Changes in Activity of Matrix Metalloproteinases and Serum Concentrations of Proinsulin and C-Peptide Depending on the Compensation Stage of Type 2 Diabetes Mellitus

Abstract

In patients with type 2 diabetes mellitus, serum activities of MMP-2 and MMP-7 were substantially decreased in comparison with apparently healthy individuals. At the decompensation stage, along with the increased content of glucose and glycated hemoglobin, a pronounced (3-fold) increase in proinsulin concentration was observed. On the contrary, MMP activity and C-peptide concentration decreased at this stage. The ratio of proinsulin concentration to MMP activity at the stages of diabetes mellitus compensation and subcompensation was approximately 1:50, while at the stage of decompensation it was 1:12. Thus, the ratio of these blood serum parameters can be used as an additional diagnostic marker of diabetes decompensation and severity of its complications.