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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Jpn+J+Cancer+Res
1996 ; 87
(1
): 68-77
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English Wikipedia
Heparin-binding epidermal growth factor-like growth factor: p91 activation
induction of plasminogen activator/inhibitor, and tubular morphogenesis in human
microvascular endothelial cells
#MMPMID8609052
Ushiro S
; Ono M
; Izumi H
; Kohno K
; Taniguchi N
; Higashiyama S
; Kuwano M
Jpn J Cancer Res
1996[Jan]; 87
(1
): 68-77
PMID8609052
show ga
Epidermal growth factor (EGF) or transforming growth factor-alpha (TGF-alpha)
stimulates cell migration, proliferation and the formation of tube-like
structures of human microvascular endothelial cells in culture. Heparin-binding
EGF-like growth factor(HB-EGF), which shows 35% homology with EGF/TGF-alpha, is a
member of the EGF family, and it is ubiquitous in many tissues and organs. We
examined whether or not HB-EGF induced angiogenic responses in human
microvascular endothelial cells. HB-EGF inhibited the binding of (125) I-EGF to
the EGF receptor and induced autophosphorylation of the receptor on endothelial
cells. Exogenous HB-EGF induced the loss of more than 70% of the EGF receptor
from the cell surface within 30 min, with similar kinetics to that of EGF. The
level of c-fos mRNA markedly increased at 30 min in response to HB-EGF as well as
EGF. A gel shift assay demonstrated the activation of the transcription factor
p91 by HB-EGF and EGF. This factor directly interacts with EGF receptor and
mediates the activation of c-fos gene promoter. HB-EGF enhanced the mRNA
expression of tissue-type plasminogen activator (t-PA) and plasminogen activator
inhibitor-1 (PAI-1) mRNA. However, the enhancement of t-PA and PAI-1 by HB-EGF
was less than that by EGF. Heparitinase/chlorate, which digests the heparan
sulfate proteoglycan of the endothelial cell surface, restored both t-PA and
PAI-1 mRNA levels in response to HB-EGF in a manner similar to that by EGF.
HB-EGF at 10 ng/ml developed tube-like structures in type I collagen gel at
similar levels to that of EGF at 10 ng/ml, suggesting that HB-EGF is also a
potent angiogenic factor in the model system for angiogenesis. The tubulogenesis
activity of HB-EGF is discussed in relation to the expression of the t-PA and
PAI-1 genes.