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Undercarboxylated osteocalcin as a biomarker of subclinical atherosclerosis in
non-dialysis patients with chronic kidney disease
#MMPMID26381729
Zhang M
; Ni Z
; Zhou W
; Qian J
J Biomed Sci
2015[Sep]; 22
(1
): 75
PMID26381729
show ga
BACKGROUND: Studies in recent years have shown that undercarboxylated osteocalcin
(uOC) not only maintains bone mineralization, but is also involved in the
regulation of atherosclerosis. However, a correlation between uOC and carotid
atherosclerosis in non-dialysis patients with chronic kidney disease (CKD) has
not been investigated. A total of 240 non-dialysis patients with CKD were
included in the study. For these patients, the median estimated glomerular
filtration rate (eGFR) was 20.05 (12.43-49.32) ml/min/1.73m(2). Serum uOC levels
were measured using enzyme-linked immunosorbent assay (ELISA). Carotid
ultrasonography was performed to assess carotid atherosclerotic plaques and
intima-media thickness (IMT) in an attempt to analyze the relationship between
uOC level and carotid atherosclerosis. RESULTS: The uOC levels of non-dialysis
patients with CKD were significantly lower than those of healthy controls [28.16
(21.40-45.85) ng/mL vs. 36.42 (28.05-49.28) ng/mL, P?0.01]. The uOC levels
gradually decreased as CKD progressed (P?0.01). The uOC levels were
significantly lower in patients with carotid plaques than in patients without
carotid plaques [25.98 (20.14-31.35) ng/mL vs. 31.02 (25.86-36.40) ng/mL,
P?0.01]. uOC level showed significant negative correlation with IMT (r?=?-0.33,
P?0.01). Logistic regression analysis revealed that after adjustment for
various confounding factors, decreased uOC levels were shown to indicate
increased possibility of carotid atherosclerotic plaque development in
non-dialysis patients with CKD (on every 1 SD decrease in the uOC level, odds
ratio 1.70, 95 % confidence interval 1.24-2.98, P?0.01). Multivariate stepwise
regression analysis demonstrated that decreased uOC level (??=?-0.163, P?0.05)
was an independent risk factor for increased carotid IMT in non-dialysis patients
with CKD. CONCLUSION: Serum uOC levels in non-dialysis patients with CKD are
significantly lower than those in healthy individuals, and uOC is closely
associated with subclinical atherosclerosis in CKD patients.