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      Phenotypic Modifications of Human Mesangial Cells by Extracellular Matrix: The Importance of Matrix in the Contractile Response to Reactive Oxygen Species

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          The progression of chronic renal diseases is characterized by the accumulation of extracellular matrix proteins in the glomerulus. The present experiments were designed to analyze the effect of hydrogen peroxide on the contractile and proliferative phenotypes of human mesangial cells grown on different culture substrates: plastic, collagen type I, and collagen type IV. Contraction was analyzed by measuring planar cell surface area and myosin light chain phosphorylation, whereas proliferation was studied by [<sup>3</sup>H]thymidine incorporation. No changes were detected in the proliferation rate of human mesangial cells grown on different culture substrates, neither under basal conditions nor in the presence of fetal calf serum or H<sub>2</sub>O<sub>2</sub>. Cells grown on plastic or collagen did not contract in the presence of H<sub>2</sub>O<sub>2</sub>, but cells grown on collagen I elicited a significant contraction with H<sub>2</sub>O<sub>2</sub>. Platelet-activating factor induced contraction of human mesangial cells on the three culture substrates. The different contractile responses observed were not due to different degradation rates of H<sub>2</sub>O<sub>2</sub>. The present experiments support the importance of extracellular matrix in the response to exogenous stimuli and point to the possibility that patients with changes in the mesangial matrix as a result of chronic renal diseases may have an increased susceptibility to the pathological actions of reactive oxygen species.

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          Most cited references 2

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          In Vivo Transfection of Genes for Renin and Angiotensinogen into the Glomerular Cells Induced Phenotypic Change of the Mesangial Cells and Glomerular Sclerosis

           M. Arai,  A Wada,  Y Isaka (1995)
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            • Abstract: not found
            • Article: not found

            A Dual Effect of Somatostatin on the Proliferation of Cultured Rat Mesangial Cells


              Author and article information

              Nephron Exp Nephrol
              Cardiorenal Medicine
              S. Karger AG
              April 2000
              15 March 2000
              : 8
              : 2
              : 97-103
              Departments of aPhysiology and bMedicine, Alcalá University, and cNephrology Section, ‘Príncipe de Asturias’ Hospital, Alcalá de Henares, Spain
              20655 Exp Nephrol 2000;8:97–103
              © 2000 S. Karger AG, Basel

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              Page count
              Figures: 6, References: 36, Pages: 7
              Self URI (application/pdf): https://www.karger.com/Article/Pdf/20655
              Original Paper


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