Adrenergic modulation of interdigestive pancreatic secretion in humans

Peter H. Layer, Albert T H Chan, Vay Liang W Go, Alan R. Zinsmeister, Eugene P. DiMagno

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Abstract

Whether the adrenergic pathways participate in the control of interdigestive pancreatic function in humans is uncertain. To determine if changes in α-or β-adrenergic tone modulate interdigestive pancreatic enzyme output, 16 healthy subjects were intubated with an orojejunal tube to collect and quantify pancreatic trypsin secretion and record motility. After observation of a complete interdigestive cycle (control period), eight groups of two subjects each received 2-hour intravenous infusions of the α- and β-agonist epinephrine (50 ng · kg-1 · min-1), the α-antagonist phentolamine (5 mg/2 min followed by 500 μg/min), the β-antagonist propranolol (5 mg/2 min followed by 80 μg/min), or saline as control, alone or in combination. Drugs were assigned in a random mode according to a 23 factorial design. Analysis of variance showed that epinephrine decreased trypsin output by 43% (P < 0.05). By contrast, trypsin output was increased fourfold in the presence of phentolamine (P < 0.01), whereas propranolol had no effect. These data suggest that an inhibitory α-adrenergic tone modulates human interdigestive pancreatic enzyme secretion whereas β inputs are less important.

Original languageEnglish (US)
Pages (from-to)990-993
Number of pages4
JournalGastroenterology
Volume103
Issue number3
StatePublished - 1992

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ASJC Scopus subject areas

  • Gastroenterology

Cite this

Layer, P. H., Chan, A. T. H., Go, V. L. W., Zinsmeister, A. R., & DiMagno, E. P. (1992). Adrenergic modulation of interdigestive pancreatic secretion in humans. Gastroenterology, 103(3), 990-993.