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uterine nk cells

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https://www.readbyqxmd.com/read/28327604/chymase-producing-cells-of-the-innate-immune-system-are-required-for-decidual-vascular-remodeling-and-fetal-growth
#1
Nicole Meyer, Katja Woidacki, Martin Knöfler, Gudrun Meinhardt, Désirée Nowak, Philipp Velicky, Jürgen Pollheimer, Ana C Zenclussen
Intrauterine growth restriction (IUGR) is caused by insufficient remodeling of spiral arteries (SAs). The mechanism underlying the relevance of natural killer cells (NKs) and mast cells (MCs) for SA remodeling and its effects on pregnancy outcome are not well understood. We show that NK depletion arrested SA remodeling without affecting pregnancy. MC depletion resulted in abnormally remodeled SAs and IUGR. Combined absence of NKs and MCs substantially affected SA remodeling and impaired fetal growth. We found that α-chymase mast cell protease (Mcpt) 5 mediates apoptosis of uterine smooth muscle cells, a key feature of SA remodeling...
March 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28318556/natural-killer-cells-in-placentation-and-cancer-implications-for-hypertension-during-pregnancy
#2
Heather Yvonne Small, Denise C Cornelius, Tomasz J Guzik, Christian Delles
Hypertension during pregnancy is the most common medical condition encountered during gestation. Despite this, knowledge of the mechanisms that underlie the disease and the development of new therapies are limited. Hypertension during pregnancy and some forms of cancer confer an increased risk to the development of cardiovascular disease later in life; one mechanism which may link these conditions is the involvement of natural killer (NK) cells. Whilst immunology and immunotherapy are well-developed areas in oncology; the complex mechanisms of the immune system in health and disease at the maternal-fetal interface are less well-defined...
March 7, 2017: Placenta
https://www.readbyqxmd.com/read/28295343/epithelial-membrane-protein-2-emp2-deficiency-alters-placental-angiogenesis-mimicking-features-of-human-placental-insufficiency
#3
Carmen J Williams, Alison Chu, Wendy N Jefferson, David Casero, Deepthi Sudhakar, Nevil Khurana, Claire P Hogue, Chinmayi Aryasomayajula, Priya Patel, Peggy Sullivan, Elizabeth Padilla-Banks, Shabnam Mohandessi, Carla Janzen, Madhuri Wadehra
Epithelial membrane protein-2 (EMP2) is a tetraspan protein predicted to regulate placental development. Highly expressed in secretory endometrium and trophectoderm cells, previous studies suggest that it may regulate implantation by orchestrating the surface expression of integrins and other membrane proteins. In order to test the role of EMP2 in pregnancy, mice lacking EMP2 (Emp2(-/-) ) were generated. Emp2(-/-) females are fertile but have reduced litter sizes when carrying Emp2(-/-) but not Emp2(+/-) fetuses...
March 14, 2017: Journal of Pathology
https://www.readbyqxmd.com/read/28284455/uterine-nk-cells-and-macrophages-in-pregnancy
#4
Marijke M Faas, Paul de Vos
The presence of immune cells in the placental bed is important for both mother and child. Although various immune cells can be found in the placental bed, such as regulatory T cells and dendritic cells, uterine NK cells and macrophages are the most prominent immune cells in the placental bed in early pregnancy. uNK cell and macrophage numbers in the placental bed decrease in the third trimester. These cells seem to be specifically adapted for their function and environment. uNK cells do not show cytotoxic activity, but are producers of cytokines, growth factors and many other factors...
March 2, 2017: Placenta
https://www.readbyqxmd.com/read/28283683/pre-pregnancy-levels-of-peripheral-natural-killer-cells-as-markers-for-immunomodulatory-treatment-in-patients-with-recurrent-miscarriage
#5
Ruben J Kuon, Franziska Müller, Kilian Vomstein, Maja Weber, Hannes Hudalla, Sabine Rösner, Thomas Strowitzki, Udo Markert, Volker Daniel, Bettina Toth
Immunological risk factors in patients with recurrent miscarriage (RM) are discussed controversially. Abnormalities of natural killer cells (NK) have been described in RM patients. Lipid infusions are known to modulate lymphocyte subsets. The aim of this study was to identify immune parameters that predict success of treatment with lipid infusions in RM patients with elevated NK. In sum, n = 341 couples with RM were screened for established risk factors and peripheral lymphocyte subpopulations as well as uterine NK cells...
March 11, 2017: Archivum Immunologiae et Therapiae Experimentalis
https://www.readbyqxmd.com/read/28280497/activation-of-blood-cd3-cd56-cd8-t-cells-during-pregnancy-and-multiple-sclerosis
#6
Clara de Andrés, Lidia Fernández-Paredes, Marta Tejera-Alhambra, Bárbara Alonso, Rocío Ramos-Medina, Silvia Sánchez-Ramón
A striking common feature of most autoimmune diseases is their female predominance, with at least twice as common among women than men in relapsing-remitting multiple sclerosis (MS), the prevailing MS clinical form with onset at childbearing age. This fact, together with the protective effect on disease activity during pregnancy, when there are many biological changes including high levels of estrogens and progesterone, puts sex hormones under the spotlight. The role of natural killer (NK) and NKT cells in MS disease beginning and course is still to be elucidated...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28185362/definitive-class-i-human-leukocyte-antigen-expression-in-gestational-placentation-hla-f-hla-e-hla-c-and-hla-g-in-extravillous-trophoblast-invasion-on-placentation-pregnancy-and-parturition
#7
Rinat Hackmon, Lakmini Pinnaduwage, Jianhong Zhang, Stephen J Lye, Daniel E Geraghty, Caroline E Dunk
PROBLEM: The extravillous trophoblasts (EVT) express HLA-C and HLA-G, but HLA-E and HLA-F are the subject of conflicting reports. In this study, we define the HLA expression profile during active EVT placental implantation, pregnancy development, and parturition. METHOD OF STUDY: Immunohistochemistry, q-PCR, and Western blot were used to investigate HLA-C, HLA-E, and HLA-F placental expression across gestation from the early first trimester, late first trimester, second trimester (n=10 in each), preterm gestation (n=6) to elective term cesarean section and term vaginal deliveries (n=12, 38-41 weeks)...
February 10, 2017: American Journal of Reproductive Immunology: AJRI
https://www.readbyqxmd.com/read/28161567/multi-resolution-cell-orientation-congruence-descriptors-for-epithelium-segmentation-in-endometrial-histology-images
#8
Guannan Li, Shan E Ahmed Raza, Nasir M Rajpoot
It has been recently shown that recurrent miscarriage can be caused by abnormally high ratio of number of uterine natural killer (UNK) cells to the number of stromal cells in human female uterus lining. Due to high workload, the counting of UNK and stromal cells needs to be automated using computer algorithms. However, stromal cells are very similar in appearance to epithelial cells which must be excluded in the counting process. To exclude the epithelial cells from the counting process it is necessary to identify epithelial regions...
January 22, 2017: Medical Image Analysis
https://www.readbyqxmd.com/read/28161059/dnk-derived-ifn-%C3%AE-mediates-vsmc-migration-and-apoptosis-via-the-induction-of-lncrna-meg3-a-role-in-uterovascular-transformation
#9
Weifang Liu, Xiaoxia Liu, Minglian Luo, Xiaoping Liu, Qingqing Luo, Hui Tao, Di Wu, Sisi Lu, Jing Jin, Yin Zhao, Li Zou
INTRODUCTION: Appropriate spiral artery remodeling is critical for successful fetal development and pregnancy outcomes. The vascular smooth muscle cell (VSMC) loss and separation, involving cell apoptosis and migration, plays an important role in this process. Decidual natural killer cells (dNK)-derived interferon gamma (IFN-γ), a key regulator of uterine arterial remodeling, can facilitate separation of VSMC layers, however, the specific mechanisms of it action are unknown. Long non-coding RNA MEG3 functions as tumor suppressor by regulating apoptosis and migration...
February 2017: Placenta
https://www.readbyqxmd.com/read/28110751/novel-regulators-of-hemodynamics-in-the-pregnant-uterus
#10
N C Clark, C A Pru, J K Pru
The uterus is a highly dynamic organ, undergoing dramatic physiological changes during normal cyclicity and pregnancy. Many of these changes involve remodeling of the uterine vasculature in order to provide oxygen and nutrients to the developing embryo/fetus. Vasculogenesis, angiogenesis, vasodilation/vasoconstriction, and vascular permeability are coordinated by a vast network of autocrine, paracrine, and endocrine-signaling factors that derive from a number of cellular sources at the maternal:fetal interface, as well as from tissue outside the uterus...
2017: Progress in Molecular Biology and Translational Science
https://www.readbyqxmd.com/read/28098245/natural-cytotoxicity-receptor-1-in-mouse-unk-cell-maturation-and-function
#11
A M Felker, B A Croy
Early and midgestational decidua of mice genetically ablated for expression of the natural killer (NK) cell natural cytotoxicity receptor (NCR; Ncr1(Gfp/Gfp) mice) shows restricted angiogenesis and atypically small uterine (u)NK cells . We hypothesized that NCR1 inactivation disturbs maturation and angiokine production by uterine natural killer (uNK) cells. Using histological and morphometric approaches, we observed that Ncr1(Gfp/Gfp) but not control C57BL/6 (B6) implantation sites sustain immature, non-granulated uNK cells into midpregnancy...
January 18, 2017: Mucosal 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
#12
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...
March 2017: Fertility and Sterility
https://www.readbyqxmd.com/read/28045093/increased-uterine-nk-cell-numbers-and-perforin-expression-during-the-implantation-phase-in-ivf-cycles-with-gnrh-antagonist-protocol
#13
Bufang Xu, Jingwen Wang, Lan Xia, Dan Zhang, Xian Wu, Aijun Zhang
GnRH antagonist negatively affects endometrial receptivity in in vitro fertilization (IVF) cycles, however, its underlying mechanism remains unclear. To explore its target molecules, we studied endometria in the window phase of fixed GnRH antagonist, low-dose flexible GnRH antagonist, GnRH agonist long protocol, and untreated control groups. There were 384 differentially expressed genes (DEGs) in the fixed antagonist group with greater than twofold expression change compared with the control group and 197 DEGs between the fixed antagonist and agonist groups, the majority of which were associated with the natural killer (NK) cell-mediated cytotoxicity pathway...
January 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28043035/pibf-positive-uterine-nk-cells-in-the-mouse-decidua
#14
Agnes Bogdan, Gergely Berta, Julia Szekeres-Bartho
Though uterine NK cells (u NK cells) contain cytotoxic granules, and selectively over- express the genes of perforin and granzymes, during normal pregnancy, they are not cytotoxic. Progesterone is indispensable for the establishment and maintenance of pregnancy both in humans and in mice. Mouse uterine NK cells do not express the classical progesterone receptor, yet progesterone affects the recruitment and function of uterine NK cells, the latter partly via the Progesterone-Induced Blocking Factor (PIBF). We demonstrated PIBF positive granulated cells in the mouse decidua...
December 23, 2016: Journal of Reproductive Immunology
https://www.readbyqxmd.com/read/27940158/inactivation-of-maternal-hif-1%C3%AE-at-mid-pregnancy-causes-placental-defects-and-deficits-in-oxygen-delivery-to-the-fetal-organs-under-hypoxic-stress
#15
Doreswamy Kenchegowda, Bryony Natale, Maria A Lemus, David R Natale, Steven A Fisher
A critical transition occurs near mid-gestation of mammalian pregnancy. Prior to this transition, low concentrations of oxygen (hypoxia) signaling through Hypoxia Inducible Factor (HIF) functions as a morphogen for the placenta and fetal organs. Subsequently, functional coupling of the placenta and fetal cardiovascular system for oxygen (O2) transport is required to support the continued growth and development of the fetus. Here we tested the hypothesis that Hif-1α is required in maternal cells for placental morphogenesis and function...
February 15, 2017: Developmental Biology
https://www.readbyqxmd.com/read/27905000/decidual-natural-killer-cells-and-the-immune-microenvironment-at-the-maternal-fetal-interface
#16
REVIEW
Binqing Fu, Haiming Wei
During early pregnancy, an orchestrated evolutionary maternal adaption toward tolerance of the semiallogeneic fetus is required to ensure decidualization and early embryo development. Remodeling of the immune system involves natural killer cells (NKs), macrophages, T cells and dendritic cells (DCs) altering the microenvironment in the deciduas. In particular, a unique population of NK cells with a CD56(bright)CD16(-) phenotype in the decidua has been proposed to play a key role in the maternal adaptation to pregnancy...
December 2016: Science China. Life Sciences
https://www.readbyqxmd.com/read/27865124/the-killer-cell-story-in-recurrent-miscarriage-association-between-activated-peripheral-lymphocytes-and-uterine-natural-killer-cells
#17
R J Kuon, K Vomstein, M Weber, F Müller, C Seitz, S Wallwiener, T Strowitzki, E Schleussner, U R Markert, V Daniel, B Toth
Peripheral and uterine NK cells (pNK, uNK) can be distinguished according to their receptor expression. Recent studies indicate an association of elevated pNK and uNK with recurrent miscarriage (RM). This study aimed to analyze pNK and uNK in patients with RM and healthy controls. Out of n=590 RM patients screened according to a standard diagnostic protocol, n=268 couples with ≥3 consecutive RM were identified. Subgroups consisted of n=151 primary RM (pRM), n=85 secondary RM (sRM), n=32 tertiary RM (tRM) and n=42 healthy controls...
November 6, 2016: Journal of Reproductive Immunology
https://www.readbyqxmd.com/read/27860312/cytochrome-p450-26a1-modulates-natural-killer-cells-in-mouse-early-pregnancy
#18
Chao-Yang Meng, Zhong-Yin Li, Wen-Ning Fang, Zhi-Hui Song, Dan-Dan Yang, Dan-Dan Li, Ying Yang, Jing-Pian Peng
Cytochrome P450 26A1 (CYP26A1) has a spatiotemporal expression pattern in the uterus, with a significant increase in mRNA and protein levels during peri-implantation. Inhibiting the function or expression of CYP26A1 can cause pregnancy failure, suggesting an important regulatory role of CYP26A1 in the maintenance of pregnancy. However, little is known about the exact mechanism involved. In this study, using a pCR3.1-cyp26a1 plasmid immunization mouse model and a Cyp26a1-MO (Cyp26a1-specific antisense oligos) knockdown mouse model, we report that the number of Dolichos biflorus agglutinin (DBA) lectin-positive uterine natural killer (uNK) cells was reduced in pCR3...
April 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/27815424/activating-kir2ds4-is-expressed-by-uterine-nk-cells-and-contributes-to-successful-pregnancy
#19
Philippa R Kennedy, Olympe Chazara, Lucy Gardner, Martin A Ivarsson, Lydia E Farrell, Shiqiu Xiong, Susan E Hiby, Francesco Colucci, Andrew M Sharkey, Ashley Moffett
Tissue-specific NK cells are abundant in the pregnant uterus and interact with invading placental trophoblast cells that transform the maternal arteries to increase the fetoplacental blood supply. Genetic case-control studies have implicated killer cell Ig-like receptor (KIR) genes and their HLA ligands in pregnancy disorders characterized by failure of trophoblast arterial transformation. Activating KIR2DS1 or KIR2DS5 (when located in the centromeric region as in Africans) lower the risk of disorders when there is a fetal HLA-C allele carrying a C2 epitope...
December 1, 2016: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/27792886/tim-3-expression-on-immune-cells-and-roles-at-the-maternal-fetal-interface
#20
REVIEW
Xiao-Hui Hu, Mao-Xing Tang, Gil Mor, Ai-Hua Liao
Successful pregnancy relies on the accurate regulation of the maternal-fetal immune system. Without enough tolerance in the uterine microenvironment, the mother and the hemiallogeneic fetus could not peacefully coexist. T cell immunoglobulin and mucin domain (Tim)-3 is a molecule originally regarded as to be expressed on terminally differentiated IFN-γ expressing CD4(+) T cells (Th1). The engagement of Tim-3 with its ligand, galectin-9 (Gal-9) could induce the exhaustion or apoptosis of effector T cells, and thus might regulate the tolerance...
October 20, 2016: Journal of Reproductive Immunology
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