2017
DOI: 10.1371/journal.pntd.0005343
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Anti-trypanosomal activity of non-peptidic nitrile-based cysteine protease inhibitors

Abstract: The cysteine protease cruzipain is considered to be a validated target for therapeutic intervention in the treatment of Chagas disease. Anti-trypanosomal activity against the CL Brener strain of T. cruzi was observed in the 0.1 μM to 1 μM range for three nitrile-based cysteine protease inhibitors based on two scaffolds known to be associated with cathepsin K inhibition. The two compounds showing the greatest potency against the trypanosome were characterized by EC50 values (0.12 μM and 0.25 μM) that were an or… Show more

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Cited by 35 publications
(30 citation statements)
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“…efeito antiparasitário e antineoplásico. Parte dessas substâncias atuam como inibidores de cisteíno proteases, com descrição de atividade inibitória em catepsina L e cruzaína, 96,97 enquanto outras agem como inibidores da via PI3K/AKT/mTOR. 98 Catepsinas são endopeptidases lisossomais que estão envolvidas na degradação terminal de proteínas.…”
Section: Mutagenicidadeunclassified
“…efeito antiparasitário e antineoplásico. Parte dessas substâncias atuam como inibidores de cisteíno proteases, com descrição de atividade inibitória em catepsina L e cruzaína, 96,97 enquanto outras agem como inibidores da via PI3K/AKT/mTOR. 98 Catepsinas são endopeptidases lisossomais que estão envolvidas na degradação terminal de proteínas.…”
Section: Mutagenicidadeunclassified
“…In light of that, we designed and synthesized 24 non-dipeptidyl nitrile covalent inhibitors of Cz and two new dipeptidyl nitriles (Table 3). Methyl esters were produced from the commercial D-or L-amino acids, using thionyl chloride in dry methanol, following the procedure previously described (BURTOLOSO et al, 2017). The following step consisted in the preparation of the 2,2,2-trifluorophenyl amino acid intermediates, as previously described with slight modifications such as completely absence of water, and use of DME as a solvent for diastereoselective reduction of the imine to the desired amine with Zn(BH4)2 (HUGHES et al, 2007).…”
Section: Design Synthesis and Sar Of Nitrile Based Cruzain Inhibitorsmentioning
confidence: 99%
“…(chapter IV), over the last year our group focused on the synthesis of new derivates where the carbonyl group in P3/P2 position is replaced with a trifluoromethyl group (-CF3)(BURTOLOSO et al, 2017) and where the affinity is maintained or increased. However, this kind of replacement brought two challenges:increase number of chiral centers and higher cost of production.…”
mentioning
confidence: 99%
“…Todos os compostos foram caracterizados como inibidores potentes da cisteíno protease [39], [40]. Em particular, são potentes inibidores da cruzaína, uma forma recombinante de cruzipaína [39].…”
Section: Avaliação Da Inibição Da Atividade Proteolíticaunclassified