A Nanostructured Synthetic Collagen Mimic for Hemostasis

• Published in: Biomacromolecules Vol. 15; no. 4; pp. 1484 - 1490
• Main Authors: Kumar, Vivek A, Taylor, Nichole L, Jalan, Abhishek A, Hwang, Lyahn K, Wang, Benjamin K, Hartgerink, Jeffrey D
• Format: Journal Article
• Language: English
• Published: Washington, DC American Chemical Society 14.04.2014
• Subjects: amino acids; animals; Applied sciences; biocompatible materials; Biological and medical sciences; Biomimetics; blood coagulation; Blood. Blood coagulation. Reticuloendothelial system; collagen; Collagen - chemistry; Exact sciences and technology; extracellular matrix; Hemostasis; Hemostatics - chemistry; Hemostatics - pharmacology; Humans; hydrogels; inflammation; interleukin-1beta; Interleukin-1beta - metabolism; Medical sciences; Molecular Mimicry; monocytes; Monocytes - drug effects; nanofibers; Nanofibers - chemistry; Natural polymers; Pharmacology. Drug treatments; Physicochemistry of polymers; Platelet Activation; Platelet Adhesiveness; Proteins; secretion; thrombosis; Tissue Scaffolds; transfection; tumor necrosis factor-alpha; Tumor Necrosis Factor-alpha - metabolism; Blood coagulation; Hemostatic; Peptides; Clotting time; Activation; Experimental study; Recalcification time test; Biological activity; Platelet; Biomimetic compound; Collagen; Cell adhesion; Peptide synthesis
• ISSN: 1525-7797; 1526-4602; 1526-4602
• DOI: 10.1021/bm500091e

Collagen is a major component of the extracellular matrix and plays a wide variety of important roles in blood clotting, healing, and tissue remodeling. Natural, animal derived, collagen is used in many clinical applications but concerns exist with respect to its role in inflammation, batch-to-batch variability, and possible disease transfection. Therefore, development of synthetic nanomaterials that can mimic the nanostructure and properties of natural collagen has been a heavily pursued goal in biomaterials. Previously, we reported on the design and multihierarchial self-assembly of a 36 amino acid collagen mimetic peptide (KOD) that forms nanofibrous triple helices that entangle to form a hydrogel. In this report, we utilize this nanofiber forming collagen mimetic peptide as a synthetic biomimetic matrix useful in thrombosis. We demonstrate that nanofibrous KOD synthetic collagen matrices adhere platelets, activate them (indicated by soluble P-selectin secretion), and clot plasma and blood similar to animal derived collagen and control surfaces. In addition to the thrombotic potential, THP-1 monocytes incubated with our KOD collagen mimetic showed minimal proinflammatory cytokine (TNF-α or IL-1β) production. Together, the data presented demonstrates the potential of a novel synthetic collagen mimetic as a hemostat.