5-Benzylidene-hydantoin is a new scaffold for SIRT inhibition: From virtual screening to activity assays

Sirtuins (SIRTs) are a family of enzymes able to catalyze the deacetylation of the N-acetyl lysines of both histone and non-histone substrates. Inhibition of SIRTs catalytic activity was recently reported in the literature as being beneficial in human diseases, with very promising applications in ca...

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Bibliographic Details
Published in:European journal of pharmaceutical sciences 2016-03, Vol.85, p.59-67
Main Authors: Sacconnay, Lionel, Ryckewaert, Lucie, Randazzo, Giuseppe Marco, Petit, Charlotte, Passos, Carolina Dos Santos, Jachno, Jelena, Michailovienė, Vilma, Zubrienė, Asta, Matulis, Daumantas, Carrupt, Pierre-Alain, Simões-Pires, Claudia Avello, Nurisso, Alessandra
Format: Article
Language:English
Subjects:
5-Benzylidene-hydantoin
Acetylation - drug effects
Benzylidene Compounds - chemistry
Benzylidene Compounds - pharmacology
Enzymology
HeLa Cells
Histone Deacetylase Inhibitors - chemistry
Histone Deacetylase Inhibitors - pharmacology
Humans
Hydantoins - chemistry
Hydantoins - pharmacology
Kinetics
Lysine - metabolism
Molecular dynamics
p53 acetylation
PAMPA
Sirtuins
Sirtuins - antagonists & inhibitors
Virtual screening
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Summary:Sirtuins (SIRTs) are a family of enzymes able to catalyze the deacetylation of the N-acetyl lysines of both histone and non-histone substrates. Inhibition of SIRTs catalytic activity was recently reported in the literature as being beneficial in human diseases, with very promising applications in cancer therapy and enzymatic neurodegeneration. By combining a structure-based virtual screening of the Specs database with cell-based assays, we identified the 5-benzylidene-hydantoin as new scaffold for the inhibition of SIRT2 catalytic activity. Compound 97 (Specs ID AH-487/41657829), active in the low μM range against SIRT2, showed the optimal physicochemical properties for passive absorption as well as relatively low cytotoxicity in vitro. Further studies revealed non-competitive and mixed-type kinetics toward acetyl-lysine substrates and NAD+, respectively, and a non-selective profile for SIRT inhibition. A binding mode consistent with the experimental evidence was proposed by molecular modeling. Additionally, the levels of acetyl-p53 were shown to be increased in HeLa cells treated with 97. Taken together, these results encourage further investigation of 5-benzylidene-hydantoin derivatives for their SIRT-related therapeutic effects.
ISSN:0928-0987
1879-0720
DOI:10.1016/j.ejps.2016.01.010