Abstract:
:Macrophage migration inhibitory factor (MIF) is a cytokine with key roles in inflammation and cancer, which qualifies it as a potential drug target. Apart from its cytokine activity, MIF also harbors enzyme activity for keto-enol tautomerization. MIF enzymatic activity has been used for identification of MIF binding molecules that also interfere with its biological activity. However, MIF tautomerase activity assays are troubled by irregularities, thus creating a need for alternative methods. In this study, we identified a 7-hydroxycoumarin fluorophore with high affinity for the MIF tautomerase active site (Ki = 18 ± 1 nM) that binds with concomitant quenching of its fluorescence. This property enabled development of a novel competition-based assay format to quantify MIF binding. We also demonstrated that the 7-hydroxycoumarin fluorophore interfered with the MIF-CD74 interaction and inhibited proliferation of A549 cells. Thus, we provide a high-affinity MIF binder as a novel tool to advance MIF-oriented research.
journal_name
J Med Chemjournal_title
Journal of medicinal chemistryauthors
Xiao Z,Chen D,Song S,van der Vlag R,van der Wouden PE,van Merkerk R,Cool RH,Hirsch AKH,Melgert BN,Quax WJ,Poelarends GJ,Dekker FJdoi
10.1021/acs.jmedchem.0c01160subject
Has Abstractpub_date
2020-10-22 00:00:00pages
11920-11933issue
20eissn
0022-2623issn
1520-4804journal_volume
63pub_type
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