title: Temperature dependence of synaptic modulation by a FMRFamide-related neuropeptide in crayfish.
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.
authors.affiliation: Department of Biological Sciences, Brock University, St. Catharines ON, Canada.
authors.forename: R W
authors.initials: RW
authors.lastname: Friedrich
authors.forename: P A
authors.initials: PA
authors.lastname: Quigley
authors.forename: M
authors.initials: M
authors.lastname: Srivastava
authors.forename: M
authors.initials: M
authors.lastname: Skerrett
authors.forename: A J
authors.initials: AJ
authors.lastname: Mercier
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D003400:Astacoidea / Q000502:physiology*; D005071:Evoked Potentials / Q000502:physiology; D019835:FMRFamide; D008969:Molecular Sequence Data; D009132:Muscles / Q000294:innervation / Q000502:physiology; D009479:Neuropeptides / Q000502:physiology*; D018377:Neurotransmitter Agents / Q000502:physiology*; D013569:Synapses / Q000502:physiology*; D013696:Temperature
chemical_list: D009479:Neuropeptides; D018377:Neurotransmitter Agents; C088642:neuropeptide DF2; D019835:FMRFamide