Novel Dihydrocoumarins Induced by Radiolysis as Potent Tyrosinase Inhibitorsopen access
- Authors
- Jeong, Gyeong Han; Yadav, Manisha; Lee, Seung Sik; Chung, Byung Yeoup; Cho, Jae-Hyeon; Lee, In-Chul; Bai, Hyoung-Woo; Kim, Tae Hoon
- Issue Date
- Jan-2024
- Publisher
- Multidisciplinary Digital Publishing Institute (MDPI)
- Keywords
- 4-methylumbelliferone; gamma irradiation; hydrogenation; hydroxymethylation; tyrosinase inhibition
- Citation
- Molecules, v.29, no.2
- Indexed
- SCIE
SCOPUS
- Journal Title
- Molecules
- Volume
- 29
- Number
- 2
- URI
- https://scholarworks.gnu.ac.kr/handle/sw.gnu/69624
- DOI
- 10.3390/molecules29020341
- ISSN
- 1420-3049
1420-3049
- Abstract
- A representative naturally occurring coumarin, 4-methylumbelliferone (5), was exposed to 50 kGy of gamma ray, resulting in four newly generated dihydrocoumarin products 1–4 induced by the gamma irradiation. The structures of these new products were elucidated by interpretation of spectroscopic data (NMR, MS, [α]D, and UV). The unusual bisdihydrocoumarin 4 exhibited improved tyrosinase inhibitory capacity toward mushroom tyrosinase with IC50 values of 19.8 ± 0.5 μM as compared to the original 4-methylumbelliferone (5). A kinetic analysis also exhibited that the potent metabolite 4 had non-competitive modes of action. Linkage of the hydroxymethyl group in the C-3 and C-4 positions on the lactone ring probably enhances the tyrosinase inhibitory effect of 4-methylumbelliferone (5). Thus, the novel coumarin analog 4 is an interesting new class of tyrosinase inhibitory candidates that requires further examination. © 2024 by the authors.
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