Biosafety of a novel covered self-expandable metal stent coated with poly(2-methoxyethyl acrylate) in vivo

Tetsuya Ishizawa, Naohiko Makino, Yasuharu Kakizaki, Akiko Matsuda, Yoshihide Toyokawa, Shun Ooyama, Masaru Tanaka, Yoshiyuki Ueno

研究成果: Contribution to journalArticle査読

抄録

Covered self-expandable metal stents (CSEMS) are often used for palliative endoscopic biliary drainage; however, the unobstructed period is limited because of sludge occlusion. The present study aimed to evaluate the biosafety of a novel poly(2-methoxyethyl acrylate)- coated CSEMS (PMEA-CSEMS) for sludge resistance and examine its biosafety in vivo. Using endoscopic retrograde cholangiopancreatography, we placed the PMEA-CSEMS into six normal porcine bile ducts and conventional CSEMS into three normal porcine bile ducts. We performed serological examination and undecalcified histological analysis at 1, 3, and 6 months during follow-up. In the bile ducts with PMEA-CSEMS or conventional CSEMS, we observed no increase in liver enzyme or inflammatory marker levels in the serological investigations and mild fibrosis but no inflammatory response in the histopathological analyses. Thus, we demonstrated the biosafety of PMEA-CSEMS in vivo.

本文言語英語
論文番号e0257828
ジャーナルPloS one
16
9 September
DOI
出版ステータス出版済み - 9 2021

All Science Journal Classification (ASJC) codes

  • 一般

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