Estrogen release from metallic stent surface for the prevention of restenosis

被引:9
作者
Joung, YK
Kim, HI
Kim, SS
Chung, KH
Jang, YS
Park, KD
机构
[1] Ajou Univ, Dept Mol Sci & Technol, Suwon 442749, South Korea
[2] Kyunghee Univ, Div Environm & Chem Engn, Suwon 449701, South Korea
[3] Yonsei Univ, Coll Med, Cardiovasc Res Ctr, Seoul 120752, South Korea
关键词
restenosis; estrogen-releasing stent; estrogen immobilization; in vitro release; metallic stent;
D O I
10.1016/S0168-3659(03)00305-5
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
For the prevention of coronary restenosis, estrogen was coupled onto a metallic stent and in vitro release of estrogen was investigated. Estrogen was introduced to the metal surface using a hydrolysable covalent bond for local sustained delivery of drug as follows: (i) the stainless steel (SS) surface was activated with silane by plasma polymerization, (ii) the activated surface (SS-Si surface) was treated with acrylic acid by plasma polymerization (SS-Si-AAc surface), and (iii) 17beta-estradiol (E-2) was covalently linked to the carboxyl group on that surface (SS-Si-AAc-E-2 surface). The modified surfaces were characterized by X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FT-IR) spectroscopy, and water contact angle measurement. The amount of E-2 was measured by UV-visible spectrophotometry and high performance liquid chromatography (HPLC). The in vitro release profile of E-2 demonstrated sustained release of E-2 in aqueous buffer. In summary, a novel method of immobilizing estrogen onto a metallic stent surface using plasma polymerization has been developed. The obtained results attest to the usefulness of the estrogen-releasing stent for preventing restenosis. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码:83 / 91
页数:9
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