Application of the Tissue-Engineered Plant Scaffold as a Vascular Patch

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Vascular Surgery

Background:

• Tissue-engineered plant scaffolds show potential for in vitro applications.
• Natural materials offer biocompatible alternatives for medical devices.
• Vascular reconstruction often requires patch venoplasty to restore vessel patency.

Purpose of the Study:

• To evaluate decellularized plant scaffolds (leaf and onion cellulose) as vascular patches in a rat inferior vena cava model.
• To assess the efficacy of rapamycin nanoparticles in reducing neointimal hyperplasia in plant-based vascular scaffolds.

Main Methods:

• Decellularization of plant tissues (leaf and onion cellulose) to create scaffolds.
• Loading scaffolds with polylactic-co-glycolic acid (PLGA)-based rapamycin nanoparticles.
• Implantation of modified scaffolds in a rat inferior vena cava patch venoplasty model.
• Histological analysis to quantify neointimal thickness and cellular infiltration (CD68, PCNA).

Main Results:

• Nanoparticle-perfused leaf scaffolds demonstrated reduced neointimal thickness and fewer CD68-positive and PCNA-positive cells at 14 days post-implantation.
• Rapamycin nanoparticle-coated onion cellulose patches also exhibited decreased neointimal thickness.
• Plant-based scaffolds show promise but require strength enhancement for arterial applications.

Conclusions:

• Decellularized plant materials (leaf, onion cellulose) are viable natural scaffolds for tissue-engineered vascular patches.
• Rapamycin nanoparticle incorporation effectively mitigates neointimal hyperplasia.
• Further research is needed to improve scaffold mechanical properties for arterial implantation.