Journal of Neurocytology

, Volume 11, Issue 2, pp 183–210

Effect of anisomycin on stimulation-induced changes in dendritic spines of the dentate granule cells

  • Eva Fifková
  • Carol L. Anderson
  • S. J. Young
  • A. Van Harreveld
Article

DOI: 10.1007/BF01258243

Cite this article as:
Fifková, E., Anderson, C.L., Young, S.J. et al. J Neurocytol (1982) 11: 183. doi:10.1007/BF01258243

Summary

Tetanic stimulation of the entorhinal area induces significant enlargement of the average dendritic spine area and perimeter in the middle and distal thirds of the dentate molecular layer 4 and 90 min following stimulation. Four minutes after stimulation, the differences between the stimulated and control animals were 20% for the dendritic spine area and 9% for the perimeter in the middle third, and in the distal third 32 and 14%, respectively. Ninety minutes after stimulation the differences were 28 and 11% for the area and perimeter in the middle third, and 33 and 18% in the distal third, respectively. Anisomycin at a dose of 25 mg/kg had no significant effect on the average spine area or perimeter in the various thirds of the dentate molecular layer in the 19 and 105 min post-application intervals. This dose of anisomycin given 15 min prior to the stimulation suppresses the stimulation-induced spine changes in the 4 min interval. In the 90 min interval when the effect of anisomycin on protein synthesis is largely terminated, spine enlargement reappears, being 21% higher than the controls in the middle and distal thirds. The differential effect of anisomycin on dendritic spines in the two post-stimulation intervals is discussed in relation to the effect of anisomycin on protein synthesis. The present experiments thus demonstrate that the stimulation-induced spine enlargement in the dentate fascia can be suppressed by a protein synthesis blocking drug.

Copyright information

© Chapman and Hall Ltd 1982

Authors and Affiliations

  • Eva Fifková
    • 1
  • Carol L. Anderson
    • 1
  • S. J. Young
    • 2
  • A. Van Harreveld
    • 3
  1. 1.Department of PsychologyUniversity of ColoradoBoulderUSA
  2. 2.Department of PsychiatryUniversity of California at San DiegoLa JollaUSA
  3. 3.Division of BiologyCalifornia Institute of TechnologyPasadenaUSA