화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Macromolecular Research, Vol.23, No.11, 1034-1041, November, 2015
DOI10.1007/s13233-015-3139-5  Export Citation
Tacrolimus-eluting stent with biodegradable polymer is more effective than sirolimus- and everolimus-eluting stent in rabbit iliac artery restenosis model
Dae Sung Park1, 2, Jun-Kyu Park3, Myung Ho Jeong1, 2, †, In-Ho Bae1, 2, So-Youn Lee1, 2, Eun Jae Jang1, 2, Kyung-Seob Lim1, 2, Jong Min Kim1, 2, Jung Ha Kim1, 2, Dae Young Hyun1, 2, Yun Ah Jeong1, 2, Hyun Kuk Kim1, 2, and Doo Sun Sim1, 2
  • 1Korea Cardiovascular Stent Institute, Jangseong-gun, Jeonnam, 501-893, Korea
  • 2The Cardiovascular Convergence Research Center of Chonnam National University Hospital Designated by Ministry of Health and Welfare, Gwangju, 501-757, Korea
  • 3CGBio Co. Ltd., Jangseong-gun, Jeonnam, 501-893, Korea
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Drug-eluting stents, which are widely used in percutaneous coronary intervention, are fabricated with various considerations, such as drugs, design, polymers, and coating techniques. The aim of this study was to compare tacrolimus-eluting stents (TES), sirolimus-eluting stents (SES) and everolimus-eluting stents (EES) under identical conditions. Poly(lactic-co-glycolic acid) (PLGA) biodegradable polymer was used to coat bare metal stents (Chonnam National University Hospital Stent, CNUH Stent) with the drugs in all fabricating procedures with an ultrasonic stent-coating machine. Surface morphologies of the stents were investigated by scanning electron microscopy. The effect of drugs released from stents on rat smooth muscle and human umbilical vein endothelial cells was examined by MTT assay. The stents were implanted in rabbit iliac arteries randomly, with either TES (n=10), SES (n=10), or EES (n=10). After six weeks of implantation, the stents were isolated and subjected to histopathological analysis. Cell viability decreased in a dose-dependent manner. The surface morphologies of the stents showed a smooth and uniform shape. The release patterns of the stents showed similar profiles over 30 days. There were no significant differences in the injury score, internal elastic lamina, lumenal area, neointimal area, percent area stenosis, and inflammation score among the three groups. However, there was a significant difference in the fibrin score (0.6±0.44 in the TES, vs. 0.8±0.48 in the SES, vs. 0.8±0.61 in the EES, n=10, p<0.05). This study showed that tacrolimus was not inferior to sirolimus (SRL) and everolimus (EVL). Moreover, tacrolimus (TCL) is more effective in decreasing the fibrin score. Therefore, tacrolimus can be a useful alternative drug for fabricating drug-eluting stents.
Keywords:tacrolimus;sirolimus;everolimus;stent;restenosis
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