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Polycyclic aromatic hydrocarbons and childhood asthma
Parisa Karimi1, Kamau O Peters, Katayoon Bidad
1Program in Occupational and Environmental Health, Department of Environmental Health Sciences, Johns Hopkins Bloomberg School of Public Health, 615 North Wolfe Street, Room E7535, Baltimore, MD, USA.
Insights
Childhood asthma is a growing concern, linked to factors like tobacco smoke and urban living. New research explores how polycyclic aromatic hydrocarbons (PAHs) from pollution may increase asthma risk and severity in children.
Area of Science:
- Environmental Health
- Pediatric Medicine
- Respiratory Medicine
Background:
- Asthma is a prevalent chronic childhood illness, causing significant hospitalizations and school absences.
- Increasing asthma prevalence shows disparities across demographics and geographic locations.
- Known risk factors include genetics, allergies, environmental exposures like tobacco smoke, and lifestyle factors.
Purpose of the Study:
- To review the sources of childhood exposure to polycyclic aromatic hydrocarbons (PAHs).
- To examine the association between airborne PAH exposure and childhood asthma prevalence.
- To investigate the link between PAH exposure and asthma exacerbation in children.
Main Methods:
- Literature review of studies on childhood asthma and PAH exposure.
- Analysis of data linking environmental PAH sources to asthma incidence.
- Examination of research on PAH exposure and asthma symptom severity.
Main Results:
- Polycyclic aromatic hydrocarbons (PAHs), common in air pollution, are increasingly linked to asthma onset.
- Airborne PAH exposure is associated with higher rates of childhood asthma.
- PAH exposure correlates with increased frequency and severity of asthma exacerbations in children.
Conclusions:
- Childhood asthma is a complex condition influenced by various factors, including environmental pollutants.
- Exposure to polycyclic aromatic hydrocarbons (PAHs) represents a significant environmental risk factor for childhood asthma.
- Further research is warranted to understand and mitigate the impact of PAHs on pediatric respiratory health.
Abstract:
Asthma is the most common chronic illness in children living in developed countries and the leading cause of childhood hospitalization and school absenteeism. Prevalence rates of asthma are increasing and show disparities across gender, geographic regions, and ethnic/racial groups. Common risk factors for developing childhood asthma include exposure to tobacco smoke, previous allergic reactions, a family history of asthma, allergic rhinitis or eczema, living in an urban environment, obesity and lack of physical exercise, severe lower respiratory tract infections, and male gender. Asthma exacerbation in children can be triggered by a variety of factors, including allergens (e.g., pollen, dust mites, and animal dander), viral and bacterial infections, exercise, and exposure to airway irritants. Recent studies have shown that exposure to polycyclic aromatic hydrocarbons (PAHs), a major component of fine particulate matter from combustion sources, is also associated with onset of asthma, and increasing asthmatic symptoms. In this paper, we review sources of childhood PAH exposure and the association between airborne PAH exposure and childhood asthma prevalence and exacerbation.
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