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https://www.readbyqxmd.com/read/29191953/surfactant-protein-d-is-a-causal-risk-factor-for-copd-results-of-mendelian-randomisation
#1
Ma'en Obeidat, Xuan Li, Stephen Burgess, Guohai Zhou, Nick Fishbane, Nadia N Hansel, Yohan Bossé, Philippe Joubert, Ke Hao, David C Nickle, Maarten van den Berge, Wim Timens, Michael H Cho, Brian D Hobbs, Kim de Jong, Marike Boezen, Rayjean J Hung, Nicholas Rafaels, Rasika Mathias, Ingo Ruczinski, Terri H Beaty, Kathleen C Barnes, Peter D Paré, Don D Sin
Surfactant protein D (SP-D) is produced primarily in the lung and is involved in regulating pulmonary surfactants, lipid homeostasis and innate immunity. Circulating SP-D levels in blood are associated with chronic obstructive pulmonary disease (COPD), although causality remains elusive.In 4061 subjects with COPD, we identified genetic variants associated with serum SP-D levels. We then determined whether these variants affected lung tissue gene expression in 1037 individuals. A Mendelian randomisation framework was then applied, whereby serum SP-D-associated variants were tested for association with COPD risk in 11 157 cases and 36 699 controls and with 11 years decline of lung function in the 4061 individuals...
November 2017: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
https://www.readbyqxmd.com/read/29168349/bioactive-pimarane-diterpenes-from-the-arctic-fungus-eutypella-sp-d-1
#2
Xiaoli Wang, Kunlai Sun, Bin Wang
Two new pimarane diterpenes, libertellenone M (1) and libertellenone N (2), together with five known compounds were isolated from the culture extract of Eutypella sp. D-1 derived from high-latitude soil of the Arctic. The structures of these compounds were determined by spectroscopic data as well as experimental and calculated electronic circular dichroism (ECD) analysis. Antimicrobial and cytotoxic activities of the isolated compounds were evaluated. Compound 3 exhibited weak antibacterial activity against Escherichia coli, Bacillus subtilis, and Vibrio vulnificus, each with MIC values of 16 μg/mL...
November 23, 2017: Chemistry & Biodiversity
https://www.readbyqxmd.com/read/29164837/serum-surfactant-protein-d-and-exhaled-nitric-oxide-as-biomarkers-of-early-lung-damage-in-systemic-sclerosis
#3
Alida Benfante, Riccardo Messina, Alessandra Paternò, Nicola Scichilone
BACKGROUND: Interstitial lung disease (ILD) complicates the course of systemic sclerosis (SSc), representing the main cause of death in these patients. The identification of parameters that can predict the early onset and progression of ILD in SSc represents an unmet need in clinical practice. The study was designed to explore whether the surfactant proteins (SP) A and D may be used as noninvasive tools for the early identification of ILD in SSc. Alveolar exhaled nitric oxide (NO) was investigated as a surrogate marker of distal inflammation...
November 21, 2017: Minerva Medica
https://www.readbyqxmd.com/read/29155458/localization-of-surfactant-protein-d-in-the-rheumatoid-synovial-membrane
#4
Anne Friesgaard Christensen, Grith Lykke Sorensen, Kirsten Junker, Peter Hvidbak Revald, Claus Varnum, Flemming Brandt Sorensen, Peter Junker
Surfactant protein-D (SP-D) is a collectin, which plays an important role in airway protection and inflammation. The molecule has both pro- and anti-inflammatory capacities depending on its molecular size. Its involvement in joint diseases is largely unknown and the aim of this investigation was to study SP-D occurrence and distribution in the synovial membrane of patients with long-standing rheumatoid arthritis (RA) and osteoarthritis (OA). Six RA patients and six OA patients, who underwent total hip arthroplasty, were included in the study...
November 20, 2017: APMIS: Acta Pathologica, Microbiologica, et Immunologica Scandinavica
https://www.readbyqxmd.com/read/29149883/serum-concentrations-of-krebs-von-den-lungen-6-surfactant-protein-d-and-matrix-metalloproteinase-2-as-diagnostic-biomarkers-in-patients-with-asbestosis-and-silicosis-a-case-control-study
#5
Changjiang Xue, Na Wu, Xue Li, Meihua Qiu, Xuqin Du, Qiao Ye
BACKGROUND: Asbestosis and silicosis are progressive pneumoconioses characterized by interstitial fibrosis following exposure to asbestos or silica dust. We evaluated the potential diagnostic biomarkers for these diseases. METHODS: The serum concentrations of Krebs von den Lungen-6 (KL-6), surfactant protein D (SP-D), and matrix metalloproteinase-2 (MMP-2), MMP-7, and MMP-9 were measured in 43 patients with asbestosis, 45 patients with silicosis, 40 dust-exposed workers (DEWs) without pneumoconiosis, and 45 healthy controls (HCs)...
November 17, 2017: BMC Pulmonary Medicine
https://www.readbyqxmd.com/read/29118857/analysis-of-predictive-parameters-for-the-development-of-radiation-induced-pneumonitis
#6
Toru Yamagishi, Norio Kodaka, Yoshiyuki Kurose, Kayo Watanabe, Chihiro Nakano, Kumiko Kishimoto, Takeshi Oshio, Kumiko Niitsuma, Hiroto Matsuse
INTRODUCTION: Prevention and effective treatment of radiation-induced pneumonitis (RP) could facilitate greater use of radiation therapy (RT) for lung cancer. The purpose of this study was to determine clinical parameters useful for early prediction of RP. METHODS: Blood sampling, pulmonary function testing, chest computed tomography, and bronchoalveolar lavage (BAL) were performed in patients with pathologically confirmed lung cancer who had completed ≥60 Gy of RT, at baseline, shortly after RT, and at 1 month posttreatment...
October 2017: Annals of Thoracic Medicine
https://www.readbyqxmd.com/read/29107869/surfactant-protein-d-regulates-caspase-8-mediated-cascade-of-the-intrinsic-pathway-of-apoptosis-while-promoting-bleb-formation
#7
Pascal Djiadeu, Nicole Farmakovski, Dhia Azzouz, Lakshmi P Kotra, Neil Sweezey, Nades Palaniyar
Surfactant-associated protein D (SP-D) is a soluble innate immune collectin present on many mucosal surfaces. We recently showed that SP-D suppresses the extrinsic pathway of apoptosis by downregulating caspase-8 activation. However, the effects of SP-D on the intrinsic pathway of apoptosis are not clearly understood. In the intrinsic pathway, cytochrome c is released by mitochondria into the cytoplasm. Oxidation of cytochrome c by cytochrome c oxidase activates the apoptosome and caspase-9 cascade. Both caspase-8- and caspase-9-mediated branches are activated in the intrinsic pathway of apoptosis; however, little is known about the relevance of the caspase-8 pathway in this context...
November 3, 2017: Molecular Immunology
https://www.readbyqxmd.com/read/29101035/surfactant-protein-d-attenuates-nitric-oxide-stimulated-apoptosis-in-rat-chondrocyte-by-suppressing-p38-mapk-signaling
#8
Yan Zhou, Jianghua Ming, Yaming Li, Xianjin Du, Ming Deng, Bin He, Jianlin Zhou, Guirong Wang, Shiqing Liu
Innate immune molecule surfactant protein D (SP-D), a member of the C-type lectin protein family, plays an indispensable role in host defense and the regulation of inflammation in the lung and other tissues. Osteoarthritis (OA) is a degenerative disease of cartilage, with inflammation that causes pathologic changes and tissue damage. However, it is unknown whether there exist SP-D expression and its potential role in the pathogenesis of OA. In this study, we examined SP-D expression and explored its biological function in a sodium nitroprusside (SNP)-stimulated rat chondrocytes and surgically-induced rat OA model...
October 31, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29091134/increased-peripheral-blood-tcd4-counts-and-serum-sp-d-levels-in-patients-with-chronic-paracoccidioidomycosis-during-and-after-antifungal-therapy
#9
James Venturini, Ricardo Souza Cavalcante, Tatiane Fernanda Sylvestre, Rodolfo Ferreira Dos Santos, Daniela Vanessa Moris, Lídia Raquel Carvalho, Maria Sueli Parreira de Arruda, Marjorie de Assis Golim, Rinaldo Poncio Mendes
BACKGROUND: The main clinical forms of paracoccidioidomycosis (PCM) are the acute/subacute form (AF) and the chronic form (CF), and they both display considerable clinical variability. The immune responses of PCM patients, during and after treatment, remain neglected, mainly in the case of CF patients, due to the high prevalence of pulmonary sequelae. OBJECTIVE: To evaluate the distribution of whole blood T cell subsets, serum cytokines, and biomarkers of pulmonary fibrosis in PCM patients, according to the clinical form and at different time points, during the antifungal therapy...
November 2017: Memórias do Instituto Oswaldo Cruz
https://www.readbyqxmd.com/read/29071557/collectins-in-urinary-tract-and-kidney-diseases
#10
REVIEW
Yongfang Qin, Jingjing Liu, Jiao Liu, Fengqi Hu
The innate immune system serves as the frontline defense against invading pathogens and initiates an inflammatory response to microorganisms. Collectins are C-type lectins that are structurally characterized by a collagen-like sequence and a carbohydrate recognition domain. Moreover, they are widely expressed throughout the body and are involved in the innate immunity against a variety of pathogens, regulating inflammation, and protecting the lungs from pathogens. Recently, two classical collectins, surfactant protein A (SP-A) and surfactant protein D (SP-D), as well as novel collectin 11, were found present in urinary tract tissues...
October 25, 2017: International Urology and Nephrology
https://www.readbyqxmd.com/read/29065861/clinical-effects-of-direct-hemoperfusion-using-a-polymyxin-b-immobilized-fiber-column-in-clinically-amyopathic-dermatomyositis-associated-rapidly-progressive-interstitial-pneumonias
#11
Hiroko Okabayashi, Hidenori Ichiyasu, Sayuri Hirooka, Kimitaka Akaike, Keisuke Kojima, Takayuki Jodai, Yasumiko Sakamoto, Hideharu Ideguchi, Shohei Hamada, Chieko Yoshida, Susumu Hirosako, Shinichiro Okamoto, Hirotsugu Kohrogi
BACKGROUND: Rapidly progressive interstitial pneumonias (RPIPs) associated with clinically amyopathic dermatomyositis (CADM) are highly resistant to therapy and have a poor prognosis. Multimodal therapies, including direct hemoperfusion using a polymyxin B-immobilized fiber column (PMX-DHP), have a protective effect on RPIPs. We evaluated the effects of PMX-DHP on CADM-associated RPIPs. METHODS: We retrospectively enrolled 14 patients with CADM-associated RPIPs and acute respiratory failure treated with PMX-DHP, corticosteroids, and immunosuppressive agents...
October 24, 2017: BMC Pulmonary Medicine
https://www.readbyqxmd.com/read/29025303/serum-surfactant-protein-d-as-a-marker-for-bronchopulmonary-dysplasia
#12
Suja Vinod, Andrew Gow, Barry Weinberger, Debra Potak, Mark Hiatt, Shaku Chandra, Thomas Hegyi
BACKGROUND: Lung epithelial cells express surfactant protein D (SP-D), a calcium-dependent lectin that plays an important role in antibody-independent pulmonary host defense. Previous studies have shown that it is found in the peripheral circulation in patients with pulmonary disease, likely because of translocation into the blood when lung epithelial barriers are disrupted by inflammation or acute injury. In adults, serum SP-D levels are biomarkers for the progression and severity of chronic lung disease...
October 26, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/29021828/endurance-exercise-training-decreased-serum-levels-of-surfactant-protein-d-and-improved-aerobic-fitness-of-obese-women-with-type-2-diabetes
#13
Sajjad Rezaei, Mahdieh Molanouri Shamsi, Mehdi Mahdavi, Azadeh Jamali, Jonato Prestes, Ramires Alsamir Tibana, James Wilfred Navalta, Fabrício Azevedo Voltarelli
BACKGROUND: Surfactant protein D (SP-D) is a member of the collectin family and is an important component of the pulmonary innate host defense. To find the relationship between exercise training and SP-D in diabetes, we examined the possible effects of a 10-week endurance exercise-training program on serum levels of SP-D, leptin, lipid profile and insulin resistance in obese women with type-2 diabetes mellitus (T2DM). METHODS: Twenty-two obese women with T2DM were randomly assigned to either exercise training (ET) or control (C) group...
2017: Diabetology & Metabolic Syndrome
https://www.readbyqxmd.com/read/28986143/validation-of-calcaneus-trabecular-microstructure-measurements-by-hr-pqct
#14
Louis M Metcalf, Enrico Dall'Ara, Margaret A Paggiosi, John R Rochester, Nicolas Vilayphiou, Graham J Kemp, Eugene V McCloskey
OBJECTIVE: Assessment of calcaneus microstructure using high-resolution peripheral quantitative computed tomography (HR-pQCT) might be used to improve fracture risk predictions or to assess responses to pharmacological and physical interventions. To develop a standard clinical protocol for the calcaneus, we validated calcaneus trabecular microstructure measured by HR-pQCT against 'gold-standard' micro-CT measurements. METHODS: Ten human cadaveric feet were scanned in situ using HR-pQCT (isotropic 82μm voxel size) at 100, 150 and 200ms integration times, and at 100ms integration time following removal of the calcaneus from the foot (ex vivo)...
October 3, 2017: Bone
https://www.readbyqxmd.com/read/28972165/surfactant-protein-a-down-regulates-epidermal-growth-factor-receptor-by-mechanisms-different-from-those-of-surfactant-protein-d
#15
Yoshihiro Hasegawa, Motoko Takahashi, Shigeru Ariki, Atsushi Saito, Yasuaki Uehara, Rina Takamiya, Koji Kuronuma, Hirofumi Chiba, Yuji Sakuma, Hiroki Takahashi, Yoshio Kuroki
We recently reported that the lectin surfactant protein D (SP-D) suppresses epidermal growth factor receptor (EGFR) signaling by interfering with ligand binding to EGFR through an interaction between the carbohydrate-recognition domain (CRD) of SP-D and N-glycans of EGFR. Here, we report that surfactant protein A (SP-A) also suppresses EGF signaling in A549 human lung adenocarcinoma cells and in CHOK1 cells stably expressing human EGFR and that SP-A inhibits the proliferation and motility of the A549 cells...
November 10, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28967518/gymnocranius-obesus-a-new-large-eye-seabream-from-the-coral-triangle
#16
Wei-Jen Chen, Ryohei Miki, Philippe Borsa
Two previously recorded new species of the large-eye seabream genus Gymnocranius (Gymnocranius sp. D and Gymnocranius sp. E) remain undescribed. Here we describe Gymnocranius sp. E as Gymnocranius obesus sp. nov. This new species is morphologically distinct from all other known species under Gymnocranius by the following combination of characters: relatively deep body, with ratio of standard length to body depth 2.2-2.4; protruding large eye, with eye diameter about equal to or slightly larger than inter-orbital width; caudal fin moderately forked; no blue spots or wavy blue lines on cheek and snout in adults; fourth transversal dark bar on flank running from the sixth spine of the dorsal fin to the origin of the anal fin; anal, caudal and dorsal fins drab with yellowish to yellow margins...
September 26, 2017: Comptes Rendus Biologies
https://www.readbyqxmd.com/read/28960651/surfactant-protein-d-multimerization-and-gene-polymorphism-in-copd-and-asthma
#17
Dalia Fakih, Zeina Akiki, Kirsten Junker, Myrna Medlej-Hashim, Mirna Waked, Pascale Salameh, Uffe Holmskov, Hasnaa Bouharoun-Tayoun, Soulaima Chamat, Grith L Sorensen, Rania Jounblat
BACKGROUND AND OBJECTIVE: A structural single nucleotide polymorphism rs721917 in the surfactant protein D (SP-D) gene, known as Met11Thr, was reported to influence the circulating levels and degree of multimerization of SP-D and was associated with both COPD and atopy in asthma. Moreover, disease-related processes are known to degrade multimerized SP-D, however, the degree of the protein degradation in these diseases is not clarified. We aimed to determine the distribution of multimerized (high molecular weight (HMW)) and non-multimerized (low molecular weight (LMW)) species of serum SP-D and their correlation with genetic polymorphisms and presence of disease in Lebanese COPD and asthmatic patients...
September 28, 2017: Respirology: Official Journal of the Asian Pacific Society of Respirology
https://www.readbyqxmd.com/read/28947028/serum-surfactant-protein-d-predicts-the-outcome-of-patients-with-idiopathic-pulmonary-fibrosis-treated-with-pirfenidone
#18
Kimiyuki Ikeda, Masanori Shiratori, Hirofumi Chiba, Hirotaka Nishikiori, Keiki Yokoo, Atsushi Saito, Yoshihiro Hasegawa, Koji Kuronuma, Mitsuo Otsuka, Gen Yamada, Hiroki Takahashi
BACKGROUND: Idiopathic pulmonary fibrosis (IPF) is a fatal pulmonary disease with poor prognosis. Pirfenidone, the first antifibrotic drug, suppresses the decline in forced vital capacity (FVC) and improves prognosis in some, but not all, patients with IPF; therefore, an indicator for identifying improved outcomes in pirfenidone therapy is desirable. This study aims to clarify whether baseline parameters can be predictors of disease progression and prognosis in patients with IPF treated with pirfenidone...
October 2017: Respiratory Medicine
https://www.readbyqxmd.com/read/28945872/serum-surfactant-protein-d-as-a-biomarker-for-measuring-lung-involvement-in-obese-patients-with-type-2-diabetes
#19
Carolina López-Cano, Albert Lecube, Marta García-Ramírez, Xavier Muñoz, Enric Sánchez, Asunción Seminario, Marta Hernández, Andreea Ciudin, Liliana Gutiérrez, Cristina Hernández, Rafael Simó
Context: Lung impairment is a new target for late diabetic complications. Biomarkers that could help identify patients requiring functional respiratory tests have not been reported. Objective: Our aim was to examine whether serum surfactant protein D (SP-D) and A (SP-A) could be useful biomarkers of lung damage in obese patients with type 2 diabetes (T2D) without known lung disease. Design and Setting: A case-control study conducted in an ambulatory obesity unit...
November 1, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28943927/measurement-of-exhaled-nitric-oxide-and-serum-surfactant-protein-d-levels-for-monitoring-radiation-pneumonitis-following-thoracic-radiotherapy
#20
Hideya Yamazaki, Norihiro Aibe, Satoaki Nakamura, Naomi Sasaki, Gen Suzuki, Ken Yoshida, Kei Yamada, Masahiko Koizumi, Taichiro Arimoto, Yoshinobu Iwasaki, Yoshiko Kaneko, Koichi Takayama
The present study aimed to examine the role of exhaled nitric oxide (eNO) and serum surfactant protein D (SP-D) level in the determination of radiation pneumonitis (RP) after thoracic radiotherapy (RT). The study included 34 treatments for 33 patients, including 16 three-dimensional conformal and 18 stereotactic body RT treatments. eNO levels were measured prior to RT, immediately subsequent to RT, every week during the RT course and at 1, 3, 6, 9 and 12 months following the treatment. The therapy reduced the eNO from 24...
October 2017: Oncology Letters
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