The dry thermal glycation method was used to conjugate D-glucose and D-fructose with bovine serum albumin. Reactions were conducted at 50-104oC for 30 min. Depending on temperature, different levels of substitution were achieved. In the case of D-glucose average substitution level of up to 53 mol glucose/mol BSA were obtained. D-Fructose turned out to be less reactive than D-glucose. The pH of the reaction mixture was also found to affect the efficiency of the glycation reaction. The levels of substitution were estimated using matrix assisted laser desorption/ionisation time of flight mass spectrometry (MALDI-TOF) and SDS-polyacrylamide gel electrophoresis. Glycated molecules, and a process of glycation itself are implicated in diabetes complications. Hypothetically bovine spongiform encephalopathy (BSE) was also derived from glycation.
U. Kanska, Department of Tumor Immunology, Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, 12 Weigla, 53-114 Wroclaw, Poland