Fine-structural changes of synapses in the superior cervical ganglion of adult rats after long-term administration of GABA - A morphometric analysis

Ferenc Joó, László Siklós, Wendelin Dames, Joachim R. Wolff

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

The superior cervical ganglion (SCG) of adult rats was exposed to γ-aminobutyric acid (GABA) by means of long-term microapplication. Serial sections were cut from GABA-treated and control ganglia, and subsequently the fine structure of individual synapses was investigated. The quantitative analysis of structural parameters of studied synapses showed that significant changes consisting of (1) a reduction in size of presynaptic axon terminals, (2) a decrease in the number of synaptic vesicles, and (3) a diminution in the extent of the postsynaptic membrane thickening at the dendritic side developed as an effect of GABA-treatment. These results provide morphological evidence that long-term application of GABA to the SCG exerts a combination of effects on both presynaptic and postsynaptic elements. It is suggested that the structural changes observed in the fine structure of individual synapses within the SCG may play an integral role in the development of the synaptogenetic action of GABA.

Original languageEnglish
Pages (from-to)267-275
Number of pages9
JournalCell And Tissue Research
Volume249
Issue number2
DOIs
Publication statusPublished - Aug 1 1987

Keywords

  • GABA-treatment
  • Morphometry
  • Rat
  • Superior cervical ganglion
  • Synaptic plasticity

ASJC Scopus subject areas

  • Pathology and Forensic Medicine
  • Histology
  • Cell Biology

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