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Activation of peroxisome proliferator-activated receptor delta stimulates the proliferation of human breast and prostate cancer cell lines

In English

Författare

  • Ruth L Stephen
  • Mattias Gustafsson
  • Morag Jarvis
  • Roger Tatoud
  • Barry R Marshall
  • Deborah Knight
  • Ewa Ehrenborg
  • Adrian L Harris
  • C Roland Wolf
  • Colin N A Palmer

Summary, in English

The nuclear receptor peroxisome proliferator-activated receptor delta [PPARdelta/beta (NR1C2)] has been implicated in colorectal carcinogenesis by various molecular genetic observations. These observations have recently been supported by studies of activation of PPARdelta by pharmacological agents. Here we present the first report of the stimulation of breast and prostate cancer cell growth using PPARdelta selective agonists. Activation of PPARdelta with compound F stimulated proliferation in breast (T47D, MCF7) and prostate (LNCaP, PNT1A) cell lines, which are responsive to sex hormones. Conversely, we have found that several steroid-independent cell lines, including colon lines, were unresponsive to compound F. These findings were confirmed with an additional high-affinity PPARdelta agonist, GW501516. Conditional expression of PPARdelta in MCF7 Tet-On cells resulted in a doxycycline-enhanced response to GW501516, thus providing direct genetic evidence for the role of PPARdelta in the proliferative response to this drug. Activation of PPARdelta in T47D cells resulted in increased expression of the proliferation marker Cdk2 and also vascular endothelial growth factor alpha (VEGFalpha) and its receptor, FLT-1, thus, suggesting that PPARdelta may initiate an autocrine loop for cellular proliferation and possibly angiogenesis. Consistent with this hypothesis, we demonstrated a pro-proliferative effect of GW501516 on human umbilical vein endothelial cell cultures and found that GW501516 also regulated the expression of VEGFalpha and FLT-1 in these cells. Our observations provide the first evidence that activation of PPARdelta can result in increased growth in breast and prostate cancer cell lines and primary endothelial cells and supports the possibility that PPARdelta antagonists may be of therapeutic value in the treatment of breast and prostate cancer.

Publiceringsår

2004

Språk

Engelska

Sidor

3162-3170

Publikation/Tidskrift/Serie

Cancer Research

Volym

64

Issue

9

Dokumenttyp

Artikel i tidskrift

Förlag

American Association for Cancer Research Inc.

Ämne

  • Microbiology in the medical area
  • Immunology in the medical area

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 1538-7445