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Nepsilon-(carboxymethyl)lysine, Nepsilon-(carboxyethyl)lysine and vascular cell adhesion molecule-1 (VCAM-1) in relation to peritoneal glucose prescription and residual renal function; a study in peritoneal dialysis patients. 2004

Jos van de Kerkhof, and Casper G Schalkwijk, and Constantijn J Konings, and Emile C Cheriex, and Frank M van der Sande, and Peter G Scheffer, and Piet M ter Wee, and Karel M Leunissen, and Jeroen P Kooman
MD Department of Internal Medicine, University Hospital Maastricht, PO Box 5800, 6202 AZ Maastricht, The Netherlands.

BACKGROUND Advanced glycation end products (AGEs) may contribute to peritoneal and cardiovascular damage in peritoneal dialysis (PD) patients, possibly in part by over-expression of vascular cell adhesion molecule-1 (VCAM-1). It has been suggested that peritoneal glucose load, oxidative stress, as well as the uraemic state itself may lead to an increased formation of AGEs. Aims of the present study were first to investigate the relation between residual glomerular filtration rate (rGFR), malondialdehyde (MDA) as a marker of lipid peroxidation, and peritoneal glucose prescription and absorption with serum levels of VCAM-1 and with the well characterized AGEs N(epsilon)-(carboxymethyl)lysine (CML) and N(epsilon)-(carboxyethyl)lysine (CEL), as well as with CML and CEL in peritoneal effluent. METHODS CML and CEL were measured by tandem mass spectroscopy, MDA by HPLC, and VCAM-1 by ELISA in 37 stable PD patients (age 54 +/- 12 years; time on PD 25 +/- 18 months). CML and CEL were also measured after a 4-month interval. RESULTS rGFR was independently related to CML both in serum (r = -0.66; P<0.001) and effluent (r = -0.62; P<0.001), whereas peritoneal glucose prescription and absorption were, respectively, related to CML in serum and effluent (r = 0.49; P<0.001 and r = 0.44; P<0.01). Relationships were comparable when assessed after the follow-up period. Peritoneal glucose absorption (r = 0.37; P<0.05), but not rGFR, was related to CEL in serum. The relation between peritoneal glucose prescription and CML in effluent lost significance when rGFR was added to the multi-regression model. Both rGFR (r = -0.40; P<0.05) and peritoneal glucose absorption (r = 0.37; P<0.05) were associated with VCAM-1 expression, which was itself weakly related only to CML in effluent (r = 0.38; P<0.05). MDA was not related to any parameter. CONCLUSIONS Peritoneal glucose prescription and absorption, as well as rGFR are related to serum and effluent levels of CML and to VCAM-1 expression in serum, whereas peritoneal glucose absorption was related to serum levels of CEL. Still, the effect of rGFR, which does not appear to be mediated through lipid peroxidation pathways, on effluent levels of CML appears to outweigh the effect of the PD treatment. Even small differences in residual renal function in patients already on dialysis therapy are related to large variations of CML in serum and the peritoneal cavity.

UI MeSH Term Description Entries
D007676 Kidney Failure, Chronic The end-stage of CHRONIC RENAL INSUFFICIENCY. It is characterized by the severe irreversible kidney damage (as measured by the level of PROTEINURIA) and the reduction in GLOMERULAR FILTRATION RATE to less than 15 ml per min (Kidney Foundation: Kidney Disease Outcome Quality Initiative, 2002). These patients generally require HEMODIALYSIS or KIDNEY TRANSPLANTATION. ESRD,End-Stage Renal Disease,Renal Disease, End-Stage,Renal Failure, Chronic,Renal Failure, End-Stage,Chronic Kidney Failure,End-Stage Kidney Disease,Chronic Renal Failure,Disease, End-Stage Kidney,Disease, End-Stage Renal,End Stage Kidney Disease,End Stage Renal Disease,End-Stage Renal Failure,Kidney Disease, End-Stage,Renal Disease, End Stage,Renal Failure, End Stage
D008239 Lysine An essential amino acid. It is often added to animal feed. Enisyl,L-Lysine,Lysine Acetate,Lysine Hydrochloride,Acetate, Lysine,L Lysine
D008297 Male Males
D008875 Middle Aged An adult aged 45 - 64 years. Middle Age
D010530 Peritoneal Dialysis Dialysis fluid being introduced into and removed from the peritoneal cavity as either a continuous or an intermittent procedure. Dialyses, Peritoneal,Dialysis, Peritoneal,Peritoneal Dialyses
D003430 Cross-Sectional Studies Studies in which the presence or absence of disease or other health-related variables are determined in each member of the study population or in a representative sample at one particular time. This contrasts with LONGITUDINAL STUDIES which are followed over a period of time. Disease Frequency Surveys,Prevalence Studies,Analysis, Cross-Sectional,Cross Sectional Analysis,Cross-Sectional Survey,Surveys, Disease Frequency,Analyses, Cross Sectional,Analyses, Cross-Sectional,Analysis, Cross Sectional,Cross Sectional Analyses,Cross Sectional Studies,Cross Sectional Survey,Cross-Sectional Analyses,Cross-Sectional Analysis,Cross-Sectional Study,Cross-Sectional Surveys,Disease Frequency Survey,Prevalence Study,Studies, Cross-Sectional,Studies, Prevalence,Study, Cross-Sectional,Study, Prevalence,Survey, Cross-Sectional,Survey, Disease Frequency,Surveys, Cross-Sectional
D005260 Female Females
D005919 Glomerular Filtration Rate The volume of water filtered out of plasma through glomerular capillary walls into Bowman's capsules per unit of time. It is considered to be equivalent to INULIN clearance. Filtration Rate, Glomerular,Filtration Rates, Glomerular,Glomerular Filtration Rates,Rate, Glomerular Filtration,Rates, Glomerular Filtration
D005947 Glucose A primary source of energy for living organisms. It is naturally occurring and is found in fruits and other parts of plants in its free state. It is used therapeutically in fluid and nutrient replacement. Dextrose,Anhydrous Dextrose,D-Glucose,Glucose Monohydrate,Glucose, (DL)-Isomer,Glucose, (alpha-D)-Isomer,Glucose, (beta-D)-Isomer,D Glucose,Dextrose, Anhydrous,Monohydrate, Glucose
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man

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