Rapid isolation of synaptoneurosomes and postsynaptic densities from adult mouse hippocampus

Laura Elena Villasana, Eric Klann, Maria Victoria Tejada-Simon

Research output: Contribution to journalArticle

Abstract

Previous postsynaptic density (PSD) isolation methodologies have utilized either whole brain or discrete brain regions of relatively large mammals such as dogs and rats. The present report details a simple and highly effective procedure for the rapid isolation of PSDs from small amounts of adult mouse hippocampus that has several advantages. First, by substituting synaptoneurosomes for synaptosomes as starting material, we have decreased the steps, time, and amount of tissue required to isolate PSDs. Second, by modifying critical steps in the synaptic isolation protocols we were able to isolate PSDs from less than 200 mg of mouse hippocampi in 3 h. Electron micrographs of isolated synaptoneurosomes showed presynaptic vesicles and densely stained membranes representing PSDs. Morphological examination of these PSDs by electron microscopy revealed a preparation that seems to be quite pure, with little or no membrane contamination. A comparison by Western blot analysis of synaptoneurosome and PSD fractions suggests that this technique yields a purified sample. Moreover, two different protocols using swing and fixed bucket rotors were used for this small-scale PSD isolation and both resulted in a very pure partition, supporting the idea that this procedure is reliable and consistent.

Original languageEnglish (US)
Pages (from-to)30-36
Number of pages7
JournalJournal of Neuroscience Methods
Volume158
Issue number1
DOIs
StatePublished - Nov 15 2006

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Post-Synaptic Density
Hippocampus
Membranes
Synaptosomes
Brain
Mammals
Electron Microscopy
Western Blotting
Dogs
Electrons

Keywords

  • Electron microscopy
  • Hippocampus
  • Mouse
  • Postsynaptic densities
  • PSD95
  • Synaptoneurosomes
  • Synaptotagmin

ASJC Scopus subject areas

  • Neuroscience(all)

Cite this

Rapid isolation of synaptoneurosomes and postsynaptic densities from adult mouse hippocampus. / Villasana, Laura Elena; Klann, Eric; Tejada-Simon, Maria Victoria.

In: Journal of Neuroscience Methods, Vol. 158, No. 1, 15.11.2006, p. 30-36.

Research output: Contribution to journalArticle

Villasana, Laura Elena ; Klann, Eric ; Tejada-Simon, Maria Victoria. / Rapid isolation of synaptoneurosomes and postsynaptic densities from adult mouse hippocampus. In: Journal of Neuroscience Methods. 2006 ; Vol. 158, No. 1. pp. 30-36.
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