An in silico Workflow that Yields Experimentally Comparable Inhibitors for Human Dihydroorotate Dehydrogenase

Author(s): Sucharita M., Poorani B., Priya Swaminathan*

Journal Name: Current Computer-Aided Drug Design

Volume 16 , Issue 3 , 2020

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Abstract:

Introduction: Rheumatoid Arthritis [RA] is an autoimmune disease that can cause chronic inflammation of the joints. Human DiHydroOrotate DeHydrogenase [DHODH] is a clinically validated drug target for the treatment of Rheumatoid Arthritis. DHODH inhibition results in beneficial immunosuppressant and anti-proliferative effects.

Materials and Methods: Leflunomide [LEF] and Brequinar Sodium [BREQ], drugs used in the treatment of RA, suppresses the immune cells responsible for inflammation but has several side-effects, most predominant being symptomatic liver damage and toxicity. An existing scaffold based on structural analogies with LEF and BREQ was used to screen out potent inhibitors of DHODH, in ZINC Database using 2D binary fingerprint. 10 structures similar to the scaffold were shortlisted due to their Tanimoto similarity coefficient. Selected structures were docked using the tools AutoDock, Ligand fit and iGEMDOCK with target human DHODH. High scoring compounds having similar interactions as that of scaffold were checked to evaluate their Drug-Likeliness.

Results: The five shortlisted compounds were then subjected to Molecular Dynamics Simulation studies for 50ns using GROMACS. Measures of structural similarity based on 2D Fingerprint Screening and Molecular Dynamics Simulation studies can suggest good leads for drug designing. The novelty of this study is that the workflow used here yields the same results that are at par with the experimental data.

Conclusion: This suggests the use of the 2D fingerprint similarity search in various databases, followed by multiple docking algorithms and dynamics as a workflow that will lead to finding novel compounds that a structurally and functionally similar to LEF and BREQ.

Keywords: DHODH, scaffold, 2D binary fingerprints, molecular dynamics simulation leflunomide, brequinar sodium, dehydrogenase.

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Article Details

VOLUME: 16
ISSUE: 3
Year: 2020
Page: [340 - 350]
Pages: 11
DOI: 10.2174/1573409915666190528114703
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