Radial artery as an autologous cell source for valvular tissue engineering efforts

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Cardiovascular Research

Background:

• Developing viable tissue-engineered aortic valves requires identifying suitable autologous cell sources and biocompatible scaffolds.
• The radial artery (RA) is explored as a potential cell source, and small intestinal submucosa (SIS) as a scaffold for tissue engineering.

Purpose of the Study:

• To evaluate the radial artery as a cell source for tissue-engineered aortic valves.
• To determine optimal culture conditions for radial artery cells on SIS scaffolds.
• To assess the suitability of SIS as a scaffold for tissue-engineered aortic valve generation.

Main Methods:

• Porcine radial artery cells were cultured on 2D dishes and 3D SIS scaffolds, forming cell-scaffold composites (CSCs).
• Cultures were maintained in Medium 199 (M199) or endothelial growth media (EGM) to identify optimal growth conditions.
• Cellular phenotype, matrix metalloproteinase (MMP) profiles, and cellular invasion into the scaffold were analyzed.

Main Results:

• Radial artery cells exhibited phenotypes consistent with normal aortic valve cells.
• Endothelial growth media (EGM) significantly promoted radial artery cell invasion and remodeling of the SIS scaffold compared to M199.
• This enhanced remodeling is critical for replacing the scaffold before implantation.

Conclusions:

• The radial artery is a suitable autologous cell source for generating tissue-engineered aortic valves.
• Endothelial growth media (EGM) optimizes the interaction between radial artery cells and SIS scaffolds.
• This study presents the first evidence supporting the radial artery for tissue-engineered valve development.