keyword
MENU ▼
Read by QxMD icon Read
search

Asthma cluster analysis

keyword
https://www.readbyqxmd.com/read/28179442/t-helper-cell-type-2-th2-and-non-th2-molecular-phenotypes-of-asthma-using-sputum-transcriptomics-in-u-biopred
#1
Chih-Hsi Scott Kuo, Stelios Pavlidis, Matthew Loza, Fred Baribaud, Anthony Rowe, Iaonnis Pandis, Ana Sousa, Julie Corfield, Ratko Djukanovic, Rene Lutter, Peter J Sterk, Charles Auffray, Yike Guo, Ian M Adcock, Kian Fan Chung
Asthma is characterised by heterogeneous clinical phenotypes. Our objective was to determine molecular phenotypes of asthma by analysing sputum cell transcriptomics from 104 moderate-to-severe asthmatic subjects and 16 nonasthmatic subjects.After filtering on the differentially expressed genes between eosinophil- and noneosinophil-associated sputum inflammation, we used unbiased hierarchical clustering on 508 differentially expressed genes and gene set variation analysis of specific gene sets.We defined three transcriptome-associated clusters (TACs): TAC1 (characterised by immune receptors IL33R, CCR3 and TSLPR), TAC2 (characterised by interferon-, tumour necrosis factor-α- and inflammasome-associated genes) and TAC3 (characterised by genes of metabolic pathways, ubiquitination and mitochondrial function)...
February 2017: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
https://www.readbyqxmd.com/read/28143694/quantitative-computed-tomography-imaging-based-clustering-differentiates-asthmatic-subgroups-with-distinctive-clinical-phenotypes
#2
Sanghun Choi, Eric A Hoffman, Sally E Wenzel, Mario Castro, Sean Fain, Nizar Jarjour, Mark L Schiebler, Kun Chen, Ching-Long Lin
BACKGROUND: Imaging variables including airway diameter, wall thickness and air-trapping have been found to be important metrics when differentiating severe asthmatics from nonsevere asthmatics and healthy subjects. OBJECTIVE: The objective of this study was to identify imaging-based clusters and to explore the association of the clusters with existing clinical metrics. METHODS: We performed an imaging-based cluster analysis using quantitative computed tomography-based structural and functional variables extracted from the respective inspiration and expiration scans of 248 asthmatics...
January 28, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28140482/phenotypical-characterization-of-peanut-allergic-children-with-differences-in-cross-allergy-to-tree-nuts-and-other-legumes
#3
Mathias Cousin, Stéphane Verdun, Maxime Seynave, Anne-Christine Vilain, Amélie Lansiaux, Anne Decoster, Christine Sauvage
BACKGROUND: Peanut allergy in children is often associated with allergies to tree nuts and/or legumes. The aim of the present study was to analyze in cluster a cohort of children allergic to peanuts and assessed for cross-reactivity to nuts and legumes and to identify different phenotypes. METHODS: We included retrospectively 317 children with peanut allergy evaluated at the Allergy Unit of the Saint Vincent Hospital of Lille in the last 12 years. A complete work-up for peanut allergy and nuts and legumes was carried out for each patient...
January 31, 2017: Pediatric Allergy and Immunology
https://www.readbyqxmd.com/read/28125150/phenotypes-of-asthma-in-low-income-children-and-adolescents-cluster-analysis
#4
Anna Lucia Barros Cabral, Andrey Wirgues Sousa, Felipe Augusto Rodrigues Mendes, Celso Ricardo Fernandes de Carvalho
Objective: Studies characterizing asthma phenotypes have predominantly included adults or have involved children and adolescents in developed countries. Therefore, their applicability in other populations, such as those of developing countries, remains indeterminate. Our objective was to determine how low-income children and adolescents with asthma in Brazil are distributed across a cluster analysis. Methods: We included 306 children and adolescents (6-18 years of age) with a clinical diagnosis of asthma and under medical treatment for at least one year of follow-up...
January 23, 2017: Jornal Brasileiro de Pneumologia: Publicaça̋o Oficial da Sociedade Brasileira de Pneumologia e Tisilogia
https://www.readbyqxmd.com/read/28116096/an-inhaled-dose-of-budesonide-induces-genes-involved-in-transcription-and-signaling-in-the-human-airways-enhancement-of-anti-and-proinflammatory-effector-genes
#5
Richard Leigh, Mahmoud M Mostafa, Elizabeth M King, Christopher F Rider, Suharsh Shah, Curtis Dumonceaux, Suzanne L Traves, Andrew McWhae, Tyler Kolisnik, Cora Kooi, Donna M Slater, Margaret M Kelly, Mark Bieda, Anna Miller-Larsson, Robert Newton
Although inhaled glucocorticoids, or corticosteroids (ICS), are generally effective in asthma, understanding their anti-inflammatory actions in vivo remains incomplete. To characterize glucocorticoid-induced modulation of gene expression in the human airways, we performed a randomized placebo-controlled crossover study in healthy male volunteers. Six hours after placebo or budesonide inhalation, whole blood, bronchial brushings, and endobronchial biopsies were collected. Microarray analysis of biopsy RNA, using stringent (≥2-fold, 5% false discovery rate) or less stringent (≥1...
August 2016: Pharmacology Research & Perspectives
https://www.readbyqxmd.com/read/28110382/economic-evaluations-alongside-efficient-study-designs-using-large-observational-datasets-the-pleasant-trial-case-study
#6
Matthew Franklin, Sarah Davis, Michelle Horspool, Wei Sun Kua, Steven Julious
BACKGROUND: Large observational datasets such as Clinical Practice Research Datalink (CPRD) provide opportunities to conduct clinical studies and economic evaluations with efficient designs. OBJECTIVES: Our objectives were to report the economic evaluation methodology for a cluster randomised controlled trial (RCT) of a UK NHS-delivered public health intervention for children with asthma that was evaluated using CPRD and describe the impact of this methodology on results...
January 21, 2017: PharmacoEconomics
https://www.readbyqxmd.com/read/28049188/association-of-polysensitization-allergic-multimorbidity-and-allergy-severity-a-cross-sectional-study-of-school-children
#7
Eun Kyo Ha, Ji Hyeon Baek, So-Yeon Lee, Yong Mean Park, Woo Kyung Kim, Youn Ho Sheen, Seung Jin Lee, Youngoh Bae, Jihyeon Kim, Kee-Jae Lee, Kangmo Ahn, Ho-Jang Kwon, Man Yong Han
BACKGROUND: Aeroallergen sensitization is related to the coexistence of allergic diseases, but the nature of this relationship is poorly understood. The aim of this study was to clarify the relationship of polysensitization with allergic multimorbidities and the severity of allergic diseases. METHODS: This study is a cross-sectional analysis of 3,368 Korean children aged 6-7 years-old. We defined IgE-mediated allergic diseases based on structured questionnaires, and classified the sensitivity to 18 aeroallergens by logistic regression and the Ward hierarchical clustering method...
2016: International Archives of Allergy and Immunology
https://www.readbyqxmd.com/read/28049124/personalised-medicine-in-asthma-from-curative-to-preventive-medicine
#8
REVIEW
Laurent Guilleminault, Hakima Ouksel, Chantal Belleguic, Yannick Le Guen, Patrick Germaud, Emilie Desfleurs, Christophe Leroyer, Antoine Magnan
The concept of asthma has changed substantially in recent years. Asthma is now recognised as a heterogeneous entity that is complex to treat. The subdivision of asthma, provided by "cluster" analyses, has revealed various groups of asthma patients who share phenotypic features. These phenotypes underlie the need for personalised asthma therapy because, in contrast to the previous approach, treatment must be tailored to the individual patient. Determination of the patient's asthma phenotype is therefore essential but sometimes challenging, particularly in elderly patients with a multitude of comorbidities and a complex exposure history...
January 2017: European Respiratory Review: An Official Journal of the European Respiratory Society
https://www.readbyqxmd.com/read/28011367/biomarkers-associated-with-disease-severity-in-allergic-and-nonallergic-asthma
#9
Selene Baos, David Calzada, Lucía Cremades, Joaquín Sastre, Joaquín Quiralte, Fernando Florido, Carlos Lahoz, Blanca Cárdaba
Asthma is a complex, chronic respiratory disease with a wide clinical spectrum. Use of high-throughput technologies has generated a great deal of data that require validation. In this work the objective was to validate molecular biomarkers related to asthmatic disease types in peripheral blood samples and define their relationship with disease severity. With this purpose, ninety-four previously described genes were analyzed by qRT-PCR in 30 healthy control (HC) subjects, 30 patients with nonallergic asthma (NA), 30 with allergic asthma (AA), and 14 patients with allergy (rhinitis) but without asthma (AR)...
February 2017: Molecular Immunology
https://www.readbyqxmd.com/read/28005003/pleasant-preventing-and-lessening-exacerbations-of-asthma-in-school-age-children-associated-with-a-new-term-a-cluster-randomised-controlled-trial-and-economic-evaluation
#10
Steven A Julious, Michelle J Horspool, Sarah Davis, Mike Bradburn, Paul Norman, Neil Shephard, Cindy L Cooper, W Henry Smithson, Jonathan Boote, Heather Elphick, Amanda Loban, Matthew Franklin, Wei Sun Kua, Robin May, Jennifer Campbell, Rachael Williams, Saleema Rex, Oscar Bortolami
BACKGROUND: Asthma episodes and deaths are known to be seasonal. A number of reports have shown peaks in asthma episodes in school-aged children associated with the return to school following the summer vacation. A fall in prescription collection in the month of August has been observed, and was associated with an increase in the number of unscheduled contacts after the return to school in September. OBJECTIVE: The primary objective of the study was to assess whether or not a NHS-delivered public health intervention reduces the September peak in unscheduled medical contacts...
December 2016: Health Technology Assessment: HTA
https://www.readbyqxmd.com/read/27978840/validated-and-longitudinally-stable-asthma-phenotypes-based-on-cluster-analysis-of-the-adept-study
#11
Matthew J Loza, Ratko Djukanovic, Kian Fan Chung, Daniel Horowitz, Keying Ma, Patrick Branigan, Elliot S Barnathan, Vedrana S Susulic, Philip E Silkoff, Peter J Sterk, Frédéric Baribaud
BACKGROUND: Asthma is a disease of varying severity and differing disease mechanisms. To date, studies aimed at stratifying asthma into clinically useful phenotypes have produced a number of phenotypes that have yet to be assessed for stability and to be validated in independent cohorts. The aim of this study was to define and validate, for the first time ever, clinically driven asthma phenotypes using two independent, severe asthma cohorts: ADEPT and U-BIOPRED. METHODS: Fuzzy partition-around-medoid clustering was performed on pre-specified data from the ADEPT participants (n = 156) and independently on data from a subset of U-BIOPRED asthma participants (n = 82) for whom the same variables were available...
December 15, 2016: Respiratory Research
https://www.readbyqxmd.com/read/27925796/a-severe-asthma-disease-signature-from-gene-expression-profiling-of-peripheral-blood-from-u-biopred-cohorts
#12
Jeannette Bigler, Michael Boedigheimer, James P R Schofield, Paul J Skipp, Julie Corfield, Anthony Rowe, Ana R Sousa, Martin Timour, Lori Twehues, Xuguang Hu, Graham Roberts, Andrew A Welcher, Wen Yu, Kian F Chung, Ian M Adcock, Peter J Sterk, Ratko Djukanović
RATIONALE: Stratification of asthma at the molecular level, especially using accessible biospecimens, could greatly enable patient selection for targeted therapy. OBJECTIVES: To determine the value of blood to identify transcriptional differences between clinically defined asthmatic and non-asthmatic groups, identify potential patient subgroups based on gene expression, and explore biological pathways associated with identified differences. METHODS: Transcriptomics profiles were generated by microarray analysis of blood from 610 asthmatic and control participants in U-BIOPRED...
December 7, 2016: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/27925779/retraction-distinct-phenotypes-of-cigarette-smokers-identified-by-cluster-analysis-of-patients-with-severe-asthma
#13
(no author information available yet)
No abstract text is available yet for this article.
2016: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/27875593/enterovirus-d68-in-hospitalized-children-sequence-variation-viral-loads-and-clinical-outcomes
#14
Katherine Moyer, Huanyu Wang, Douglas Salamon, Amy Leber, Asuncion Mejias
BACKGROUND: An outbreak of enterovirus D68 (EV-D68) caused severe respiratory illness in 2014. The disease spectrum of EV-D68 infections in children with underlying medical conditions other than asthma, the role of EV-D68 loads on clinical illness, and the variation of EV-D68 strains within the same institution over time have not been described. We sought to define the association between EV-D68 loads and sequence variation, and the clinical characteristic in hospitalized children at our institution from 2011 to 2014...
2016: PloS One
https://www.readbyqxmd.com/read/27870665/near-fatal-asthma-a-heterogeneous-clinical-entity
#15
José Serrano-Pariente, Vicente Plaza
PURPOSE OF REVIEW: The aims of the present review were to describe the heterogeneous nature of near-fatal asthma (NFA) and to summarize the distinctive phenotypes identified in this subtype of asthma. RECENT FINDINGS: Clinical, physiological, and histological studies have shown a large number of triggers, pathological mechanisms, and risk factors associated with NFA. Based on the demographic and clinical characteristics of the patients, the circumstances surrounding the asthma exacerbation and some distinctive features of the disease, several clinical profiles of asthma patients with NFA have been described...
February 2017: Current Opinion in Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/27826961/development-and-validation-of-an-attitudinal-profiling-tool-for-patients-with-asthma
#16
Aileen David-Wang, David Price, Sang Heon Cho, James Chung Man Ho, Chong Kin Liam, Glenn Neira, Pei Li Teh
PURPOSE: To develop a profiling tool which accurately assigns a patient to the appropriate attitudinal cluster for the management of asthma. METHODS: Attitudinal data from an online survey of 2,467 patients with asthma from 8 Asian countries/region, aged 18-50 years, having had ≥2 prescriptions in the previous 2 years and access to social media was used in a discriminant function analysis to identify a minimal set of questions for the Profiling Tool. A split-sample procedure based on 100 sets of randomly selected estimation and validation sub-samples from the original sample was used to cross-validate the Tool and assess the robustness of its predictive accuracy...
January 2017: Allergy, Asthma & Immunology Research
https://www.readbyqxmd.com/read/27805757/the-relationship-between-biomarkers-of-fungal-allergy-and-lung-damage-in-asthma
#17
K F Woolnough, M Richardson, C Newby, M Craner, M Bourne, W Monteiro, S Siddiqui, P Bradding, C H Pashley, A J Wardlaw
BACKGROUND: Immunological biomarkers are the key to the diagnosis of allergic bronchopulmonary aspergillosis (ABPA) and fungal sensitisation, but how these relate to clinically relevant outcomes is unclear. OBJECTIVES: To assess how fungal immunological biomarkers are related to fixed airflow obstruction and radiological abnormalities in moderate to severe asthma. METHODS: Cross-sectional study of 431 asthmatics. Inflammatory biomarkers, lung function and an IgE fungal panel to colonising filamentous fungi, yeasts and fungal aeroallergens were measured...
January 2017: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/27805264/identification-of-phenotypic-clusters-of-nonsteroidal-anti-inflammatory-drugs-exacerbated-respiratory-disease
#18
H Y Lee, Y M Ye, S H Kim, G Y Ban, S C Kim, J H Kim, Y S Shin, H S Park
BACKGROUND: Clinical presentation of nonsteroidal anti-inflammatory drugs exacerbated respiratory disease (NERD) is found to be heterogeneous. This study classified phenotypic clusters to determine NERD subtypes. METHODS: We performed two-step cluster analysis using urticaria, chronic rhinosinusitis (CRS), and atopy, in a NERD cohort comprising 302 patients. Asthma exacerbation was defined as receiving at least one burst of intravenous steroid treatment and/or at least two bursts of oral steroid use (≥ 45 mg/3 days) per year...
November 2, 2016: Allergy
https://www.readbyqxmd.com/read/27788877/parental-decision-making-associated-with-pediatric-emergency-department-use-for-asthma
#19
Shawna S Mudd, C Jean Ogborn, Mary Elizabeth Bollinger, Tricia Morphew, Joan Kub, Cassie Lewis-Land, Melissa H Bellin, Arlene Butz
BACKGROUND: Disadvantaged minority children are disproportionately affected by asthma. This group is also known to frequently use the emergency department (ED) for asthma care. Understanding decisions for use of the ED is important to prevent high cost. OBJECTIVE: To examine caregiver factors associated with the decision to use the ED for asthma care in inner-city children with asthma. METHODS: One hundred fifty participants in a randomized clinical trial testing the effectiveness of a home-based asthma intervention were enrolled, and questionnaires were administered to caregivers during the child's ED asthma visit...
November 2016: Annals of Allergy, Asthma & Immunology
https://www.readbyqxmd.com/read/27773852/u-biopred-clinical-adult-asthma-clusters-linked-to-a-subset-of-sputum-omics
#20
Diane Lefaudeux, Bertrand De Meulder, Matthew J Loza, Nancy Peffer, Anthony Rowe, Frédéric Baribaud, Aruna T Bansal, Rene Lutter, Ana R Sousa, Julie Corfield, Ioannis Pandis, Per S Bakke, Massimo Caruso, Pascal Chanez, Sven-Erik Dahlén, Louise J Fleming, Stephen J Fowler, Ildiko Horvath, Norbert Krug, Paolo Montuschi, Marek Sanak, Thomas Sandstrom, Dominic E Shaw, Florian Singer, Peter J Sterk, Graham Roberts, Ian M Adcock, Ratko Djukanovic, Charles Auffray, Kian Fan Chung
BACKGROUND: Asthma is a heterogeneous disease in which there is a differential response to asthma treatments. This heterogeneity needs to be evaluated so that a personalized management approach can be provided. OBJECTIVES: We stratified patients with moderate-to-severe asthma based on clinicophysiologic parameters and performed an omics analysis of sputum. METHODS: Partition-around-medoids clustering was applied to a training set of 266 asthmatic participants from the European Unbiased Biomarkers for the Prediction of Respiratory Diseases Outcomes (U-BIOPRED) adult cohort using 8 prespecified clinic-physiologic variables...
October 20, 2016: Journal of Allergy and Clinical Immunology
keyword
keyword
108854
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"