인문학
사회과학
자연과학
공학
의약학
농수해양학
예술체육학
복합학
지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록·키워드
Emodin, a natural anthraquinone possessing anticancer, anti-inflammatory, antioxidant, and antiviral activities, has recently garnered interest as a photosensitizer for photodynamic therapy (PDT). In this study, we investigated its solvent-dependent photochemical reactivity under UV–visible irradiation (320–800 nm) to access structurally diverse derivatives. Photoirradiation in methanol afforded physcion (1), a C-6 methoxylated analogue formed via phenoxyl radical-mediated O-methylation, whereas prolonged irradiation in ethanol yielded (–)-biemodin (2), a symmetric C-7–linked dimer. Structures were elucidated by 1H-NMR, HR-ESI-MS, and electronic circular dichroism (ECD) spectroscopy analysis. Biological activities were assessed in three assays including cytotoxicity, DPPH radical scavenging, and indoleamine 2,3-dioxygenase (IDO) inhibition. Notably, only emodin itself showed moderate cytotoxicity at 50 µM; neither physcion (1) nor (–)-biemodin (2) displayed significant activity in any assay. These findings illustrate that photochemical modification of emodin enhances structural diversity but does not necessarily improve biological efficacy. Moreover, the pronounced photoreactivity of emodin highlights the importance of light-protected storage to prevent unintended degradation or structural alteration.
본문·목차
인공지능 문자 인식 모델을 통해 추출된 텍스트로, 일부 오타나 오류가 포함될 수 있으나 지속적으로 개선 중입니다.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.
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UCI(KEPA) : I410-151-26-02-094380939