Abstract
Oxidative stress induced by hemorrhagic shock (HS) initiates a systemic inflammatory response, which leads to subsequent kidney injury. This study assessed the efficacy of c-type natriuretic peptide (CNP) in attenuating kidney injury in a rat model of hemorrhagic shock and resuscitation (HS/R). Sodium pentobarbital-anesthetized adult male Wistar rats underwent HS induced by the withdrawal of blood to a mean arterial pressure of 30–35 mmHg for 50 min. Then, the animals received CNP (25 μg/kg) or vehicle (saline) intravenously, followed byresuscitation with 1.5 times the shed blood volume in the form of normal saline. Mean arterial pressure was measured throughout the experiment, and acid–base status, oxidative stress, inflammation, tissue injury and kidney function were evaluated after resuscitation. CNP infusion reduced the malondialdehyde content, lowered the myeloperoxidase activity and decreased the expression of tumor necrosis factor (TNF)-α, interleukin (IL)-6, and IL-1β in the kidney. The histologic injury score and the plasma creatinine concentration were also significantly decreased after CNP treatment compared to the vehicle group. CNP treatment ameliorates oxidative stress, the inflammatory response, and consequently acute kidney injury after HS/R. Thus, CNP may represent a promising strategy to improve resuscitation for the treatment of HS and deserves further investigation.
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This work was supported by Grants from the Youth Science Fund of AMMS (No. 2015CXJJ22) and the National Natural Science Foundation of China (No. 81300751 and 81600148).
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Handling Editor: J. D. Wade.
G. Chen, X. Song and Y. Yin contributed equally to this work.
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Chen, G., Song, X., Yin, Y. et al. C-type natriuretic peptide prevents kidney injury and attenuates oxidative and inflammatory responses in hemorrhagic shock. Amino Acids 49, 347–354 (2017). https://doi.org/10.1007/s00726-016-2367-0
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DOI: https://doi.org/10.1007/s00726-016-2367-0