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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 Am+J+Physiol+Renal+Physiol
2017 ; 312
(4
): F629-F639
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Determination of renal function and injury using near-infrared fluorimetry in
experimental cardiorenal syndrome
#MMPMID28077373
Ikeda M
; Wakasaki R
; Schenning KJ
; Swide T
; Lee JH
; Miller MB
; Choi HS
; Anderson S
; Hutchens MP
Am J Physiol Renal Physiol
2017[Apr]; 312
(4
): F629-F639
PMID28077373
show ga
Cardiorenal syndrome type 1 causes acute kidney injury but is poorly understood;
animal models and diagnostic aids are lacking. Robust noninvasive measurements of
glomerular filtration rate are required for injury models and clinical use.
Several have been described but are untested in translational models and suffer
from biologic interference. We developed a mouse model of cardiorenal syndrome
and tested the novel near-infrared fluorophore ZW800-1 to assess renal and
cardiac function. We performed murine cardiac arrest and cardiopulmonary
resuscitation followed by transthoracic echocardiography, 2 and 24 h later.
Transcutaneous fluorescence of ZW800-1 bolus dispersion and clearance was
assessed with whole animal imaging and compared with glomerular filtration rate
(GFR; inulin clearance), tubular cell death (using unbiased stereology), and
serum creatinine. Correlation, Bland-Altman, and polar analyses were used to
compare GFR with ZW800-1 clearance. Cardiac arrest and cardiopulmonary
resuscitation caused reversible cardiac failure, halving fractional shortening of
the left ventricle (n = 12, P = 0.03). Acute kidney injury resulted with
near-zero GFR and sixfold increase in serum creatinine 24 h later (n = 16, P <
0.01). ZW800-1 biodistribution and clearance were exclusively renal. ZW800-1
t(1/2) and clearance correlated with GFR (r = 0.92, n = 31, P < 0.0001). ZW800-1
fluorescence was reduced in cardiac arrest, and cardiopulmonary
resuscitation-treated mice compared with sham animals 810 s after injection (P <
0.01) and bolus time-dispersion curves demonstrated that ZW800-1 fluorescence
dispersion correlated with left ventricular function (r = 0.74, P < 0.01).
Cardiac arrest and cardiopulmonary resuscitation lead to experimental cardiorenal
syndrome type 1. ZW800-1, a small near-infrared fluorophore being developed for
clinical intraoperative imaging, is favorable for evaluating cardiac and renal
function noninvasively.