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Th17 cells

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https://www.readbyqxmd.com/read/28231307/differential-regulation-of-c5a-receptor-1-in-innate-immune-cells-during-the-allergic-asthma-effector-phase
#1
Fanny Ender, Anna V Wiese, Inken Schmudde, Jing Sun, Tillman Vollbrandt, Peter König, Yves Laumonnier, Jörg Köhl
C5a drives airway constriction and inflammation during the effector phase of allergic asthma, mainly through the activation of C5a receptor 1 (C5aR1). Yet, C5aR1 expression on myeloid and lymphoid cells during the allergic effector phase is ill-defined. Recently, we generated and characterized a floxed green fluorescent protein (GFP)-C5aR1 knock-in mouse. Here, we used this reporter strain to monitor C5aR1 expression in airway, pulmonary and lymph node cells during the effector phase of OVA-driven allergic asthma...
2017: PloS One
https://www.readbyqxmd.com/read/28230011/changes-of-cd4-t-cell-subsets-after-radiofrequency-ablation-in-lung-cancer-and-its-significance
#2
Wang Shaobin, Xiong Yu, Lin Jiatian, Chen Zaizhong, Dai Luping, Chen Junhui
AIMS: To analyze the changes of CD4+ T-cell subsets following radiofrequency ablation (RFA) in lung cancer and the impact of RFA on the antitumor immunity. SUBJECTS AND METHODS: Flow cytometry was employed to detect CD4+ T-cell subsets in the peripheral blood from 45 healthy controls and 45 lung cancer patients before and after RFA. The correlation between CD4+ T-cell subsets and the clinical characteristics was discussed by comparing the results between different groups...
December 2016: Journal of Cancer Research and Therapeutics
https://www.readbyqxmd.com/read/28229025/effect-of-interleukin-il-35-on-il-17-expression-and-production-by-human-cd4-%C3%A2-t-cells
#3
Kosuke Okada, Takeki Fujimura, Takeshi Kikuchi, Makoto Aino, Yosuke Kamiya, Ario Izawa, Yuki Iwamura, Hisashi Goto, Iichiro Okabe, Eriko Miyake, Yoshiaki Hasegawa, Makio Mogi, Akio Mitani
BACKGROUND: Interleukin (IL)-17 produced by mainly T helper 17 (Th17) cells may play an important destructive role in chronic periodontitis (CP). Thus, anti-inflammatory cytokines, such as IL-35, might have a beneficial effect in periodontitis by inhibiting differentiation of Th17 cells. Th17 differentiation is regulated by the retinoic acid receptor-related orphan receptor (ROR) α (encoded by RORA) and RORγt (encoded by RORC). However, the role of IL-35 in periodontitis is not clear and the effect of IL-35 on the function of Th17 cells is still incompletely understood...
2017: PeerJ
https://www.readbyqxmd.com/read/28228602/a-divergent-population-of-autoantigen-responsive-cd4-t-cells-in-infants-prior-to-%C3%AE-cell-autoimmunity
#4
Anne-Kristin Heninger, Anne Eugster, Denise Kuehn, Florian Buettner, Matthias Kuhn, Annett Lindner, Sevina Dietz, Sibille Jergens, Carmen Wilhelm, Andreas Beyerlein, Anette-G Ziegler, Ezio Bonifacio
Autoimmune diabetes is marked by sensitization to β cell self-antigens in childhood. We longitudinally followed at-risk children from infancy and performed single-cell gene expression in β cell antigen-responsive CD4(+) T cells through pre- and established autoimmune phases. A striking divergence in the gene signature of β cell antigen-responsive naïve CD4(+) T cells from children who developed β cell autoimmunity was found in infancy, well before the appearance of β cell antigen-specific memory T cells or autoantibodies...
February 22, 2017: Science Translational Medicine
https://www.readbyqxmd.com/read/28228555/microrna-15b-suppresses-th17-differentiation-and-is-associated-with-pathogenesis-of-multiple-sclerosis-by-targeting-o-glcnac-transferase
#5
Ruiqiong Liu, Xiaofeng Ma, Li Chen, Yang Yang, Yi Zeng, Jie Gao, Wei Jiang, Fang Zhang, Daojing Li, Bin Han, Ranran Han, Rongfang Qiu, Wei Huang, Yan Wang, Junwei Hao
IL-17-producing Th17 cells have gradually become considered as key factors in the pathogenesis of many autoimmune diseases, including multiple sclerosis (MS). Although the involvement of certain microRNAs in the development of MS has been reported, their role in Th17-driven autoimmunity is still poorly understood. In this study, we identified microRNA (miR)-15b as an important factor in Th17-associated effects and determined that the expression of miR-15b is significantly downregulated in MS patients and in mice with experimental autoimmune encephalomyelitis...
February 22, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28225165/the-contrasting-role-of-th17-immunity-in-human-health-and-disease
#6
Edwin Hoe, Jeremy Anderson, Jordan Nathanielsz, Zheng Quan Toh, Rachel Marimla, Anne Balloch, Paul V Licciardi
The human immune system is a tightly regulated network that protects the host from disease. An important aspect of this is the balance between pro-inflammatory Th17 cells and anti-inflammatory Treg cells in maintaining immune homeostasis. Foxp3+ Treg are critical for sustaining immune tolerance through IL-10 and TGF-β while RORγt+ Th17 cells promote immunopathology and auto-inflammatory diseases through the actions of IL-17A, IL-21 and IL-22. Therefore, the imbalance between Treg and Th17 cells can result in serious pathology in many organs and tissues in the body...
February 22, 2017: Microbiology and Immunology
https://www.readbyqxmd.com/read/28224733/nk1-1-cd4-nkg2d-t-cells-suppress-dss-induced-colitis-in-mice-through-production-of-tgf-%C3%AE
#7
Xingxing Qian, Chunxia Hu, Sen Han, Zhijie Lin, Weiming Xiao, Yanbing Ding, Yu Zhang, Li Qian, Xiaoqing Jia, Guoqiang Zhu, Weijuan Gong
CD4(+) NKG2D(+) T cells are associated with tumour, infection and autoimmune diseases. Some CD4(+) NKG2D(+) T cells secrete IFN-γ and TNF-α to promote inflammation, but others produce TGF-β and FasL to facilitate tumour evasion. Here, murine CD4(+) NKG2D(+) T cells were further classified into NK1.1(-) CD4(+) NKG2D(+) and NK1.1(+) CD4(+) NKG2D(+) subpopulations. The frequency of NK1.1(-) CD4(+) NKG2D(+) cells decreased in inflamed colons, whereas more NK1.1(+) CD4(+) NKG2D(+) cells infiltrated into colons of mice with DSS-induced colitis...
February 22, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/28223515/rational-design-of-adjuvants-targeting-the-c-type-lectin-mincle
#8
Alexiane Decout, Sandro Silva-Gomes, Daniel Drocourt, Sophie Barbe, Isabelle André, Francisco J Cueto, Thierry Lioux, David Sancho, Eric Pérouzel, Alain Vercellone, Jacques Prandi, Martine Gilleron, Gérard Tiraby, Jérôme Nigou
The advances in subunit vaccines development have intensified the search for potent adjuvants, particularly adjuvants inducing cell-mediated immune responses. Identification of the C-type lectin Mincle as one of the receptors underlying the remarkable immunogenicity of the mycobacterial cell wall, via recognition of trehalose-6,6'-dimycolate (TDM), has opened avenues for the rational design of such molecules. Using a combination of chemical synthesis, biological evaluation, molecular dynamics simulations, and protein mutagenesis, we gained insight into the molecular bases of glycolipid recognition by Mincle...
February 21, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28223414/the-flavonoid-cyanidin-blocks-binding-of-the-cytokine-interleukin-17a-to-the-il-17ra-subunit-to-alleviate-inflammation-in-vivo
#9
Caini Liu, Liang Zhu, Koichi Fukuda, Suidong Ouyang, Xing Chen, Chenhui Wang, Cun-Jin Zhang, Bradley Martin, Chunfang Gu, Luke Qin, Suguna Rachakonda, Mark Aronica, Jun Qin, Xiaoxia Li
Cyanidin, a key flavonoid that is present in red berries and other fruits, attenuates the development of several diseases, including asthma, diabetes, atherosclerosis, and cancer, through its anti-inflammatory effects. We investigated the molecular basis of cyanidin action. Through a structure-based search for small molecules that inhibit signaling by the proinflammatory cytokine interleukin-17A (IL-17A), we found that cyanidin specifically recognizes an IL-17A binding site in the IL-17A receptor subunit (IL-17RA) and inhibits the IL-17A/IL-17RA interaction...
February 21, 2017: Science Signaling
https://www.readbyqxmd.com/read/28223102/inflammatory-cytokines-il-17-and-tnf-%C3%AE-up-regulate-pd-l1-expression-in-human-prostate-and-colon-cancer-cells
#10
Xun Wang, Lingyun Yang, Feng Huang, Qiuyang Zhang, Sen Liu, Lin Ma, Zongbing You
Programmed cell death protein 1 (PD-1) acts on PD-1 ligands (PD-L1 and PD-L2) to suppress activation of cytotoxic T lymphocytes. Interleukin-17 (IL-17) and tumor necrosis factor-α (TNF-α) are co-expressed by T helper 17 (TH17) cells in many tumors. The purpose of this study was to test if IL-17 and TNF-α may synergistically induce PD-L1 expression in human prostate cancer LNCaP and human colon cancer HCT116 cell lines. We found that IL-17 did not induce PD-L1 mRNA expression, but up-regulated PD-L1 protein expression in HCT116 and LNCaP cells...
February 13, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28222146/cytotoxic-effector-functions-of-t-cells-are-not-required-for-protective-immunity-against-fatal-rickettsia-typhi-infection-in-a-murine-model-of-infection-role-of-th1-and-th17-cytokines-in-protection-and-pathology
#11
Kristin Moderzynski, Liza Heine, Jessica Rauch, Stefanie Papp, Svenja Kuehl, Ulricke Richardt, Bernhard Fleischer, Anke Osterloh
Endemic typhus caused by Rickettsia (R.) typhi is an emerging febrile disease that can be fatal due to multiple organ pathology. Here we analyzed the requirements for protection against R. typhi by T cells in the CB17 SCID model of infection. BALB/c wild-type mice generate CD4+ TH1 and cytotoxic CD8+ T cells both of which are sporadically reactivated in persistent infection. Either adoptively transferred CD8+ or CD4+ T cells protected R. typhi-infected CB17 SCID mice from death and provided long-term control...
February 21, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28220116/cpg-odn-shapes-alum-adjuvant-activity-signaling-via-myd88-and-il-10
#12
Luciana Mirotti, Ricardo Wesley Alberca Custódio, Eliane Gomes, Florencia Rammauro, Eliseu Frank de Araujo, Vera Lucia Garcia Calich, Momtchilo Russo
Aluminum-containing adjuvants usually referred as Alum are considered as T helper type-2 (Th2) adjuvants, while agonists of toll-like receptors (TLRs) are viewed as adjuvants that favor Th1/Th17 immunity. Alum has been used in numerous vaccine formulations; however, its undesired pro-Th2 adjuvant activity constitutes a caveat for Alum-based vaccines. Combining Alum with TLR-dependent, pro-Th1/Th17 adjuvants might dampen the pro-Th2 activity and improve the effectiveness of vaccine formulations. Here, using the ovalbumin (OVA) model of allergic lung inflammation, we found that sensitization with the synthetic TLR9 agonist, which is composed of oligodeoxynucleotides containing CpG motifs adsorbed to Alum, inhibited the development of OVA-induced lung allergic Th2 responses without shifting toward a Th1 pattern...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28218451/specific-inulin-type-fructan-fibers-protect-against-autoimmune-diabetes-by-modulating-gut-immunity-barrier-function-and-microbiota-homeostasis
#13
Kang Chen, Hao Chen, Marijke M Faas, Bart J de Haan, Jiahong Li, Ping Xiao, Hao Zhang, Julien Diana, Paul de Vos, Jia Sun
SCOPE: Dietary fibers capable of modifying gut barrier and microbiota homeostasis, affect the progression of type 1 diabetes (T1D). Here we aim to compare modulatory effects of inulin-type fructans (ITFs), natural soluble dietary fibers with different degrees of fermentability from chicory root, on T1D development in non-obese diabetic (NOD) mice. METHODS AND RESULTS: Female NOD mice were weaned to long and short chain ITFs [ITF(l) and ITF(s), 5%] supplemented diet up to 24 weeks...
February 20, 2017: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/28216651/deficiency-of-the-g-protein-g%C3%AE-q-ameliorates-experimental-autoimmune-encephalomyelitis-with-impaired-dc-derived-il-6-production-and-th17-differentiation
#14
Weiming Lai, Yingying Cai, Jinfeng Zhou, Shuai Chen, Chaoyan Qin, Cuixia Yang, Junling Liu, Xin Xie, Changsheng Du
Many G protein-coupled receptors (GPCRs) are reported to be involved in the pathogenesis of multiple sclerosis (MS), and ~40% of all identified GPCRs rely on the Gαq/11 G protein family to stimulate inositol lipid signaling. However, the function of Gα subunits in MS pathogenesis is still unknown. In this study, we attempted to determine the role of Gαq in the pathogenesis of experimental autoimmune encephalomyelitis (EAE), a well-known mouse model of MS. We discovered that compared with wild-type mice, Gαq-knockout mice exhibited less severe EAE symptoms, with lower clinical scores, reduced leukocyte infiltration and less extensive demyelination...
February 20, 2017: Cellular & Molecular Immunology
https://www.readbyqxmd.com/read/28216500/-effect-of-il-1%C3%AE-or-tnf-%C3%AE-treated-human-decidual-cells-on-balance-between-th1-and-th2-or-th17-and-treg-immunity
#15
Xianqing Wu, Xiaoling Fang, Meifang Nie, Hui Ding, Xiaomeng Xia
To investigate the effect of IL-1β or TNF-α-treated human decidual cells on the balance between Th1 and Th2 or Th17 and Treg.
 Methods: Human decidual cells were isolated and treated with estrogen (E2) and progesterone (P) for 7 days and then with IL-1β or TNF-α for 24 h. The culture medium was collected to prepare conditioned medium. The T cells isolated from human decidual tissue were cultured in presence of conditioned medium for 72 h. ELISA was used to detect concentration of IFN-γ, IL-2, IL-5, IL-17 IL-10, and TGF-1β in supernatants and quantitative real-time PCR was used to detect the mRNA expression of IFN-γ, IL-17, IL-10, and TGF-1β...
January 28, 2017: Zhong Nan da Xue Xue Bao. Yi Xue Ban, Journal of Central South University. Medical Sciences
https://www.readbyqxmd.com/read/28215223/the-functional-stability-of-foxp3-and-ror%C3%AE-t-in-treg-and-th17-and-their-therapeutic-applications
#16
J Ren, B Li
The balance of CD4(+)CD25(+)FOXP3(+) regulatory T cells (Tregs) and effector T cells plays a key role in maintaining immune homeostasis, while the imbalance of them is related to many inflammatory diseases in both human and mice. Here we discuss about the plasticity of Tregs and Th17 cells, and the related human diseases resulted from the imbalance of them. Further, we will focus on the mechanisms regulating the plasticity between Tregs and Th17 cells and the potential therapeutic strategies by targeting regulators of the expression and activity of FOXP3 and RORγt or regulators of Treg/Th17 balance in autoimmune diseases, allergy, infection, and cancer...
2017: Advances in Protein Chemistry and Structural Biology
https://www.readbyqxmd.com/read/28213589/sh479-a-betulinic-acid-derivative-ameliorates-experimental-autoimmune-encephalomyelitis-by-regulating-the-th17-treg-balance
#17
Jing Li, Ji Jing, Yang Bai, Zhen Li, Roumei Xing, Binhe Tan, Xueyun Ma, Wenwei Qiu, Changsheng Du, Bing Du, Fan Yang, Jie Tang, Stefan Siwko, Mingyao Liu, Huaqing Chen, Jian Luo
CD4+ T helper cells, especially Th17 cells, combined with immune regulatory network dysfunction, play key roles in autoimmune diseases including multiple sclerosis (MS). Betulinic acid (BA), a natural pentacyclic triterpenoid, has been reported to be involved in anti-inflammation, in particular having an inhibitory effect on pro-inflammatory cytokine IL-17 and IFN-γ production. In this study, we screened BA derivatives and found a BA derivative, SH479, which had a greater inhibitory effect on Th17 differentiation...
February 17, 2017: Molecular Pharmacology
https://www.readbyqxmd.com/read/28212864/gpr43-activation-enhances-psoriasis-like-inflammation-through-epidermal-upregulation-of-il-6-and-dual-oxidase-2-signaling-in-a-murine-model
#18
Ahmed Nadeem, Sheikh F Ahmad, Naif O Al-Harbi, Ahmed M El-Sherbeeny, Mohammed M Al-Harbi, Talal S Almukhlafi
The gut is densely inhabited by commensal bacteria, which metabolize dietary fibers/undigested carbohydrates and produce short-chain fatty acids such as acetate. GPR43 is one of the receptors to sense short-chain fatty acids, and expressed in various immune and non-immune cells. Acetate/GPR43 signaling has been shown to affect various inflammatory diseases through Th17 responses and NADPH oxidase (NOX)-derived reactive oxygen species (ROS) generation. However, no study has previously explored the effects of GPR43 activation during psoriasis-like inflammation...
February 14, 2017: Cellular Signalling
https://www.readbyqxmd.com/read/28212793/mir-634-is-a-pol-iii-dependent-intronic-microrna-regulating-alternative-polyadenylated-isoforms-of-its-host-gene-prkca
#19
Elvezia Maria Paraboschi, Giulia Cardamone, Valeria Rimoldi, Stefano Duga, Giulia Soldà, Rosanna Asselta
BACKGROUND: The protein kinase C alpha (PRKCA) gene, coding for a Th17-cell-selective kinase, shows a complex splicing pattern, with at least 2 stable alternative transcripts characterized by an alternative upstream polyadenylation site. Polymorphisms in this gene were associated with several conditions, including multiple sclerosis, asthma, schizophrenia, and cancer. The presence of a microRNA (miRNA), i.e. miR-634, within intron 15 of the PRKCA gene, suggests the intriguing possibility that this miRNA might play a role in the susceptibility to these pathologies...
February 14, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28212158/an-integrated-understanding-of-the-immunology-of-allograft-inflammation
#20
Brenna Houlihan, Priscilla Cha, Michael Zasloff, Thomas M Fishbein, Alexander Kroemer
PURPOSE OF REVIEW: The purpose of this review is to summarize recent advances in our understanding of the complex immunology of intestinal transplantation and allograft rejection. RECENT FINDINGS: Recent findings highlight the importance of the intestinal microbiome for intestinal homeostasis and the role of newly discovered innate lymphoid cells in intestinal transplantation. In addition, the role of host antimicrobial Th17 responses in the pathogenesis of inflammatory bowel diseases and intestinal allograft rejection has been further elucidated...
February 15, 2017: Current Opinion in Organ Transplantation
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