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https://www.readbyqxmd.com/read/29154462/the-role-of-indoleamine-2-3-dioxygenase-in-normal-and-pathological-pregnancies
#1
REVIEW
Rui-Qi Chang, Da-Jin Li, Ming-Qing Li
The survival of allogeneic fetus during pregnancy contradicts the laws of immune responses. Behind this paradoxical phenomenon, the mechanism is quite complex. Indoleamine-2,3-dioxygenase (IDO) is the first and rate-limiting enzyme of tryptophan catabolism. Emerging evidence shows that IDO is expressed at the maternal-fetal interface, including trophoblast cells, decidual stroma cells, decidual immune cells (eg, natural killer cells, T cells, and macrophages), and vascular endothelial cells of decidua and chorion...
November 20, 2017: American Journal of Reproductive Immunology: AJRI
https://www.readbyqxmd.com/read/29099629/regulatory-t-cells-improve-pregnancy-rate-in-rif-patients-after-additional-ivig-treatment
#2
Majid Ahmadi, Samaneh Abdolmohammadi-Vahid, Mahnaz Ghaebi, Leili Aghebati-Maleki, Sanam Dolati, Laya Farzadi, Aliyeh Ghasemzadeh, Kobra Hamdi, Vahid Younesi, Mohammad Nouri, Mehdi Yousefi
RIF (repeated implantation failure) women with immunologic basis and cellular abnormalities may benefit from intravenous immunoglobulins (IVIG) as an immunomodulator based on different studies. In this study, we evaluated the effect of IVIG on the frequency and function of Th17 and Treg cells, as two important subgroups of CD4(+) T cells in implantation and pregnancy rates. Seventy-two RIF patients with preconception Th1⁄Th2 ratio and natural killer (NK) cells frequency and activity elevation were selected and divided into two groups; 40 out of 72 received IVIG, aspirin, and heparin (anoxaparin) and constituted the treatment group and 32 patients received aspirin and heparin (anoxaparin) and no IVIG and were the control group...
November 3, 2017: Systems Biology in Reproductive Medicine
https://www.readbyqxmd.com/read/29056235/maternal-effector-t-cells-within-decidua-the-adaptive-immune-response-to-pregnancy
#3
D Lissauer, M D Kilby, P Moss
In human pregnancy the maternal immune system plays a critical role in the regulation of many aspects of human reproduction including implantation, placentation and defence against infection. Interest has been focussed on the role of uterine natural killer cells (uNK) in the maternal decidua whereas effector CD4+ and CD8+ T cells have received much less attention despite the observation that they represent a major proportion of decidual leucocytes in the latter phase of pregnancy. A range of recent studies have demonstrated that human decidual T cells are highly differentiated, express a range of cytokines and cytotoxic markers, and demonstrate a unique transcriptional profile characterized by high level expression of genes involved in interferon-signalling...
September 8, 2017: Placenta
https://www.readbyqxmd.com/read/29055791/the-role-of-decidual-immune-cells-on-human-pregnancy
#4
REVIEW
Su Liu, Lianghui Diao, Chunyu Huang, Yuye Li, Yong Zeng, Joanne Y H Kwak-Kim
The maternal-fetal interface undergoes dynamic changes to allow the fetus to grow and develop in the uterus, despite being recognized by the maternal immune cells. Within the innate immune system, decidual natural killer cells and antigen presenting cells (including macrophages and dendritic cells) that comprise a large proportion of the decidual leukocyte populations play an important role in modulating trophoblast invasion, angiogenesis and vascular remodeling. On the other hand, within the adaptive immune system, CD8(+) T cells, effector CD4(+) T cells, Foxp3(+) regulatory T cells and CD4(+)HLA-G(+) suppressor T cells are identified as potential players in maintaining immune tolerance toward the semi-allogeneic fetus...
October 18, 2017: Journal of Reproductive Immunology
https://www.readbyqxmd.com/read/28986438/decidual-t-cells-exhibit-a-highly-differentiated-phenotype-and-demonstrate-potential-fetal-specificity-and-a-strong-transcriptional-response-to-ifn
#5
Richard M Powell, David Lissauer, Jennifer Tamblyn, Andrew Beggs, Philip Cox, Paul Moss, Mark D Kilby
Immune tolerance during human pregnancy is maintained by a range of modifications to the local and systemic maternal immune system. Lymphoid infiltration is seen at the implantation site of the fetal-maternal interface, and decidual NK cells have been demonstrated to facilitate extravillous trophoblast invasion into maternal decidua during the first trimester, optimizing hemochorial placentation. However, although there is considerable T cell infiltration of the maternal decidua, the functional properties of this T cell response remain poorly defined...
November 15, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28975683/involvement-of-the-jak-stat-pathway-in-collagen-regulation-of-decidual-nk-cells
#6
Qiang Fu, Yufei Sun, Yu Tao, Hailan Piao, Xiaoqiu Wang, Xiying Luan, Meirong Du, Dajin Li
PROBLEM: The mechanisms underlying the regulation of decidual natural killer cells (dNKs) at the maternal-fetal interface are unclear. METHOD OF STUDY: Primary trophoblasts (TROs), decidual stromal cells (DSCs), and dNKs were cocultured, and responses to LAIR-2 (LAIR-1 inhibitor) and P4H shRNA (collagen inhibitor) were studied. RESULTS: Coculture of dNKs with primary TROs/DSCs resulted in downregulation of Th1 cytokine production by dNKs. These effects were abrogated by LAIR-2 and P4H shRNA...
October 4, 2017: American Journal of Reproductive Immunology: AJRI
https://www.readbyqxmd.com/read/28962035/immune-cell-and-transcriptomic-analysis-of-the-human-decidua-in-term-and-preterm-parturition
#7
S F Rinaldi, S Makieva, P T Saunders, A G Rossi, J E Norman
STUDY QUESTION: Is labour, both at term and preterm, associated with alterations in decidual lymphocyte densities and widespread changes to the decidual transcriptome? SUMMARY ANSWER: The onset of parturition, both at term and preterm, is associated with widespread gene expression changes in the decidua, many of which are related to inflammatory signalling, but is not associated with changes in the number of any of the decidual lymphocyte populations examined. WHAT IS KNOWN ALREADY: Given its location, directly at the maternal-foetal interface, the decidua is likely to play a pivotal role in the onset of parturition, however, the molecular events occurring in the decidua in association with the onset of labour, both at term and preterm, remain relatively poorly defined...
August 18, 2017: Molecular Human Reproduction
https://www.readbyqxmd.com/read/28794456/activated-nk-cells-cause-placental-dysfunction-and-miscarriages-in-fetal-alloimmune-thrombocytopenia
#8
Issaka Yougbaré, Wei-She Tai, Darko Zdravic, Brigitta Elaine Oswald, Sean Lang, Guangheng Zhu, Howard Leong-Poi, Dawei Qu, Lisa Yu, Caroline Dunk, Jianhong Zhang, John G Sled, Stephen J Lye, Jelena Brkić, Chun Peng, Petter Höglund, B Anne Croy, S Lee Adamson, Xiao-Yan Wen, Duncan J Stewart, John Freedman, Heyu Ni
Miscarriage and intrauterine growth restriction (IUGR) are devastating complications in fetal/neonatal alloimmune thrombocytopenia (FNAIT). We previously reported the mechanisms for bleeding diatheses, but it is unknown whether placental, decidual immune cells or other abnormalities at the maternal-fetal interface contribute to FNAIT. Here we show that maternal immune responses to fetal platelet antigens cause miscarriage and IUGR that are associated with vascular and immune pathologies in murine FNAIT models...
August 9, 2017: Nature Communications
https://www.readbyqxmd.com/read/28781765/up-and-down-immunity-of-pregnancy-in-humans
#9
REVIEW
Philippe Le Bouteiller, Armand Bensussan
One part of the human placenta in early pregnancy is particularly important for local immunity: the decidua basalis, which is transformed endometrium located at the site of embryo implantation . This placental bed tissue contains both maternal uterine immune cells, including decidual natural killer (NK) cells, the dominant leukocyte population exhibiting a unique phenotype, and fetal extravillous trophoblast which comes into direct contact with maternal decidual cells . To establish a successful placental development and healthy pregnancy outcome, the maternal immune system must tolerate paternal antigens expressed by trophoblast cells yet remain efficient for clearing any local pathogen infection...
2017: F1000Research
https://www.readbyqxmd.com/read/28702027/decreased-human-leukocyte-antigen-g-expression-by-mir-133a-contributes-to-impairment-of-proinvasion-and-proangiogenesis-functions-of-decidual-nk-cells
#10
Wenwei Guo, Liang Fang, Bo Li, Xifeng Xiao, Shuqiang Chen, Jun Wang, Fang Yang, Lihua Chen, Xiaohong Wang
Human leukocyte antigen (HLA)-G plays a crucial role in conferring fetal-maternal tolerance and ensuring a successful pregnancy. CD56(bright) natural killer (NK) cells accumulate at the maternal decidua in large numbers during pregnancy and are found in direct contact with fetal trophoblasts. There are increasing evidences that decidual NK (dNK) cells are crucial for pregnancy. However, the regulation of dNK cells is mostly unknown. Here, we provide evidences that the secretion function of dNK cells in recurrent spontaneous abortion was impaired, which led to the impairment of the proinvasion and proangiogenesis functions of dNK cells...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28693893/emerging-role-for-dysregulated-decidualization-in-the-genesis-of-preeclampsia
#11
Kirk P Conrad, Maria Belen Rabaglino, Emiel D Post Uiterweer
In normal human placentation, uterine invasion by trophoblast cells and subsequent spiral artery remodeling depend on cooperation among fetal trophoblasts and maternal decidual, myometrial, immune and vascular cells in the uterine wall. Therefore, aberrant function of anyone or several of these cell-types could theoretically impair placentation leading to the development of preeclampsia. Because trophoblast invasion and spiral artery remodeling occur during the first half of pregnancy, the molecular pathology of fetal placental and maternal decidual tissues following delivery may not be informative about the genesis of impaired placentation, which transpired months earlier...
June 9, 2017: Placenta
https://www.readbyqxmd.com/read/28677766/human-decidua-mesenchymal-stem-cells-regulate-decidual-natural-killer-cell-function-via-interactions-between-collagen-and-leukocyte%C3%A2-associated-immunoglobulin%C3%A2-like-receptor-1
#12
Qiang Fu, Xuejing Man, Min Yu, Yongli Chu, Xiying Luan, Hailan Piao, Jiangnan Xue, Changzhu Jin
The development of maternal tolerance to the fetal allograft in critical for the maintenance of the pregnancy, and it is accompanied by the development of a special decidual natural killer (dNK) cell tolerance phenotype. To understand the factors that influence dNK cells during early pregnancy, the present study aimed to identify mesenchymal stem cells (MSCs) from human first‑trimester deciduas, termed decidual MSCs (DMSCs), and to investigate the effect of DMSCs on the regulation of dNK cells via collagen...
September 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28653669/dnk-cells-facilitate-the-interaction-between-trophoblastic-and-endothelial-cells-via-vegf-c-and-hgf
#13
Liyang Ma, Guanlin Li, Guangming Cao, Yuchun Zhu, Mei-Rong Du, Yangyu Zhao, Hao Wang, Yanlei Liu, Yanyan Yang, Yu-Xia Li, Da-Jin Li, Huixia Yang, Yan-Ling Wang
Decidual NK (dNK) cells, identified as CD56(bright)CD16(-)CD3(-), account for ~70% of lymphocytes within the uterine wall during early pregnancy. Accumulating evidence suggests that tight interactions between placental trophoblasts and dNK cells are critical for trophoblast cell differentiation. However, the underlying mechanism remains to be explored in detail. In the present study, conditioned medium (CM) was collected from cultured primary human dNK cells. Primary cytotrophoblasts (CTBs) or the human trophoblast cell line HTR8/SVneo was treated with dNK-CM and co-cultured with human umbilical vein endothelial cells (HUVECs) in a three-dimensional Matrigel scaffold, and the formation of tube structures was dynamically monitored with live cell imaging...
September 2017: Immunology and Cell Biology
https://www.readbyqxmd.com/read/28588205/human-uterine-lymphocytes-acquire-a-more-experienced-and-tolerogenic-phenotype-during-pregnancy
#14
Dorien Feyaerts, Marilen Benner, Bram van Cranenbroek, Olivier W H van der Heijden, Irma Joosten, Renate G van der Molen
Pregnancy requires a delicate immune balance that nurtures the allogeneic fetus, while maintaining reactivity against pathogens. Despite increasing knowledge, data is lacking on the transition of pre-pregnancy endometrial lymphocytes to a pregnancy state. Here, we immunophenotyped lymphocytes from endometrium (MMC), term decidua parietalis (DPMC), and PBMC for direct comparison. We found that the immune cell composition of MMC and DPMC clearly differ from each other, with less NK-cells, and more NKT-cells and T-cells in DPMC...
June 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28566515/a-microfluidics-assay-to-study-invasion-of-human-placental-trophoblast-cells
#15
Yassen Abbas, Carolin Melati Oefner, William J Polacheck, Lucy Gardner, Lydia Farrell, Andrew Sharkey, Roger Kamm, Ashley Moffett, Michelle L Oyen
Pre-eclampsia, fetal growth restriction and stillbirth are major pregnancy disorders throughout the world. The underlying pathogenesis of these diseases is defective placentation characterized by inadequate invasion of extravillous placental trophoblast cells into the uterine arteries. How trophoblast invasion is controlled remains an unanswered question but is influenced by maternal uterine immune cells called decidual natural killer cells. Here, we describe an in vitro microfluidic invasion assay to study the migration of primary human trophoblast cells...
May 2017: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/28507070/limited-colonization-undermined-by-inadequate-early-immune-responses-defines-the-dynamics-of-decidual-listeriosis
#16
Gabrielle Rizzuto, Elisa Tagliani, Priyanka Manandhar, Adrian Erlebacher, Anna I Bakardjiev
The bacterial pathogen Listeria monocytogenes causes foodborne systemic disease in pregnant women, which can lead to preterm labor, stillbirth, or severe neonatal disease. Colonization of the maternal decidua appears to be an initial step in the maternal component of the disease as well as bacterial transmission to the placenta and fetus. Host-pathogen interactions in the decidua during this early stage of infection remain poorly understood. Here, we assessed the dynamics of L. monocytogenes infection in primary human decidual organ cultures and in the murine decidua in vivo A high inoculum was necessary to infect both human and mouse deciduas, and the data support the existence of a barrier to initial colonization of the murine decidua...
August 2017: Infection and Immunity
https://www.readbyqxmd.com/read/28479751/uterine-cd56-dim-and-cd16-cells-in-refractory-antiphospholipid-antibody-related-pregnancy-loss-and-chromosomally-intact-abortuses-a-case-control-study
#17
Mostafa F Gomaa, Abdeiiatif G Elkhouly, Mohammad M Farghly, Laila A Farid, Nahla M Awad
AIM: To evaluate the role of uterine natural killer (uNK) CD56(dim) and CD16(+) cells in patients with refractory antiphospholipid, antibody-mediated, recurrent, pregnancy loss. SETTINGS AND DESIGN: A case-control study was conducted between 2012 and 2015 at a university hospital. PATIENTS AND METHODS: A group of 118 women with a history of antiphospholipid antibody syndrome experiencing fetal loss in spite of low dose aspirin (LDA) and low molecular weight heparin (LMWH) treatment in the current pregnancy were included in this study...
January 2017: Journal of Human Reproductive Sciences
https://www.readbyqxmd.com/read/28474619/number-of-decidual-natural-killer-cells-macrophages-in-pre-eclampsia
#18
Jelena Milosevic-Stevanovic, Miljan Krstic, Dragana Radovic-Janosevic, Jasmina Popovic, Marija Tasic, Slavica Stojnev
BACKGROUND & OBJECTIVES: The process of human placentation is complex and still not well understood. This study was aimed to examine the relationship between clinical features of pre-eclampsia and degree of trophoblastic invasion after its immunohistochemical visualization in the context of possible alterations in the number of natural killer (NK) cells and macrophages in the decidua. METHODS: This prospective study included a study group comprising 30 pregnant women with pre-eclampsia delivered by caesarean section and a control group comprising 20 healthy pregnant women also delivered by caesarean section...
December 2016: Indian Journal of Medical Research
https://www.readbyqxmd.com/read/28474613/role-of-decidual-natural-killer-cells-macrophages-in-pre-eclampsia
#19
Pranab Dey
No abstract text is available yet for this article.
December 2016: Indian Journal of Medical Research
https://www.readbyqxmd.com/read/28438315/tgf-%C3%AE-1-improving-abnormal-pregnancy-outcomes-induced-by-toxoplasma-gondii-infection-regulating-nkg2d-dap10-and-killer-subset-of-decidual-nk-cells
#20
Xiaoyan Xu, Jian Zhang, Shaowei Zhan, Zhidan Li, Xianbing Liu, Haixia Zhang, Yuzhu Jiang, Xuemei Hu
Our current aim was to investigate whether injection of TGF-β1 played an important role in improving abnormal pregnancy outcomes with T. gondii infection and how the TGF-β1 regulated. Results showed that TGF-β1 exhibited improved pregnancy outcomes induced by T. gondii infection. dNK cytotoxicity was increased with T. gondii infection while decreased with TGF-β1 treatment. dNK cytotoxicity related NKG2D/DAP10 expression, perforin, granzyme, IFN-γ and killer subsets were all increased with T. gondii infection while decreased after TGF-β1 treatment...
July 2017: Cellular Immunology
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