Deprecated: Implicit conversion from float 229.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 229.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 229.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 229.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 229.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 229.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 229.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 229.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 263.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 263.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 263.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 263.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 263.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 263.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 263.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 296.79999999999995 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 296.79999999999995 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\28369848
.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 J+Cell+Physiol
2017 ; 232
(11
): 2985-2995
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
End stage renal disease-induced hypercalcemia may promote aortic valve
calcification via Annexin VI enrichment of valve interstitial cell derived-matrix
vesicles
#MMPMID28369848
Cui L
; Rashdan NA
; Zhu D
; Milne EM
; Ajuh P
; Milne G
; Helfrich MH
; Lim K
; Prasad S
; Lerman DA
; Vesey AT
; Dweck MR
; Jenkins WS
; Newby DE
; Farquharson C
; Macrae VE
J Cell Physiol
2017[Nov]; 232
(11
): 2985-2995
PMID28369848
show ga
Patients with end-stage renal disease (ESRD) have elevated circulating calcium
(Ca) and phosphate (Pi), and exhibit accelerated progression of calcific aortic
valve disease (CAVD). We hypothesized that matrix vesicles (MVs) initiate the
calcification process in CAVD. Ca induced rat valve interstitial cells (VICs)
calcification at 4.5?mM (16.4-fold; p?0.05) whereas Pi treatment alone had no
effect. Ca (2.7?mM) and Pi (2.5?mM) synergistically induced calcium deposition
(10.8-fold; p?0.001) in VICs. Ca treatment increased the mRNA of the osteogenic
markers Msx2, Runx2, and Alpl (p?0.01). MVs were harvested by
ultracentrifugation from VICs cultured with control or calcification media
(containing 2.7?mM Ca and 2.5?mM Pi) for 16?hr. Proteomics analysis revealed the
marked enrichment of exosomal proteins, including CD9, CD63, LAMP-1, and LAMP-2
and a concomitant up-regulation of the Annexin family of calcium-binding
proteins. Of particular note Annexin VI was shown to be enriched in calcifying
VIC-derived MVs (51.9-fold; p?0.05). Through bioinformatic analysis using
Ingenuity Pathway Analysis (IPA), the up-regulation of canonical signaling
pathways relevant to cardiovascular function were identified in calcifying
VIC-derived MVs, including aldosterone, Rho kinase, and metal binding. Further
studies using human calcified valve tissue revealed the co-localization of
Annexin VI with areas of MVs in the extracellular matrix by transmission electron
microscopy (TEM). Together these findings highlight a critical role for
VIC-derived MVs in CAVD. Furthermore, we identify calcium as a key driver of
aortic valve calcification, which may directly underpin the increased
susceptibility of ESRD patients to accelerated development of CAVD.