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Solvent Selection for Insoluble Ligands, a Challenge for Biological Assay Development: A TNF-α/SPD304 Study

Solvent Selection for Insoluble Ligands, a Challenge for Biological Assay Development: A TNF-α/SPD304 Study

Christos P Papaneophytou, Anthi K Mettou, Vagelis Rinotas, Eleni Douni, George A Kontopidis

ACS Med Chem Lett. 2012 Nov 29;4(1):137-41.

PMID: 24900576

Abstract:

Many active compounds may be excluded from biological assays due to their low aqueous solubility. In this study, a simple method for the determination of the solubility of compounds containing aromatic rings is proposed. In addition to DMSO, five organic solvents for screening experiments of TNF-α inhibitors were explored. DMSO and PEG3350 were the most suitable for both protein stability and ligand-binding experiments. In addition, glycerol is a promising solvent for the screening of other compounds for which it might provide acceptable solubilization, due to its strong tendency to preserve the protein. Moreover, a fluorescence binding assay was developed using the TNF-α/SPD304 system, and a K d of 5.36 ± 0.21 μM was determined. The results of this study could be used for the future screening of potential TNF-α inhibitors, while the protocols developed in this work could be applied to other proteins.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
IAR4244986	SPD304			Price

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