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N. Yu. Ignatieva, N. A. Danilov, V. V. Lunin, M. V. Obrezkova, S. V. Averkiev, T. I. Chaikovskii

The alteration of thermodynamic characteristics of corneal tissue collagen denaturation as the result of the non-enzymatic glycation

Abstract

The study was intended to investigate the thermal stability of scleral and corneal tissues subjected to treatment by ribose, threose and glyceraldehyde in vitro. The thermal transition temperature and enthalpy of cross-linking collagen fibres were obtained by differential scanning calorimetry (DSC). The resistance of tissues by trypsine treatment was defined too after heating in the furnace of the DSC-device. It was shown that the denaturation temperature of scleral and corneal samples subjected to treatment by cross-linking agents increased, but the enthalpy decreased. It is suggested that cross-linking formation in collagen matrix of cornea and sclera prevents complete collagen denaturation if the temperature doesn’t go up to 110°C.
Moscow University Chemistry Bulletin.
2007, Vol. 48, No. 2, P. 75
   

Copyright (C) Chemistry Dept., Moscow State University, 2002
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