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Longo N, Dimmock D, Levy H, Viau K, Bausell H, Bilder DA, Burton B, Gross C, Northrup H, Rohr F, Sacharow S, Sanchez-Valle A, Stuy M, Thomas J, Vockley J, Zori R, Harding CO. Evidence- and consensus-based recommendations for the use of pegvaliase in adults with phenylketonuria. Genet Med 2018; 21:1851-1867. [PMID: 30546086 PMCID: PMC6752676 DOI: 10.1038/s41436-018-0403-z] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Accepted: 11/29/2018] [Indexed: 11/23/2022] Open
Abstract
Purpose Phenylketonuria (PKU) is a rare metabolic disorder that requires
life-long management to reduce phenylalanine (Phe) concentrations within the
recommended range. The availability of pegvaliase (PALYNZIQ™, an enzyme that can
metabolize Phe) as a new therapy necessitates the provision of guidance for its
use. Methods A Steering Committee comprising 17 health-care professionals with
experience in using pegvaliase through the clinical development program drafted
guidance statements during a series of face-to-face meetings. A modified Delphi
methodology was used to demonstrate consensus among a wider group of health-care
professionals with experience in using pegvaliase. Results Guidance statements were developed for four categories: (1)
treatment goals and considerations prior to initiating therapy, (2) dosing
considerations, (3) considerations for dietary management, and (4) best
approaches to optimize medical management. A total of 34 guidance statements
were included in the modified Delphi voting and consensus was reached on all
after two rounds of voting. Conclusion Here we describe evidence- and consensus-based recommendations for
the use of pegvaliase in adults with PKU. The manuscript was evaluated against
the Appraisal of Guidelines for Research and Evaluation (AGREE II) instrument
and is intended for use by health-care professionals who will prescribe
pegvaliase and those who will treat patients receiving pegvaliase.
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Affiliation(s)
- Nicola Longo
- Division of Medical Genetics, University of Utah, Salt Lake City, UT, USA.
| | - David Dimmock
- Rady Children's Institute for Genomic Medicine, San Diego, CA, USA
| | - Harvey Levy
- Division of Genetics and Genomics, Harvard Medical School, Boston Children's Hospital, Boston, MA, USA
| | - Krista Viau
- Division of Genetics and Genomics, Harvard Medical School, Boston Children's Hospital, Boston, MA, USA
| | - Heather Bausell
- Division of Clinical Nutrition & Genetics, Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, IL, USA
| | - Deborah A Bilder
- Department of Psychiatry, University of Utah, Salt Lake City, UT, USA
| | - Barbara Burton
- Department of Medical Genetics, Ann & Robert H. Lurie Children's Hospital of Chicago and Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Christel Gross
- Department of Pediatrics, University of Florida, Gainesville, FL, USA
| | - Hope Northrup
- Division of Medical Genetics, Department of Pediatrics, McGovern Medical School, University of Texas Health Science Center at Houston, Houston, TX, USA
| | - Fran Rohr
- Nutrition Center, Boston Children's Hospital, Boston, MA, USA
| | - Stephanie Sacharow
- Division of Genetics and Genomics, Harvard Medical School, Boston Children's Hospital, Boston, MA, USA
| | | | - Mary Stuy
- Department of Medical and Molecular Genetics, IU School of Medicine, Indianapolis, IN, USA
| | - Janet Thomas
- Section of Clinical Genetics and Metabolism, University of Colorado School of Medicine, Aurora, CO, USA
| | - Jerry Vockley
- Department of Pediatrics University of Pittsburgh School of Medicine, Department of Human Genetics, University of Pittsburgh Graduate School of Public Health, Pittsburgh, PA, USA
| | - Roberto Zori
- Division of Genetics and Metabolism, University of Florida, Gainesville, FL, USA
| | - Cary O Harding
- Departments of Molecular and Medical Genetics and Pediatrics, Oregon Health & Science University, Portland, OR, USA
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Abstract
Viruses employ a variety of strategies to usurp and control cellular activities through the orchestrated recruitment of macromolecules to specific cytoplasmic or nuclear compartments. Formation of such specialized virus-induced cellular microenvironments, which have been termed viroplasms, virus factories, or virus replication centers, complexes, or compartments, depends on molecular interactions between viral and cellular factors that participate in viral genome expression and replication and are in some cases associated with sites of virion assembly. These virus-induced compartments function not only to recruit and concentrate factors required for essential steps of the viral replication cycle but also to control the cellular mechanisms of antiviral defense. In this review, we summarize characteristic features of viral replication compartments from different virus families and discuss similarities in the viral and cellular activities that are associated with their assembly and the functions they facilitate for viral replication.
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Abstract
African swine fever virus (ASFV) is a large, intracytoplasmically-replicating DNA arbovirus and the sole member of the family Asfarviridae. It is the etiologic agent of a highly lethal hemorrhagic disease of domestic swine and therefore extensively studied to elucidate the structures, genes, and mechanisms affecting viral replication in the host, virus-host interactions, and viral virulence. Increasingly apparent is the complexity with which ASFV replicates and interacts with the host cell during infection. ASFV encodes novel genes involved in host immune response modulation, viral virulence for domestic swine, and in the ability of ASFV to replicate and spread in its tick vector. The unique nature of ASFV has contributed to a broader understanding of DNA virus/host interactions.
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Affiliation(s)
- E R Tulman
- Department of Pathobiology and Veterinary Science, Center of Excellence for Vaccine Research, University of Connecticut, Storrs 06269, USA.
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Martinez-Pomares L, Simon-Mateo C, Lopez-Otin C, Viñuela E. Characterization of the African swine fever virus structural protein p14.5: a DNA binding protein. Virology 1997; 229:201-11. [PMID: 9123862 DOI: 10.1006/viro.1996.8434] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The gene encoding the structural protein p14.5 of African swine fever virus (ASFV) has been mapped and sequenced. This gene, designated E120R, is located in the Sa/l H/EcoRl E restriction fragment of the ASFV genome and is predicted to encode a protein of 120 amino acids with a molecular weight of 13.4 kDa. Northern-blot analysis showed that E120R is transcribed at late times during the viral replication cycle. The E120R gene product has been expressed in Escherichia coli, purified, and used as an antigen for antibody production. The antiserum anti-pE120R recognized a protein in infected cell extracts with an apparent molecular mass of 14.5 kDa, named p14.5. This antiserum also detected protein p14.5 in purified virus particles. Protein p14.5 is synthesized late in infection and is located in viral factories. Immunoprecipitation analysis and binding-assay experiments have shown that protein p14.5 interacts with a protein that could correspond to the major structural protein p72. Purified protein p14.5 interacts with DNA in a sequence-independent manner. It binds to both single-stranded and double-stranded DNA. A possible role of protein p14.5 in the encapsidation of ASFV DNA is suggested.
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Affiliation(s)
- L Martinez-Pomares
- Centro de Biología Molecular Sevoro Ochoa (CSIC-UAM), Facultad de Ciencias, Universidad Autónoma, Madrid, Spain
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Borca MV, Irusta PM, Kutish GF, Carillo C, Afonso CL, Burrage AT, Neilan JG, Rock DL. A structural DNA binding protein of African swine fever virus with similarity to bacterial histone-like proteins. Arch Virol 1996; 141:301-13. [PMID: 8634022 DOI: 10.1007/bf01718401] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Here we describe an African swine fever virus (ASFV) protein encoded by the open reading frame 5-AR that shares structural and functional similarities with the family of bacterial histone-like proteins which include histone-like DNA binding proteins, integration host factor, and Bacillus phage SPO1 transcription factor, TF1. The ASFV 5-AR gene was cloned by PCR and expressed in E. coli. Monospecific antiserum prepared to the 5-AR bacterial expression product specifically immunoprecipitated a protein of approximately 11.6 kDa from ASFV infected swine macrophages at late times post infection. Additionally, the 5-AR expression product was strongly recognized by ASFV convalescent pig serum, indicating its antigenicity during natural infection. Cloned p11.6 bound both double and single stranded DNA-cellulose columns. Consistent with a DNA binding function, immunoelectronmicroscopy localized p11.6 to the virion nucleoid, To our knowledge, p11.6 is the first bacterial histone-like DNA-binding protein found in an animal virus or eukaryotic cell system.
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Affiliation(s)
- M V Borca
- ARS, USDA, Plum Island Animal Disease Center, Greenport, New York 11944-0848, U.S.A
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Muñoz M, Freije JM, Salas ML, Viñuela E, López-Otín C. Structure and expression in E. coli of the gene coding for protein p10 of African swine fever virus. Arch Virol 1993; 130:93-107. [PMID: 8503790 DOI: 10.1007/bf01318999] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The gene encoding protein p10, a structural protein of African swine fever (ASF) virus, has been mapped, sequenced and expressed in E. coli. Protein p10 was purified from dissociated virus by reverse-phase HPLC, and its NH2-terminal end identified by automated Edman degradation. To map the gene encoding protein p10, a mixture of 20-mer oligonucleotides based upon a part of the amino acid sequence was hybridized to cloned ASF virus restriction fragments. This allowed the localization of the gene in fragment Eco RI K of the ASF virus genome. The nucleotide sequence obtained from this region revealed an open reading frame encoding 78 amino acids, with a high content of Ser and Lys residues. Several of the Ser residues are found in Ser-rich regions, which are also found in some nucleic acid-binding proteins. The gene coding for protein p10 has been inserted in an expression vector which contains the promoter for T7 RNA polymerase. The recombinant plasmid was used to produce the ASF virus protein in E. coli. The bacterially produced p10 protein shows a strong DNA binding activity with similar affinity for both double-stranded and single-stranded DNA.
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Affiliation(s)
- M Muñoz
- Departamento de Biología Funcional Facultad de Medicina, Universidad de Oviedo, Spain
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Caeiro F, Meireles M, Ribeiro G, Costa JV. In vitro DNA replication by cytoplasmic extracts from cells infected with African swine fever virus. Virology 1990; 179:87-94. [PMID: 2219742 DOI: 10.1016/0042-6822(90)90277-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A cell-free system that catalyzes DNA replication was prepared from cytoplasmic extracts of Vero cells infected with African swine fever virus (ASFV). The cells were permeabilized with lysolecithin and disrupted by mild mechanical action and the nuclei were removed by low-speed centrifugation. Extracts prepared from infected cells at the time of maximal DNA replication incorporated [alpha-32P]dTTP into acid-insoluble material that was sensitive to DNase and resistant to RNase. The reaction was inhibited by phosphonoacetic acid, an inhibitor of ASFV-specific DNA polymerase. Extracts from mock-infected cells had a negligible activity. Micrococcal nuclease-treated extracts were able to replicate added virion DNA or viral replicative DNA. An increase in the mass of DNA detected by ethidium bromide staining and by dot blot hybridization with ASFV DNA showed that the incorporation was due to true replication. Plasmid DNA was also replicated, which indicates that ASFV-specific DNA polymerase does not require a virus-specific origin of replication. The pattern of fragments generated by EcoRI digestion of the in vitro product was characteristic of viral replicative DNA. Hybridization with a recombinant plasmid containing a terminal fragment of ASFV DNA confirmed the presence of dimer terminal ASFV fragments presumably generated from concatemeric replicative intermediates.
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Affiliation(s)
- F Caeiro
- Gulbenkian Institute of Science, Oeiras Codex, Portugal
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