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 267.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 267.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 267.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 267.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 267.2 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\28515448
.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Sci+Rep
2017 ; 7
(1
): 2059
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Involvement Of Vascular Aldosterone Synthase In Phosphate-Induced Osteogenic
Transformation Of Vascular Smooth Muscle Cells
#MMPMID28515448
Alesutan I
; Voelkl J
; Feger M
; Kratschmar DV
; Castor T
; Mia S
; Sacherer M
; Viereck R
; Borst O
; Leibrock C
; Gawaz M
; Kuro-O M
; Pilz S
; Tomaschitz A
; Odermatt A
; Pieske B
; Wagner CA
; Lang F
Sci Rep
2017[May]; 7
(1
): 2059
PMID28515448
show ga
Vascular calcification resulting from hyperphosphatemia is a major determinant of
mortality in chronic kidney disease (CKD). Vascular calcification is driven by
aldosterone-sensitive osteogenic transformation of vascular smooth muscle cells
(VSMCs). We show that even in absence of exogenous aldosterone, silencing and
pharmacological inhibition (spironolactone, eplerenone) of the mineralocorticoid
receptor (MR) ameliorated phosphate-induced osteo-/chondrogenic transformation of
primary human aortic smooth muscle cells (HAoSMCs). High phosphate concentrations
up-regulated aldosterone synthase (CYP11B2) expression in HAoSMCs. Silencing and
deficiency of CYP11B2 in VSMCs ameliorated phosphate-induced osteogenic
reprogramming and calcification. Phosphate treatment was followed by nuclear
export of APEX1, a CYP11B2 transcriptional repressor. APEX1 silencing
up-regulated CYP11B2 expression and stimulated osteo-/chondrogenic
transformation. APEX1 overexpression blunted the phosphate-induced
osteo-/chondrogenic transformation and calcification of HAoSMCs. Cyp11b2
expression was higher in aortic tissue of hyperphosphatemic klotho-hypomorphic
(kl/kl) mice than in wild-type mice. In adrenalectomized kl/kl mice,
spironolactone treatment still significantly ameliorated aortic osteoinductive
reprogramming. Our findings suggest that VSMCs express aldosterone synthase,
which is up-regulated by phosphate-induced disruption of APEX1-dependent gene
suppression. Vascular CYP11B2 may contribute to stimulation of VSMCs
osteo-/chondrogenic transformation during hyperphosphatemia.