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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Sci+Rep
2016 ; 6
(ä): 22111
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The Synthetic Tie2 Agonist Peptide Vasculotide Protects Renal Vascular Barrier
Function In Experimental Acute Kidney Injury
#MMPMID26911791
Rübig E
; Stypmann J
; Van Slyke P
; Dumont DJ
; Spieker T
; Buscher K
; Reuter S
; Goerge T
; Pavenstädt H
; Kümpers P
Sci Rep
2016[Feb]; 6
(ä): 22111
PMID26911791
show ga
Microvascular barrier dysfunction plays a major role in the pathophysiology of
acute kidney injury (AKI). Angiopoietin-1, the natural agonist ligand for the
endothelial-specific Tie2 receptor, is a non-redundant endothelial survival and
vascular stabilization factor. Here we evaluate the efficacy of a polyethylene
glycol-clustered Tie2 agonist peptide, vasculotide (VT), to protect against
endothelial-cell activation with subsequent microvascular dysfunction in a murine
model of ischemic AKI. Renal ischemia reperfusion injury (IRI) was induced by
clamping of the renal arteries for 35?minutes. Mice were treated with VT or
PEGylated cysteine before IRI. Sham-operated animals served as time-matched
controls. Treatment with VT significantly reduced transcapillary albumin flux and
renal tissue edema after IRI. The protective effects of VT were associated with
activation of Tie2 and stabilization of its downstream effector, VE-cadherin in
renal vasculature. VT abolished the decline in renal tissue blood flow,
attenuated the increase of serum creatinine and blood urea nitrogen after IRI,
improved recovery of renal function and markedly reduced mortality compared to
PEG [HR 0.14 (95% CI 0.05-0.78) P?0.05]. VT is inexpensive to produce,
chemically stable and unrelated to any Tie2 ligands. Thus, VT may represent a
novel therapy to prevent AKI in patients.
|Acute Kidney Injury/pathology/*prevention & control
[MESH]
|Albumins/metabolism
[MESH]
|Angiopoietin-1/chemistry
[MESH]
|Animals
[MESH]
|Biomimetic Materials/chemistry
[MESH]
|Capillary Permeability/drug effects
[MESH]
|Creatinine/blood
[MESH]
|Kidney/blood supply/*drug effects
[MESH]
|Male
[MESH]
|Mice
[MESH]
|Mice, Inbred C57BL
[MESH]
|Models, Animal
[MESH]
|Peptide Fragments/chemistry/*therapeutic use
[MESH]