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Epithelial lining fluid

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https://www.readbyqxmd.com/read/29351436/therapeutic-attenuation-of-the-epithelial-sodium-channel-with-a-splunc1-derived-peptide-in-airway-diseases
#1
James F Collawn, Rafal Bartoszewski, Ahmad Lazrak, Sadis Matalon
The airway surface liquid (ASL) coats the lining of the airways and allows for efficient cilial movement and therefore effective mucociliary transport. Cell surface channels regulate the hydration status of the ASL and the two critical channels in the process are the cystic fibrosis transmembrane conductance regulator (CFTR) and the amiloride-sensitive epithelial sodium channel (ENaC). In cystic fibrosis (CF) and chronic obstructive pulmonary disease (COPD) there is loss of CFTR function or compromised CFTR function in chronic bronchitis, respectively...
January 4, 2018: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/29339391/intrapulmonary-pharmacokinetics-of-lascufloxacin-in-healthy-adult-volunteers
#2
Hidetoshi Furuie, Sayoko Tanioka, Keiko Shimizu, Shigeru Manita, Masaharu Nishimura, Hisao Yoshida
This study was performed to investigate the intrapulmonary penetration of lascufloxacin in humans. Thirty healthy adult male Japanese subjects, allocated into five groups, received lascufloxacin in single oral dose of 75 mg. Bronchoalveolar lavage and blood sampling were performed simultaneously in each subject at 1, 2, 4, 6, or 24 hours after administration, and lascufloxacin concentrations in plasma, epithelial lining fluid, and alveolar macrophages were determined. Lascufloxacin was rapidly distributed to the epithelial lining fluid with Tmax of 1 hour, which was identical to that in plasma...
January 16, 2018: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29332251/clinical-pharmacokinetics-and-pharmacodynamics-of-telavancin-compared-with-the-other-glycopeptides
#3
REVIEW
Valentin Al Jalali, Markus Zeitlinger
Telavancin was discovered by modifying the chemical structure of vancomycin and belongs to the group of lipoglycopeptides. It employs its antimicrobial potential through two distinct mechanisms of action: inhibition of bacterial cell wall synthesis and induction of bacterial membrane depolarization and permeabilization. In this article we review the clinically relevant pharmacokinetic and pharmacodynamic data of telavancin. For comparison, the pharmacokinetic and pharmacodynamic data of the other glycopeptides are presented...
January 13, 2018: Clinical Pharmacokinetics
https://www.readbyqxmd.com/read/29314167/comparative-histomorphological-study-of-endometrium-in-mares
#4
M Herrera, J M Herrera, S Cantatore, J Aguilar, A Felipe, E Fumuso
Uterine acute post-breeding inflammation is a physiological tissue response to the entry of exogenous elements, with persistent endometritis being the main pathology responsible for subfertility in the mare (Equus ferus caballus; Linnaeus, 1758). Mares can be classified as susceptible or resistant to endometritis according to their ability to remove intrauterine fluid within 48 hr after experimental inoculation. Endometrial biopsy is a technique that is commonly used to establish the degree of lesions that can affect the fertility of the mare...
January 3, 2018: Anatomia, Histologia, Embryologia
https://www.readbyqxmd.com/read/29311084/intrapulmonary-pharmacokinetics-of-relebactam-a-novel-%C3%AE-lactamase-inhibitor-dosed-in-combination-with-imipenem-cilastatin-in-healthy-subjects
#5
Matthew L Rizk, Elizabeth G Rhee, Patricia A Jumes, Mark H Gotfried, Tian Zhao, Eric Mangin, Sheng Bi, Cynthia M Chavez-Eng, Zufei Zhang, Joan R Butterton
This Phase I study assessed the intrapulmonary pharmacokinetic profiles of relebactam (MK-7655), a novel ß-lactamase inhibitor, and imipenem. Sixteen healthy subjects received 250 mg relebactam with 500 mg imipenem/cilastatin, given IV every 6 hours for 5 doses, and were randomized to bronchoscopy/broncho-alveolar lavage at 0.5, 1, 1.5, or 3 hours after the last dose (4 subjects per time point). Both drugs penetrated the epithelial lining fluid (ELF) to a similar degree, with profiles similar in shape to the corresponding plasma profiles and apparent terminal half-lives in plasma and ELF, respectively, of 1...
January 8, 2018: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29281616/influence-of-type-of-congenital-heart-defects-on-epithelial-lining-fluid-composition-in-infants-undergoing-cardiac-surgery-with-cardiopulmonary-bypass
#6
Manuela Simonato, Aldo Baritussio, Virgilio P Carnielli, Luca Vedovelli, Gianclaudio Falasco, Michele Salvagno, Massimo Padalino, Paola Cogo
BACKGROUND: In children with congenital heart disease (CHD), altered pulmonary circulation compromises gas exchange. Moreover, pulmonary dysfunction is a complication of cardiac surgery with cardiopulmonary bypass (CPB). No data are available on the effect of different CHDs on lung injury. The aim of this study was to analyze epithelial lining fluid (ELF) surfactant composition in children with CHD. METHODS: Tracheal aspirates (TAs) from 72 CHD children [age 2.9 (0...
December 27, 2017: Pediatric Research
https://www.readbyqxmd.com/read/29277683/new-aerosol-formulation-to-control-ciprofloxacin-pulmonary-concentration
#7
Barbara Lamy, Frederic Tewes, Dolores Remedios Serrano, Isabelle Lamarche, Patrice Gobin, William Couet, Anne Marie Healy, Sandrine Marchand
Ciprofloxacin (CIP) apparent permeability across a pulmonary epithelium model can be controlled by the affinity of its complex with a metal cation. The higher the complex affinity, the larger is the reduction in CIP apparent permeability. The aim of this study was to evaluate if the control of the CIP apparent permeability observed in vitro could be transposed in vivo to control the CIP lung-to-blood absorption rate and CIP concentrations in the lung epithelial lining fluid (ELF) after intratracheal (IT) administration...
December 22, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/29244031/transition-and-post-transition-metals-in-exhaled-breath-condensate
#8
Andrew Ghio, Michael C Madden, Charles R Esther
Water vapor in expired air, as well as dispersed non-volatile components, condense onto a cooler surface after exiting the respiratory tract. This exhaled breath condensate (EBC) provides a dilute sampling of the epithelial lining fluid. Accordingly, the collection of EBC imparts a capacity to provide biomarkers of injury preceding clinical disease. Concentrations of transition and post-transition metals in EBC are included among these endpoints. Iron and zinc are those metals in highest concentration and are measurable in all EBC samples from healthy subjects; other metals are most frequently either at or below the level of detection in this group...
December 15, 2017: Journal of Breath Research
https://www.readbyqxmd.com/read/29242308/chemokine-c-c-motif-receptor-like-2-is-not-essential-for-lung-injury-lung-inflammation-or-airway-hyperresponsiveness-induced-by-acute-exposure-to-ozone
#9
Farhan Malik, Kevin R Cromar, Constance L Atkins, Roger E Price, William T Jackson, Saad R Siddiqui, Chantal Y Spencer, Nicholas C Mitchell, Ikram U Haque, Richard A Johnston
Inhalation of ozone (O3), a gaseous air pollutant, causes lung injury, lung inflammation, and airway hyperresponsiveness. Macrophages, mast cells, and neutrophils contribute to one or more of these sequelae induced by O3 Furthermore, each of these aforementioned cells express chemokine (C-C motif) receptor-like 2 (Ccrl2), an atypical chemokine receptor that facilitates leukocyte chemotaxis. Given that Ccrl2 is expressed by cells essential to the development of O3-induced lung pathology and that chemerin, a Ccrl2 ligand, is increased in bronchoalveolar lavage fluid (BALF) by O3, we hypothesized that Ccrl2 contributes to the development of lung injury, lung inflammation, and airway hyperresponsiveness induced by O3 To that end, we measured indices of lung injury (BALF protein, BALF epithelial cells, and bronchiolar epithelial injury), lung inflammation (BALF cytokines and BALF leukocytes), and airway responsiveness to acetyl-β-methylcholine chloride (respiratory system resistance) in wild-type and mice genetically deficient in Ccrl2 (Ccrl2-deficient mice) 4 and/or 24 hours following cessation of acute exposure to either filtered room air (air) or O3 In air-exposed mice, BALF chemerin was greater in Ccrl2-deficient as compared to wild-type mice...
December 2017: Physiological Reports
https://www.readbyqxmd.com/read/29234672/vamp8-mucin-exocytosis-attenuates-intestinal-pathogenesis-by-entamoeba-histolytica
#10
COMMENT
Steve Cornick, France Moreau, Herbert Y Gaisano, Kris Chadee
The intestinal mucosa encounters a barrage of ingested insults within the host yet under homeostasis elegantly facilitates nutrient absorption and sustenance of the commensal microbiota. An essential defence mechanism employed by the host is limiting the spatial niche various microbes may occupy as executed by the fluid mucus layer. Pathogens that violate their restricted niche within the intestinal mucosa are first expelled by robust mucus secretion from goblet cells thus by-passing the need for an immune response...
November 27, 2017: Microbial Cell
https://www.readbyqxmd.com/read/29233112/napsin-a-levels-in-epithelial-lining-fluid-as-a-diagnostic-biomarker-of-primary-lung-adenocarcinoma
#11
Akifumi Uchida, Takuya Samukawa, Tomohiro Kumamoto, Masahiro Ohshige, Kazuhito Hatanaka, Yoshihiro Nakamura, Keiko Mizuno, Ikkou Higashimoto, Masami Sato, Hiromasa Inoue
BACKGROUND: It is crucial to develop novel diagnostic approaches for determining if peripheral lung nodules are malignant, as such nodules are frequently detected due to the increased use of chest computed tomography scans. To this end, we evaluated levels of napsin A in epithelial lining fluid (ELF), since napsin A has been reported to be an immunohistochemical biomarker for histological diagnosis of primary lung adenocarcinoma. METHODS: In consecutive patients with indeterminate peripheral lung nodules, ELF samples were obtained using a bronchoscopic microsampling (BMS) technique...
December 12, 2017: BMC Pulmonary Medicine
https://www.readbyqxmd.com/read/29229667/prostate-organogenesis
#12
Jeffrey C Francis, Amanda Swain
The prostate is a male exocrine gland that secretes components of the seminal fluid. In men, prostate tumors are one of the most prevalent cancers. Studies on the development of the prostate have given a better understanding of the processes and genes that are important in the formation of this organ and have provided insights into the mechanisms of prostate tumorigenesis. These developmental studies have provided evidence that some of the genes and signaling pathways involved in development are reactivated or deregulated during prostate cancer...
December 11, 2017: Cold Spring Harbor Perspectives in Medicine
https://www.readbyqxmd.com/read/29229637/elucidating-the-pharmacokinetics-pharmacodynamics-of-aerosolized-colistin-against-multidrug-resistant-acinetobacter-baumannii-and-klebsiella-pneumoniae-in-a-mouse-lung-infection-model
#13
Yu-Wei Lin, Qi Tony Zhou, Mei-Ling Han, Ke Chen, Nikolas J Onufrak, Jiping Wang, John D Turnidge, Benjamin P Howden, Alan Forrest, Hak-Kim Chan, Jian Li
Pharmacokinetics/pharmacodynamics (PK/PD) of aerosolized colistin was investigated against Acinetobacter baumannii and Klebsiella pneumoniae over 24 h in a neutropenic mouse lung infection model. Dose fractionation studies were performed over 2.64 to 23.8 mg/kg/day, and the data were fitted to a sigmoid inhibitory model. AUC/MIC in the epithelial lining fluid was the most predictive PK/PD index for aerosolized colistin against both pathogens. Our study provides important pharmacological information for optimizing aerosolized colistin...
December 11, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29228414/temporal-changes-of-inflammatory-cytokine-profiles-in-epithelial-lining-fluid-in-a-canine-lung-transplant-model
#14
Atsushi Wada, Mitsutomo Kohno, Kana Oiwa, Ryo Hashimoto, Takahisa Koizumi, Yusuke Nakamura, Tomoki Nakagawa, Ryota Masuda, Kichizo Kaga, Masayuki Iwazaki
OBJECTIVES: Ischemia-reperfusion injury resulting in post-transplant lung dysfunction involves a complicated network of cytokines that has yet to be fully investigated. We analyzed temporal changes in cytokine levels in epithelial lining fluid (ELF) from the distal airways of a canine lung transplantation model. METHODS: Ischemic time was set to 18 hours to enhance lung injury in a left single-lung transplantation model. ELF was collected via bronchoscopic microsampling, a minimally-invasive technique allowing repeated sampling, hourly up to 5 hours after reperfusion started...
December 20, 2017: Tokai Journal of Experimental and Clinical Medicine
https://www.readbyqxmd.com/read/29218325/protection-of-meconium-induced-lung-epithelial-injury-by-protease-inhibitors
#15
C Ota, I Gopallawa, V Ivanov, I H Gewolb, B D Uhal
Earlier work form this laboratory showed that exposure of alveolar epithelial cells (AECs) to meconium caused significant cell detachment and that meconium-induced detachment of cells was prevented by a protease inhibitor cocktail. Therefore, it was hypothesized that protease inhibitors might protect AEC monolayers against meconium-induced collapse of epithelial barrier function both in vitro and in vivo. To investigate this theory in vitro, albumin flux was measured across cultured, confluent monolayers of human type II derived cell line A549 on microporous filter inserts...
2017: Journal of Lung, Pulmonary & Respiratory Research
https://www.readbyqxmd.com/read/29187587/modulation-of-the-alternative-pathway-of-complement-by-murine-factor-h-related-proteins
#16
Alexandra H Antonioli, Janice White, Frances Crawford, Brandon Renner, Kevin J Marchbank, Jonathan P Hannan, Joshua M Thurman, Philippa Marrack, V Michael Holers
Factor H (FH) is a key alternative pathway regulator that controls complement activation both in the fluid phase and on specific cell surfaces, thus allowing the innate immune response to discriminate between self and foreign pathogens. However, the interrelationships between FH and a group of closely related molecules, designated the FH-related (FHR) proteins, are currently not well understood. Whereas some studies have suggested that human FHR proteins possess complement regulatory abilities, recent studies have shown that FHR proteins are potent deregulators...
November 29, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29185215/nickle-ii-ions-exacerbate-bleomycin-induced-pulmonary-inflammation-and-fibrosis-by-activating-the-ros-akt-signaling-pathway
#17
Lawei Yang, Ziying Lin, Yahong Wang, Chunyan Li, Wenya Xu, Qinglan Li, Weimin Yao, Zeqing Song, Gang Liu
Nickle (Ni) is a heavy metal found in particulate matter. We previously reported that Ni ions are strongly associated with high apoptosis rates and high expression of IL-1β in human bronchial epithelial cells following exposure to PM2.5; however, the effects of Ni ions on pulmonary fibrosis have not been fully elucidated. In the current study, we evaluated whether Ni ions can exacerbate bleomycin (BLM)-induced pulmonary fibrosis in a mouse model and illustrated the potential mechanism. Ni ions inhibited cell proliferation and induced apoptosis in A549 and MRC-5 cells...
November 28, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29166379/bcfa-enriched-vernix-monoacylglycerol-reduces-lps-induced-inflammatory-markers-in-human-enterocytes-in-vitro
#18
Yuanyuan Yan, Zhen Wang, Donghao Wang, Peter Lawrence, Xingguo Wang, Kumar S D Kothapalli, Jacelyn Greenwald, Ruijie Liu, Hui Gyu Park, J Thomas Brenna
BACKGROUND: Excess vernix caseosa produced by the fetal skin appears as particles suspended in the amniotic fluid in late gestation, is swallowed by the fetus and is found throughout the newborn GI tract as the first organisms are arriving to colonize the gut. Lipid rich vernix contains an unusually high 29% branched chain fatty acid (BCFA). BCFA reduce the incidence of necrotizing enterocolitis in an animal model, recently found predominantly in the sn-2 position of human milk triacylglycerols...
November 22, 2017: Pediatric Research
https://www.readbyqxmd.com/read/29161347/pharmacological-blockage-of-the-cxcr4-cxcl12-axis-in-endometriosis-leads-to-contrasting-effects-in-proliferation-migration-and-invasion
#19
Abigail Ruiz, Lynnette Ruiz, Mariano Colón-Caraballo, Bryan J Torres-Collazo, Janice B Monteiro, Manuel Bayona, Asgerally T Fazleabas, Idhaliz Flores
High levels of inflammatory factors including chemokines have been reported in peritoneal fluid and blood of women with endometriosis. CXCL12 mediates its action by interaction with its specific receptor, CXCR4, which has been reported to be elevated in human endometriosis lesions and in the rat model of endometriosis. Activation of the CXCR4-CXCL12 axis increases cell proliferation, migration and invasion of cancer cells. To obtain insights into the CXCR4 expression profile in lesions and endometrium, as well as functionality of the CXCR4-CXCL12 axis in endometriosis we analysed the expression of CXCR4 in tissues on a human tissue array and studied CXCL12-mediated activation of proliferation, invasion, and migration in vitro...
November 17, 2017: Biology of Reproduction
https://www.readbyqxmd.com/read/29155854/profiling-of-proteins-secreted-in-the-bovine-oviduct-reveals-diverse-functions-of-this-luminal-microenvironment
#20
Viju Vijayan Pillai, Darren M Weber, Brett S Phinney, Vimal Selvaraj
The oviductal microenvironment is a site for key events that involve gamete maturation, fertilization and early embryo development. Secretions into the oviductal lumen by either the lining epithelium or by transudation of plasma constituents are known to contain elements conducive for reproductive success. Although previous studies have identified some of these factors involved in reproduction, knowledge of secreted proteins in the oviductal fluid remains rudimentary with limited definition of function even in extensively studied species like cattle...
2017: PloS One
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