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2015 ; 5
(ä): 13601
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Measures of kidney function by minimally invasive techniques correlate with
histological glomerular damage in SCID mice with adriamycin-induced nephropathy
#MMPMID26329825
Scarfe L
; Rak-Raszewska A
; Geraci S
; Darssan D
; Sharkey J
; Huang J
; Burton NC
; Mason D
; Ranjzad P
; Kenny S
; Gretz N
; Lévy R
; Kevin Park B
; García-Fiñana M
; Woolf AS
; Murray P
; Wilm B
Sci Rep
2015[Sep]; 5
(ä): 13601
PMID26329825
show ga
Maximising the use of preclinical murine models of progressive kidney disease as
test beds for therapies ideally requires kidney function to be measured
repeatedly in a safe, minimally invasive manner. To date, most studies of murine
nephropathy depend on unreliable markers of renal physiological function,
exemplified by measuring blood levels of creatinine and urea, and on various end
points necessitating sacrifice of experimental animals to assess histological
damage, thus counteracting the principles of Replacement, Refinement and
Reduction. Here, we applied two novel minimally invasive techniques to measure
kidney function in SCID mice with adriamycin-induced nephropathy. We employed i)
a transcutaneous device that measures the half-life of intravenously administered
FITC-sinistrin, a molecule cleared by glomerular filtration; and ii)
multispectral optoacoustic tomography, a photoacoustic imaging device that
directly visualises the clearance of the near infrared dye, IRDye 800CW
carboxylate. Measurements with either technique showed a significant impairment
of renal function in experimental animals versus controls, with significant
correlations with the proportion of scarred glomeruli five weeks after induction
of injury. These technologies provide clinically relevant functional data and
should be widely adopted for testing the efficacies of novel therapies. Moreover,
their use will also lead to a reduction in experimental animal numbers.