Abstract | BACKGROUND: METHODS: A high-throughput screening (HTS) assay in vitro against SmTGR was developed and applied to a diverse compound library. SmTGR activity was quantified with ThioGlo®, a reagent that fluoresces upon binding to the free sulfhydryl groups of the reaction product GSH ( reduced glutathione). RESULTS: We implemented an HTS effort against 59,360 synthetic compounds. In the primary screening, initial hits (928 or 1.56 %) showing greater than 90 % inhibition on SmTGR activity at a final concentration of 10 μM for each compound were identified. Further tests were carried out to confirm the effects of these hits and to explore the concentration-dependent response characteristics. As a result, 74 of them (0.12 %) representing 17 chemical scaffolds were confirmed and showed a great concentration-dependent inhibitory trend against SmTGR, including structures previously shown to be lethal to schistosomal growth. Of these, two scaffolds displayed a limited structure-activity relationship. When tested in cultured larvae, 39 compounds had cidal activity in 48 h, and five of them killed larvae completely at 3.125 μM. Of these, three compounds also killed adult worms ex vivo at concentrations between 5 μM and 10 μM. CONCLUSION:
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Authors | Ting Li, Peter D Ziniel, Pan-Qing He, Valerie P Kommer, Gregory J Crowther, Min He, Qing Liu, Wesley C Van Voorhis, David L Williams, Ming-Wei Wang |
Journal | Infectious diseases of poverty
(Infect Dis Poverty)
Vol. 4
Pg. 40
(Aug 31 2015)
ISSN: 2095-5162 [Print] England |
PMID | 26341081
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
- Enzyme Inhibitors
- Multienzyme Complexes
- Schistosomicides
- Small Molecule Libraries
- NADH, NADPH Oxidoreductases
- thioredoxin glutathione reductase
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Topics |
- Animals
- Drug Evaluation, Preclinical
- Enzyme Inhibitors
(pharmacology)
- High-Throughput Screening Assays
(methods, standards)
- Humans
- Multienzyme Complexes
(antagonists & inhibitors)
- NADH, NADPH Oxidoreductases
(antagonists & inhibitors)
- Parasitic Sensitivity Tests
- Reproducibility of Results
- Schistosoma mansoni
(drug effects, enzymology)
- Schistosomiasis
(drug therapy)
- Schistosomicides
(pharmacology)
- Small Molecule Libraries
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