Molecular and Cellular Biochemistry

, Volume 293, Issue 1–2, pp 47–52

Tactile stimulation-induced rapid elevation of the synaptophysin mRNA expression level in rat somatosensory cortex

  • Osamu Yokoyama
  • Mari Kumashiro
  • Atsushi Iriki
  • Hidetoshi Ishibashi
Article

Abstract

Synaptophysin is an integral membrane protein abundant in the synaptic vesicle and is found in nerve terminals throughout the brain. It was recently suggested that synaptophysin is also involved in the modulation of activity-dependent synapse formation. In this study, we examined at the individual level whether tactile stimulation selectively influenced the synaptophysin mRNA expression level in the somatosensory cortex of rats. Anesthetized rats were caressed on the back by an experimenter's palms for 20 min and the mRNA expression levels in the somatosensory and the visual cortices 5 min afterwards were determined using quantitative PCR methodology. The synaptophysin mRNA expression level was selectively higher in the experimental group than in the control group in the somatosensory cortex but not in the visual cortex. This suggests that the mRNA expression level of synaptophysin induced by neuronal activity is related to the regulation of synapse formation or remodeling or both.

Keywords

activity plasticity somatosensory cortex synaptophysin 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Copyright information

© Springer Science + Business Media, Inc. 2006

Authors and Affiliations

  • Osamu Yokoyama
    • 1
    • 2
  • Mari Kumashiro
    • 1
  • Atsushi Iriki
    • 1
  • Hidetoshi Ishibashi
    • 1
  1. 1.Section of Cognitive Neurobiology, Department of Maxillofacial BiologyTokyo Medical and Dental UniversityTokyoJapan
  2. 2.Department of Maxillofacial Biology, Section of Cognitive NeurobiologyTokyo Medical and Dental UniversityTokyoJapan

Personalised recommendations