Genome-wide transcriptional profiling linked to social class in asthma

Area of Science:

• Genomics
• Environmental Health
• Pediatric Asthma

Background:

• Low socioeconomic status (SES) is strongly linked to increased disease morbidity, including severe childhood asthma.
• The biological mechanisms connecting SES to asthma severity are not well understood.
• This study investigates how the social environment influences genomic activity in children with asthma.

Purpose of the Study:

• To determine if the social environment impacts genomic activity in children with asthma.
• To identify specific genomic pathways affected by SES in pediatric asthma patients.
• To explore the implications of these genomic alterations for asthma treatment.

Main Methods:

• Comparative analysis of children with physician-diagnosed asthma from low versus high SES backgrounds.
• Genome-wide transcriptional profiling of T lymphocytes.
• Bioinformatic analysis to identify affected transcriptional signaling pathways.

Main Results:

• Children with asthma from low SES backgrounds exhibited overexpression of inflammatory genes, including those related to chemokine activity, stress, and wound responses.
• Bioinformatic analysis indicated that decreased cyclic AMP response element binding protein and nuclear factor Y activity, along with increased nuclear factor kappaB signaling, mediated these effects.
• These pathways are known regulators of catecholamine and inflammatory signaling in immune cells.

Conclusions:

• This study provides initial evidence that the broader social environment can influence genomic processes in pediatric asthma patients.
• Gene transcription pathways regulating inflammation and catecholamine signaling differ based on SES in children with asthma.
• These SES-related molecular variations may impact the efficacy of common asthma medications.