Journal
CHEMMEDCHEM
Volume 6, Issue 1, Pages 115-130Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cmdc.201000383
Keywords
drug discovery; indoles; medicinal chemistry; prion disease; structure-activity relationships
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Funding
- BBSRC [BB/E014119/1]
- Home Office [04-07-270]
- Engineering and Physical Sciences Research Council [EP/I037296/1] Funding Source: researchfish
- EPSRC [EP/I037296/1] Funding Source: UKRI
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Structure-activity relationships within the indole-3-glyoxylamide series of antiprion agents have been explored further, resulting in discovery of several new compounds demonstrating excellent activity in a cell line model of prion disease (EC50 < 10 nm). After examining a range of substituents at the para-position of the N-phenylglyoxylamide moiety, five-membered heterocycles containing at least two heteroatoms were found to be optimal for the antiprion effect. A number of modifications were made to probe the importance of the glyoxylamide substructure, although none were well tolerated. The most potent compounds did, however, prove largely stable towards microsomal metabolism, and the most active library member cured scrapie-infected cells indefinitely on administration of a single treatment. The present results thereby confirm the indole-3-glyoxylamides as a promising lead series for continuing in vitro and in vivo evaluation against prion disease.
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