Total serum tryptase levels are higher in young infants
Wahib Belhocine1, Zouher Ibrahim, Véronique Grandné
1Assistance Publique-Hôpitaux de Marseille, Laboratoire d'Immunologie, Hôpital de La Conception, Marseille, France.
Summary
Serum tryptase levels are higher in infants under 3 months and decrease with age. Atopic status and clinical condition influence these levels, indicating mast cell involvement in infant immune responses.
Area of Science:
- Immunology
- Pediatrics
Background:
- Mast cells play a role in immune defense and allergic diseases.
- Serum tryptase levels reflect mast cell burden and activity.
- Limited data exists on serum tryptase levels in infants under one year.
Purpose of the Study:
- To define total serum tryptase levels in infants under one year of age.
- To investigate factors influencing serum tryptase levels in this population.
Main Methods:
- Measured total serum tryptase levels in 372 infants under 1 year.
- Included healthy non-atopic infants, atopic/allergic infants, and critically ill infants.
- Utilized ImmunoCAP assay for tryptase measurement.
Main Results:
- Serum tryptase levels were highest in infants under 3 months (6.12 ± 3.47 μg/l), decreasing to adult levels by 9-12 months (3.85 ± 1.8 μg/l).
- Atopic/allergic infants had significantly higher levels (14.20 ± 10.22 μg/l).
- Intensive care patients showed lower levels (4.12 ± 3.38 μg/l).
Conclusions:
- Serum tryptase levels are age-dependent in infants.
- Clinical condition and atopic status impact infant serum tryptase levels.
- Suggests mast cell involvement in infant immune responses.
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