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Item details URL: http://open-repository.kisti.re.kr/cube/handle/open_repository/473474.do

Title: A Biodegradable Microneedle Cuff for Comparison of Drug Effects throughPerivascular Delivery to Balloon-Injured Arteries

Description: The authors would like to thank Dong-Su Jang, MFA, ( MedicalIllustrator, Medical Research Support Section, Yonsei University Collegeof Medicine, Seoul, Korea) for his help with the illustrations. Thisstudy was supported by a faculty research grant of Yonsei UniversityCollege of Medicine (6-2014-0116). This research was also financiallysupported by research grants of the National Research Foundation ofKorea (NRF) funded by the Korean Government (MSIP)(NRF-2016R1A2B4010487) and the Korea Health Technology R&D Projectthrough the Korea Health Industry Development Institute (KHIDI), fundedby the Ministry of Health & Welfare, Republic of Korea (HI08C2149)

abstract: Restenosis 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.

provenance: Made available in Cube on 2018-09-28T10:20:34Z (GMT). No. of bitstreams: 0

author: Kim, Dae-Hyun; Jang, Eui Hwa; Lee, Kang Ju; Lee, Ji Yong; Park, Seung Hyun; Seo, Il Ho; Lee, Kang Woog; Lee, Seung Hyun; Ryu, Won Hyoung; Youn, Young-Nam

uri: http://open-repository.kisti.re.kr/cube/handle/open_repository/473474.do

Project Name: Development of Nanostructured Drug Delivery Systems for Vascular Diseases

subject: anastomosis; drug delivery; microneedle; restenosis; peripheral vasculardisease

A Biodegradable Microneedle Cuff for Comparison of Drug Effects throughPerivascular Delivery to Balloon-Injured Arteries