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Proliferation t cells

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https://www.readbyqxmd.com/read/29777728/testosterone-induced-downregulation-of-migration-and-proliferation-in-human-umbilical-vein-endothelial-cells-by-androgen-receptor-dependent-and-independent-mechanisms
#1
Aulona Gaba, Mario Mairhofer, Zyhdi Zhegu, Nadja Leditznig, Ladislaus Szabo, Walter Tschugguel, Christian Schneeberger, Iveta Yotova
Recent research has emphasized the potential unfavorable effects of declining testosterone (T) levels in men and the putative beneficial effect of androgen therapy in select women. Some controversy surrounding the mechanism of action and the effects of T on endothelium remains. In this study, we evaluated the mechanism of T action on pooled primary Human Umbilical Vein Endothelial Cells (HUVEC) of mixed gender by focusing on two important processes, proliferation and migration. In our in vitro model system, we found that only the supra-physiological dose of T affected these two processes irrespective of the ratio of male to female cells in the pools...
May 16, 2018: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/29777158/mesenchymal-stem-cells-and-t-cells-in-the-formation-of-tertiary-lymphoid-structures-in-lupus-nephritis
#2
S Esmaeil Dorraji, Aud-Malin K Hovd, Premasany Kanapathippillai, Gunnstein Bakland, Gro Østli Eilertsen, Stine L Figenschau, Kristin A Fenton
Tertiary lymphoid structures (TLS) develop in the kidneys of lupus-prone mice and systemic lupus erythematosus (SLE) patients with lupus nephritis (LN). Here we investigated the presence of mesenchymal stem cells (MSCs) in the development of TLS in murine LN, as well as the role of human MSCs as lymphoid tissue organizer (LTo) cells on the activation of CD4+ T cells from three groups of donors including Healthy, SLE and LN patients. Mesenchymal stem like cells were detected within the pelvic wall and TLS in kidneys of lupus-prone mice...
May 18, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29777119/changes-in-t-cell-effector-functions-over-an-8-year-period-with-tnf-antagonists-in-patients-with-chronic-inflammatory-rheumatic-diseases
#3
Ilaria Sauzullo, Rossana Scrivo, Paola Sessa, Fabio Mengoni, Vincenzo Vullo, Guido Valesini, Claudio Maria Mastroianni
The aim of the study was to clarify the effect of long-term anti-TNF therapy on T cell function in patients with rheumatologic immune-mediated inflammatory diseases (IMID). The production of IFNγ by T cells was evaluated at baseline and after 1, 2, 4, and 8 years of anti-TNF agents by means of a QuantiFERON-TB Gold In-Tube assay. The T cell proliferation and surface co-expression of CD25/CD134 in response to phytohaemagglutinin together with the in vitro impact of anti-TNF therapy on the functional capacity of T cells were evaluated after 8 years from the onset of the biological treatment...
May 18, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29777027/t-cell-proliferation-and-colitis-are-initiated-by-defined-intestinal-microbes
#4
Pailin Chiaranunt, Justin T Tometich, Junyi Ji, Timothy W Hand
Inflammatory bowel disease has been associated with the dysregulation of T cells specific to Ags derived from the intestinal microbiota. How microbiota-specific T cells are regulated is not completely clear but is believed to be mediated by a combination of IgA, regulatory T cells, and type 3 innate lymphoid cells. To test the role of these regulatory components on microbiota-specific T cells, we bred CBir1 TCR transgenic (CBir1Tg) mice (specific to flagellin from common intestinal bacteria) onto a lymphopenic Rag1-/- background...
May 18, 2018: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29776374/the-toxoplasma-gondii-me-49-strain-upregulates-levels-of-a20-that-inhibit-nf-%C3%AE%C2%BAb-activation-and-promotes-apoptosis-in-human-leukaemia-t-cell-lines
#5
Qian Chen, Min-Hui Pang, Xiao-Hong Ye, Guang Yang, Chen Lin
BACKGROUND: Acute T-lymphocyte leukaemia is a form of haematological malignancy with abnormal activation of NF-κB pathway, which results in high expression of A20 and ABIN1, which constitute a negative feedback mechanism for the regulation of NF-κB activation. Clinical studies have found that acute T-lymphocyte leukaemia patients are susceptible to Toxoplasma gondii infection; however, the effect of T. gondii on the proliferation and apoptosis of human leukaemia T-cells remains unclear...
May 18, 2018: Parasites & Vectors
https://www.readbyqxmd.com/read/29775416/downregulation-of-the-%C3%AE-1-and-%C3%AE-1-subunit-of-sgc-in-arterial-smooth-muscle-cells-of-opscc-is-hpv-independent
#6
Y Korkmaz, H C Roggendorf, O G Siefer, J Seehawer, T Imhof, M Plomann, W Bloch, A Friebe, C U Huebbers
The nitric oxide (NO)-sensitive soluble guanylyl cyclase (sGC) is a heterodimeric enzyme with an α and β subunit. NO binds to heme of the β1 -subunit of sGC, activates the enzyme in the reduced heme iron state in vascular smooth muscle cells (VSMCs), and generates cGMP-inducing vasodilatation and suppression of VSMC proliferation. In the complex tumor milieu with higher levels of reactive oxygen species (ROS), sGC heme iron may become oxidized and insensitive to NO. To change sGC from an NO-insensitive to NO-sensitive state or NO-independent manner, protein expression of sGC in VSMC is required...
May 1, 2018: Journal of Dental Research
https://www.readbyqxmd.com/read/29775310/fragment-based-discovery-of-a-potent-orally-bioavailable-inhibitor-which-modulates-the-phosphorylation-and-catalytic-activity-of-erk1-2
#7
Tom D Heightman, Valerio Berdini, Hannah Braithwaite, Ildiko Maria Buck, Megan Cassidy, Juan Castro, Aurelie Courtin, James E H Day, Charlotte East, Lynsey Fazal, Brent Graham, Charlotte M Griffiths-Jones, John F Lyons, Vanessa Martins, Sandra Muench, Joanne M Munck, David Norton, Marc O'Reilly, Nick Palmer, Puja Pathuri, Michael Reader, David C Rees, Sharna J Rich, Caroline Richardson, Harpreet Saini, Neil T Thompson, Nicola G Wallis, Hugh Walton, Nicola E Wilsher, Alison J-A Woolford, Michael Cooke, David Cousin, Stuart Onions, Jonathan Shannon, John Watts, Christopher W Murray
Aberrant activation of the MAPK pathway drives cell proliferation in multiple cancers. Inhibitors of BRAF and MEK kinases are approved for the treatment of BRAF mutant melanoma, but resistance frequently emerges, often mediated by increased signalling through ERK1/2. Here we describe the fragment based generation of ERK1/2 inhibitors which block catalytic phosphorylation of downstream substrates such as RSK but also modulate phosphorylation of ERK1/2 by MEK without directly inhibiting MEK. X-ray crystallographic and biophysical fragment screening followed by structure-guided optimization and growth from the hinge into a pocket proximal to the C-α helix afforded highly potent ERK1/2 inhibitors with excellent kinome selectivity...
May 18, 2018: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29775163/methylprednisolone-inhibits-the-proliferation-of-endogenous-neural-stem-cells-in-nonhuman-primates-with-spinal-cord-injury
#8
Jichao Ye, Yi Qin, Yong Tang, Mengjun Ma, Peng Wang, Lin Huang, Rui Yang, Keng Chen, Chaopeng Chai, Yanfeng Wu, Huiyong Shen
OBJECTIVE The aim of this work was to investigate the effects of methylprednisolone on the proliferation of endogenous neural stem cells (ENSCs) in nonhuman primates with spinal cord injury (SCI). METHODS A total of 14 healthy cynomolgus monkeys ( Macaca fascicularis) (4-5 years of age) were randomly divided into 3 groups: the control group (n = 6), SCI group (n = 6), and methylprednisolone therapy group (n = 2). Only laminectomy was performed in the control animals at T-10. SCI was induced in monkeys using Allen's weight-drop method (50 mm × 50 g) to injure the posterior portion of the spinal cord at T-10...
May 18, 2018: Journal of Neurosurgery. Spine
https://www.readbyqxmd.com/read/29774578/the-immunobiology-of-rankl-and-myeloid-derived-suppressor-cell-activation-in-igg4-related-sclerosing-cholangitis
#9
Min Lian, Qixia Wang, Xiang Jiang, Jun Zhang, Yiran Wei, Yanmei Li, Bo Li, Weihua Chen, Haiyan Zhang, Qi Miao, Yanshen Peng, Xiao Xiao, Li Sheng, Weici Zhang, Jingyuan Fang, Ruqi Tang, M Eric Gershwin, Xiong Ma
The primary function of myeloid derived suppressor cells (MDSCs) is reflected in their immune modulatory role in several immune-mediated diseases. In IgG4-related disease (IgG4-RD), it has been hypothesized that there are selective regulatory defects that lead to a Th2 bias immune response. Herein we have taken advantage of a large cohort of patients with IgG4-related sclerosing cholangitis (IgG4-SC), the most common extra-pancreatic involvement of IgG4-RD, as well as controls consisting of primary sclerosing cholangitis (PSC), autoimmune hepatitis (AIH) and healthy volunteers, to study MDSC...
May 18, 2018: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/29774040/-oligocellula1-high-expression-of-osmotically-responsive-genes15-promotes-cell-proliferation-with-histone-deacetylase9-and-powerdress-during-leaf-development-in-arabidopsis-thaliana
#10
Marina Suzuki, Nanae Shinozuka, Tomohiro Hirakata, Miyuki T Nakata, Taku Demura, Hirokazu Tsukaya, Gorou Horiguchi
Organ size regulation is dependent on the precise spatial and temporal regulation of cell proliferation and cell expansion. A number of transcription factors have been identified that play a key role in the determination of aerial lateral organ size, but their functional relationship to various chromatin modifiers has not been well understood. To understand how leaf size is regulated, we previously isolated the oligocellula1 ( oli1 ) mutant of Arabidopsis thaliana that develops smaller first leaves than the wild type (WT) mainly due to a reduction in the cell number...
2018: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29774027/clinical-remission-of-sight-threatening-non-infectious-uveitis-is-characterized-by-an-upregulation-of-peripheral-t-regulatory-cell-polarized-towards-t-bet-and-tigit
#11
Rose M Gilbert, Xiaozhe Zhang, Robert D Sampson, Michael R Ehrenstein, Dao X Nguyen, Mahid Chaudhry, Charles Mein, Nadiya Mahmud, Grazyna Galatowicz, Oren Tomkins-Netzer, Virginia L Calder, Sue Lightman
Background: Non-infectious uveitis can cause chronic relapsing and remitting ocular inflammation, which may require high dose systemic immunosuppression to prevent severe sight loss. It has been classically described as an autoimmune disease, mediated by pro-inflammatory Th1 and Th17 T-cell subsets. Studies suggest that natural immunosuppressive CD4+ CD25+ FoxP3+ T-regulatory cells (Tregs) are involved in resolution of inflammation and may be involved in the maintenance of clinical remission...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29774026/critical-role-of-alternative-m2-skewing-in-mir-155-deletion-mediated-protection-of-colitis
#12
Jintao Li, Ji Zhang, Hongxia Guo, Shimin Yang, Weiping Fan, Nan Ye, Zhiqiang Tian, Tiantian Yu, Guoping Ai, Zigang Shen, Haiyang He, Ping Yan, Hui Lin, Xue Luo, Hongli Li, Yuzhang Wu
Inflammatory bowel disease (IBD) is associated with dysregulation of both innate and adaptive immune response in the intestine. MicroRNA (miR)-155 is frequently expressed and functions in many immune cell types. Besides its function in adaptive immunity, miR-155 is a key regulator of the innate immune response in macrophages, dendritic cells, and even in epithelia cells. Although the roles of miR-155 within T and B lymphocytes in colitis have been reported, its function in innate immune cells has not been thoroughly examined...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29773813/amelioration-of-experimental-autoimmune-encephalomyelitis-and-dss-induced-colitis-by-ntg-a-009-through-the-inhibition-of-th1-and-th17-cells-differentiation
#13
Suman Acharya, Maheshwor Timilshina, Liyuan Jiang, Sabita Neupane, Dong-Young Choi, Sang Won Park, Sang Yeul Lee, Byeong-Seon Jeong, Jung-Ae Kim, Tae-Gyu Nam, Jae-Hoon Chang
CD4+ T cells are the central for the mammalian adaptive immune system. Naïve CD4+ T cells mainly differentiate in to pro-inflammatory Th1, Th2 and Th17 cells upon antigenic stimulation. IFN-γ secreting Th1 cells and IL-17 secreting Th17 cells are found to play key roles in autoimmune diseases like multiple sclerosis (MS) and ulcerative colitis (UC). In this study we found NTG-A-009, 6-aminopyridin-3-ol, has great inhibitory effect on in vitro differentiation of Th1 and Th17 cells without affecting regulatory T cells...
May 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29773642/correction-peroxisome-proliferator-activated-receptor-ppar-%C3%AE-expression-in-t-cells-mediates-gender-differences-in-development-of-t-cell-mediated-autoimmunity
#14
Shannon E Dunn, Shalina S Ousman, Raymond A Sobel, Luis Zuniga, Sergio E Baranzini, Sawsan Youssef, Andrea Crowell, John Loh, Jorge Oksenberg, Lawrence Steinman
No abstract text is available yet for this article.
May 17, 2018: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/29773469/the-effect-of-the-deuterium-depleted-water-on-the-biological-activity-of-the-eukaryotic-cells
#15
A V Syroeshkin, N V Antipova, A V Zlatska, I A Zlatskiy, M D Skylska, T V Grebennikova, V V Goncharuk
Here we show the dependence of the unicellular biosensor S.ambigua lifespan on the water D/H isotopic composition. This dependence is bell-shaped with descents both in case of deficiency or excess of deuterium in water. The influence of the water D/H isotopic composition on the cell culture proliferative potential and colony forming efficiency in vitro was tested on the human dermal fibroblasts. We observed that the deuterium depleted water stimulates cell colony formation at the early passages. The dynamics of the cell doubling index in the deuterium depleted water-based growth medium showed higher proliferation potential compared to the water with normal isotopic composition...
May 14, 2018: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/29772686/inhibition-of-the-ccl5-ccr5-axis-against-the-progression-of-gastric-cancer
#16
REVIEW
Donatella Aldinucci, Naike Casagrande
Despite the progress made in molecular and clinical research, patients with advanced-stage gastric cancer (GC) have a bad prognosis and very low survival rates. Furthermore, it is challenging to find the complex molecular mechanisms that are involved in the development of GC, its progression, and its resistance to therapy. The interactions of chemokines, also known as chemotactic cytokines, with their receptors regulate immune and inflammatory responses. However, updated research demonstrates that cancer cells subvert the normal chemokine role, transforming them into fundamental constituents of the tumor microenvironment (TME) with tumor-promoting effects...
May 16, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29772575/therapeutic-effect-of-cd4-cd25-regulatory-t-cells-amplified-in-vitro-on-experimental-autoimmune-neuritis-in-rats
#17
Feng-Jie Wang, Dan Cui, Wei-Dong Qian
BACKGROUND/AIMS: This study aimed to explore whether the adoptive transfusion of autologous CD4+CD25+ regulatory T cells (CD4+CD25+ Tregs) has a therapeutic effect on Experimental autoimmune neuritis (EAN) model rats, and it provides new experimental and theoretical bases for the immunotherapy of Guillain-Barre syndrome (GBS). METHODS: CD4+CD25+ Tregs were sorted from the spleens of rats using immunomagnetic bead separation techniques combined with flow cytometry...
May 14, 2018: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29772429/long-non-coding-rna-nron-is-downregulated-in-hcc-and-suppresses-tumour-cell-proliferation-and-metastasis
#18
Zhicheng Yao, Zhiyong Xiong, Ruixi Li, Hao Liang, Changchang Jia, Meihai Deng
Dysregulation of long non-coding RNAs is a newly identified mechanism for tumour progression. Previous studies have suggested that the nuclear factor of activated T cells (NFAT) gene plays a very important role in cancer growth and metastasis. However, lncNRON is a newly identified repressor of NFAT, and its function is largely unknown, especially in hepatocellular carcinoma (HCC). Therefore, the expression levels of lncNRON in 215 pairs of HCC tissue were evaluated by qRT-PCR, and its relationship to clinicopathological parameters, recurrence, and survival was analysed...
May 14, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29772261/maternal-immune-activation-with-staphylococcal-enterotoxin-a-produces-unique-behavioral-changes-in-c57bl-6-mouse-offspring
#19
Ruthy Glass, Sara Norton, Nicholas Fox, Alexander W Kusnecov
Stimulation of the immune system during pregnancy, known as maternal immune activation (MIA), can cause long-lasting neurobiological and behavioral changes in the offspring. This phenomenon has been implicated in the etiology of developmental psychiatric disorders, such as autism and schizophrenia. Much of this evidence is predicated on animal models using bacterial agents such as LPS and/or viral mimics such as Poly I:C, both of which act through toll-like receptors. However, fewer studies have examined the role of direct activation of maternal T-cells during pregnancy using microbial agents...
May 14, 2018: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/29772025/shape-shifting-trypanosomes-flagellar-shortening-followed-by-asymmetric-division-in-trypanosoma-congolense-from-the-tsetse-proventriculus
#20
Lori Peacock, Christopher Kay, Mick Bailey, Wendy Gibson
Trypanosomatids such as Leishmania and Trypanosoma are digenetic, single-celled, parasitic flagellates that undergo complex life cycles involving morphological and metabolic changes to fit them for survival in different environments within their mammalian and insect hosts. According to current consensus, asymmetric division enables trypanosomatids to achieve the major morphological rearrangements associated with transition between developmental stages. Contrary to this view, here we show that the African trypanosome Trypanosoma congolense, an important livestock pathogen, undergoes extensive cell remodelling, involving shortening of the cell body and flagellum, during its transition from free-swimming proventricular forms to attached epimastigotes in vitro...
May 2018: PLoS Pathogens
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