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https://www.readbyqxmd.com/read/28937961/regulation-of-chromatin-assembly-and-cell-transformation-by-formaldehyde-exposure-in-human-cells
#1
Danqi Chen, Lei Fang, Shenglin Mei, Hongjie Li, Xia Xu, Thomas L Des Marais, Kun Lu, X Shirley Liu, Chunyuan Jin
BACKGROUND: Formaldehyde (FA) is an environmental and occupational chemical carcinogen. Recent studies have shown that exogenous FA causes only a modest increase in DNA adduct formation compared with the amount of adducts formed by endogenous FA, raising the possibility that epigenetic mechanisms may contribute to FA-mediated carcinogenicity. OBJECTIVES: We investigated the effects of FA exposure on histone modifications and chromatin assembly. We also examined the role of defective chromatin assembly in FA-mediated transcription and cell transformation...
September 21, 2017: Environmental Health Perspectives
https://www.readbyqxmd.com/read/28930832/early-central-and-peripheral-corneal-microstructural-changes-in-type-2-diabetes-mellitus-patients-identified-using-in-vivo-confocal-microscopy-a-case-control-study
#2
Jing-Hao Qu, Lei Tian, Xiao-Yu Zhang, Xu-Guang Sun
The aim of this study was to find early central and peripheral corneal microstructural changes in healthy subjects and type 2 diabetes mellitus (T2DM) patients with/without cornea fluorescein dot staining.This is a prospective case-control study of T2DM patients with/without cornea fluorescein dot staining. Age, sex, duration of diabetes, and serum glycosylated hemoglobin A1c (HbA1c) levels were recorded. Keratograph 5 M (K5 M) and in vivo confocal microscopy were performed on all subjects. The cornea was divided into 5 zones: central, superior, temporal, nasal, and inferior...
September 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28929080/sinonasal-schwannoma-a-rare-sinonasal-neoplasm
#3
Satish Kumar, Chanmiki Sayoo
Neoplasm in sinonasal cavity is dominated by epithelial type. Sinonasal schwannoma is a rare entity represent less than four percent of head and neck schwannoma. Clinically this tumour is commonly misdiagnosed until they are confirmed by histopathological examination. We present a case of schwannoma in sinonasal region with involvement of right side nasal cavity, maxillary sinus and maxillary alveolar process. The tumour was successfully removed by midfacial degloving approach.
September 2017: Indian Journal of Otolaryngology and Head and Neck Surgery
https://www.readbyqxmd.com/read/28923321/nose-to-brain-delivery-of-rivastigmine-by-in-situ-gelling-cationic-nanostructured-lipid-carriers-enhanced-brain-distribution-and-pharmacodynamics
#4
Preeti Wavikar, Rohan Pai, Pradeep Vavia
Present investigation explores the potential of Nanostructured Lipid Carriers (NLCs) for nose to brain delivery of Rivastigmine (RV), which is further enhanced by incorporating into an in-situ gelling system, increasing retention in nasal cavity. NLC's having particle size of 123.2±2.3 nm, entrapment efficiency of 68.3±3.4% and zeta potential of 32±1.2 mV was fabricated by a scalable method. Pharmacokinetics showed sustained release of intranasal (IN) and intravenous (IV) NLC's compared to RV solution by same route, with significantly higher AUC and Thalf...
September 15, 2017: Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28923049/roflumilast-reverses-cftr-mediated-ion-transport-dysfunction-in-cigarette-smoke-exposed-mice
#5
S Vamsee Raju, Lawrence Rasmussen, Peter A Sloane, Li Ping Tang, Emily Falk Libby, Steven M Rowe
BACKGROUND: Dysfunction in cystic fibrosis transmembrane conductance regulator (CFTR) can be elicited by cigarette smoke and is observed in patients with chronic bronchitis. We have previously demonstrated in human airway epithelial cell monolayers that roflumilast, a clinically approved phosphodiesterase 4 inhibitor that reduces the risk of exacerbations in chronic obstructive pulmonary disease patients with chronic bronchitis and a history of exacerbations, activates CFTR-dependent chloride secretion via a cAMP-mediated pathway, partially restores the detrimental effects of cigarette smoke on CFTR-mediated ion transport, and increases CFTR-dependent gastrointestinal fluid secretion in isolated murine intestine segments...
September 18, 2017: Respiratory Research
https://www.readbyqxmd.com/read/28919709/puerarin-transport-across-rat-nasal-epithelial-cells-and-the-influence-of-compatibility-with-peoniflorin-and-menthol
#6
Lin Zhang, Shou-Ying Du, Yang Lu, Chang Liu, Hui-Chao Wu, Zhi-Hao Tian, Min Wang, Chang Yang
Nose-to-brain transport can provide an excellent pathway for drugs of the central nervous system. Consequently, how to make full use of this pathway in practical applications has become a focus of drug design. However, many aspects affecting drug delivery from the nose to the brain remain unclear. This study aimed to more deeply investigate the transport of puerarin and to explore the mechanism underlying the influence of compatible drugs on puerarin permeability in a primary cell model simulating the nasal mucosa...
2017: Drug Design, Development and Therapy
https://www.readbyqxmd.com/read/28917988/a-comprehensive-screening-platform-for-aerosolizable-protein-formulations-for-intranasal-and-pulmonary-drug-delivery
#7
Martina Röhm, Stefan Carle, Frank Maigler, Johannes Flamm, Viktoria Kramer, Chrystelle Mavoungou, Otmar Schmid, Katharina Schindowski
Aerosolized administration of biopharmaceuticals to the airways is a promising route for nasal and pulmonary drug delivery, but - in contrast to small molecules - little is known about the effects of aerosolization on safety and efficacy of biopharmaceuticals. Proteins are sensitive against aerosolization-associated shear stress. Tailored formulations can shield proteins and enhance permeation, but formulation development requires extensive screening approaches. Thus, the aim of this study was to develop a cell-based in vitro technology platform that includes screening of protein quality after aerosolization and transepithelial permeation...
September 13, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28917415/bilateral-corneal-epithelial-macrocysts-following-hyperopic-laser-in-situ-keratomileusis
#8
Mahmoud O Jaroudi, Carole G Cherfan, Shady T Awwad
A 27-year-old woman had microkeratome-assisted laser in situ keratomileusis (LASIK) for moderate bilateral hyperopia. The preoperative ophthalmologic examination was unremarkable except for minimal lissamine green staining bilaterally on the nasal conjunctiva. On the first postoperative day, the uncorrected distance visual acuity (UDVA) was 20/20 bilaterally and the corneas were clear. Four days later, the patient presented with mild blur in both eyes. Examination showed diffuse bilateral epithelial cysts encompassing the central 6...
August 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28912627/il-25-could-be-involved-in-the-development-of-allergic-rhinitis-sensitized-to-house-dust-mite
#9
Dae Woo Kim, Dong-Kyu Kim, Kyoung Mi Eun, Jun-Sang Bae, Young-Jun Chung, Jun Xu, Yong Min Kim, Ji-Hun Mo
BACKGROUND AND PURPOSE: When house dust mite (HDM), a common allergen, comes into the mucosal membrane, it may stimulate innate immunity. However, the precise role of interleukin- (IL-) 25 in the development of HDM-induced nasal allergic inflammation is still unclear. Therefore, we investigated the role of IL-25 in allergic rhinitis (AR) patients sensitized to HDM. METHODS: To confirm the production of IL-25 in human nasal epithelial cells (HNECs), we stimulated HNECs...
2017: Mediators of Inflammation
https://www.readbyqxmd.com/read/28887633/periostin-in-inflammation-and-allergy
#10
REVIEW
Kenji Izuhara, Satoshi Nunomura, Yasuhiro Nanri, Masahiro Ogawa, Junya Ono, Yasutaka Mitamura, Tomohito Yoshihara
We found for the first time that IL-4 and IL-13, signature type 2 cytokines, are able to induce periostin expression. We and others have subsequently shown that periostin is highly expressed in chronic inflammatory diseases-asthma, atopic dermatitis, eosinophilc chronic sinusitis/chronic rhinosinusitis with nasal polyp, and allergic conjunctivitis-and that periostin plays important roles in the pathogenesis of these diseases. The epithelial/mesenchymal interaction via periostin is important for the onset of allergic inflammation, in which periostin derived from fibroblasts acts on epithelial cells or fibroblasts, activating their NF-κB...
September 8, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28886270/airway-epithelial-barrier-dysfunction-in-the-pathogenesis-and-prognosis-of-respiratory-tract-diseases-in-childhood-and-adulthood
#11
Hasan Yuksel, Ahmet Turkeli
The lungs are in direct contact with the environment through the tubular structure that constitutes the airway. Starting from the nasal orifice, the airway is exposed to foreign particles including infectious agents, allergens, and other substances that can damage the airways. Therefore, the airway must have a functional epithelial barrier both in the upper and lower airways to protect against these threats. As with the skin, it is likely that the pathogenesis of respiratory diseases is a consequence of epithelial barrier defects in these airways...
August 16, 2017: Tissue Barriers
https://www.readbyqxmd.com/read/28883651/the-role-of-transcriptional-factor-p63-in-regulation-of-epithelial-barrier-and-ciliogenesis-of-human-nasal-epithelial-cells
#12
Yakuto Kaneko, Takayuki Kohno, Takuya Kakuki, Ken-Ichi Takano, Noriko Ogasawara, Ryo Miyata, Shin Kikuchi, Takumi Konno, Tsuyoshi Ohkuni, Ryoto Yajima, Akito Kakiuchi, Shin-Ichi Yokota, Tetsuo Himi, Takashi Kojima
Disruption of nasal epithelial tight junctions (TJs) and ciliary dysfunction are found in patients with chronic rhinosinusitis (CRS) and nasal polyps (NPs), along with an increase of p63-positive basal cells and histone deacetylase (HDAC) activity. To investigate these mechanisms, primary cultures of HNECs transfected with human telomerase reverse transcriptase (hTERT-HNECs) were transfected with siRNAs of TAp63 and ΔNp63, treated with the NF-kB inhibitor curucumin and inhibitors of HDACs, and infected with respiratory syncytial virus (RSV)...
September 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28875443/sinonasal-tract-alveolar-rhabdomyosarcoma-in-adults-a-clinicopathologic-and-immunophenotypic-study-of-fifty-two-cases-with-emphasis-on-epithelial-immunoreactivity
#13
Lester D R Thompson, Vickie Y Jo, Abbas Agaimy, Antonio Llombart-Bosch, Gema Nieto Morales, Isidro Machado, Uta Flucke, Paul E Wakely, Markku Miettinen, Justin A Bishop
Sinonasal tract (SNT) alveolar rhabdomyosarcoma (ARMS) are frequently misdiagnosed, especially in adults. Fifty-two adult (≥18 years) patients with SNT ARMS were reviewed and characterized by immunohistochemistry and molecular studies. Twenty-six females and 26 males (18-72 years; mean 43.2 years), presented after a short duration (mean 2.6 months) with a large (mean 5.5 cm) destructive nasal cavity mass, involving multiple contiguous paranasal sites (n = 46) and with cervical adenopathy (n = 41)...
September 5, 2017: Head and Neck Pathology
https://www.readbyqxmd.com/read/28875091/demographics-of-head-and-neck-cancer-patients-a-single-institution-experience
#14
George S Stoyanov, Martina Kitanova, Deyan L Dzhenkov, Peter Ghenev, Nikolay Sapundzhiev
Introduction Head and neck cancer (HNC) comprises a diverse group of oncological entities, originating from various tissue types and organ localizations, situated in the topographical regions of the head and neck (H&N). This single institution retrospective study was aimed at establishing the HNC patient demographics and categorizing the individual incidence of H&N malignancies, regarding their organ of origin and main histopathological type. Materials and methods All histologically verified cases of HNC from a single tertiary referral center were reviewed in a descriptive retrospective manner...
July 2, 2017: Curēus
https://www.readbyqxmd.com/read/28866209/the-application-of-silver-nano-particles-on-developing-potential-treatment-for-chronic-rhinosinusitis-antibacterial-action-and-cytotoxicity-effect-on-human-nasal-epithelial-cell-model
#15
Shyuan-Yow Chen, Min-Tsan Huang, Sylvia L F Pender, Muhammad Ruslin, Hsin-Hua Chou, Keng-Liang Ou
Chronic rhinosinusitis (CRS) has raised attentions both in many countries due to its high relapsing rate and the resistance of certain treatments especially antibiotics application on both acute and chronic bacterial rhinosinusitis. The aim of this research is stressing on developing an effective alternative treatment for treating CRS and reducing the use of antibiotics to avoid further resistance forming. The antibacterial functions of silver nano-particles (AgNPs) are well known according to previous reports and studies...
November 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28861755/clarithromycin-decreases-rhinovirus-replication-and-cytokine-production-in-nasal-epithelial-cells-from-subjects-with-bronchial-asthma-effects-on-il-6-il-8-and-il-33
#16
Mutsuo Yamaya, Kazuhiro Nomura, Kazuya Arakawa, Mitsuru Sugawara, Xue Deng, Nadine Lusamba Kalonji, Hidekazu Nishimura, Mitsuhiro Yamada, Ryoichi Nagatomi, Tetsuaki Kawase
Rhinoviral infection is associated with an increased risk of asthma attacks. The macrolide clarithromycin decreases cytokine production in nasopharyngeal aspirates from patients with wheezing, but the effects of macrolides on cytokine production in nasal epithelial cells obtained from asthmatic subjects remain unclear. Here, human nasal epithelial cells were infected with type-14 rhinovirus (RV14), a major RV group. Titers and RNA of RV14 and cytokine concentrations, including IL-1β and IL-6, were higher in the supernatants of the cells obtained from subjects with bronchial asthma (asthmatic group) than in those from the non-asthmatic group...
August 31, 2017: Archives of Pharmacal Research
https://www.readbyqxmd.com/read/28856683/regulation-of-claudin-4-via-p63-in-human-epithelial-cells
#17
REVIEW
Takashi Kojima, Takayuki Kohno, Terufumi Kubo, Yakuto Kaneko, Takuya Kakuki, Akito Kakiuchi, Makoto Kurose, Ken-Ichi Takano, Noriko Ogasawara, Kazufumi Obata, Kazuaki Nomura, Ryo Miyata, Takumi Konno, Shingo Ichimiya, Tetsuo Himi
P63 is a regulator of cell-cell junction complexes in the epidermis. Claudin-4 is regulated via various factors in normal epithelial cells and diseases. We found that claudin-4 was directly regulated via p63 (TAp63 and ΔNp63) in human keratinocytes and nasal epithelial cells. In the epidermis of atopic dermatitis (AD), which contains ΔNp63-deficient keratinocytes, high expression of claudin-4 was observed. In primary keratinocytes, downregulation of ΔNp63 by treatment with short interfering RNA (siRNA)-p63 induced claudin-4 expression...
August 30, 2017: Annals of the New York Academy of Sciences
https://www.readbyqxmd.com/read/28853905/airway-mucosal-host-defense-is-key-to-genomic-regulation-of-cystic-fibrosis-lung-disease-severity
#18
Deepika Polineni, Hong Dang, Paul J Gallins, Lisa C Jones, Rhonda G Pace, Jaclyn R Stonebraker, Leah A Commander, Jeanne E Krenicky, Yi-Hui Zhou, Harriet Corvol, Garry R Cutting, Mitchell L Drumm, Lisa J Strug, Michael P Boyle, Peter R Durie, James F Chmiel, Fei Zou, Fred A Wright, Wanda K O'Neal, Michael R Knowles
RATIONALE: The severity of cystic fibrosis (CF) lung disease varies widely, even for Phe508del homozygotes. Heritability studies show that >50% of the variability reflects non-CFTR genetic variation; however the full extent of the pertinent genetic variation is not known. OBJECTIVES: We sought to identify novel CF disease-modifying mechanisms using an integrated approach based on analyzing "in vivo" CF airway epithelial gene expression, complemented with genome-wide association study (GWAS) data...
August 30, 2017: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/28837619/ll-37-causes-cell-death-of-human-nasal-epithelial-cells-which-is-inhibited-with-a-synthetic-glycosaminoglycan
#19
Andrew J Thomas, Abigail Pulsipher, Brock M Davis, Jeremiah A Alt
LL-37 is an immune peptide that regulates innate and adaptive immune responses in the upper airways. Elevated levels of LL-37 have been linked to cell death and inflammatory diseases, such as chronic rhinosinusitis (CRS). Glycosaminoglycans (GAGs) are polysaccharides that are found on respiratory epithelial cells and serve important roles in mucosal surface repair. Recent findings suggest that a synthetic glycosaminoglycan (GM-0111) can protect against LL-37-induced sinonasal mucosal inflammation and cell death in a murine model of acute RS...
2017: PloS One
https://www.readbyqxmd.com/read/28833606/dna-methylation-profiles-between-airway-epithelium-and-proxy-tissues-in-children
#20
Rossa Brugha, Robert Lowe, A John Henderson, John W Holloway, Vardhman Rakyan, Eva Wozniak, Nadiya Mahmud, Kay Seymour, Jonathan Grigg, Seif O Shaheen
AIM: Epidemiological studies of deoxyribonucleic acid (DNA) methylation in airway disease have largely been conducted using blood or buccal samples. However, given tissue specificity of DNA methylation, these surrogate tissues may not allow reliable inferences about methylation in the lung. We sought to compare the pattern of DNA methylation in blood, buccal and nasal epithelial cells to that in airway epithelial cells from children. METHODS: Samples of blood, and buccal, nasal and airway epithelium were obtained from six children undergoing elective anaesthesia for adenotonsillectomy...
August 18, 2017: Acta Paediatrica
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