Anti-proliferative effects of calcitriol on endothelial cells derived from two different microenvironments

Ivy Chung, Wei Dong Yu, Adam R. Karpf, Geraldine Flynn, Ronald J. Bernardi, Ruth A. Modzelewski, Candace S. Johnson, Donald L. Trump

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Calcitriol (1,25-dihydroxycholecalciferol), the active form of Vitamin D, is anti-proliferative in tumor cells and tumor-derived endothelial cells (TDEC). However, endothelial cells isolated from normal tissues as cell lines or freshly isolated cells or from implanted Matrigel plugs (MDEC) are relatively resistant. Both TDEC and MDEC express similar amounts of Vitamin D receptor (VDR) protein. Although the VDR from TDEC has higher binding affinity for calcitriol than those from MDEC, VDR in both cell types translocates to the nucleus and transactivates the 24-hydroxylase promoter-luciferase construct. Calcitriol selectively inhibits the growth of TDEC but not MDEC by inducing G0/G1 cell cycle arrest and by promoting apoptosis. This selectivity appears to be related to 24-hydroxylase (CYP24) expression. Calcitriol significantly induced CYP24 expression in MDEC but not in TDEC and inhibition of CYP24 activity in MDEC restores their sensitivity to calcitriol. These findings indicate that the induction of CYP24 expression differs in endothelial cells isolated from different microenvironments (TDEC versus MDEC) and that this distinction contributes to selective calcitriol-mediated growth inhibition in these cell types.

Original languageEnglish (US)
Pages (from-to)768-770
Number of pages3
JournalJournal of Steroid Biochemistry and Molecular Biology
Volume103
Issue number3-5
DOIs
StatePublished - Mar 1 2007

Fingerprint

Calcitriol
Endothelial cells
Endothelial Cells
Tumors
Calcitriol Receptors
Neoplasms
Cells
Mixed Function Oxygenases
G1 Phase Cell Cycle Checkpoints
Tumor Microenvironment
Growth
Luciferases
Vitamin D
Tissue
Apoptosis
Cell Line

Keywords

  • 24-Hydroxylase
  • Calcitriol
  • Matrigel-derived endothelial cells
  • Tumor-derived endothelial cells
  • VDR

ASJC Scopus subject areas

  • Endocrinology, Diabetes and Metabolism
  • Biochemistry
  • Molecular Medicine
  • Molecular Biology
  • Endocrinology
  • Clinical Biochemistry
  • Cell Biology

Cite this

Anti-proliferative effects of calcitriol on endothelial cells derived from two different microenvironments. / Chung, Ivy; Yu, Wei Dong; Karpf, Adam R.; Flynn, Geraldine; Bernardi, Ronald J.; Modzelewski, Ruth A.; Johnson, Candace S.; Trump, Donald L.

In: Journal of Steroid Biochemistry and Molecular Biology, Vol. 103, No. 3-5, 01.03.2007, p. 768-770.

Research output: Contribution to journalArticle

Chung, Ivy ; Yu, Wei Dong ; Karpf, Adam R. ; Flynn, Geraldine ; Bernardi, Ronald J. ; Modzelewski, Ruth A. ; Johnson, Candace S. ; Trump, Donald L. / Anti-proliferative effects of calcitriol on endothelial cells derived from two different microenvironments. In: Journal of Steroid Biochemistry and Molecular Biology. 2007 ; Vol. 103, No. 3-5. pp. 768-770.
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