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2016 ; 6
(ä): 26137
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Chiral amino acid metabolomics for novel biomarker screening in the prognosis of
chronic kidney disease
#MMPMID27188851
Kimura T
; Hamase K
; Miyoshi Y
; Yamamoto R
; Yasuda K
; Mita M
; Rakugi H
; Hayashi T
; Isaka Y
Sci Rep
2016[May]; 6
(ä): 26137
PMID27188851
show ga
D-Amino acids, the enantiomers of L-amino acids, are increasingly recognized as
novel biomarkers. Although the amounts of D-amino acids are usually very trace in
human, some of them have sporadically been detected in blood from patients with
kidney diseases. This study examined whether multiple chiral amino acids would be
associated with kidney functions, comorbidities, and prognosis of chronic kidney
disease (CKD) by enantioselective analyses of all chiral amino acids with a
micro-two-dimensional high-performance liquid chromatograph (2D-HPLC)-based
analytical platform. 16 out of 21 D-amino acids were detected in plasma from 108
CKD patients in a longitudinal cohort. The levels of D-Ser, D-Pro, and D-Asn were
strongly associated with kidney function (estimated glomerular filtration ratio),
the levels of D-Ala and D-Pro were associated with age, and the level of D-Asp
and D-Pro were associated with the presence of diabetes mellitus. D-Ser and D-Asn
were significantly associated with the progression of CKD in mutually-adjusted
Cox regression analyses; the risk of composite end point (developing to ESKD or
death before ESKD) was elevated from 2.7- to 3.8-fold in those with higher levels
of plasma D-Ser and D-Asn. These findings identified chiral amino acids as
potential biomarkers in kidney diseases.