Leptin modulates fast synaptic transmission in dog pancreatic ganglia

Lei Sha, Joseph H. Szurszewski

Research output: Contribution to journalArticle

11 Scopus citations

Abstract

The aim of this study was to determine whether leptin modulates neuronal activity in intrapancreatic ganglion neurons. Intracellular recordings were made in dog pancreatic neurons. Recombinant mouse leptin (313 nM) was added by superfusion. When leptin was present, fast EPSPs which were subthreshold in normal Krebs solution reached threshold for firing action potentials. However, leptin had no significant (P > 0.05, n = 18) effect on either the resting membrane potential or on membrane input resistance. To determine whether leptin increased the postsynaptic sensitivity to acetylcholine, the response was tested by pressure ejection of acetylcholine. Acetylcholine evoked a 9.4 ± 2.2 mV (mean ± SEM, n=5) depolarization in normal Krebs solution. In the presence of leptin, the response was not significantly different (9.6 ± 2.4 mV, P > 0.05). The results suggest that leptin modulates fast synaptic transmission in pancreatic ganglion neurons by acting on presynaptic nerve terminals.

Original languageEnglish (US)
Pages (from-to)93-96
Number of pages4
JournalNeuroscience Letters
Volume263
Issue number2-3
DOIs
StatePublished - Mar 26 1999

Keywords

  • Fast epsp
  • Intrapancreatic neuron
  • Leptin

ASJC Scopus subject areas

  • Neuroscience(all)

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