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13 December 2016 : Animal Research  

Potassium Aspartate Attenuates Brain Injury Induced by Controlled Cortical Impact in Rats Through Increasing Adenosine Triphosphate (ATP) Levels, Na+/K+-ATPase Activity and Reducing Brain Edema

Yi Gu1ABCDEF, Jie Zhang2ABCDEF, Yumei Zhao1BDE, Yujin Su3BE, Yazhuo Zhang1AG*

DOI: 10.12659/MSM.898185

Med Sci Monit 2016; 22:4894-4901

Abstract

BACKGROUND: Potassium aspartate (PA), as an electrolyte supplement, is widely used in clinical practice. In our previous study, we found PA had neuroprotective effects against apoptosis after cerebral ischemia/reperfusion in rats. In this study, we examine whether PA has protective effects on traumatic brain injury (TBI).

MATERIAL AND METHODS: TBI was induced by controlled cortical impact (CCI) in rats. Vehicle treatment (control) or PA treatment was administered intraperitoneally at 30 minutes after CCI. The modified neurological severity score (mNSS) and cortical lesion volume were examined. Brain edema and blood-brain barrier (BBB) integrity were measured, as well as brain ATP contents, lactic acid levels, and Na+/K+-ATPase activities.

RESULTS: We found that CCI induced cortical injury in rats. Acute PA treatment at the dose of 62.5 mg/kg and 125 mg/kg significantly improved neurological deficits (p<0.05 and p<0.001, respectively) and decreased the cortical lesion volume (p<0.05 and p<0.001, respectively) compared with vehicle-only treatment. PA treatment at the dose of 125 mg/kg attenuated brain edema and ameliorated BBB integrity. In addition, PA treatment significantly reduced the loss of ATP (p<0.01), reduced lactic acid levels (p<0.001), and increased the activity of Na+/K+-ATPase (p<0.01).

CONCLUSIONS: Our results indicate PA has neuroprotective effects on TBI through increasing ATP levels, Na+/K+-ATPase activity, and reducing brain edema. It provides experimental evidence for the clinical application of PA.

Keywords: Adenosine Triphosphate - metabolism, Aspartic Acid - pharmacology, Blood-Brain Barrier - drug effects, Brain Injuries, Traumatic - metabolism, Neuroprotective Agents - pharmacology, Random Allocation

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Medical Science Monitor eISSN: 1643-3750
Medical Science Monitor eISSN: 1643-3750