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Natural killer cells

N M Mamedalieva, A M Kurmanova, G N Moshkalova, V Kim
A study of the endometrium of women with herpetic infection has shown that early miscarriages (under 12 weeks) occurs as activation of cytotoxic natural killer (NK) cells with CD16 + phenotype and a pronounced suppression level of CD56 + cells endometrial type, and late miscarriages (13-22 weeks of gestation) occurs as cell deficit, followed by reduction of all CD8 + cytotoxic lymphocytes, and of CD56 + and CD16 + NK cells.
October 2016: Gynecological Endocrinology
Charles Vainder, Jonhan Ho, Steven H Swerdlow, Oleg E Akilov
No abstract text is available yet for this article.
September 2016: JAAD Case Reports
Ashley Moffett, Olympe Chazara, Francesco Colucci, Martin H Johnson
A distinctive type of (uterine) natural killer (NK) cell is present in the uterine decidua during the period of placental formation. Uterine NK cells express members of the killer immunoglobulin-like receptor (KIR) family that bind to parental HLA-C molecules on the invading placental trophoblast cells. The maternal KIR genes and their fetal ligands are highly variable, so different KIR/HLA-C genetic combinations occur in each pregnancy. Some women only possess inhibitory KIR genes, whereas other women also express activating KIR genes...
September 5, 2016: Reproductive Biomedicine Online
Ping Zhou, Rui Chen, Cai-Yan Zou, Min Zhang, Zhao-Hong Chen, Li-Ya Ma
OBJECTIVE: To study the postnatal changes in lymphocyte subsets in early preterm infants and the effect of perinatal factors on lymphocyte subsets. METHODS: A total of 61 early preterm infants were enrolled. Flow cytometry was used to measure the absolute counts of lymphocytes and lymphocyte subsets at 1, 7, 14, and 28 days after birth, as well as at 6 months after birth for 17 of these early preterm infants. The effects of perinatal factors, such as antepartum use of hormone, intrauterine infection, gestational age at birth, and Ureaplasma urealyticum (UU) colonization, on lymphocyte subsets were analyzed...
October 2016: Zhongguo Dang Dai Er Ke za Zhi, Chinese Journal of Contemporary Pediatrics
Chuan Shi, Fen Wang, Anli Tong, Xiao-Qian Zhang, Hong-Mei Song, Zheng-Yin Liu, Wei Lyu, Yue-Hua Liu, Wei-Bo Xia
BACKGROUND: Common variable immunodeficiency (CVID) with central adrenal insufficiency is a recently defined clinical syndrome caused by mutations in the nuclear factor kappa-B subunit 2 (NFKB2) gene. We present the first case of NFKB2 mutation in Asian population. METHODS AND RESULTS: An 18-year-old Chinese female with adrenocorticotropic hormone (ACTH) deficiency was admitted due to adrenal crisis and pneumonia. She had a history of recurrent respiratory infections since childhood and ectodermal abnormalities were noted during physical examination...
October 2016: Medicine (Baltimore)
Ting-Hua Yang, Chung-Hong Hu, Hsiou-Hsin Tsai
INTRODUCTION: Pyoderma gangrenosum (PG) is a neutrophilic dermatosis that may be associated with systemic diseases. The association of PG with lymphoid malignancies has rarely been reported. Extranodal natural killer/T-cell lymphoma (ENKTL) is a rare but aggressive entity with a poor prognosis. Here, we report the case of a patient who had idiopathic PG refractory to systemic steroids and subsequently developed ENKTL. CASE REPORT: A 70-year-old man presented with a 2-month history of intermittent fever and multifocal painful papules, plaques, and ulcerations on his extremities...
October 2016: Medicine (Baltimore)
Kuan-Yin Ko, Chia-Ju Liu, Chi-Lun Ko, Ruoh-Fang Yen
PURPOSE: The aim of this study was to investigate whether the textural features of pretreatment F-FDG PET images can predict prognosis for nasal type extranodal natural killer/T-cell lymphoma (ENKTL). MATERIALS AND METHODS: A retrospective analysis of the pretreatment F-FDG PET images of the patients with newly diagnosed nasal type ENKTL from 2008 to 2013 was conducted. Progression-free survival (PFS) was the main outcome measure. The primary tumor was identified and then delineated using the 40% maximum standardized uptake value (SUVmax) thresholding method...
October 5, 2016: Clinical Nuclear Medicine
Emily M Mace
PURPOSE OF REVIEW: Human natural killer (NK) cell development is poorly understood; however, we gain important insight from cases of human primary immunodeficiency that affect the generation of mature human NK cell subsets. In this review, monogenic primary immunodeficiencies that highlight critical requirements for human NK cell development are discussed. RECENT FINDINGS: Increased resolution in NK cell phenotyping has revealed NK cell deficiencies that affect the distribution of NK cell subsets found in peripheral blood...
October 5, 2016: Current Opinion in Allergy and Clinical Immunology
Farhad Shahsavar, Shaghayegh Mapar, Seyyed Amir Yasin Ahmadi
Multiple sclerosis (MS) is a disease in which we can recognize destruction of the myelin that is around nerve cells of brain and spinal cord called as oligodendrocytes. Both genetic and environmental factors play roles in MS. One of these genes is the killer-cell immunoglobulin-like receptor (KIR) which expressed on surface of natural killer cells (NKs). These genes have loci (not locus) in human genome, so they inherit as haplotypes. The results of previous studies show that different genes of KIR may affect both susceptibility and resistance to such autoimmune disorders that their pathogenesis in MS is still unclear...
December 2016: Genomics Data
Gretchen A Hoff, Johannes C Fischer, Katharine Hsu, Sarah Cooley, Jeffrey S Miller, Tao Wang, Michael Haagenson, Stephen Spellman, Stephanie J Lee, Markus Uhrberg, Jeffrey M Venstrom, Michael R Verneris
Natural Killer (NK) cells are important in graft versus leukemia responses following hematopoietic cell transplantation (HCT). A variety of surface receptors dictate NK cell function, including killer immunoglobulin receptor (KIR) recognition of HLA-C. Previous single center studies show that HLA-C epitopes, designated C1 and C2, were associated with allogeneic-HCT outcomes; specifically recipients homozygous for the C1 epitope (C1/C1) experienced a survival benefit. Additionally, mismatching at HLA-C was beneficial in recipients possessing at least one C2 allele, while the opposite was true for homozygous C1 (C1/C1) recipients where HLA-C mismatching resulted in worse outcomes...
October 13, 2016: Biology of Blood and Marrow Transplantation
Michele Miraglia Del Giudice, Annalisa Allegorico
The role of vitamin D in calcium and phosphate homeostasis is well known; however, in addition to traditional functions, vitamin D modulates a variety of processes, and evidence shows that it has an important role in different allergic diseases such as asthma, atopic dermatitis, and food allergy. Vitamin D acts by binding to the vitamin D receptor, which is present in a variety of tissues; for this reason it is considered a hormone. One of the most important functions is to modulate the immune system response, both innate and adaptive, by suppressing Th2-type response and increasing natural killer cells...
November 2016: Journal of Clinical Gastroenterology
Juan C Jiménez-Pérez, Michael K Yoon
Natural killer T-cell lymphoma (NKTCL) is a rare and aggressive condition with a high mortality rate. It is most commonly seen in the nasal sinuses, generally affecting the orbit by direct extension. Primary orbital NKTCL is even more rare, with only a few published cases with occasional secondary nasal involvement. This malignancy can present as a "masquerade syndrome," delaying proper diagnosis and treatment. Biopsy is required for diagnosis, which shows specific histopathological characteristics. Radiation and chemotherapy are the mainstay of treatment...
October 14, 2016: Seminars in Ophthalmology
Honglei Tu, Bo Lei, Shan Meng, Hailing Liu, Yongchang Wei, Aili He, Wanggang Zhang, Fuling Zhou
We assessed the clinical effectiveness and safety of CKI (compound Kushen injection) plus standard induction chemotherapy for treating adult acute leukemia (AL). We randomly assigned 332 patients with newly diagnosed AL to control (n = 165, receiving DA (daunorubicin and cytarabine) or hyper-CVAD (fractionated cyclophosphamide, doxorubicin, vincristine, and dexamethasone)) or treatment (n = 167, receiving CKI and DA or hyper-CVAD) groups. Posttreatment, treatment group CD3+, CD4+, CD4+/CD8+, natural killer (NK) cell, and immunoglobulin (IgG, IgA, and IgM) levels were significantly higher than those of the control group (p < 0...
2016: Evidence-based Complementary and Alternative Medicine: ECAM
Andreas Schneider, Michael Blatzer, Wilfried Posch, Ralf Schubert, Cornelia Lass-Flörl, Stanislaw Schmidt, Thomas Lehrnbecher
Natural Killer (NK) cells are active against Aspergillus fumigatus, which in turn is able to impair the host defense. Unfortunately, little is known on the mutual interaction of NK cells and A. fumigatus. We coincubated human NK cells with A. fumigatus hyphae and assessed the gene expression and protein concentration of selected molecules. We found that A. fumigatus up-regulates the gene expression of pro-inflammatory molecules in NK cells, but inhibited the release of these molecules resulting in intracellular accumulation and limited extracellular availability...
October 12, 2016: Oncotarget
Xi-Wen Bi, Hua Wang, Wen-Wen Zhang, Jing-Hua Wang, Wen-Jian Liu, Zhong-Jun Xia, Hui-Qiang Huang, Wen-Qi Jiang, Yu-Jing Zhang, Liang Wang
BACKGROUND: Natural killer/T-cell lymphoma (NKTCL) is an Epstein-Barr virus (EBV)-associated, highly aggressive lymphoma. Treatment outcome remains sub-optimal, especially for advanced-stage or relapsed diseases. Programmed cell death receptor 1 (PD-1) and PD ligand 1 (PD-L1) have become promising therapeutic targets for various malignancies, but their role in the pathogenesis and their interactions with EBV in NKTCL remains to be investigated. METHODS: Expression of PD-L1 was measured in NK-92 (EBV-negative) and SNK-6 (EBV-positive) cells by western blot, quantitative real-time PCR and enzyme-linked immunosorbent assay, and flow cytometry, respectively...
October 13, 2016: Journal of Hematology & Oncology
Alon Vitenshtein, Yoav Charpak-Amikam, Rachel Yamin, Yoav Bauman, Batya Isaacson, Natan Stein, Orit Berhani, Liat Dassa, Moriya Gamliel, Chamutal Gur, Ariella Glasner, Carlos Gomez, Ronen Ben-Ami, Nir Osherov, Brendan P Cormack, Ofer Mandelboim
Natural killer (NK) cells form an important arm of the innate immune system and function to combat a wide range of invading pathogens, ranging from viruses to bacteria. However, the means by which NK cells accomplish recognition of pathogens with a limited repertoire of receptors remain largely unknown. In the current study, we describe the recognition of an emerging fungal pathogen, Candida glabrata, by the human NK cytotoxic receptor NKp46 and its mouse ortholog, NCR1. Using NCR1 knockout mice, we observed that this receptor-mediated recognition was crucial for controlling C...
October 12, 2016: Cell Host & Microbe
Akbar Ali, Rosemary E Gale, Abdul Rauf Shakoori
Acute myeloid leukemia (AML) is characterized by an increase in the number of myeloid cells in the marrow and an arrest in their maturation. Various genetic mutations are associated with AML. FMS-like tyrosine kinase 3 (FLT3), a member of the class III receptor tyrosine kinase family, plays an important role in stem cell survival, and the development of dendritic and natural killer cells. FLT3/TKD mutations are generally missense mutations or in-frame alterations of residues D835 and I836 within the activation loop of the FLT3 protein...
October 13, 2016: Journal of Cellular Biochemistry
Hua Zheng, Yi Ban, Fang Wei, Xiaojing Ma
Interleukin-12 is a heterodimeric cytokine produced primarily by pathogen-activated antigen-presenting cells, particularly macrophages and dendritic cells, during encountering with intracellular microbes. IL-12 plays a key role in the activation of natural killer cells and CD4(+) T helper cells in both innate and adaptive immune responses against infectious agents and immunosurveillance against endogenous malignancies. However, the potency of IL-12 makes it a target for stringent regulation. Indeed, the temporal, spatial, and quantitative expression of IL-12 during an immune response in a microenvironment contributes critically to the determination of the type, extent, and ultimate resolution of the reaction...
2016: Advances in Experimental Medicine and Biology
Heather Yvonne Small, Ryszard Nosalski, Hannah Morgan, Elisabeth Beattie, Tomasz J Guzik, Delyth Graham, Christian Delles
Women with chronic hypertension are at increased risk of maternal and fetal morbidity and mortality. We have previously characterized the stroke-prone spontaneously hypertensive rat (SHRSP) as a model of deficient uterine artery function and adverse pregnancy outcome compared with the control Wistar-Kyoto. The activation of the immune system plays a role in hypertension and adverse pregnancy outcome. Therefore, we investigated the role of tumor necrosis factor-α in the SHRSP phenotype in an intervention study using etanercept (0...
November 2016: Hypertension
Michaela Golic, Friedrich C Luft, Ralf Dechend
No abstract text is available yet for this article.
November 2016: Hypertension
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