Sung Hoon Kim*, **,#, Gu Won Jeong*, **,#, and Young-Min Kim*, **,†
*Center for Biomaterials, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea
**Division of Biomedical Science and Technology, KIST School, Korea University of Science and Technology, Seoul 02792, Korea
*한국과학기술연구원 생체재료연구센터, **과학기술연합대학원 대학교 의공학과
Reproduction, stored in a retrieval system, or transmitted in any form of any part of this publication is permitted only by written permission from the Polymer Society of Korea.
Injectable tissue adhesives using catechol have been raised as problems such as reduced effectiveness, dispersion into surrounding tissues and toxicity due to catechol groups. To overcome these problems, we designed that a thermo-sensitive and adhesive hydrogel with special characteristics, 1) rapid gelation to reduce the dispersion of the adhesive within body, 2) temperature-dependent hydrogel network formation to improve the adhesive effect by increased the number of cohesive networks and tissue-adhesive catechol moieties due to replacement of cohesive networks between catechol moieties, and 3) reduction the toxicity by catechol group. Here, the adhesive hydrogel system was developed by mixing the synthesized polymers. The structure of the polymer complex was analyzed using 1H nuclear magnetic resonance spectroscopy and Fourier transform infrared spectroscopy. In addition, the sol-gel transition and biocompatibility of the polymer were confirmed. Finally, it was confirmed that the potential of tissue adhesive through the adhesion test on various materials.
카테콜을 이용한 주입형 조직접착제는 주변조직으로의 분산으로 인한 접착효과 저하와 카테콜기로 인한 독성으로 문제가 제기되어 왔다. 이러한 문제점을 극복하기 위해 온도 감응성 네트워크 형성으로 인한 접착 하이드로젤의 빠른 젤화로 1) 온몸에 분산되는 것을 줄이고, 2) 카테콜 간 코헤시브 결합으로 인해 생기는 네트워크를 대체함으로 코헤시브 네트워크와 조직 접착 카테콜 형태의 수를 증가시켜 접착능력을 향상시키고, 3) 접착을 위해 상대적으로 필요한 카테콜 기의 수를 줄이며 생체 적합한 고분자를 이용함으로 생체 적합하면서도 접착능력이 있는 온도 감응성 접착 하이드로젤 시스템을 개발하고자 하였다. 합성된 고분자는 1H nuclear magnetic resonance spectroscopy와 Fourier transform infrared spectroscopy를 통해 구조를 분석하였다. 또한, 특정 온도에서 온도 감응성 하이드로젤의 솔-젤 전이 현상과 폴리머의 독성 및 생체 적합성을 확인하였다. 최종적으로 여러 재질에 접착테스트를 통해 접착 가능성 및 접착 강도의 확인을 통해 조직 접착제에 대한 가능성을 확인하였다.
Keywords: poly(organophosphazene), thermosensitive hydrogels, tissue adhesive, catechol.
2023; 47(2): 241-248
Published online Mar 25, 2023
*Center for Biomaterials, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea
**Division of Biomedical Science and Technology, KIST School, Korea University of Science and Technology, Seoul 02792, Korea