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TNFR2

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https://www.readbyqxmd.com/read/28320838/early-immune-regulatory-changes-in-a-primary-controlled-human-plasmodium-vivax-infection-cd1c-mdc-maturation-arrest-induction-of-the-kynurenine-pathway-and-regulatory-t-cell-activation
#1
Tonia Woodberry, Jessica R Loughland, Gabriela Minigo, Julie G Burel, Fiona H Amante, Kim A Piera, Yvette McNeil, Tsin W Yeo, Michael F Good, Denise L Doolan, Christian R Engwerda, James S McCarthy, Nicholas M Anstey
Plasmodium vivax malaria remains a major public health problem. The requirements for acquisition of protective immunity to this species are not clear. Dendritic cells (DC) are essential for immune cell priming, but also perform immune-regulatory functions, along with regulatory T cells (Treg). An important function of DC involves activation of the kynurenine pathway via indoleamine 2,3-dioxygenase (IDO). Using a controlled human experimental infection study with blood-stage P. vivax, we characterised plasmacytoid DC (pDC) and myeloid DC (mDC) subset maturation, CD4(+)CD25(+)CD127(lo) Treg activation and IDO activity...
March 20, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/28303105/caloric-restriction-is-more-efficient-than-physical-exercise-to-protect-from-cisplatin-nephrotoxicity-via-ppar-alpha-activation
#2
Gabriel R Estrela, Frederick Wasinski, Rogério O Batista, Meire I Hiyane, Raphael J F Felizardo, Flavia Cunha, Danilo C de Almeida, Denise M A C Malheiros, Niels O S Câmara, Carlos C Barros, Michael Bader, Ronaldo C Araujo
The antineoplastic drug cisplatin promotes renal injury, which limits its use. Protocols that reduce renal cisplatin toxicity will allow higher doses to be used in cisplatin treatment. Here, we compare physical exercise and caloric restriction (CR) as protocols to reduce cisplatin renal injury in mice. Male C57BL/6 were divided into four groups: Control, cisplatin, exercise + cisplatin, and 30% CR + cisplatin. Animals were injected with a single dose of cisplatin (20 mg/kg i.p.) and sacrificed 96 h after injection...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28289704/preferential-tnf%C3%AE-signaling-via-tnfr2-regulates-epithelial-injury-and-duct-obstruction-in-experimental-biliary-atresia
#3
Pranavkumar Shivakumar, Tatsuki Mizuochi, Reena Mourya, Sridevi Gutta, Li Yang, Zhenhua Luo, Jorge A Bezerra
Biliary atresia is an obstructive cholangiopathy of infancy that progresses to end-stage cirrhosis. Although the pathogenesis of the disease is not completely understood, previous reports link TNFα to apoptosis of the bile duct epithelium in the presence of IFNγ. Here, we investigate if TNFα signaling regulates pathogenic mechanisms of biliary atresia. First, we quantified the expression of TNFA and its receptors TNFR1 and TNFR2 in human livers and found an increased expression of the receptors at the time of diagnosis...
March 9, 2017: JCI Insight
https://www.readbyqxmd.com/read/28276767/six-new-c-21-steroidal-glycosides-from-dregea-sinensis-hemsl
#4
Xiu-Jie Liu, Yu Shi, Shao-Hua Jia, Yu-Lin Deng, Fang Lv, Rong-Ji Dai
Six new C-21 steroidal glycosides (1-6) were separated from the root of Dregea sinensis Hemsl. and their structures were elucidated using extensive nuclear magnetic resonance, mass spectrometry, and infrared spectral analyses. Isolated compounds were evaluated for antitumor activity, which showed that compound 3 had moderate activity in Jurkat cells (IC50 19.54 ± 0.91 μM), and compounds 1-4 had significant effects against IL-2R and TNFR2 (IC50 1.518 ± 0.06 μM to 5.9 ± 0.07 μM).
February 13, 2017: Journal of Asian Natural Products Research
https://www.readbyqxmd.com/read/28256549/circulating-tnf-receptors-1-and-2-predict-mortality-in-patients-with-end-stage-renal-disease-undergoing-dialysis
#5
Tomohito Gohda, Shuntaro Maruyama, Nozomu Kamei, Saori Yamaguchi, Terumi Shibata, Maki Murakoshi, Satoshi Horikoshi, Yasuhiko Tomino, Isao Ohsawa, Hiromichi Gotoh, Shuko Nojiri, Yusuke Suzuki
Relatively high circulating levels of soluble tumor necrosis factor (TNF) receptors (TNFRs: TNFR1, TNFR2) have been associated with not only progression to end-stage renal disease but also mortality in patients with diabetes. It remains unknown whether elevated TNFR levels in haemodialysis patients are associated with mortality. We studied 319 patients receiving maintenance haemodialysis who were followed for a median of 53 months. Circulating markers of TNF pathway (TNFα and TNFRs) were measured with immunoassay...
March 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28235800/a-trimeric-structural-fusion-of-an-antagonistic-tumor-necrosis-factor-%C3%AE-mutant-enhances-molecular-stability-and-enables-facile-modification
#6
Masaki Inoue, Daisuke Ando, Haruhiko Kamada, Shintaro Taki, Mayumi Niiyama, Yohei Mukai, Takashi Tadokoro, Katsumi Maenaka, Taisuke Nakayama, Yuji Kado, Tsuyoshi Inoue, Yasuo Tsutsumi, Shin-Ichi Tsunoda
Tumor necrosis factor-α (TNF) exerts its biological effect through two types of receptors, p55 TNF receptor (TNFR1) and p75 TNF receptor (TNFR2). An inflammatory response is known to be induced mainly by TNFR1, whereas an anti-inflammatory reaction is thought to be mediated by TNFR2 in some autoimmune diseases. We have been investigating the use of an antagonistic TNF mutant (R1antTNF) to reveal the pharmacological effect of TNFR1-selective inhibition as a new therapeutic modality. Here, we aimed to further improve and optimize the activity and behavior of this mutant protein both in vitro and in vivo...
February 24, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28219639/leishmania-l-amazonensis-induces-hyperalgesia-in-balb-c-mice-contribution-of-endogenous-spinal-cord-tnf%C3%AE-and-nf%C3%AE%C2%BAb-activation
#7
Sergio M Borghi, Victor Fattori, Kenji W Ruiz-Miyazawa, Milena M Miranda-Sapla, Rúbia Casagrande, Phileno Pinge-Filho, Wander R Pavanelli, Waldiceu A Verri
Cutaneous leishmaniasis (CL) is the most common form of the leishmaniasis in humans. Ulcerative painless skin lesions are predominant clinical features of CL. Wider data indicate pain accompanies human leishmaniasis, out with areas of painless ulcerative lesions per se. In rodents, Leishmania (L.) major infection induces nociceptive behaviors that correlate with peripheral cytokine levels. However, the role of the spinal cord in pain processing after Leishmania infection has not been investigated. Balb/c mice received intraplantar (i...
February 17, 2017: Chemico-biological Interactions
https://www.readbyqxmd.com/read/28166953/mrna-expression-profile-of-the-tnf-%C3%AE-system-in-lh-induced-bovine-preovulatory-follicles-and-effects-of-tnf-%C3%AE-on-gene-expression-ultrastructure-and-expansion-of-cumulus-oocyte-complexes-cultured-in%C3%A2-vitro
#8
A W B Silva, F T G Bezerra, W G Glanzner, J T Dos Santos, A M P Dau, M T Rovani, G F Ilha, J J N Costa, E V Cunha, M A M Donato, C A Peixoto, P B D Gonçalves, V Bordignon, J R V Silva
This study evaluated (1) the effects of in vivo GnRH treatment on mRNA expression of TNF-α system (TNF-α, TNFR1 and TNFR2) in granulosa cells of bovine preovulatory follicles, (2) the in vitro influence of gonadotropins on mRNA expression of TNF-α system in cultured cumulus cells, (3) the protein expression of the TNF-α system in late antral follicles and, (4) the influence of TNF-α on cumulus cells expansion, ultrastructure and on expression of HAS2, CASP3 and CASP6 in follicular cells cultured for 24 h...
March 1, 2017: Theriogenology
https://www.readbyqxmd.com/read/28158970/tumor-necrosis-factor-alpha-inhibitors-have-no-effect-on-a-human-t-lymphotropic-virus-type-i-htlv-i-infected-cell-line-from-patients-with-htlv-i-associated-myelopathy
#9
Shoichi Fukui, Hideki Nakamura, Yoshiko Takahashi, Naoki Iwamoto, Hiroo Hasegawa, Katsunori Yanagihara, Tatsufumi Nakamura, Akihiko Okayama, Atsushi Kawakami
BACKGROUND: While tumor necrosis factor alpha (TNF-α) inhibitors (TNFi) and other biologics are very effective against autoimmune diseases, they can also cause infectious diseases. Therefore, it is important to clarify whether the TNFi sometimes used to treat patients with rheumatoid arthritis (RA) complicated with human T-lymphotropic virus type-I (HTLV-I) infection have the unintended side effect of promoting HTLV-I proliferation. METHODS: We used the HTLV-I-infected cell line HCT-5, derived from spinal fluid cells of a patient with HTLV-I associated myelopathy, to evaluate the production of cytokines and chemokines, TNF-α receptor (TNFR), the expression of HTLV-I associated genes, the HTLV-I proviral load (PVL), the expression of HTLV-I structural protein, and apoptosis...
February 3, 2017: BMC Immunology
https://www.readbyqxmd.com/read/28153935/association-of-tnf-receptor-2-and-crp-with-gfr-decline-in-the-general-nondiabetic-population
#10
Jørgen Schei, Vidar Tor Nyborg Stefansson, Bjørn Odvar Eriksen, Trond Geir Jenssen, Marit Dahl Solbu, Tom Wilsgaard, Toralf Melsom
BACKGROUND AND OBJECTIVES: Higher levels of inflammatory markers have been associated with renal outcomes in diabetic populations. We investigated whether soluble TNF receptor 2 (TNFR2) and high-sensitivity C-reactive protein (hsCRP) were associated with the age-related GFR decline in a nondiabetic population using measured GFR (mGFR). DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS: A representative sample of 1590 middle-aged people from the general population without prevalent kidney disease, diabetes, or cardiovascular disease were enrolled in the Renal Iohexol-Clearance Survey in Tromsø 6 (RENIS-T6) between 2007 and 2009...
February 2, 2017: Clinical Journal of the American Society of Nephrology: CJASN
https://www.readbyqxmd.com/read/28150360/tnfr1-and-tnfr2-differentially-mediate-tnf-%C3%AE-induced-inflammatory-responses-in-rheumatoid-arthritis-fibroblast-like-synoviocytes
#11
Hongfeng Zhang, Weiguo Xiao
TNF-α has long been implicated in the progression of rheumatoid arthritis (RA). However, how the receptors of TNF-α, namely TNFR1 and TNFR2, mediate TNF-α-induced inflammatory responses in fibroblast-like synoviocytes (FLS) in RA has not been elucidated. In the present study, primary FLS cells were isolated from RA patients and treated with TNF-α in vitro. The exogenous TNF-α induced the expression and release of endogenous TNF-α in FLS. In addition, TNF-α led to gradual downregulation of TNFR1 following 1 h treatment...
April 2017: Cell Biology International
https://www.readbyqxmd.com/read/28123565/tumor-necrosis-factor-receptor-2-promotes-growth-of-colorectal-cancer-via-the-pi3k-akt-signaling-pathway
#12
Tao Zhao, Huihui Li, Zifeng Liu
Tumor necrosis factor receptor 2 (TNFR2) is the receptor for tumor necrosis factor α (TNF-α). TNFR2 differs from tumor necrosis factor 1 (TNFR1) in various ways and is mainly expressed in hematopoietic and endothelial cells. However, studies about its functions in tumors are limited. The contributions of TNFR2 in colorectal cancer (CRC) remain unknown. In the present study, it was found that TNFR2 was positively associated with Ki67 expression in CRC tissues using immunohistochemistry (IHC), and western blot analysis found that Ki67 was upregulated by overexpressing TNFR2 in SW1116 cells and inhibited by silencing TNFR2 in HT29 cells...
January 2017: Oncology Letters
https://www.readbyqxmd.com/read/28122773/adam17-a-molecular-switch-to-control-tnfr2-during-atherogenesis-in-vivo
#13
EDITORIAL
Yiting Jia, Wei Kong
No abstract text is available yet for this article.
February 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/28104869/locking-tnfr2-to-kill-ovarian-cancer
#14
EDITORIAL
Leslie K Ferrarelli
No abstract text is available yet for this article.
January 20, 2017: Science
https://www.readbyqxmd.com/read/28096513/targeting-tnfr2-with-antagonistic-antibodies-inhibits-proliferation-of-ovarian-cancer-cells-and-tumor-associated-tregs
#15
Heather Torrey, John Butterworth, Toshiyuki Mera, Yoshiaki Okubo, Limei Wang, Danielle Baum, Audrey Defusco, Sara Plager, Sarah Warden, Daniel Huang, Eva Vanamee, Rosemary Foster, Denise L Faustman
Major barriers to cancer therapy include the lack of selective inhibitors of regulatory T cells (Tregs) and the lack of broadly applicable ways to directly target tumors through frequently expressed surface oncogenes. Tumor necrosis factor receptor 2 (TNFR2) is an attractive target protein because of its restricted abundance to highly immunosuppressive Tregs and oncogenic presence on human tumors. We characterized the effect of TNFR2 inhibition using antagonistic antibodies. In culture-based assays, we found that two TNFR2 antagonists inhibited Treg proliferation, reduced soluble TNFR2 secretion from normal cells, and enabled T effector cell expansion...
January 17, 2017: Science Signaling
https://www.readbyqxmd.com/read/28096506/targeting-tnfr2-an-immune-checkpoint-stimulator-and-oncoprotein-is-a-promising-treatment-for-cancer
#16
REVIEW
Xin Chen, Joost J Oppenheim
Tumor necrosis factor receptor 2 (TNFR2) is expressed both by some cancer cells and by tumor-infiltrating immunosuppressive CD4(+)FoxP3(+) regulatory T cells (Tregs). TNFR2 stimulates the activation and proliferation of Tregs, a major checkpoint of antitumor immune responses, and promotes cancer cell survival and tumor growth. In this issue of Science Signaling, Torrey et al found that dominant antagonistic antibodies against human TNFR2 may be a potential therapy for ovarian cancer patients by simultaneously suppressing Treg activity and inducing the death of the cancer cells...
January 17, 2017: Science Signaling
https://www.readbyqxmd.com/read/28092866/transmembrane-tumor-necrosis-factor-%C3%AE-promotes-the-recruitment-of-mdscs-to-tumor-tissue-by-upregulating-cxcr4-expression-via-tnfr2
#17
Hongping Ba, Baihua Li, Xiaoyan Li, Cheng Li, Anlin Feng, Yazhen Zhu, Jing Wang, Zhuoya Li, Bingjiao Yin
Myeloid-derived suppressor cells (MDSCs) accumulated in tumor sites promote immune evasion. We found that TNFR deficiency-induced rejection of transplanted tumor was accompanied with markedly decreased accumulation of MDSCs. However, the mechanism(s) behind this phenomenon is not completely understood. Here, we demonstrated that TNFR deficiency did not affect the amount of MDSCs in bone marrow (BM), but decreased accumulation of Gr-1(+)CD11b(+) MDSCs in the spleen and tumor tissues. The chemotaxis of Tnfr(-/-) MDSCs was prominently decreased in response to both tumor cell culture supernatants and tumor tissue homogenates from Tnfr(-/-) and wild-type mice, indicating an effect of TNFR signaling on chemokine receptor expression in MDSCs...
January 13, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/28062509/adam17-deficiency-promotes-atherosclerosis-by-enhanced-tnfr2-signaling-in-mice
#18
Alexandros Nicolaou, Zhen Zhao, Bernd H Northoff, Kristina Sass, Andreas Herbst, Alexander Kohlmaier, Athena Chalaris, Christian Wolfrum, Christian Weber, Sabine Steffens, Stefan Rose-John, Daniel Teupser, Lesca M Holdt
OBJECTIVE: ADAM17 (a disintegrin and metalloproteinase 17) is a sheddase releasing different types of membrane-bound proteins, including adhesion molecules, cytokines, and their receptors as well as inflammatory mediators. Because these substrates modulate important mechanisms of atherosclerosis, we hypothesized that ADAM17 might be involved in the pathogenesis of this frequent disease. APPROACH AND RESULTS: Because Adam17-knockout mice are not viable, we studied the effect of Adam17 deficiency on atherosclerosis in Adam17 hypomorphic mice (Adam17(ex/ex)), which have low residual Adam17 expression...
December 22, 2016: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/28054230/tumor-necrosis-factor-alpha-and-pregnancy-focus-on-biologics-an-updated-and-comprehensive-review
#19
REVIEW
Jaume Alijotas-Reig, Enrique Esteve-Valverde, Raquel Ferrer-Oliveras, Elisa Llurba, Josep Maria Gris
Tumor necrosis factor-α (TNF-α) is a central regulator of inflammation, and TNF-α antagonists may be effective in treating inflammatory disorders in which TNF-α plays a major pathogenic role. TNF-α has also been associated with inflammatory mechanisms related to implantation, placentation, and pregnancy outcome. TNF-α is secreted by immune cells and works by binding to TNFR1 and TNFR2 cell receptors. TNF-α is also related to JAK/STAT pathways, which opens up hypothetical new targets for modifying. The accurate balance between Th1 cytokines, mainly TNF-α, Th17, and Th2, particularly IL-10 is essential to achieve good obstetric outcomes...
January 4, 2017: Clinical Reviews in Allergy & Immunology
https://www.readbyqxmd.com/read/28052249/opposing-functions-of-microglial-and-macrophagic-tnfr2-in-the-pathogenesis-of-experimental-autoimmune-encephalomyelitis
#20
Han Gao, Matt C Danzi, Claire S Choi, Mehran Taherian, Camilla Dalby-Hansen, Ditte G Ellman, Pernille M Madsen, John L Bixby, Vance P Lemmon, Kate L Lambertsen, Roberta Brambilla
In multiple sclerosis (MS), soluble tumor necrosis factor (TNF) is detrimental via activation of TNF receptor 1 (TNFR1), whereas transmembrane TNF is beneficial primarily by activating TNF receptor 2 (TNFR2). Here, we investigate the role of TNFR2 in microglia and monocytes/macrophages in experimental autoimmune encephalomyelitis (EAE), a model of MS, by cell-specific gene targeting. We show that TNFR2 ablation in microglia leads to early onset of EAE with increased leukocyte infiltration, T cell activation, and demyelination in the central nervous system (CNS)...
January 3, 2017: Cell Reports
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