Virtual Screening of Some Active Human Macrophage Migration Inhibitory Factor Antagonists.

Area of Science:

• Biochemistry
• Pharmacology
• Computational Chemistry

Background:

• Macrophage migration inhibitory factor (MIF) is a cytokine implicated in inflammatory, autoimmune, infectious, and oncogenic diseases.
• Inhibiting MIF's tautomerase activity with small compounds shows therapeutic potential in disease models.

Purpose of the Study:

• To virtually screen for novel compounds that inhibit the tautomerase activity of MIF.
• To identify and experimentally validate potent MIF tautomerase inhibitors with unique chemical scaffolds.

Main Methods:

• Virtual screening of the ZINC database using the OXIM-11 structure as a query.
• Compound selection via Sfilter (2D scaffold comparison) and ADDock (docking method).
• Experimental validation of 17 selected compounds using IC50 assays with THP-1 cell lysate and purified recombinant human MIF protein.

Main Results:

• Three compounds (ZINC02693801, ZINC00141102, ZINC12368346) exhibited superior MIF tautomerase inhibitory activity (IC50) compared to the standard inhibitor ISO-1.
• The identified active compounds possess novel chemical scaffolds distinct from previously reported inhibitors.
• Experimental validation confirmed the inhibitory potential of the screened compounds.

Conclusions:

• The virtual screening approach successfully identified novel, potent inhibitors of MIF tautomerase activity.
• The discovered compounds represent promising leads for developing new therapeutics for MIF-related diseases.
• The unique scaffolds offer new avenues for drug design targeting MIF.