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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+Hypertens
2017 ; 30
(5
): 495-501
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Resequencing Study Identifies Rare Renin-Angiotensin-Aldosterone System Variants
Associated With Blood Pressure Salt-Sensitivity: The GenSalt Study
#MMPMID28199472
Kelly TN
; Li C
; Hixson JE
; Gu D
; Rao DC
; Huang J
; Rice TK
; Chen J
; Cao J
; Li J
; Anderson CE
; He J
Am J Hypertens
2017[May]; 30
(5
): 495-501
PMID28199472
show ga
BACKGROUND: The role of rare variants in blood pressure (BP) salt-sensitivity is
unknown. We conducted a resequencing study of the renin-angiotensin-aldosterone
system (RAAS) to identify rare variants associated with BP salt-sensitivity among
participants of the Genetic Epidemiology Network of Salt-Sensitivity (GenSalt)
study. METHODS: The GenSalt study was conducted among 1,906 participants who
underwent a 7-day low-sodium (51.3 mmol sodium/day) followed by a 7-day
high-sodium feeding study (307.8 mmol sodium/day). The 300 most salt-sensitive
and 300 most salt-resistant GenSalt participants were selected for the
resequencing study. Seven RAAS genes were resequenced using capillary-based
sequencing methods. Rare variants were tested for association with BP
salt-sensitivity using traditional burden tests. Single-marker analyses were
employed to test associations of low-frequency and common variants. RESULTS:
Aggregate rare variant analysis revealed an association of the RAAS pathway with
BP salt-sensitivity. Carriers of rare RAAS variants had a 1.55-fold [95%
confidence interval (CI): 1.15, 2.10] higher odds of salt-sensitivity compared to
noncarriers (P = 0.004), a finding which was significant after Bonferroni
correction. A nominal association of the APLN gene with salt-sensitivity was also
identified, with rare APLN variants conferring a 2.22-fold (95% CI: 1.05, 6.58)
higher odds of salt-sensitivity (P = 0.03). Single-marker analyses did not
identify variant-BP salt-sensitivity associations after Bonferroni adjustment. A
nominal association of a low-frequency, missense RENBP variant was identified.
Each minor allele of rs78377269 conferred a 2.21-fold (95% CI: 1.10, 4.42)
increased odds of salt-sensitivity (P = 0.03). CONCLUSIONS: This study presents
of the first evidence of a contribution of rare RAAS variants to BP
salt-sensitivity. Clinical Trial RegistryTrial Number: NCT00721721.