Late-outgrowth endothelial progenitors from patients with coronary artery disease: endothelialization of confluent...

Area of Science:

• Biomedical Engineering
• Regenerative Medicine
• Cardiovascular Research

Background:

• Coronary artery disease (CAD) necessitates small-diameter tissue-engineered blood vessels (TEBVs).
• Endothelial progenitor cells (EPCs) from peripheral blood of CAD patients offer a minimally invasive autologous source for TEBV endothelialization.
• Previous studies confirmed CAD EPCs' proliferative capacity and endothelial markers, but their interaction with TEBV stromal cells was unevaluated.

Purpose of the Study:

• To evaluate the behavior of primary human CAD EPCs when co-cultured with human smooth muscle cells (SMCs), the primary component of TEBV media.
• To compare the performance of CAD EPCs with human aortic endothelial cells (HAECs) in a direct co-culture model.
• To assess the potential of CAD EPCs for TEBV endothelialization.

Main Methods:

• Direct co-culture of primary CAD EPCs or HAECs onto confluent, quiescent human SMC layers.
• Assessment of EPC/HAEC coverage, adhesion strength, alignment under flow, and flow-induced nitric oxide generation.
• Evaluation of the integrin-binding profile of CAD EPCs on SMC layers.

Main Results:

• CAD EPCs demonstrated comparable or superior performance to HAECs in terms of coverage, adhesion, and alignment.
• CAD EPCs exhibited significant flow-induced nitric oxide production.
• Both CAD EPCs and cord blood EPCs proved viable for TEBV endothelialization, with CAD EPCs showing promising functional characteristics.

Conclusions:

• Human CAD EPCs are a viable and effective cell source for the endothelialization of tissue-engineered blood vessels.
• CAD EPCs exhibit robust functional properties when interacting with smooth muscle cells, supporting their use in TEBV development.
• These findings support the use of autologous peripheral blood EPCs for TEBV applications in CAD patients.