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Emma L Kuan, Steven F Ziegler
Tumors actively manipulate the immune response through the production of factors that attract immune cells and subsequently alter their ability to recognize and effectively remove the tumor. While this mechanism for evading the immune system is an important aspect of tumor survival, the factors that serve as primary growth factors for the tumor are less understood. Here we demonstrate a previously unknown mechanism by which breast-cancer cells manipulate tumor-infiltrating myeloid cells to maintain their survival...
March 19, 2018: Nature Immunology
Lin Sun, Chenyang Dai, Jiayin Wu, Chen Chen, Xinyi Wu
Thymic stromal lymphopoietin (TSLP) is an IL-7-like cytokine, which is secreted by epithelial cells under the stimulation of Toll-like receptor (TLR) ligands. Dendritic cells (DCs) which express the thymic stromal lymphopoietin receptor (TSLPR) can be activated by TSLP. Mature DCs can express the OX40 ligand, which has the ability to combine with OX40 on the surface of T cells to stimulate T cell proliferation. TSLP secreted by corneal epithelial cells can engage in the process of T helper type 2 (Th2) inflammation in Aspergillus fumigatus keratitis, but the mechanism remains unclear...
March 14, 2018: Experimental Eye Research
Yrina Rochman, Krista Dienger-Stambaugh, Phoebe K Richgels, Ian P Lewkowich, Andrey V Kartashov, Artem Barski, Gurjit K Khurana Hershey, Warren J Leonard, Harinder Singh
Pathogenic T helper 2 (TH 2) cells, which produce increased amounts of the cytokines interleukin-5 (IL-5) and IL-13, promote allergic disorders, including asthma. Thymic stromal lymphopoietin (TSLP), a cytokine secreted by epithelial and innate immune cells, stimulates such pathogenic TH 2 cell responses. We found that TSLP signaling in mouse CD4+ T cells initiated transcriptional changes associated with TH 2 cell programming. IL-4 signaling amplified and stabilized the genomic response of T cells to TSLP, which increased the frequency of T cells producing IL-4, IL-5, and IL-13...
March 13, 2018: Science Signaling
Mattia P Arena, Coen Govers, Concetta Lotti, Luigi Ricciardi, Harry J Wichers, Jurriaan J Mes
More understanding of the risk-benefit effect of the glycoalkaloid tomatine is required to be able to estimate the role it might play in our diet. In this work, we focused on effects towards intestinal epithelial cells based on a Caco-2 model in order to analyze the influence on the cell monolayer integrity and on the expression levels of genes involved in cholesterol/sterol biosynthesis (LDLR), lipid metabolism (NR2F2), glucose and amino acid uptake (SGLT1, PAT1), cell cycle (PCNA, CDKN1A), apoptosis (CASP-3, BMF, KLF6), tight junctions (CLDN4, OCLN2) and cytokine-mediated signaling (IL-8, IL1β, TSLP, TNF-α)...
March 13, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
Zhaohua Shen, Changxin Zhu, Yongsheng Quan, Jinming Yang, Wei Yuan, Zhenyu Yang, Shuai Wu, Weiwei Luo, Bei Tan, Xiaoyan Wang
BACKGROUND AND AIM: To elucidate the anti-inflammatory effect and mechanism of Roseburia intestinalis (R.intestinalis) in Crohn's disease (CD). METHODS: 16S-rRNA genome sequencing technique is used to detect the characteristics of intestinal microbiota in untreated CD patients and healthy controls. Then we investigate the effects of R.intestinalis on disease activity index (DAI) score, intestinal pathology, the differentiation of Treg cells and the expressions of TSLP, TGF-β, IL-10 by using TNBS colitis models...
March 12, 2018: Journal of Gastroenterology and Hepatology
A R Khosravi, H Shokri, S Hassan Al-Heidary, F Ghafarifar
OBJECTIVE: The aims of this study were to determine the role of live and heat-killed Aspergillus fumigatus conidia in releasing interleukin (IL)-25, IL-33 and thymic stromal lymphopoietin (TSLP) and to express Toll-like receptor (Tlr)2 and Tlr4 genes. MATERIALS AND METHODS: Murine lung epithelial cells were incubated with live and heat-killed A. fumigatus conidia at 37°C for 6, 24 and 48h. After treatments, ELISA was performed to measure the concentrations of IL-25, IL-33 and TSLP in the supernatants...
March 7, 2018: Journal de Mycologie Médicale
Hajime Suto, Aya Nambu, Hideaki Morita, Sachiko Yamaguchi, Takafumi Numata, Takamichi Yoshizaki, Eri Shimura, Ken Arae, Yousuke Asada, Kenichiro Motomura, Mari Kaneko, Takaya Abe, Akira Matsuda, Yoichiro Iwakura, Ko Okumura, Hirohisa Saito, Kenji Matsumoto, Katsuko Sudo, Susumu Nakae
BACKGROUND: As well as thymic stromal lymphopoietin (TSLP) and IL-33, IL-25 is known to induce Th2 cytokine production by various cell types-including Th2 cells, Th9 cells, invariant NKT cells and group 2 innate lymphoid cells-involved in Th2-type immune responses. Since both Th2-type and Th17-type cells/cytokines are crucial for contact hypersensitivity (CHS), IL-25 may contribute to this by enhancing Th2-type immune responses. However, the precise role of IL-25 in the pathogenesis of FITC-induced CHS is poorly understood...
March 6, 2018: Journal of Allergy and Clinical Immunology
Guihua Song, Yan Zhang, Kun Zhao, Mengmeng Sun, Pengju Cheng, Jing Wang
Allergic asthma is a complex and chronic inflammatory airway disease. The thymic stromal lymphopoietin (TSLP) signaling pathway plays an important role in asthma. Xiaoqinglong Decoction (XQL) is the first choice to treat cold asthma in clinical settings. In this study, the role of the TSLP pathway in the onset of asthma and the protective mechanism of XQL were investigated. A total of 50 female mice were randomly divided into the following groups: the blank group (A), the model group (B), the XQL group (C), the dexamethasone group (D), and the XQL + dexamethasone group (E)...
February 2018: Iranian Journal of Allergy, Asthma, and Immunology
Lisa M Fahey, Prasanna M Chandramouleeswaran, Shaobo Guan, Alain J Benitez, Glenn T Furuta, Seema S Aceves, Mei-Lun Wang, Chris A Liacouras, Amanda B Muir, Patrick Ma Sleiman, Hakon Hakonarson, Jonathan M Spergel, Antonella Cianferoni
OBJECTIVES: TSLP has been shown to be associated with eosinophilic esophagitis (EoE). Specifically, children with EoE often have the nucleotides AA or AG instead of GG at the single nucleotide polymorphism position RS3806932. Presently, the phenotypic characteristics in EoE children with the TSLP EoE risk allele are unknown. METHODS: A retrospective analysis was performed of all children with EoE who had TSLP genotyping at The Children's Hospital of Philadelphia from 2008-2014...
March 6, 2018: Clinical and Translational Gastroenterology
Takahiro Hatayama, Ryosuke Segawa, Natsumi Mizuno, Sumiko Eguchi, Hiroshi Akamatsu, Misaki Fukuda, Fumihisa Nakata, Warren J Leonard, Masahiro Hiratsuka, Noriyasu Hirasawa
Many classical vaccines contain whole pathogens and, thus, may occasionally induce adverse effects, such as inflammation. Vaccines containing purified rAgs resolved this problem, but, owing to their low antigenicity, they require adjuvants. Recently, the use of several cytokines, including thymic stromal lymphopoietin (TSLP), has been proposed for this purpose. However, it is difficult to use cytokines as vaccine adjuvants in clinical practice. In this study, we examined the effects of all- trans retinoic acid (atRA) on TSLP production and Ag-induced Ab production...
March 2, 2018: Journal of Immunology: Official Journal of the American Association of Immunologists
Amelia G White, Domenico Santoro, Kim Ahrens, Rosanna Marsella
Ciclosporin (CsA) is a common treatment for canine atopic dermatitis (cAD). cAD is a very common skin disease with a multifactorial pathogenesis due to complex interactions between the host and the environment. The purpose of this study was to describe the physical and immunological effects of CsA in cAD using a canine model of AD. Fourteen beagles were enrolled; seven received CsA orally every 24 h for 28 days, and seven received placebo. All dogs were exposed to relevant allergens, house dust mite solution, one day prior to treatment and once weekly thereafter for 28 consecutive days...
March 2018: Veterinary Immunology and Immunopathology
Nick Vandeghinste, Jürgen Klattig, Catherine Jagerschmidt, Stéphanie Lavazais, Florence Marsais, Jan D Haas, Marielle Auberval, Felix Lauffer, Tara Moran, Mate Ongenaert, Maarten Van Balen, Sonia Dupont, Liên Lepescheux, Teresa Garcia, Stefan Härtle, Kilian Eyerich, Padraic G Fallon, Reginald Brys, Stefan Steidl
Interleukin-17C (IL-17C) is a functionally distinct member of the IL-17 family that was implicated to play a role in the pathogenesis of psoriasis. Here we confirmed that IL-17C is involved in psoriasis and explored potential roles for IL-17C in atopic dermatitis (AD). An anti-IL-17C antibody, MOR106, was generated that potently and selectively binds to human and mouse IL-17C, thereby inhibiting the binding of IL-17C to its IL-17RE receptor. The antibody inhibited cutaneous inflammation in an IL-23-induced psoriatic-like skin inflammation model...
February 20, 2018: Journal of Investigative Dermatology
Gabsik Yang, Hye Eun Lee, Kyung-Min Lim, Yong-Kyu Choi, Kyu-Bong Kim, Byung-Mu Lee, Joo Young Lee
Certain cosmetic colorants are irritant to skin or aggravate dermatitis. Thymic stromal lymphopoietin (TSLP) plays an important role in the initiation and progress of skin inflammation and atopic dermatitis by triggering Th2 immune responses. However, the effects of cosmetic colorants on TSLP production are unknown yet. Therefore, we investigated whether cosmetic colorants regulated TSLP production and dermatitis. Lithol Rubine B (LR-B, Pigment Red 57) and its calcium salt (LR-BCA), commonly used cosmetic colorants, potentiated phorbol-12-myristate-13-acetate-induced TSLP production in keratinocytes...
February 17, 2018: Chemico-biological Interactions
Loretta Ma, AnneMarie Gagnon, Anne Landry, Timothea Le, Fengxia Xiao, Cathy Sun, Heather A Lochnan, Dylan Burger, Alexander Sorisky
When recombinant human (rh) thyroid-stimulating hormone (TSH) is administered to thyroid cancer survivors, an acute extra-thyroidal effect raises pro-inflammatory cytokines and activates platelets. Thymic stromal lymphopoietin (TSLP) is a cytokine recently implicated in platelet activation. Our aim was to measure platelet microparticle levels after rhTSH stimulation in vivo, and to investigate TSLP expression in TSH-stimulated human adipocytes in culture. Blood samples for total and platelet microparticle analysis were obtained from thyroid cancer survivors before (day 1) and after rhTSH administration (day 5)...
February 19, 2018: Hormone and Metabolic Research, Hormon- und Stoffwechselforschung, Hormones et Métabolisme
Olivier Gouin, Killian L'Herondelle, Paul Buscaglia, Christelle Le Gall-Ianotto, Réginald Philippe, Nelig Legoux, Olivier Mignen, Virginie Buhé, Raphael Leschiera, Mehdi Sakka, Nathalie Kerfant, Jean-Luc Carré, Raphaele Le Garrec, Luc Lefeuvre, Nicolas Lebonvallet, Laurent Misery
Proteinase-activated receptor-2 (PAR-2) activation in basal keratinocytes stimulates inflammation via the Ca2+ -dependent production of mediators such as interleukin (IL)-1β, tumor necrosis factor (TNF)-α and thymic stromal lymphopoietin (TSLP). In this study, we investigated PAR-2 calcium signaling and the consequent production of inflammatory mediators in differentiated human primary keratinocytes (DhPKs). Stimulation with the PAR-2 activating peptide SLIGKV promoted Ca2+ store depletion in both undifferentiated human primary keratinocytes (UhPKs) and DhPKs...
February 16, 2018: Journal of Investigative Dermatology
Myoung-Schook Yoou, Sun-Young Nam, Kyoung Wan Yoon, Hyun-Ja Jeong, Hyung-Min Kim
Bamboo salt (BS) is a traditional Korean food, and has been reported to have anti-cancer, anti-inflammatory, and anti-metastatic effects. However, the anti-atopic dermatitis (AD) activity of BS has not been described yet. In the present study, we examined the preventive effect of BS on AD. The effect of oral administration of BS was tested in a 2, 4-dinitrofluorobenzene (DNFB)-induced AD animal model, by histological analysis, enzyme-linked immunosorbent assay, reverse transcription-polymerase chain reaction, caspase-1 assay, and Western blotting analysis...
February 2018: Chinese Journal of Natural Medicines
Yan Li, Wei Wang, Zhe Lv, Yun Li, Yan Chen, Kewu Huang, Chris J Corrigan, Sun Ying
The epithelial cytokines IL-33, thymic stromal lymphopoietin (TSLP), and IL-25 have been implicated in asthma pathogenesis because they promote Th2-type cytokine synthesis, but their expression is relatively poorly documented in "real-life" human asthma. Using bronchoalveolar lavage fluid (BALF), we measured airway concentrations of these mediators and compared them with those of Th1- and Th2-type cytokines, airway infiltration of neutrophils and eosinophils, and lung function in a large group of asthmatic patients with a range of disease severity ( n = 70) and control subjects ( n = 30)...
February 16, 2018: Journal of Immunology: Official Journal of the American Association of Immunologists
Wei Qin, Ting Deng, Haiyan Cui, Qian Zhang, Xudong Liu, Xu Yang, Mingqing Chen
Diisodecyl phthalate (DIDP) is considered to be one of the less toxic phthalates. However epidemiological studies suggest that DIDP is associated with the occurrence of asthma. The effect of DIDP exposure on allergic asthma and the underlying mechanism have not been fully elucidated. Here, mice were exposed to DIDP and sensitization with OVA. The results demonstrated that DIDP exposure aggravated allergic asthma. Exposure to 15 mg/kg/day DIDP markedly exacerbated airway remodeling and promoted airway hyperresponsiveness (AhR)...
February 12, 2018: Food and Chemical Toxicology
Masato Tamari, Keisuke Orimo, Kenichiro Motomura, Ken Arae, Akio Matsuda, Susumu Nakae, Hirohisa Saito, Hideaki Morita, Kenji Matsumoto
BACKGROUND: Direct contact of food proteins with eczematous lesions is thought to be the main cause of epicutaneous sensitization. To further investigate the development and pathogenesis of food allergy in vivo, a good mouse model of epicutaneous sensitization is needed. However, a fundamental problem in that regard is that the optimal age for epicutaneous sensitization of mice is unknown. In this study, we attempted to elucidate that optimal age. METHODS: Dorsal skin of wild-type BALB/c female mice (1, 3, 8 and 24 weeks old) was shaved, depilated and tape-stripped...
February 10, 2018: Allergology International: Official Journal of the Japanese Society of Allergology
J-P Lacour
The treatment of atopic dermatitis in adults is based on the use of topical steroids and emollients. When AD is resistant to a well-conducted topical treatment, phototherapy or systemic treatments can be used: ciclosporin, methotrexate, azathioprine or mycophenolate mofetil. The therapeutic landscape of adult AD is about to change and even be revolutionized by the imminent arrival of new treatments: topical phosphodiesterase 4 inhibitors, topical or systemic JAK inhibitors, anti-IL-4 and/or antiIL-13 biotherapies (dupilumab, tralokinumab, lebrikizumab), anti-IL-31 (nemolizumab), anti-TSLP...
December 2017: Annales de Dermatologie et de Vénéréologie
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