Temperature dependence of synaptic modulation by a FMRFamide-related neuropeptide in crayfish

Neurosci Lett. 1994 Mar 14;169(1-2):56-8. doi: 10.1016/0304-3940(94)90355-7.

Abstract

The present study examined the temperature dependence of synaptic transmission and peptidergic modulation of chemical synapses on the phasic abdominal extensor muscles of crayfish. Decreasing the temperature from 25 degrees C to 5 degrees C in saline, decreased the EPSP amplitude by 88% and increased the EPSP half-decay time four-fold. The putative neurohormone DRNFLRFamide (DF2) increased EPSP amplitudes, but was more effective at 7-9 degrees C than at 15-17 degrees C. DF2 might play a hormonal role in counteracting low transmitter release at low temperature.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Amino Acid Sequence
  • Animals
  • Astacoidea / physiology*
  • Evoked Potentials / physiology
  • FMRFamide
  • Molecular Sequence Data
  • Muscles / innervation
  • Muscles / physiology
  • Neuropeptides / physiology*
  • Neurotransmitter Agents / physiology*
  • Synapses / physiology*
  • Temperature

Substances

  • Neuropeptides
  • Neurotransmitter Agents
  • neuropeptide DF2
  • FMRFamide