Affiliation:
1. Research Center of Natural Resources of Chinese Medicinal Materials and Ethnic Medicine, Jiangxi University of Traditional Chinese Medicine, Nanchang, China
2. School of Life Science and Biotechnology, Dalian University of Technology, Dalian, China
3. School of Pharmacy, Gannan Health Vocational College, Ganzhou, China
Abstract
AbstractIn an effort to identify agents from natural products that inhibit protein tyrosine phosphatase 1B (PTP1B), 5 new prenylated stilbenes, (±)-styrastilbene A (1), styrastilbene B (2), and (±)-styrastilbenes C – E (3, 4, and 7), along with 4 known structurally related compounds (5, 6, 8, and 9), were isolated from the roots of Artocarpus styracifolius. Their structures were elucidated by spectroscopic methods, including 1D and 2D nuclear magnetic resonance (NMR), high-resolution electrospray ionization mass spectrometry (HRESIMS), ultraviolet (UV), and infrared (IR). Based on these isolates, a new plausible biosynthetic pathway for the unusual stilbene derivatives 3–8 with a tetracyclic ring system is proposed. Among these compounds, 1–3, 8, and 9 displayed significant PTP1B inhibitory effects with IC50 values ranging from 2.40 (95% confidence interval [CI]: 2.21 – 2.59) to 8.80 (95% CI: 8.28 – 9.32) µM. Moreover, kinetic analysis and molecular docking simulations were performed to provide insight into the inhibition type as well as the interaction and binding mode of these active isolates with PTP1B. Our results revealed mixed-type PTP1B inhibition for all compounds tested. Docking simulations of these stilbene derivatives showed negative binding energies and close proximity to residues at the allosteric and catalytic sites of PTP1B. These findings suggest that these compounds may have a potential to be further developed as agents for the management of type 2 diabetes mellitus.
Subject
Organic Chemistry,Complementary and alternative medicine,Drug Discovery,Pharmaceutical Science,Pharmacology,Molecular Medicine,Analytical Chemistry
Cited by
11 articles.
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