Objective: To investigate the effect of Xianzhen tablet (XZT, a Chinese patent compound recipe) on advanced glycosylation end products (AGEs) and mRNA expression of AGE-specific cellular receptor (RAGE) in renal cortex of diabetic rats in order to explore the mechanism of XZT in protecting kidney.
Methods: The diabetic rat model with persistent hyperglycemic renal damage was reproduced by streptozotocin. Fluorescent assay and RT-PCR were used to determine the content of AGEs and expression of RAGE mRNA in renal cortex in model rats, which were treated with XZT and controlled by aminoguanidine (AG) administration.
Results: The relative content of AGEs and RAGE mRNA expression in renal cortex of model rats 12 weeks after modeling were significantly higher than those in the normal group (P < 0.05), while those in model rats treated by XZT or AG were markedly lower than those in non-treated model rats (P < 0.05), the effect of the both groups showed insignificant difference (P > 0.05).
Conclusion: XZT could reduce the accumulation of AGEs in renal cortex of diabetic rats, down-regulate the over-expression of RAGE mRNA, with the effects similar to that of AG, the inhibition of XZT on protein non-enzymatic glycosylation might be one of the mechanisms of its effect in protecting kidney.
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