Interaction between secondhand smoke exposure and IL-17 gene polymorphism in pediatric asthma

Area of Science:

• Genetics
• Environmental Health
• Pediatric Pulmonology

Background:

• Asthma affects 300 million globally, influenced by genes and environment.
• Smoking induces IL-17 inflammation, potentially varying with IL-17 polymorphisms.
• Understanding these interactions is crucial for pediatric asthma management.

Purpose of the Study:

• To investigate the impact of IL-17 polymorphisms on pediatric asthma.
• To examine the interaction between IL-17 gene variations and secondhand smoke exposure in children with asthma.

Main Methods:

• 100 pediatric asthma patients and 100 controls were studied.
• Secondhand smoke exposure (SHSe) assessed via cotinine levels.
• IL-17F (rs763780) and IL-17A (rs8193036, rs2275913) polymorphisms analyzed.

Main Results:

• Asthmatic children had lower cotinine levels than controls (p < 0.001).
• No significant differences in genotype distributions or allele frequencies were found across groups.
• Neither IL-17 polymorphisms nor their interaction with SHS showed association with asthma.

Conclusions:

• No association found between IL-17 polymorphisms, SHS, and childhood asthma.
• Lower cotinine in asthmatics suggests parental SHS exposure.
• High SHS exposure remains a significant environmental issue.