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Surfactant deficiency

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https://www.readbyqxmd.com/read/29127920/uptake-and-phytotoxic-effect-of-benzalkonium-chlorides-in-lepidium-sativum-and-lactuca-sativa
#1
Adnan Hossain Khan, Mark Libby, Daniel Winnick, John Palmer, Mark Sumarah, Madhumita B Ray, Sheila M Macfie
Cationic surfactants such as benzalkonium chlorides (BACs) are used extensively as biocides in hospitals, food processing industries, and personal care products. BACs have the potential to reach the rooting zone of crop plants and BACs might thereby enter the food chain. The two most commonly used BACs, benzyl dimethyl dodecyl ammonium chloride (BDDA) and benzyl dimethyl tetradecyl ammonium chloride (BDTA), were tested in a hydroponic system to assess the uptake by and phytotoxicity to lettuce (Lactuca sativa L...
November 8, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/29067996/the-survival-of-fetal-and-bone-marrow-monocyte-derived-alveolar-macrophages-is-promoted-by-cd44-and-its-interaction-with-hyaluronan
#2
Y Dong, G F T Poon, A A Arif, S S M Lee-Sayer, M Dosanjh, P Johnson
Alveolar macrophages maintain lung homeostasis by performing important roles in immunosurveillance and lung surfactant catabolism. They express high levels of CD44 and are one of the few macrophage populations that constitutively bind hyaluronan, a ligand for CD44 and component of pericellular and extracellular matrices. Using adoptive transfer experiments and a mouse model of inflammation, we found that alveolar macrophages are initially depleted after an inflammatory insult then rapidly self-renew and return to original numbers after the resolution phase...
October 25, 2017: Mucosal Immunology
https://www.readbyqxmd.com/read/28922348/stem-cell-biology-and-regenerative-medicine-for-neonatal-lung-diseases
#3
REVIEW
Martin Kang, Bernard Thébaud
Lung diseases remain one of the main causes of morbidity and mortality in neonates. Cell therapy and regenerative medicine have the potential to revolutionize the management of life-threatening and debilitating lung diseases that currently lack effective treatments. Over the past decade, the repair capabilities of stem/progenitor cells have been harnessed to prevent/rescue lung damage in experimental neonatal lung diseases. Mesenchymal stromal cells and amnion epithelial cells exert pleiotropic effects and represent ideal therapeutic cells for bronchopulmonary dysplasia, a multifactorial disease...
October 18, 2017: Pediatric Research
https://www.readbyqxmd.com/read/28916727/inflammatory-responses-induce-an-identity-crisis-of-alveolar-macrophages-leading-to-pulmonary-alveolar-proteinosis
#4
Risa Ebina-Shibuya, Mitsuyo Matsumoto, Makoto Kuwahara, Kyoung-Jin Jang, Manabu Sugai, Yoshiaki Ito, Ryo Funayama, Keiko Nakayama, Yuki Sato, Naoto Ishii, Yasunobu Okamura, Kengo Kinoshita, Kohei Kometani, Tomohiro Kurosaki, Akihiko Muto, Masakazu Ichinose, Masakatsu Yamashita, Kazuhiko Igarashi
Pulmonary alveolar proteinosis (PAP) is a severe respiratory disease characterized by dyspnea caused by accumulation of surfactant protein. Dysfunction of alveolar macrophages (AMs), which regulate the homeostasis of surfactant protein, leads to the development of PAP; for example, in mice lacking BTB and CNC homology 2 (Bach2). However, how Bach2 helps prevent PAP is unknown, and the cell-specific effects of Bach2 are undefined. Using mice lacking Bach2 in specific cell types, we found that the PAP phenotype of Bach2-deficient mice is due to Bach2 deficiency in more than two types of immune cells...
November 3, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28888561/delayed-presentation-and-prolonged-survival-of-a-child-with-surfactant-protein-b-deficiency
#5
Juan A López-Andreu, Antonio D Hidalgo-Santos, Miguel A Fuentes-Castelló, Nuria Mancheño-Franch, Juan A Cerón-Pérez, Maria J Esteban-Ricós, Laia Pedrola-Vidal, Lawrence M Nogee
Surfactant protein B encoding gene mutations have been related to early onset fatal respiratory distress in full-term neonates. We report a school-aged male child homozygous for a surfactant protein B encoding gene missense mutation who presented after the neonatal period. His respiratory insufficiency responded to high dose intravenous methylprednisolone and hydroxychloroquine.
September 6, 2017: Journal of Pediatrics
https://www.readbyqxmd.com/read/28878025/gallbladder-derived-surfactant-protein-d-regulates-gut-commensal-bacteria-for-maintaining-intestinal-homeostasis
#6
Hana Sarashina-Kida, Hideo Negishi, Junko Nishio, Wataru Suda, Yuki Nakajima, Mika Yasui-Kato, Keiko Iwaisako, Sujin Kang, Nobuyasu Endo, Hideyuki Yanai, Masataka Asagiri, Hiroshi Kida, Masahira Hattori, Atsushi Kumanogoh, Tadatsugu Taniguchi
The commensal microbiota within the gastrointestinal tract is essential in maintaining homeostasis. Indeed, dysregulation in the repertoire of microbiota can result in the development of intestinal immune-inflammatory diseases. Further, this immune regulation by gut microbiota is important systemically, impacting health and disease of organ systems beyond the local environment of the gut. What has not been explored is how distant organs might in turn shape the microbiota via microbe-targeted molecules. Here, we provide evidence that surfactant protein D (SP-D) synthesized in the gallbladder and delivered into intestinal lumen binds selectively to species of gut commensal bacteria...
September 19, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28873200/mac-1-deficiency-induces-respiratory-failure-by-affecting-type-i-alveolar-epithelial-cells
#7
J Wang, Y B Ci, C L Liu, H M Sun
As a β2 integrin family member, Mac-1 plays an important role in the inflammatory response. Inflammation and lung injury are closely associated, but the involvement of Mac-1 in the occurrence and development of such pathologies remains poorly understood. We aimed to investigate the relationship between Mac-1 deficiency and respiratory failure in Mac-1 knockout {Mac-1(-/-)} mice, using C57BL/6J mice as a control. The newborn survival rate of Mac-1(-/-) mice was calculated, and mouse lung tissue was treated with hematoxylin and eosin and subjected to immunofluorescent staining...
August 31, 2017: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/28854814/function-and-safety-of-lentivirus-mediated-gene-transfer-for-csf2ra-deficiency
#8
Miriam Hetzel, Takuji Suzuki, Anna Rafiei Hashtchin, Paritha Arumugam, Brenna Carey, Marc Schwabbauer, Alexandra Kuhn, Johann Meyer, Axel Schambach, Johannes Van Der Loo, Thomas Moritz, Bruce C Trapnell, Nico Lachmann
Hereditary pulmonary alveolar proteinosis (hPAP) is a rare disorder of pulmonary surfactant accumulation and hypoxemic respiratory failure caused by mutations in CSF2RA (encoding the granulocyte/macrophage colony-stimulating factor [GM-CSF] receptor α-chain [CD116]), which results in reduced GM-CSF-dependent pulmonary surfactant clearance by alveolar macrophages. While no pharmacologic therapy currently exists for hPAP, it was recently demonstrated that endotracheal instillation of wild-type or gene-corrected mononuclear phagocytes (pulmonary macrophage transplantation [PMT]) results in a significant and durable therapeutic efficacy in a validated murine model of hPAP...
August 30, 2017: Human Gene Therapy Methods
https://www.readbyqxmd.com/read/28839101/hyperoxia-treatment-of-trek-1-trek-2-traak-deficient-mice-is-associated-with-a-reduction-in-surfactant-proteins
#9
Andreas Schwingshackl, Benjamin Lopez, Bin Teng, Charlean L Luellen, Florian Lesage, John Belperio, Riccardo Olcese, Christopher M Waters
We previously proposed a role for the 2-pore domain potassium (K2P) channel TREK-1 in hyperoxia (HO)-induced lung injury. To determine whether redundancy between the 3 TREK isoforms (TREK-1, TREK-2, TRAAK) could protect from HO-induced injury, we now examined the effect of deletion of all 3 TREK isoforms in a clinically relevant scenario of prolonged HO exposure and mechanical ventilation (MV). We exposed WT and TREK-1/TREK-2/TRAAK-deficient (triple ko) mice to either room air, 72 hours HO, MV (high and low tidal volume), or a combination of HO+MV, and measured quasi-static lung compliance, BAL protein concentration, histologic lung injury scores (LIS), cellular apoptosis, and cytokine levels...
August 24, 2017: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/28837561/histologic-and-biochemical-alterations-predict-pulmonary-mechanical-dysfunction-in-aging-mice-with-chronic-lung-inflammation
#10
Christopher B Massa, Angela M Groves, Smita U Jaggernauth, Debra L Laskin, Andrew J Gow
Both aging and chronic inflammation produce complex structural and biochemical alterations to the lung known to impact work of breathing. Mice deficient in surfactant protein D (Sftpd) develop progressive age-related lung pathology characterized by tissue destruction/remodeling, accumulation of foamy macrophages and alteration in surfactant composition. This study proposes to relate changes in tissue structure seen in normal aging and in chronic inflammation to altered lung mechanics using a computational model...
August 2017: PLoS Computational Biology
https://www.readbyqxmd.com/read/28725012/phycocyanin-attenuates-pulmonary-fibrosis-via-the-tlr2-myd88-nf-%C3%AE%C2%BAb-signaling-pathway
#11
Chengcheng Li, Yan Yu, Wenjun Li, Bo Liu, Xudong Jiao, Xinyu Song, Changjun Lv, Song Qin
Our aim was to investigate the effects of phycocyanin (PC) on bleomycin (BLM)-induced pulmonary fibrosis (PF). In this study, C57 BL/6 wild-type (WT) mice and toll-like receptor (TLR) 2 deficient mice were treated with PC for 28 days following BLM exposure. Serum and lung tissues were collected on days 3, 7 and 28. Data shows PC significantly decreased the levels of hydroxyproline (HYP), vimentin, surfactant-associated protein C (SP-C), fibroblast specific protein-1 (S100A4) and α-smooth muscle actin (α-SMA) but dramatically increased E-cadherin and podoplanin (PDPN) expression on day 28...
July 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28647590/differences-in-the-coronal-proteome-acquired-by-particles-depositing-in-the-lungs-of-asthmatic-versus-healthy-humans
#12
Abhinav Kumar, Elif Melis Bicer, Paul Pfeffer, Marco P Monopoli, Kenneth A Dawson, Jonny Eriksson, Katarina Edwards, Steven Lynham, Matthew Arno, Annelie F Behndig, Anders Blomberg, Graham Somers, Dave Hassall, Lea Ann Dailey, Ben Forbes, Ian Mudway
Most inhaled nanomedicines in development are for the treatment of lung disease, yet little is known about their interaction with the respiratory tract lining fluids (RTLFs). Here we combined the use of nano-silica, as a protein concentrator, with label-free snapshot proteomics (LC-MS/MS; key findings confirmed by ELISA) to generate a quantitative profile of the RTLF proteome and provided insight into the evolved corona; information that may be used in future to improve drug targeting to the lungs by inhaled medicines...
June 22, 2017: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/28592390/greywater-characterization-and-loadings-physicochemical-treatment-to-promote-onsite-reuse
#13
C Noutsopoulos, A Andreadakis, N Kouris, D Charchousi, P Mendrinou, A Galani, I Mantziaras, E Koumaki
Greywater is the wastewater produced in bathtubs, showers, hand basins, kitchen sinks, dishwashers and laundry machines. Segregation of greywater and blackwater and on site greywater treatment in order to promote its reuse for toilet flushing and/or garden irrigation is an interesting option especially in water deficient areas. The objective of this study was to characterize the different greywater sources in Greek households and to evaluate the performance of alternative physicochemical treatment systems to treat several types of greywater...
June 4, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28581337/featured-article-electroporation-mediated-gene-delivery-of-surfactant-protein-b-sp-b-restores-expression-and-improves-survival-in-mouse-model-of-sp-b-deficiency
#14
Rebecca C Barnett, Xin Lin, Michael Barravecchia, Rosemary A Norman, Karen L de Mesy Bentley, Fabeha Fazal, Jennifer L Young, David A Dean
Surfactant Protein B Deficiency is a rare but lethal monogenetic, congenital lung disease of the neonate that is unresponsive to any treatment except lung transplantation. Based on the potential that gene therapy offers to treat such intractable diseases, our objective was to test whether an electroporation-based gene delivery approach could restore surfactant protein B expression and improve survival in a compound knockout mouse model of surfactant protein B deficiency. Surfactant protein B expression can be shut off in these mice upon withdrawl of doxycycline, resulting in decreased levels of surfactant protein B within four days and death due to lung dysfunction within four to seven days...
July 2017: Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28540346/less-invasive-surfactant-administration-reduces-the-need-for-mechanical-ventilation-in-preterm-infants-a-meta-analysis
#15
Christine S M Lau, Ronald S Chamberlain, Shyan Sun
Neonatal respiratory distress syndrome due to surfactant deficiency is associated with high morbidity and mortality in preterm infants, and the use of less invasive surfactant administration (LISA) has been increasingly studied. This meta-analysis found that LISA via thin catheter significantly reduced the need for mechanical ventilation within the first 72 hours (relative risk [RR] = 0.677; P = .021), duration of mechanical ventilation (difference in means [MD] = -39.302 hours; P < .001), duration of supplemental oxygen (MD = -68...
2017: Global Pediatric Health
https://www.readbyqxmd.com/read/28532087/the-repairing-of-full-thickness-skin-deficiency-and-its-biological-mechanism-using-decellularized-human-amniotic-membrane-as-the-wound-dressing
#16
Mengsheng Song, Weiqing Wang, Qihua Ye, Shizhong Bu, Zhisen Shen, Yabin Zhu
Human amniotic membrane (HAM) was a biocompatible scaffold with advantages of anti-inflammatory, low antigen, feasibility, tolerance and low cost. In our previous work, HAM was treated to be decellularized using surfactant, lipase and DNAase methods and the efficacy as an implantable biological mesh was verified after decellularization treatment. In this work, we used the previous protocol to decellularize the fresh HAM, and applied it to repair full-thickness skin defects with Sprague-Dawley rats as the test animals...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28503550/design-of-surfactant-protein-b-peptide-mimics-based-on-the-saposin-fold-for-synthetic-lung-surfactants
#17
Frans J Walther, Larry M Gordon, Alan J Waring
Surfactant protein (SP)-B is a 79-residue polypeptide crucial for the biophysical and physiological function of endogenous lung surfactant. SP-B is a member of the Saposin or Saposin-like proteins (SAPLIP) family of proteins that share an overall three-dimensional folding pattern based on secondary structures and disulfide connectivity and exhibit a wide diversity of biological functions. Here we review the synthesis, molecular biophysics and activity of synthetic analogs of Saposin proteins designed to mimic those interactions of the parent proteins with lipids that enhance interfacial activity...
September 2016: Biomedicine Hub
https://www.readbyqxmd.com/read/28472244/surfactant-protein-d-deficiency-suppresses-systemic-inflammation-and-reduces-atherosclerosis-in-apoe-knockout-mice
#18
Yuki Hirano, Alex Choi, Masashi Tsuruta, Jen Erh Jaw, Yeni Oh, David Ngan, Konosuke Moritani, Yu-Wei Roy Chen, Sheena Tam, Yuexin Li, Dragos M Vasilescu, James C Hogg, Gordon Francis, Pascal Bernatchez, Shu-Fan Paul Man, Don D Sin
Aims: Although surfactant protein-D (SP-D) is a pneumoprotein that is predominantly synthesized by type II epithelial cells in the lung, individuals with increased circulating levels of SP-D are at an elevated risk of mortality from ischemic heart disease. Whether SP-D contributes directly to atherosclerosis is unknown. We determined the effects of SP-D gene deletion in a mouse model of atherosclerosis. Methods and results: SP-D knockout (KO) mice were crossed with hyperlipidemic and atherosclerosis-prone apolipoprotein E (ApoE) KO mice to generate SP-D/ApoE double knockout (DKO) mice...
August 1, 2017: Cardiovascular Research
https://www.readbyqxmd.com/read/28438206/exogenous-gene-transfer-of-rab-3-8-small-gtpase-ameliorates-aberrant-lung-surfactant-homeostasis-in-ruby-rats
#19
Kazuhiro Osanai, Keisuke Nakase, Takashi Sakuma, Kazuaki Nishiki, Masafumi Nojiri, Ryo Kato, Masatoshi Saito, Yuki Fujimoto, Shiro Mizuno, Hirohisa Toga
BACKGROUND: Rab(3)8 small GTPase regulates intracellular transport in melanocytes and alveolar type II epithelial cells. Ruby rats carrying Rab(3)8 and other gene mutations exhibit oculocutaneous albinism, bleeding diathesis, and hence, are a rat model of human Hermansky-Pudlak syndrome (HPS). We previously showed that Long Evans Cinnamon (LEC) rats, one strain of the Ruby rats, developed aberrant lung surfactant homeostasis with remarkably enlarged lamellar bodies in alveolar type II cells...
April 24, 2017: Respiratory Research
https://www.readbyqxmd.com/read/28416656/effect-of-cholesterol-on-the-molecular-structure-and-transitions-in-a-clinical-grade-lung-surfactant-extract
#20
Jenny Marie Andersson, Carl Grey, Marcus Larsson, Tiago Mendes Ferreira, Emma Sparr
The lipid-protein film covering the interface of the lung alveolar in mammals is vital for proper lung function and its deficiency is related to a range of diseases. Here we present a molecular-level characterization of a clinical-grade porcine lung surfactant extract using a multitechnique approach consisting of [Formula: see text]-[Formula: see text] solid-state nuclear magnetic spectroscopy, small- and wide-angle X-ray scattering, and mass spectrometry. The detailed characterization presented for reconstituted membranes of a lung extract demonstrates that the molecular structure of lung surfactant strongly depends on the concentration of cholesterol...
May 2, 2017: Proceedings of the National Academy of Sciences of the United States of America
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