Mass spectrometric imaging of plasma membrane lipid alteration correlated with amperometrically measured activity-dependent plasticity in exocytosis

Chaoyi Gu, Mai H. Philipsen, Andrew G. Ewing

Research output: Contribution to journalArticlepeer-review

Abstract

The mechanism of synaptic plasticity and its link to memory formation are of interest, yet relatively obscure, especially the initial chemical change in the cell membrane following transmitter release. To understand the chemical mechanism of plasticity, we studied how repetitive stimuli regulate certain membrane lipid species to enhance exocytotic release using mass spectrometric imaging. We found that increasing high-curvature lipid species and decreasing low-curvature lipids in the cell membrane favor the formation of a longer-lasting exocytotic fusion pore, resulting in higher release fraction for individual exocytotic events. The lipid changes observed following repetitive stimuli are similar to those after exposure to the cognitive enhancing drug, methylphenidate, examined in a previous study, and offer an interesting point of view regarding the link between plasticity and memory and cognition.

Original languageEnglish (US)
Article number9519
Pages (from-to)1-10
Number of pages10
JournalInternational journal of molecular sciences
Volume21
Issue number24
DOIs
StatePublished - Dec 2 2020

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Molecular Biology
  • Spectroscopy
  • Computer Science Applications
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry

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