Type I – Immediate or Allergic - 2
•
Mechanism of tissue damage: - cont
=
d
•
U
in subsequent allergen exposure the allergen binds with IgE
on sensitized mast cells
•
allergen must bind to 2 or more
IgE molecules before mast
cell will secrete mediators:
•
eosinophil chemotactic factor
•
histamine
•
prostaglandins
•
Sensitized mast cell