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Abstract
We have measured non-enzymatic glycation of proteins in the cytoskeletal and myelin
fractions of nerve fascicles from human sural nerves obtained from diabetic and non-diabetic
amputation specimens. Levels of the early reversible glycation adduct, measured as
furosine did not differ significantly between diabetics and controls in either protein
fraction. Pentosidine levels per unit protein were significantly elevated in diabetics
relative to controls in both cytoskeletal (5.96 vs 4.47; p = 0.037) and myelin protein (1.35 vs 0.69; p = 0.023) fractions. Protein cross-linkage in the cytoskeletal fraction, probably
due to AGEs, was also higher in diabetics than controls (504 vs 349; p = 0.057). These results show that increased AGE accumulation occurs in cytoskeletal,
as well as myelin, peripheral nerve proteins in diabetics. This suggests a possible
new mechanism contributing to the axonal degeneration polyneuropathy of diabetes which
is based upon irreversible glycation of axonal cytoskeletal proteins causing their
cross-linkage and altered function.
Keywords
Abbreviations:
AGE (advanced glycation endproduct), DRG (dorsal root ganglion), NF (neurofilament), PMSF (phenyl methyl sulfonyl fluoride)To read this article in full you will need to make a payment
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Article info
Publication history
Accepted:
October 23,
1994
Received in revised form:
October 14,
1994
Received:
March 9,
1994
Identification
Copyright
© 1995 Published by Elsevier Inc.