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Original Articles

Role of Renal DJ-1 in the Pathogenesis of Hypertension Associated With Increased Reactive Oxygen Species Production

Santiago Cuevas, Yanrong Zhang, Yu Yang, Crisanto Escano, Laureano Asico, John E. Jones, Ines Armando, Pedro A. Jose
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https://doi.org/10.1161/HYPERTENSIONAHA.111.185744
Hypertension. 2012;HYPERTENSIONAHA.111.185744
Originally published January 3, 2012
Santiago Cuevas
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Yanrong Zhang
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Yu Yang
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Crisanto Escano
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Laureano Asico
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John E. Jones
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Ines Armando
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Pedro A. Jose
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Abstract

The D2 dopamine receptor (D2R) is important in the pathogenesis of essential hypertension. We have already reported that systemic deletion of the D2R gene in mice results in reactive oxygen species (ROS)-dependent hypertension, suggesting that the D2R has antioxidant effects. However, the mechanism of this effect is unknown. DJ-1 is a protein that has antioxidant properties. D2R and DJ-1 are expressed in the mouse kidney and colocalize and coimunoprecipitate in mouse renal proximal tubule cells. We hypothesized that D2Rs regulate renal ROS production in the kidney through regulation of DJ-1 expression or function. Heterozygous D2+/− mice have increased blood pressure, urinary 8-isoprostanes, and renal Nox 4 expression, but decreased renal DJ-1 expression. Silencing D2R expression in mouse renal proximal tubule cells increases ROS production and decreases the expression of DJ-1. Conversely, treatment of these cells with a D2R agonist increases DJ-1 expression and decreases Nox 4 expression and NADPH oxidase activity, effects that are partially blocked by a D2R antagonist. Silencing DJ-1 expression in mouse renal proximal tubule cells increases ROS production and Nox 4 expression. Selective renal DJ-1 silencing by the subcapsular infusion of DJ-1 siRNA in mice increases blood pressure, renal Nox4 expression, and NADPH oxidase activity. These results suggest that the inhibitory effects of D2R on renal ROS production are at least, in part, mediated by a positive regulation of DJ-1 expression/function and that DJ-1 may have a role in the prevention of hypertension associated with increased ROS production.

  • dopamine D2 receptor
  • DJ-1
  • hypertension
  • kidney
  • oxidative stress
  • Received October 10, 2011.
  • Revision received November 6, 2011.
  • Accepted December 6, 2011.
  • © 2012 American Heart Association, Inc.
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    Role of Renal DJ-1 in the Pathogenesis of Hypertension Associated With Increased Reactive Oxygen Species Production
    Santiago Cuevas, Yanrong Zhang, Yu Yang, Crisanto Escano, Laureano Asico, John E. Jones, Ines Armando and Pedro A. Jose
    Hypertension. 2012;HYPERTENSIONAHA.111.185744, originally published January 3, 2012
    https://doi.org/10.1161/HYPERTENSIONAHA.111.185744

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    Role of Renal DJ-1 in the Pathogenesis of Hypertension Associated With Increased Reactive Oxygen Species Production
    Santiago Cuevas, Yanrong Zhang, Yu Yang, Crisanto Escano, Laureano Asico, John E. Jones, Ines Armando and Pedro A. Jose
    Hypertension. 2012;HYPERTENSIONAHA.111.185744, originally published January 3, 2012
    https://doi.org/10.1161/HYPERTENSIONAHA.111.185744
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