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2016 ; 7
(42
): 68194-68205
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
The antiangiogenic effects of polyisoprenylated cysteinyl amide inhibitors in
HUVEC, chick embryo and zebrafish is dependent on the polyisoprenyl moiety
#MMPMID27626690
Nkembo AT
; Ntantie E
; Salako OO
; Amissah F
; Poku RA
; Latinwo LM
; Lamango NS
Oncotarget
2016[Oct]; 7
(42
): 68194-68205
PMID27626690
show ga
Angiogenesis is essential for solid tumor growth, therapeutic resistance and
metastasis, the latest accounting for 90% of cancer deaths. Although angiogenesis
is essential for the malignant transformations in solid tumors and therefore is
an attractive target, few drugs are available that block tumor angiogenesis. The
focus has been to block signaling by receptor tyrosine kinases (RTKs), such as
for vascular endothelial growth factor (VEGF), whose activation abrogate
apoptosis and promote angiogenesis. The polyisoprenylated cysteinyl amide
inhibitors (PCAIs) were designed to modulate aberrant polyisoprenylated small
G-proteins such as mutant Ras whose constitutive activation promotes RTKs
signaling. Since polyisoprenylation is essential for protein-protein interactions
and functions of G-proteins, we hypothesized that the PCAIs would disrupt the
monomeric G-protein signaling thereby effectively inhibiting angiogenesis. In
this study we determined the effects of PCAIs on human umbilical vein endothelial
cells (HUVEC) tube formation, cell viability, cell migration and invasion as well
as in vivo using the chick chorioallantoic membrane (CAM) and zebrafish models.
At sub- to low micromolar concentrations, the PCAIs inhibit the native and
VEGF-stimulated cell migration and invasion as well as tube formation and
angiogenesis in CAM and zebrafish embryos. The concentrations that block the
angiogenic processes were lower than those that induce cell death. Since
angiogenesis is essential for tumor growth but otherwise limited to wound
healing, feeding fat cells and uterine wall repair in adults, it is conceivable
that these compounds can be developed into safer therapeutics for cancers and
retinal neovascularization that leads to loss of vision.