Discovery and identification of potential anti-melanogenic active constituents of Bletilla striata by zebrafish model and molecular docking

BMC Complementary Medicine and Therapies

Yiyuan Luo¹  Shuo Li¹  Shaojun Chen¹  Juan Wang¹  Zhirui Wang¹  Yue Wu¹  Hongjiang Chen² 

[1] College of Chinese Medicine, Zhejiang Pharmaceutical College, 315100, Ningbo, China;College of Chinese Medicine, Zhejiang Pharmaceutical College, 315100, Ningbo, China;College of Pharmacy, Nanjing University of Chinese Medicine, 210046, Nanjing, China;

关键词: Bletilla striata;    Antioxidant;    Anti-melanogenic activity;    UPLC-Q-TOF-MS/MS;    Zebrafish;    Molecular docking;   

DOI  :  10.1186/s12906-021-03492-y

来源: Springer

【 摘 要 】

BackgroundBletilla striata is the main medicine of many skin whitening classic formulas in traditional Chinese medicine (TCM) and is widely used in cosmetic industry recently. However, its active ingredients are still unclear and its fibrous roots are not used effectively. The aim of the present study is to discover and identify its potential anti-melanogenic active constituents by zebrafish model and molecular docking.MethodsThe antioxidant activities were evaluated by 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity, 2,2′-azino-bis-(3-ethylbenthiazoline-6-sulphonic acid) (ABTS) radical scavenging activity and ferric reducing antioxidant power (FRAP) assay. The anti-melanogenic activity was assessed by tyrosinase inhibitory activity in vitro and melanin inhibitory in zebrafish. The chemical profiles were performed by ultra-high-performance liquid chromatography combined with quadrupole time-of-flight tandem mass spectrometry (UPLC-Q-TOF-MS/MS). Meanwhile, the potential anti-melanogenic active constituents were temporary identified by molecular docking.ResultsThe 95% ethanol extract of B. striata fibrous roots (EFB) possessed the strongest DPPH, ABTS, FRAP and tyrosinase inhibitory activities, with IC50 5.94 mg/L, 11.69 mg/L, 6.92 mmol FeSO4/g, and 58.92 mg/L, respectively. In addition, EFB and 95% ethanol extract of B. striata tuber (ETB) significantly reduced the melanin synthesis of zebrafish embryos in a dose-dependent manner. 39 chemical compositions, including 24 stilbenoids were tentatively identified from EFB and ETB. Molecular docking indicated that there were 83 (including 60 stilbenoids) and 85 (including 70 stilbenoids) compounds exhibited stronger binding affinities toward tyrosinase and adenylate cyclase.ConclusionThe present findings supported the rationale for the use of EFB and ETB as natural skin-whitening agents in pharmaceutical and cosmetic industries.

【 授权许可】

CC BY