Please use this identifier to cite or link to this item: https://repositorio.unifesp.br/handle/11600/8771
Title: Resveratrol inhibits the intracellular calcium increase and angiotensin/endothelin system activation induced by soluble uric acid in mesangial cells
Authors: Albertoni, Guilherme Ambrozio [UNIFESP]
Schor, Nestor [UNIFESP]
Universidade Federal de São Paulo (UNIFESP)
Keywords: Resveratrol
Intracellular calcium
Angiotensin
Endothelin
Mesangial cells
Uric acid
Issue Date: 1-Jan-2015
Publisher: Associação Brasileira de Divulgação Científica
Citation: Brazilian Journal of Medical and Biological Research. Associação Brasileira de Divulgação Científica, v. 48, n. 1, p. 51-56, 2015.
Abstract: Resveratrol (Resv) is natural polyphenol found in grapes. This study evaluated the protective effect of Resv against the effects of uric acid (UA) in immortalized human mesangial cells (ihMCs). ihMCs were preincubated with Resv (12.5 µM) for 1 h and treated with UA (10 mg/dL) for 6 or 12 h. The intracellular calcium concentration [Ca2+]i was quantified by fluorescence using flow cytometry. Angiotensinogen (AGT) and pre-pro endothelin-1 (ppET-1) mRNA were assayed by quantitative real-time RT-PCR. Angiotensin II (AII) and endothelin-1 (ET-1) were assayed by ELISA. UA significantly increased [Ca2+]i. Pre-incubation with Resv significantly reduced the change in [Ca2+]i induced by UA. Incubation with UA for 6 or 12 h also increased AGT mRNA expression and AII protein synthesis. Resv blunted these increases in AGT mRNA expression and AII protein. Incubation with UA in the ihMCs increased ppET-1 expression and ET-1 protein synthesis at 6 and 12 h. When ihMCs were pre-incubated with Resv, UA had a significantly diminished effect on ppET-1 mRNA expression and ET-1 protein synthesis at 6 and 12 h, respectively. Our results suggested that UA triggers reactions including AII and ET-1 production in mesangial cells. The renin-angiotensin system may contribute to the pathogenesis of renal function and chronic kidney disease. Resv can minimize the impact of UA on AII, ET-1 and the increase of [Ca2+]i in mesangial cells, suggesting that, at least in part, Resv can prevent the effects of soluble UA in mesangial cells.
URI: http://repositorio.unifesp.br/handle/11600/8771
ISSN: 0100-879X
Other Identifiers: http://dx.doi.org/10.1590/1414-431X20144032
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