title: Peroxisome proliferator-activated receptor γ agonist suppresses human telomerase reverse transcriptase expression and aromatase activity in eutopic endometrial stromal cells from endometriosis.
abstract: OBJECTIVE
  To investigate the effect of peroxisome proliferator activated receptor γ (PPARγ) agonist on the cell proliferation properties and expression of human telomerase reverse transcriptase (hTERT) and aromatase in cultured endometrial stromal cell (ESC) from patients with endometriosis.
  
  
  METHODS
  Human endometrial tissues were obtained from women with endometriosis and healthy women (controls) using endometrial biopsy. Isolated ESCs were cultured and the cell proliferation was measured by 3-[4,5-dimethylthiazol-2-yl]-2,5 diphenyl tetrazolium bromide assay and expression of hTERT, aromatase, and cyclooxygenase (COX)-2 by western blotting according to the addition of rosiglitazone (PPARγ agonist).
  
  
  RESULTS
  We demonstrate that the cultured ESCs of endometriosis showed hTERT protein overexpression and increased cellular proliferation, which was inhibited by rosiglitazone, in a dose-dependent manner. At the same time, PPARγ agonist also inhibited aromatase and COX-2 expression, resulting in decreased prostaglandin E2 production in the ESCs of endometriosis.
  
  
  CONCLUSIONS
  This study suggests that PPARγ agonist plays an inhibitory role in the proliferative properties of eutopic endometrium with endometriosis by down-regulation of hTERT and COX-2 expression; this could be a new treatment target for endometriosis.
authors.affiliation: Health Promotion Center, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea.
authors.forename: Hye Jin
authors.initials: HJ
authors.lastname: Chang
authors.forename: Jae Hoon
authors.initials: JH
authors.lastname: Lee
authors.forename: Kyung Joo
authors.initials: KJ
authors.lastname: Hwang
authors.forename: Mi Ran
authors.initials: MR
authors.lastname: Kim
authors.forename: Jung Hyun
authors.initials: JH
authors.lastname: Yoo
keywords: Aromatase; Endometriosis; Endometrium; Human telomerase reverse transcriptase; Peroxisome proliferator activated receptor γ; Rosiglitazone