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2015 ; 24
(10
): 2041-53
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Intrarenal Delivery of Mesenchymal Stem Cells and Endothelial Progenitor Cells
Attenuates Hypertensive Cardiomyopathy in Experimental Renovascular Hypertension
#MMPMID25420012
Eirin A
; Zhu XY
; Ebrahimi B
; Krier JD
; Riester SM
; van Wijnen AJ
; Lerman A
; Lerman LO
Cell Transplant
2015[]; 24
(10
): 2041-53
PMID25420012
show ga
Renovascular hypertension (RVH) leads to left ventricular (LV) hypertrophy and
diastolic dysfunction, associated with increased cardiovascular mortality.
Intrarenal delivery of endothelial progenitor cells (EPCs) and mesenchymal stem
cells (MSCs) improves kidney function in porcine RVH, and the potent
anti-inflammatory properties of MSCs may serve to blunt inflammatory mediators in
the cardiorenal axis. However, their relative efficacy in attenuating cardiac
injury and dysfunction remains unknown. This study tested the hypothesis that the
cardioprotective effect of EPCs and MSCs delivered into the stenotic kidney in
experimental RVH are comparable. Pigs (n?=?7 per group) were studied after 10
weeks of RVH or control untreated or treated with a single intrarenal infusion of
autologous EPCs or MSCs 4 weeks earlier. Cardiac and renal function (fast CT) and
stenotic kidney release of inflammatory mediators (ELISA) were assessed in vivo,
and myocardial inflammation, remodeling, and fibrosis ex vivo. After 10 weeks of
RVH, blood pressure was not altered in cell-treated groups, yet stenotic kidney
glomerular filtration rate (GFR), blunted in RVH, improved in RVH?+?EPC, and
normalized in RVH?+?MSCs. Stenotic kidney release of monocyte chemoattractant
protein (MCP)-1 and its myocardial expression were elevated in RVH?+?EPC, but
normalized only in RVH?+?MSC pigs. RVH-induced LV hypertrophy was normalized in
both EPC- and MSC-treated pigs, while diastolic function (E/A ratio) was restored
to normal levels exclusively in RVH?+?MSCs. RVH-induced myocardial fibrosis and
collagen deposition decreased in RVH?+?EPCs but further decreased in
RVH?+?MSC-treated pigs. Intrarenal delivery of EPCs or MSCs attenuates
RVH-induced myocardial injury, yet MSCs restore diastolic function more
effectively than EPCs, possibly by greater improvement in renal function or
reduction of MCP-1 release from the stenotic kidney. These observations suggest a
therapeutic potential for EPCs and MSCs in preserving the myocardium in chronic
experimental RVH.