A prospective study of Fel d1 and Der p1 exposure in infancy and childhood wheezing

Area of Science:

• Environmental Health
• Pediatric Allergy
• Epidemiology

Background:

• Wheezing in early childhood is a common respiratory issue with diverse causes.
• Domestic allergen exposure, specifically to cat allergen (Fel d1) and house dust mite (Der p1), is a potential environmental risk factor.
• Understanding the age-specific impact of these allergens is crucial for early intervention.

Purpose of the Study:

• To investigate the impact of domestic cat allergen (Fel d1) and house dust mite (Der p1) exposure on wheezing from birth to 4 years.
• To identify distinct risk profiles for wheezing at different ages.
• To explore interactions between allergen exposure and maternal asthma.

Main Methods:

• A multicenter prospective birth cohort study involving 1,611 mothers recruited before delivery.
• Dust sample collection in children's homes during their first year to assess allergen levels (Fel d1, Der p1).
• Longitudinal follow-up of 1,289 children for wheezing status over 4 years.

Main Results:

• House dust mite (Der p1) exposure showed no correlation with wheezing outcomes.
• Cat allergen (Fel d1) exposure significantly increased wheezing risk in 3- and 4-year-olds compared to 1-year-olds.
• An interaction between Fel d1 exposure and maternal asthma was observed for wheezing in Year 4 (RR = 2.77).

Conclusions:

• Wheezing in young children exhibits distinct patterns with varying risk profiles.
• Domestic cat allergen (Fel d1) exposure is a significant risk factor for wheezing, with effects varying by age.
• Maternal asthma status modifies the impact of cat allergen exposure on wheezing in children.