Age-related analysis of structural, biochemical and mechanical properties of the porcine mitral heart valve leaflets

Vladimir Kasyanov, Ricardo A. Moreno-Rodriguez, Martins Kalejs, Iveta Ozolanta, Peteris Stradins, Xuejun Wen, Hai Yao, Vladimir Mironov

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

The aim of this study was to assess structural and biochemical differences in the extracellular matrix of the fetal and adult porcine mitral heart valves in relation to their mechanical characteristics. Using tensile tests it was demonstrated that the material properties of porcine mitral heart valves progressively change with age. The collagen content of the adult heart valve, as estimated by hydroxyproline assay, increases three times as compared with fetal heart valves. Transmission electron microscopy demonstrated that the diameter of collagen fibrils increased in adult heart valves compared with fetal heart valves. The level of collagen cross-linking is lower in the fetal heart valve than the adult heart valve. The reported age differences in the material properties of fetal and adult porcine heart valves were associated with increases in collagen content, the diameter of collagen fibrils and the level of collagen cross-linking. These data lay a foundation for systematic elucidation of the structural determinants of material properties of heart valves during embryonic and postnatal valvulogenesis. They are also essential to define the desirable level of tissue maturation in heart valve tissue engineering.

Original languageEnglish
Pages (from-to)394-402
Number of pages9
JournalConnective Tissue Research
Volume54
Issue number6
DOIs
Publication statusPublished - 2013

Keywords

  • Biomechanics
  • Collagen
  • Heart valve
  • Porcine
  • Stress-strain

Field of Science

  • 2.5 Materials emgineering
  • 2.6 Medical engineering

Publication Type

  • 1.1. Scientific article indexed in Web of Science and/or Scopus database

Fingerprint

Dive into the research topics of 'Age-related analysis of structural, biochemical and mechanical properties of the porcine mitral heart valve leaflets'. Together they form a unique fingerprint.

Cite this