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https://www.readbyqxmd.com/read/29273672/cd1a-presentation-of-endogenous-antigens-by-group-2-innate-lymphoid-cells
#1
Clare S Hardman, Yi-Ling Chen, Maryam Salimi, Rachael Jarrett, David Johnson, Valtteri J Järvinen, Raymond J Owens, Emmanouela Repapi, David J Cousins, Jillian L Barlow, Andrew N J McKenzie, Graham Ogg
Group 2 innate lymphoid cells (ILC2) are effectors of barrier immunity, with roles in infection, wound healing, and allergy. A proportion of ILC2 express MHCII (major histocompatibility complex II) and are capable of presenting peptide antigens to T cells and amplifying the subsequent adaptive immune response. Recent studies have highlighted the importance of CD1a-reactive T cells in allergy and infection, activated by the presentation of endogenous neolipid antigens and bacterial components. Using a human skin challenge model, we unexpectedly show that human skin-derived ILC2 can express CD1a and are capable of presenting endogenous antigens to T cells...
December 22, 2017: Science Immunology
https://www.readbyqxmd.com/read/29222519/virtual-screening-for-inhibitors-of-the-human-tslp-tslpr-interaction
#2
Dries Van Rompaey, Kenneth Verstraete, Frank Peelman, Savvas N Savvides, Koen Augustyns, Pieter Van Der Veken, Hans De Winter
The pro-inflammatory cytokine thymic stromal lymphopoietin (TSLP) plays a pivotal role in the pathophysiology of various allergy disorders that are mediated by type 2 helper T cell (Th2) responses, such as asthma and atopic dermatitis. TSLP forms a ternary complex with the TSLP receptor (TSLPR) and the interleukin-7-receptor subunit alpha (IL-7Rα), thereby activating a signaling cascade that culminates in the release of pro-inflammatory mediators. In this study, we conducted an in silico characterization of the TSLP:TSLPR complex to investigate the drugability of this complex...
December 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29179209/calycosin-suppresses-epithelial-derived-initiative-key-factors-and-maintains-epithelial-barrier-in-allergic-inflammation-via-tlr4-mediated-nf-%C3%AE%C2%BAb-pathway
#3
Yu Tao, Yan Wang, Xiaoyu Wang, Can Wang, Kaifang Bao, Lv Ji, Guorong Jiang, Min Hong
BACKGROUND/AIMS: Calycosin is a bioactive component of Astragali Radix, a Chinese herb for treating allergy. We have previously demonstrated that calycosin effectively inhibited allergic inflammation efficiently. The aim of this study was to explore the mechanism of calycosin on epithelial cells in allergic inflammation. METHODS: An initial stage of atopic dermatitis (AD) model in which mice were just sensitized with FITC, was established in vivo and immortalized human keratinocytes (HaCaT cells) were utilized in vitro...
November 27, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29067997/il-33-promotes-gastrointestinal-allergy-in-a-tslp-independent-manner
#4
H Han, F Roan, L K Johnston, D E Smith, P J Bryce, S F Ziegler
HASH(0x2fdb888)
October 25, 2017: Mucosal Immunology
https://www.readbyqxmd.com/read/28953906/analysis-of-chromatin-accessibility-in-human-epidermis-identifies-putative-barrier-dysfunction-sensing-enhancers
#5
Julie M Lander, Dorothy M Supp, Hua He, Lisa J Martin, Xiaoting Chen, Matthew T Weirauch, Steven T Boyce, Raphael Kopan
To identify putative gene regulatory regions that respond to epidermal injury, we mapped chromatin dynamics in a stratified human epidermis during barrier maturation and disruption. Engineered skin substitutes (ESS) cultured at the air-liquid interface were used as a model of developing human epidermis with incomplete barrier formation. The epidermal barrier stabilized following engraftment onto immunocompromised mice, and was compromised again upon injury. Modified formaldehyde-assisted isolation of regulatory elements (FAIRE) was used to identify accessible genomic regions characteristic of monolayer keratinocytes, ESS in vitro, grafted ESS, and tape-stripped ESS graft...
2017: PloS One
https://www.readbyqxmd.com/read/28917991/enhanced-expression-of-pd-l1-and-ifn-%C3%AE-on-dendritic-cells-is-associated-with-bcg-induced-th2-inhibition
#6
A C C Gouveia, F G Braga, M Mota, F M C Silva, A S S Brugiolo, E E Oliveira, M C Ayupe, H C Teixeira, A P Ferreira
Accumulating evidence indicates that the exposure to Mycobacterium bovis bacillus Calmette-Guérin (BCG) prevents the development of allergy and the airway dendritic cells (DCs) may be involved in this protective effect. However, studies to better characterize the specific interactions between BCG and DCs and their role in this mycobacteria-mediated Th2 cell suppression are still ongoing. This study aimed to evaluate the effect of the neonatal BCG vaccination in the innate immune response in a mouse model of ovalbumin (OVA)-induced airway inflammation...
September 14, 2017: Cytokine
https://www.readbyqxmd.com/read/28861617/novel-therapeutic-approaches-to-atopic-dermatitis
#7
REVIEW
Katarzyna Osinka, Karolina Dumycz, Bartłomiej Kwiek, Wojciech Feleszko
Atopic dermatitis (AD) is one of the most common inflammatory skin diseases. The number of people affected by AD is relatively high and seems to be rising. Although mild and moderate forms of the disease can be well controlled by the use of emollients, topical corticosteroids, and topical calcineurin inhibitors, treatment of severe is still a huge challenge. The new hope is biologic drugs, magic bullets in allergy, targeted at different points of the complex pathomechanism of inflammation in AD. In this review, novel biologic therapies are discussed, including recombinant monoclonal antibodies directed against various interleukin pathways (such as IL-4, IL-13, TSLP, IL-31, and IL-12/23), on immunoglobulin E, molecules acting as T cells, B cells, etc...
August 31, 2017: Archivum Immunologiae et Therapiae Experimentalis
https://www.readbyqxmd.com/read/28819104/der-f-31-a-novel-allergen-from-dermatophagoides-farinae-activates-epithelial-cells-and-enhances-lung-resident-group-2-innate-lymphoid-cells
#8
Hui Wang, Jianli Lin, Lu Zeng, Chunyan Ouyang, Pixin Ran, Pingchang Yang, Zhigang Liu
Airway epithelial cell-derived thymic stromal lymphopoietin (TSLP) and IL-33 can enhance lung-resident group 2 innate lymphoid cells (ILC2s), and they play an important role in the development of allergic diseases. This study tests the hypothesis that Der f 31 (Dermatophagoides farinae-31), an allergen, modulates airway epithelial cell functions and increases the frequency of lung ILC2s. Our previous research identified cofilin (Der f 31) as a novel allergen. In this study, we found that recombinant Der f 31 (r-Der f 31) upregulated the expression of co-stimulatory molecules in DCs and promoted Th2-skewed polarization...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28689020/ferulic-acid-supresses-th2-immune-response-and-prevents-remodeling-in-ovalbumin-induced-pulmonary-allergy-associated-with-inhibition-of-epithelial-derived-cytokines
#9
Alessa Sin Singer Brugiolo, Ana Cláudia Carvalho Gouveia, Caio César de Souza Alves, Flávia Márcia de Castro E Silva, Érick Esteves de Oliveira, Ana Paula Ferreira
Asthma is characterized by intermittent airway obstruction and chronic inflammation, orchestrated primarily by Th2 cytokines. There is a strong rationale for developing new asthma therapies, since current treatment protocols present side effects and may not be effective in cases of difficult-to-control asthma. The purpose of this study was to evaluate the effect of ferulic acid, a phenolic acid commonly present in plants, in the ovalbumin-induced pulmonary allergy murine model. METHODS: BALB/c mice were sensitized and challenged with ovalbumin, and treatments were provided by gavage...
August 2017: Pulmonary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/28658558/the-atopic-march-current-insights-into-skin-barrier-dysfunction-and-epithelial-cell-derived-cytokines
#10
REVIEW
Hongwei Han, Florence Roan, Steven F Ziegler
Atopic dermatitis often precedes the development of other atopic diseases. The atopic march describes this temporal relationship in the natural history of atopic diseases. Although the pathophysiological mechanisms that underlie this relationship are poorly understood, epidemiological and genetic data have suggested that the skin might be an important route of sensitization to allergens. Animal models have begun to elucidate how skin barrier defects can lead to systemic allergen sensitization. Emerging data now suggest that epithelial cell-derived cytokines such as thymic stromal lymphopoietin (TSLP), IL-33, and IL-25 may drive the progression from atopic dermatitis to asthma and food allergy...
July 2017: Immunological Reviews
https://www.readbyqxmd.com/read/28656964/il-33-promotes-gastrointestianl-allergy-in-a-tslp-independent-manner
#11
H Han, F Roan, L K Johnston, D E Smith, P J Bryce, S F Ziegler
Atopic dermatitis (AD) often precedes asthma and food allergy, indicating that epicutaneous sensitization to allergens may be important in the induction of allergic responses at other barrier surfaces. Thymic stromal lymphopoietin (TSLP) and interleukin (IL)-33 are two cytokines that may drive type 2 responses in the skin; both are potential targets in the treatment of allergic diseases. We tested the functional role of IL-33 and the interplay between IL-33 and TSLP in mouse models of atopic march and gastrointestinal (GI) allergy...
June 28, 2017: Mucosal Immunology
https://www.readbyqxmd.com/read/28629743/association-study-of-childhood-food-allergy-with-genome-wide-association-studies-discovered-loci-of-atopic-dermatitis-and-eosinophilic-esophagitis
#12
Tomomitsu Hirota, Tsuguhisa Nakayama, Sakura Sato, Noriyuki Yanagida, Teruaki Matsui, Shiro Sugiura, Yuri Takaoka, Nobuyuki Hizawa, Shigeharu Fujieda, Akihiko Miyatake, Takashi Sasaki, Masayuki Amagai, Satoru Doi, Komei Ito, Motohiro Ebisawa, Mayumi Tamari
No abstract text is available yet for this article.
December 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28597545/cimifugin-suppresses-allergic-inflammation-by-reducing-epithelial-derived-initiative-key-factors-via-regulating-tight-junctions
#13
Xiaoyu Wang, Xiaoyan Jiang, Xi Yu, Hailiang Liu, Yu Tao, Guorong Jiang, Min Hong
Cimifugin is a bioactive component of Saposhnikovia divaricata, a Chinese herb for treating allergy. Our previous studies demonstrated that cimifugin inhibited allergic inflammation efficiently. This study aims to determine the mechanism of cimifugin on epithelial cells in allergic inflammation. Mice were sensitized and challenged with FITC to establish type 2 atopic dermatitis (AD) model. The initial stage of AD model, in which mice were just sensitized with FITC, was established in vivo and immortalized human epidermal (HaCaT) cells were utilized in vitro...
November 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/28552763/prevention-of-food-allergy-development-and-suppression-of-established-food-allergy-by-neutralization-of-thymic-stromal-lymphopoietin-il-25-and-il-33
#14
Marat V Khodoun, Sunil Tomar, Joel E Tocker, Yui Hsi Wang, Fred D Finkelman
BACKGROUND: Food allergy (FA) is an increasing problem that has no approved treatment. The pro-TH2 cytokines IL-25, IL-33, and thymic stromal lymphopoietin (TSLP) are associated with FA, and mAbs to these cytokines are reported to suppress murine FA development. OBJECTIVE: We sought to determine whether anti-pro-TH2 cytokine mAbs can block both FA maintenance and induction. METHODS: IgE-mediated FA was induced in BALB/c mice by oral gavage with medium-chain triglycerides (MCTs) plus egg white (EW) and was characterized by increased numbers of lamina propria TH2 cells, mast cells, and eosinophils, shock (hypothermia), mast cell degranulation (increased serum mouse mast cell protease 1), increased serum IgG1 anti-EW and IgE levels, and increased IL-4 and IL-13 secretion after MCT/EW challenge...
May 26, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28390860/basophil-derived-il-4-promotes-epicutaneous-antigen-sensitization-concomitant-with-the-development-of-food-allergy
#15
Maryam Hussain, Loïc Borcard, Kevin P Walsh, Maria Pena Rodriguez, Christoph Mueller, Brian S Kim, Masato Kubo, David Artis, Mario Noti
BACKGROUND: Exaggerated thymic stromal lymphopoietin (TSLP) production and infiltration of basophils are associated with the pathogenesis of atopic dermatitis (AD), a recognized risk factor for the development of food allergies. Although TSLP and basophils have been implicated in promotion of food-induced allergic disorders in response to epicutaneous sensitization, the mechanisms by which TSLP-elicited basophils guide the progression of allergic inflammation in the skin to distant mucosal sites, such as the gastrointestinal tract, are poorly understood...
April 6, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28368013/structure-and-antagonism-of-the-receptor-complex-mediated-by-human-tslp-in-allergy-and-asthma
#16
Kenneth Verstraete, Frank Peelman, Harald Braun, Juan Lopez, Dries Van Rompaey, Ann Dansercoer, Isabel Vandenberghe, Kris Pauwels, Jan Tavernier, Bart N Lambrecht, Hamida Hammad, Hans De Winter, Rudi Beyaert, Guy Lippens, Savvas N Savvides
The pro-inflammatory cytokine thymic stromal lymphopoietin (TSLP) is pivotal to the pathophysiology of widespread allergic diseases mediated by type 2 helper T cell (Th2) responses, including asthma and atopic dermatitis. The emergence of human TSLP as a clinical target against asthma calls for maximally harnessing its therapeutic potential via structural and mechanistic considerations. Here we employ an integrative experimental approach focusing on productive and antagonized TSLP complexes and free cytokine...
April 3, 2017: Nature Communications
https://www.readbyqxmd.com/read/28303765/the-significance-of-the-levels-of-il-4-il-31-and-tlsp-in-patients-with-asthma-and-or-rhinitis
#17
Ruonan Chai, Beixing Liu, Feifei Qi
AIM: To investigate the clinical significance of the levels of IL-4, IL-33 and thymic stromal lymphopoietin (TLSP) in patients with asthma and/or rhinitis, then do the simple verification in animals. METHODS: Levels of IL-4 IL-31, IL-33 and TLSP were detected by ELISA and real-time PCR in 64 asthma patients (sIgE[+]: 32 cases, sIgE[-]: 32 cases), 64 rhinitis patients (sIgE[+]: 32 cases, sIgE[-]: 32 cases), 64 asthma complicated with allergic rhinitis patients (sIgE[+]: 32 cases, sIgE[-]: 32 cases) and 32 healthy controls...
March 2017: Immunotherapy
https://www.readbyqxmd.com/read/28124203/the-role-of-allergy-testing-in-eosinophilic-esophagitis-an-update-of-the-evidence
#18
Hamish Philpott, Francis Thien
Allergy testing has been advocated for patients with eosinophilic esophagitis (EoE) as a means of defining food triggers and directing dietary therapy. Several recent and comprehensive studies have demonstrated the futility of skin prick (SPT), skin patch (APT) and serum food antigen specific IgE (SIgE) estimates in this context. Furthermore, if identification of food triggers is the endpoint (as opposed to the ability of an allergy test-directed diet merely to induce remission), previous positive studies have limitations...
March 2017: Current Treatment Options in Gastroenterology
https://www.readbyqxmd.com/read/27992078/basophils-and-mast-cells-are-crucial-for-reactions-due-to-epicutaneous-sensitization-to-ovalbumin
#19
Rie Yu, Ken Igawa, Yutaro Handa, Takichi Munetsugu, Takahiro Satoh, Hiroo Yokozeki
The prevalence of food allergies worldwide has increased recently. Epicutaneous sensitization to antigen could be a method to study food allergy. To clarify the mechanisms of food allergy, we established a mouse model of epicutaneous sensitization using ovalbumin (OVA). BALB/c mice were sensitized by three-time application of OVA to tape-stripped skin (1-week sensitization at 2-week intervals) and oral challenge of OVA undertaken. Rectal temperature was monitored. Blood and tissue (skin and jejunum) of challenged mice were taken...
December 19, 2016: Experimental Dermatology
https://www.readbyqxmd.com/read/27917896/astragaloside-iv-ameliorates-allergic-inflammation-by-inhibiting-key-initiating-factors-in-the-initial-stage-of-sensitization
#20
Kai-Fan Bao, Xi Yu, Xiao Wei, Li-Li Gui, Hai-Liang Liu, Xiao-Yu Wang, Yu Tao, Guo-Rong Jiang, Min Hong
To illuminate the anti-allergy mechanism of astragaloside IV (AS-IV), we assessed its effects in a murine model of allergic contact dermatitis (ACD). AS-IV administered in the sensitization phase, rather than in the elicitation phase, dramatically alleviated the symptoms of allergic inflammation. We hypothesized that AS-IV exerts its anti-allergy effects by regulating the production of key pro-allergic cytokines based on the fact that interleukin (IL)-33 and thymic stromal lymphopoietin (TSLP) levels increase significantly in the initial stage of the sensitization phase...
December 5, 2016: Scientific Reports
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