Summary
Forearm skin biopsies were obtained from diabetic subjects with and without limited joint mobility, and from non-diabetic control subjects. Collagen purified from these samples was assayed for non-enzymatic glycosylation. The level in all diabetic patients was significantly greater than that in control subjects (p<0.001), but those diabetic patients with limited joint mobility had a level of collagen glycosylation similar to that in those with normal joints (15.3±1.3 and 16.5±1.3 nmol fructose/10 mg protein, respectively; mean±SEM). Glycosylation of collagen in the diabetic patients correlated with glycosylated haemoglobin measured at the time of skin biopsy (r=0.60). These results do not support the hypothesis that non-enzymatic glycosylation of collagen, as reflected by the ketoamine link, plays an important role in the development of limited joint mobility in diabetes.
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Lyons, T.J., Kennedy, L. Non-enzymatic glycosylation of skin collagen in patients with Type 1 (insulin-dependent) diabetes mellitus and limited joint mobility. Diabetologia 28, 2–5 (1985). https://doi.org/10.1007/BF00276991
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DOI: https://doi.org/10.1007/BF00276991