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https://www.readbyqxmd.com/read/29339516/human-airway-branch-variation-and-chronic-obstructive-pulmonary-disease
#1
Benjamin M Smith, Hussein Traboulsi, John H M Austin, Ani Manichaikul, Eric A Hoffman, Eugene R Bleecker, Wellington V Cardoso, Christopher Cooper, David J Couper, Stephen M Dashnaw, Jia Guo, MeiLan K Han, Nadia N Hansel, Emlyn W Hughes, David R Jacobs, Richard E Kanner, Joel D Kaufman, Eric Kleerup, Ching-Long Lin, Kiang Liu, Christian M Lo Cascio, Fernando J Martinez, Jennifer N Nguyen, Martin R Prince, Stephen Rennard, Stephen S Rich, Leora Simon, Yanping Sun, Karol E Watson, Prescott G Woodruff, Carolyn J Baglole, R Graham Barr
Susceptibility to chronic obstructive pulmonary disease (COPD) beyond cigarette smoking is incompletely understood, although several genetic variants associated with COPD are known to regulate airway branch development. We demonstrate that in vivo central airway branch variants are present in 26.5% of the general population, are unchanged over 10 y, and exhibit strong familial aggregation. The most common airway branch variant is associated with COPD in two cohorts (n = 5,054), with greater central airway bifurcation density, and with emphysema throughout the lung...
January 16, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29191953/surfactant-protein-d-is-a-causal-risk-factor-for-copd-results-of-mendelian-randomisation
#2
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/29173446/serum-folate-concentrations-asthma-atopy-and-asthma-control-in-peruvian-children
#3
Andrew Nicholson, Suzanne L Pollard, John J Lima, Karina M Romero, Carla Tarazona-Meza, Gary Malpartida-Guzmán, Edward Mougey, Nadia N Hansel, William Checkley
BACKGROUND: The relationship between folate status and asthma-related outcomes has not been carefully examined in low- and middle-income countries where folate deficiency is common. METHODS: Ancillary analysis of an unmatched case-control study in which we analyzed serum folate concentrations in 412 children with asthma and 342 controls living in peri-urban communities in Lima, Peru. We examined baseline associations between folate and asthma, atopy, total serum IgE, pulmonary function, and fractional exhaled nitric oxide...
December 2017: Respiratory Medicine
https://www.readbyqxmd.com/read/29170167/neighbourhood-characteristics-and-health-outcomes-evaluating-the-association-between-socioeconomic-status-tobacco-store-density-and-health-outcomes-in-baltimore-city
#4
Panagis Galiatsatos, Cynthia Kineza, Seungyoun Hwang, Juliana Pietri, Emily Brigham, Nirupama Putcha, Cynthia S Rand, Meredith McCormack, Nadia N Hansel
INTRODUCTION: Several studies suggest that the health of an individual is influenced by the socioeconomic status (SES) of the community in which he or she lives. This analysis seeks to understand the relationship between SES, tobacco store density and health outcomes at the neighbourhood level in a large urban community. METHODS: Data from the 55 neighbourhoods of Baltimore City were reviewed and parametric tests compared demographics and health outcomes for low-income and high-income neighbourhoods, defined by the 50th percentile in median household income...
November 23, 2017: Tobacco Control
https://www.readbyqxmd.com/read/29146301/association-of-sputum-and-blood-eosinophil-concentrations-with-clinical-measures-of-copd-severity-an-analysis-of-the-spiromics-cohort
#5
Annette T Hastie, Fernando J Martinez, Jeffrey L Curtis, Claire M Doerschuk, Nadia N Hansel, Stephanie Christenson, Nirupama Putcha, Victor E Ortega, Xingnan Li, R Graham Barr, Elizabeth E Carretta, David J Couper, Christopher B Cooper, Eric A Hoffman, Richard E Kanner, Eric Kleerup, Wanda K O'Neal, Richard Paine, Stephen P Peters, Neil E Alexis, Prescott G Woodruff, MeiLan K Han, Deborah A Meyers, Eugene R Bleecker
BACKGROUND: Increased concentrations of eosinophils in blood and sputum in chronic obstructive pulmonary disease (COPD) have been associated with increased frequency of exacerbations, reduced lung function, and corticosteroid responsiveness. We aimed to assess whether high eosinophil concentrations in either sputum or blood are associated with a severe COPD phenotype, including greater exacerbation frequency, and whether blood eosinophils are predictive of sputum eosinophils. METHODS: We did a multicentre observational study analysing comprehensive baseline data from SPIROMICS in patients with COPD aged 40-80 years who had a smoking history of at least 20 pack-years, recruited from six clinical sites and additional subsites in the USA between Nov 12, 2010, and April 21, 2015...
December 2017: Lancet Respiratory Medicine
https://www.readbyqxmd.com/read/29089103/the-feasibility-of-an-air-purifier-and-secondhand-smoke-education-intervention-in-homes-of-inner-city-pregnant-women-and-infants-living-with-a-smoker
#6
Jessica L Rice, Emily Brigham, Rebecca Dineen, Sadiya Muqueeth, Gena O'Keefe, Stephanie Regenold, Kirsten Koehler, Ana Rule, Meredith McCormack, Nadia N Hansel, Gregory B Diette
OBJECTIVES: Secondhand smoke (SHS) and other air pollutants adversely affect the health of pregnant women and infants. A feasibility study aimed at reducing air pollution in homes of pregnant women or infants living with a smoker was completed. METHODS: In collaboration with the Baltimore City Health Department, women ≥ 18 years of age and either pregnant nonsmokers, or post-partum (any smoking status) with an infant age 0-12 months were recruited. Homes had at least one smoker...
October 29, 2017: Environmental Research
https://www.readbyqxmd.com/read/28948026/design-of-the-subpopulations-and-intermediate-outcome-measures-in-copd-spiromics-air-study
#7
Nadia N Hansel, Laura M Paulin, Amanda J Gassett, Roger D Peng, Neil Alexis, Vincent S Fan, Eugene Bleecker, Russell Bowler, Alejandro P Comellas, Mark Dransfield, MeiLan K Han, Victor Kim, Jerry A Krishnan, Cheryl Pirozzi, Christopher B Cooper, Fernando Martinez, Prescott G Woodruff, Patrick J Breysse, R Graham Barr, Joel D Kaufman
INTRODUCTION: Population-based epidemiological evidence suggests that exposure to ambient air pollutants increases hospitalisations and mortality from chronic obstructive pulmonary disease (COPD), but less is known about the impact of exposure to air pollutants on patient-reported outcomes, morbidity and progression of COPD. METHODS AND ANALYSIS: The Subpopulations and Intermediate Outcome Measures in COPD (SPIROMICS) Air Pollution Study (SPIROMICS AIR) was initiated in 2013 to investigate the relation between individual-level estimates of short-term and long-term air pollution exposures, day-to-day symptom variability and disease progression in individuals with COPD...
2017: BMJ Open Respiratory Research
https://www.readbyqxmd.com/read/28934249/variability-in-objective-and-subjective-measures-affects-baseline-values-in-studies-of-patients-with-copd
#8
MULTICENTER STUDY
Wayne H Anderson, Jae Wook Ha, David J Couper, Wanda K O'Neal, R Graham Barr, Eugene R Bleecker, Elizabeth E Carretta, Christopher B Cooper, Claire M Doerschuk, M Bradley Drummond, MeiLan K Han, Nadia N Hansel, Victor Kim, Eric C Kleerup, Fernando J Martinez, Stephen I Rennard, Donald Tashkin, Prescott G Woodruff, Robert Paine, Jeffrey L Curtis, Richard E Kanner
RATIONALE: Understanding the reliability and repeatability of clinical measurements used in the diagnosis, treatment and monitoring of disease progression is of critical importance across all disciplines of clinical practice and in clinical trials to assess therapeutic efficacy and safety. OBJECTIVES: Our goal is to understand normal variability for assessing true changes in health status and to more accurately utilize this data to differentiate disease characteristics and outcomes...
2017: PloS One
https://www.readbyqxmd.com/read/28916185/alveolar-eosinophilia-in-current-smokers-with-chronic-obstructive-pulmonary-disease-in-the-spiromics-cohort
#9
Carlos H Martinez, Sara X Li, Andrew J Hirzel, Valerie R Stolberg, Neil E Alexis, R Graham Barr, Eugene R Bleecker, Elizabeth E Carretta, Stephanie A Christenson, Christopher B Cooper, David J Couper, Claire M Doerschuk, MeiLan K Han, Nadia N Hansel, Annette T Hastie, Eric A Hoffman, Robert J Kaner, Fernando J Martinez, Deborah A Meyers, Wanda K O'Neal, Robert Paine, Nirupama Putcha, Stephen I Rennard, Prescott G Woodruff, Michelle Zeidler, Jeffrey L Curtis, Christine M Freeman
No abstract text is available yet for this article.
September 12, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28914352/impact-of-physical-activity-on-reporting-of-childhood-asthma-symptoms
#10
Benedicta Nneoma Nnodum, Meredith C McCormack, Nirupama Putcha, Seungyoung Hwang, Laura M Paulin, Emily P Brigham, Ashraf Fawzy, Karina Romero, Gregory B Diette, Nadia N Hansel
This study aims to determine the impact of physical activity on asthma symptom reporting among children living in an inner city. Among 147 children aged 5-12 years with physician-diagnosed asthma, we assessed asthma symptoms using twice-daily diaries and physical activity using the physical activity questionnaire for children during three 8-day periods (baseline, 3 and 6 months). Linear, logistic, and quasi-poisson regression models were used to determine the association between physical activity and asthma symptoms; adjusting for age, sex, race, BMI, caregiver's education, asthma severity, medication use, and season...
December 2017: Lung
https://www.readbyqxmd.com/read/28884423/electronic-cigarette-use-in-us-adults-at-risk-for-or-with-copd-analysis-from-two-observational-cohorts
#11
Russell P Bowler, Nadia N Hansel, Sean Jacobson, R Graham Barr, Barry J Make, MeiLan K Han, Wanda K O'Neal, Elizabeth C Oelsner, Richard Casaburi, Igor Barjaktarevic, Chris Cooper, Marilyn Foreman, Robert A Wise, Dawn L DeMeo, Edwin K Silverman, William Bailey, Kathleen F Harrington, Prescott G Woodruff, M Bradley Drummond
BACKGROUND: Electronic cigarettes (e-cigarettes) are battery-operated nicotine-delivery devices used by some smokers as a cessation tool as well as by never smokers. OBJECTIVE: To determine the usage of e-cigarettes in older adults at risk for or with chronic obstructive pulmonary disease (COPD). DESIGN: Prospective cohorts. PARTICIPANTS: COPDGene (N = 3536) and SPIROMICS (N = 1060) subjects who were current or former smokers aged 45-80...
September 7, 2017: Journal of General Internal Medicine
https://www.readbyqxmd.com/read/28877023/airway-mucin-concentration-as-a-marker-of-chronic-bronchitis
#12
Mehmet Kesimer, Amina A Ford, Agathe Ceppe, Giorgia Radicioni, Rui Cao, C William Davis, Claire M Doerschuk, Neil E Alexis, Wayne H Anderson, Ashley G Henderson, R Graham Barr, Eugene R Bleecker, Stephanie A Christenson, Christopher B Cooper, MeiLan K Han, Nadia N Hansel, Annette T Hastie, Eric A Hoffman, Richard E Kanner, Fernando Martinez, Robert Paine, Prescott G Woodruff, Wanda K O'Neal, Richard C Boucher
BACKGROUND: Chronic obstructive pulmonary disease (COPD) is characterized by chronic bronchitic and emphysematous components. In one biophysical model, the concentration of mucin on the airway surfaces is hypothesized to be a key variable that controls mucus transport in healthy persons versus cessation of transport in persons with muco-obstructive lung diseases. Under this model, it is postulated that a high mucin concentration produces the sputum and disease progression that are characteristic of chronic bronchitis...
September 7, 2017: New England Journal of Medicine
https://www.readbyqxmd.com/read/28797886/24-h-nitrogen-dioxide-concentration-is-associated-with-cooking-behaviors-and-an-increase-in-rescue-medication-use-in-children-with-asthma
#13
Laura M Paulin, D 'Ann L Williams, Roger Peng, Gregory B Diette, Meredith C McCormack, Patrick Breysse, Nadia N Hansel
Exposure to nitrogen dioxide (NO2), a byproduct of combustion, is associated with poor asthma control in children. We sought to determine whether gas-fueled kitchen appliance use is associated with 24-h indoor NO2 concentrations and whether these concentrations are associated with asthma morbidity in children. Children aged 5-12 years old with asthma were eligible. Mean 24-h NO2 concentration was measured in the kitchen over a four-day sampling period and gas stove use was captured in time activity diaries...
November 2017: Environmental Research
https://www.readbyqxmd.com/read/28704419/a-pilot-feeding-study-for-adults-with-asthma-the-healthy-eating-better-breathing-trial
#14
RANDOMIZED CONTROLLED TRIAL
Emily P Brigham, Elizabeth C Matsui, Lawrence J Appel, Deborah A Bull, Jean Curtin-Brosnan, Shuyan Zhai, Karen White, Jeanne B Charleston, Nadia N Hansel, Gregory B Diette, Meredith C McCormack
RATIONALE: Evidence from observational studies and to a lesser extent clinical trials suggest that a healthy diet may improve symptoms and lung function in patients with asthma. We conducted a pilot study to determine the feasibility of conducting a larger scale dietary trial and to provide preliminary evidence on the impact of a healthy diet on asthma outcomes. METHODS: In a randomized, two period cross-over trial, participants with asthma received a 4-week dietary intervention followed by a usual diet (or vice versa), separated by a 4-week washout...
2017: PloS One
https://www.readbyqxmd.com/read/28668356/frequency-of-exacerbations-in-patients-with-chronic-obstructive-pulmonary-disease-an-analysis-of-the-spiromics-cohort
#15
MeiLan K Han, Pedro M Quibrera, Elizabeth E Carretta, R Graham Barr, Eugene R Bleecker, Russell P Bowler, Christopher B Cooper, Alejandro Comellas, David J Couper, Jeffrey L Curtis, Gerard Criner, Mark T Dransfield, Nadia N Hansel, Eric A Hoffman, Richard E Kanner, Jerry A Krishnan, Carlos H Martinez, Cheryl B Pirozzi, Wanda K O'Neal, Stephen Rennard, Donald P Tashkin, Jadwiga A Wedzicha, Prescott Woodruff, Robert Paine, Fernando J Martinez
BACKGROUND: Present treatment strategies to stratify exacerbation risk in patients with chronic obstructive pulmonary disease (COPD) rely on a history of two or more events in the previous year. We aimed to understand year to year variability in exacerbations and factors associated with consistent exacerbations over time. METHODS: In this longitudinal, prospective analysis of exacerbations in the Subpopulations and Intermediate Outcome Measures in COPD Study (SPIROMICS) cohort, we analysed patients aged 40-80 years with COPD for whom 3 years of prospective data were available, identified through various means including care at academic and non-academic medical centres, word of mouth, and existing patient registries...
August 2017: Lancet Respiratory Medicine
https://www.readbyqxmd.com/read/28642260/cigarette-smoke-disrupts-monolayer-integrity-by-altering-epithelial-cell-cell-adhesion-and-cortical-tension
#16
Kristine Nishida, Kieran A Brune, Nirupama Putcha, Pooja Mandke, Wanda K O'Neal, Danny Shade, Vasudha Srivastava, Menghan Wang, Hong Lam, Steven S An, M Bradley Drummond, Nadia N Hansel, Douglas N Robinson, Venkataramana K Sidhaye
Chronic obstructive pulmonary disease (COPD) is a major cause of morbidity and mortality. Cigarette smoke (CS) drives disease development and progression. The epithelial barrier is damaged by CS with increased monolayer permeability. However, the molecular changes that cause this barrier disruption and the interaction between adhesion proteins and the cytoskeleton are not well defined. We hypothesized that CS alters monolayer integrity by increasing cell contractility and decreasing cell adhesion in epithelia...
September 1, 2017: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/28637835/do-copd-subtypes-really-exist-copd-heterogeneity-and-clustering-in-10-independent-cohorts
#17
MULTICENTER STUDY
Peter J Castaldi, Marta Benet, Hans Petersen, Nicholas Rafaels, James Finigan, Matteo Paoletti, H Marike Boezen, Judith M Vonk, Russell Bowler, Massimo Pistolesi, Milo A Puhan, Josep Anto, Els Wauters, Diether Lambrechts, Wim Janssens, Francesca Bigazzi, Gianna Camiciottoli, Michael H Cho, Craig P Hersh, Kathleen Barnes, Stephen Rennard, Meher Preethi Boorgula, Jennifer Dy, Nadia N Hansel, James D Crapo, Yohannes Tesfaigzi, Alvar Agusti, Edwin K Silverman, Judith Garcia-Aymerich
BACKGROUND: COPD is a heterogeneous disease, but there is little consensus on specific definitions for COPD subtypes. Unsupervised clustering offers the promise of 'unbiased' data-driven assessment of COPD heterogeneity. Multiple groups have identified COPD subtypes using cluster analysis, but there has been no systematic assessment of the reproducibility of these subtypes. OBJECTIVE: We performed clustering analyses across 10 cohorts in North America and Europe in order to assess the reproducibility of (1) correlation patterns of key COPD-related clinical characteristics and (2) clustering results...
November 2017: Thorax
https://www.readbyqxmd.com/read/28588900/associations-between-serum-25-oh-d-concentrations-and-prevalent-asthma-among-children-living-in-communities-with-differing-levels-of-urbanization-a-cross-sectional-study
#18
Suzanne L Pollard, John J Lima, Karina Romero, Carla Tarazona-Meza, Edward Mougey, Katherine Tomaino, Gary Malpartida-Guzmán, Nadia N Hansel, William Checkley
BACKGROUND: Prior evidence suggests that vitamin D deficiency may increase the risk of asthma and atopy and impair pulmonary function in children. METHODS: In this cross-sectional analysis nested in a case-control study, we analyzed serum 25(OH)D concentrations in 413 children with asthma and 471 children without asthma living in two geographically adjacent study communities (Pampas and Villa El Salvador). We measured total and antigen-specific IgE levels, pulmonary function, asthma control, and exhaled nitric oxide...
2017: Asthma Research and Practice
https://www.readbyqxmd.com/read/28533007/free-25-oh-d-concentrations-are-associated-with-atopy-and-lung-function-in-children-with-asthma
#19
Suzanne L Pollard, John J Lima, Edward Mougey, Karina Romero, Carla Tarazona-Meza, Katherine Tomaino, Gary Malpartida Guzmán, Nadia N Hansel, William Checkley
BACKGROUND: Evidence suggests free mono-hydroxyvitamin D (25[OH]D) concentrations are more strongly linked to certain outcomes than total concentrations; however, no studies have examined the relation between free 25(OH)D and respiratory or allergic disease. OBJECTIVE: To examine associations between total and free 25(OH)D concentrations and asthma outcomes. METHODS: We quantified total and free 25(OH)D concentrations in 137 Peruvian children with asthma and 152 children without asthma and examined associations with asthma outcomes...
July 2017: Annals of Allergy, Asthma & Immunology
https://www.readbyqxmd.com/read/28459622/respiratory-symptoms-items-from-the-copd-assessment-test-identify-ever-smokers-with-preserved-lung-function-at-higher-risk-for-poor-respiratory-outcomes-an-analysis-of-the-subpopulations-and-intermediate-outcome-measures-in-copd-study-cohort
#20
Carlos H Martinez, Susan Murray, R Graham Barr, Eugene Bleecker, Russell P Bowler, Stephanie A Christenson, Alejandro P Comellas, Christopher B Cooper, David Couper, Gerard J Criner, Jeffrey L Curtis, Mark T Dransfield, Nadia N Hansel, Eric A Hoffman, Richard E Kanner, Eric Kleerup, Jerry A Krishnan, Stephen C Lazarus, Nancy K Leidy, Wanda O'Neal, Fernando J Martinez, Robert Paine, Stephen I Rennard, Donald P Tashkin, Prescott G Woodruff, MeiLan K Han
RATIONALE: Ever-smokers without airflow obstruction scores greater than or equal to 10 on the COPD Assessment Test (CAT) still have frequent acute respiratory disease events (exacerbation-like), impaired exercise capacity, and imaging abnormalities. Identification of these subjects could provide new opportunities for targeted interventions. OBJECTIVES: We hypothesized that the four respiratory-related items of the CAT might be useful for identifying such individuals, with discriminative ability similar to CAT, which is an eight-item questionnaire used to assess chronic obstructive pulmonary disease impact, including nonrespiratory questions, with scores ranging from 0 to 40...
May 2017: Annals of the American Thoracic Society
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