Regulation of pulmonary vasoconstriction by agonists and caveolae

Christian Schach, Amy L. Firth, Minlin Xu, Carmelle V. Remillard, Hemal H. Patel, Paul A. Insel, Jason Yuan

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Sustained pulmonary vasoconstriction contributes to the elevated pulmonary vascular resistance observed in pulmonary arterial hypertension. A rise in cytosolic Ca2 + in pulmonary artery smooth muscle cells (PASMCs) is major trigger for pulmonary vasoconstriction. One family of drugs currently being pursued as a potential treatment for pulmonary hypertension are the statins, which act by depleting cholesterol and reducing the number of caveolae. This study aimed at investigating the role of caveolae, membrane receptors, and ion channels (that are potentially located in the caveolae) in agonist-mediated pulmonary vasoconstriction in order to gain a greater understanding of the signaling mechanisms involved in the regulation of pulmonary vascular tone. Chronic treatment of PASMCs with the cholesterol-depleting agent, methyl-β-cyclodextrin (Mβ CD), significantly reduced the number of cholesterol rich caveolae regions in the membrane. This disruption of cholesterol in caveolae significantly inhibited pharmacomechanical (induced by phenylephrine), but not electromechanical (induced by elevated extracellular potassium concentration), rat pulmonary artery contraction. These results indicate that receptors may functionally colocalize in caveolae in PASMCs and coordinate to regulate pulmonary vascular tone.

Original languageEnglish (US)
Pages (from-to)195-208
Number of pages14
JournalExperimental Lung Research
Volume34
Issue number4
DOIs
StatePublished - May 2008
Externally publishedYes

Fingerprint

Caveolae
Vasoconstriction
Cholesterol
Muscle
Lung
Pulmonary Artery
Smooth Muscle Myocytes
Cells
Membranes
Ion Channels
Pulmonary Hypertension
Hydroxymethylglutaryl-CoA Reductase Inhibitors
Blood Vessels
Cyclodextrins
Phenylephrine
Rats
Potassium
Vascular Resistance
Pharmaceutical Preparations

Keywords

  • Caveolae
  • Pulmonary artery
  • Store depletion
  • Vasoconstriction

ASJC Scopus subject areas

  • Pulmonary and Respiratory Medicine

Cite this

Schach, C., Firth, A. L., Xu, M., Remillard, C. V., Patel, H. H., Insel, P. A., & Yuan, J. (2008). Regulation of pulmonary vasoconstriction by agonists and caveolae. Experimental Lung Research, 34(4), 195-208. https://doi.org/10.1080/01902140801925471

Regulation of pulmonary vasoconstriction by agonists and caveolae. / Schach, Christian; Firth, Amy L.; Xu, Minlin; Remillard, Carmelle V.; Patel, Hemal H.; Insel, Paul A.; Yuan, Jason.

In: Experimental Lung Research, Vol. 34, No. 4, 05.2008, p. 195-208.

Research output: Contribution to journalArticle

Schach, C, Firth, AL, Xu, M, Remillard, CV, Patel, HH, Insel, PA & Yuan, J 2008, 'Regulation of pulmonary vasoconstriction by agonists and caveolae', Experimental Lung Research, vol. 34, no. 4, pp. 195-208. https://doi.org/10.1080/01902140801925471
Schach C, Firth AL, Xu M, Remillard CV, Patel HH, Insel PA et al. Regulation of pulmonary vasoconstriction by agonists and caveolae. Experimental Lung Research. 2008 May;34(4):195-208. https://doi.org/10.1080/01902140801925471
Schach, Christian ; Firth, Amy L. ; Xu, Minlin ; Remillard, Carmelle V. ; Patel, Hemal H. ; Insel, Paul A. ; Yuan, Jason. / Regulation of pulmonary vasoconstriction by agonists and caveolae. In: Experimental Lung Research. 2008 ; Vol. 34, No. 4. pp. 195-208.
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