A Biodegradable Microneedle Cuff for Comparison of Drug Effects through Perivascular Delivery to Balloon-Injured Arteries
AbstractRestenosis at a vascular anastomosis site is a major cause of graft failure and is difficult to prevent by conventional treatment. Perivascular drug delivery has advantages as drugs can be diffused to tunica media and subintima while minimizing the direct effect on endothelium. This in vivo study investigated the comparative effectiveness of paclitaxel, sirolimus, and sunitinib using a perivascular biodegradable microneedle cuff. A total of 31 New Zealand white rabbits were used. Rhodamine was used to visualize drug distribution (n = 3). Sirolimus- (n = 7), sunitinib- (n = 7), and paclitaxel-loaded (n = 7) microneedle cuffs were placed at balloon-injured abdominal aortae and compared to drug-free cuffs (n = 7). Basic histological structures were not affected by microneedle devices, and vascular wall thickness of the device-only group was similar to that of normal artery. Quantitative analysis revealed significantly decreased neointima formation in all drug-treated groups (p < 0.001). However, the tunica media layer of the paclitaxel-treated group was significantly thinner than that of other groups and also showed the highest apoptotic ratio (p < 0.001). Proliferating cell nuclear antigen (PCNA)-positive cells were significantly reduced in all drug-treated groups. Sirolimus or sunitinib appeared to be more appropriate for microneedle devices capable of slow drug release because vascular wall thickness was minimally affected. View Full-Text
Share & Cite This Article
Kim, D.-H.; Jang, E.H.; Lee, K.J.; Lee, J.Y.; Park, S.H.; Seo, I.H.; Lee, K.W.; Lee, S.H.; Ryu, W.; Youn, Y.-N. A Biodegradable Microneedle Cuff for Comparison of Drug Effects through Perivascular Delivery to Balloon-Injured Arteries. Polymers 2017, 9, 56.
Kim D-H, Jang EH, Lee KJ, Lee JY, Park SH, Seo IH, Lee KW, Lee SH, Ryu W, Youn Y-N. A Biodegradable Microneedle Cuff for Comparison of Drug Effects through Perivascular Delivery to Balloon-Injured Arteries. Polymers. 2017; 9(2):56.Chicago/Turabian Style
Kim, Dae-Hyun; Jang, Eui H.; Lee, Kang J.; Lee, Ji Y.; Park, Seung H.; Seo, Il H.; Lee, Kang W.; Lee, Seung H.; Ryu, WonHyoung; Youn, Young-Nam. 2017. "A Biodegradable Microneedle Cuff for Comparison of Drug Effects through Perivascular Delivery to Balloon-Injured Arteries." Polymers 9, no. 2: 56.
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.