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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
2016 ; 310
(10
): F1054-64
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Spontaneous one-kidney rats are more susceptible to develop hypertension by
DOCA-NaCl and subsequent kidney injury compared with uninephrectomized rats
#MMPMID26936874
Wang X
; Johnson AC
; Sasser JM
; Williams JM
; Solberg Woods LC
; Garrett MR
Am J Physiol Renal Physiol
2016[May]; 310
(10
): F1054-64
PMID26936874
show ga
There is little clinical data of how hypertension may influence individuals with
nephron deficiency in the context of being born with a single kidney. We recently
developed a new rat model (the heterogeneous stock-derived model of unilateral
renal agenesis rat) that is born with a single kidney and exhibits progressive
kidney injury and decline in kidney function with age. We hypothesized that
DOCA-salt would induce a greater increase in blood pressure and therefore
accelerate the progression of kidney injury in rats born with a solitary kidney
compared with rats that have undergone unilateral nephrectomy. Time course
evaluation of blood pressure, kidney injury, and renal hemodynamics was performed
in the following six groups of animals from weeks 13 to 18: 1) DOCA-treated rats
with a solitary kidney (DOCA+S group), 2) placebo-treated rats with a solitary
kidney, 3) DOCA-treated control rats with two kidneys (DOCA+C group), 4)
placebo-treated control rats with two kidneys, 5) DOCA-treated rats with two
kidneys that underwent uninephrectomy (DOCA+UNX8 group), and 6) placebo-treated
rats with two kidneys that underwent uninephrectomy. DOCA+S rats demonstrated a
significant rise (P < 0.05) in blood pressure (192 ± 4 mmHg), proteinuria (205 ±
31 mg/24 h), and a decline in glomerular filtration rate (600 ± 42 ?l·min(-1)·g
kidney weight(-1)) relative to the DOCA+UNX8 (173 ± 3 mmHg, 76 ± 26 mg/24 h, and
963 ± 36 ?l·min(-1)·g kidney weight(-1)) and DOCA+C (154 ± 2 mmHg, 7 ± 1 mg/24 h,
and 1,484 ± 121 ?l·min(-1)·g kidney weight(-1)) groups. Placebo-treated groups
showed no significant change among the three groups. An assessment of renal
injury markers via real-time PCR/Western blot analysis and histological analysis
was concordant with the measured physiological parameters. In summary, congenital
solitary kidney rats are highly susceptible to the induction of hypertension
compared with uninephrectomized rats, suggesting that low nephron endowment is an
important driver of elevated blood pressure, hastening nephron injury through the
transmission of elevated systemic blood pressure and thereby accelerating decline
in kidney function.