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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 Clin+Chim+Acta
2013 ; 421
(ä): 236-42
Nephropedia Template TP
gab.com Text
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English Wikipedia
A linear relationship between the ex-vivo sodium mediated expression of two
sodium regulatory pathways as a surrogate marker of salt sensitivity of blood
pressure in exfoliated human renal proximal tubule cells: the virtual renal
biopsy
#MMPMID23454474
Gildea JJ
; Lahiff DT
; Van Sciver RE
; Weiss RS
; Shah N
; McGrath HE
; Schoeffel CD
; Jose PA
; Carey RM
; Felder RA
Clin Chim Acta
2013[Jun]; 421
(ä): 236-42
PMID23454474
show ga
BACKGROUND: Salt sensitivity (SS) of blood pressure (BP) affects 25% of adults,
shares comorbidity with hypertension, and has no convenient diagnostic test. We
tested the hypothesis that urine-derived exfoliated renal proximal tubule cells
(RPTCs) could diagnose the degree of an individual's SS of BP. METHODS: Subjects
were selected who had their SS of BP determined 5 y prior to this study
(salt-sensitive: ?7 mm Hg increase in mean arterial pressure (MAP) following
transition from a random weekly diet of low (10 mmol/day) to high (300 mmol/day)
sodium (Na(+)) intake, N=4; inverse salt-sensitive (ISS): ?7 mm Hg increase in
MAP transitioning from a high to low Na(+) diet, N=3, and salt-resistant (SR): <7
mm Hg change in MAP transitioned on either diet, N=5). RPTC responses to 2
independent Na(+) transport pathways were measured. RESULTS: There was a negative
correlation between the degree of SS and dopamine-1 receptor (D1R) plasma
membrane recruitment (y=-0.0107x+0.68 relative fluorescent units (RFU),
R(2)=0.88, N=12, P<0.0001) and angiotensin II-stimulated intracellular Ca(++)
(y=-0.0016x+0.0336, R(2)=0.7112, P<0.001, N=10) concentration over baseline.
CONCLUSIONS: Isolating RPTCs from urine provides a personalized cell-based
diagnostic test of SS index that offers advantages over a 2-week controlled diet
with respect to cost and patient compliance. Furthermore, the linear relationship
between the change in MAP and response to 2 Na(+) regulatory pathways suggests
that an individual's RPTC response to intracellular Na(+) is personalized and
predictive.