Surfactant Protein A Suppresses Progression Of Human Lung Adenocarcinoma In An Experimental Lung Metastasis Model

2012 ◽  
Author(s):  
Hisatsugu Goto ◽  
Atsushi Mitsuhashi ◽  
Takuya Kuramoto ◽  
Masaki Hanibuchi ◽  
Soji Kakiuchi ◽  
...  
Keyword(s):  
Lung Adenocarcinoma ◽  
Lung Metastasis ◽  
Human Lung ◽  
Protein A ◽  
Surfactant Protein ◽  
Surfactant Protein A ◽  
Human Lung Adenocarcinoma ◽  
Metastasis Model

Intracellular and Intraalveolar Localization of Surfactant Protein A (SP-A) in the Parenchymal Region of the Human Lung

2002 ◽  
Vol 26 (1) ◽  
pp. 91-98 ◽  
Author(s):  
Matthias Ochs ◽  
Georg Johnen ◽  
Klaus-Michael Müller ◽  
Thorsten Wahlers ◽  
Samuel Hawgood ◽  
...  
Keyword(s):  
Human Lung ◽  
Protein A ◽  
Surfactant Protein ◽  
Surfactant Protein A

11β-Hydroxysteroid dehydrogenase type 2 and the regulation of surfactant protein A by dexamethasone metabolites

2006 ◽  
Vol 290 (4) ◽  
pp. E653-E660 ◽  
Author(s):  
Mark R. Garbrecht ◽  
Thomas J. Schmidt ◽  
Zygmunt S. Krozowski ◽  
Jeanne M. Snyder
Keyword(s):  
Human Lung ◽  
Protein A ◽  
Fetal Lung ◽  
Hydroxysteroid Dehydrogenase ◽  
Surfactant Protein ◽  
Biologically Active ◽  
Surfactant Protein A ◽  
Human Adult ◽  
Sensitive Organ ◽  
Lung Epithelial

Glucocorticoid (GC) metabolism by the 11β-hydroxysteroid dehydrogenase (HSD) system is an important prereceptor regulator of GC action. The HSD enzymes catalyze the interconversion of the endogenous, biologically active GC cortisol and its inactive 11-dehydro metabolite cortisone. The role of the HSD enzymes in the metabolism of synthetic GCs, such as dexamethasone (Dex), is more complex. The human lung is a classic GC-sensitive organ; however, the roles of the HSD enzymes (HSD1 and HSD2) in the human lung are poorly understood. In the present study, we examined the expression of the HSD enzymes in human adult and fetal lung tissues and the human lung epithelial cell line NCI-H441. We observed that human adult and fetal lung tissues, as well as H441 cells, express HSD2 protein and that it is upregulated by Dex (10−7 M). By contrast, HSD1 protein was undetectable. We also show that the Dex-mediated regulation of surfactant protein A is attenuated by inhibition of HSD2 activity. Furthermore, we demonstrate that unlike the inactive, 11-dehydro metabolite of cortisol (i.e., cortisone), the 11-dehydro metabolite of Dex, 11-dehydro-Dex, competes for binding to the GC receptor (GR) in human lung epithelial cells and retains GR agonist activity. Together, these data suggest that differences exist in the biological activities of the metabolites of cortisol and Dex.

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