期刊
ACS APPLIED MATERIALS & INTERFACES
卷 9, 期 36, 页码 30343-30358出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b07444
关键词
multifunctional coating; hyaluronic acid; molecular weight; biocompatibility; cardiovascular biomaterials
资金
- National Natural Science Foundation of China [31570963, 81401522]
- National Natural Science Foundation of China and Henan Province [U1504310]
- China Postdoctoral Science Foundation [2014M562333, 2015M582206]
- National Center for International Research of Micro-nano Molding Technology & Key Laboratory for Micro Molding Technology of Henan Province [MMT201701]
The molecular weights (MWs) of hyaluronic acid (HA) in extracellular matrix secreted from both vascular endothelial cells (VECs) and vascular smooth muscle, cells (VSMCs) play crucial roles in the cardiovascular physiology, as HA with appropriate MW influences important pathways of cardiovascular homeostasis, inhibits VSMC synthetic phenotype change and proliferation, inhibits platelet activation and aggregation, promotes endothelial monolayer repair and functionalization, and prevents inflammation and atherosclerosis. In this study, HA samples with gradients of MW (4 x 10(3), 1 x 10(5), and 5 x 10(5) Da) were prepared by covalent conjugation to a copolymerized film of polydopamine and hexamethylendiamine (PDA/HD) as multifunctional coatings (PDA/HD-HA) with potential to improve the biocompatibility of cardiovascular biomaterials. The coatings immobilized with high-MW-HA (PDA/HD-HA-2: 1 x 10(5) Da; PDA/HD-HA-3: 5 x 10(5) Da) exhibited a remarkable suppression of platelet activation/aggregation and thrombosis under 15 dyn/cm(2) blood flow and simultaneously suppressed the adhesion and proliferation of VSMC and the adhesion, activation, and inflammatory cytokine release of macrophages. In particular, PDA/HD-HA-2 significantly, enhanced VEC adhesion, proliferation, migration, and functional factors release, as well as the captured number of endothelial progenitor cells under dynamic condition. The in vivo results indicated that the multifunctional surface (PDA/HD-HA-2) created a favorable microenvironment of endothelial monolayer formation and functionalization for promoting reendothelialization and reducing restenosis of cardiovascular biomaterials.
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