Asthma affects >300 million people worldwide. Both genetic and environmental factors contribute to risk, but interactions between them are poorly understood. Our studies in COAST children have identified significant gene-environment interactions (GEIs) and at least two independent pathways of risk for human rhinovirus (HRV)-associated wheezing illness in infancy and asthma onset in childhood. One pathway is associated with genotype at the 17q21 asthma locus and a second is associated with allergic sensitization in the first three years of life, expression of FCSRI receptors on peripheral blood dendritic cells, and genotype at the FCERIA locus. Moreover, genotype at the vitamin D receptor (VDR) locus is independently associated with duration and severity of HRV illness in older children. The overall objectives of this proposal are to study global transcriptional (RNA) and epigenetic (methylation) responses to human rhinovirus (HRV) infection in nasal epithelial cells (NECs) from COAST children, and further characterize both 17q21-dependent and 17q21-independent pathways of response. These studies will identify expression quantitative trait loci (eQTLs) and methylation (me)QTLs in HRV-infected and/or in mock-infected NECs, a relevant primary cell model. All functional variants (eQTLs and meQTLs) will be further evaluated for associations with phenotypes assessed in COAST children from birth through adolescence. Lastly, we will build networks of correlated transcriptional responses to characterize the impact of HRV infection on the molecular system in NECs. To our knowledge, these studies will be the first to use a systems genetic approach to elucidate the mechanisms underlying multiple pathways of risk for asthma and to characterize the molecular interactions between genetic and environmental risk factors for asthma in relevant, primary cells. The results of these studies will significantly impact our understanding of asthma pathogenesis, provide a new paradigm for elucidating function in asthma genetics, and potentially identify new pathways for the prevention and treatment of childhood asthma.

Public Health Relevance

Asthma affects >20 million people in the U.S. Wheezing with rhinovirus (RV) infection is a significant risk factor for asthma. We will characterize transcriptional and epigenomic responses to RV in nasal epithelial cells, and build networks of interacting genes to understand the impact of RV on the molecular system. These studies will impact our understanding of asthma pathogenesis and identify new therapeutic pathways.

Agency
National Institute of Health (NIH)
Type
Research Program Projects (P01)
Project #
5P01HL070831-12
Application #
8743243
Study Section
Heart, Lung, and Blood Program Project Review Committee (HLBP)
Project Start
Project End
Budget Start
Budget End
Support Year
12
Fiscal Year
2014
Total Cost
Indirect Cost
Name
University of Wisconsin Madison
Department
Type
DUNS #
City
Madison
State
WI
Country
United States
Zip Code
53715
Higano, Nara S; Hahn, Andrew D; Tkach, Jean A et al. (2016) Retrospective respiratory self-gating and removal of bulk motion in pulmonary UTE MRI of neonates and adults. Magn Reson Med :
Anderson, Halie M; Lemanske Jr, Robert F; Arron, Joseph R et al. (2016) Relationships among aeroallergen sensitization, peripheral blood eosinophils, and periostin in pediatric asthma development. J Allergy Clin Immunol :
Rubner, Frederick J; Jackson, Daniel J; Evans, Michael D et al. (2016) Early life rhinovirus wheezing, allergic sensitization, and asthma risk at adolescence. J Allergy Clin Immunol :
Bochkov, Yury A; Watters, Kelly; Basnet, Sarmila et al. (2016) Mutations in VP1 and 3A proteins improve binding and replication of rhinovirus C15 in HeLa-E8 cells. Virology 499:350-360
Fawkner-Corbett, David W; Khoo, Siew Kim; Duarte, Carminha M et al. (2016) Rhinovirus-C detection in children presenting with acute respiratory infection to hospital in Brazil. J Med Virol 88:58-63
Bochkov, Yury A; Gern, James E (2016) Rhinoviruses and Their Receptors: Implications for Allergic Disease. Curr Allergy Asthma Rep 16:30
Nicodemus-Johnson, Jessie; Myers, Rachel A; Sakabe, Noburu J et al. (2016) DNA methylation in lung cells is associated with asthma endotypes and genetic risk. JCI Insight 1:e90151
Anderson, Halie M; Lemanske Jr, Robert F; Evans, Michael D et al. (2016) Assessment of wheezing frequency and viral etiology on childhood and adolescent asthma risk. J Allergy Clin Immunol :
Nicodemus-Johnson, Jessie; Naughton, Katherine A; Sudi, Jyotsna et al. (2016) Genome-Wide Methylation Study Identifies an IL-13-induced Epigenetic Signature in Asthmatic Airways. Am J Respir Crit Care Med 193:376-85
Bønnelykke, Klaus; Ober, Carole (2016) Leveraging gene-environment interactions and endotypes for asthma gene discovery. J Allergy Clin Immunol 137:667-79

Showing the most recent 10 out of 133 publications