A novel technique that measures peptide secretion on a millisecond timescale reveals rapid changes in release

Neuron. 2001 Apr;30(1):37-50. doi: 10.1016/s0896-6273(01)00261-6.

Abstract

Neuropeptides are ubiquitous transmitters that have been implicated in a wide variety of physiological and pathological conditions, and it is important to understand the processes that control their secretion. We have developed a technique that measures neuropeptide secretion with high temporal resolution. This method involves placing an electrophysiological "tag" in a neuropeptide prohormone. The tagged prohormone is subsequently expressed together with an ionotropic receptor that binds the tag. Because the neuropeptide of interest and the tag enter the same population of dense core granules, neuropeptide secretion gives rise to fast, synaptic-like currents. Using this method, we show that peptide secretion can be modulated on a millisecond time scale. This technique could be readily adapted to measure the secretion of any neuropeptide.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Calcium Channels / drug effects
  • Calcium Channels / metabolism
  • Electric Stimulation
  • FMRFamide / genetics*
  • FMRFamide / metabolism
  • Membrane Potentials / drug effects
  • Membrane Potentials / physiology
  • Neuropeptide Y / biosynthesis
  • Neuropeptide Y / genetics
  • Neuropeptide Y / metabolism
  • Neuropeptides / metabolism*
  • Neurophysiology / methods*
  • Neurosecretion / drug effects
  • Neurosecretion / physiology*
  • Rats
  • Receptors, Invertebrate Peptide / drug effects
  • Receptors, Invertebrate Peptide / metabolism*
  • Signal Transduction / physiology
  • Synapses / drug effects
  • Synapses / metabolism*
  • Synaptic Transmission / physiology*
  • Time Factors

Substances

  • Calcium Channels
  • FMRFamide receptor
  • Neuropeptide Y
  • Neuropeptides
  • Receptors, Invertebrate Peptide
  • FMRFamide