Chronic administration of EGb 761 modulates synaptic and mitochondrial plasticity in adult vitamin E-deficient rats.

Carlo Bertoni-Freddari, Patrizia Fattoretti, Ugo Caselli, Roberta Paoloni, Moreno Solazzi

Research output: Contribution to journalArticle

Abstract

A computer-assisted morphometric study has been carried out on synaptic junctions and synaptic mitochondria in the dentate gyrus supragranular layer of vitamin E-deficient rats undergone chronic administration of the extract EGb 761 from Ginkgo biloba leaves (100 mg/kg body weight, daily, from 4 to 7 months of age). Control animals were fed with the vitamin E-deficient diet from 1 to 7 months of age. Numeric density (Nv), surface density (Sv) and average size of the synaptic junctions (S), mitochondrial numeric density (Nvm), volume density (Vv) and average volume (V) were the measured parameters. In EGb 761-treated animals, Nv was significantly increased and S significantly decreased, while Sv was unchanged. EGb 761 administration resulted in an increased percentage of synapses of smaller size. In EGb 761-treated rats, Nvm significantly increased and V significantly decreased, while no significant difference of Vv was found. The population of synaptic mitochondria in EGb 761 -treated animals was composed of a higher number of smaller organelles. The measured parameters report on the structural dynamics of synapses and mitochondria, thus our findings support that EGb 761 administration is able to improve the physiological adaptive capacities of the investigated structures by a positive modulation of their morphofunctional features.

Original languageEnglish
Pages (from-to)709-715
Number of pages7
JournalCellular and Molecular Biology
Volume48
Issue number6
Publication statusPublished - Sep 2002

ASJC Scopus subject areas

  • Molecular Biology
  • Clinical Biochemistry
  • Cell Biology

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