Immune Tolerance Clinical Trial
Official title:
Immunologic Profile of Children and Teenagers With Severe Allergy to Peanuts and Nuts After Induction of Tolerance: a Pilot Project
Many authors propose the strict avoidance of allergenic food as the only treatment for
children known to be allergic to certain food. However, it has been observed an increase of
the frequency and severity of the allergic accidents in these children in the long term.
Other teams have suggested treating these allergies (in particular peanut allergies) by
controlled and progressive reintroduction of the allergenic food. A good tolerance and a
prevention of allergic reactions consecutive to the ingestion of the same allergenic food
were observed. The immunological mechanisms of this type of treatment are not well known.
A decrease of specific IgE and an increase of IgG4 have been observed in the case of egg
allergies after this kind of treatment. Certain experiments realized in mice models testing
the allergenic stimulation challenge showed an increase of lymphocytes T regulators (foxp3+
, CD4+, CD25+), stimulated by dendritic cells, and also an increase of interleukin 10,
leading to the modification of the balance between Th1 and Th2.Our hypothesis is that after
treating allergies by the reintroduction of the allergenic food, the immunological mechanism
of acquisition of tolerance is associated to variations in populations of lymphocytes and in
the activation or decrease of pro and anti-inflammatory cytokines. This reaction will be
studied in two groups: 1. Children with a confirmed allergy to peanuts or nuts and 2.
Children without antecedents of allergy or familiar atopy.
n/a
Observational Model: Case Control, Time Perspective: Cross-Sectional
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