Polymer(Korea), Vol.46, No.2, 216-222, March, 2022
창상 치유를 위한 생체고분자 기반 광가교형 조직접착제 개발
In Situ Photo-crosslinkable Biodegradable Tissue Adhesive for Wound Healing
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초록
조직접착제는 조직의 결합 및 상처 봉합의 목적으로 다양한 의료 분야에서 사용되고 있다. 기존의 액상 조직 접착제는 생체적합성이 낮거나 우수한 접착력을 달성하기 위해 반응 시간이 오래 걸린다는 단점이 있다. 본 연구에 서는 생분해성을 가진 히알루론산(hyaluronic acid, HA)에 광가교성 메타크릴레이트(methacrylate, MA) 그룹을 도입 하여, 빛에 의해 빠르게 경화되어 상처 부위를 즉각적으로 봉합할 수 있는 광가교형 조직접착제를 개발하였다. 광경 화형 조직접착제는 5초 이내의 짧은 UV 조사 후 조직에 높은 접착력을 보이면서 안정적인 하이드로젤 층을 형성하 였다. MA의 치환도 및 고분자의 농도를 변화시켜, 접착제의 기계적 물성과 조직접착력도 손쉽게 조절할 수 있었다. 창상 동물모델 실험에서 HA 기반 조직접착제는 기존 상용 접착제에 비해 우수한 조직접착력 및 빠른 상처 회복을 보였다. HA의 높은 생체적합성과 생분해성을 고려할 때, HA 기반 광가교형 조직접착제는 다양한 연조직의 상처 치료에 활용도가 높을 것으로 예상된다.
Tissue adhesives are widely used in various medical fields for tissue bonding and wound closure. Existing glue-type tissue adhesives have disadvantages such as low biocompatibility or a long reaction time to achieve firm tissue adhesion. Herein we developed photocurable tissue adhesives by introducing photocrosslinkable methacrylate (MA) groups into biodegradable hyaluronic acid (HA) that enables strong tissue adhesion and wound sealing. The photocurable tissue adhesive formed a stable hydrogel layer with good tissue adhesion following short UV exposure (<5 s). By controlling the substitution rate of MA and polymer concentration, the mechanical properties and adhesion strength of the tissue adhesive could be easily manipulated. From the incisional wound animal model, the HA-based tissue adhesive used in this study showed better tissue adhesion and faster wound healing efficacy compared to commercial glues. Considering the high biocompatibility and biodegradability of HA, this photocurable adhesive would be useful in wound healing of various soft tissues.
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