Of note, there was no relationship between
cell restoration and the degree of bronchial hyperresponsiveness
(31). Immunostaining for growth factors such as granulocyte
macrophage colony-stimulating factor (GM-CSF) was signifi-
cantly decreased on epithelial cells after a 3-month treatment
with 1,000 g of beclomethasone sulfate, compared with the initial expression (34).