, oxaliplatin and bevacizumab was started in April 2012. Restaging showed a complete response and normalization of CEA...
November 16, 2017: World Journal of Clinical Cases
https://www.readbyqxmd.com/read/29204089/subpopulations-of-natural-killer-t-like-cells-before-and-after-surgical-treatment-of-laryngeal-cancer
#17
Janusz Klatka, Ewelina Grywalska, Anna Hymos, Ewelina Krasowska, Michał Mielnik, Dorota Siwicka-Gieroba, Justyna Markowicz, Piotr Trojanowski, Witold Olszański, Jacek Roliński
Introduction: Tumours connected with head and neck comprise about 5% of all tumours. The most frequent histological type of laryngeal carcinoma is squamous cell carcinoma. Different research projects suggest that the role of T lymphocytes might be significant in tumour development. iNKT cells are a new subpopulation of T cells and show cytotoxic activity against tumours. iNKT cells participate in modulating the function of other cells which have anti-tumour properties and secrete cytokines, which have pro-inflammatory and anti-inflammatory effects...
2017: Central-European Journal of Immunology
https://www.readbyqxmd.com/read/29203668/epigenetic-therapy-activates-type-i-interferon-signaling-in-murine-ovarian-cancer-to-reduce-immunosuppression-and-tumor-burden
#18
Meredith L Stone, Katherine B Chiappinelli, Huili Li, Lauren M Murphy, Meghan E Travers, Michael J Topper, Dimitrios Mathios, Michael Lim, Ie-Ming Shih, Tian-Li Wang, Chien-Fu Hung, Vipul Bhargava, Karla R Wiehagen, Glenn S Cowley, Kurtis E Bachman, Reiner Strick, Pamela L Strissel, Stephen B Baylin, Cynthia A Zahnow
Ovarian cancer is the most lethal of all gynecological cancers, and there is an urgent unmet need to develop new therapies. Epithelial ovarian cancer (EOC) is characterized by an immune suppressive microenvironment, and response of ovarian cancers to immune therapies has thus far been disappointing. We now find, in a mouse model of EOC, that clinically relevant doses of DNA methyltransferase and histone deacetylase inhibitors (DNMTi and HDACi, respectively) reduce the immune suppressive microenvironment through type I IFN signaling and improve response to immune checkpoint therapy...
December 4, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29196883/magnesium-lithospermate-b-suppresses-lipopolysaccharide-induced-neuroinflammation-in-bv2-microglial-cells-and-attenuates-neurodegeneration-in-lipopolysaccharide-injected-mice
#19
Yaojun Tai, Yujiao Qiu, Zhicheng Bao
Chronic inflammation in the brain plays a critical role in major neurodegenerative diseases such as Alzheimer's disease (AD), Parkinson's disease (PD), and multiple sclerosis (MS). Microglia, the resident macrophages and intrinsic components of the central nervous system (CNS), appear to be the main effectors in this pathological process. Magnesium lithospermate B (MLB) is one of the major bioactive components of Radix Salviae miltiorrhizae, which has been documented to protect neurons against multiple types of neuronal injury...
December 1, 2017: Journal of Molecular Neuroscience: MN
https://www.readbyqxmd.com/read/29195127/rapamycin-synergizes-with-cisplatin-in-antiendometrial-cancer-activation-by-improving-il-27-stimulated-cytotoxicity-of-nk-cells
#20
Wen-Jie Zhou, Kai-Kai Chang, Ke Wu, Hui-Li Yang, Jie Mei, Feng Xie, Da-Jin Li, Ming-Qing Li
Natural killer (NK) cell function is critical for controlling initial tumor growth and determining chemosensitivity of the tumor. A synergistic relationship between rapamycin and cisplatin in uterine endometrial cancer (UEC) in vitro has been reported, but the mechanism and the combined therapeutic strategy for endometrial cancer (EC) are still unknown. We found a positive correlation between the level of IL-27 and the differentiated stage of UEC. The increase of IL-27 in uterine endometrial cancer cell (UECC) lines (Ishikawa, RL95-2 and KLE) led to a high cytotoxic activity of NK cells to UECC in the co-culture system...
November 28, 2017: Neoplasia: An International Journal for Oncology Research
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