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https://www.readbyqxmd.com/read/29456654/establishment-of-different-experimental-asthma-models-in-mice
#1
Qian-Lin Yu, Zhangbo Chen
Asthma is a complex disease. The heterogeneity of airway inflammation during asthma indicates there are different mechanisms involved. In order to further study the mechanisms of asthma, different mouse models were established to mimic corresponding subtypes of asthma in clinic. Eosinophilic asthma was established by intraperitoneal injections of ovalbumin (OVA) on day 0 and day 7, followed by inhalation of aerosolized OVA on days 14-17. Neutrophilic asthma was established by transtracheal administration of a high dose of lipopolysaccharide (LPS; 10 µg) on days 15 and 17 in combination with OVA sensitization and challenge as described previously...
March 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29453280/elevated-expression-of-il-33-and-tslp-in-the-airways-of-human-asthmatics-in-vivo-a-potential-biomarker-of-severe-refractory-disease
#2
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
https://www.readbyqxmd.com/read/29432856/aqueous-extracts-from-uncaria-tomentosa-willd-ex-schult-dc-reduce-bronchial-hyperresponsiveness-and-inflammation-in-a-murine-model-of-asthma
#3
Bruna Cestari de Azevedo, Lucas Junqueira de Freitas Morel, Fábio Carmona, Thiago Mattar Cunha, Silvia Helena Taleb Contini, Piero Giuseppe Delprete, Fernando Silva Ramalho, Eduardo Crevelin, Bianca Waléria Bertoni, Suzelei de Castro França, Marcos de Carvalho Borges, Ana Maria Soares Pereira
ETHNOPHARMACOLOGICAL RELEVANCE: Uncaria tomentosa (Willd. Ex Schult) DC is used by indigenous tribes in the Amazonian region of Central and South America to treat inflammation, allergies and asthma. The therapeutic properties of U. tomentosa have been attributed to the presence of tetracyclic and pentacyclic oxindole alkaloids and to phenolic acids. AIMS OF THE STUDY: To characterize aqueous bark extracts (ABE) and aqueous leaf extracts (ALE) of U. tomentosa and to compare their anti-inflammatory effects...
February 9, 2018: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/29431692/development-of-asthma-in-inner-city-children-possible-roles-of-mait-cells-and-variation-in-the-home-environment
#4
Shilpi Chandra, Gerhard Wingender, Jason A Greenbaum, Archana Khurana, Amin M Gholami, Anusha-Preethi Ganesan, Michael Rosenbach, Katy Jaffee, James E Gern, Robert Wood, George O'Connor, Megan Sandel, Meyer Kattan, Leonard Bacharier, Alkis Togias, Anthony A Horner, Mitchell Kronenberg
Humans have populations of innate-like T lymphocytes with an invariant TCR α-chain that recognize nonpeptide Ags, including invariant NKT (iNKT) cells and mucosal-associated invariant T (MAIT) cells. iNKT cell involvement in human asthma is controversial, whereas there has been little analysis of MAIT cells. Using peripheral blood cells from 110 participants from the Urban Environment and Childhood Asthma (URECA) birth cohort study, these cells were analyzed for number and function. We determined whether iNKT cell or MAIT cell frequency at 1 y is correlated with the cytokine polarization of mainstream CD4+ T cells and/or the development of asthma by age 7 y...
February 5, 2018: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29399067/assessment-of-tumor-growth-factor-%C3%AE-1-neutralizing-antibody-in-the-treatment-of-allergic-rhinitis-and-asthma
#5
Yan Wei, Zhili Zhang, Feng Wang, Shuihong Zhou
To identify a novel and effective therapy for allergic rhinitis and asthma (ARA), the present study focused on treatment with tumor growth factor (TGF)-β1 neutralizing antibody. In the present study, four medications were administered to mice with ovalbumin-induced allergic inflammation. Allergic symptoms in the lungs and nasal mucosa were evaluated by detecting the secretion of cytokines from helper T cells (Th) in the peripheral blood, nasal lavage fluid and bronchoalveolar lavage fluid using ELISA. Defects in regulatory T (Treg) cells in peripheral blood mononuclear cells were also detected using flow cytometry...
January 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29393253/activation-of-bombesin-receptor-subtype-3-promotes-antigen-presenting-action-in-human-bronchial-epithelial-cells
#6
Huijun Liu, Lihua Peng, Chi Liu, Yurong Tan, Yang Xiang, Xiangping Qu, H Christian Weber, Minhui Dai, Xiaoqun Qin
BACKGROUND: Bombesin receptor subtype-3 (BRS-3) is a member of the bombesin-like peptide receptor family. Our previous studies demonstrated that activation of the human BRS-3 plays a protective role in oxidation-injured human bronchial epithelial cells (HBEC). The present study was designed to determine the role of BRS-3 activation in the antigen-presenting action of HBEC and the corresponding proliferation and differentiation of T cells. MATERIALS AND METHODS: In vivo, an asthma animal model was established and the expression and distribution of BRS-3 were analyzed by immunocytochemistry...
January 27, 2018: International Archives of Allergy and Immunology
https://www.readbyqxmd.com/read/29393209/therapeutic-role-for-tsp-2-antibody-in-a-murine-asthma-model
#7
Kai Li, En Ping Huang, Jin Su, Ping Zhu, Jun Lin, Shen Qiu Luo, Cui Lan Yang
BACKGROUND: Specific immunotherapy, including agonists for Toll-like receptor 2 (TLR2), have been shown to protect from allergies and to have a high immunomodulatory capacity. METHODS: A new antibody, TSP-2, reactive against an epitope of the extracellular domain of TLR2, was identified. The effect of the antibody on dendritic cells was assessed by immunohistochemistry, Western blot, and flow cytometric analysis. The effect of TSP-2 in a murine asthma model induced with ovalbumin (OVA) was assessed...
January 27, 2018: International Archives of Allergy and Immunology
https://www.readbyqxmd.com/read/29361942/il-1%C3%AE-mediates-lung-neutrophilia-and-il-33-expression-in-a-mouse-model-of-viral-induced-asthma-exacerbation
#8
Irma Mahmutovic Persson, Mandy Menzel, Sangeetha Ramu, Samuel Cerps, Hamid Akbarshahi, Lena Uller
BACKGROUND: Viral-induced asthma exacerbations, which exhibit both Th1-type neutrophilia and Th2-type inflammation, associate with secretion of Interleukin (IL)-1β. IL-1β induces neutrophilic inflammation. It may also increase Th2-type cytokine expression. We hypothesised that IL-1β is causally involved in both Th1 and Th2 features of asthma exacerbations. This hypothesis is tested in our mouse model of viral stimulus-induced asthma exacerbation. METHOD: Wild-type (WT) and IL-1β deficient (IL-1β-/-) mice received house dust mite (HDM) or saline intranasally during three weeks followed by intranasal dsRNA (PolyI:C molecule known for its rhinovirus infection mimic) for three consecutive days to provoke exacerbation...
January 24, 2018: Respiratory Research
https://www.readbyqxmd.com/read/29342458/glucocorticoids-modulate-th1-and-th2-responses-in-asthmatic-mouse-models-by-inhibition-of-notch1-signaling
#9
Chengping Hu, Zhifang Li, Juntao Feng, Yongjun Tang, Ling Qin, Xinyue Hu, Yan Zhang, Ruoxi He
BACKGROUND: Notch1 has been linked to the pathogenesis of asthma due to its contribution on Th1/Th2 imbalance. γ-Secretase inhibitor (GSI) acts as an effective blocker of Notch1 signaling. Glucocorticoids (GCs) are the most effective anti-inflammatory drugs for asthma. The present study investigated the involvement of the Notch1 pathway in the anti-inflammatory effect of GCs and its association with Th1/Th2 balance. METHODS: The asthma model was established in BALB/c mice by sensitization with ovalbumin (OVA)...
January 18, 2018: International Archives of Allergy and Immunology
https://www.readbyqxmd.com/read/29332324/effects-of-macrolide-and-corticosteroid-in-neutrophilic-asthma-mouse-model
#10
Tai Joon An, Chin Kook Rhee, Ji Hye Kim, Young Rong Lee, Jin Young Chon, Chan Kwon Park, Hyoung Kyu Yoon
BACKGROUND: Asthma is a disease of chronic airway inflammation with heterogeneous features. Neutrophilic asthma is corticosteroid-insensitive asthma related to absence or suppression of TH2 process and increased TH1 and/or TH17 process. Macrolides are immunomodulatory drug that reduce airway inflammation, but their role in asthma is not fully known. The purpose of this study was to evaluate the role of macrolides in neutrophilic asthma and compare their effects with those of corticosteroids...
January 2018: Tuberculosis and Respiratory Diseases
https://www.readbyqxmd.com/read/29319160/macrophage-plasticity-polarization-and-function-in-health-and-disease
#11
REVIEW
Abbas Shapouri Moghaddam, Saeed Mohammadian, Hossein Vazini, Mahdi Taghadosi, Seyed-Alireza Esmaeili, Fatemeh Mardani, Bita Seifi, Asadollah Mohammadi, Jalil Tavakol Afshari, Amirhossein Sahebkar
Macrophages are heterogeneous and their phenotype and functions are regulated by the surrounding micro-environment. Macrophages commonly exist in two distinct subsets: 1) Classically activated or M1 macrophages, which are pro-inflammatory and polarized by lipopolysaccharide (LPS) either alone or in association with Th1 cytokines such as IFN-γ, GM-CSF and produce pro-inflammatory cytokines such as interleukin-1β (IL-1β), IL-6, IL-12, IL-23 and TNF-α, and 2) Alternatively activated or M2 macrophages, which are anti-inflammatory and immunoregulatory and polarized by Th2 cytokines such as IL-4 and IL-13 and produce anti-inflammatory cytokines such as IL-10 and TGF-β...
January 10, 2018: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29306980/sex-in-respiratory-and-skin-allergies
#12
REVIEW
Erminia Ridolo, Cristoforo Incorvaia, Irene Martignago, Marco Caminati, Giorgio Walter Canonica, Gianenrico Senna
A bulk of literature demonstrated that respiratory allergy, and especially asthma, is prevalent in males during childhood, while it becomes more frequent in females from adolescence, i.e., after menarche, to adulthood. The mechanisms underlying the difference between females and males are the effects on the immune response of female hormones and in particular the modulation of inflammatory response by estrogens, as well as the result of the activity of various cells, such as dendritic cells, innate lymphoid cells, Th1, Th2, T regulatory (Treg) and B regulatory (Bregs) cells, and a number of proteins and cytokines, which include interleukin (IL)-4, IL-5, IL-10, and IL-13...
January 6, 2018: Clinical Reviews in Allergy & Immunology
https://www.readbyqxmd.com/read/29302700/immunization-with-an-adenovirus-vectored-tb-vaccine-containing-ag85a-mtb32-effectively-alleviates-allergic-asthma
#13
Yiling Zhang, Ying Feng, Liang Li, Xianmiao Ye, Jinlin Wang, Qian Wang, Pingchao Li, Na Li, Xuehua Zheng, Xiang Gao, Chufang Li, Feng Li, Baoqing Sun, Kefang Lai, Zhong Su, Nanshan Zhong, Ling Chen, Liqiang Feng
Current treatments for allergic asthma primarily ameliorate symptoms rather than inhibit disease progression. Regulating the excessive T helper type 2 (Th2) responses may prevent asthma exacerbation. In this study, we investigated the protective effects of Ad5-gsgAM, an adenovirus vector carrying two mycobacterial antigens Ag85A and Mtb32, against allergic asthma. Using an ovalbumin (OVA)-induced asthmatic mouse model, we found that Ad5-gsgAM elicited much more Th1-biased CD4+T and CD8+T cells than bacillus Calmette-Guérin (BCG)...
January 4, 2018: Journal of Molecular Medicine: Official Organ of the "Gesellschaft Deutscher Naturforscher und Ärzte"
https://www.readbyqxmd.com/read/29279262/inkt-cells-are-increased-in-children-with-severe-therapy-resistant-asthma
#14
L Antunes, A P Duarte de Souza, P D de Araújo, L A Pinto, M H Jones, R T Stein, P M Pitrez
BACKGROUND: Invariant natural killer T (iNKT) cells play complex functions in the immune system, releasing both Th1 and Th2 cytokines. The role of iNKT cells in human asthma is still controversial and never described in severe therapy-resistant asthma in children. The objective of this work was to analyse iNKT frequency in peripheral blood of children with severe therapy-resistant asthma (STRA), compared to children with milder asthma and healthy controls. METHODS: Children with asthma (n=136) (non-severe and STRA) from a referral centre and healthy controls (n=40) were recruited...
December 23, 2017: Allergologia et Immunopathologia
https://www.readbyqxmd.com/read/29247993/interleukin-33-il-33-a-nuclear-cytokine-from-the-il-1-family
#15
REVIEW
Corinne Cayrol, Jean-Philippe Girard
Interleukin-33 (IL-33) is a tissue-derived nuclear cytokine from the IL-1 family abundantly expressed in endothelial cells, epithelial cells and fibroblast-like cells, both during homeostasis and inflammation. It functions as an alarm signal (alarmin) released upon cell injury or tissue damage to alert immune cells expressing the ST2 receptor (IL-1RL1). The major targets of IL-33 in vivo are tissue-resident immune cells such as mast cells, group 2 innate lymphoid cells (ILC2s) and regulatory T cells (Tregs)...
January 2018: Immunological Reviews
https://www.readbyqxmd.com/read/29221580/mechanisms-of-allergen-immunotherapy-for-inhaled-allergens-and-predictive-biomarkers
#16
REVIEW
Mohamed H Shamji, Stephen R Durham
Allergen immunotherapy is effective in patients with IgE-dependent allergic rhinitis and asthma. When immunotherapy is given continuously for 3 years, there is persistent clinical benefit for several years after its discontinuation. This disease-modifying effect is both antigen-specific and antigen-driven. Clinical improvement is accompanied by decreases in numbers of effector cells in target organs, including mast cells, basophils, eosinophils, and type 2 innate lymphoid cells. Immunotherapy results in the production of blocking IgG/IgG4 antibodies that can inhibit IgE-dependent activation mediated through both high-affinity IgE receptors (FcεRI) on mast cells and basophils and low-affinity IgE receptors (FcεRII) on B cells...
December 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29210124/a-novel-herbal-composition-containing-extracts-of-boswellia-serrata-gum-resin-and-aegle-marmelos-fruit-alleviates-symptoms-of-asthma-in-a-placebo-controlled-double-blind-clinical-study
#17
Pothina Yugandhar, Konda Manikyeswara Rao, Krishanu Sengupta
LI13109F is a novel herbal composition containing the extracts of Boswellia serrata gum resin and Aegle marmelos fruit. This composition dampens leukotriene dependent inflammatory reactions via inhibiting 5-lipoxygenase pathway. In a Sephadex LH-20 induced airway inflammation model of Sprague Dawley rats, LI13109F significantly reduced infiltrated granulocyte population in the bronco-alveolar lavage fluid and normalized Th1/Th2 cytokine balance. Further, a 56-day placebo-controlled and randomized double blind study (Clinical Trial Registration No...
December 6, 2017: Phytotherapy Research: PTR
https://www.readbyqxmd.com/read/29183288/arginase-1-deletion-in-myeloid-cells-affects-the-inflammatory-response-in-allergic-asthma-but-not-lung-mechanics-in-female-mice
#18
Roy H E Cloots, Selvakumari Sankaranarayanan, Matthew E Poynter, Els Terwindt, Paul van Dijk, Wouter H Lamers, S Eleonore Köhler
BACKGROUND: (Over-)expression of arginase may limit local availability of arginine for nitric oxide synthesis. We investigated the significance of arginase1 (ARG1) for the development of airway hyperresponsiveness (AHR) and lung inflammation in female mice with ovalbumin (OVA)-induced allergic asthma. METHODS: Arg1 was ablated in the lung by crossing Arg1 fl/fl and Tie2Cre tg/- mice. OVA sensitization and challenge were conducted, and AHR to methacholine was determined using the Flexivent system...
November 28, 2017: BMC Pulmonary Medicine
https://www.readbyqxmd.com/read/29162668/huai-qi-huang-corrects-the-balance-of-th1-th2-and-treg-th17-in-an-ovalbumin-induced-asthma-mouse-model
#19
Peng Liang, Shao Peng, Man Zhang, Yingying Ma, Xinggang Zhen, Huijuan Li
This study is designed to determine whether Huai Qi Huang has immuno-regulatory effects on the Th1/Th2 and Treg/Th17 balance in ovalbumin (OVA)-induced asthma model mice. Asthma model mice were constructed by OVA treatment and Huai Qi Huang was administrated. The amount of migrated inflammatory cells in the bronchoalveolar lavage fluid (BALF) from the OVA mice was counted. The total immunoglobulin E (IgE) in the sera was detected by the IgE ELISA kit. Cell suspensions from the lung were stained with antibodies specific for CD4 and the master transcription factors for Th1 (T-bet), Th2 (Gata-3), Th17 (RORγt), and Treg (Foxp3)...
November 21, 2017: Bioscience Reports
https://www.readbyqxmd.com/read/29161804/importance-of-biological-ultrafine-particles-in-indoor-dust-as-a-pathogenesis-of-chronic-inflammatory-lung-diseases
#20
Young-Koo Jee, Jinho Yang, Yoon-Keun Kim, You-Young Kim, Tae Soo Kang
The role of infectious agents in the etiology of inflammatory diseases once believed to be non-infectious is increasingly being recognized. Many bacterial components in the indoor dust can evoke inflammatory lung diseases. Bacteria secrete nanometer-sized vesicles into the extracellular milieu, so-called extracellular vesicles (EVs). which are pathophysiologically related to inflammatory diseases. Microbiota compositions in the indoor dust revealed the presence of both gram-negative and gram-positive bacteria...
November 17, 2017: Environmental Health and Toxicology
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