Total glucosides of Paeonia lactiflora Pall inhibit vascular endothelial growth factor-induced angiogenesis.
OBJECTIVE
To evaluate the anti-angiogenesis effect of total glucosides of Paeonia lactiflora Pall.


METHODS
In this study, we determined the effect of TGP on the proliferation of human vascular endothelial cells through 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay and fluorescence-activated cell sorting analysis. A migration assay and a tube formation assay were used to investigate the migration properties and tube formation abilities of human vascular endothelial cells after being treated with TGP. Furthermore, the in vivo anti-angiogenic ability of TGP was determined through a chick chorioallantoic membrane assay.


RESULTS
TGP (12.5, 62.5, and 312.5 microg/ml) resulted in a dose-dependent reduction in the proliferation of endothelial cells. This inhibition effect began 6h after treatment and lasted at least 24h. Fluorescence-activated cell sorting analysis data showed an accumulation of cells in the G0/G1 phase of the cell cycle, which exhibited apoptotic features indicative of cell death. The migration properties and tube forming abilities of endothelial cells were dramatically inhibited by the TGP extract.


CONCLUSIONS
Our results show that TGP can inhibit angiogenesis in vitro and in vivo.
Deng
Hui
H
Department of Dermatology, The Sixth People's Hospital of Shanghai, Shanghai Jiaotong University, Shanghai, China.
Yan
Chunlin
C
Xiao
Tian
T
Yuan
Dingfen
D
Xu
Jinhua
J
D020533:Angiogenesis Inhibitors / Q000494:pharmacology*; D017209:Apoptosis / Q000187:drug effects; D002453:Cell Cycle; D049109:Cell Proliferation / Q000187:drug effects; D004305:Dose-Response Relationship, Drug; D042783:Endothelial Cells / Q000187:drug effects*; D004730:Endothelium, Vascular / Q000187:drug effects; D005960:Glucosides / Q000494:pharmacology*; D006801:Humans; D018919:Neovascularization, Physiologic / Q000187:drug effects*; D029596:Paeonia / Q000737:chemistry*; D010936:Plant Extracts / Q000494:pharmacology*; D018517:Plant Roots; D042442:Vascular Endothelial Growth Factors / Q000378:metabolism*
D020533:Angiogenesis Inhibitors; D005960:Glucosides; D010936:Plant Extracts; D042442:Vascular Endothelial Growth Factors