The Korean Journal of Vision Science (대한시과학회지)

The Korean Society of Vision Science (대한시과학회)
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Antioxidant Activity of Dopamine-Modified Hydrogels Containing Cross-linked Hyaluronic Acid

도파민이 적용된 히알루론산 가교 하이드로겔의 항산화 활성

  • Received : 2018.11.27
  • Accepted : 2018.12.17
  • Published : 2018.12.31
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Abstract

Purpose : : In this study, we made dopamine-functionalized hydrogels containing a cross-linked hyaluronic acid (HA) network and investigated their antioxidant activities. Methods : In the first step, we made poly hydroxyethyl methacrylate(p(HEMA))-based hydrogels post-modified with an interpenetrating polymer network(IPN) structure composed of HA polymers and a p(HEMA) network. The subsequent functionalization with dopamine via an amide coupling reaction resulted in the antioxidant hydrogels. Their antioxidant activities were evaluated using 2,2'-azino-bis-(3-ethylbenzothiazoline-6-sulfonic acid) and 2,2-diphenyl-1-picrylhydrazyl radical scavenging assays. Results : The dopamine-modified hydrogels exhibited significant antioxidant activities, when compared to unmodified control. The presence of the HA-IPN structure improved the surface wettability of the hydrogel while dopamine-conjugated IPN hydrogel did not demonstrate the significant difference compared to hydrogel control. Dopamine-modified hydrogels exhibited high transmittance (>88%). Conclusion : The results demonstrate that the development of antioxidant hydrogels based on dopamine-conjugated HA-IPN structures may help develop ophthalmic and biomedical materials.

목적 : 이 연구에서는 도파민이 적용된 히알루론산 가교 하이드로겔을 제조하고 항산화 활성을 조사하였다. 방법 : 먼저 히알루론산과 p(HEMA)로 구성된 상호침투고분자구조로 후처리 한 p(HEMA) 기반 하이드로겔을 제조하였다. 다음으로 아마이드 결합반응을 통해 도파민이 적용된 항산화 하이드로겔을 제조하였다. 항산화 활성의 평가는 ABTS 와 DDPH 라디칼 소거능 방법을 사용하였다. 결과 : 도파민이 적용된 하이드로겔은 유의한 항산화 활성을 나타내었다. 히알루론산의 가교는 하이드로겔 표면의 습윤성을 개선시킨 반면에 도파민이 적용된 하이드로겔은 대조군과 비교하여 유의한 차이를 나타내지 못했다. 도파민이 적용된 하이드로겔은 높은 광투율을 나타내었다. (>88%) 결론 : 도파민이 결합된 히알루론산의 가교에 기초한 항산화 하이드로겔의 개발이 안의료 및 생물의학 재질 개발에 도움을 줄 수 있을 것으로 사료된다.

Keywords

Acknowledgement

Supported by : Dongshin University

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