Arterial Wall Stiffening in Caveolin-1 Deficiency-Induced Pulmonary Artery Hypertension in Mice

J. Moreno, D. Escobedo, C. Calhoun, C. Jourdan Le Saux, H. C. Han

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Background: Pulmonary artery hypertension (PAH) is a complex disorder that can lead to right heart failure. The generation of caveolin-1 deficient mice (CAV-1−/−) has provided an alternative genetic model to study the mechanisms of pulmonary hypertension. However, the vascular adaptations in these mice have not been characterized. Objective: To determine the histological and functional changes in the pulmonary and carotid arteries in CAV-1−/− induced PAH. Methods: Pulmonary and carotid arteries of young (4–6 months old) and mature (9–12 months old) CAV-1−/− mice were tested and compared to normal wild type mice. Results: Artery stiffness increases in CAV-1−/− mice, especially the circumferential stiffness of the pulmonary arteries. Increases in stiffness were quantified by a decrease in circumferential stretch and transition strain, increases in elastic moduli, and an increase in total strain energy at physiologic strains. Changes in mechanical properties for the pulmonary artery correlated with increased collagen content while changes in the carotid artery correlated with decreased elastin content. Conclusions: We demonstrated that an increase in artery stiffness is associated with CAV-1 deficiency-induced pulmonary hypertension. These results improve our understanding of arterial remodeling in PAH.

Original languageEnglish (US)
Pages (from-to)217-228
Number of pages12
JournalExperimental Mechanics
Volume61
Issue number1
DOIs
StatePublished - Jan 2021

Keywords

  • Arteries
  • Caveolin-1 deficiency
  • Mechanical stiffness
  • Mice
  • Pulmonary hypertension

ASJC Scopus subject areas

  • Aerospace Engineering
  • Mechanics of Materials
  • Mechanical Engineering

Fingerprint

Dive into the research topics of 'Arterial Wall Stiffening in Caveolin-1 Deficiency-Induced Pulmonary Artery Hypertension in Mice'. Together they form a unique fingerprint.

Cite this