ArticleCombinatorial chemistry & high throughput screening2025
Study on the Mechanism of the Combination of Methotrexate and Leflunomide in the Treatment of Rheumatoid Arthritis Based on Network Pharmacology, Molecular Docking, and
Article in Combinatorial chemistry & high throughput screening, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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1 citing paper in PubMed.
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10 authors.
Funding
Abstract
backgroundTo date, disease-modifying antirheumatic drugs (DMARDs) are widely used as the primary first-line treatment option for patients with rheumatoid arthritis (RA), and the curative effect of methotrexate (MTX) and leflunomide (LEF; MTX + LEF) is greater than that of single-agent MTX therapy, but the synergistic mechanism of MTX + LEF is unclear.
methodsFirst, we explored the mechanism of action of MTX + LEF in RA through network pharmacology and molecular docking. Venn diagram analysis revealed 97 overlapping gene targets of MTX + LEF-RA and STRING, along with Cytoscape plug-in MOCDE and cytoHubba; and GO enrichment analysis revealed that the functions of 97 synergistic targets were related to 123 molecular functions (MF), 63 cell components (CC), and 1,068 biological processes (BP). The Cytoscape plug-in ClueGO demonstrated that these targets were enriched in KEGG pathways of 52 terms, whereas 9 pivotal genes were mainly involved in the signaling pathways of estrogen, Ras, Rap1, PI3K-Akt, relaxin, TNF, AMPK, FoxO, prolactin, IL-17, and adherens junction. Finally, CETSA and DARTS validated the direct binding of MTX or LEF to the selected target proteins EGFR, PPARG, MMP9, and SRC in RAW264.7 cells.
resultsWe identified 292 MTX targets and 247 LEF targets from 7 databases. Furthermore, 2,814 potential targets of RA were identified by merging 1,925 targets from 7 databases and 999 differentially expressed genes (DEGs) between normal controls and patients with RA extracted from 5 GEO databases. Nine pivotal genes, ESR1, ALB, CASP3, EGFR, HSP90AA1, SRC, MMP9, PPARG, and IGF1, were identified. Molecular docking verified that both MTX and LEF strongly bind to most of the 9 pivotal proteins except ESR1 and IGF1.
conclusionThese results contribute to our understanding of the enhancement mechanism of MTX combined with LEF and provide a targeted basis for the clinical treatment of RA.
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