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Synthesis, structure, and activity of diclofenac analogues as transthyretin amyloid fibril formation inhibitors. 2002
Vibha B Oza, and
Craig Smith, and
Prakash Raman, and
Edward K Koepf, and
Hilal A Lashuel, and
H Mike Petrassi, and
Kyle P Chiang, and
Evan T Powers, and
James Sachettinni, and
Jeffery W Kelly
Department of Chemistry and The Skaggs Institute of Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, BCC 265, La Jolla, California 92037, USA.
Twelve analogues of diclofenac (1), a nonsteroidal antiinflammatory drug and known inhibitor of transthyretin (TTR) amyloid formation, were prepared and evaluated as TTR amyloid formation inhibitors. High activity was exhibited by five of the compounds. Structure-activity relationships reveal that a carboxylic acid is required for activity, but changes in its position as well as the positions of other substituents are tolerated. High-resolution X-ray crystal structures of four of the active compounds bound to TTR were obtained. These demonstrate the significant flexibility with which TTR can accommodate ligands within its two binding sites.
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