Glucagon-like peptide-1 does not mediate amylase release from AR42J cells

J. Zhou, C. Montrose-Rafizadeh, A. M. Janczewski, M. A. Pineyro, S. J. Sollott, Y. Wang, J. M. Egan

Research output: Contribution to journalArticlepeer-review

Abstract

In this study, AR42J pancreatic acinar cells were used to investigate if glucagon-like peptide-1 (GLP-1) or glucagon might influence amylase release and acinar cell function. We first confirmed the presence of GLP-1 receptors on AR42J cells by reverse transcriptase-polymerase chain reaction (RT-PCR), Western blotting, and partial sequencing analysis. While cholecystokinin (CCK) increased amylase release from AR42J cells, GLP-1, alone or in the presence of CCK, had no effect on amylase release but both CCK and GLP-1 increased intracellular calcium. Similar to GLP-1, glucagon increased both cyclic adenosine monophosphate (cAMP) and intracellular calcium in AR42J cells but it actually decreased CCK-mediated amylase release (n = 20, P <0.01). CCK stimulation resulted in an increase in tyrosine phosphorylation of several cellular proteins, unlike GLP-1 treatment, where no such increased phosphorylation was seen. Instead, GLP-1 decreased such protein phosphorylations. Genestein blocked CCK-induced phosphorylation events and amylase secretion while vanadate increased amylase secretion. These results provide evidence that tyrosine phosphorylation is necessary for amylase release and that signaling through GLP-1 receptors does not mediate amylase release in AR42J cells.

Original languageEnglish (US)
Pages (from-to)470-478
Number of pages9
JournalJournal of Cellular Physiology
Volume181
Issue number3
DOIs
StatePublished - 1999
Externally publishedYes

ASJC Scopus subject areas

  • Clinical Biochemistry
  • Cell Biology
  • Physiology

Fingerprint

Dive into the research topics of 'Glucagon-like peptide-1 does not mediate amylase release from AR42J cells'. Together they form a unique fingerprint.

Cite this