Phorbol ester potentiation of canine pulmonary vasoreactivity to histamine

Scott A Barman, S. R. Ikeda

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The effect of phorbol myristate acetate (PMA) on canine pulmonary vasoreactivity to histamine was determined in the isolated blood-perfused dog lung. Pulmonary vascular resistances and compliances were measured by using vascular occlusion techniques. Histamine (10-5 M) significantly increased postcapillary resistance by venoconstriction and significantly attenuated total vascular compliance by decreasing large-vessel compliance and middle- compartment compliance. Pretreatment with the phorbol ester PMA (10-7 M) significantly potentiated the vasoactive response to histamine and elicited an edemagenic effect in the isolated dog lung through modulation of the histaminergic vasoconstrictor effect on precapillary resistance, postcapillary resistance, and pulmonary vascular compliance. Pretreatment with the protein kinase C inhibitors staurosporine (10-7 M) and calphostin C (10-6 M) and the dihydropyridine Ca2+ channel blocker nifedipine (10- 5 M) significantly attenuated the effect of PMA on histaminergic-mediated vasoconstriction. The results of this study indicate that phorbol esters may exert their effect on canine pulmonary vasoreactivity predominantly through activation of protein kinase C and influx of Ca2+ through voltage-dependent Ca2+ channels.

Original languageEnglish (US)
Pages (from-to)102-106
Number of pages5
JournalJournal of Applied Physiology
Volume79
Issue number1
DOIs
StatePublished - Jan 1 1995

Fingerprint

Phorbol Esters
Histamine
Compliance
Canidae
Tetradecanoylphorbol Acetate
Lung
Protein Kinase C
Blood Vessels
Histamine Agents
Dogs
Lung Compliance
Staurosporine
Protein C Inhibitor
Vasoconstrictor Agents
Nifedipine
Protein Kinase Inhibitors
Vasoconstriction
Vascular Resistance

Keywords

  • calphostin C
  • nifedipine
  • phorbol myristate acetate
  • protein kinase C
  • pulmonary vascular compliance
  • staurosporine
  • voltage-dependent calcium channels

ASJC Scopus subject areas

  • Physiology
  • Physiology (medical)

Cite this

Phorbol ester potentiation of canine pulmonary vasoreactivity to histamine. / Barman, Scott A; Ikeda, S. R.

In: Journal of Applied Physiology, Vol. 79, No. 1, 01.01.1995, p. 102-106.

Research output: Contribution to journalArticle

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