Yao Yao
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Research Subjects
Yao Yao has a total of 2 co-authors. Here are the top co-authors by number of shared publications:
- Hai-Zhou Li
Center for Pharmaceutical Sciences, Faculty of Life Science and Technology, Kunming University of Science and Technology, Chenggong Campus, Kunming 650500, People's Republic of China
1 shared publication - Hong-Bo Deng
Faculty of Life Science and Technology, Kunming University of Science and Technology, 727 Jingming South Road, Chenggong District, Kunming 650500, China
1 shared publication
Latest Publications
- Open Access
Chemical Profiling and Tyrosinase Inhibition Mechanism of Phenylethanoid Glycosides from Corallodiscus flabellatus
Alpine plants face intense ultraviolet (UV) radiation in high-altitude ecosystems, necessitating adaptive mechanisms like tyrosinase-mediated phenolic metabolism for UV protection. This study aimed to characterize the phenolic profile of Corallodiscus flabellatus (or C. flabellata) and elucidate its mechanistic interactions with tyrosinase under high-altitude environments with intense ultraviolet (UV) radiation. Two novel phenylethanoid glycosides (PhGs) and seven known compounds were isolated using silica gel, ODS, and preparative HPLC, with structures determined via NMR, HR-ESI-MS, and acid hydrolysis. Tyrosinase (EC 1.14.18.1) inhibition assays revealed divergent effects: compound 7 (containing a caffeoyl moiety) exhibited potent inhibition (IC50 = 0.23 μM), comparable to arbutin, while other PhGs displayed activation or biphasic responses. Molecular docking analysis demonstrated that compound 7 stabilized tyrosinase via π-π stacking with Phe264 and Cu2+ coordination, whereas activating compounds likely acted as substrates. These findings elucidate the dual regulatory function of PhGs, which activate tyrosinase to counteract acute ultraviolet-induced stress and inhibit its activity to attenuate oxidative overload, thereby advancing our understanding of alpine plant adaptation mechanisms.
Open AccessChemical Profiling and Tyrosinase Inhibition Mechanism of Phenylethanoid Glycosides from Corallodiscus flabellatus
Alpine plants face intense ultraviolet (UV) radiation in high-altitude ecosystems, necessitating adaptive mechanisms like tyrosinase-mediated phenolic metabolism for UV protection. This study aimed to characterize the phenolic profile of Corallodiscus flabellatus (or C. flabellata) and elucidate its mechanistic interactions with tyrosinase under high-altitude environments with intense ultraviolet (UV) radiation. Two novel phenylethanoid glycosides (PhGs) and seven known compounds were isolated using silica gel, ODS, and preparative HPLC, with structures determined via NMR, HR-ESI-MS, and acid hydrolysis. Tyrosinase (EC 1.14.18.1) inhibition assays revealed divergent effects: compound 7 (containing a caffeoyl moiety) exhibited potent inhibition (IC50 = 0.23 μM), comparable to arbutin, while other PhGs displayed activation or biphasic responses. Molecular docking analysis demonstrated that compound 7 stabilized tyrosinase via π-π stacking with Phe264 and Cu2+ coordination, whereas activating compounds likely acted as substrates. These findings elucidate the dual regulatory function of PhGs, which activate tyrosinase to counteract acute ultraviolet-induced stress and inhibit its activity to attenuate oxidative overload, thereby advancing our understanding of alpine plant adaptation mechanisms.