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Nadia hansel

Kamau O Peters, D' Ann L Williams, Salahadin Abubaker, Jean Curtin-Brosnan, Meredith C McCormack, Roger Peng, Patrick N Breysse, Elizabeth C Matsui, Nadia N Hansel, Gregory B Diette, Paul T Strickland
Polycyclic aromatic hydrocarbons (PAHs), the by-products of incomplete combustion of organic materials, are commonly found on particulate matter (PM) and have been associated with the development of asthma and asthma exacerbation in urban populations. We examined time spent in the home and outdoors as predictors of exposures to airborne PAHs and measured urinary 1-hydroxypyrene-glucuronide (1-OHPG) as internal dose of PAHs in 118 children aged 5-12 years from Baltimore, MD. During weeklong periods (Saturday-Saturday) in each of four seasons: daily activities were assessed using questionnaires, indoor air nicotine and PM concentrations were monitored, and urine specimens were collected on Tuesday (day 3) and Saturday (day 7) for measurement of 1-OHPG...
December 14, 2016: Journal of Exposure Science & Environmental Epidemiology
William Checkley, Maria P Deza, Jost Klawitter, Karina M Romero, Jelena Klawitter, Suzanne L Pollard, Robert A Wise, Uwe Christians, Nadia N Hansel
BACKGROUND: The diagnosis of asthma in children is challenging and relies on a combination of clinical factors and biomarkers including methacholine challenge, lung function, bronchodilator responsiveness, and presence of airway inflammation. No single test is diagnostic. We sought to identify a pattern of inflammatory biomarkers that was unique to asthma using a targeted metabolomics approach combined with data science methods. METHODS: We conducted a nested case-control study of 100 children living in a peri-urban community in Lima, Peru...
December 2016: Respiratory Medicine
Rasika Ann Mathias, Margaret A Taub, Christopher R Gignoux, Wenqing Fu, Shaila Musharoff, Timothy D O'Connor, Candelaria Vergara, Dara G Torgerson, Maria Pino-Yanes, Suyash S Shringarpure, Lili Huang, Nicholas Rafaels, Meher Preethi Boorgula, Henry Richard Johnston, Victor E Ortega, Albert M Levin, Wei Song, Raul Torres, Badri Padhukasahasram, Celeste Eng, Delmy-Aracely Mejia-Mejia, Trevor Ferguson, Zhaohui S Qin, Alan F Scott, Maria Yazdanbakhsh, James G Wilson, Javier Marrugo, Leslie A Lange, Rajesh Kumar, Pedro C Avila, L Keoki Williams, Harold Watson, Lorraine B Ware, Christopher Olopade, Olufunmilayo Olopade, Ricardo Oliveira, Carole Ober, Dan L Nicolae, Deborah Meyers, Alvaro Mayorga, Jennifer Knight-Madden, Tina Hartert, Nadia N Hansel, Marilyn G Foreman, Jean G Ford, Mezbah U Faruque, Georgia M Dunston, Luis Caraballo, Esteban G Burchard, Eugene Bleecker, Maria Ilma Araujo, Edwin Francisco Herrera-Paz, Kimberly Gietzen, Wendy E Grus, Michael Bamshad, Carlos D Bustamante, Eimear E Kenny, Ryan D Hernandez, Terri H Beaty, Ingo Ruczinski, Joshua Akey, Kathleen C Barnes
The African Diaspora in the Western Hemisphere represents one of the largest forced migrations in history and had a profound impact on genetic diversity in modern populations. To date, the fine-scale population structure of descendants of the African Diaspora remains largely uncharacterized. Here we present genetic variation from deeply sequenced genomes of 642 individuals from North and South American, Caribbean and West African populations, substantially increasing the lexicon of human genomic variation and suggesting much variation remains to be discovered in African-admixed populations in the Americas...
October 11, 2016: Nature Communications
Laura M Paulin, Nadia N Hansel
No abstract text is available yet for this article.
October 1, 2016: American Journal of Respiratory and Critical Care Medicine
Meredith C McCormack, Andrew J Belli, Darryn Waugh, Elizabeth C Matsui, Roger D Peng, D'Ann L Williams, Laura Paulin, Anik Saha, Charles M Aloe, Gregory B Diette, Patrick N Breysse, Nadia N Hansel
RATIONALE: There is limited evidence of the effect of exposure to heat on chronic obstructive pulmonary disease (COPD) morbidity, and the interactive effect between indoor heat and air pollution has not been established. OBJECTIVES: To determine the effect of indoor and outdoor heat exposure on COPD morbidity and to determine whether air pollution concentrations modify the effect of temperature. METHODS: Sixty-nine participants with COPD were enrolled in a longitudinal cohort study, and data from the 601 participant days that occurred during the warm weather season were included in the analysis...
December 2016: Annals of the American Thoracic Society
Jason D Keene, Sean Jacobson, Katerina Kechris, Gregory L Kinney, Marilyn G Foreman, Claire M Doerschuk, Barry J Make, Jeffrey L Curtis, Stephen I Rennard, R Graham Barr, Eugene R Bleecker, Richard E Kanner, Eric C Kleerup, Nadia N Hansel, Prescott G Woodruff, MeiLan K Han, Robert Paine Iii, Fernando J Martinez, Russell P Bowler, Wanda K O'Neal
RATIONALE: COPD exacerbations are associated with disease progression, higher healthcare cost, and increased mortality. Published predictors of future exacerbations include previous exacerbation, airflow obstruction, poor overall health, home oxygen use, and gastroesophageal reflux. The value of adding blood biomarkers to clinical variables to predict exacerbations remains unproven. METHODS: Subjects from SPIROMICS (n=1544) and COPDGene (n=602) cohorts had 90 plasma or serum candidate proteins measured on study entry using Myriad-RBM multiplex panels...
August 31, 2016: American Journal of Respiratory and Critical Care Medicine
Allison A Lambert, Nirupama Putcha, M Bradley Drummond, Aladin M Boriek, Nicola A Hanania, Victor Kim, Gregory L Kinney, Merry-Lynn N McDonald, Emily P Brigham, Robert A Wise, Meredith C McCormack, Nadia N Hansel
BACKGROUND: Obesity is prevalent in the United States; however the impact of obesity upon COPD morbidity is unclear. We hypothesized that obesity is associated with worse outcomes in COPD. METHODS: We examined 3631 participants from the multicenter prospective cohort study COPDGene who had spirometry confirmed COPD, a post-bronchodilator FEV1 <80% predicted and a body mass index (BMI) ≥18.5kg/m2. We conducted logistic and linear regression analyses to determine the association between COPD outcomes and obesity class, adjusting for relevant confounders...
August 25, 2016: Chest
Carlos H Martinez, Alejandro A Diaz, Catherine Meldrum, Jeffrey L Curtis, Christopher B Cooper, Cheryl Pirozzi, Richard E Kanner, Robert Paine Iii, Prescott G Woodruff, Eugene R Bleecker, Nadia N Hansel, R Graham Barr, Nathaniel Marchetti, Gerard J Criner, Ella A Kazerooni, Eric A Hoffman, Brian D Ross, Craig J Galban, Christine T Cigolle, Fernando J Martinez, MeiLan K Han
RATIONALE: Aging is associated with reduced forced expiratory volume in the first second (FEV1) to forced vital capacity (FVC) ratio (FEV1/FVC), hyperinflation and alveolar enlargement, but little is known about how age affects small airways. We hypothesized that chest computed tomography(CT)-assessed functional small airway would increase with age, even among asymptomatic individuals. METHODS: We used parametric response mapping analysis of paired inspiratory/expiratory CTs to identify functional small airway abnormality (PRMFSA) and emphysema (PRMEMPH) in the SPIROMICS cohort...
August 26, 2016: American Journal of Respiratory and Critical Care Medicine
Wei Sun, Katerina Kechris, Sean Jacobson, M Bradley Drummond, Gregory A Hawkins, Jenny Yang, Ting-Huei Chen, Pedro Miguel Quibrera, Wayne Anderson, R Graham Barr, Patricia V Basta, Eugene R Bleecker, Terri Beaty, Richard Casaburi, Peter Castaldi, Michael H Cho, Alejandro Comellas, James D Crapo, Gerard Criner, Dawn Demeo, Stephanie A Christenson, David J Couper, Jeffrey L Curtis, Claire M Doerschuk, Christine M Freeman, Natalia A Gouskova, MeiLan K Han, Nicola A Hanania, Nadia N Hansel, Craig P Hersh, Eric A Hoffman, Robert J Kaner, Richard E Kanner, Eric C Kleerup, Sharon Lutz, Fernando J Martinez, Deborah A Meyers, Stephen P Peters, Elizabeth A Regan, Stephen I Rennard, Mary Beth Scholand, Edwin K Silverman, Prescott G Woodruff, Wanda K O'Neal, Russell P Bowler
Implementing precision medicine for complex diseases such as chronic obstructive lung disease (COPD) will require extensive use of biomarkers and an in-depth understanding of how genetic, epigenetic, and environmental variations contribute to phenotypic diversity and disease progression. A meta-analysis from two large cohorts of current and former smokers with and without COPD [SPIROMICS (N = 750); COPDGene (N = 590)] was used to identify single nucleotide polymorphisms (SNPs) associated with measurement of 88 blood proteins (protein quantitative trait loci; pQTLs)...
August 2016: PLoS Genetics
Jered P Sieren, John D Newell, R Graham Barr, Eugene R Bleecker, Nathan Burnette, Elizabeth E Carretta, David Couper, Jonathan Goldin, Junfeng Guo, MeiLan K Han, Nadia N Hansel, Richard E Kanner, Ella A Kazerooni, Fernando J Martinez, Stephen Rennard, Prescott G Woodruff, Eric A Hoffman
Multidetector row computed tomography (MDCT) is increasingly taking a central role in identifying subphenotypes within chronic obstructive pulmonary disease (COPD), asthma, and other lung-related disease populations, allowing for the quantification of the amount and distribution of altered parenchyma along with the characterization of airway and vascular anatomy. The embedding of quantitative CT (QCT) into a multicenter trial with a variety of scanner makes and models along with the variety of pressures within a clinical radiology setting has proven challenging, especially in the context of a longitudinal study...
October 1, 2016: American Journal of Respiratory and Critical Care Medicine
Andrew J Belli, Sonali Bose, Neil Aggarwal, Christopher DaSilva, Sritika Thapa, Laura Grammer, Laura M Paulin, Nadia N Hansel
INTRODUCTION: Exposure to fine particulate matter (PM2.5) is associated with worse morbidity in individuals with COPD. Inhaled PM is phagocytosed by airway macrophages (AM), and black carbon measured in AM may serve as a biomarker of air pollution exposure. As there is little data on how indoor PM exposure may influence AM black carbon content in those with respiratory disease, we investigated the association of indoor PM2.5 concentration to AM black carbon content in adults with COPD...
October 2016: Environmental Research
Prescott G Woodruff, R Graham Barr, Eugene Bleecker, Stephanie A Christenson, David Couper, Jeffrey L Curtis, Natalia A Gouskova, Nadia N Hansel, Eric A Hoffman, Richard E Kanner, Eric Kleerup, Stephen C Lazarus, Fernando J Martinez, Robert Paine, Stephen Rennard, Donald P Tashkin, MeiLan K Han
BACKGROUND: Currently, the diagnosis of chronic obstructive pulmonary disease (COPD) requires a ratio of forced expiratory volume in 1 second (FEV1) to forced vital capacity (FVC) of less than 0.70 as assessed by spirometry after bronchodilator use. However, many smokers who do not meet this definition have respiratory symptoms. METHODS: We conducted an observational study involving 2736 current or former smokers and controls who had never smoked and measured their respiratory symptoms using the COPD Assessment Test (CAT; scores range from 0 to 40, with higher scores indicating greater severity of symptoms)...
May 12, 2016: New England Journal of Medicine
Kamel Mohammedi, Aminata Compaoré, Louis Potier, Narimène Belhatem, Marilyne Feron, Nadia Matallah, Florence Travert, Boris Hansel, Gilberto Velho, Ronan Roussel, Magid Hallab, Michel Marre
BACKGROUND: Pulse wave velocity is a marker of arterial stiffness. The aim of this study was to compare pulse wave velocity in patients with type 2 diabetes (T2DM), or obesity and healthy subjects in an outpatient setting. METHODS: A cross-sectional study was conducted in patients with obesity without T2DM (n = 37), T2DM without obesity (n = 40), T2DM plus obesity (n = 43), and healthy controls (n = 114). Outpatient measurement of the finger-toe pulse wave velocity (ftPWV) was performed using a pOpmètre® device...
April 5, 2016: Journal of Diabetes
Laura Paulin, Nadia Hansel
Air pollution is a leading cause of morbidity and mortality throughout the world, particularly in individuals with existing lung disease. Of the most common air pollutants, particulate matter (PM) is associated with an increased risk of exacerbations and respiratory symptoms in individuals with existing lung disease, and to a lesser extent, in those without known respiratory issues. The majority of published research has focused on the effects of PM exposures on symptoms and health care utilization. Fewer studies focus on the impact of PM on objective measurements of pulmonary function...
2016: F1000Research
Nirupama Putcha, R Graham Barr, Meilan K Han, Prescott G Woodruff, Eugene R Bleecker, Richard E Kanner, Fernando J Martinez, Benjamin M Smith, Donald P Tashkin, Russell P Bowler, Mark D Eisner, Stephen I Rennard, Robert A Wise, Nadia N Hansel
BACKGROUND: Second-hand smoke (SHS) exposure has been linked to the development of and morbidity from lung disease. We sought to advance understanding of the impact of SHS on health-related outcomes in individuals with COPD. METHODS: Among the participants with COPD in SPIROMICS, recent SHS exposure was quantified as (1) hours of reported exposure in the past week or (2) reported living with a smoker. We performed adjusted regression for SHS with outcomes, testing for interactions with gender, race, smoking and obesity...
March 9, 2016: Thorax
Carlos H Martinez, Alejandro A Diaz, Amit D Parulekar, Stephen I Rennard, Richard E Kanner, Nadia N Hansel, David Couper, Kristen E Holm, Karin F Hoth, Jeffrey L Curtis, Fernando J Martinez, Nicola A Hanania, Elizabeth A Regan, Robert Paine, Christine T Cigolle, MeiLan K Han
OBJECTIVE: Younger persons with COPD report worse health-related quality of life (HRQL) than do older individuals. The factors explaining these differences remain unclear. The objective of this article was to explore factors associated with age-related differences in HRQL in COPD. METHODS: Cross-sectional analysis of participants with COPD, any Global Initiative for Chronic Obstructive Lung Disease grade of airflow limitation, and ≥ 50 years old in two cohorts: the Genetic Epidemiology of COPD (COPDGene) study and the Subpopulations and Intermediate Outcome Measures in COPD Study (SPIROMICS)...
April 2016: Chest
William Checkley, Marilyn G Foreman, Surya P Bhatt, Mark T Dransfield, MeiLan Han, Nicola A Hanania, Nadia N Hansel, Elizabeth A Regan, Robert A Wise
The Global Initiative for Chronic Obstructive Lung Disease (GOLD) severity criterion for COPD is used widely in clinical and research settings; however, it requires the use of ethnic- or population-specific reference equations. We propose two alternative severity criteria based on absolute post-bronchodilator FEV1 values (FEV1 and FEV1/height2) that do not depend on reference equations. We compared the accuracy of these classification schemasto those based on % predicted values (GOLD criterion) and Z-scores of post-bronchodilator FEV1 to predict COPD-related functional outcomes or percent emphysema by computerized tomography of the lung...
February 2016: Respiratory Medicine
Chelsea Gaviola, Catherine H Miele, Robert A Wise, Robert H Gilman, Devan Jaganath, J Jaime Miranda, Antonio Bernabe-Ortiz, Nadia N Hansel, William Checkley
BACKGROUND: Urbanisation is an important contributor to the prevalence of asthma worldwide, and the burden of this effect in low-income and middle-income countries undergoing rapid industrialisation appears to be growing. We sought to characterise adult asthma prevalence across four geographically diverse settings in Peru and identify both individual and environmental risk factors associated with adult asthma. METHODS: We collected sociodemographics, clinical history and spirometry in adults aged ≥35 years...
February 2016: Thorax
Nadia N Hansel, Meredith C McCormack, Victor Kim
Chronic Obstructive Pulmonary Disease (COPD) affects 12-16 million people in the United States and is the third-leading cause of death. In developed countries, smoking is the greatest risk factor for the development of COPD, but other exposures also contribute to the development and progression of the disease. Several studies suggest, though are not definitive, that outdoor air pollution exposure is linked to the prevalence and incidence of COPD. Among individuals with COPD, outdoor air pollutants are associated with loss of lung function and increased respiratory symptoms...
June 2016: COPD
Megan Hardin, Marilyn Foreman, Mark T Dransfield, Nadia Hansel, MeiLan K Han, Michael H Cho, Surya P Bhatt, Joe Ramsdell, David Lynch, Jeffrey L Curtis, Edwin K Silverman, George Washko, Dawn DeMeo
Recent studies suggest that males with chronic obstructive pulmonary disease (COPD) have more emphysema than females. It is not known if these differences persist across degrees of COPD severity. Our aim was to identify sex-specific differences in quantitative emphysema within COPD subgroups based on COPD severity.We included non-Hispanic white and African-American subjects from the COPDGene study with at least 10 pack-years of smoking and COPD Global Initiative for Chronic Obstructive Lung Disease (GOLD) spirometry grade II or greater...
January 2016: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
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