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Relationship between tissue glycation measured by autofluorescence and pulse wave velocity in young and elderly non-diabetic populations - 13/11/12

Doi : 10.1016/j.diabet.2012.04.004 
G. Watfa a, b, c, d, G. Soulis a, E. Tartagni e, A. Kearney-Schwartz a, C. Borghi e, P. Salvi a, e, A. Benetos a, b, c, d,
a Department of Geriatrics, University Hospital of Nancy, 54500 Vandœuvre-lès-Nancy, France 
b Inserm, U961, Faculty of Medicine, Nancy, France 
c University of Nancy, Nancy, France 
d University Hospital of Nancy & Inserm Clinical Investigation Centre, CIC 9501, Nancy, France 
e Internal Medicine, Aging and Kidney Disease Department, University of Bologna, Bologna, Italy 

Corresponding author. Tel.: +33 3 83 15 33 22; fax: +33 3 83 15 76 68.

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Abstract

Objective

Advanced glycation end-products (AGEs) and pulse wave velocity (PWV) are pivotal indices of the processes of arterial ageing and damage accumulation. The aim of the present study was to investigate the impact of AGEs, as measured by a non-invasive skin autofluorescence method, on arterial stiffness, estimated by PWV, in two different age groups of non-diabetic subjects.

Methods and patients

A total of 116 non-diabetic subjects were classified into two groups, with 55 subjects in the group aged <65years and 61 in the group aged ≥65years. AGEs were measured by skin autofluorescence while carotid–femoral PWV was assessed by tonometry.

Results

A significant (positive) association was observed between PWV and AGE skin autofluorescence in the younger age group (r=0.51; P<0.0001). However, this association was no longer significant after further adjustments for age and other factors on multiple regression analyses. In contrast, this correlation was not found in the elderly group (r=0.098; P=0.454).

Conclusion

Younger non-diabetic subjects exhibit a different correlation profile between AGEs accumulated in skin and cfPWV as an index of arterial stiffness compared with elderly subjects. AGEs were significantly associated with cfPWV in younger individuals, but not in the elderly. A further study with a larger number of subjects is proposed to confirm the contribution of AGEs, the formation of which is manageable, as a determinant of arterial stiffness in younger subjects.

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Résumé

Objectif

Les produits de la glycation avancée (AGEs) et la vitesse de l’onde de pouls (VOP) sont des indices pivots du processus du vieillissement artériel et de l’accumulation de dommages tissulaires. Le but de la présente étude était d’étudier l’impact des AGEs, mesurés par une méthode non invasive de mesure de l’autofluorescence cutanée, sur la rigidité artérielle évaluée par la VOP dans deux groupes de sujets non diabétiques et d’âge différents.

Méthodes et patients

Cent seize sujets non diabétiques ont été classés en deux groupes : 55 sujets dans le groupe sujets jeunes (<65ans) et 61 dans le groupe sujets âgés (≥65ans). Les AGEs ont été mesurés par autofluorescence cutanée et la VOP carotido-fémorale a été évaluée par tonométrie.

Résultats

Une relation positive significative a été observée entre la VOP et les AGEs mesurés par autofluorescence cutanée dans le groupe des sujets jeunes (r=0,51, P<0,0001). Cette relation n’était plus significative après ajustement sur l’âge et d’autres facteurs par l’analyse de régression multiple. En revanche, cette corrélation n’a pas été observée dans le groupe des sujets âgés (r=0,098, P=0,454).

Conclusion

Les sujets non diabétiques jeunes présentent un profil de corrélation différent entre l’accumulation des AGEs et la VOP (comme indice de la rigidité artérielle) comparativement à ce qui a été observé chez les sujets âgés. Les AGEs sont significativement corrélés à la VOP chez les sujets jeunes, mais non chez les sujets âgés. Une étude complémentaire portant sur un plus grand nombre de sujets est nécessaire pour confirmer la contribution des AGEs, dont la formation est régulée comme un déterminant de la rigidité artérielle chez les sujets jeunes.

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Keywords : AGEs, PVW, Pulse wave velocity, Elderly, Non-diabetic

Mots clés : AGEs, VOP, Vitesse de l’onde de pouls, Personnes âgées, Non diabétiques


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Vol 38 - N° 5

P. 413-419 - novembre 2012 Ritorno al numero
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