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Bodmer BS, Breithaupt A, Heung M, Brunetti JE, Henkel C, Müller-Guhl J, Rodríguez E, Wendt L, Winter SL, Vallbracht M, Müller A, Römer S, Chlanda P, Muñoz-Fontela C, Hoenen T, Escudero-Pérez B. In vivo characterization of the novel ebolavirus Bombali virus suggests a low pathogenic potential for humans. Emerg Microbes Infect 2023; 12:2164216. [PMID: 36580440 PMCID: PMC9858441 DOI: 10.1080/22221751.2022.2164216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Ebolaviruses cause outbreaks of haemorrhagic fever in Central and West Africa. Some members of this genus such as Ebola virus (EBOV) are highly pathogenic, with case fatality rates of up to 90%, whereas others such as Reston virus (RESTV) are apathogenic for humans. Bombali virus (BOMV) is a novel ebolavirus for which complete genome sequences were recently found in free-tailed bats, although no infectious virus could be isolated. Its pathogenic potential for humans is unknown. To address this question, we first determined whether proteins encoded by the available BOMV sequence found in Chaerephon pumilus were functional in in vitro assays. The correction of an apparent sequencing error in the glycoprotein based on these data then allowed us to generate infectious BOMV using reverse genetics and characterize its infection of human cells. Furthermore, we used HLA-A2-transgenic, NOD-scid-IL-2γ receptor-knockout (NSG-A2) mice reconstituted with human haematopoiesis as a model to evaluate the pathogenicity of BOMV in vivo in a human-like immune environment. These data demonstrate that not only does BOMV show a slower growth rate than EBOV in vitro, but it also shows low pathogenicity in humanized mice, comparable to previous studies using RESTV. Taken together, these findings suggest a low pathogenic potential of BOMV for humans.
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Affiliation(s)
- B. S. Bodmer
- Institute for Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Greifswald – Insel Riems, Germany
| | - A. Breithaupt
- Department of Experimental Animal Facilities and Biorisk Management, Friedrich-Loeffler-Institut, Greifswald – Insel Riems, Germany
| | - M. Heung
- Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany
| | - J. E. Brunetti
- Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany
| | - C. Henkel
- Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany
| | - J. Müller-Guhl
- Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany,Leibniz Institute of Virology, Hamburg, Germany
| | - E. Rodríguez
- Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany,German Center for Infection Research (DZIF), Partner Site Hamburg-Luebeck-Borstel, Braunschweig, Germany
| | - L. Wendt
- Institute for Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Greifswald – Insel Riems, Germany
| | - S. L. Winter
- Schaller Research Groups, Department of Infectious Diseases, Virology, Heidelberg University Hospital, Heidelberg, Germany
| | - M. Vallbracht
- Schaller Research Groups, Department of Infectious Diseases, Virology, Heidelberg University Hospital, Heidelberg, Germany
| | - A. Müller
- Institute for Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Greifswald – Insel Riems, Germany
| | - S. Römer
- Institute for Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Greifswald – Insel Riems, Germany
| | - P. Chlanda
- Schaller Research Groups, Department of Infectious Diseases, Virology, Heidelberg University Hospital, Heidelberg, Germany
| | - C. Muñoz-Fontela
- Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany,German Center for Infection Research (DZIF), Partner Site Hamburg-Luebeck-Borstel, Braunschweig, Germany
| | - T. Hoenen
- Institute for Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Greifswald – Insel Riems, Germany, T. Hoenen Institute for Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Südufer 10, Greifswald – Insel Riems, 17493Germany
| | - B. Escudero-Pérez
- Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany,German Center for Infection Research (DZIF), Partner Site Hamburg-Luebeck-Borstel, Braunschweig, Germany
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Bodmer BS, Vallbracht M, Ushakov DS, Wendt L, Chlanda P, Hoenen T. Ebola virus inclusion bodies are liquid organelles whose formation is facilitated by nucleoprotein oligomerization. Emerg Microbes Infect 2023; 12:2223727. [PMID: 37306660 PMCID: PMC10288931 DOI: 10.1080/22221751.2023.2223727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2023] [Revised: 05/16/2023] [Accepted: 06/06/2023] [Indexed: 06/13/2023]
Abstract
Viral RNA synthesis of several non-segmented, negative-sense RNA viruses (NNSVs) takes place in inclusion bodies (IBs) that show properties of liquid organelles, which are formed by liquid-liquid phase separation of scaffold proteins. It is believed that this is driven by intrinsically disordered regions (IDRs) and/or multiple copies of interaction domains, which for NNSVs are usually located in their nucleo - and phosphoproteins. In contrast to other NNSVs, the Ebola virus (EBOV) nucleoprotein NP alone is sufficient to form IBs without the need for a phosphoprotein, and to facilitate the recruitment of other viral proteins into these structures. While it has been proposed that also EBOV IBs are liquid organelles, this has so far not been formally demonstrated. Here we used a combination of live cell microscopy, fluorescence recovery after photobleaching assays, and mutagenesis approaches together with reverse genetics-based generation of recombinant viruses to study the formation of EBOV IBs. Our results demonstrate that EBOV IBs are indeed liquid organelles, and that oligomerization but not IDRs of the EBOV nucleoprotein plays a key role in their formation. Additionally, VP35 (often considered the phosphoprotein-equivalent of EBOV) is not essential for IB formation, but alters their liquid behaviour. These findings define the molecular mechanism for the formation of EBOV IBs, which play a central role in the life cycle of this deadly virus.
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Affiliation(s)
- Bianca S. Bodmer
- Institute for Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Greifswald - Insel Riems, Germany
| | - Melina Vallbracht
- Schaller Research Groups, Department of Infectious Diseases, Virology, Heidelberg University Hospital, Heidelberg, Germany
| | - Dmitry S. Ushakov
- Institute for Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Greifswald - Insel Riems, Germany
| | - Lisa Wendt
- Institute for Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Greifswald - Insel Riems, Germany
| | - Petr Chlanda
- Schaller Research Groups, Department of Infectious Diseases, Virology, Heidelberg University Hospital, Heidelberg, Germany
| | - Thomas Hoenen
- Institute for Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Greifswald - Insel Riems, Germany
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Wendt L, Hornung M, Sami R. Zolpidem in Elderly Patients With Acute Treatment Resistant Catatonia: A Case Report. Hosp Pharm 2023; 58:444-447. [PMID: 37711409 PMCID: PMC10498965 DOI: 10.1177/00185787231161514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/16/2023]
Abstract
Catatonia is defined by the Diagnostic and Statistical Manual of Mental Disorders-fifth Edition (DSM-5) as the presence of 3 or more of the following symptoms: catalepsy, waxy flexibility, stupor, agitation, mutism, negativism, posturing, mannerisms, stereotypies, grimacing, echolalia, and echopraxia. Screening instruments, such as the Bush Francis Catatonia Rating Scale (BFCRS) or the Northoff Catatonia Scale, are utilized to screen and track the severity and course of symptoms. The primary pharmacologic treatment for catatonia is the lorazepam challenge test. Second-line pharmacologic therapies are indicated when patients have an insufficient response to benzodiazepines and electroconvulsive therapy (ECT). In this case report, we report a case of a geriatric patient given high-dose zolpidem as an alternative agent with cardiac contraindications to ECT.
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Affiliation(s)
- Lisa Wendt
- Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | | | - Rayyan Sami
- Rush University Medical Center, Chicago, IL, USA
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Drambarean B, Mastalerz J, Wendt L, Toth-Manikowski S. Pharmacotherapy considerations in pregnant patients on hemodialysis. Hemodial Int 2023. [PMID: 37345253 DOI: 10.1111/hdi.13107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 05/15/2023] [Accepted: 06/03/2023] [Indexed: 06/23/2023]
Abstract
PURPOSE Successful pregnancy rates on dialysis are increasing with the advent of intensive hemodialysis and advances in medical management. SUMMARY Data support the use of intensive hemodialysis in pregnant women with end-stage kidney disease (ESKD). This paper provides an overview of common pharmacotherapeutic changes in management when caring for a pregnant woman receiving intensive hemodialysis. Pregnant patients on peritoneal dialysis were excluded from this analysis due to insufficient data. Topics covered include those related to anemia (iron and erythropoietin stimulating agents), blood pressure agents, monitoring of phosphorus, as well as nutrition and anticoagulation. CONCLUSION When patients on hemodialysis become pregnant, medication adjustments are needed regarding antihypertensives, anemia management, and mineral-bone disease management as many agents require dose adjustment, switching agents due to teratogenicity, or cessation due to fetal complications. There are minimal data in this population; however, successful and healthy infants have been delivered in this patient population with the medication changes discussed.
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Affiliation(s)
- Beatrice Drambarean
- Department of Pharmacy Practice, University of Illinois at Chicago, College of Pharmacy, Chicago, Illinois, USA
| | - Justyna Mastalerz
- Department of Pharmacy Practice, University of Illinois at Chicago, College of Pharmacy, Chicago, Illinois, USA
| | - Lisa Wendt
- Department of Pharmacy, Rush University Medical Center, Chicago, Illinois, USA
| | - Stephanie Toth-Manikowski
- Department of Nephrology, University of Illinois at Chicago, College of Medicine, Chicago, Illinois, USA
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Wendt L, Pickin MJ, Bodmer BS, Reiche S, Fénéant L, Hölper JE, Fuchs W, Groseth A, Hoenen T. N 6-methyladenosine is required for efficient RNA synthesis of Ebola virus and other haemorrhagic fever viruses. Emerg Microbes Infect 2023:2223732. [PMID: 37306620 DOI: 10.1080/22221751.2023.2223732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
N6-methyladenosine (m6A) is one of the most abundant modifications of cellular RNA, where it serves various functions. m6A methylation of many viral RNA species has also been described; however, little is known about the m6A epitranscriptome of haemorrhagic fever-causing viruses like Ebola virus (EBOV). Here, we analysed the importance of the methyltransferase METTL3 for the life cycle of this virus. We found that METTL3 interacts with the EBOV nucleoprotein and the transcriptional activator VP30 to support viral RNA synthesis, and that METTL3 is recruited into EBOV inclusions bodies, where viral RNA synthesis occurs. Analysis of the m6A methylation pattern of EBOV mRNAs showed that they are methylated by METTL3. Further studies revealed that METTL3 interaction with the viral nucleoprotein, as well as its importance for RNA synthesis and protein expression, is also observed for other haemorrhagic fever viruses such as Junín virus (JUNV) and Crimean-Congo haemorrhagic fever virus (CCHFV). The negative effects on viral RNA synthesis due to loss of m6A methylation are independent of innate immune sensing, as METTL3 knockout did not affect type I interferon induction in response to viral RNA synthesis or infection. Our results suggest a novel function for m6A that is conserved among diverse haemorrhagic fever-causing viruses (i.e. EBOV, JUNV and CCHFV), making METTL3 a promising target for broadly-acting antivirals.
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Affiliation(s)
- Lisa Wendt
- Institute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Greifswald - Insel Riems, Germany
| | - Matthew J Pickin
- Institute of Novel and Emerging Infectious Diseases, Friedrich-Loeffler-Institut, Greifswald - Insel Riems, Germany
| | - Bianca S Bodmer
- Institute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Greifswald - Insel Riems, Germany
| | - Sven Reiche
- Department of Experimental Animal Facilities and Biorisk Management, Friedrich-Loeffler-Institut, Greifswald - Insel Riems, Germany
| | - Lucie Fénéant
- Institute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Greifswald - Insel Riems, Germany
| | - Julia E Hölper
- Institute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Greifswald - Insel Riems, Germany
| | - Walter Fuchs
- Institute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Greifswald - Insel Riems, Germany
| | - Allison Groseth
- Institute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Greifswald - Insel Riems, Germany
| | - Thomas Hoenen
- Institute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Greifswald - Insel Riems, Germany
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Hu S, Fujita-Fujiharu Y, Sugita Y, Wendt L, Muramoto Y, Nakano M, Hoenen T, Noda T. Cryoelectron microscopic structure of the nucleoprotein-RNA complex of the European filovirus, Lloviu virus. PNAS Nexus 2023; 2:pgad120. [PMID: 37124400 PMCID: PMC10139700 DOI: 10.1093/pnasnexus/pgad120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 03/17/2023] [Accepted: 03/27/2023] [Indexed: 05/02/2023]
Abstract
Lloviu virus (LLOV) is a novel filovirus detected in Schreiber's bats in Europe. The isolation of the infectious LLOV from bats has raised public health concerns. However, the virological and molecular characteristics of LLOV remain largely unknown. The nucleoprotein (NP) of LLOV encapsidates the viral genomic RNA to form a helical NP-RNA complex, which acts as a scaffold for nucleocapsid formation and de novo viral RNA synthesis. In this study, using single-particle cryoelectron microscopy, we determined two structures of the LLOV NP-RNA helical complex, comprising a full-length and a C-terminally truncated NP. The two helical structures were identical, demonstrating that the N-terminal region determines the helical arrangement of the NP. The LLOV NP-RNA protomers displayed a structure similar to that in the Ebola and Marburg virus, but the spatial arrangements in the helix differed. Structure-based mutational analysis identified amino acids involved in the helical assembly and viral RNA synthesis. These structures advance our understanding of the filovirus nucleocapsid formation and provide a structural basis for the development of antifiloviral therapeutics.
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Affiliation(s)
- Shangfan Hu
- Laboratory of Ultrastructural Virology, Institute for Life and Medical Sciences, Kyoto University, 53 Shogoin Kawahara-cho, Sakyo-ku, Kyoto 606-8507, Japan
- Laboratory of Ultrastructural Virology, Graduate School of Biostudies, Kyoto University, 53 Shogoin Kawahara-cho, Sakyo-ku, Kyoto 606-8507, Japan
- CREST, Japan Science and Technology Agency, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
| | - Yoko Fujita-Fujiharu
- Laboratory of Ultrastructural Virology, Institute for Life and Medical Sciences, Kyoto University, 53 Shogoin Kawahara-cho, Sakyo-ku, Kyoto 606-8507, Japan
- Laboratory of Ultrastructural Virology, Graduate School of Biostudies, Kyoto University, 53 Shogoin Kawahara-cho, Sakyo-ku, Kyoto 606-8507, Japan
- CREST, Japan Science and Technology Agency, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
| | - Yukihiko Sugita
- Laboratory of Ultrastructural Virology, Institute for Life and Medical Sciences, Kyoto University, 53 Shogoin Kawahara-cho, Sakyo-ku, Kyoto 606-8507, Japan
- Laboratory of Ultrastructural Virology, Graduate School of Biostudies, Kyoto University, 53 Shogoin Kawahara-cho, Sakyo-ku, Kyoto 606-8507, Japan
- Hakubi Center for Advanced Research, Kyoto University, 53 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan
| | - Lisa Wendt
- Laboratory for Integrative Cell and Infection Biology, Institute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Insel Riems, Greifswald 17493, Germany
| | - Yukiko Muramoto
- Laboratory of Ultrastructural Virology, Institute for Life and Medical Sciences, Kyoto University, 53 Shogoin Kawahara-cho, Sakyo-ku, Kyoto 606-8507, Japan
- Laboratory of Ultrastructural Virology, Graduate School of Biostudies, Kyoto University, 53 Shogoin Kawahara-cho, Sakyo-ku, Kyoto 606-8507, Japan
- CREST, Japan Science and Technology Agency, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
| | - Masahiro Nakano
- Laboratory of Ultrastructural Virology, Institute for Life and Medical Sciences, Kyoto University, 53 Shogoin Kawahara-cho, Sakyo-ku, Kyoto 606-8507, Japan
- Laboratory of Ultrastructural Virology, Graduate School of Biostudies, Kyoto University, 53 Shogoin Kawahara-cho, Sakyo-ku, Kyoto 606-8507, Japan
- CREST, Japan Science and Technology Agency, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
| | - Thomas Hoenen
- Laboratory for Integrative Cell and Infection Biology, Institute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Insel Riems, Greifswald 17493, Germany
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Bohn P, Waßmann I, Wendt L, Leske A, Hoenen T, Tews BA, Groseth A. A dsRNA-binding mutant reveals only a minor role of exonuclease activity in interferon antagonism by the arenavirus nucleoprotein. PLoS Pathog 2023; 19:e1011049. [PMID: 36603036 PMCID: PMC9815661 DOI: 10.1371/journal.ppat.1011049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Accepted: 12/07/2022] [Indexed: 01/06/2023] Open
Abstract
The arenavirus nucleoprotein (NP) plays an important role in the virus' ability to block interferon (IFN) production, and its exonuclease function appears to contribute to this activity. However, efforts to analyze this contribution are complicated by the functional overlap between the exonuclease active site and a neighboring region involved in IKKε-binding and subsequent inhibition of IRF3 activation, which also plays an important role in IFN production. To circumvent this issue, we mutated a residue located away from the active site that is involved in binding of the dsRNA substrate being targeted for exonuclease digestion, i.e. H426A. We found that expression of Tacaribe virus (TCRV) NP containing this RNA-binding H426A mutation was still able to efficiently block IFN-β promoter activity in response to Sendai virus infection, despite being strongly impaired in its exonuclease activity. This was in contrast to a conventional exonuclease active site mutant (E388A), which was impaired with respect to both exonuclease activity and IFN antagonism. Importantly, growth of a recombinant virus encoding the RNA-binding mutation (rTCRV-H426A) was similar to wild-type in IFN-deficient cells, unlike the active site mutant (rTCRV-E388A), which was already markedly impaired in these cells. Further, in IFN-competent cells, the TCRV-H426A RNA-binding mutant showed more robust growth and delayed IFN-β mRNA upregulation compared to the TCRV-E388A active site mutant. Taken together, this novel mutational approach, which allows us to now dissect the different contributions of the NP exonuclease activity and IKKε-binding/IRF3 inhibition to IFN antagonism, clearly suggests that conventional exonuclease mutants targeting the active site overestimate the contribution of the exonuclease function, and that rather other IFN antagonistic functions of NP play the dominant role in IFN-antagonism.
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Affiliation(s)
- Patrick Bohn
- Institute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Greifswald-Insel Riems, Germany
| | - Irke Waßmann
- Institute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Greifswald-Insel Riems, Germany
| | - Lisa Wendt
- Institute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Greifswald-Insel Riems, Germany
| | - Anne Leske
- Institute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Greifswald-Insel Riems, Germany
| | - Thomas Hoenen
- Institute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Greifswald-Insel Riems, Germany
| | - Birke A. Tews
- Institute of Infectology, Friedrich-Loeffler-Institut, Greifswald–Insel Riems, Germany
| | - Allison Groseth
- Institute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Greifswald-Insel Riems, Germany
- * E-mail:
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Sanchez S, Raghuram A, Fakih R, Wendt L, Bathla G, Hickerson M, Ortega-Gutierrez S, Leira E, Samaniego EA. 3D Enhancement Color Maps in the Characterization of Intracranial Atherosclerotic Plaques. AJNR Am J Neuroradiol 2022; 43:1252-1258. [PMID: 35953278 PMCID: PMC9451620 DOI: 10.3174/ajnr.a7605] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Accepted: 06/24/2022] [Indexed: 01/26/2023]
Abstract
BACKGROUND AND PURPOSE High-resolution MR imaging allows the identification of culprit symptomatic plaques after the administration of gadolinium. Current high-resolution MR imaging methods are limited by 2D multiplanar views and manual sampling of ROIs. We analyzed a new 3D method to objectively quantify gadolinium plaque enhancement. MATERIALS AND METHODS Patients with stroke due to intracranial atherosclerotic disease underwent 7T high-resolution MR imaging. 3D segmentations of the plaque and its parent vessel were generated. Signal intensity probes were automatically extended from the lumen into the plaque and the vessel wall to generate 3D enhancement color maps. Plaque gadolinium (Gd) uptake was quantified from 3D color maps as gadolinium uptake = (µPlaque T1 + Gd -µPlaque T1/SDPlaque T1). Additional metrics of enhancement such as enhancement ratio, variance, and plaque-versus-parent vessel enhancement were also calculated. Conventional 2D measures of enhancement were collected for comparison. RESULTS Thirty-six culprit and 44 nonculprit plaques from 36 patients were analyzed. Culprit plaques had higher gadolinium uptake than nonculprit plaques (P < .001). Gadolinium uptake was the most accurate metric for identifying culprit plaques (OR, 3.9; 95% CI 2.1-8.3). Gadolinium uptake was more sensitive (86% versus 70%) and specific (71% versus 68%) in identifying culprit plaques than conventional 2D measurements. A multivariate model, including gadolinium uptake and plaque burden, identified culprit plaques with an 83% sensitivity and 86% specificity. CONCLUSIONS The new 3D color map method of plaque-enhancement analysis is more accurate for identifying culprit plaques than conventional 2D methods. This new method generates a new set of metrics that could potentially be used to assess disease progression.
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Affiliation(s)
- S Sanchez
- From the Department of Neurology (S.S., A.R., R.F., M.H., S.O.-G., E.L., E.A.S.)
| | - A Raghuram
- From the Department of Neurology (S.S., A.R., R.F., M.H., S.O.-G., E.L., E.A.S.)
| | - R Fakih
- From the Department of Neurology (S.S., A.R., R.F., M.H., S.O.-G., E.L., E.A.S.)
| | - L Wendt
- Institute for Clinical and Translational Science (L.W.), University of Iowa, Iowa City, Iowa
| | - G Bathla
- Radiology (G.B., S.O.-G., E.A.S.)
| | - M Hickerson
- From the Department of Neurology (S.S., A.R., R.F., M.H., S.O.-G., E.L., E.A.S.)
| | - S Ortega-Gutierrez
- From the Department of Neurology (S.S., A.R., R.F., M.H., S.O.-G., E.L., E.A.S.)
- Radiology (G.B., S.O.-G., E.A.S.)
- Neurosurgery (S.O.-G., E.A.S.), University of Iowa Hospitals and Clinics, Iowa City, Iowa
| | - E Leira
- From the Department of Neurology (S.S., A.R., R.F., M.H., S.O.-G., E.L., E.A.S.)
| | - E A Samaniego
- From the Department of Neurology (S.S., A.R., R.F., M.H., S.O.-G., E.L., E.A.S.)
- Radiology (G.B., S.O.-G., E.A.S.)
- Neurosurgery (S.O.-G., E.A.S.), University of Iowa Hospitals and Clinics, Iowa City, Iowa
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Hwang M, Wilson K, Wendt L, Pohlman J, Densmore E, Kaeppler C, Van Arendonk K, Yale S. The Great Gut Mimicker: A case report of MIS-C and appendicitis clinical presentation overlap in a teenage patient. BMC Pediatr 2021; 21:258. [PMID: 34074244 PMCID: PMC8167300 DOI: 10.1186/s12887-021-02724-x] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Accepted: 05/19/2021] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND Abdominal pain and other gastrointestinal symptoms are common presenting features of multisystem inflammatory syndrome in children (MIS-C) and can overlap with infectious or inflammatory abdominal conditions, making accurate diagnosis challenging. CASE PRESENTATION We describe the case of a 16-year-old female who presented with clinical symptoms suggestive of appendicitis and an abdominal computed tomography (CT) that revealed features concerning for appendicitis. After laparoscopic appendectomy, histopathology of the appendix demonstrated only mild serosal inflammation and was not consistent with acute appendicitis. Her overall clinical presentation was felt to be consistent with MIS-C and she subsequently improved with immunomodulatory and steroid treatment. CONCLUSIONS We note that MIS-C can mimic acute appendicitis. This case highlights MIS-C as a cause of abdominal imaging with features concerning for appendicitis, and MIS-C should be considered in the differential for a patient with appendicitis-like symptoms and a positive COVID-19 IgG. Lab criteria, specifically low-normal white blood cell count and thrombocytopenia, appears to be of high relevance in differing MIS-C from acute appendicitis, even when appendix radiologically is dilated.
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Affiliation(s)
- Michelle Hwang
- Department of Pediatrics, Medical College of Wisconsin, Children's Corporate Center Suite 560, 999 North 92nd Street, Wisconsin, 53226, Milwaukee, USA
| | - Kelsey Wilson
- Department of Pediatrics, Medical College of Wisconsin, Children's Corporate Center Suite 560, 999 North 92nd Street, Wisconsin, 53226, Milwaukee, USA
| | - Lisa Wendt
- Department of Pediatrics, Medical College of Wisconsin, Children's Corporate Center Suite 560, 999 North 92nd Street, Wisconsin, 53226, Milwaukee, USA
| | - Joshua Pohlman
- Department of Pediatrics, Medical College of Wisconsin, Children's Corporate Center Suite 560, 999 North 92nd Street, Wisconsin, 53226, Milwaukee, USA
| | - Emily Densmore
- Department of Pediatrics, Medical College of Wisconsin, Children's Corporate Center Suite 560, 999 North 92nd Street, Wisconsin, 53226, Milwaukee, USA
| | - Caitlin Kaeppler
- Department of Pediatrics, Medical College of Wisconsin, Children's Corporate Center Suite 560, 999 North 92nd Street, Wisconsin, 53226, Milwaukee, USA
| | - Kyle Van Arendonk
- Department of Pediatrics, Medical College of Wisconsin, Children's Corporate Center Suite 560, 999 North 92nd Street, Wisconsin, 53226, Milwaukee, USA
| | - Sarah Yale
- Department of Pediatrics, Medical College of Wisconsin, Children's Corporate Center Suite 560, 999 North 92nd Street, Wisconsin, 53226, Milwaukee, USA.
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Wittstein K, Cordsmeier A, Lambert C, Wendt L, Sir EB, Weber J, Wurzler N, Petrini LE, Stadler M. Identification of Rosellinia species as producers of cyclodepsipeptide PF1022 A and resurrection of the genus Dematophora as inferred from polythetic taxonomy. Stud Mycol 2020; 96:1-16. [PMID: 32165986 PMCID: PMC7056724 DOI: 10.1016/j.simyco.2020.01.001] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Rosellinia (Xylariaceae) is a large, cosmopolitan genus comprising over 130 species that have been defined based mainly on the morphology of their sexual morphs. The genus comprises both lignicolous and saprotrophic species that are frequently isolated as endophytes from healthy host plants, and important plant pathogens. In order to evaluate the utility of molecular phylogeny and secondary metabolite profiling to achieve a better basis for their classification, a set of strains was selected for a multi-locus phylogeny inferred from a combination of the sequences of the internal transcribed spacer region (ITS), the large subunit (LSU) of the nuclear rDNA, beta-tubulin (TUB2) and the second largest subunit of the RNA polymerase II (RPB2). Concurrently, various strains were surveyed for production of secondary metabolites. Metabolite profiling relied on methods with high performance liquid chromatography with diode array and mass spectrometric detection (HPLC-DAD/MS) as well as preparative isolation of the major components after re-fermentation followed by structure elucidation using nuclear magnetic resonance (NMR) spectroscopy and high resolution mass spectrometry (HR-MS). Two new and nine known isopimarane diterpenoids were identified during our mycochemical studies of two selected Dematophora strains and the metabolites were tested for biological activity. In addition, the nematicidal cyclodepsipeptide PF1022 A was purified and identified from a culture of Rosellinia corticium, which is the first time that this endophyte-derived drug precursor has been identified unambiguously from an ascospore-derived isolate of a Rosellinia species. While the results of this first HPLC profiling were largely inconclusive regarding the utility of secondary metabolites as genus-specific chemotaxonomic markers, the phylogeny clearly showed that species featuring a dematophora-like asexual morph were included in a well-defined clade, for which the genus Dematophora is resurrected. Dematophora now comprises all previously known important plant pathogens in the genus such as D. arcuata, D. bunodes, D. necatrix and D. pepo, while Rosellinia s. str. comprises those species that are known to have a geniculosporium-like or nodulisporium-like asexual morph, or where the asexual morph remains unknown. The extensive morphological studies of L.E. Petrini served as a basis to transfer several further species from Rosellinia to Dematophora, based on the morphology of their asexual morphs. However, most species of Rosellinia and allies still need to be recollected in fresh state, cultured, and studied for their morphology and their phylogenetic affinities before the infrageneric relationships can be clarified.
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Key Words
- Dematophora
- Dematophora acutispora (Theiss.) C. Lambert, K. Wittstein & M. Stadler
- Dematophora arcuata (Petch) C. Lambert, K. Wittstein & M. Stadler
- Dematophora asperata (Massee ex Wakef.) Lambert, K. Wittstein & M. Stadler
- Dematophora beccariana (Ces.) C. Lambert, K. Wittstein & M, Stadler
- Dematophora boedijnii (L.E. Petrini) C. Lambert, K. Wittstein & M. Stadler
- Dematophora bothrina (Berk. & Broome) C. Lambert, K. Wittstein & M. Stadler
- Dematophora bunodes (Berk. & Broome) C. Lambert, K. Wittstein & M. Stadler
- Dematophora buxi (Fabre) C. Lambert, K. Wittstein & M. Stadler
- Dematophora compacta (Takemoto) C. Lambert, K. Wittstein & M. Stadler
- Dematophora francisiae (L.E. Petrini) C. Lambert, K. Wittstein & M. Stadler
- Dematophora freycinetiae (L.E. Petrini) C. Lambert, K. Wittstein & M. Stadler
- Dematophora gigantea (Ellis & Everh.) C. Lambert, K. Wittstein & M. Stadler
- Dematophora grantii (L.E. Petrini) C. Lambert, K. Wittstein & M. Stadler
- Dematophora hsiehiae (L.E. Petrini) C. Lambert, K. Wittstein & M. Stadler
- Dematophora hughesii (L.E. Petrini) C. Lambert, K. Wittstein & M. Stadler
- Dematophora javaensis (L.E. Petrini) C. Lambert, K. Wittstein & M. Stadler
- Dematophora macdonaldii (Bres.) C. Lambert, K. Wittstein & M. Stadler
- Dematophora obregonii (L.E. Petrini) C. Lambert, K. Wittstein & M. Stadler
- Dematophora obtusiostiolata (L.E. Petrini) C. Lambert, K. Wittstein & M. Stadler
- Dematophora paraguayensis (Starbäck) C. Lambert, K. Wittstein & M. Stadler
- Dematophora pepo (Pat.) C. Lambert, K. Wittstein & M. Stadler
- Dematophora puiggarii (Pat.) C. Lambert, K. Wittstein & M. Stadler
- Dematophora pyramidalis (Lar.N. Vassiljeva) C. Lambert, K. Wittstein & M. Stadler
- Dematophora samuelsii (L.E. Petrini) C. Lambert, K. Wittstein & M. Stadler
- Dematophora siggersii (L.E. Petrini) C. Lambert, K. Wittstein & M. Stadler
- Genus resurrection
- Isopimarane diterpenoids
- PF1022A
- Polythetic taxonomy
- Rosellinia
- Xylariaceae
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Affiliation(s)
- K Wittstein
- Helmholtz-Zentrum für Infektionsforschung GmbH, Department Microbial Drugs, Inhoffenstrasse 7, Braunschweig, 38124, Germany.,German Centre for Infection Research (DZIF), Partner site Hannover-Braunschweig, Braunschweig, 38124, Germany
| | - A Cordsmeier
- Helmholtz-Zentrum für Infektionsforschung GmbH, Department Microbial Drugs, Inhoffenstrasse 7, Braunschweig, 38124, Germany.,University Hospital Erlangen, Institute of Microbiology - Clinical Microbiology, Immunology and Hygiene, Wasserturmstraße 3/5, Erlangen, 91054, Germany
| | - C Lambert
- Helmholtz-Zentrum für Infektionsforschung GmbH, Department Microbial Drugs, Inhoffenstrasse 7, Braunschweig, 38124, Germany.,German Centre for Infection Research (DZIF), Partner site Hannover-Braunschweig, Braunschweig, 38124, Germany
| | - L Wendt
- Helmholtz-Zentrum für Infektionsforschung GmbH, Department Microbial Drugs, Inhoffenstrasse 7, Braunschweig, 38124, Germany.,German Centre for Infection Research (DZIF), Partner site Hannover-Braunschweig, Braunschweig, 38124, Germany
| | - E B Sir
- Instituto de Bioprospección y Fisiología Vegetal-INBIOFIV (CONICET-UNT), San Lorenzo 1469, San Miguel de Tucumán, Tucumán, 4000, Argentina
| | - J Weber
- Helmholtz-Zentrum für Infektionsforschung GmbH, Department Microbial Drugs, Inhoffenstrasse 7, Braunschweig, 38124, Germany.,German Centre for Infection Research (DZIF), Partner site Hannover-Braunschweig, Braunschweig, 38124, Germany
| | - N Wurzler
- Helmholtz-Zentrum für Infektionsforschung GmbH, Department Microbial Drugs, Inhoffenstrasse 7, Braunschweig, 38124, Germany.,German Centre for Infection Research (DZIF), Partner site Hannover-Braunschweig, Braunschweig, 38124, Germany
| | - L E Petrini
- Via al Perato 15c, Breganzona, CH-6932, Switzerland
| | - M Stadler
- Helmholtz-Zentrum für Infektionsforschung GmbH, Department Microbial Drugs, Inhoffenstrasse 7, Braunschweig, 38124, Germany.,German Centre for Infection Research (DZIF), Partner site Hannover-Braunschweig, Braunschweig, 38124, Germany
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Wendt L, Bostedt L, Hoenen T, Groseth A. High-throughput screening for negative-stranded hemorrhagic fever viruses using reverse genetics. Antiviral Res 2019; 170:104569. [PMID: 31356830 DOI: 10.1016/j.antiviral.2019.104569] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2019] [Revised: 06/28/2019] [Accepted: 07/25/2019] [Indexed: 02/06/2023]
Abstract
Viral hemorrhagic fevers (VHFs) cause thousands of fatalities every year, but the treatment options for their management remain very limited. In particular, the development of therapeutic interventions is restricted by the lack of commercial viability of drugs targeting individual VHF agents. This makes approaches like drug repurposing and/or the identification of broad range therapies (i.e. those directed at host responses or common proviral factors) highly attractive. However, the identification of candidates for such antiviral repurposing or of host factors/pathways important for the virus life cycle is reliant on high-throughput screening (HTS). Recently, such screening work has been increasingly facilitated by the availability of reverse genetics-based approaches, including tools such as full-length clone (FLC) systems to generate reporter-expressing viruses or various life cycle modelling (LCM) systems, many of which have been developed and/or greatly improved during the last years. In particular, since LCM systems are capable of modelling specific steps in the life cycle, they are a valuable tool for both targeted screening (i.e. for inhibitors of a specific pathway) and mechanism of action studies. This review seeks to summarize the currently available reverse genetics systems for negative-sense VHF causing viruses (i.e. arenaviruses, bunyaviruses and filoviruses), and to highlight the recent advancements made in applying these systems for HTS to identify either antivirals or new virus-host interactions that might hold promise for the development of future treatments for the infections caused by these deadly but neglected virus groups.
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Affiliation(s)
- Lisa Wendt
- Institute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Greifswald, Insel Riems, Germany
| | - Linus Bostedt
- Junior Research Group - Arenavirus Biology, Friedrich-Loeffler-Institut, Greifswald, Insel Riems, Germany
| | - Thomas Hoenen
- Institute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Greifswald, Insel Riems, Germany.
| | - Allison Groseth
- Junior Research Group - Arenavirus Biology, Friedrich-Loeffler-Institut, Greifswald, Insel Riems, Germany.
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12
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Kämper L, Zierke L, Schmidt ML, Müller A, Wendt L, Brandt J, Hartmann E, Braun S, Holzerland J, Groseth A, Hoenen T. Assessment of the function and intergenus-compatibility of Ebola and Lloviu virus proteins. J Gen Virol 2019; 100:760-772. [DOI: 10.1099/jgv.0.001261] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Affiliation(s)
- Lennart Kämper
- 1 Institute for Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Greifswald – Insel Riems, Germany
| | - Lukas Zierke
- 1 Institute for Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Greifswald – Insel Riems, Germany
| | - Marie Luisa Schmidt
- 1 Institute for Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Greifswald – Insel Riems, Germany
| | - Andreas Müller
- 1 Institute for Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Greifswald – Insel Riems, Germany
| | - Lisa Wendt
- 1 Institute for Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Greifswald – Insel Riems, Germany
| | - Janine Brandt
- 1 Institute for Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Greifswald – Insel Riems, Germany
| | - Eric Hartmann
- 1 Institute for Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Greifswald – Insel Riems, Germany
| | - Stefanie Braun
- 1 Institute for Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Greifswald – Insel Riems, Germany
| | - Julia Holzerland
- 2 Junior Research Group Arenavirus Biology, Friedrich-Loeffler-Institut, Greifswald – Insel Riems, Germany
| | - Allison Groseth
- 2 Junior Research Group Arenavirus Biology, Friedrich-Loeffler-Institut, Greifswald – Insel Riems, Germany
| | - Thomas Hoenen
- 1 Institute for Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Greifswald – Insel Riems, Germany
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See Hoe LE, Foster SR, Wendt L, Patel HH, Headrick JP, Peart JN. Regulation of the β-Adrenergic Receptor Signaling Pathway in Sustained Ligand-Activated Preconditioning. J Pharmacol Exp Ther 2019; 369:37-46. [DOI: 10.1124/jpet.118.251660] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Accepted: 01/10/2019] [Indexed: 12/12/2022] Open
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Abstract
The matrix protein VP40 of the highly pathogenic Ebola virus (EBOV), a member of the filovirus family, is the most abundant protein in EBOV virions. During the viral life cycle it mediates assembly and budding from the host cell, and is responsible for the characteristic filamentous shape of EBOV particles. In addition to this classical function as a matrix protein, VP40 was also shown to have a regulatory function in viral transcription. To enable these distinct functions, VP40 can adopt different oligomeric states, in particular, dimers, hexamers and ring-like octameric RNA-binding structures. This review describes the properties and functions of the EBOV matrix protein VP40 and how these different conformations of VP40 contribute to its diverse functions.
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Affiliation(s)
- Janine Brandt
- Institute for Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, 17493 Greifswald – Insel Riems, Germany
| | - Lisa Wendt
- Institute for Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, 17493 Greifswald – Insel Riems, Germany
| | - Thomas Hoenen
- Institute for Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, 17493 Greifswald – Insel Riems, Germany
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15
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Martin S, Chiramel AI, Schmidt ML, Chen YC, Whitt N, Watt A, Dunham EC, Shifflett K, Traeger S, Leske A, Buehler E, Martellaro C, Brandt J, Wendt L, Müller A, Peitsch S, Best SM, Stech J, Finke S, Römer-Oberdörfer A, Groseth A, Feldmann H, Hoenen T. A genome-wide siRNA screen identifies a druggable host pathway essential for the Ebola virus life cycle. Genome Med 2018; 10:58. [PMID: 30081931 PMCID: PMC6090742 DOI: 10.1186/s13073-018-0570-1] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Accepted: 07/13/2018] [Indexed: 01/01/2023] Open
Abstract
Background The 2014–2016 Ebola virus (EBOV) outbreak in West Africa highlighted the need for improved therapeutic options against this virus. Approaches targeting host factors/pathways essential for the virus are advantageous because they can potentially target a wide range of viruses, including newly emerging ones and because the development of resistance is less likely than when targeting the virus directly. However, systematic approaches for screening host factors important for EBOV have been hampered by the necessity to work with this virus at biosafety level 4 (BSL4). Methods In order to identify host factors involved in the EBOV life cycle, we performed a genome-wide siRNA screen comprising 64,755 individual siRNAs against 21,566 human genes to assess their activity in EBOV genome replication and transcription. As a screening platform, we used reverse genetics-based life cycle modelling systems that recapitulate these processes without the need for a BSL4 laboratory. Results Among others, we identified the de novo pyrimidine synthesis pathway as an essential host pathway for EBOV genome replication and transcription, and confirmed this using infectious EBOV under BSL4 conditions. An FDA-approved drug targeting this pathway showed antiviral activity against infectious EBOV, as well as other non-segmented negative-sense RNA viruses. Conclusions This study provides a minable data set for every human gene regarding its role in EBOV genome replication and transcription, shows that an FDA-approved drug targeting one of the identified pathways is highly efficacious in vitro, and demonstrates the power of life cycle modelling systems for conducting genome-wide host factor screens for BSL4 viruses. Electronic supplementary material The online version of this article (10.1186/s13073-018-0570-1) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Scott Martin
- Division of Preclinical Innovation, National Center for Advancing Translational Sciences, National Institutes of Health, 31 Center Drive, Bethesda, MD, 20892, USA.,Present address: Department of Discovery Oncology, Genentech, 1 DNA Way, South San Francisco, CA, 94080, USA
| | - Abhilash I Chiramel
- Laboratory of Virology, Division of Intramural Research, National Institute for Allergy and Infectious Diseases, National Institutes of Health, 903 S 4th St., Hamilton, MT, 59840, USA
| | - Marie Luisa Schmidt
- Institute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Südufer 10, 17493, Greifswald, Insel Riems, Germany
| | - Yu-Chi Chen
- Division of Preclinical Innovation, National Center for Advancing Translational Sciences, National Institutes of Health, 31 Center Drive, Bethesda, MD, 20892, USA
| | - Nadia Whitt
- Division of Preclinical Innovation, National Center for Advancing Translational Sciences, National Institutes of Health, 31 Center Drive, Bethesda, MD, 20892, USA
| | - Ari Watt
- Laboratory of Virology, Division of Intramural Research, National Institute for Allergy and Infectious Diseases, National Institutes of Health, 903 S 4th St., Hamilton, MT, 59840, USA
| | - Eric C Dunham
- Laboratory of Virology, Division of Intramural Research, National Institute for Allergy and Infectious Diseases, National Institutes of Health, 903 S 4th St., Hamilton, MT, 59840, USA
| | - Kyle Shifflett
- Laboratory of Virology, Division of Intramural Research, National Institute for Allergy and Infectious Diseases, National Institutes of Health, 903 S 4th St., Hamilton, MT, 59840, USA
| | - Shelby Traeger
- Laboratory of Virology, Division of Intramural Research, National Institute for Allergy and Infectious Diseases, National Institutes of Health, 903 S 4th St., Hamilton, MT, 59840, USA
| | - Anne Leske
- Junior Research Group Arenavirus Biology, Friedrich-Loeffler-Institut, Südufer 10, 17493, Greifswald, Insel Riems, Germany
| | - Eugen Buehler
- Division of Preclinical Innovation, National Center for Advancing Translational Sciences, National Institutes of Health, 31 Center Drive, Bethesda, MD, 20892, USA
| | - Cynthia Martellaro
- Laboratory of Virology, Division of Intramural Research, National Institute for Allergy and Infectious Diseases, National Institutes of Health, 903 S 4th St., Hamilton, MT, 59840, USA
| | - Janine Brandt
- Institute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Südufer 10, 17493, Greifswald, Insel Riems, Germany
| | - Lisa Wendt
- Institute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Südufer 10, 17493, Greifswald, Insel Riems, Germany
| | - Andreas Müller
- Institute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Südufer 10, 17493, Greifswald, Insel Riems, Germany
| | - Stephanie Peitsch
- Institute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Südufer 10, 17493, Greifswald, Insel Riems, Germany
| | - Sonja M Best
- Laboratory of Virology, Division of Intramural Research, National Institute for Allergy and Infectious Diseases, National Institutes of Health, 903 S 4th St., Hamilton, MT, 59840, USA
| | - Jürgen Stech
- Institute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Südufer 10, 17493, Greifswald, Insel Riems, Germany
| | - Stefan Finke
- Institute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Südufer 10, 17493, Greifswald, Insel Riems, Germany
| | - Angela Römer-Oberdörfer
- Institute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Südufer 10, 17493, Greifswald, Insel Riems, Germany
| | - Allison Groseth
- Laboratory of Virology, Division of Intramural Research, National Institute for Allergy and Infectious Diseases, National Institutes of Health, 903 S 4th St., Hamilton, MT, 59840, USA.,Junior Research Group Arenavirus Biology, Friedrich-Loeffler-Institut, Südufer 10, 17493, Greifswald, Insel Riems, Germany
| | - Heinz Feldmann
- Laboratory of Virology, Division of Intramural Research, National Institute for Allergy and Infectious Diseases, National Institutes of Health, 903 S 4th St., Hamilton, MT, 59840, USA
| | - Thomas Hoenen
- Laboratory of Virology, Division of Intramural Research, National Institute for Allergy and Infectious Diseases, National Institutes of Health, 903 S 4th St., Hamilton, MT, 59840, USA. .,Institute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Südufer 10, 17493, Greifswald, Insel Riems, Germany.
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16
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Wendt L, Kämper L, Schmidt ML, Mettenleiter TC, Hoenen T. Analysis of a Putative Late Domain Using an Ebola Virus Transcription and Replication-Competent Virus-Like Particle System. J Infect Dis 2018; 218:S355-S359. [DOI: 10.1093/infdis/jiy247] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Lisa Wendt
- Institute for Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Greifswald-Insel Riems, Germany
| | - Lennart Kämper
- Institute for Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Greifswald-Insel Riems, Germany
| | - Marie Luisa Schmidt
- Institute for Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Greifswald-Insel Riems, Germany
| | - Thomas C Mettenleiter
- Institute for Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Greifswald-Insel Riems, Germany
| | - Thomas Hoenen
- Institute for Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Greifswald-Insel Riems, Germany
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17
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Brückner I, Kirchner K, Müller Y, Schiwy S, Klaer K, Dolny R, Wendt L, Könemann S, Pinnekamp J, Hollert H, Rosenbaum MA. Status quo report on wastewater treatment plant, receiving water's biocoenosis and quality as basis for evaluation of large-scale ozonation process. Water Sci Technol 2018; 77:337-345. [PMID: 29377818 DOI: 10.2166/wst.2017.548] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
The project DemO3AC (demonstration of large-scale wastewater ozonation at the Aachen-Soers wastewater treatment plant, Germany) of the Eifel-Rur Waterboard contains the construction of a large-scale ozonation plant for advanced treatment of the entire 25 million m³/yr of wastewater passing through its largest wastewater treatment plant (WWTP). In dry periods, up to 70% of the receiving water consists of treated wastewater. Thus, it is expected that effects of ozonation on downstream water biocoenosis will become observable. Extensive monitoring of receiving water and the WWTP shows a severe pollution with micropollutants (already prior to WWTP inlet). (Eco-)Toxicological investigations showed increased toxicity at the inlet of the WWTP for all assays. However, endocrine-disrupting potential was also present at other sampling points at the WWTP and in the river and could not be eliminated sufficiently by the WWTP. Total cell counts at the WWTP are slightly below average. Investigations of antibiotic resistances show no increase after the WWTP outlet in the river. However, cells carrying antibiotic-resistant genes seem to be more stress resistant in general. Comparing investigations after implementation of ozonation should lead to an approximation of the correlation between micropollutants and water quality/biocoenosis and the effects that ozonation has on this matter.
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Affiliation(s)
- I Brückner
- Waterboard Eifel-Rur, Eisenbahnstr. 5, Dueren 52353, Germany E-mail:
| | - K Kirchner
- Institute of Applied Microbiology, RWTH Aachen University, Worringerweg 1, Aachen 52074, Germany
| | - Y Müller
- Institute for Environmental Research, RWTH Aachen University, Worringerweg 1, Aachen 52074, Germany
| | - S Schiwy
- Institute for Environmental Research, RWTH Aachen University, Worringerweg 1, Aachen 52074, Germany
| | - K Klaer
- Institute of Environmental Engineering, RWTH Aachen University, Mies-van-der-Rohe-Str. 1, Aachen 52074, Germany
| | - R Dolny
- Institute of Environmental Engineering, RWTH Aachen University, Mies-van-der-Rohe-Str. 1, Aachen 52074, Germany
| | - L Wendt
- Institute of Applied Microbiology, RWTH Aachen University, Worringerweg 1, Aachen 52074, Germany
| | - S Könemann
- Institute for Environmental Research, RWTH Aachen University, Worringerweg 1, Aachen 52074, Germany
| | - J Pinnekamp
- Institute of Environmental Engineering, RWTH Aachen University, Mies-van-der-Rohe-Str. 1, Aachen 52074, Germany
| | - H Hollert
- Institute for Environmental Research, RWTH Aachen University, Worringerweg 1, Aachen 52074, Germany
| | - M A Rosenbaum
- Leibniz Institute for Natural Product Research and Infection Biology, Hans-Knöll-Institute, Adolf-Reichwein-Str. 23, Jena 07745, Germany
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Albring A, Wendt L, Benson S, Nissen S, Yavuz Z, Engler H, Witzke O, Schedlowski M. Preserving Learned Immunosuppressive Placebo Response: Perspectives for Clinical Application. Clin Pharmacol Ther 2014; 96:247-55. [DOI: 10.1038/clpt.2014.75] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2013] [Accepted: 03/27/2014] [Indexed: 12/13/2022]
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Abstract
The kinetics and the temperature dependence of potassium loss from Escherichia coli cells treated with colicin K have been examined. At 37 C, after a single lethal hit, essentially all of the intracellular potassium is lost within the first few minutes of treatment. The initial rate of loss is linearly related to colicin concentration up to a multiplicity of 30. As the temperature is decreased over the range from 37 to 1 C, an increasing delay is seen in the initiation of potassium loss after colicin adsorption. This delay can be overcome by increasing colicin multiplicity and probably reflects an alteration of the cell membrane at these temperatures. A comparison of this effect with an apparently related effect of temperature on the action of irehdiamine A indicates that the delay may represent the inhibition of a transmission process occurring in the membrane.
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Affiliation(s)
- L Wendt
- Department of Biology, Washington University, St. Louis, Missouri 63130
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20
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Schäfer-Graf U, Wendt L, Gaber B, Kilavuz Ö, Abou-Dakn M, Vetter K. Lässt sich die Anzahl wiederholter Ultraschalluntersuchungen bei GDM limitieren ohne eine fetale Makrosomie übersehen? DIABETOL STOFFWECHS 2009. [DOI: 10.1055/s-0029-1221914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Schäfer-Graf U, Wendt L, Gaber B, Kilavuz O, Abou-Dakn M, Vetter K. Lässt sich die Anzahl wiederholter Ultraschalluntersuchungen bei GDM limitieren ohne eine fetale Makrosomie zu übersehen? Z Geburtshilfe Neonatol 2009. [DOI: 10.1055/s-0029-1222971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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22
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Meler J, Wendt L. Pharmaceutical interaction of lidocaine hydrochloride and sodium carboxymethylcellulose in "hydrocortisonum" suspension. Pharmazie 1990; 45:692-3. [PMID: 2284319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- J Meler
- Department of Applied Pharmacy, Medical Academy, Wroclaw, Poland
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Meler J, Wendt L, Krutul H. Conservation of two-phase system stabilized with linseed mucilage. Pharmazie 1987; 42:700-1. [PMID: 3438327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- J Meler
- Department of Applied Pharmacy, Medical Academy, Wrocław, Poland
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Varimo P, Similä S, Wendt L, Kolvisto M. Frequency of breast-feeding and hyperbilirubinemia. Clin Pediatr (Phila) 1986; 25:112. [PMID: 3943257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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25
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Pluta J, Figura B, Lorenz K, Wendt L. Investigations of content of heavy metals in chosen dosage forms of drugs of vegetal origin. Pharmazie 1984; 39:63. [PMID: 6718471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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26
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Wendt L, Similä S, Kouvalainen K. [Nonketone hyperglycinemia]. Pediatriia 1981:36-9. [PMID: 7279501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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Wendt L, Wendt T, Wendt A. Protein transport and protein storage in etiology and pathogenesis of arteriosclerosis. Z Ernahrungswiss 1981; 20:1-43. [PMID: 6454307 DOI: 10.1007/bf02027956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Abstract
Colicin E1 blocks proline accumulation by membrane vesicles prepared from wild-type sensitive Escherichia coli. Two classes of mutant cells are unaffected by colicin. Vesicles from colicin-resistant strains are sensitive to colicin E1, whereas vesicles from colicin-tolerant strains are unaffected by colicin El. These results suggest that the colicin E1 receptor is on the cell membrane and that colicin-tolerant strains have altered membranes while colicin-resistant strains have altered cell walls.
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Abstract
The addition of phenethyl alcohol (PEA) to cultures of male strains of Escherichia coli rapidly prevents the adsorption of the male-specific bacteriophages f1 and f2 to the donor cells. The adsorption of f2 to F pili in cell-free preparations is unaffected by PEA. In a mating system, PEA alters the kinetics of gene transfer in minimal medium but not in broth. Sodium cyanide, azide, and iodoacetate also apparently inhibit f2 adsorption to cells but not to detached F pili. The phage adsorption inhibitory action of PEA is completely reversible in the presence of 100 mug of chloramphenicol per ml.
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Abstract
Phenethyl alcohol (PEA) caused Escherichia coli to take up greatly increased amounts of acriflavine, a compound to which healthy growing cells are impermeable. PEA also caused an increased rate of efflux (leakage) of cellular potassium under conditions which do not greatly alter the influx of potassium via the energy-dependent potassium pump. We therefore propose that the primary effect of PEA is a limited breakdown of the cell membrane. The inhibition of deoxyribonucleic acid synthesis and other cellular functions would then be secondary consequences of the alteration in the membrane structure.
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