Isocyanates, polyurethane and childhood asthma.

Area of Science:

• Environmental Health
• Immunology
• Occupational Medicine

Background:

• Isocyanates are primary causes of occupational asthma, with workplace levels highly regulated.
• Despite regulations, isocyanate-induced asthma remains prevalent, with dermal exposure gaining attention.
• The rising asthma prevalence in the general population suggests environmental factors, possibly from consumer products, play a role.

Purpose of the Study:

• To investigate the potential link between isocyanates in consumer products and the increasing prevalence of asthma.
• To review evidence for isocyanates and polyurethanes in non-occupational allergy and respiratory diseases.
• To highlight the need for research into skin exposure and non-occupational asthma.

Main Methods:

• Review of theoretical, epidemiological, experimental, and clinical evidence.
• Examination of isocyanate presence in common polyurethane-containing consumer materials.
• Analysis of immune system responses to early-life chemical stressors.

Main Results:

• Isocyanates are present in ubiquitous consumer materials like polyurethane foams (furniture, bedding, etc.).
• Evidence suggests a role for isocyanates and polyurethanes in non-occupational respiratory conditions.
• Dermal exposure is increasingly recognized as a significant factor in disease etiology.

Conclusions:

• Isocyanates in consumer products may contribute to the rise in asthma, especially in children.
• Urgent research is required to understand the links between isocyanates, polyurethanes, skin exposure, and non-occupational asthma.
• Environmental and dermal exposure pathways warrant further investigation for asthma prevention.