Background: Cigarette smoking is the principal environmental risk factor for developing COPD, and nicotine dependence strongly influences smoking behavior. This study was performed to elucidate the relationship between nicotine dependence, genetic susceptibility to nicotine dependence, and volumetric CT findings in smokers.
Methods: Current smokers with COPD (GOLD stage ≥ 2) or normal spirometry were analyzed from the COPDGene Study, a prospective observational study. Nicotine dependence was determined by the Fagerstrom test for nicotine dependence (FTND). Volumetric CT acquisitions measuring the percent of emphysema on inspiratory CT (% of lung <-950 HU) and gas trapping on expiratory CT (% of lung <-856 HU) were obtained. Genotypes for two SNPs in the CHRNA3/5 region (rs8034191, rs1051730) previously associated with nicotine dependence and COPD were analyzed for association to COPD and nicotine dependence phenotypes.
Results: Among 842 currently smoking subjects (335 COPD cases and 507 controls), 329 subjects (39.1%) showed high nicotine dependence. Subjects with high nicotine dependence had greater cumulative and current amounts of smoking. However, emphysema severity was negatively correlated with the FTND score in controls (ρ = -0.19, p < .0001) as well as in COPD cases (ρ = -0.18, p = 0.0008). Lower FTND score, male gender, lower body mass index, and lower FEV1 were independent risk factors for emphysema severity in COPD cases. Both CHRNA3/5 SNPs were associated with FTND in current smokers. An association of genetic variants in CHRNA3/5 with severity of emphysema was only found in former smokers, but not in current smokers.
Conclusions: Nicotine dependence was a negative predictor for emphysema on CT in COPD and control smokers. Increased inflammation in more highly addicted current smokers could influence the CT lung density distribution, which may influence genetic association studies of emphysema phenotypes.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3033825 | PMC |
| http://dx.doi.org/10.1186/1465-9921-12-9 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Association Between GABRG2 and Self-Rating of the Effects of Alcohol in a French Young Adult Sample.
Risk Manag Healthc Policy
January 2025
Université Paris Cité, Inserm U1266, Institut de Psychiatrie et Neurosciences de Paris (IPNP), Team Vulnerability of Psychiatric and Addictive Disorders, Paris, France.
Purpose: Alcohol use is a leading risk factor for preventable death, injury, and disease globally. Low sensitivity to the effects of alcohol is influenced by genes and predicts risk for harmful alcohol use and alcohol use disorder (AUD). Alcohol induces effects partly by modulation of gamma-aminobutyric acid receptors type A (GABARs).
View Article and Find Full Text PDFCorrelates of Susceptibility to Nicotine Pouch Use Among Australian Adolescents and Younger Adults.
Nicotine Tob Res
January 2025
Melbourne Centre for Behaviour Change, Melbourne School of Psychological Sciences, University of Melbourne, Parkville, Australia.
Introduction: Nicotine pouches are growing rapidly in popularity. These products have been found to contain high levels of nicotine, raising concerns about the risk of nicotine dependence and addiction. Preventing uptake of nicotine pouches, particularly among adolescents and younger adults, is thus important.
View Article and Find Full Text PDFRacial disparities in extended venous thromboembolism prophylaxis after hysterectomy.
PLoS One
January 2025
Robert Wood Johnson Medical School, Rutgers University, New Brunswick, NJ, United States of America.
Background: Venous thromboembolism (VTE) is a significant preventable cause of postoperative morbidity and mortality after major abdominopelvic surgery that calls for extended VTE prophylaxis (eVTEp). Literature suggests that significant racial disparities may exist in post-operative care.
Objective: The study sought to examine if racial disparities exist in the administration of eVTEp after hysterectomy in a statewide collaborative.
Effectiveness of a Dentist-based Anti-Smoking Intervention Among Malaysian Adolescents: A Randomized Controlled Field Trial.
Asian Pac J Cancer Prev
January 2025
Department of Community Oral Health and Clinical Prevention, Faculty of Dentistry, Universiti Malaya, Kuala Lumpur, 50603, Malaysia.
Background: The KOTAK program is a national public health initiative in Malaysian primary and secondary schools aimed at reducing youth smoking through school dental services. This study evaluated its effectiveness in Seremban, Negeri Sembilan, Malaysia.
Objectives: 1) To determine the percentage of schoolchildren who quit smoking through the KOTAK program; 2) To identify factors associated with quitting smoking in the program.
Insights into prescribing patterns for antidepressants: an evidence-based analysis.
BMC Med Inform Decis Mak
January 2025
Department of Health Administration and Policy, College of Public Health, George Mason University, 4400 University Dr, Fairfax, VA, 22030, USA.
Background: Antidepressants are a primary treatment for depression, yet prescribing them poses significant challenges due to the absence of clear guidelines for selecting the most suitable option for individual patients. This study aimed to analyze prescribing patterns for antidepressants across healthcare providers, including physicians, physician assistants, nurse practitioners, and pharmacists, to better understand the complex factors influencing these patterns in the management of depression.
Methods: Least Absolute Shrinkage and Selection Operator (LASSO) regression was employed to identify variables that explained the variation in the prescribed antidepressants, utilizing a large number of claims.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!