Systematic Review - Neuroprotection of ketosis in acute injury of the mammalian central nervous system: a Meta-Analysis

Ivancarmine Gambardella*, Raimondo Ascione, Dominic P D'Agostino, Csilla Ari, Berhane Worku, Robert F Tranbaugh, Natalia Ivascu, Jonathan Villena-Vargas, Leonard N Girardi

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

Abstract

To evaluate the neuroprotection exerted by ketosis against acute damage of the mammalian central nervous system (CNS). Search engines were interrogated to identify experimental studies comparing the mitigating effect of ketosis (intervention) vs non‐ketosis (control) on acute CNS damage. Primary endpoint was a reduction in mortality. Secondary endpoints were a reduction in neuronal damage and dysfunction, and an “aggregated advantage” (composite of all primary and secondary endpoints). Hedge’s g was the effect measure. Subgroup analyses evaluated the modulatory effect of age, insult type, and injury site. Meta‐regression evaluated timing, type, and magnitude of intervention as predictors of neuroprotection. The selected publications were 49 experimental murine studies (period 1979‐2020). The intervention reduced mortality (g 2.45, SE 0.48, p <0.01), neuronal damage (g 1.96, SE 0.23, p <0.01) and dysfunction (g 0.99, SE 0.10, p <0.01). Reduction of mortality was particularly pronounced in the adult subgroup (g 2.71, SE 0.57, p <0.01). The aggregated advantage of ketosis was stronger in the pediatric (g 3.98, SE 0.71, p <0.01), brain (g 1.96, SE 0.18, p <0.01), and ischemic insult (g 2.20, SE 0.23, p <0.01) subgroups. Only the magnitude of intervention was a predictor of neuroprotection (g 0.07, SE 0.03, p 0.01 per every mmol/L increase in ketone levels). Ketosis exerts a potent neuroprotection against acute damage to the mammalian CNS in terms of reduction of mortality, of neuronal damage and dysfunction. Hematic levels of ketones are directly proportional to the effect size of neuroprotection.
Original languageEnglish
Pages (from-to)105-118
Number of pages14
JournalJournal of Neurochemistry
Volume158
Issue number2
Early online date6 Mar 2021
DOIs
Publication statusPublished - Jul 2021

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© 2021 International Society for Neurochemistry

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