A study of flavonoid inhibitors against Monkeypox H1 phosphatase
Poxviruses regulate their replication cycle through host phosphorylation pathways, with dual-specific phosphatase H1(DUSP-H1) playing a key role in immune evasion by dephosphorylating STAT1 and inhibiting interferon(IFN) responses. Given its high conservation across orthopoxviruses, it represents a...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Taylor & Francis Group
2025-12-01
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| Series: | Journal of Enzyme Inhibition and Medicinal Chemistry |
| Subjects: | |
| Online Access: | https://www.tandfonline.com/doi/10.1080/14756366.2025.2535585 |
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| Summary: | Poxviruses regulate their replication cycle through host phosphorylation pathways, with dual-specific phosphatase H1(DUSP-H1) playing a key role in immune evasion by dephosphorylating STAT1 and inhibiting interferon(IFN) responses. Given its high conservation across orthopoxviruses, it represents a promising antiviral target. This study screened a flavonoid library against DUSP-H1 from monkeypox virus (mDUSP-H1) using a malachite green-based phosphatase assay, identifying Myricetin, (−)-Gallocatechin, Cupressuflavone, (−)-Epigallocatechin gallate, Baicalein, and Herbacetin as potent mDUSP-H1 inhibitors (IC50: 7.07–14.05 μM). Docking analysis revealed key hydrogen bonding interactions between 5,7-hydroxyl groups of the hydroxyflavone backbone and Asp79 and Arg116 of mDUSP-H1, respectively. Additional interactions with Ser23 via the 3’-hydroxyl group seems to enhance binding and effectively blocking the enzyme’s active site. These findings align with previous studies on tyrosine phosphatase inhibitors, supporting flavonoids as broad-spectrum viral phosphatase inhibitors. Further structural and pharmacokinetic studies will aid in developing optimised antiviral therapies against monkeypox, variola, and cowpox viruses. |
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| ISSN: | 1475-6366 1475-6374 |