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2016 ; 20
(2
): 162-8
Nephropedia Template TP
gab.com Text
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Twit Text #
English Wikipedia
Involvement of the renin-angiotensin system in the development of nephrogenic
systemic fibrosis-like lesions in the RenTag mouse model
#MMPMID26138357
Sexton S
; Tulowitzki R
; Jones CA
; Shah S
; Hajduczok G
; Gross KW
; Panesar M
Clin Exp Nephrol
2016[Apr]; 20
(2
): 162-8
PMID26138357
show ga
BACKGROUND: Renin-angiotensin system (RAS) activation increases angiotensin II
production stimulating profibrotic factors, especially in the setting of chronic
kidney disease. Nephrogenic systemic fibrosis (NSF) has been associated with
gadolinium (Gd) exposure and renal failure. RAS involvement in NSF is unclear
compared to transforming growth factor beta and Smad. RenTag mice were chosen to
investigate the role of RAS in NSF-like dermal fibrosis because they demonstrated
dermal fibrosis at birth, perturbations of RAS in subcutaneous tissue, and renal
failure within 4 weeks of age. METHODS: Wild-type and RenTag mice were injected
weekly with a supratherapeutic dose of intravenous gadodiamide (3.0 mmol/kg body
weight) and killed at 12 weeks of age for skin and kidney histology. RESULTS:
RenTag mice had elevated BUN levels, pitted kidneys, and glomerular damage.
RenTag mice skin revealed an increased density of fibroblasts, no
mucopolysaccharide deposits, and increased collagen fibril density regardless of
Gd exposure. Skin and kidney histopathology of wild-type mice were normal
regardless of Gd exposure. CD34 positivity was higher in RenTag compared to
wild-type. CONCLUSIONS: Since RenTag dermal lesions remained unchanged after
gadolinium exposure in the setting of renal failure, this animal model suggests
perturbations of subcutaneous RAS may be involved in Gd-naïve dermal fibrosis.