1. Quelle est l'origine principale des mastocytes dans l'organisme ?
2. Quelle est la principale origine des mastocytes selon la fiche de révision ?
3. Quel récepteur est le principal médiateur de l'activation des mastocytes lors des réactions allergiques ?
Origine des mastocytes
Cellules souches CD34+ dans la moelle
Mastocytes — rôle principal?
Défense contre parasites, bactéries, venins; immunotolerance.
Différenciation des mastocytes
GATA-1, MITF, influence SCF
Activation du mastocyte — principal récepteur?
FcεRI pour IgE.
Récepteur principal
FcεRI, haute affinité pour IgE
Médiateurs rapides — exemples?
Histamine, tryptase, héparine.
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