[Detection of glycosylated protein of renal tissues using NBT reaction in STZ-induced diabetic rats].
1992
: We are carried out to determine the detection of glycosylated protein of renal tissues using nitroblue tetrazolium (NBT) reaction in streptozotocin (STZ)-induced diabetic rats. The levels of glomerular non-enzymatic glycosylation were measured by thiobarbituric acid (TBA) method. There was no significant difference in the intensity of NBT in renal tissues between the 4-week diabetic rats and the same age control rats. The intensity of NBT in the glomerular mesangial areas and capillary walls was marked in 12-week diabetic rats. The staining of NBT was also observed in the tubular epithelial cells in 4- and 12-week diabetic rats. The levels of glomerular non-enzymatic glycosylated protein in 4- or 12-week diabetic rats were significantly greater than those in the same age control rats. It appears that the non-enzymatic glycosylation of renal tissues increased in the early stage of diabetic nephropathy, i.e. 4- or 12-week diabetic rats. It is concluded that the non-enzymatic glycosylation may play an important role in the initiation of renal injuries in diabetic nephropathy.
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