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Effect of a hypertonic balanced ketone solution on plasma, CSF and brain beta-hydroxybutyrate levels and acid–base status
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Effect of a hypertonic balanced ketone solution on plasma, CSF and brain beta-hydroxybutyrate levels and acid–base status
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Journal Article
Effect of a hypertonic balanced ketone solution on plasma, CSF and brain beta-hydroxybutyrate levels and acid–base status
2013
Overview
Purpose
Although glucose is the main source of energy for the human brain, ketones play an important role during starvation or injury. The purpose of our study was to investigate the metabolic effects of a novel hypertonic sodium ketone solution in normal animals.
Methods
Adult Sprague–Dawley rats (420–570 g) were divided into three groups of five, one control and two study arms. The control group received an intravenous infusion of 3 % NaCl at 5 ml/kg/h. The animals in the two study arms were assigned to receive one of the two formulations of ketone solutions, containing hypertonic saline with 40 and 120 mmol/l beta-hydroxybutyrate, respectively. This was infused for 6 h and then the animal was euthanized and brains removed and frozen.
Results
Both blood and cerebrospinal fluid (CSF) levels of beta-hydroxybutyrate (BHB) demonstrated strong evidence of a change over time (
p
< 0.0001). There was also strong evidence of a difference between groups (
p
< 0.0001). Multiple comparisons showed all these means were statistically different (
p
< 0.05). Measurement of BHB levels in brain tissue found strong evidence of a difference between groups (
p
< 0.0001) with control: 0.15 mmol/l (0.01), BHB 40: 0.19 mmol/l (0.01), and BHB 120: 0.28 mmol/l (0.01). Multiple comparisons showed all these means were statistically different (
p
< 0.05). There were no differences over time (
p
= 0.31) or between groups (
p
= 0.33) or an interaction between groups and time (
p
= 0.47) for base excess.
Conclusion
The IV infusions of hypertonic saline/BHB are feasible and lead to increased plasma, CSF and brain levels of BHB without significant acid/base effects.
Publisher
Springer-Verlag,Springer,Springer Nature B.V
Subject
3-Hydroxybutyric Acid - administration & dosage
/ 3-Hydroxybutyric Acid - metabolism
/ Animals
/ Brain
/ Cerebrospinal Fluid - chemistry
/ Glucose
/ Ketones
/ Medicine
/ Plasma
/ Pneumology/Respiratory System
/ Rats
/ Saline Solution, Hypertonic - administration & dosage
/ Saline Solution, Hypertonic - metabolism
/ Sodium
