Since invasion is dependent on extracellular matrix remodeling capabilities, this inhibitory effect strongly suggested that the two key extracellular membrane remodeling enzymes expressed by endothelial cells, namely, MMP - 2 and uPA could be other main key targets of the pharmacological action of
kahweol on endothelial cells.
Figure 6 shows the effects of 75 µM
kahweol on endothelial cell migration, as determined by the «wound healing» assay, after 8 and 24 h of treatment.
Therefore, it would be advisable to test the potential effects of
kahweol on endothelial cell apoptosis.
We also demonstrate the inhibitory effect of
kahweol on the endothelial cell potential to remodel extracellular matrix by targeting two key molecules involved in the process, MMP - 2 and uPA.
Data obtained on the effects of
kahweol on endothelial cell invasion (as determined by a continuous fluorescent assay) clearly show that kahweol induces an anti-invasive effect in HUVEC in a dose - dependent manner (Figure 7).
Not exact matches
Therefore, we studied the effects of
kahweol on the growth of
endothelial cells.
Different in vitro assays were carried out in order to test the specific effects of
kahweol treatment
on several key steps of the angiogenic process in both
endothelial and tumor
cells.
This effect
on cell survival was not
endothelial cell - specific, since IC50 values for
kahweol treatment of several human tumoral
cell lines were similar to those obtained for HUVEC (results not shown).
We show for the first time that
kahweol is an anti-angiogenic compound with inhibitory effects in two in vivo and one ex vivo angiogenesis models, with effects
on specific steps of the angiogenic process:
endothelial cell proliferation, migration, invasion and tube formation
on Matrigel.