Anxiolytic action of pterostilbene: Involvement of hippocampal ERK phosphorylation

Md Al Rahim, Agnes M. Rimando, Kalpten Silistreli, Abir T. El-Alfy

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

Pterostilbene, a natural analog of resveratrol, has diverse health-beneficial properties. However, the neurological activities of this compound are largely unexplored. Here, we report that pterostilbene shows anxiolytic-like actions by down-regulating phosphorylated levels of extracellular regulated kinases in the hippocampus of mice. Adult male mice administered pterostilbene (1-10 mg/kg, p. o.) were subjected to the elevated plus maze test. Pterostilbene manifested anxiolytic activity at 1 and 2 mg/kg doses, demonstrated by increases in % permanence time and number of open arm entries. The locomotor activity of the animals was unaffected at all doses. Western blot analysis revealed a decrease in both extracellular regulated kinase1 and extracellular regulated kinase 2 phosphorylation in hippocampal homogenates from mice treated with 1 and 2 mg/kg pterostilbene. Moreover, pterostilbene was detected in the plasma and brains of mice following single oral administration. Anxiolytic activity was not observed at the higher doses (5 and 10 mg/kg). However, no impairment of motor function was observed either, suggesting a favorable safety index for the compound. These results suggest that pterostilbene has the potential for therapeutic drug development for anxiety disorders.

Original languageEnglish
Pages (from-to)723-730
Number of pages8
JournalPlanta Medica
Volume79
Issue number9
DOIs
StatePublished - 2013
Externally publishedYes

Keywords

  • ERK phosphorylation
  • anxiolytic activity
  • elevated plus maze
  • hippocampus
  • pterostilbene

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