TY - JOUR
T1 - Characterization of a sandwich plga-gallic acid-plga coating on mg alloy zk60 for bioresorbable coronary artery stents
AU - Lin, Li Han
AU - Lee, Hung Pang
AU - Yeh, Ming Long
N1 - Funding Information:
This research was financially supported by Ministry of Science and Technology in Taiwan through Grants MOST-106-3114-E-006-012 and Medical Device Innovation Center (MDIC), National Cheng Kung University (NCKU) from the Featured Areas Research Center Program within the framework of the Higher Education Sprout Project by the Ministry of Education (MoE) in Taiwan.
Funding Information:
Materials Funding:2020, 13This, x FOR researPEER REVIEWch was financially supported by Ministry of Science and Technology in Taiwan through Grants13 of 15 MMOatSerTi-a1ls0 260-2301,1 143-, Ex- F0O06R- 0P1E2ERa nRdEVMIEeWdical Device Innovation Center (MDIC), National Cheng Kung Univ1e3r soifty15 (NCKU) from the Featured Areas Research Center Program within the framework of the Higher Education Sprout
Funding Information:
Acknowledgments: This research was supported bythe Nano Biomedical andTissue Engineering LAB, Acknowledgments: This research was supported by the Nano Biomedical and Tissue Engineering LAB, Department of BME, National ChengKungUniversity. We thank INTAI Technology and CHONG HUAI Laser ADcekpnaorwtmleedngt mofe BnMts:E, TNhaistiornesael aCrhchenwg aKsunsugpUpnoirvteerdsibtyy. Wthee thNaannko INBTioAmI eTdeicchanl oalnodgyT ainssdu Ce HEOngNinGe HerUinAgI LLAasBe,r for providingDepartmentthe Laserof BME,techniNationalque of MgCheng-stenKungts.University. We thank INTAI Technology and CHONG HUAI Laser for providing the Laser technique of Mg-stents. Conflicts of Interest: The authors declare no conflict of interest. The funders had no role in the design of the studys;tiund tyh;einc othleleccotliloenc,t iaonna, laynsaelyss, eosr, oinrt ienrtperreptreattaitoino no fo fd daattaa;; in the writing of tfhteh em manaunsucsrcirpitp, to, ro irn i nth e tdheec idseiocni stioo n to study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, or in the decision to publipublishsphu tbhleis rhethe stheur esults.lrtess.ults.
Publisher Copyright:
© 2020 by the authors. Licensee MDPI, Basel, Switzerland.
PY - 2020/12
Y1 - 2020/12
N2 - Absorbable magnesium stents have become alternatives for treating restenosis owing to their better mechanical properties than those of bioabsorbable polymer stents. However, without modification, magnesium alloys cannot provide the proper degradation rate required to match the vascular reform speed. Gallic acid is a phenolic acid with attractive biological functions, including anti-inflammation, promotion of endothelial cell proliferation, and inhibition of smooth muscle cell growth. Thus, in the present work, a small-molecule eluting coating is designed using a sandwich-like configuration with a gallic acid layer enclosed between poly (d,l-lactide-co-glycolide) layers. This coating was deposited on ZK60 substrate, a magnesium alloy that is used to fabricate bioresorbable coronary artery stents. Electrochemical analysis showed that the corrosion rate of the specimen was ~2000 times lower than that of the bare counterpart. The released gallic acid molecules from sandwich coating inhibit oxidation by capturing free radicals, selectively promote the proliferation of endothelial cells, and inhibit smooth muscle cell growth. In a cell migration assay, sandwich coating delayed wound closure in smooth muscle cells. The sandwich coating not only improved the corrosion resistance but also promoted endothelialization, and it thus has great potential for the development of functional vascular stents that prevent late-stent restenosis.
AB - Absorbable magnesium stents have become alternatives for treating restenosis owing to their better mechanical properties than those of bioabsorbable polymer stents. However, without modification, magnesium alloys cannot provide the proper degradation rate required to match the vascular reform speed. Gallic acid is a phenolic acid with attractive biological functions, including anti-inflammation, promotion of endothelial cell proliferation, and inhibition of smooth muscle cell growth. Thus, in the present work, a small-molecule eluting coating is designed using a sandwich-like configuration with a gallic acid layer enclosed between poly (d,l-lactide-co-glycolide) layers. This coating was deposited on ZK60 substrate, a magnesium alloy that is used to fabricate bioresorbable coronary artery stents. Electrochemical analysis showed that the corrosion rate of the specimen was ~2000 times lower than that of the bare counterpart. The released gallic acid molecules from sandwich coating inhibit oxidation by capturing free radicals, selectively promote the proliferation of endothelial cells, and inhibit smooth muscle cell growth. In a cell migration assay, sandwich coating delayed wound closure in smooth muscle cells. The sandwich coating not only improved the corrosion resistance but also promoted endothelialization, and it thus has great potential for the development of functional vascular stents that prevent late-stent restenosis.
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U2 - 10.3390/ma13235538
DO - 10.3390/ma13235538
M3 - Article
AN - SCOPUS:85097345077
SN - 1996-1944
VL - 13
SP - 1
EP - 16
JO - Materials
JF - Materials
IS - 23
M1 - 5538
ER -