Human Achilles tendon glycation and function in diabetes

Christian Couppé, Rene Brüggebusch Svensson, Mads Kongsgaard Madsen, Vuokko Kovanen, Jean-Francois Grosset, Ole Snorgaard, Jesper Bencke, Jytte Overgaard Larsen, Thomas Bandholm, Tomas Møller Christensen, Anders Boesen, Ida C Helmark, Per Aagaard, Michael Kjaer, Stig Peter Magnusson

38 Citationer (Scopus)

Abstract

Diabetic patients have an increased risk of foot ulcers, and glycation of collagen may increase tissue stiffness. We hypothesized that the level of glycemic control (glycation) may affect Achilles tendon stiffness, which can influence gait pattern. We therefore investigated the relationship between collagen glycation, Achilles tendon stiffness parameters, and plantar pressure in poorly (n = 22) and well (n = 22) controlled diabetic patients, including healthy age-matched (45-70 yr) controls (n = 11). There were no differences in any of the outcome parameters (collagen cross-linking or tendon stiffness) between patients with well-controlled and poorly controlled diabetes. The overall effect of diabetes was explored by collapsing the diabetes groups (DB) compared with the controls. Skin collagen cross-linking lysylpyridinoline, hydroxylysylpyridinoline (136%, 80%, P < 0.01) and pentosidine concentrations (55%, P < 0.05) were markedly greater in DB. Furthermore, Achilles tendon material stiffness was higher in DB (54%, P < 0.01). Notably, DB also demonstrated higher forefoot/rearfoot peak-plantar-pressure ratio (33%, P < 0.01). Overall, Achilles tendon material stiffness and skin connective tissue cross-linking were greater in diabetic patients compared with controls. The higher foot pressure indicates that material stiffness of tendon and other tissue (e.g., skin and joint capsule) may influence foot gait. The difference in foot pressure distribution may contribute to the development of foot ulcers in diabetic patients.

OriginalsprogEngelsk
TidsskriftJournal of Applied Physiology
Vol/bind120
Udgave nummer2
Sider (fra-til)130-137
Antal sider8
ISSN8750-7587
DOI
StatusUdgivet - 15 jan. 2016

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