AJP - Renal Physiology, Vol 263, Issue 3 466-F473, Copyright © 1992 by American Physiological Society

ARTICLES

Effects of reactive oxygen species on cultured rat mesangial cells and isolated rat glomeruli

I. Duque, C. Garcia-Escribano, M. Rodriguez-Puyol, M. L. Diez-Marques, J. M. Lopez-Novoa, I. Arribas, L. Hernando and D. Rodriguez-Puyol
University Hospital, Madrid, Spain.

The effects of reactive oxygen species (ROS) on cultured rat mesangial cells were studied by measuring planar cell surface area (PCSA) after incubation with xanthine plus xanthine oxidase (XXO), in the presence of superoxide dismutase (SOD; 5 micrograms/ml) or catalase (CAT; 20 micrograms/ml), or after incubation with H2O2. Myosin light chain (MLC) phosphorylation was assessed in cells prelabeled with o-[32P]phosphoric acid and incubated with H2O2, after protein separation with sodium dodecyl sulfate-polyacrylamide gel electrophoresis. A possible intermediate role for platelet-activating factor (PAF) was analyzed by preincubation of the cells with a PAF antagonist BN 52021 (BN, 5 x 10(-5) M) and by measuring PAF-specific [3H]acetate incorporation and immunoassayable PAF. XXO significantly decreased PCSA (14%), an effect abolished by CAT but not by SOD. H2O2 induced a similar effect, in a dose-dependent and time-dependent manner. MLC phosphorylation increased by 81 +/- 15% after H2O2 incubation, and this effect was blocked by BN. BN also completely blocked the effect of H2O2 on PCSA. PAF-specific [3H]acetate incorporation increased in the presence of H2O2 (from 6,886 +/- 2,030 to 58,703 +/- 16,063 counts.min-1.mg-1) as well as the immunoassayable PAF production by cells (from 0.90 +/- 0.19 to 6.71 +/- 2.27 ng/mg). These results suggest that ROS, particularly H2O2, could modulate the surface area of mesangial cells, modifying the ultrafiltration coefficient, thus explaining the decrease in glomerular filtration rate in those pathological situations characterized by an increased ROS synthesis. PAF could be involved in the genesis of these effects.

This article has been cited by other articles:

				K. Sharma, A. Cook, M. Smith, C. Valancius, and E. W. Inscho TGF-{beta} impairs renal autoregulation via generation of ROS Am J Physiol Renal Physiol, May 1, 2005; 288(5): F1069 - F1077. [Abstract] [Full Text] [PDF]

				F. R. Gonzalez-Pacheco, C. Caramelo, M. A. Castilla, J. J. P. Deudero, J. Arias, S. Yague, S. Jimenez, R. Bragado, and M. V. Alvarez-Arroyo Mechanism of vascular smooth muscle cells activation by hydrogen peroxide: role of phospholipase C gamma Nephrol. Dial. Transplant., March 1, 2002; 17(3): 392 - 398. [Abstract] [Full Text] [PDF]

				G. Torrecillas, M. d. C. Boyano-Adánez, J. Medina, T. Parra, M. Griera, S. López-Ongil, E. Arilla, M. Rodríguez-Puyol, and D. Rodríguez-Puyol The Role of Hydrogen Peroxide in the Contractile Response to Angiotensin II Mol. Pharmacol., January 1, 2001; 59(1): 104 - 112. [Abstract] [Full Text]

				R. J. Bosch, P. Rojo-Linares, G. Torrecillas-Casamayor, M. C. Iglesias-Cruz, D. Rodriguez-Puyol, and M. Rodriguez-Puyol Effects of parathyroid hormone-related protein on human mesangial cells in culture Am J Physiol Endocrinol Metab, December 1, 1999; 277(6): E990 - E995. [Abstract] [Full Text] [PDF]

				S. FRANK, K. ZACHAROWSKI, G. M. WRAY, C. THIEMERMANN, and J. PFEILSCHIFTER Identification of copper/zinc superoxide dismutase as a novel nitric oxide-regulated gene in rat glomerular mesangial cells and kidneys of endotoxemic rats FASEB J, May 1, 1999; 13(8): 869 - 882. [Abstract] [Full Text]