BioSpace Collaborative

Academic/Biomedical Research
News & Jobs
Biotechnology and Pharmaceutical Channel Medical Device and Diagnostics Channel Clinical Research Channel BioSpace Collaborative    Job Seekers:  Register | Login          Employers:  Register | Login  

NEWSLETTERS
Free Newsletters
Archive
My Subscriptions

NEWS
News by Subject
News by Disease
News by Date
PLoS
Search News
Post Your News
JoVE

CAREER NETWORK
Job Seeker Login
Most Recent Jobs
Search Jobs
Post Resume
Career Fairs
Career Resources
For Employers

HOTBEDS
Regional News
US & Canada
  Biotech Bay
  Biotech Beach
  Genetown
  Pharm Country
  BioCapital
  BioMidwest
  Bio NC
  BioForest
  Southern Pharm
  BioCanada East
  C2C Services & Suppliers™
Europe
Asia

DIVERSITY

PROFILES
Company Profiles

INTELLIGENCE
Research Store

INDUSTRY EVENTS
Research Events
Post an Event
RESOURCES
Real Estate
Business Opportunities

PLoS By Category | Recent PLoS Articles
Immunology - Physiology - Respiratory Medicine

Genetic Variants of TSLP and Asthma in an Admixed Urban Population
Published: Thursday, September 22, 2011
Author: Mengling Liu et al.

by Mengling Liu, Linda Rogers, Qinyi Cheng, Yongzhao Shao, Maria Elena Fernandez-Beros, Joel N. Hirschhorn, Helen N. Lyon, Zofia K. Z. Gajdos, Sailaja Vedantam, Peter Gregersen, Michael F. Seldin, Bertram Bleck, Adaikalavan Ramasamy, Anna-Liisa Hartikainen, Marjo-Riitta Jarvelin, Mikko Kuokkanen, Tarja Laitinen, Johan Eriksson, Terho Lehtimäki, Olli T. Raitakari, Joan Reibman

Background

Thymic stromal lymphopoietin (TSLP), an IL7-like cytokine produced by bronchial epithelial cells is upregulated in asthma and induces dendritic cell maturation supporting a Th2 response. Environmental pollutants, including tobacco smoke and diesel exhaust particles upregulate TSLP suggesting that TSLP may be an interface between environmental pollution and immune responses in asthma. Since asthma is prevalent in urban communities, variants in the TSLP gene may be important in asthma susceptibility in these populations.

Objectives

To determine whether genetic variants in TSLP are associated with asthma in an urban admixed population.

Methodology and Main Results

Ten tag-SNPs in the TSLP gene were analyzed for association with asthma using 387 clinically diagnosed asthmatic cases and 212 healthy controls from an urban admixed population. One SNP (rs1898671) showed nominally significant association with asthma (odds ratio (OR)?=?1.50; 95% confidence interval (95% CI): 1.09–2.05, p?=?0.01) after adjusting for age, BMI, income, education and population stratification. Association results were consistent using two different approaches to adjust for population stratification. When stratified by smoking status, the same SNP showed a significantly increased risk associated with asthma in ex-smokers (OR?=?2.00, 95% CI: 1.04–3.83, p?=?0.04) but not significant in never-smokers (OR?=?1.34; 95% CI: 0.93–1.94, p?=?0.11). Haplotype-specific score test indicated that an elevated risk for asthma was associated with a specific haplotype of TSLP involving SNP rs1898671 (OR?=?1.58, 95% CI: 1.10–2.27, p?=?0.01). Association of this SNP with asthma was confirmed in an independent large population-based cohort consortium study (OR?=?1.15, 95% CI: 1.07–1.23, p?=?0.0003) and the results stratified by smoking status were also validated (ex-smokers: OR?=?1.21, 95% CI: 1.08–1.34, p?=?0.003; never-smokers: OR?=?1.06, 95% CI: 0.94–1.17, p?=?0.33).

Conclusions

Genetic variants in TSLP may contribute to asthma susceptibility in admixed urban populations with a gene and environment interaction.

  More...