The transcriptome of Balamuthia mandrillaris trophozoites for structure-guided drug design

Abstract Balamuthia mandrillaris, a pathogenic free-living amoeba, causes cutaneous skin lesions as well as granulomatous amoebic encephalitis, a ‘brain-eating’ disease. As with the other known pathogenic free-living amoebas (Naegleria fowleri and Acanthamoeba species), drug discovery efforts to com...

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Autores principales: Isabelle Q. Phan, Christopher A. Rice, Justin Craig, Rooksana E. Noorai, Jacquelyn R. McDonald, Sandhya Subramanian, Logan Tillery, Lynn K. Barrett, Vijay Shankar, James C. Morris, Wesley C. Van Voorhis, Dennis E. Kyle, Peter J. Myler
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Publicado: Nature Portfolio 2021
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spelling oai:doaj.org-article:2f6501344d864a2aaccaf8376c641a802021-11-08T10:46:39ZThe transcriptome of Balamuthia mandrillaris trophozoites for structure-guided drug design10.1038/s41598-021-99903-82045-2322https://doaj.org/article/2f6501344d864a2aaccaf8376c641a802021-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-99903-8https://doaj.org/toc/2045-2322Abstract Balamuthia mandrillaris, a pathogenic free-living amoeba, causes cutaneous skin lesions as well as granulomatous amoebic encephalitis, a ‘brain-eating’ disease. As with the other known pathogenic free-living amoebas (Naegleria fowleri and Acanthamoeba species), drug discovery efforts to combat Balamuthia infections of the central nervous system are sparse; few targets have been validated or characterized at the molecular level, and little is known about the biochemical pathways necessary for parasite survival. Current treatments of encephalitis due to B. mandrillaris lack efficacy, leading to case fatality rates above 90%. Using our recently published methodology to discover potential drugs against pathogenic amoebas, we screened a collection of 85 compounds with known antiparasitic activity and identified 59 compounds that impacted the growth of Balamuthia trophozoites at concentrations below 220 µM. Since there is no fully annotated genome or proteome of B. mandrillaris, we sequenced and assembled its transcriptome from a high-throughput RNA-sequencing (RNA-Seq) experiment and located the coding sequences of the genes potentially targeted by the growth inhibitors from our compound screens. We determined the sequence of 17 of these target genes and obtained expression clones for 15 that we validated by direct sequencing. These will be used in the future in combination with the identified hits in structure guided drug discovery campaigns to develop new approaches for the treatment of Balamuthia infections.Isabelle Q. PhanChristopher A. RiceJustin CraigRooksana E. NooraiJacquelyn R. McDonaldSandhya SubramanianLogan TilleryLynn K. BarrettVijay ShankarJames C. MorrisWesley C. Van VoorhisDennis E. KylePeter J. MylerNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-13 (2021)
institution DOAJ
collection DOAJ
language EN
topic Medicine
R
Science
Q
spellingShingle Medicine
R
Science
Q
Isabelle Q. Phan
Christopher A. Rice
Justin Craig
Rooksana E. Noorai
Jacquelyn R. McDonald
Sandhya Subramanian
Logan Tillery
Lynn K. Barrett
Vijay Shankar
James C. Morris
Wesley C. Van Voorhis
Dennis E. Kyle
Peter J. Myler
The transcriptome of Balamuthia mandrillaris trophozoites for structure-guided drug design
description Abstract Balamuthia mandrillaris, a pathogenic free-living amoeba, causes cutaneous skin lesions as well as granulomatous amoebic encephalitis, a ‘brain-eating’ disease. As with the other known pathogenic free-living amoebas (Naegleria fowleri and Acanthamoeba species), drug discovery efforts to combat Balamuthia infections of the central nervous system are sparse; few targets have been validated or characterized at the molecular level, and little is known about the biochemical pathways necessary for parasite survival. Current treatments of encephalitis due to B. mandrillaris lack efficacy, leading to case fatality rates above 90%. Using our recently published methodology to discover potential drugs against pathogenic amoebas, we screened a collection of 85 compounds with known antiparasitic activity and identified 59 compounds that impacted the growth of Balamuthia trophozoites at concentrations below 220 µM. Since there is no fully annotated genome or proteome of B. mandrillaris, we sequenced and assembled its transcriptome from a high-throughput RNA-sequencing (RNA-Seq) experiment and located the coding sequences of the genes potentially targeted by the growth inhibitors from our compound screens. We determined the sequence of 17 of these target genes and obtained expression clones for 15 that we validated by direct sequencing. These will be used in the future in combination with the identified hits in structure guided drug discovery campaigns to develop new approaches for the treatment of Balamuthia infections.
format article
author Isabelle Q. Phan
Christopher A. Rice
Justin Craig
Rooksana E. Noorai
Jacquelyn R. McDonald
Sandhya Subramanian
Logan Tillery
Lynn K. Barrett
Vijay Shankar
James C. Morris
Wesley C. Van Voorhis
Dennis E. Kyle
Peter J. Myler
author_facet Isabelle Q. Phan
Christopher A. Rice
Justin Craig
Rooksana E. Noorai
Jacquelyn R. McDonald
Sandhya Subramanian
Logan Tillery
Lynn K. Barrett
Vijay Shankar
James C. Morris
Wesley C. Van Voorhis
Dennis E. Kyle
Peter J. Myler
author_sort Isabelle Q. Phan
title The transcriptome of Balamuthia mandrillaris trophozoites for structure-guided drug design
title_short The transcriptome of Balamuthia mandrillaris trophozoites for structure-guided drug design
title_full The transcriptome of Balamuthia mandrillaris trophozoites for structure-guided drug design
title_fullStr The transcriptome of Balamuthia mandrillaris trophozoites for structure-guided drug design
title_full_unstemmed The transcriptome of Balamuthia mandrillaris trophozoites for structure-guided drug design
title_sort transcriptome of balamuthia mandrillaris trophozoites for structure-guided drug design
publisher Nature Portfolio
publishDate 2021
url https://doaj.org/article/2f6501344d864a2aaccaf8376c641a80
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