Warning: file_get_contents(https://eutils.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&id=29462885
&cmd=llinks): Failed to open stream: HTTP request failed! HTTP/1.1 429 Too Many Requests
in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 215
Deprecated: Implicit conversion from float 217.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 217.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 217.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 217.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 217.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 217.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 217.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 251.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 251.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 251.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 251.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Warning: imagejpeg(C:\Inetpub\vhosts\kidney.de\httpdocs\phplern\29462885
.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Int+J+Mol+Sci
2018 ; 19
(2
): ä Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Hypoxia Activates Src and Promotes Endocytosis Which Decreases MMP-2 Activity and
Aggravates Renal Interstitial Fibrosis
#MMPMID29462885
Cheng Z
; Liu L
; Wang Z
; Cai Y
; Xu Q
; Chen P
Int J Mol Sci
2018[Feb]; 19
(2
): ä PMID29462885
show ga
The aggravation of renal interstitial fibrosis in the advanced-stage of chronic
kidney disease is related to decreased matrix metalloproteinase-2 (MMP-2)
activity, which is induced by hypoxia in the kidney; however, the specific
mechanism remains unclear. We previously demonstrated that inhibition of
Caveolin-1, a key gene involved in endocytosis, increased MMP-2 activity in
hypoxic HK-2 cells. It has been reported that activated Src (phospho-Src Tyr416)
is a key molecule in multiple fibrotic pathways. However, whether Src functions
on the regulation of Caveolin-1 and MMP-2 activity in hypoxic HK-2 cells remains
poorly understood. To explore the underlying mechanism, a rat model of renal
interstitial fibrosis was established, then we observed obvious hypoxia in
fibrotic kidney tissue and the protein levels of phospho-Src and Caveolin-1
increased, while MMP-2 activity decreased. Next, we treated HK-2 cells with the
phospho-Src inhibitor PP1. Compared with normal cells grown in hypoxia, in cells
treated with PP1, the protein levels of phospho-Src and Caveolin-1 decreased, as
did the protein levels of the MMP-2-activity-regulated molecules RECK
(reversion-inducing-cysteine-rich protein with kazal motifs) and TIMP-2 (tissue
inhibitor of metalloproteinase-2), while the protein level of MT1-MMP (membrane
type 1-matrix metalloproteinase) increased and MMP-2 activity was enhanced.
Therefore, hypoxia promotes the phosphorylation of Src and phospho-Src can
enhance the endocytosis of HK-2 cells, which leads to decreased MMP-2 activity
and aggravates renal interstitial fibrosis.