Optimal conjugation of catechol group onto hyaluronic acid in coronary stent substrate coating for the prevention of restenosis

Eugene Lih, Seul Gi Choi, Dong June Ahn, Yoon Ki Joung, Dong Keun Han

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Although endovascular stenting has been used as an interventional therapy to treat cardio- and cerebro-vascular diseases, it is associated with recurrent vascular diseases following stent thrombosis and in-stent restenosis. In this study, a metallic stent was coated with dopamine-conjugated hyaluronic acid with different ratios of catechol group to improve hemocompatibility and re-endothelialization. Especially, we were interested in how much amount of catechol group is appropriate for the above-mentioned purposes. Therefore, a series of dopamine-conjugated hyaluronic acid conjugates with different ratios of catechol group were synthesized via a carbodiimide coupling reaction. Dopamine-conjugated hyaluronic acid conjugates were characterized with 1H-nuclear magnetic resonance and Fourier transform infrared spectroscopy, and the amount of catechol group in dopamine-conjugated hyaluronic acid was measured by ultraviolet spectrometer. Co-Cr substrates were polished and coated with various dopamine-conjugated hyaluronic acid conjugates under pH 8.5. Dopamine-conjugated hyaluronic acid amounts on the substrate were quantified by micro-bicinchoninic acid assay. Surface characteristics of dopamine-conjugated hyaluronic-acid-coated Co-Cr were evaluated by water contact angle, scanning electron microscopy, and atomic force microscopy. The hemocompatibility of the surface-modified substrates was assessed by protein adsorption and platelet adhesion tests. Adhesion and activation of platelets were confirmed with scanning electron microscopy and lactate dehydrogenase assay. Human umbilical vein endothelial cells were cultured on the substrates, and the viability, adhesion, and proliferation were investigated through cell counting kit-8 assay and fluorescent images. Obtained results demonstrated that optimal amounts of catechol group (100 µmol) in the dopamine-conjugated hyaluronic acid existed in terms of various properties such as hemocompatibility and cellular responses.

Original languageEnglish
JournalJournal of Tissue Engineering
Volume7
DOIs
Publication statusPublished - 2016 Feb 13

Fingerprint

Hyaluronic acid
Stents
Hyaluronic Acid
Dopamine
Coatings
Substrates
Assays
Adhesion
Platelets
Vascular Diseases
Electron Scanning Microscopy
Ultraviolet spectrometers
Carbodiimides
Scanning electron microscopy
catechol
Atomic Force Microscopy
Endothelial cells
Human Umbilical Vein Endothelial Cells
Platelet Activation
Fourier Transform Infrared Spectroscopy

Keywords

  • dopamine
  • hyaluronic acid
  • restenosis
  • thrombosis
  • Vascular stent

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Biomaterials
  • Biomedical Engineering

Cite this

Optimal conjugation of catechol group onto hyaluronic acid in coronary stent substrate coating for the prevention of restenosis. / Lih, Eugene; Choi, Seul Gi; Ahn, Dong June; Joung, Yoon Ki; Han, Dong Keun.

In: Journal of Tissue Engineering, Vol. 7, 13.02.2016.

Research output: Contribution to journalArticle

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