title: Inhibitors of cell migration that inhibit intracellular paxillin/alpha4 binding: a well-documented use of positional scanning libraries.
abstract: Screening combinatorial libraries for inhibition of Paxillin binding to the cytoplasmic tail of the integrin alpha4 provided the first inhibitors of this protein-protein interaction implicated in enhanced rates of cell migration and chronic inflammation. The preparation of substructure analogs of the lead identified features required for activity, those available for modification, and those that may be removed. The most potent lead structure was shown to inhibit alpha(4)beta(1)-mediated human Jurkat T cell migration in a dose-dependent manner, validating the intracellular Paxillin/alpha4 interaction as a useful and unique target for therapeutic intervention. Moreover, the lead structure emerged from a library that was prepared in two formats: (1) a traditional small mixture format composed of 100 mixtures of 10 compounds and (2) a positional scanning library. Their parallel testing provided the rare opportunity to critically compare two approaches.
authors.affiliation: Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.
authors.forename: Yves
authors.initials: Y
authors.lastname: Ambroise
authors.forename: Brian
authors.initials: B
authors.lastname: Yaspan
authors.forename: Mark H
authors.initials: MH
authors.lastname: Ginsberg
authors.forename: Dale L
authors.initials: DL
authors.lastname: Boger
mesh_terms: D002634:Chemotaxis, Leukocyte / Q000187:drug effects*; D020650:Combinatorial Chemistry Techniques; D003598:Cytoskeletal Proteins / Q000187:drug effects / Q000378:metabolism*; D004305:Dose-Response Relationship, Drug; D004353:Drug Evaluation, Preclinical / Q000379:methods; D006801:Humans; D039441:Integrin alpha4 / Q000187:drug effects / Q000378:metabolism*; D019169:Jurkat Cells; D015394:Molecular Structure; D051419:Paxillin; D010750:Phosphoproteins / Q000187:drug effects / Q000378:metabolism*; D011485:Protein Binding / Q000187:drug effects; D013329:Structure-Activity Relationship
chemical_list: D003598:Cytoskeletal Proteins; C496061:PXN protein, human; D051419:Paxillin; D010750:Phosphoproteins; D039441:Integrin alpha4