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Benzoylphenyl thiocyanates are new, effective inhibitors of the mycobacterial resuscitation promoting factor B protein

BACKGROUND: Resuscitation promoting factors (Rpfs) are the proteins involved in the process of reactivation of the dormant cells of mycobacteria. Recently a new class of nitrophenylthiocyanates (NPTs), capable of inhibiting the biological and enzymatic activities of Rpfs has been discovered. In the...

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Autores principales: Demina, Galina R., Nikitushkin, Vadim D., Shleeva, Margarita O., Riabova, Olga B., Lepioshkin, Alexander Yu., Makarov, Vadim A., Kaprelyants, Arseny S.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5667462/
https://www.ncbi.nlm.nih.gov/pubmed/29096645
http://dx.doi.org/10.1186/s12941-017-0244-7
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author Demina, Galina R.
Nikitushkin, Vadim D.
Shleeva, Margarita O.
Riabova, Olga B.
Lepioshkin, Alexander Yu.
Makarov, Vadim A.
Kaprelyants, Arseny S.
author_facet Demina, Galina R.
Nikitushkin, Vadim D.
Shleeva, Margarita O.
Riabova, Olga B.
Lepioshkin, Alexander Yu.
Makarov, Vadim A.
Kaprelyants, Arseny S.
author_sort Demina, Galina R.
collection PubMed
description BACKGROUND: Resuscitation promoting factors (Rpfs) are the proteins involved in the process of reactivation of the dormant cells of mycobacteria. Recently a new class of nitrophenylthiocyanates (NPTs), capable of inhibiting the biological and enzymatic activities of Rpfs has been discovered. In the current study the inhibitory properties of the compounds containing both nitro and thiocyanate groups alongside with the compounds with the modified number and different spatial location of the substituents are compared. METHODS: New benzoylphenyl thiocyanates alongside with nitrophenylthiocyanates were tested in the enzymatic assay of bacterial peptidoglycan hydrolysis as well as against strains of several actinobacteria (Mycobacterium smegmatis, Mycobacterium tuberculosis) on in-lab developed models of resuscitation of the dormant forms. RESULTS: Introduction of the additional nitro and thiocyanate groups to the benzophenone scaffold did not influence the inhibitory activity of the compounds. Removal of the nitro groups analogously did not impair the functional properties of the molecules. Among the tested compounds two molecules without nitro group: 3-benzoylphenyl thiocyanate and 4-benzoylphenyl thiocyanate demonstrated the maximum activity in both enzymatic assay (inhibition of the Rpf-mediated peptidoglycan hydrolysis) and in the resuscitation assay of the dormant M. tuberculosis cells. CONCLUSIONS: The current study demonstrates dispensability of the nitro group in the NPT’s structure for inhibition of the enzymatic and biological activities of the Rpf protein molecules. These findings provide new prospects in anti-TB drug discovery especially in finding of molecular scaffolds effective for the latent infection treatment. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (10.1186/s12941-017-0244-7) contains supplementary material, which is available to authorized users.
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spelling pubmed-56674622017-11-08 Benzoylphenyl thiocyanates are new, effective inhibitors of the mycobacterial resuscitation promoting factor B protein Demina, Galina R. Nikitushkin, Vadim D. Shleeva, Margarita O. Riabova, Olga B. Lepioshkin, Alexander Yu. Makarov, Vadim A. Kaprelyants, Arseny S. Ann Clin Microbiol Antimicrob Research BACKGROUND: Resuscitation promoting factors (Rpfs) are the proteins involved in the process of reactivation of the dormant cells of mycobacteria. Recently a new class of nitrophenylthiocyanates (NPTs), capable of inhibiting the biological and enzymatic activities of Rpfs has been discovered. In the current study the inhibitory properties of the compounds containing both nitro and thiocyanate groups alongside with the compounds with the modified number and different spatial location of the substituents are compared. METHODS: New benzoylphenyl thiocyanates alongside with nitrophenylthiocyanates were tested in the enzymatic assay of bacterial peptidoglycan hydrolysis as well as against strains of several actinobacteria (Mycobacterium smegmatis, Mycobacterium tuberculosis) on in-lab developed models of resuscitation of the dormant forms. RESULTS: Introduction of the additional nitro and thiocyanate groups to the benzophenone scaffold did not influence the inhibitory activity of the compounds. Removal of the nitro groups analogously did not impair the functional properties of the molecules. Among the tested compounds two molecules without nitro group: 3-benzoylphenyl thiocyanate and 4-benzoylphenyl thiocyanate demonstrated the maximum activity in both enzymatic assay (inhibition of the Rpf-mediated peptidoglycan hydrolysis) and in the resuscitation assay of the dormant M. tuberculosis cells. CONCLUSIONS: The current study demonstrates dispensability of the nitro group in the NPT’s structure for inhibition of the enzymatic and biological activities of the Rpf protein molecules. These findings provide new prospects in anti-TB drug discovery especially in finding of molecular scaffolds effective for the latent infection treatment. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (10.1186/s12941-017-0244-7) contains supplementary material, which is available to authorized users. BioMed Central 2017-11-02 /pmc/articles/PMC5667462/ /pubmed/29096645 http://dx.doi.org/10.1186/s12941-017-0244-7 Text en © The Author(s) 2017 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.
spellingShingle Research
Demina, Galina R.
Nikitushkin, Vadim D.
Shleeva, Margarita O.
Riabova, Olga B.
Lepioshkin, Alexander Yu.
Makarov, Vadim A.
Kaprelyants, Arseny S.
Benzoylphenyl thiocyanates are new, effective inhibitors of the mycobacterial resuscitation promoting factor B protein
title Benzoylphenyl thiocyanates are new, effective inhibitors of the mycobacterial resuscitation promoting factor B protein
title_full Benzoylphenyl thiocyanates are new, effective inhibitors of the mycobacterial resuscitation promoting factor B protein
title_fullStr Benzoylphenyl thiocyanates are new, effective inhibitors of the mycobacterial resuscitation promoting factor B protein
title_full_unstemmed Benzoylphenyl thiocyanates are new, effective inhibitors of the mycobacterial resuscitation promoting factor B protein
title_short Benzoylphenyl thiocyanates are new, effective inhibitors of the mycobacterial resuscitation promoting factor B protein
title_sort benzoylphenyl thiocyanates are new, effective inhibitors of the mycobacterial resuscitation promoting factor b protein
topic Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5667462/
https://www.ncbi.nlm.nih.gov/pubmed/29096645
http://dx.doi.org/10.1186/s12941-017-0244-7
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