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Maenpuen S, Mee-Udorn P, Pinthong C, Athipornchai A, Phiwkaow K, Watchasit S, Pimviriyakul P, Rungrotmongkol T, Tinikul R, Leartsakulpanich U, Chitnumsub P. Mangiferin is a new potential antimalarial and anticancer drug for targeting serine hydroxymethyltransferase. Arch Biochem Biophys 2023; 745:109712. [PMID: 37543353 DOI: 10.1016/j.abb.2023.109712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 08/02/2023] [Accepted: 08/02/2023] [Indexed: 08/07/2023]
Abstract
Mangiferin, a polyphenolic xanthone glycoside found in various botanical sources, including mango (Mangifera indica L.) leaves, can exhibit a variety of bioactivities. Although mangiferin has been reported to inhibit many targets, none of the studies have investigated the inhibition of serine hydroxymethyltransferase (SHMT), an attractive target for antimalarial and anticancer drugs. SHMT, one of the key enzymes in the deoxythymidylate synthesis cycle, catalyzes the reversible conversion of l-serine and (6S)-tetrahydrofolate (THF) into glycine and 5,10-methylene THF. Here, in vitro and in silico studies were used to probe how mangiferin isolated from mango leaves inhibits Plasmodium falciparum and human cytosolic SHMTs. The inhibition kinetics at pH 7.5 revealed that mangiferin is a competitive inhibitor against THF for enzymes from both organisms. Molecular docking and molecular dynamic (MD) simulations demonstrated the inhibitory effects of the deprotonated forms of mangiferin, specifically the C6-O- species and its resonance C9-O- species appearing at pH 7.5, combined with two docked poses, either a xanthone or glucose moiety, placed inside the THF-binding pocket. The MD analysis revealed that both C6-O- and its resonance-stabilized C9-O- species can favorably bind to SHMT in a similar fashion to THF, supporting the THF competitive inhibition of mangiferin. In addition, characterization of the proton dissociation equilibria of isolated mangiferin revealed that only three hydroxy groups of the xanthone moiety, C6-OH, C3-OH, and C7-OH, underwent varying degrees of deprotonation with pKa values of 6.38 ± 0.11, 8.21 ± 0.35, and 12.37 ± 0.30, respectively, while C1-OH remained protonated. Altogether, our findings demonstrate a new bioactivity of mangiferin and provide the basis for the future development of mangiferin as a potent antimalarial and anticancer drug.
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Affiliation(s)
- Somchart Maenpuen
- Department of Biochemistry, Faculty of Science, Burapha University, Chonburi, 20131, Thailand.
| | - Pitchayathida Mee-Udorn
- National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), 113 Thailand Science Park, Phahonyothin road, Khlong Nueng, Khlong Luang, Pathum Thani, 12120, Thailand
| | - Chatchadaporn Pinthong
- Department of Chemistry, Faculty of Science, Srinakharinwirot University, Bangkok, 10110, Thailand
| | - Anan Athipornchai
- The Research Unit in Synthetic Compounds and Synthetic Analogues from Natural Product for Drug Discovery, Center of Excellence for Innovation in Chemistry and Department of Chemistry, Faculty of Science, Burapha University, Chonburi, 20131, Thailand
| | - Kochakorn Phiwkaow
- Department of Biochemistry, Faculty of Science, Burapha University, Chonburi, 20131, Thailand
| | - Sarayut Watchasit
- Nuclear Magnetic Resonance Spectroscopic Laboratory, Science Innovation Facility, Faculty of Science, Burapha University, Chonburi, 20131, Thailand
| | - Panu Pimviriyakul
- Department of Biochemistry, Faculty of Science, Kasetsart University, Bangkok, 10900, Thailand
| | - Thanyada Rungrotmongkol
- Center of Excellence in Biocatalyst and Sustainable Biotechnology, Department of Biochemistry, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Ruchanok Tinikul
- Department of Biochemistry and Center for Excellence in Protein and Enzyme Technology, Faculty of Science, Mahidol University, Bangkok, 10400, Thailand
| | - Ubolsree Leartsakulpanich
- National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), 113 Thailand Science Park, Phahonyothin road, Khlong Nueng, Khlong Luang, Pathum Thani, 12120, Thailand
| | - Penchit Chitnumsub
- National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), 113 Thailand Science Park, Phahonyothin road, Khlong Nueng, Khlong Luang, Pathum Thani, 12120, Thailand
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Yu P, Chen Z, Liu Y, Gu Z, Wang X, Zhang Y, Ma Y, Dong M, Tian Z. Bioactivity-Guided Separation of Anti-Cholinesterase Alkaloids from Uncaria rhynchophlly (Miq.) Miq. Ex Havil Based on HSCCC Coupled with Molecular Docking. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27062013. [PMID: 35335376 PMCID: PMC8949104 DOI: 10.3390/molecules27062013] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Revised: 03/14/2022] [Accepted: 03/18/2022] [Indexed: 11/29/2022]
Abstract
As an important source of cholinesterase inhibitors, alkaloids in natural products have high potential value in terms of exerting pharmacological activities. In this study, a strategy for targeted preparation of cholinesterase inhibitors in Uncaria rhynchophlly (Miq.) Miq. ex Havil (UR) by high-speed counter-current chromatography was provided. In the method, a two-phase polar solvent system composed of ethyl acetate/n-butanol/water (1:4:5, v/v/v) was used, which isolated five alkaloids from the UR extract for the first time. All alkaloids were identified by HR-ESI-MS and NMR as 7-epi-javaniside (1), vincosamide (2), strictosamide (3), cadambine (4), and 3α-dihydrocadambine (5). The poorly resolved compounds 2 and 3 were separated by preparative HPLC (prep-HPLC). Among them, compounds 1, 4, and 5 were firstly obtained from UR. The purity of these plant isolates was 98.8%, 98.7%, 99.2%, 95.7%, and 98.5%, respectively. Compounds 1–5 exhibited an inhibitory effect on acetyl-cholinesterase and butyryl-cholinesterase with an IC50 from 1.47 to 23.24 µg/mL and 1.01 to 18.24 µg/mL. Molecular docking and inhibitory activities indicated that compound 1 showed stronger inhibitory activity on acetyl-cholinesterase and butyryl-cholinesterase.
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Affiliation(s)
- Pengfei Yu
- School of Pharmacy, Shandong University of Traditional Chinese Medicine, Jinan 250355, China; (P.Y.); (Z.C.); (Y.Z.); (M.D.)
- Inner MenGolia Mengqi Pharmaceutical Co. Ltd., Huhhot 011700, China
| | - Zhenshan Chen
- School of Pharmacy, Shandong University of Traditional Chinese Medicine, Jinan 250355, China; (P.Y.); (Z.C.); (Y.Z.); (M.D.)
| | - Yuecheng Liu
- Shandong Academy of Traditional Chinese Medicine, Jinan 250014, China;
| | - Zhengwei Gu
- Experimental Center, Shandong University of Traditional Chinese Medicine, Jinan 250355, China; (Z.G.); (X.W.); (Y.M.)
| | - Xiaoming Wang
- Experimental Center, Shandong University of Traditional Chinese Medicine, Jinan 250355, China; (Z.G.); (X.W.); (Y.M.)
| | - Yaowen Zhang
- School of Pharmacy, Shandong University of Traditional Chinese Medicine, Jinan 250355, China; (P.Y.); (Z.C.); (Y.Z.); (M.D.)
| | - Yanni Ma
- Experimental Center, Shandong University of Traditional Chinese Medicine, Jinan 250355, China; (Z.G.); (X.W.); (Y.M.)
| | - Meiyue Dong
- School of Pharmacy, Shandong University of Traditional Chinese Medicine, Jinan 250355, China; (P.Y.); (Z.C.); (Y.Z.); (M.D.)
| | - Zhenhua Tian
- Experimental Center, Shandong University of Traditional Chinese Medicine, Jinan 250355, China; (Z.G.); (X.W.); (Y.M.)
- Correspondence: ; Tel.: +86-0531-89628192
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