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Asthma biomarker

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https://www.readbyqxmd.com/read/29781543/prospective-predictors-of-exacerbation-status-in-severe-asthma-over-a-3-year-follow-up
#1
Hirokazu Kimura, Satoshi Konno, Hironi Makita, Natsuko Taniguchi, Kaoruko Shimizu, Masaru Suzuki, Hiroki Kimura, Houman Goudarzi, Yuji Nakamaru, Junya Ono, Shoichiro Ohta, Kenji Izuhara, Yoichi M Ito, Sally E Wenzel, Masaharu Nishimura
BACKGROUND: A predisposition to exacerbations is being recognized as a distinct phenotype with "previous exacerbations" representing the strongest clinical factor associated with future exacerbation. Thus, to identify additional novel biomarkers associated with asthma exacerbations, "past exacerbation status" must be included as a confounding factor. OBJECTIVE: This study aimed to characterize the clinical and biomarker features associated with asthma exacerbations in severe asthma...
May 21, 2018: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29777230/serum-biomarkers-of-inflammation-and-adiposity-in-the-labs-cohort-associations-with-metabolic-disease-and-surgical-outcomes
#2
Robert W O'Rourke, Geoffrey S Johnson, Jonathan Q Purnell, Anita P Courcoulas, Gregory F Dakin, Luis Garcia, Marcelo Hinojosa, James E Mitchell, Alfons Pomp, Walter J Pories, Konstantinos Spaniolas, David R Flum, Abdus S Wahed, Bruce M Wolfe
BACKGROUND: The utility of serum biomarkers related to inflammation and adiposity as predictors of metabolic disease prevalence and outcomes after bariatric surgery are not well-defined. METHODS: Associations between pre- and post-operative serum levels of four biomarkers (C-reactive protein (CRP), cystatin C (CC), leptin, and ghrelin) with baseline measures of adiposity and metabolic disease prevalence (asthma, diabetes, sleep apnea), and weight loss and metabolic disease remission after bariatric surgery were studied in the Longitudinal Assessment of Bariatric Surgery (LABS) cohort...
May 17, 2018: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/29763900/c-prosp-b-a-possible-biomarker-for-pulmonary-diseases
#3
Nicolas Kahn, Anne-Kathrin Rossler, Katrin Hornemann, Thomas Muley, Ekkehard Grünig, Werner Schmidt, Felix J F Herth, Michael Kreuter
BACKGROUND: Detection of surfactant proteins A and D (SP-A and SP-D) in the serum of patients with pulmonary diseases is thought to reflect an injury of the alveolar epithelial barrier and as such serve as a biomarker for these diseases. However, the data for SP-B are limited. OBJECTIVES: The aim of this feasibility study was to assess whether immature SP-B pre-proteins might have value as a possible biomarker for pulmonary diseases. METHODS: In serum samples from patients with different chronic lung diseases (interstitial lung diseases [ILDs], chronic obstructive pulmonary disease, asthma, lung cancer, pulmonary hypertension, inflammation, patients on ventilator support; total n = 283), C-proSP-B was measured using an electrochemiluminescence immunoassay based on mouse monoclonal anti-C-proSP-B antibodies...
May 15, 2018: Respiration; International Review of Thoracic Diseases
https://www.readbyqxmd.com/read/29758106/sputum-to-serum-hydrogen-sulfide-ratio-as-a-novel-biomarker-of-predicting-future-risks-of-asthma-exacerbation
#4
Yasuhito Suzuki, Junpei Saito, Masami Kikuchi, Manabu Uematsu, Atsuro Fukuhara, Suguru Sato, Mitsuru Munakata
BACKGROUND: Increased level of hydrogen sulfide (H2 S) in sputum is reported to be a new biomarker of neutrophilic airway inflammation in chronic airway disorders. However, the relationship between H2 S and disease activity remains unclear. OBJECTIVE: We investigated whether H2 S levels could vary during different conditions in asthma. METHOD: H2 S levels in sputum and serum were measured using a sulfide-sensitive electrode in 47 stable asthmatic subjects (S-BA), 21 uncontrolled asthmatic subjects (UC-BA), 26 asthmatic subjects with acute exacerbation (AE-BA), and 15 healthy subjects...
May 14, 2018: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29757966/cnt-foam-embedded-micro-gas-preconcentrator-for-low-concentration-ethane-measurements
#5
Janghyeon Lee, Si-Hyung Lim
Breath analysis has become increasingly important as a noninvasive process for the clinical diagnosis of patients suffering from various diseases. Many commercial gas preconcentration instruments are already being used to overcome the detection limits of commercial gas sensors for gas concentrations which are as low as ~100 ppb in exhaled breath. However, commercial instruments are large and expensive, and they require high power consumption and intensive maintenance. In the proposed study, a micro gas preconcentrator (μ-PC) filled with a carbon nanotube (CNT) foam as an adsorbing material was designed and fabricated for the detection of low-concentration ethane, which is known to be one of the most important biomarkers related to chronic obstructive pulmonary disease (COPD) and asthma...
May 14, 2018: Sensors
https://www.readbyqxmd.com/read/29755573/thymus-and-activation-regulated-chemokine-tarc-ccl17-and-ige-are-associated-with-elderly-asthmatics
#6
Kyung Mi Jo, Hyo Kyung Lim, Jae Woong Sull, Eugene Choi, Ji-Sook Lee, Mee Ae Cheong, Min Hwa Hong, Yoori Kim, In Sik Kim
Background: The pathogenesis of asthma, which is an allergic lung disease, is associated with a variety of allergens such as house dust mite, pollen, and mould, IgE containing serum IgE and allergen-specific-IgE, and inflammatory cytokines including thymus and activation-regulated chemokine (TARC)/CCL17. Because aging is an essential factor in the pathogenesis of asthma, we examined biomarkers related to asthmatic subjects depending on age. Results: Physiological indices such as FEV1(forced expiratory capacity in 1 s), FEV1 (% predicted), and FEV1/FVC(forced vital capacity) (%) in asthmatic subjects were lower than those in normal subjects...
2018: Immunity & Ageing: I & A
https://www.readbyqxmd.com/read/29754974/implication-of-fraction-of-exhaled-nitric-oxide-and-blood-eosinophil-count-in-severe-asthma
#7
Tomoyuki Soma, Hidetoshi Iemura, Erika Naito, Sachiko Miyauchi, Yoshitaka Uchida, Kazuyuki Nakagome, Makoto Nagata
BACKGROUND: Severe asthma is a complex disease with heterogeneous features and involves type 2 airway inflammation, including eosinophil accumulation. Surrogate biomarkers, fraction of exhaled nitric oxide (FeNO) and blood eosinophil count (b-EOS), may predict eosinophilic airway inflammation. Here we investigated clinical characteristics of severe asthma phenotype using a combined analysis of FeNO and b-EOS. METHODS: This retrospective study examined clinical data of patients with severe asthma (N = 107; median age, 64 years) treated at Saitama Medical University Hospital from 2009 to 2016...
May 10, 2018: Allergology International: Official Journal of the Japanese Society of Allergology
https://www.readbyqxmd.com/read/29746003/ige-sensitisation-to-food-allergens-and-airborne-allergens-in-relation-to-biomarkers-of-type-2-inflammation-in-asthma
#8
A Patelis, K Alving, R Middelveld, A James, J Ono, S Ohta, K Izuhara, M P Borres, B Forsberg, C Janson, A Malinovschi
BACKGROUND: We have recently reported that sensitisation to food allergens and sensitisation to airborne allergens had independent associations with increased fraction of exhaled nitric oxide (FeNO) and blood eosinophils in middle-aged adults and in young subjects with asthma. OBJECTIVE: To investigate the relation between IgE sensitisation and several type 2 inflammation biomarkers in adult asthmatics. METHODS: FeNO, urinary eosinophil-derived neurotoxin (U-EDN), serum eosinophil cationic protein (S-ECP) and periostin were measured in 396 asthmatics, aged 17-76 years, from the Swedish GA2LEN study...
May 10, 2018: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29741411/biomarkers-for-severe-allergic-asthma-in-children-could-they-be-useful-to-guide-disease-control-and-use-of-omalizumab
#9
Flore Amat, André Labbé
Although symptom controls in asthmatic children can be achieved through compliant use of conventional medication, some children have uncontrolled severe persistent asthma, especially if they are allergic. For these children, omalizumab (approved by the EMA and FDA in children aged > 6 years) could be a therapeutic option. However, response to omalizumab varies from one child to another. Predictive biomarkers of omalizumab effectiveness could be useful to monitor response to treatment. Area covered: The authors searched in the PubMed database for publications related to the use of biomarkers in allergic asthma...
May 16, 2018: Expert Review of Respiratory Medicine
https://www.readbyqxmd.com/read/29730088/aspiration-pneumonia-and-related-syndromes
#10
REVIEW
Augustine S Lee, Jay H Ryu
Aspiration is a syndrome with variable respiratory manifestations that span acute, life-threatening illnesses, such as acute respiratory distress syndrome, to chronic, sometimes insidious, respiratory disorders such as aspiration bronchiolitis. Diagnostic testing is limited by the insensitivity of histologic testing, and although gastric biomarkers for aspiration are increasingly available, none have been clinically validated. The leading mechanism for microaspiration is thought to be gastroesophageal reflux disease, largely driven by the increased prevalence of gastroesophageal reflux across a variety of respiratory disorders, including chronic obstructive pulmonary disease, asthma, idiopathic pulmonary fibrosis, and chronic cough...
May 2, 2018: Mayo Clinic Proceedings
https://www.readbyqxmd.com/read/29729941/biologics-and-chronic-obstructive-pulmonary-diseases
#11
Ian D Pavord
The presence of airway inflammation in patients with chronic obstructive pulmonary disease (COPD) provides a rationale for biological agents targeting specific inflammatory pathways. This approach has been strikingly effective in patients with other chronic inflammatory diseases, such as rheumatoid arthritis, psoriasis, and asthma. However, there are important and unresolved challenges in COPD, including our incomplete understanding of heterogeneity of the lower airway inflammatory response and how these contribute to the clinical expression of disease...
May 3, 2018: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29728509/functional-and-immunoreactive-levels-of-igg4-correlate-with-clinical-responses-during-the-maintenance-phase-of-house-dust-mite-immunotherapy
#12
Mulin Feng, Qiujuan Su, Xuxin Lai, Mo Xian, Xu Shi, Peter Adler Wurtzen, Rundong Qin, Xiaohui Zeng, Jing Li
Allergen-specific immunotherapy for house dust mite allergy is effective, but there are no validated biomarkers reflecting or predicting the clinical efficacy. We aimed to investigate the relationship between clinical outcomes and functional responses of allergen-specific IgG4 (sIgG4) and specific IgE (sIgE) during Dermatophagoides pteronyssinus s.c. allergen immunotherapy (SCIT) in allergic rhinitis and/or asthma patients. Combined symptom medication scores (SMS), D. pteronyssinus -sIgG4 levels, D. pteronyssinus -sIgE levels, and the serum inhibitory capacity against D...
May 4, 2018: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29725983/liberty-asthma-quest-phase-3-randomized-double-blind-placebo-controlled-parallel-group-study-to-evaluate-dupilumab-efficacy-safety-in-patients-with-uncontrolled-moderate-to-severe-asthma
#13
William W Busse, Jorge F Maspero, Klaus F Rabe, Alberto Papi, Sally E Wenzel, Linda B Ford, Ian D Pavord, Bingzhi Zhang, Heribert Staudinger, Gianluca Pirozzi, Nikhil Amin, Bolanle Akinlade, Laurent Eckert, Jingdong Chao, Neil M H Graham, Ariel Teper
INTRODUCTION: Dupilumab, a fully human anti-IL-4Rα monoclonal antibody, inhibits signaling of both interleukin (IL)-4 and IL-13, which are key drivers of type 2-mediated inflammation. Dupilumab is approved in the EU, USA, and other countries for the treatment of adults with inadequately controlled moderate-to-severe atopic dermatitis. Following positive phase 2 results in asthma, the phase 3 Liberty Asthma QUEST trial was initiated to provide further evidence for dupilumab efficacy and safety in patients with uncontrolled, moderate-to-severe asthma...
May 3, 2018: Advances in Therapy
https://www.readbyqxmd.com/read/29722838/vitamin-a-and-d-intake-in-pregnancy-infant-supplementation-and-asthma-development-the-norwegian-mother-and-child-cohort
#14
Christine L Parr, Maria C Magnus, Øystein Karlstad, Kristin Holvik, Nicolai A Lund-Blix, Margareta Haugen, Christian M Page, Per Nafstad, Per M Ueland, Stephanie J London, Siri E Håberg, Wenche Nystad
Background: Western diets may provide excess vitamin A, which is potentially toxic and could adversely affect respiratory health and counteract benefits from vitamin D. Objective: The aim of this study was to examine child asthma at age 7 y in relation to maternal intake of vitamins A and D during pregnancy, infant supplementation with these vitamins, and their potential interaction. Design: We studied 61,676 school-age children (born during 2002-2007) from the Norwegian Mother and Child Cohort with data on maternal total (food and supplement) nutrient intake in pregnancy (food-frequency questionnaire validated against biomarkers) and infant supplement use at age 6 mo (n = 54,142 children)...
May 1, 2018: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/29720305/on-line-breath-metabolomics-in-respiratory-diseases-using-secondary-electrospray-ionization-mass-spectrometry
#15
Martin Thomas Gaugg
Every second we are exhaling hundreds of endogenous and exogenous compounds that originate from blood and lung tissue. Obtaining metabolic information via exhaled breath analysis has been an emerging topic since the 1970s. Secondary electrospray ionization-mass spectrometry is a relatively new technique to detect these metabolites on-line in a highly sensitive and specific fashion. Using this technique, several respiratory diseases, including chronic obstructive pulmonary disease, obstructive sleep apnea, idiopathic pulmonary fibrosis, asthma, and lung cancer have been investigated over the past years...
April 25, 2018: Chimia
https://www.readbyqxmd.com/read/29718738/treatment-of-severe-uncontrolled-eosinophilic-asthma-where-we-are-heading
#16
Jonathan A Bernstein, Reynold Panettieri
OBJECTIVE: We sought to highlight how our understanding of the pathophysiology of severe asthma has evolved over time and discuss the role of biomarkers in treatment advances and emerging new therapies. DATA SOURCES: Nonsystematic PubMed literature search. STUDY SELECTION: Articles were selected based on areas of relevance to the classification of asthma by endotype, with an emphasis on the evolution of current treatment guidelines for severe asthma...
May 2, 2018: Journal of Asthma: Official Journal of the Association for the Care of Asthma
https://www.readbyqxmd.com/read/29714636/extracellular-vesicles-released-in-response-to-respiratory-exposures-implications-for-chronic-disease
#17
Birke J Benedikter, Emiel F M Wouters, Paul H M Savelkoul, Gernot G U Rohde, Frank R M Stassen
Extracellular vesicles (EV) are secreted signaling entities that enhance various pathological processes when released in response to cellular stresses. Respiratory exposures such as cigarette smoke and air pollution exert cellular stresses and are associated with an increased risk of several chronic diseases. The aim of this review was to examine the evidence that modifications in EV contribute to respiratory exposure-associated diseases. Publications were searched using PubMed and Google Scholar with the search terms (cigarette smoke OR tobacco smoke OR air pollution OR particulate matter) AND (extracellular vesicles OR exosomes OR microvesicles OR microparticles OR ectosomes)...
May 1, 2018: Journal of Toxicology and Environmental Health. Part B, Critical Reviews
https://www.readbyqxmd.com/read/29705381/high-dimensional-immune-biomarkers-demonstrate-differences-in-phenotypes-and-endotypes-in-food-allergy-and-asthma
#18
R Sharon Chinthrajah, Natasha Purington, Vanitha Sampath, Sandra Andorf, Monali Manohar, Mary Prunicki, Xiaoying Zhou, Dana Tupa, Kari C Nadeau
No abstract text is available yet for this article.
April 26, 2018: Annals of Allergy, Asthma & Immunology
https://www.readbyqxmd.com/read/29692617/both-fractional-exhaled-nitric-oxide-and-sputum-eosinophil-were-associated-with-uncontrolled-asthma
#19
Jie Gao, Zhaocheng Chen, Xiang Jie, Ruihua Ye, Feng Wu
Background: Sputum eosinophil and fractional exhaled nitric oxide (FeNO), noninvasive biomarkers of local eosinophilic airway inflammation, can be used to assess asthma outcome. Nevertheless, the clinical application of the association between FeNO and sputum eosinophil is controversial. The aim of the study was to investigate the predictive relationship between FeNO and sputum eosinophil in uncontrolled asthmatic patients and the correlation between sputum eosinophil and FeNO in bronchial reversibility and bronchial hyperresponsiveness (BHR)...
2018: Journal of Asthma and Allergy
https://www.readbyqxmd.com/read/29679407/longitudinal-urinary-metabolomic-profiling-reveals-metabolites-for-asthma-development-in-early-childhood
#20
Chih-Yung Chiu, Gigin Lin, Mei-Ling Cheng, Meng-Han Chiang, Ming-Han Tsai, Kuan-Wen Su, Man-Chin Hua, Sui-Ling Liao, Shen-Hao Lai, Tsung-Chieh Yao, Kuo-Wei Yeh, Jing-Long Huang
BACKGROUND: Several metabolites and altered metabolic pathways have been reported to be associated with asthma. However, longitudinal analysis of the dynamics of metabolites contributing to the development of asthma has not yet been fully clarified. METHODS: We sought to identify the metabolic mechanisms underlying asthma development in early childhood. Thirty children with asthma and paired healthy controls from a prospective birth cohort were enrolled. Time-series analysis of urinary metabolites collected at ages 1, 2, 3, and 4 years were assessed using 1 H-nuclear magnetic resonance (NMR) spectroscopy coupled with partial least-squares discriminant analysis (PLS-DA)...
April 21, 2018: Pediatric Allergy and Immunology
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