Warning: file_get_contents(https://eutils.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&id=25673808
&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 233.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 233.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 233.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 233.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 233.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 233.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 233.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 233.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 233.6 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\25673808
.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Am+J+Physiol+Renal+Physiol
2015 ; 308
(8
): F932-7
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Unilateral ureteral obstruction attenuates intrarenal angiotensin II generation
induced by podocyte injury
#MMPMID25673808
Okabe M
; Miyazaki Y
; Niimura F
; Pastan I
; Nishiyama A
; Yokoo T
; Ichikawa I
; Matsusaka T
Am J Physiol Renal Physiol
2015[Apr]; 308
(8
): F932-7
PMID25673808
show ga
The renal tissue renin-angiotensin system is activated in chronic kidney
diseases. We previously demonstrated that intrarenal ANG II is synthesized
primarily from liver-derived angiotensinogen filtered through the glomerulus and
that podocyte injury increases the passage of angiotensinogen into the tubular
lumen and generation of ANG II. In the present study, we tested the effect of
cessation of glomerular filtration by ureteral obstruction on renal ANG II
generation in kidneys with podocyte injury under two experimental conditions.
Ureteral obstruction is known to activate the renin-angiotensin system in
nonproteinuric kidneys. Transgenic mice expressing hCD25 in podocyte (NEP25) were
injected with 1.25 or 10 ng/g body wt of LMB2, a hCD25-targeted immunotoxin,
subjected to unilateral ureteral ligation on the following day, and euthanized 7
and 4 days later, respectively. In both experiments, compared with the kidney in
untreated wild-type mice, renal angiotensinogen protein, as assessed by
immunostaining and Western blot analysis, was increased in the contralateral
unobstructed kidney. However, it was markedly decreased in the obstructed kidney.
Whereas intrarenal ANG II content was increased in the contralateral kidney
compared with the untreated kidney (248 ± 83 vs. 106 ± 21 and 298 ± 185 vs. 64.8
± 20 fmol/g kidney, respectively), this increase was suppressed in the obstructed
kidney (161 ± 75 and 113 ± 34 fmol/g kidney, respectively), a pattern opposite to
what we expected in obstructed kidneys without podocyte injury. Thus, our study
indicates that the major source of increased renal ANG II in podocyte injury is
filtered angiotensinogen.