We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
The fungicide ciclopirox inhibits lymphatic endothelial cell tube formation by suppressing VEGFR-3-mediated ERK signaling pathway.
- Authors
Luo, Y; Zhou, H; Liu, L; Shen, T; Chen, W; Xu, B; Han, X; Zhang, F; Scott, R S; Alexander, J S; Alam, A; Huang, S
- Abstract
Ciclopirox olamine (CPX), an off-patent antifungal agent used to treat mycoses of skin and nails, has recently been demonstrated to be a potential anticancer agent. However, the underlying mechanism is not well understood. Here, for the first time, we show that CPX inhibited lymphangiogenesis in an in vitro model (tube formation). This effect was, in part, associated with inhibition of vascular endothelial growth factor receptor-3 (VEGFR-3) expression, as overexpression of VEGFR-3 conferred partial resistance to CPX inhibitory effect on tube formation in lymphatic endothelial cells (LECs), whereas downregulation of VEGFR-3 mimicked the effect of CPX, blocking the tube formation. Further study revealed that CPX did not alter mRNA level, but inhibited protein synthesis and promoted protein degradation of VEGFR-3. In addition, we found that CPX inhibited phosphorylation of the extracellular signal-related kinase 1/2 (ERK1/2), a downstream effector of VEGFR-3. Overexpression of VEGFR-3 attenuated CPX inhibition of ERK1/2 phosphorylation, whereas downregulation of VEGFR-3 inhibited ERK1/2 phosphorylation in LECs. Ectopic expression of constitutively active mitogen-activated protein kinase kinase 1 (MKK1) resulted in activation of ERK1/2 and partially prevented CPX inhibition of LEC tube formation. The results suggest that CPX inhibits LEC tube formation at least, in part, through inhibiting VEGFR-3-mediated ERK signaling pathway.
- Subjects
FUNGICIDES; CICLOPIROX; EPITHELIAL cells; VASCULAR endothelial growth factors; PROTEIN kinases; PHOSPHORYLATION; GENE expression
- Publication
Oncogene, 2011, Vol 30, Issue 18, p2098
- ISSN
0950-9232
- Publication type
Article
- DOI
10.1038/onc.2010.590