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Airway mucus production and secretion

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https://www.readbyqxmd.com/read/29778504/solitary-chemosensory-cells-are-a-primary-epithelial-source-of-interleukin-25-in-chronic-rhinosinusitis-with-nasal-polyps
#1
Michael A Kohanski, Alan D Workman, Neil N Patel, Li-Yin Hung, Julie P Shtraks, Bei Chen, Mariel Blasetti, Laurel Doghramji, David W Kennedy, Nithin D Adappa, James N Palmer, De'Broski R Herbert, Noam A Cohen
BACKGROUND: IL-25 can function as an early signal for the respiratory Type 2 response characteristic of allergic asthma and chronic rhinosinusitis with nasal polyps (CRSwNP). In the mouse gut, tuft cells are the epithelial source of IL-25. However, the source of human airway epithelial IL-25 has remained elusive. OBJECTIVE: In this study, we sought to determine if the solitary chemosensory cell (SCC) is the predominant source of IL-25 in the sinonasal epithelium...
May 17, 2018: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29747753/dehydrocostus-lactone-a-sesquiterpene-from-saussurea-lappa-clarke-suppresses-allergic-airway-inflammation-by-binding-to-dimerized-translationally-controlled-tumor-protein
#2
Haejun Pyun, Unwoo Kang, Eun Kyoung Seo, Kyunglim Lee
BACKGROUND: We previously reported that the biologically active form of histamine releasing factor (HRF) is dimerized translationally controlled tumor protein (dTCTP) which is involved in a number of allergic diseases. HYPOTHESIS/PURPOSE: Hoping that agents that modulate dTCTP may provide new therapeutic targets to allergic inflammatory diseases, we screened a library of natural products for substances that inhibit dTCTP. One such inhibitor we found was dehydrocostus lactone (DCL), a natural sesquiterpene present in rhizome of Saussurea lappa Clarke, the subject of this study...
April 1, 2018: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
https://www.readbyqxmd.com/read/29698781/in-vivo-and-in-vitro-investigation-of-anti-inflammatory-and-mucus-regulatory-activities-of-a-fixed-combination-of-thyme-and-primula-extracts
#3
Jan Seibel, Kirill Kryshen, Judit E Pongrácz, Martin D Lehner
Hypersecretion of viscous mucus is one of the hallmark symptoms of acute and chronic bronchitis and typically develops secondary to an inflammation of the airway epithelium. Bronchipret® TP film-coated tablets (BRO), an herbal medicinal product containing a fixed combination of thyme herb and primula root extracts, has been successfully used clinically for the treatment of acute bronchitis for more than two decades. However, the underlying pharmacological mechanisms of action have not been fully understood so far...
April 23, 2018: Pulmonary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/29680833/lps-exposure-in-early-life-protects-against-mucus-hypersecretion-in-ovalbumin-induced-asthma-by-down-regulation-of-the-il-13-and-jak-stat6-pathways
#4
Fengxia Ding, Bo Liu, Wenjing Zou, Daiyin Tian, Qubei Li, Jihong Dai, Zhengxiu Luo, Zhou Fu
BACKGROUND/AIMS: Previous studies have shown that lipopolysaccharide (LPS) exposure may have a protective effect on asthma by reducing airway hyper-responsiveness, airway inflammation and serum IgE levels. However, there are few studies investigating the effect of LPS on mucous secretion in asthma. In this study, we evaluate the relationship between LPS pre-treatment in infant mice and airway mucus hypersecretion in an OVA (ovalbumin)-induced asthma model, and further explore the mechanisms behind this effect...
2018: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29621753/necroptosis-contributes-to-urban-particulate-matter-induced-airway-epithelial-injury
#5
Feng Xu, Man Luo, Lulu He, Yuan Cao, Wen Li, Songmin Ying, Zhihua Chen, Huahao Shen
BACKGROUND/AIMS: Necroptosis, a form of programmed necrosis, is involved in the pathologic process of several kinds of pulmonary diseases. However, the role of necroptosis in particulate matter (PM)-induced pulmonary injury remains unclear. The objective of this study is to investigate the involvement of necroptosis in the pathogenesis of PM-induced toxic effects in pulmonary inflammation and mucus hyperproduction, both in vitro and in vivo. METHODS: PM was administered into human bronchial epithelial (HBE) cells or mouse airways, and the inflammatory response and mucus production were assessed...
March 29, 2018: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29567418/plasticizer-di-2-ethylhexyl-phthalate-dehp-enhances-cockroach-allergen-extract-driven-airway-inflammation-by-enhancing-pulmonary-th2-as-well-as-th17-immune-responses-in-mice
#6
Ali S Alfardan, Ahmed Nadeem, Sheikh F Ahmad, Naif O Al-Harbi, Mohammad M Al-Harbi, Shakir D AlSharari
In recent decades, there has been a gradual increase in the prevalence of asthma. Various factors including environmental pollutants have contributed to this phenomenon. Plasticizer, di(2-ethylhexyl)phthalate (DEHP) is one of the commonest environmental pollutants due to its association with plastic products. DEHP gets released from plastic products easily leading to respiratory exposure in humans. As a consequence, DEHP is associated with allergic asthma in humans and animals. DEHP is reported to act as an adjuvant in ovalbumin-induced mouse models of asthma at high doses...
March 19, 2018: Environmental Research
https://www.readbyqxmd.com/read/29565501/the-relationship-between-muc5ac-high-secretion-and-munc18b-upregulation-in-obese-asthma
#7
W-M Hao, S-F Sun, H-P Tang
OBJECTIVE: Mucus production and hypersecretion are important pathophysiological features of asthma. Airway mucus secretion is more serious in obese asthma. Therefore, it is of great significance to elucidate the mechanism of asthma airway mucus high secretion in improving the control of asthma and the prognosis of obese asthmatic patients. MATERIALS AND METHODS: Obese asthmatic mice model was established to test the airway resistance and mucin secretion by hematoxylin-eosin (HE) staining...
March 2018: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/29540228/early-life-exposure-to-three-size-fractionated-ultrafine-and-fine-atmospheric-particulates-in-beijing-exacerbates-asthma-development-in-mature-mice
#8
Mei Mei, Haojun Song, Lina Chen, Bin Hu, Ru Bai, Diandou Xu, Ying Liu, Yuliang Zhao, Chunying Chen
BACKGROUND: Epidemiological studies have suggested that elevated levels of air pollution contribute to an increased incidence or severity of asthma. Although late-onset adult asthma seems to be more attributable to environmental risk factors, limited data is available on the impact of early-life exposure to size-fractionated ambient particulate matter (PM) on asthma in adults. We aimed to determine the effect on the development and exacerbation of asthma in the adult after the mice were exposed as juveniles to three size-fractionated ambient particulates collected from Beijing...
March 14, 2018: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/29525705/ceo-2-nanoparticles-attenuate-airway-mucus-secretion-induced-by-tio-2-nanoparticles
#9
Shih-Ming Tsai, Edith Duran-Robles, Tyler Goshia, Maria Mesina, Carlos Garcia, Julia Young, Angelo Sibal, Meng-Hsuen Chiu, Wei-Chun Chin
Nanotoxicity studies associated with various nanoparticles (NPs) have attracted intense research interest due to the broader applications of nanoparticles in our daily lives. The exposure of nanoparticles can lead to hypersecretion and accumulation of airway mucus which are closely associated with many respiratory diseases. Titanium dioxide (TiO2 ), one of the PM10 components, is a major NP that is widely utilized in many commercial products. Our previous study established the connection between induced airway mucus secretion and TiO2 NPs...
August 1, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29427987/advances-and-evolving-concepts-in-allergic-asthma
#10
Hui-Ying Tung, Evan Li, Cameron Landers, An Nguyen, Farrah Kheradmand, J Morgan Knight, David B Corry
Allergic asthma is a heterogeneous disorder that defies a unanimously acceptable definition, but is generally recognized through its highly characteristic clinical expression of dyspnea and cough accompanied by clinical data that document reversible or exaggerated airway constriction and obstruction. The generally rising prevalence of asthma in highly industrialized societies despite significant therapeutic advances suggests that the fundamental cause(s) of asthma remain poorly understood. Detailed analyses of both the indoor (built) and outdoor environments continue to support the concept that not only inhaled particulates, especially carbon-based particulate pollution, pollens, and fungal elements, but also many noxious gases and chemicals, especially biologically derived byproducts such as proteinases, are essential to asthma pathogenesis...
February 2018: Seminars in Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/29417945/emodin-alleviates-alternatively-activated-macrophage-and-asthmatic-airway-inflammation-in-a-murine-asthma-model
#11
Yun-Duan Song, Xiao-Zong Li, Ya-Xian Wu, Yao Shen, Fang-Fang Liu, Pei-Pei Gao, Lei Sun, Feng Qian
Alternatively activated macrophages (AAMs) are not only associated with asthma but also lead to asthmatic airway inflammation and remodeling. Inhibition of AAMs is an alternative therapeutic strategy for treating asthma. In this study we investigated whether emodin (1,3,8-trihydroxy-6-methylanthraquinone), isolated from the rhizome of Rheum palmatum, alleviated asthmatic airway inflammation and reduced AAM polarization in a murine asthma model. Mice were sensitized with a triple allergen mix containing dust mite, ragweed and aspergillus (DRA)...
February 8, 2018: Acta Pharmacologica Sinica
https://www.readbyqxmd.com/read/29343807/house-dust-mite-induced-allergic-airway-disease-is-attenuated-in-cd11ccreil-4r%C3%AE-l%C3%A2-x-mice
#12
Natalie Eva Nieuwenhuizen, Frank Kirstein, Jennifer Claire Hoving, Frank Brombacher
The precise mechanisms leading to development of T helper type (Th)2-driven allergic responses are unknown. We aimed to determine how IL-4 receptor alpha (IL-4Rα) signaling on CD11c+ cells influences allergen-induced Th2 responses in mice. CD11ccreIL-4Rα-/l°x mice, deficient in IL-4Rα on dendritic cells and alveolar macrophages, were compared to IL-4Rα-/l°x littermate controls in models of allergic airway disease induced by OVA/alum, OVA alone or house dust mite. Cytokine responses, eosinophil and neutrophil infiltration into the lungs, airway hyperreactivity and mucus hypersecretion were evaluated after allergen challenge...
January 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29203321/lipopolysaccharide-impairs-mucin-secretion-and-stimulated-mucosal-immune-stress-response-in-respiratory-tract-of-neonatal-chicks
#13
Xiaoxiao Fan, Hongchao Jiao, Jingpeng Zhao, Xiaojuan Wang, Hai Lin
The chicken immune system is immature at the time of hatching. The development of the respiratory immune system after hatching is vital to young chicks. The aim of this study was to investigate the effect of LPS on respiratory mucin and IgA production in chicks. In this study, we selected 7days old AA broilers of similar weigh randomly; LPS atomized at 1mg/kg body weigh dose in the confined space of 1 cubic meter. The chickens exposed for 2h. Then collect samples after 4h and 8h respectively. Compared to control, LPS inhibited mucus production in BALF, caused a rising trend of the concentration of IgA in serum and BALF, and increased the protein expression of IgA in lung tissue...
January 2018: Comparative Biochemistry and Physiology. Toxicology & Pharmacology: CBP
https://www.readbyqxmd.com/read/29186064/airway-mucus-and-asthma-the-role-of-muc5ac-and-muc5b
#14
REVIEW
Luke R Bonser, David J Erle
Asthma is characterized by mucus abnormalities. Airway epithelial hyperplasia and metaplasia result in changes in stored and secreted mucin and the production of a pathologic mucus gel. Mucus transport is impaired, culminating in mucus plugging and airway obstruction-a major cause of morbidity in asthma. The polymeric mucins MUC5AC and MUC5B are integral components of airway mucus. MUC5AC and MUC5B gene expression is altered in asthma, and recent work sheds light on their contribution to asthma pathogenesis...
November 29, 2017: Journal of Clinical Medicine
https://www.readbyqxmd.com/read/29183867/the-epidermal-growth-factor-receptor-inhibitor-ag1478-inhibits-eosinophilic-inflammation-in-upper-airways
#15
Shino Shimizu, Kumiko Takezawa-Yasuoka, Takao Ogawa, Ichiro Tojima, Hideaki Kouzaki, Takeshi Shimizu
Mucus hypersecretion and eosinophil infiltration are important characteristics of eosinophilic inflammation in upper airways, such as allergic rhinitis and chronic rhinosinusitis with nasal polyp. EGFR transactivation induces mucus and inflammatory cytokine secretion from airway epithelial cells. However, the roles of EGFR in eosinophilic inflammation in upper airways are still unknown. The purpose of the study is to elucidate the effects of the EGFR inhibitor AG1478 on eosinophilic airway inflammation. AG1478 significantly inhibited thrombin-induced GM-CSF secretion from nasal epithelial cells and thrombin-induced secretion of eotaxin-1 and RANTES from nasal fibroblasts...
March 2018: Clinical Immunology: the Official Journal of the Clinical Immunology Society
https://www.readbyqxmd.com/read/29158154/tiotropium-inhibits-mucin-production-stimulated-by-neutrophil-elastase-but-not-by-il-13
#16
Kosaku Komiya, Shuichi Kawano, Isao Suzaki, Tomohiro Akaba, Jun-Ichi Kadota, Bruce K Rubin
Tiotropium, a muscarinic antagonist, is approved for the treatment of chronic obstructive pulmonary disease and poorly controlled asthma. Because mucus hypersecretion is characteristic of both of these diseases, and muscarinic agonists stimulate mucus secretion, we hypothesized that tiotropium would attenuate airway MUC5AC expression. We grew normal human bronchial epithelial (NHBE) cells to a goblet cell phenotype with 1 or 5 ng/mL of IL-13 and exposed these cells to 10 nM tiotropium or excipient for the full 14 days...
February 2018: Pulmonary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/29129801/activating-prostaglandin-e2-receptor-subtype-ep4-increases-secreted-mucin-from-airway-goblet-cells
#17
Tomohiro Akaba, Kosaku Komiya, Isao Suzaki, Yuji Kozaki, Jun Tamaoki, Bruce K Rubin
Prostaglandin E2 (PGE2) is a ligand of the E-type prostanoid receptors, EP1-4. PGE2 secretion is increased in the airways of patients with asthma by secretory phospholipases A2 , which also increases MUC5AC mucin in goblet cells. We hypothesized that PGE2 would also increase MUC5AC mRNA and secreted protein through specific EP receptor activation. We sought to assess the effect of specific EP receptor activation on MUC5AC secretion from ciliated-enriched cells or goblet-enriched cells induced by IL-13. We develop an enriched goblet cell epithelium by growing normal human bronchial epithelial cells at air liquid interface for 14 days in the presence of IL-13...
February 2018: Pulmonary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/29099608/mucin-production-and-hydration-responses-to-mucopurulent-materials-in-normal-versus-cystic-fibrosis-airway-epithelia
#18
Lubna H Abdullah, Raymond Coakley, Megan J Webster, Yunxiang Zhu, Robert Tarran, Giorgia Radicioni, Mehmet Kesimer, Richard C Boucher, C William Davis, Carla M P Ribeiro
RATIONALE: Cystic fibrosis (CF) airways disease produces a mucoobstructive lung phenotype characterized by airways mucus plugging, epithelial mucous cell metaplasia/hyperplasia, chronic infection, and inflammation. Simultaneous biochemical and functional in vivo studies of mucin synthesis and secretion from CF airways are not available. In vitro translational models may quantitate differential CF versus normal mucin and fluid secretory responses to infectious/inflammatory stimuli. OBJECTIVES: We tested the hypothesis that CF airways exhibit defective epithelial fluid, but not mucin, secretory responses to bacterial/inflammatory host products...
February 15, 2018: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/29091392/thiol-benzo-triazolo-quinazolinone-inhibits-alg44-binding-to-c-di-gmp-and-reduces-alginate-production-by-pseudomonas-aeruginosa
#19
Eric Zhou, Anna B Seminara, Soo-Kyoung Kim, Cherisse L Hall, Yan Wang, Vincent T Lee
Pseudomonas aeruginosa is an opportunistic pathogen that affects a large proportion of cystic fibrosis (CF) patients. CF patients have dehydrated mucus within the airways that leads to the inability of the mucociliary escalator to expel inhaled microbes. Once inhaled, P. aeruginosa can persist in the lungs of the CF patients for the remainder of their lives. During this chronic infection, a phenomenon called mucoid conversion can occur in which P. aeruginosa can mutate and inactivate their mucA gene. As a consequence, transcription of the alg operon is highly expressed, leading to the copious secretion of the alginate exopolysaccharide, which is associated with decreased lung function and increased CF patient morbidity and mortality...
December 15, 2017: ACS Chemical Biology
https://www.readbyqxmd.com/read/28942146/leptin-positively-regulates-muc5ac-production-and-secretion-induced-by-interleukin-13-in-human-bronchial-epithelial-cells
#20
Wanming Hao, Jing Wang, Yu Zhang, Yunying Wang, Lixin Sun, Wei Han
Mucus hypersecretion and plugging of lower respiratory tract airways due to mucus plugs have long been recognized as the leading cause of the morbidity and mortality in asthma. MUC5AC protein is a major component of airway mucus. Here, we showed that interleukin (IL)-13 induced MUC5AC production and secretion, and leptin expression in the human bronchial epithelial cell line-16 (HBE16) cells in a concentration-dependent manner. Leptin knockdown suppressed MUC5AC production and secretion induced by IL-13. We further investigated the molecular mechanism by which leptin functioned, and found that leptin regulated IL-13-induced MUC5AC production and secretion via the JAK2-STAT3 pathway...
November 18, 2017: Biochemical and Biophysical Research Communications
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