Methylglyoxal-Induced Glycation of Plasma Albumin: From Biomarker Discovery to Clinical Use for Prediction of New-Onset Diabetes in Individuals with Prediabetes.
Arsênio Rodrigues Oliveira, Chloé Chevalier, Matthieu Wargny, Victoria Pakulska, Cédric Caradeuc, Chloé Cloteau, Marine P M Letertre, Nicolas Giraud, Gildas Bertho, Edith Bigot-Corbel, Maxime Carpentier, Georges Nouadje, Yohann Couté, Cédric Le May, Bertrand Cariou, Samy Hadjadj, Mikaël Croyal
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引用次数: 0
Abstract
Background: Methylglyoxal (MGO) is a potent glycating agent that contributes to the pathogenesis of diabetes. However, MGO is unstable in plasma without demanding sample preparation at blood collection, limiting its clinical utility as a biomarker. We aimed to discover reliable MGO-glycated albumin (ALB)-derived biomarkers and to assess their association with new-onset diabetes (NOD) in people with prediabetes.
Methods: Bottom-up mass spectrometry-based proteomics was used to discover peptide biomarkers of MGO-glycated ALB, including MGO-derived hydroimidazolone (MGH)-ALB219-225, which proved to be biologically stable and reliable for large-scale analyses in human plasma. After assay validation, the IT-DIAB (Innovation Thérapeutique DIABète) prospective study, conducted in 300 individuals with impaired fasting plasma glucose (FPG) levels (110 to 125 mg/dL, 6.1 to 6.9 mmol/L), was used to assess the association between plasma MGH-ALB219-225 and NOD, defined as FPG ≥126 mg/dL (7 mmol/L), using Kaplan-Meier curves and Cox models.
Results: In total, 113 participants of the IT-DIAB study developed NOD during a median follow-up of 5 years. There was a graded association between the baseline plasma MGH-ALB219-225 concentration and incident NOD (log-rank P < 0.0001), in contrast to a lack of association for plasma MGO and total or glycated ALB (commercial kit). After adjustment for age, sex, body mass index, FPG, hemoglobin (Hb) A1c, and ALB, the plasma levels of MGH-ALB219-225 were associated with NOD (hazard ratio [HR] per one SD [95% CI] = 1.50 [1.26-1.78]; P < 0.0001).
Conclusions: MGH-ALB219-225 is a novel and stable peptide biomarker of MGO-glycated ALB, whose plasma levels are positively associated with an increased risk of NOD in individuals with prediabetes, independently of traditional risk factors. ClinicalTrials.gov Registration Number: NCT01218061.
期刊介绍：
Clinical Chemistry is a peer-reviewed scientific journal that is the premier publication for the science and practice of clinical laboratory medicine. It was established in 1955 and is associated with the Association for Diagnostics & Laboratory Medicine (ADLM).
The journal focuses on laboratory diagnosis and management of patients, and has expanded to include other clinical laboratory disciplines such as genomics, hematology, microbiology, and toxicology. It also publishes articles relevant to clinical specialties including cardiology, endocrinology, gastroenterology, genetics, immunology, infectious diseases, maternal-fetal medicine, neurology, nutrition, oncology, and pediatrics.
In addition to original research, editorials, and reviews, Clinical Chemistry features recurring sections such as clinical case studies, perspectives, podcasts, and Q&A articles. It has the highest impact factor among journals of clinical chemistry, laboratory medicine, pathology, analytical chemistry, transfusion medicine, and clinical microbiology.
The journal is indexed in databases such as MEDLINE and Web of Science.
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