Pulmonary alveolar type II cells isolated from rats. Release of phosphatidylcholine in response to beta-adrenergic stimulation

The Journal of Clinical Investigation
L G Dobbs, R J Mason

Abstract

It is unclear what factors control the secretion of pulmonary surface active material from alveolar type II cells in vivo. Other workers have suggested that cholinergic stimuli, adrenergic stimuli, and prostaglandins may all stimulate secretion. We isolated type II cells from the lungs of rats by treatment with elastase, discontinuous density centrifugation, and adherence in primary culture. beta-Adrenergic agonists, but not cholinergic agonists, caused an increase in the release of [(14)C]disaturated phosphatidylcholine, the major component of surface-active material, from type II cells in culture. The beta-adrenergic effect was stereo-selective, (-)-isoproterenol being 50 times more potent than (+)-isoproterenol. Terbutaline, 10 muM, a noncatecholamine beta-2 adrenergic agonist, caused a release of 2.0+/-0.5 (mean+/-SD) times the basal release of [(14)C]disaturated phosphatidylcholine in 3 h; the concentration of terbutaline causing half maximal stimulation was 800 nM. The terbutaline effect was blocked by propranolol, a beta-adrenergic antagonist (calculated K(d) = 6 nM), but not by phentolamine, an alpha-adrenergic antagonist. Isobutylmethylxanthine, a phosphodiesterase inhibitor, and 8-Br cyclic AMP, but not 8-Br cyclic gu...Continue Reading

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Citations

Jan 1, 1992·The Clinical Investigator·H Wirtz, M Schmidt
Oct 1, 1992·Digestive Diseases and Sciences·H NishisakiM Kasuga
Jun 23, 1980·Biochimica Et Biophysica Acta·L G DobbsR J Mason
May 22, 1981·Biochimica Et Biophysica Acta·P A Marino, S A Rooney
Jun 27, 1986·Biochimica Et Biophysica Acta·L G DobbsS Hawgood
Mar 21, 1986·Biochimica Et Biophysica Acta·A M Gilfillan, S A Rooney
Jul 1, 1988·Biochimica Et Biophysica Acta·H G LileyP L Ballard
Feb 4, 1988·Biochimica Et Biophysica Acta·W R Rice, F M Singleton
Jun 3, 1991·Biochimica Et Biophysica Acta·Y OgasawaraT Akino
Jan 5, 1996·Biochimica Et Biophysica Acta·M J KreschH Lu
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Nov 22, 2002·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Lucy C SullivanChristopher B Daniels

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