α ₂ (VIII) Collagen Substrata Enhance Endothelial Cell Retention Under Acute Shear Stress Flow via an α ₂ β ₁ Integrin–Dependent Mechanism
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Key Points
The aim is to investigate how alpha2(VIII) collagen influences endothelial cell attachment and retention under shear stress.
In vitro assessment of endothelial cell attachment to alpha2(VIII) collagen under static and dynamic conditions.
Flow conditions tested up to 100 dyne/cm² with comparisons to fibronectin and glass substrata.
In vivo studies using endothelialized polyurethane grafts implanted in caprine carotid artery.
Endothelial cell attachment to alpha2(VIII) collagen was 18-fold higher compared to fibronectin.
Under flow, retention rates on alpha2(VIII) collagen were significantly higher (53% and 51%) than on fibronectin (23% and 16%) and glass (7% and 1%).
In vivo studies showed significantly higher retention on alpha2(VIII) collagen-coated grafts compared to fibronectin-coated grafts after 24 hours (P < 0.05).
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Implication
Randomized trial assesses endothelial cell attachment to alpha2(VIII) collagen, indicating increased retention and graft performance.