Relationship of methylglyoxal-adduct biogenesis to LDL and triglyceride levels in diabetics.
Life Sci
; 89(13-14): 485-90, 2011 Sep 26.
Article
em En
| MEDLINE
| ID: mdl-21839095
ABSTRACT
AIMS:
Protein glycation leading to advanced glycation-endproducts (AGE) is enhanced in diabetes by increased blood glucose and collateral endogenous production of reactive α-dicarbonyls. Among AGE precursors, methylglyoxal (MG) is considered as one of the key intermediates. We hypothesized it to be a common product of both carbonyl and oxidative stress, and investigated its biogenesis in relation to glycemic and lipid status in diabetic patients.METHODS:
Serum and urine MG-adducts were measured by competitive immunofluorometric assay in 83 diabetic and 20 healthy subjects. KEYFINDINGS:
A significant association of MG-adducts serum level with LDL (r=0.31;p=0.003) was observed. A correlation between LDL-c, HDL-C and PPG as independent variables and serum MG-adducts as a dependent variable was found (p<0.014) using multiple stepwise regression, whereas urine albumin/creatinine ratio was independently associated with urine MG-adducts. LDL cut-off >3.0mmol/l discriminated patients with higher serum MG-adducts (p=0.0052), although there was no between-subgroup difference in glycemic control. Patients on statin therapy had a lower MG-adduct level. The positive relationship between LDL-c and MG-adducts (r=0.38;p=0.042) was noted in patients free of statin treatment, whereas an inverse tendency was found in the statin-treated subgroup.SIGNIFICANCE:
Significant relationship between LDL and MG-adduct production, as well as tight correlation between triglycerides and urinary MG-adduct excretion suggest that the lipoxidation and glyceraldehyde-3-phosphate route, along with the glycolytic pathway, might be an important source of MG generation. The glycotoxin methylglyoxal seems to be a common factor linking hyperglycemia and intensive lipolysis, two dominant metabolic changes in diabetes.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Aldeído Pirúvico
/
Triglicerídeos
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Diabetes Mellitus
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LDL-Colesterol
Limite:
Adult
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Aged
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Aged80
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Humans
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Middle aged
Idioma:
En
Revista:
Life Sci
Ano de publicação:
2011
Tipo de documento:
Article