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https://www.readbyqxmd.com/read/28087907/-effect-of-methyleugenol-on-expression-of-muc5ac-in-nasal-mucosa-of-rats-with-allergic-rhinitis
#1
Nannan Meng, Yun Hou, Yan Gui, Kehu Xi, Youhu Wang, Jing Yang, Hong Chen, Xiaobing Zhang
Objective: To investigate the effect of methyleugenol on expression of MUC5AC in nasal mucosa of rats with allergic rhinitis (AR). Methods: Seventy-two Wistar rats were randomly divided into 6 groups:normal control group, AR group, loratadine group, low-dose methyleugenol group, middle-dose methyleugenol group and high-dose methyleugenol group with 12 rats in each group. AR was induced by intraperitoneal injection of ovalbumin in latter 5 groups. 10 mg loratadine q.d was given to rats in loratadine group by gavage; and 10 mg/kg, 20 mg/kg and 40 mg/kg methyleugenol were given by gavege q...
May 25, 2016: Zhejiang da Xue Xue Bao. Yi Xue Ban, Journal of Zhejiang University. Medical Sciences
https://www.readbyqxmd.com/read/28027286/the-relationship-of-the-middle-ear-effusion-microbiome-to-secretory-mucin-production-in-pediatric-patients-with-chronic-otitis-media
#2
Anna Krueger, Stéphanie Val, Marcos Pérez-Losada, Karuna Panchapakesan, Joe Devaney, Vanessa Duah, Christine DeMasson, Marian Poley, Mary Rose, Diego Preciado
BACKGROUND: Acute otitis media (AOM), an infection of the middle ear, can become chronic (COM) following multiple episodes. Microbial influence on COM remains unclear. It's been reported that mucin glycoproteins are required for middle ear immune defense against pathogens. We aim to characterize the middle ear effusion (MEE) microbiome using high-throughput sequencing and assess potential associations in microbiome diversity with the presence of the secretory mucins MUC5B and MUC5AC. We hypothesize that MEEs containing MUC5B will exhibit a microbiome largely devoid of typical AOM bacteria...
December 23, 2016: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/28024734/lyn-kinase-represses-mucus-hypersecretion-by-regulating-il-13-induced-endoplasmic-reticulum-stress-in-asthma
#3
Xing Wang, Xiaoqiong Yang, Yin Li, Xiaoyun Wang, Yun Zhang, Xi Dai, Bin Niu, Juan Wu, Xiefang Yuan, Anjie Xiong, Zhigang Liu, Nanshan Zhong, Min Wu, Guoping Li
In asthma, mucus hypersecretion is thought to be a prominent pathological feature associated with widespread mucus plugging. However, the current treatments for mucus hypersecretion are often ineffective or temporary. The potential therapeutic targets of mucus hypersecretion in asthma remain unknown. Here, we show that Lyn is a central effector of endoplasmic reticulum stress (ER stress) and mucous hypersecretion in asthma. In Lyn-transgenic mice (Lyn-TG) and wild-type (WT) C57BL/6J mice exposed to ovalbumin (OVA), Lyn overexpression attenuates mucus hypersecretion and ER stress...
December 21, 2016: EBioMedicine
https://www.readbyqxmd.com/read/28011616/targeted-epigenetic-editing-of-spdef-reduces-mucus-production-in-lung-epithelial-cells
#4
Juan Song, David Cano Rodriguez, Melanie Winkle, Rutger A F Gjaltema, Désirée Goubert, Tomasz P Jurkowski, Irene H Heijink, Marianne G Rots, Machteld N Hylkema
Airway mucus hypersecretion contributes to the morbidity and mortality in patients with chronic inflammatory lung diseases. Reducing mucus production is crucial for improving patients' quality of life. The transcription factor SAM-pointed domain-containing Ets-like factor (SPDEF) plays a critical role in the regulation of mucus production, and therefore represents a potential therapeutic target. This study aims to reduce lung epithelial mucus production by targeted silencing SPDEF using the novel strategy epigenetic editing...
December 23, 2016: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/28009531/effect-of-retinol-palmitate-on-corneal-and-conjunctival-mucin-gene-expression-in-a-rat-dry-eye-model-after-injury
#5
Nobuhito Tabuchi, Hiroshi Toshida, Daisuke Koike, Akito Odaka, Chikako Suto, Toshihiko Ohta, Akira Murakami
PURPOSE: We examined the wound-healing effect of retinol palmitate (VApal) on mucin gene and protein expressions in a rat dry eye model based on lacrimal gland (LG) resection after injury. METHODS: The rat dry eye model was prepared by surgical resection of the main LG in male Long-Evans rats. After alkaline injury of the central part of the lower palpebral conjunctiva bilaterally, VApal eye drops at 1,500 IU/mL in one eye and a vehicle in the fellow eye were both administered 6 times a day for 7 days...
January 2017: Journal of Ocular Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/28002540/gallbladder-carcinoma-a-rare-cause-of-pyloric-duodenal-stenosis
#6
Zizi Niculescu, Victoria Ulmeanu, Mihaela Maria Ghinea, Liliana Mocanu, Costin Niculescu, Mircea Grigorian
Pyloric duodenal stenosis is usually caused by pyloric, juxtapyloric or duodenal ulcer, or by postbulbar ulcer. Gallbladder cancer (GBC), duodenal diverticula, annular pancreas and superior mesenteric artery syndrome (Wilkie's syndrome) are rare causes of pyloric duodenal stenosis. The case of a 66-year-old female patient is presented. The patient was admitted to hospital presenting anorexia, repeated alimentary vomiting, epigastric pain, and weight loss. Objective clinical examination upon admission: clapotage à jeun is present, triggered by tapping the epigastric region...
2016: Romanian Journal of Morphology and Embryology, Revue Roumaine de Morphologie et Embryologie
https://www.readbyqxmd.com/read/27992432/a-gastric-glycoform-of-muc5ac-is-a-biomarker-of-mucinous-cysts-of-the-pancreas
#7
Jessica Sinha, Zheng Cao, Jianliang Dai, Huiyuan Tang, Katie Partyka, Galen Hostetter, Diane M Simeone, Ziding Feng, Peter J Allen, Randall E Brand, Brian B Haab
Molecular indicators to specify the risk posed by a pancreatic cyst would benefit patients. Previously we showed that most cancer-precursor cysts, termed mucinous cysts, produce abnormal glycoforms of the proteins MUC5AC and endorepellin. Here we sought to validate the glycoforms as a biomarker of mucinous cysts and to specify the oligosaccharide linkages that characterize MUC5AC. We hypothesized that mucinous cysts secrete MUC5AC displaying terminal N-acetylglucosamine (GlcNAc) in either alpha or beta linkage...
2016: PloS One
https://www.readbyqxmd.com/read/27984236/duodenal-neoplasms-of-gastric-phenotype-an-immunohistochemical-and-genetic-study-with-a-practical-approach-to-the-classification
#8
Risa Hida, Hidetaka Yamamoto, Minako Hirahashi, Reiko Kumagai, Kenichi Nishiyama, Toshihiro Gi, Motohiro Esaki, Takanari Kitazono, Yoshinao Oda
Duodenal neoplasm of gastric phenotype (DNGP) is very rare, and details of its histopathologic, genetic, and biological features are still unclear. Frequent gene mutations in GNAS, KRAS, and APC have been reported in pyloric gland adenomas and fundic gland-type neoplasms (initially reported as low-grade adenocarcinomas) of the stomach. Here we retrospectively analyzed 16 cases of extra-ampullary DNGP (benign to malignant), and we examined the mucin immunoprofile and oncogene mutations (GNAS, KRAS, APC, BRAF, and CTNNB1)...
December 14, 2016: American Journal of Surgical Pathology
https://www.readbyqxmd.com/read/27979861/bmi-1-extends-proliferative-potential-of-human-bronchial-epithelial-cells-whilst-retaining-their-mucociliary-differentiation-capacity
#9
Mustafa Mohamed Munye, Amelia Shoemark, Robert A Hirst, Juliette M Delhove, Tyson V Sharp, Tristan R McKay, Chistopher O'Callaghan, Deborah L Baines, Steven J Howe, Stephen L Hart
Air-liquid interface (ALI) culture of primary airway epithelial cells enables mucociliary differentiation providing an in vitro model of the human airway but their proliferative potential is limited. To extend proliferation, these cells were previously transduced with viral oncogenes or mouse Bmi-1 + hTERT but the resultant cell lines did not undergo mucociliary differentiation. We hypothesised that use of human BMI-1 alone would increase the proliferative potential of bronchial epithelial cells while retaining their mucociliary differentiation potential...
December 15, 2016: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/27916735/laryngeal-mucus-hypersecretion-is-exacerbated-after-smoking-cessation-and-ameliorated-by-glucocorticoid-administration
#10
Rumi Ueha, Satoshi Ueha, Kenji Kondo, Takaharu Nito, Yoko Fujimaki, Hironobu Nishijima, Koichi Tsunoda, Francis H W Shand, Kouji Matsushima, Tatsuya Yamasoba
INTRODUCTION: The mechanisms underlying the effects of cigarette smoke and smoking cessation on respiratory secretion, especially in the larynx, remain unclear. OBJECTIVES: The aims of this study were to determine the effects of cigarette smoke and smoking cessation on laryngeal mucus secretion and inflammation, and to investigate the effects of glucocorticoid administration. METHODS: We administered cigarette smoke solution (CSS) to eight-week-old male Sprague Dawley rats for four weeks, then examined laryngeal mucus secretion and inflammatory cytokine expression on days 1, 28 and 90 after smoking cessation...
January 4, 2017: Toxicology Letters
https://www.readbyqxmd.com/read/27912076/activating-transcription-factor-3-is-essential-for-cigarette-smoke-induced-mucin-expression-via-interaction-with-activator-protein-1
#11
Yan-Ping Wu, Yin-Fang Wu, Chao Zhang, Hong-Bin Zhou, Chao Cao, Miao Li, Chen Zhu, Song-Min Ying, Zhi-Hua Chen, Hua-Hao Shen, Wen Li
Mucus hypersecretion is an important pathologic feature of chronic obstructive pulmonary disease. Activating transcription factor 3 (ATF3) is an adaptive-response gene that participates in various cellular processes. However, little is known about its role in cigarette smoke (CS)-induced mucus hyperproduction. This study aimed to investigate the role and molecular mechanisms of ATF3 in CS-induced Mucin 5AC (MUC5AC) expression. ATF3 was elevated in lung tissues of mice exposed to CS for 12 weeks. Treatment with CS extract significantly induced ATF3 expression and MUC5AC production in human bronchial epithelial cells, NCI-H292, and mouse tracheal epithelial cells...
November 29, 2016: American Journal of Pathology
https://www.readbyqxmd.com/read/27911216/validation-of-antibody-reagents-for-mucin-analysis-in-chronic-inflammatory-airway-diseases
#12
Thorsten Krause, Niels Röckendorf, Karoline I Gaede, Katrin Ramaker, Heike Sinnecker, Andreas Frey
In chronic inflammatory airway diseases, mucins display disease-related alterations in quantity, composition and glycosylation. This opens the possibility to diagnose and monitor inflammatory airway disorders and their exacerbation based on mucin properties. For such an approach to be reasonably versatile and diagnostically meaningful, the mucin of interest must be captured in a reliable, patient-independent way. To identify appropriate mucin-specific reagents, we tested anti-mucin antibodies on mucin-content-standardized, human bronchoalveolar lavage fluid samples in immunoblot assays...
December 2, 2016: MAbs
https://www.readbyqxmd.com/read/27884794/peroxiredoxin-6-suppresses-muc5ac-overproduction-in-lps-induced-airway-inflammation-through-h2o2-egfr-mapk-signaling-pathway
#13
Dong Yang, Meiling Jin, Chunxue Bai, Jian Zhou, Yao Shen
Mucus hypersecretion is a prominent mechanism in airway inflammation. Muc5ac is a major component of mucus and can be activated by reactive oxygen species (ROS). Peroxiredoxin 6 (Prdx6) highly expresses in airway epithelium and protects the airway from oxidative stress. In this study, we investigated the roles of Prdx6 in lipopolysaccharide (LPS)-induced mucin production in mice. We found that the levels of H2O2 and the Muc5ac mRNA were significantly increased in Prdx6 (-/-) mice compared to those in C57BL/6J mice after LPS instillation, which were markedly inhibited by epithelial growth factor receptor (EGFR) inhibitor Elrotinib...
February 2017: Respiratory Physiology & Neurobiology
https://www.readbyqxmd.com/read/27878831/i%C3%AE%C2%BAbns-induces-muc5ac-expression-in-epithelial-cells-and-causes-airway-hyper-responsiveness-in-murine-asthma-models
#14
M Yokota, T Tamachi, Y Yokoyama, Y Maezawa, H Takatori, A Suto, K Suzuki, K Hirose, K Takeda, H Nakajima
BACKGROUND: In allergic asthma, environmental allergens including house dust mite (HDM) trigger pattern recognition receptors and activate downstream signaling pathways including NF-κB pathways not only in immune cells but also in airway epithelial cells. Recent studies have shown that NF-κB activation is regulated positively or negatively depending on the cellular context by IκBNS (encoded by the gene Nfkbid), one of atypical IκB proteins, in the nucleus. Therefore, we hypothesized that IκBNS expressed in immune cells or epithelial cells is involved in the regulation of asthmatic responses...
November 6, 2016: Allergy
https://www.readbyqxmd.com/read/27870702/synchronous-ovarian-and-appendiceal-mucinous-neoplasms-in-the-absence-of-pseudomyxoma-peritonei
#15
Xianyong Gui, Jorge Escobar, Cheng-Han Lee, Máire A Duggan, Martin Köbel
BACKGROUND: Synchronous ovarian/appendiceal mucinous neoplasms sometimes occur in the absence of clinical pseudomyxoma peritonei (PMP), which raises a question about whether the 2 tumors could be independent. METHODS: We identified 11 cases of synchronous ovarian/appendiceal mucinous neoplasms without PMP and subclassified them into groups 1 and 2 based on the presence or absence of microscopic peritoneal/ovarian surface mucin deposits. A 7-marker panel (CK7, CK20, CDX2, PAX8, MUC1, MUC2, and MUC5AC) immunohistochemistry was performed on both tumors...
November 17, 2016: International Journal of Gynecological Cancer
https://www.readbyqxmd.com/read/27866297/nps2143-inhibits-muc5ac-and-proinflammatory-mediators-in-cigarette-smoke-extract-cse-stimulated-human-airway-epithelial-cells
#16
Jae-Won Lee, Ji-Won Park, Ok-Kyoung Kwon, Hee Jae Lee, Hye Gwang Jeong, Jae-Hong Kim, Sei-Ryang Oh, Kyoung-Seop Ahn
Mucus overproduction is a fundamental hallmark of COPD that is caused by exposure to cigarette smoke. MUC5AC is one of the main mucin genes expressed in the respiratory epithelium, and its transcriptional upregulation often correlates with increased mucus secretion. Calcium-sensing receptor (CaSR) antagonists have been reported to possess anti-inflammatory effects. The purpose of the present study was to investigate the protective role of NPS2143, a selective CaSR antagonist on cigarette smoke extract (CSE)-stimulated NCI-H292 mucoepidermoid human lung cells...
November 19, 2016: Inflammation
https://www.readbyqxmd.com/read/27859731/one-pot-ligation-oxidative-deselenization-at-selenocysteine-and-selenocystine
#17
Nicholas J Mitchell, Sameer S Kulkarni, Lara R Malins, Siyao Wang, Richard J Payne
The use of native chemical ligation at selenocysteine (Sec) residues with peptide thioesters and additive-free selenocystine ligation with peptides bearing phenyl selenoesters, in concert with one-pot oxidative deselenization chemistry, is described. These approaches provide a simple and rapid method for accessing native peptides with serine in place of Sec at the ligation junction. The efficiency of both variants of the one-pot ligation-oxidative deselenization chemistry is probed through the synthesis of a MUC5AC-derived glycopeptide...
November 16, 2016: Chemistry: a European Journal
https://www.readbyqxmd.com/read/27846863/prognostic-significance-of-mucin-expression-profiles-in-breast-carcinoma-with-signet-ring-cells-a-clinicopathological-study
#18
Ryuji Ohashi, Ayako Hayama, Keiko Yanagihara, Koji Yamashita, Takashi Sakatani, Hiroyuki Takei, Zenya Naito
BACKGROUND: Signet ring cells (SRCs) often accompany gastrointestinal carcinoma, referred to as SRC carcinoma; however, breast cancers containing SRCs have not been well characterized, leaving the prognostic significance of SRCs undetermined. We have described clinicopathological characteristics of patients with breast cancer containing SRCs in relation to the expression levels of MUC1, MUC2, MUC4, MUC5AC, and MUC6. METHODS: Twenty-two breast cancer cases with variable degrees of SRC population were retrospectively studied...
November 15, 2016: Diagnostic Pathology
https://www.readbyqxmd.com/read/27845589/abnormalities-in-muc5ac-and-muc5b-protein-in-airway-mucus-in-asthma
#19
Marrah E Lachowicz-Scroggins, Shaopeng Yuan, Sheena C Kerr, Eleanor M Dunican, Michelle Yu, Stephen D Carrington, John V Fahy
No abstract text is available yet for this article.
November 15, 2016: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/27845339/a-combination-of-muc5ac-and-ca19-9-improves-the-diagnosis-of-pancreatic-cancer-a-multicenter-study
#20
Sukhwinder Kaur, Lynette M Smith, Asish Patel, Melanie Menning, Duncan C Watley, Saad S Malik, Shiv Ram Krishn, Kavita Mallya, Abhijit Aithal, Aaron R Sasson, Sonny L Johansson, Maneesh Jain, Shailender Singh, Sushovan Guha, Chandrakanth Are, Massimo Raimondo, Michael A Hollingsworth, Randall E Brand, Surinder K Batra
OBJECTIVES: Pancreatic cancer (PC) is a lethal malignancy that lacks specific diagnostic markers. The present study explores the diagnostic potential of the most differentially overexpressed secretory mucin MUC5AC alone and in combination with CA19-9 using multi-center training and validation sets. METHODS: The expression of MUC5AC in benign pancreatic pathologies, PC precursor lesions, primary PC tissues and metastatic lesions was evaluated by immunohistochemistry...
November 15, 2016: American Journal of Gastroenterology
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