Abstract:
:Botulinum neurotoxins (BoNT) are the most potent toxins known and a significant bioterrorist threat. Few small molecule compounds have been identified that are active in cell-based or animal models, potentially due to toxin enzyme plasticity. Here we screened commercially available quinolinols, as well as synthesized hydroxyquinolines. Seventy-two compounds had IC50 values below 10 μM, with the best compound exhibiting submicromolar inhibition (IC50 = 0.8 μM). Structure-activity relationship trends showed that the enzyme tolerates various substitutions at R1 but has a clear preference for bulky aryl amide groups at R2, while methylation at R3 increased inhibitor potency. Evaluation of the most potent compounds in an ADME panel showed that these compounds possess poor solubility at pH 6.8, but display excellent solubility at low pH, suggesting that oral dosing may be possible. Our data show the potential of quinolinol compounds as BoNT therapeutics due to their good in vitro potencies and favorable ADME properties.
journal_name
J Med Chemjournal_title
Journal of medicinal chemistryauthors
Caglič D,Krutein MC,Bompiani KM,Barlow DJ,Benoni G,Pelletier JC,Reitz AB,Lairson LL,Houseknecht KL,Smith GR,Dickerson TJdoi
10.1021/jm4012164subject
Has Abstractpub_date
2014-02-13 00:00:00pages
669-76issue
3eissn
0022-2623issn
1520-4804journal_volume
57pub_type
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