Advanced glycation end products regulate extracellular matrix protein and protease expression by human glomerular mesangial cells

Berrou, J; Tostivint, I; Verrecchia, F; Berthier, C; Boulanger, E; Mauviel, A; Marti, H P; Wautier, M P; Wautier, J L; Rondeau, E; Hertig, A (2009). Advanced glycation end products regulate extracellular matrix protein and protease expression by human glomerular mesangial cells. International journal of molecular medicine, 23(4), pp. 513-20. Athens: Spandidos Publications 10.3892/ijmm_00000159

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Advanced glycation end products (AGEs) may play a role in the pathogenesis of diabetic nephropathy, by modulating extracellular matrix turnover. AGEs are known to activate specific membrane receptors, including the receptor for AGE (RAGE). In the present study, we analyzed the various receptors for AGEs expressed by human mesangial cells and we studied the effects of glycated albumin and of carboxymethyl lysine on matrix protein and remodelling enzyme synthesis. Membrane RAGE expression was confirmed by FACS analysis. Microarray methods, RT-PCR, and Northern blot analysis were used to detect and confirm specific gene induction. Zymographic analysis and ELISA were used to measure the induction of tPA and PAI-1. We show herein that cultured human mesangial cells express AGE receptor type 1, type 2 and type 3 and RAGE. AGEs (200 microg/ml) induced at least a 2-fold increase in mRNA for 10 genes involved in ECM remodelling, including tPA, PAI-1 and TIMP-3. The increase in tPA synthesis was confirmed by fibrin zymography. The stimulation of PAI-1 synthesis was confirmed by ELISA. AGEs increased PAI-1 mRNA through a signalling pathway involving reactive oxygen species, the MAP kinases ERK-1/ERK-2 and the nuclear transcription factor NF-kappaB, but not AP-1. Carboxymethyl lysine (CML, 5 microM), which is a RAGE ligand, also stimulated PAI-1 synthesis by mesangial cells. In addition, a blocking anti-RAGE antibody partially inhibited the AGE-stimulated gene expression and decreased the PAI-1 accumulation induced by AGEs and by CML. Inhibition of AGE receptors or neutralization of the protease inhibitors TIMP-3 and PAI-1 could represent an important new therapeutic strategy for diabetic nephropathy.

Item Type:	Journal Article (Original Article)
Division/Institute:	04 Faculty of Medicine > Department of Dermatology, Urology, Rheumatology, Nephrology, Osteoporosis (DURN) > Clinic of Nephrology and Hypertension
UniBE Contributor:	Marti, Hans-Peter
ISSN:	1107-3756
Publisher:	Spandidos Publications
Language:	English
Submitter:	Factscience Import
Date Deposited:	04 Oct 2013 15:14
Last Modified:	05 Dec 2022 14:22
Publisher DOI:	10.3892/ijmm_00000159
PubMed ID:	19288028
Web of Science ID:	000264777400011
URI:	https://boris.unibe.ch/id/eprint/32426 (FactScience: 197605)