Budesonide-dependent modulation of expression of macrophage migration inhibitory factor in a polyposis model: evidence for differential regulation in surface and glandular epithelia.
Macrophage migration inhibitory factor (MIF) is a counterregulatory lymphokine for glucocorticoid action within the immune system. To provide further insights into the way expression of pleiotropically acting MIF is modulated by glucocorticoids, we investigated the influence of the glucocorticoid budesonide on the level of expression of MIF in a model of human nasal polyposis by quantitative immunohistochemical analysis. Ten nasal polyps obtained from surgical resection were maintained for 24 hours in the presence of 3 budesonide concentrations: 10, 50, and 250 ng/mL. As quantitatively demonstrated by computer-assisted microscopy, 50 ng/mL induced an increase in MIF expression in the surface epithelium and a decrease in MIF expression in the glandular epithelium. At the 250 ng/mL dose, the inverse effect was induced. Evidently, surface and glandular epithelia react nonuniformly to the glucocorticoid regarding MIF presence, adding dependence on the cell type to the regulatory network.
Department of Otolaryngology-Head and Neck Surgery, Erasmus University Hospital, Brussels, Belgium.
Carine
C
Delbrouck
Hans-Joachim
HJ
Gabius
Guy
G
Vandenhoven
Robert
R
Kiss
Sergio
S
Hassid
D000893:Anti-Inflammatory Agents / Q000008:administration & dosage / Q000494:pharmacology / Q000627:therapeutic use*; D019819:Budesonide / Q000008:administration & dosage / Q000494:pharmacology / Q000627:therapeutic use*; D003238:Connective Tissue / Q000187:drug effects / Q000378:metabolism; D006801:Humans; D007150:Immunohistochemistry; D008263:Macrophage Migration-Inhibitory Factors / Q000378:metabolism*; D009298:Nasal Polyps / Q000188:drug therapy / Q000378:metabolism / Q000473:pathology; D020545:Respiratory Mucosa / Q000187:drug effects* / Q000378:metabolism* / Q000473:pathology
D000893:Anti-Inflammatory Agents; D008263:Macrophage Migration-Inhibitory Factors; D019819:Budesonide