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https://www.readbyqxmd.com/read/28530223/tweak-mediates-inflammation-in-experimental-atopic-dermatitis-and-psoriasis
#1
Daniel Sidler, Ping Wu, Rana Herro, Meike Claus, Dennis Wolf, Yuko Kawakami, Toshiaki Kawakami, Linda Burkly, Michael Croft
Atopic dermatitis (AD) and psoriasis are driven by alternate type 2 and type 17 immune responses, but some proteins might be critical to both diseases. Here we show that a deficiency of the TNF superfamily molecule TWEAK (TNFSF12) in mice results in defective maintenance of AD-specific T helper type 2 (Th2) and psoriasis-specific Th17 cells in the skin, and impaired expression of disease-characteristic chemokines and cytokines, such as CCL17 and TSLP in AD, and CCL20 and IL-19 in psoriasis. The TWEAK receptor, Fn14, is upregulated in keratinocytes and dermal fibroblasts, and TWEAK induces these cytokines and chemokines alone and in synergy with the signature T helper cytokines of either disease, IL-13 and IL-17...
May 22, 2017: Nature Communications
https://www.readbyqxmd.com/read/28529452/estradiol-suppresses-tlr4-triggered-apoptosis-of-decidual-stromal-cells-and-drives-an-anti-inflammatory-th2-shift-by-activating-sgk1
#2
Yiyun Lou, Minhao Hu, Qijing Wang, Mu Yuan, Ning Wang, Fang Le, Lejun Li, Shisi Huang, Liya Wang, Xiangrong Xu, Fan Jin
A pro-inflammatory cytokine profile at the feto-maternal interface may predispose immune maladaptation notably in early miscarriages. We investigated the involvement of estradiol (E2)-activated serum-glucocorticoid regulated kinase 1 (SGK1) in preserving the tolerogenic and pro-survival intrauterine microenvironment beneficial to gestation maintenance. Decidual SGK1 was down-regulated in early miscarriage, consistent with the lower serum E2 concentration seen in pregnancy loss. Lipopolysaccharide (LPS)/Toll-like receptors 4 (TLR4) signaling induced apoptosis and the pro-inflammatory T helper type (TH) 1 response of decidual stromal cells (DSCs) were associated with miscarriage...
2017: International Journal of Biological Sciences
https://www.readbyqxmd.com/read/28527887/mst1-deficiency-promotes-b-cell-responses-by-cd4-t-cell-derived-il-4-resulting-in-hypergammaglobulinemia
#3
Eunchong Park, Myun Soo Kim, Ju Han Song, Kyung Min Cho, Kyung-Hye Roh, Rana Lee, Tae Sung Kim
MST1 deficiency causes T and B cell lymphopenia, resulting in combined immunodeficiency. However, MST1-deficient patients also exhibit autoimmune-like symptoms such as hypergammaglobulinemia and autoantibody production. Recent studies have shown that the autoimmune responses observed in MST1-deficient patients were most likely attributable to defective regulatory T (Treg) cells instead of intrinsic signals in MST1-lacking B cells. Nevertheless, it is not determined how MST1 deficiency in T cells breaks B cell tolerance and causes systemic autoimmune-like phenotypes...
May 17, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28527688/clinical-development-of-a-var2csa-based-placental-malaria-vaccine-pamvac-quantifying-vaccine-antigen-specific-memory-b-t-cell-activity-in-beninese-primigravidae
#4
Komi Gbédandé, Nadine Fievet, Firmine Viwami, Sem Ezinmegnon, Saadou Issifou, Jean-Philippe Chippaux, Yannelle Dossou, Kabirou Moutairou, Achille Massougbodji, Nicaise Ndam, Willem Adriaan de Jongh, T Max M Søgaard, Ali Salanti, Morten A Nielsen, Meral Esen, Benjamin Mordmüller, Philippe Deloron, Adrian J F Luty
BACKGROUND: The antigen VAR2CSA plays a pivotal role in the pathophysiology of pregnancy-associated malaria (PAM) caused by Plasmodium falciparum. A VAR2CSA-based vaccine candidate, PAMVAC, is under development by an EU-funded multi-country consortium (PlacMalVac project). As part of PAMVAC's clinical development, we quantified naturally acquired vaccine antigen-specific memory B and T cell responses in Beninese primigravidae recruited at the beginning of pregnancy and followed up to delivery and beyond...
May 17, 2017: Vaccine
https://www.readbyqxmd.com/read/28526436/intracranial-il-17a-overexpression-decreases-cerebral-amyloid-angiopathy-by-upregulation-of-abca1-in-an-animal-model-of-alzheimer-s-disease
#5
Junling Yang, Jinghong Kou, Robert Lalonde, Ken-Ichiro Fukuchi
Neuroinflammation is a pervasive feature of Alzheimer's disease (AD) and characterized by activated microglia, increased proinflammatory cytokines and/or infiltrating immune cells. T helper 17 (Th17) cells are found in AD brain parenchyma and interleukin-17A (IL-17A) is identified around deposits of aggregated amyloid β protein (Aβ). However, the role of IL-17A in AD pathogenesis remains elusive. We overexpressed IL-17A in an AD mouse model via recombinant adeno-associated virus serotype 5 (rAAV5)-mediated intracranial gene delivery...
May 16, 2017: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/28525983/polymorphisms-of-t-helper-cell-cytokine-associated-genes-and-survival-of-hemodialysis-patients-a-prospective-study
#6
Alicja E Grzegorzewska, Monika K Świderska, Adrianna Mostowska, Wojciech Warchoł, Paweł P Jagodziński
BACKGROUND: Circulating pro-inflammatory cytokines were associated with increased relative mortality risk, while immune parameters reflecting improved T-cell function were predictors of survival in hemodialysis (HD) patients. We evaluated in the prospective study whether variants in T helper cell cytokine-associated genes are determinants of mortality in HD patients. METHODS: The study was carried out in 532 prevalent HD subjects who were followed-up for 7 years...
May 19, 2017: BMC Nephrology
https://www.readbyqxmd.com/read/28523463/immature-exosomes-derived-from-microrna-146a-overexpressing-dendritic-cells-act-as-antigen-specific-therapy-for-myasthenia-gravis
#7
Weifan Yin, Song Ouyang, Zhaohui Luo, Qiuming Zeng, Bo Hu, Liqun Xu, Yuan Li, Bo Xiao, Huan Yang
Myasthenia gravis (MG) is a neurological autoimmune disease characterized by fluctuating weakness of certain voluntary muscles. Current treatments for MG are largely directed at suppressing the whole immune system by using immunosuppressants or glucocorticoids and often cause several side effects. The ideal therapeutic methods for MG should suppress aberrant immunoactivation specifically, while retaining normal function of the immune system. In this study, we first produced exosomes from microRNA-146a overexpressing dendritic cells (DCs)...
May 18, 2017: Inflammation
https://www.readbyqxmd.com/read/28523126/transforming-growth-factor-%C3%AE-a-master-regulator-of-the-gut-microbiota-and-immune-cell-interactions
#8
REVIEW
David Bauché, Julien C Marie
The relationship between host organisms and their microbiota has co-evolved towards an inter-dependent network of mutualistic interactions. This interplay is particularly well studied in the gastrointestinal tract, where microbiota and host immune cells can modulate each other directly, as well as indirectly, through the production and release of chemical molecules and signals. In this review, we define the functional impact of transforming growth factor-beta (TGF-β) on this complex interplay, especially through its modulation of the activity of local regulatory T cells (Tregs), type 17 helper (Th17) cells, innate lymphoid cells (ILCs) and B cells...
April 2017: Clinical & Translational Immunology
https://www.readbyqxmd.com/read/28522406/therapeutic-effect-of-cryptotanshinone-on-experimental-rheumatoid-arthritis-through-downregulating-p300-mediated-stat3-acetylation
#9
Ying Wang, Chun Zhou, Hui Gao, Cuixian Li, Dong Li, Peiqing Liu, Min Huang, Xiaoyan Shen, Liang Liu
BACKGROUND AND PURPOSE: The balance between T helper 17 (Th17) cells and regulatory T (Treg) cells, plays a critical role in rheumatoid arthritis (RA). The differentiation of Th17 cells requires the activation of STAT3, which determines the balance of Th17/Treg. Here, we investigated the therapeutic effect of Cryptotanshinone (CTS) on collagen induced mouse arthritis and explored the underlying mechanisms. EXPERIMENTAL APPROACH: Arthritis was induced in DBA/1 mice with bovine collagen type II and complete Freund's adjuvant...
May 15, 2017: Biochemical Pharmacology
https://www.readbyqxmd.com/read/28521477/t-cell-immunity-induced-by-a-bivalent-salmonella-based-ceacam6-and-4-1bbl-vaccines-in-a-rat-colorectal-cancer-model
#10
Chunhui Jin, Xiaoqing Duan, Yingying Liu, Jianhong Zhu, Ke Zhang, Yuanting Zhang, Tingting Xia, Yajun Fei, Jianxin Ye
The present study investigated the anti-tumor mechanisms of recombinant non-specific cross-reacting antigen (CEACAM6) and 4-1BB ligand (4-1BBL) Salmonella-based vaccines, and the effect that these vaccinations have on memory T cells and T helper (Th) cell polarization. Colon tumors were induced in rats via 1,2-dimethylhydrazine (DMH) injections. Rats were then treated with injections of attenuated Salmonella typhimurium carrying pIRES-CEACAM6, pIRES-4-1BBL or pIRES-CEACAM6-4-1BBL. In total, 4 vaccine injections, one every other week, were administered during the 8 weeks subsequent to the DMH injection...
May 2017: Oncology Letters
https://www.readbyqxmd.com/read/28518224/t-helper-1-related-molecules-as-well-as-il-15-are-hyperexpressed-in-the-skin-lesions-of-patients-with-pyoderma-gangrenosum
#11
Emiliano Antiga, Roberto Maglie, Walter Volpi, Beatrice Bianchi, Emilio Berti, Angelo Valerio Marzano, Marzia Caproni
Pyoderma gangrenosum (PG) is a rare, immune-mediated skin disease classified into the group of neutrophilic dermatoses. Whether a number of studies confirmed the central role of innate immunity, only few studies investigated the possible contributing role of acquired immunity. In particular, no reports about Th1 and Th2 cells are available yet. Therefore, 15 patients with PG, 5 with Sweet's syndrome (SS) and 9 skin specimens from healthy controls (HC) were investigated, evaluating the expression of Th1-related markers IL-12, IFN-γ, CXCR3, CCR5, of the Th2 related molecules IL-4, IL-5, IL-13 and CCR3, of the co-stimulatory axis CD40/CD40L, of IL-15 and the NK cell marker CD56 in skin lesions by immunohistochemistry...
May 18, 2017: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/28518154/il-17-%C3%AE-%C3%AE-t-cells-as-kick-starters-of-inflammation
#12
REVIEW
Pedro H Papotto, Julie C Ribot, Bruno Silva-Santos
Shortly after the discovery of interleukin 17 (IL-17)-producing CD4(+) helper T cells (TH17 cells), it was found that γδ T cells can also secrete large amounts of this pro-inflammatory cytokine. A decade later, it is now known that IL-17(+) γδ T cells (γδ17 T cells) are often the main providers of IL-17A in various models of inflammatory diseases, while they also contribute to protective immune responses to infectious organisms. Due to an intricate thymic program of differentiation, γδ17 T cells are able to respond faster than TH17 cells do and thus predominate in the early stages of inflammatory responses...
May 18, 2017: Nature Immunology
https://www.readbyqxmd.com/read/28518105/murine-lymphocyte-labeling-by-64cu-antibody-receptor-targeting-for-in-vivo-cell-trafficking-by-pet-ct
#13
Sabrina H L Hoffmann, Andreas Maurer, Dorothea I Reck, Gerald Reischl, Bernd J Pichler, Manfred Kneilling, Christoph M Griessinger
This protocol illustrates the production of (64)Cu and the chelator conjugation/radiolabeling of a monoclonal antibody (mAb) followed by murine lymphocyte cell culture and (64)Cu-antibody receptor targeting of the cells. In vitro evaluation of the radiolabel and non-invasive in vivo cell tracking in an animal model of an airway delayed-type hypersensitivity reaction (DTHR) by PET/CT are described. In detail, the conjugation of a mAb with the chelator 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid (DOTA) is shown...
April 29, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28518056/functionally-diverse-human-t-cells-recognize-non-microbial-antigens-presented-by-mr1
#14
Marco Lepore, Artem Kalinichenko, Salvatore Calogero, Pavanish Kumar, Bhairav Paleja, Mathias Schmaler, Vipin Narang, Francesca Zolezzi, Michael Poidinger, Lucia Mori, Gennaro De Libero
MHC class I-related molecule MR1 presents riboflavin- and folate-related metabolites to mucosal-associated invariant T cells, but it is unknown whether MR1 can present alternative antigens to other T cell lineages. In healthy individuals we identified MR1-restricted T cells (named MR1T cells) displaying diverse TCRs and reacting to MR1-expressing cells in the absence of microbial ligands. Analysis of MR1T cell clones revealed specificity for distinct cell-derived antigens and alternative transcriptional strategies for metabolic programming, cell cycle control and functional polarization following antigen stimulation...
May 18, 2017: ELife
https://www.readbyqxmd.com/read/28516880/abatacept-therapy-reduces-cd28-cxcr5-follicular-helper-like-t-cells-in-patients-with-rheumatoid-arthritis
#15
Shunsuke Fukuyo, Shingo Nakayamada, Shigeru Iwata, Satoshi Kubo, Kazuyoshi Saito, Yoshiya Tanaka
OBJECTIVES: The characteristics of T cells targeted by abatacept (ABT) in cases of rheumatoid arthritis (RA) are still unknown. The goal of the study was to determine the pathogenicity of T cells and the predictors of therapeutic effects of ABT. METHODS: We analysed the peripheral T cell phenotype of 34 RA patients via flow cytometry. The correlation of the phenotypes of CD4+ T cells with clinical disease activity and change in CD4+ T cell subsets at baseline and 24 weeks after ABT treatment were evaluated...
April 27, 2017: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/28516569/stat4-expression-and-activation-is-increased-during-mitosis-in-vitro-and-in-vivo-in-skin-and-mucosa-derived-cell-types-implications-in-neoplastic-and-inflammatory-skin-diseases
#16
Caterina Ferreli, Chester Lai, Suzannah August, Yvonne Buggy, Pawan Kumar, Nicola Brownlow, Peter Parker, Peter S Friedmann, Michael Ardern-Jones, Chris Pickard, Eugene Healy
BACKGROUND: The signal transducer and activator of transcription-4 (STAT4/Stat4) is a transcription factor known to convey signals from interleukin-12, interleukin-23, and interferon-alpha/beta to the nucleus, resulting in activation of dendritic cells, T-helper cell differentiation and production of interferon-gamma. OBJECTIVE: To demonstrate a novel role for STAT4 in cell mitosis. RESULTS: Phosphoserine STAT4 (pSerSTAT4) is increased in cells undergoing mitosis, and is distributed throughout the cytoplasm during this stage of the cell cycle whilst phosphotyrosine STAT4 (pTyrSTAT4) is confined to the chromosomal compartment...
May 18, 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/28515356/licensing-delineates-helper-and-effector-nk-cell-subsets-during-viral-infection
#17
Anthony E Zamora, Ethan G Aguilar, Can M Sungur, Lam T Khuat, Cordelia Dunai, G Raymond Lochhead, Juan Du, Claire Pomeroy, Bruce R Blazar, Dan L Longo, Jeffrey M Venstrom, Nicole Baumgarth, William J Murphy
Natural killer (NK) cells can be divided into phenotypic subsets based on expression of receptors that bind self-MHC-I molecules, a concept termed licensing or education. Here we show NK cell subsets with different migratory, effector, and immunoregulatory functions in dendritic cell and antigen (ag)-specific CD8+ T cell responses during influenza and murine cytomegalovirus infections. Shortly after infection, unlicensed NK cells localized in draining lymph nodes and produced GM-CSF, which correlated with the expansion and activation of dendritic cells, and resulted in greater and sustained ag-specific T cell responses...
May 18, 2017: JCI Insight
https://www.readbyqxmd.com/read/28513867/the-role-of-circulating-t-follicular-helper-cells-and-regulatory-cells-in-non-small-cell-lung-cancer-patients
#18
Zhenxing Guo, Hailong Liang, Yaru Xu, Li Liu, Xiuhong Ren, Songsong Zhang, Shenhai Wei, Peng Xu
T follicular helper (Tfh) cells and T follicular regulatory (Tfr) cells are identified as the new subset of immune cells. This study aims to investigate the role of circulating Tfh cells (cTfh) and Tfr (cTfr) cells in the pathogenesis of non-small cell lung cancer (NSCLC). A total of 27 NSCLC patients and 19 age and sex matched healthy controls were enrolled. The percentage of cTfh and cTfr was detected by flow cytometric analysis. Compared to healthy controls, a significantly higher percentage of both cTfh and cTfr cells were observed in NSCLC patients (for cTfh, 18...
May 17, 2017: Scandinavian Journal of Immunology
https://www.readbyqxmd.com/read/28513775/adiponectin-inhibits-oxidization-induced-differentiation-of-t-helper-cells-through-inhibiting-costimulatory-cd40-and-cd80
#19
Y Xiao, T Deng, Z Shang, D Wang
Adiponectin is a multifunctional adipokine that has several oligomeric forms in the blood stream, which broadly regulates innate and acquired immunity. Therefore, in this study, we aimed to observe the differentiation of T helper (Th) cells and expression of costimulatory signaling molecules affected by adiponectin. The mRNA and protein expression levels of adiponectin and its receptors in oxidized low density lipoprotein cholesterol-treated endothelial cells were assayed by real time PCR and immunofluorescence...
May 15, 2017: Brazilian Journal of Medical and Biological Research, Revista Brasileira de Pesquisas Médicas e Biológicas
https://www.readbyqxmd.com/read/28511719/interleukin-10-producing-lag3-regulatory-t-cells-are-associated-with-disease-activity-and-abatacept-treatment-in-rheumatoid-arthritis
#20
Shinichiro Nakachi, Shuji Sumitomo, Yumi Tsuchida, Haruka Tsuchiya, Masanori Kono, Rika Kato, Keiichi Sakurai, Norio Hanata, Yasuo Nagafuchi, Shoko Tateishi, Hiroko Kanda, Tomohisa Okamura, Kazuhiko Yamamoto, Keishi Fujio
BACKGROUND: Regulatory T cells (Tregs) play a role in the suppression of inflammation in autoimmune diseases, and lymphocyte activation gene 3 (LAG3) was reported as a marker of interleukin (IL)-10-producing Tregs. We aimed to clarify the function of human IL-10-producing CD4(+)CD25(-)LAG3(+) T cells (LAG3(+) Tregs) and their association with rheumatoid arthritis (RA). METHODS: LAG3(+) Tregs of human peripheral blood mononuclear cells (PBMCs) were cultured with B cells and follicular helper T cells to examine antibody suppression effects...
May 16, 2017: Arthritis Research & Therapy
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