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2014 ; 15
(ä): 87
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Cardiovascular disease relates to intestinal uptake of p-cresol in patients with
chronic kidney disease
#MMPMID24912660
Poesen R
; Viaene L
; Verbeke K
; Augustijns P
; Bammens B
; Claes K
; Kuypers D
; Evenepoel P
; Meijers B
BMC Nephrol
2014[Jun]; 15
(ä): 87
PMID24912660
show ga
BACKGROUND: Serum p-cresyl sulfate (PCS) associates with cardiovascular disease
in patients with chronic kidney disease. PCS concentrations are determined by
intestinal uptake of p-cresol, human metabolism to PCS and renal clearance.
Whether intestinal uptake of p-cresol itself is directly associated with
cardiovascular disease in patients with renal dysfunction has not been studied to
date. METHODS: We performed a prospective study in patients with chronic kidney
disease stage 1 - 5 (NCT00441623). Intestinal uptake of p-cresol, under steady
state conditions, was estimated from 24 h urinary excretion of PCS. Primary
endpoint was time to first cardiovascular event, i.e., cardiac death, myocardial
infarction/ischemia, ventricular arrhythmia, cardiovascular surgery, ischemic
stroke or symptomatic peripheral arterial disease. Statistical analysis was done
using Kaplan-Meier estimates and Cox proportional hazard analyses. RESULTS: In a
cohort of 200 patients, median 24 h urinary excretion of PCS amounted to 457.47
?mol (IQR 252.68 - 697.17). After a median follow-up of 52 months, 25 patients
reached the primary endpoint (tertile 1/2/3: 5/6/14 events, log rank P 0.037).
Higher urinary excretion of PCS was directly associated with cardiovascular
events (univariate hazard ratio per 100 ?mol increase: 1.112, P 0.002). In
multivariate analysis, urinary excretion of PCS remained a predictor of
cardiovascular events, independent of eGFR (hazard ratio 1.120, P 0.002).
CONCLUSIONS: In patients with chronic kidney disease, intestinal uptake of
p-cresol associates with cardiovascular disease independent of renal function.
The intestinal generation and absorption of p-cresol may be therapeutic targets
to reduce cardiovascular disease risk in patients with renal dysfunction.