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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Silver staining of collagen type I after sodium dodecylsulphate polyacrylamide gel electrophoresis: effect of Maillard reaction.

Differences in the acidic silver staining, after sodium dodecylsulphate polyacrylamide gel electrophoresis, between the alpha 1 and alpha 2 collagen chains, as well as between rat-tail tendon and calf-skin collagen type I, were observed. The staining conditions at which the staining differences are both most expressed and reproducible were characterized. Age differences between staining of the alpha 1 CB6 fragment from young rats (2 and 12 months) and old rats (29 months) indicated that different susceptibilities of collagen species to the silver staining can be the result of different extents of some age-dependent post-translational modification, such as glycation. In vitro incubation of acid-soluble rat-tail tendon collagen with various sugars led to an increase in silver staining compared with samples incubated in the absence of sugar. This effect was inhibited by sodium cyanoborohydride, diethylenetriamine pentaacetic acid and aminoguanidine, i.e. compounds inhibiting the Maillard reaction at various stages. It can be concluded that the enhanced silver susceptibility of glycated collagen is related to advanced-phase Maillard reaction products attached to collagen.[1]


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