The phosphatase inhibitor, okadaic acid, increases peptide release from rat sensory neurons in culture

Cynthia M. Hingtgen, Michael Vasko

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

We examined the effects of the phosphatase inhibitor, okadaic acid, on substance P and calcitonin gene-related peptide release from embryonic rat sensory neurons grown in culture. Exposing isolated sensory neurons to 500 or 1000 nM okadaic acid for 30 min resulted in a 2- to 5-fold increase in the release of either peptide above resting levels and this evoked release was dependent on extracellular calcium. Treating sensory neurons with 250 nM okadaic acid did not alter resting peptide release, but significantly enhanced peptide release evoked by either 50 nM capsaicin, 100 nM bradykinin, or 30 mM KC1. These results suggest that enhancing phosphorylation in sensory neurons is an important component in augmenting transmitter release.

Original languageEnglish
Pages (from-to)135-138
Number of pages4
JournalNeuroscience Letters
Volume178
Issue number1
DOIs
StatePublished - Aug 29 1994

Fingerprint

Okadaic Acid
Sensory Receptor Cells
Phosphoric Monoester Hydrolases
Peptides
Calcitonin Gene-Related Peptide
Capsaicin
Bradykinin
Substance P
Phosphorylation
Calcium

Keywords

  • Bradykinin
  • Calcitonin gene-related peptide
  • Capsaicin
  • Okadaic acid
  • Release mechanism
  • Sensory neuron
  • Substance P

ASJC Scopus subject areas

  • Neuroscience(all)

Cite this

The phosphatase inhibitor, okadaic acid, increases peptide release from rat sensory neurons in culture. / Hingtgen, Cynthia M.; Vasko, Michael.

In: Neuroscience Letters, Vol. 178, No. 1, 29.08.1994, p. 135-138.

Research output: Contribution to journalArticle

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