Effect of high glucose on the expression of matrix metalloproteinase 2 and its inhibitors in human peritoneal mesothelial cells / 中华肾脏病杂志

ABSTRACT

Objective To study the gene and protein expression of matrix metalloproteinase 2 (MMP2) and its inhibitors TIMP1 and TIMP2 in human peritoneal mesothelial cells (HPMC), and the possible role of high glucose in submesothelial extracellular matrix (ECM) degradation during peritoneal dialysis (PD) . Methods Primary HPMC was isolated from spent peritoneal dialysis effluent collected from PD patients. After HPMC confluence, the cells were detached by trypsinization and passaged into 25 cm2 tissue-culture flasks. The effect of high glucose and hyperosmolarity on the gene expression of MMP2, TIMP1 and TIMP2 in HPMC was studied by semi-quantitative RT-PCR. Immunohistochemistry and zymography were used to measure the protein expression of MMP/TIMP in HPMC. Results HPMC expressed MMP2, TIMP1, TIMP2 at both gene and protein levels. 4. 25% glucose significantly up-regulated TIMP1 gene expression in HPMC( P