Abstract:
:Increased oxidative stress (SOX), inflammation and prevalence of cardiovascular disease (CVD) have been reported in end-stage renal disease (ESRD), but their associations with kynurenine (KYN) pathway activation remain unknown. We determined the plasma concentrations of tryptophan (TRP), KYN, 3-hydroxykynurenine (3-HKYN); two distinct SOX markers: Cu/Zn superoxide dismutase (Cu/Zn SOD) and total peroxide; and high sensitivity C-reactive protein (hs CRP) as a indicator of inflammation in 146 ESRD patients and healthy controls. Analysis of TRP degradation through the KYN pathway demonstrated that in uremia the concentrations of this aminoacid were decreased by 40-60% in comparison with controls. In contrast, the plasma levels of KYN and 3-HKYN in ESRD patients were increased by 32-96% and 184-306%, respectively. These changes were accompanied by significant increase in the kyn/trp ratios by 140-240%, and 3-hkyn/kyn ratios by 40-154% in uremics compared to controls. ESRD patients showed a significant increase in Cu/Zn SOD, total peroxide and hs CRP levels between controls and all patients group. KYN and 3-HKYN were positively associated with inflammation and SOX markers in uremics. Logistic regression analysis showed that age, gender, presence of DM (all p<0.001), elevated hs CRP (p<0.01) and 3-HKYN levels (p<0.05) were independently associated with the presence of CVD in this population. These results suggest a relationship between KYN pathway activation and increased SOX, inflammation and CVD prevalence in ESRD patients.
journal_name
Atherosclerosisjournal_title
Atherosclerosisauthors
Pawlak K,Domaniewski T,Mysliwiec M,Pawlak Ddoi
10.1016/j.atherosclerosis.2008.08.014subject
Has Abstractpub_date
2009-05-01 00:00:00pages
309-14issue
1eissn
0021-9150issn
1879-1484pii
S0021-9150(08)00591-1journal_volume
204pub_type
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