title: High-dose glucocorticoids increases the expression of mineralocorticoid receptor in vascular endothelial cells.
abstract: OBJECTIVE
  To explore the role of glucocorticoid new mechanism to observe the expression of glucocorticoid receptor (GR) and mineralocorticoid receptor (MR) with lipopolysaccharide (LPS) and dexamethasone (Dex) in human umbilical vein endothelial cells (HUVEC).
  
  
  METHODS
  LPS "injured" endothelial cells with Dex for "treatment", and then detected the expression of glucocorticoid receptor (GR) and mineralocorticoid receptor (MR) in the endothelial cells by RT-PCR and immunohistochemistry.
  
  
  RESULTS
  With high dose (10-6 mol/L) of Dex to stimulate cell 3h, GRmRNA no significant changes in the expression, 6h began to decrease, 12h peak, 24h recovered nearly the level before stimulation. Using different concentrations of Dex and 100 ng/ml LPS stimulation, HUVEC MRmRNA expression was decreased, and high dose (10-6 mol/L) of Dex to stimulate cell 3h, MRmRNA no significant changes in expression, and GRmRNA The difference is that the expression began to increase 6h, 12h, peaked, 24h rebound near the level before stimulation. Immunohistochemistry results consistent with the RT-PCR.
  
  
  CONCLUSIONS
  Large dose of DEX (10-6 mol/l) up-regulated the expression of MR and GR in the reduction of the contrast exactly. GC induced the expression of GR and MR in different changes of stress injury of the body may be a regulatory mechanism, and indicate one new mechanism of glucocorticoid exist.
authors.affiliation: Department of Respiratory Medicine, General Hospital of Beijing Military Region, Beijing, China. wxy_med@163.com.
authors.forename: X Y
authors.initials: XY
authors.lastname: Wang
authors.forename: X L
authors.initials: XL
authors.lastname: Chen
authors.forename: L
authors.initials: L
authors.lastname: Wang
authors.forename: H W
authors.initials: HW
authors.lastname: Chen
mesh_terms: D003907:Dexamethasone / Q000008:administration & dosage; D004305:Dose-Response Relationship, Drug; D042783:Endothelial Cells / Q000187:drug effects* / Q000378:metabolism*; D005786:Gene Expression Regulation; D005938:Glucocorticoids / Q000008:administration & dosage*; D061307:Human Umbilical Vein Endothelial Cells / Q000187:drug effects / Q000378:metabolism; D006801:Humans; D008070:Lipopolysaccharides / Q000633:toxicity; D011965:Receptors, Glucocorticoid / Q000819:agonists / Q000096:biosynthesis; D018161:Receptors, Mineralocorticoid / Q000819:agonists* / Q000096:biosynthesis*; D015854:Up-Regulation / Q000187:drug effects
chemical_list: D005938:Glucocorticoids; D008070:Lipopolysaccharides; D011965:Receptors, Glucocorticoid; D018161:Receptors, Mineralocorticoid; D003907:Dexamethasone