Concentration of stimulant regulates initial exocytotic molecular plasticity at single cells

Xiulan He, Andrew G. Ewing

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


Activity-induced synaptic plasticity has been intensively studied, but is not yet well understood. We examined the temporal and concentration effects of exocytotic molecular plasticity during and immediately after chemical stimulation (30 s K+ stimulation) via single cell amperometry. Here the first and the second 15 s event periods from individual event traces were compared. Remarkably, we found that the amount of catecholamine release and release dynamics depend on the stimulant concentration. No changes were observed at 10 mM K+ stimulation, but changes observed at 30 and 50 mM (i.e., potentiation, increased number of molecules) were opposite to those at 100 mM (i.e., depression, decreased number of events), revealing changes in exocytotic plasticity based on the concentration of the stimulant solution. These results show that molecular changes initiating exocytotic plasticity can be regulated by the concentration strength of the stimulant solution. These different effects on early plasticity offer a possible link between stimulation intensity and synaptic (or adrenal) plasticity.

Original languageEnglish (US)
Pages (from-to)1815-1822
Number of pages8
JournalChemical Science
Issue number6
StatePublished - Feb 14 2022

All Science Journal Classification (ASJC) codes

  • Chemistry(all)


Dive into the research topics of 'Concentration of stimulant regulates initial exocytotic molecular plasticity at single cells'. Together they form a unique fingerprint.

Cite this