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Martins ASG, Reis SD, Benson E, Domingues MM, Cortinhas J, Vidal Silva JA, Santos SD, Santos NC, Pêgo AP, Moreno PMD. Enhancing Neuronal Cell Uptake of Therapeutic Nucleic Acids with Tetrahedral DNA Nanostructures. Small 2024:e2309140. [PMID: 38342712 DOI: 10.1002/smll.202309140] [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] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 12/22/2023] [Indexed: 02/13/2024]
Abstract
The successful translation of therapeutic nucleic acids (NAs) for the treatment of neurological disorders depends on their safe and efficient delivery to neural cells, in particular neurons. DNA nanostructures can be a promising NAs delivery vehicle. Nonetheless, the potential of DNA nanostructures for neuronal cell delivery of therapeutic NAs is unexplored. Here, tetrahedral DNA nanostructures (TDN) as siRNA delivery scaffolds to neuronal cells, exploring the influence of functionalization with two different reported neuronal targeting ligands: C4-3 RNA aptamer and Tet1 peptide are investigated. Nanostructures are characterized in vitro, as well as in silico using molecular dynamic simulations to better understand the overall TDN structural stability. Enhancement of neuronal cell uptake of TDN functionalized with the C4-3 Aptamer (TDN-Apt), not only in neuronal cell lines but also in primary neuronal cell cultures is demonstrated. Additionally, TDN and TDN-Apt nanostructures carrying siRNA are shown to promote silencing in a process aided by chloroquine-induced endosomal disruption. This work presents a thorough workflow for the structural and functional characterization of the proposed TDN as a nano-scaffold for neuronal delivery of therapeutic NAs and for targeting ligands evaluation, contributing to the future development of new neuronal drug delivery systems based on DNA nanostructures.
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Affiliation(s)
- Ana S G Martins
- i3S (Instituto de Investigação e Inovação em Saúde), Universidade do Porto, INEB (Instituto Nacional de Engenharia Biomédica), Rua Alfredo Allen, 208, Porto, 4200-135, Portugal
- Faculty of Engineering of the University of Porto, Rua Dr. Roberto Frias, s/n, Porto, 4200-465, Portugal
| | - Sara D Reis
- i3S (Instituto de Investigação e Inovação em Saúde), Universidade do Porto, INEB (Instituto Nacional de Engenharia Biomédica), Rua Alfredo Allen, 208, Porto, 4200-135, Portugal
| | - Erik Benson
- SciLifeLab, Department of Microbiology, Tumor and Cell Biology, Tomtebodavägen 23, Solna, 171 65, Sweden
| | - Marco M Domingues
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Av. Prof. Egas Moniz, Lisbon, 1649-028, Portugal
| | - João Cortinhas
- i3S (Instituto de Investigação e Inovação em Saúde), Universidade do Porto, INEB (Instituto Nacional de Engenharia Biomédica), Rua Alfredo Allen, 208, Porto, 4200-135, Portugal
| | - Joana A Vidal Silva
- i3S (Instituto de Investigação e Inovação em Saúde), Universidade do Porto, INEB (Instituto Nacional de Engenharia Biomédica), Rua Alfredo Allen, 208, Porto, 4200-135, Portugal
| | - Sofia D Santos
- i3S (Instituto de Investigação e Inovação em Saúde), Universidade do Porto, INEB (Instituto Nacional de Engenharia Biomédica), Rua Alfredo Allen, 208, Porto, 4200-135, Portugal
| | - Nuno C Santos
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Av. Prof. Egas Moniz, Lisbon, 1649-028, Portugal
| | - Ana P Pêgo
- i3S (Instituto de Investigação e Inovação em Saúde), Universidade do Porto, INEB (Instituto Nacional de Engenharia Biomédica), Rua Alfredo Allen, 208, Porto, 4200-135, Portugal
- Instituto de Ciências Biomédicas Abel Salazar da Universidade do Porto, Rua de Jorge Viterbo Ferreira, 228, Porto, 4050-313, Portugal
| | - Pedro M D Moreno
- i3S (Instituto de Investigação e Inovação em Saúde), Universidade do Porto, INEB (Instituto Nacional de Engenharia Biomédica), Rua Alfredo Allen, 208, Porto, 4200-135, Portugal
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2
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Kilwing L, Lill P, Nathwani B, Guerra R, Benson E, Liedl T, Shih WM. Multilayer DNA Origami with Terminal Interfaces That Are Flat and Wide-Area. ACS Nano 2024; 18:885-893. [PMID: 38109901 DOI: 10.1021/acsnano.3c09522] [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] [Subscribe] [Scholar Register] [Indexed: 12/20/2023]
Abstract
DNA origami is a popular nanofabrication strategy that employs self-assembly of a long single scaffold strand, typically less than 10 kilobases in length, with hundreds of shorter staple strands into a desired shape. In particular, origami arranged as a single-layer rectangle has proven popular as flat pegboards that can display functionalities at staple-strand breakpoints, off the sides of the constituent double helices, with a ∼5.3 nm rhombic-lattice spacing. For applications that demand tighter spacing, functionalities can be displayed instead on the termini of helices of multilayer DNA origami. However, pegboards with the greatest addressable surface area are often found to be the most versatile. Given the practical limitations of the length of the scaffold that can be easily realized, designs that minimize the length of each helix would have advantages for maximizing the number of helices and therefore the number of addressable pixels on each terminal surface. Here we present an architecture for multilayer DNA origami displaying flush terminal interfaces from over 200 helices that each are only 5.3 turns in length. We characterize an example using cryo-EM imaging paired with single-particle analysis for further analysis of the global structure.
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Affiliation(s)
- Luzia Kilwing
- Faculty of Physics and Center for NanoScience (CeNS), Ludwig-Maximilians-University, Geschwister-Scholl-Platz 1, 80539 Munich, Germany
- Department of Cancer Biology, Dana-Farber Cancer Institute; Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, Massachusetts 02115, United States
| | - Pascal Lill
- Department of Cancer Biology, Dana-Farber Cancer Institute; Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, Massachusetts 02115, United States
| | - Bhavik Nathwani
- Department of Cancer Biology, Dana-Farber Cancer Institute; Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, Massachusetts 02115, United States
| | - Richard Guerra
- Department of Cancer Biology, Dana-Farber Cancer Institute; Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, Massachusetts 02115, United States
| | - Erik Benson
- Department of Physics, University of Oxford, Clarendon Laboratory, Oxford OX1 3PU, United Kingdom
- The Kavli Institute for Nanoscience Discovery, University of Oxford, New Biochemistry Building, Oxford OX1 3PU, United Kingdom
- Science for Life Laboratory, Department of Gene Technology, KTH Royal Institute of Technology, Stockholm 171 65, Sweden
| | - Tim Liedl
- Faculty of Physics and Center for NanoScience (CeNS), Ludwig-Maximilians-University, Geschwister-Scholl-Platz 1, 80539 Munich, Germany
| | - William M Shih
- Department of Cancer Biology, Dana-Farber Cancer Institute; Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, Massachusetts 02115, United States
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3
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Benson E, Bath J. Reconfigurable self-assembled DNA devices. Sci Robot 2023; 8:eadh8148. [PMID: 37099637 DOI: 10.1126/scirobotics.adh8148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/28/2023]
Abstract
Modular reconfigurable systems can be achieved with DNA origami, demonstrating the potential to generate molecular robots.
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Affiliation(s)
- Erik Benson
- Science for Life Laboratory, Department of Gene Technology, KTH Royal Institute of Technology, Stockholm, Sweden
| | - Jonathan Bath
- Department of Physics, University of Oxford, Clarendon Laboratory, Oxford, UK
- Kavli Institute for Nanoscience Discovery, University of Oxford, New Biochemistry Building, Oxford, UK
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4
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Doye JPK, Fowler H, Prešern D, Bohlin J, Rovigatti L, Romano F, Šulc P, Wong CK, Louis AA, Schreck JS, Engel MC, Matthies M, Benson E, Poppleton E, Snodin BEK. The oxDNA Coarse-Grained Model as a Tool to Simulate DNA Origami. Methods Mol Biol 2023; 2639:93-112. [PMID: 37166713 DOI: 10.1007/978-1-0716-3028-0_6] [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: 05/12/2023]
Abstract
This chapter introduces how to run molecular dynamics simulations for DNA origami using the oxDNA coarse-grained model.
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Affiliation(s)
- Jonathan P K Doye
- Physical and Theoretical Chemistry Laboratory, Department of Chemistry, University of Oxford, Oxford, UK.
| | - Hannah Fowler
- Physical and Theoretical Chemistry Laboratory, Department of Chemistry, University of Oxford, Oxford, UK
| | - Domen Prešern
- Physical and Theoretical Chemistry Laboratory, Department of Chemistry, University of Oxford, Oxford, UK
| | - Joakim Bohlin
- Department of Physics, Clarendon Laboratory, University of Oxford, Oxford, UK
| | | | - Flavio Romano
- Dipartimento di Fisica, Sapienza Universitá di Roma, Rome, Italy
| | - Petr Šulc
- School of Molecular Sciences and Center for Molecular Design and Biomimetics, The Biodesign Institute, Arizona State University, Tempe, AZ, USA
| | - Chak Kui Wong
- Physical and Theoretical Chemistry Laboratory, Department of Chemistry, University of Oxford, Oxford, UK
| | - Ard A Louis
- Rudolf Peierls Centre for Theoretical Physics, University of Oxford, Parks Road, Oxford, UK
| | - John S Schreck
- Computational and Information Systems Laboratory, National Center for Atmospheric Research (NCAR), Boulder, USA
| | - Megan C Engel
- School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA
| | - Michael Matthies
- School of Molecular Sciences and Center for Molecular Design and Biomimetics, The Biodesign Institute, Arizona State University, Tempe, AZ, USA
| | - Erik Benson
- Department of Physics, Clarendon Laboratory, University of Oxford, Oxford, UK
| | - Erik Poppleton
- School of Molecular Sciences and Center for Molecular Design and Biomimetics, The Biodesign Institute, Arizona State University, Tempe, AZ, USA
| | - Benedict E K Snodin
- Department of Philosophy, Future of Humanity Institute, University of Oxford, Oxford, UK
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Abstract
Nanoscale manipulation and patterning usually require costly and sensitive top-down techniques such as those used in scanning probe microscopies or in semiconductor lithography. DNA nanotechnology enables exploration of bottom-up fabrication and has previously been used to design self-assembling components capable of linear and rotary motion. In this work, we combine three independently controllable DNA origami linear actuators to create a nanoscale robotic printer. The two-axis positioning mechanism comprises a moveable gantry, running on parallel rails, threading a mobile sleeve. We show that the device is capable of reversibly positioning a write head over a canvas through the addition of signaling oligonucleotides. We demonstrate "write" functionality by using the head to catalyze a local DNA strand-exchange reaction, selectively modifying pixels on a canvas. This work demonstrates the power of DNA nanotechnology for creating nanoscale robotic components and could find application in surface manufacturing, biophysical studies, and templated chemistry.
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Affiliation(s)
- Erik Benson
- Department of Physics, University of Oxford, Clarendon Laboratory, Oxford, UK.,The Kavli Institute for Nanoscience Discovery, University of Oxford, New Biochemistry Building, Oxford, UK
| | - Rafael Carrascosa Marzo
- Department of Physics, University of Oxford, Clarendon Laboratory, Oxford, UK.,The Kavli Institute for Nanoscience Discovery, University of Oxford, New Biochemistry Building, Oxford, UK
| | - Jonathan Bath
- Department of Physics, University of Oxford, Clarendon Laboratory, Oxford, UK.,The Kavli Institute for Nanoscience Discovery, University of Oxford, New Biochemistry Building, Oxford, UK
| | - Andrew J Turberfield
- Department of Physics, University of Oxford, Clarendon Laboratory, Oxford, UK.,The Kavli Institute for Nanoscience Discovery, University of Oxford, New Biochemistry Building, Oxford, UK
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Benson E, Ferguson-Lobo R, Chava C, Yoong W. 116 COVID-19: What do pregnant women know now? A cross sectional study. Eur J Obstet Gynecol Reprod Biol 2022. [PMCID: PMC8941279 DOI: 10.1016/j.ejogrb.2021.11.212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Wang Y, Benson E, Fördős F, Lolaico M, Baars I, Fang T, Teixeira A, Högberg B. DNA Origami Penetration in Cell Spheroid Tissue Models is Enhanced by Wireframe Design. Adv Mater 2021; 33:e2008457. [PMID: 34096116 PMCID: PMC7613750 DOI: 10.1002/adma.202008457] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 03/05/2021] [Indexed: 05/16/2023]
Abstract
As DNA origami applications in biomedicine are expanding, more knowledge is needed to assess these structures' interaction with biological systems. Here, uptake and penetration in cell and cell spheroid tissue models (CSTMs) are studied to elucidate whether differences in internal structure can be a factor in the efficacy of DNA-origami-based delivery. Two structures bearing largely similar features in terms of both geometry and molecular weight, but with different internal designs-being either compact, lattice-based origami or following an open, wireframe design-are designed. In CSTMs, wireframe rods are able to penetrate deeper than close-packed rods. Moreover, doxorubicin-loaded wireframe rods show a higher cytotoxicity in CSTMs. These results can be explained by differences in structural mechanics, local deformability, local material density, and accessibility to cell receptors between these two DNA origami design paradigms. In particular, it is suggested that the main reason for the difference in penetration dynamic arises from differences in interaction with scavenger receptors where lattice-based structures appear to be internalized to a higher degree than polygonal structures of the same size and shape. It is thus argued that the choice of structural design method constitutes a crucial parameter for the application of DNA origami in drug delivery.
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Affiliation(s)
- Yang Wang
- Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm SE-17177, Sweden
| | - Erik Benson
- Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm SE-17177, Sweden
| | - Ferenc Fördős
- Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm SE-17177, Sweden
| | - Marco Lolaico
- Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm SE-17177, Sweden
| | - Igor Baars
- Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm SE-17177, Sweden
| | - Trixy Fang
- Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm SE-17177, Sweden
| | - Ana Teixeira
- Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm SE-17177, Sweden
| | - Björn Högberg
- Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm SE-17177, Sweden
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Benson E, Carrascosa Marzo R, Bath J, Turberfield AJ. Strategies for Constructing and Operating DNA Origami Linear Actuators. Small 2021; 17:e2007704. [PMID: 33942502 DOI: 10.1002/smll.202007704] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 02/22/2021] [Indexed: 06/12/2023]
Abstract
Linear actuators are ubiquitous components at all scales of engineering. DNA nanotechnology offers a unique opportunity for bottom-up assembly at the molecular scale, providing nanoscale precision with multiple methods for constructing and operating devices. In this paper, DNA origami linear actuators with up to 200 nm travel, based on a rail threading a topologically locked slider, are demonstrated. Two strategies, one- and two-pot assembly, are demonstrated whereby the two components are folded from one or two DNA scaffold strands, respectively. In order to control the position of the slider on the rail, the rail and the inside of the slider are decorated with single-stranded oligonucleotides with distinct sequences. Two positioning strategies, based on diffusion and capture of signaling strands, are used to link the slider reversibly to determined positions on the rail with high yield and precision. These machine components provide a basis for applications in molecular machinery and nanoscale manufacture including programmed chemical synthesis.
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Affiliation(s)
- Erik Benson
- Department of Physics, University of Oxford, Parks Road, Oxford, OX1 3PU, UK
| | | | - Jonathan Bath
- Department of Physics, University of Oxford, Parks Road, Oxford, OX1 3PU, UK
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9
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Ryan C, Kendall V, Hildage J, Clegg M, Benson E, Iqbal N, Orr A, Jones A, Green H. P119 Improving Home IV outcomes. J Cyst Fibros 2021. [DOI: 10.1016/s1569-1993(21)01145-0] [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: 11/27/2022]
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10
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Duffy JMN, Adamson GD, Benson E, Bhattacharya S, Bhattacharya S, Bofill M, Brian K, Collura B, Curtis C, Evers JLH, Farquharson RG, Fincham A, Franik S, Giudice LC, Glanville E, Hickey M, Horne AW, Hull ML, Johnson NP, Jordan V, Khalaf Y, Knijnenburg JML, Legro RS, Lensen S, MacKenzie J, Mavrelos D, Mol BW, Morbeck DE, Nagels H, Ng EHY, Niederberger C, Otter AS, Puscasiu L, Rautakallio-Hokkanen S, Sadler L, Sarris I, Showell M, Stewart J, Strandell A, Strawbridge C, Vail A, van Wely M, Vercoe M, Vuong NL, Wang AY, Wang R, Wilkinson J, Wong K, Wong TY, Farquhar CM. Top 10 priorities for future infertility research: an international consensus development study. Fertil Steril 2021; 115:180-190. [PMID: 33272617 DOI: 10.1016/j.fertnstert.2020.11.014] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [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: 05/11/2020] [Revised: 07/05/2020] [Accepted: 07/22/2020] [Indexed: 12/21/2022]
Abstract
STUDY QUESTION Can the priorities for future research in infertility be identified? SUMMARY ANSWER The top 10 research priorities for the four areas of male infertility, female and unexplained infertility, medically assisted reproduction, and ethics, access, and organization of care for people with fertility problems were identified. WHAT IS KNOWN ALREADY Many fundamental questions regarding the prevention, management, and consequences of infertility remain unanswered. This is a barrier to improving the care received by those people with fertility problems. STUDY DESIGN, SIZE, DURATION Potential research questions were collated from an initial international survey, a systematic review of clinical practice guidelines, and Cochrane systematic reviews. A rationalized list of confirmed research uncertainties was prioritized in an interim international survey. Prioritized research uncertainties were discussed during a consensus development meeting. Using a formal consensus development method, the modified nominal group technique, diverse stakeholders identified the top 10 research priorities for each of the categories male infertility, female and unexplained infertility, medically assisted reproduction, and ethics, access, and organization of care. PARTICIPANTS/MATERIALS, SETTING, METHODS Healthcare professionals, people with fertility problems, and others (healthcare funders, healthcare providers, healthcare regulators, research funding bodies and researchers) were brought together in an open and transparent process using formal consensus methods advocated by the James Lind Alliance. MAIN RESULTS AND THE ROLE OF CHANCE The initial survey was completed by 388 participants from 40 countries, and 423 potential research questions were submitted. Fourteen clinical practice guidelines and 162 Cochrane systematic reviews identified a further 236 potential research questions. A rationalized list of 231 confirmed research uncertainties were entered into an interim prioritization survey completed by 317 respondents from 43 countries. The top 10 research priorities for each of the four categories male infertility, female and unexplained infertility (including age-related infertility, ovarian cysts, uterine cavity abnormalities, and tubal factor infertility), medically assisted reproduction (including ovarian stimulation, IUI, and IVF), and ethics, access, and organization of care, were identified during a consensus development meeting involving 41 participants from 11 countries. These research priorities were diverse and seek answers to questions regarding prevention, treatment, and the longer-term impact of infertility. They highlight the importance of pursuing research which has often been overlooked, including addressing the emotional and psychological impact of infertility, improving access to fertility treatment, particularly in lower resource settings, and securing appropriate regulation. Addressing these priorities will require diverse research methodologies, including laboratory-based science, qualitative and quantitative research, and population science. LIMITATIONS, REASONS FOR CAUTION We used consensus development methods, which have inherent limitations, including the representativeness of the participant sample, methodological decisions informed by professional judgement, and arbitrary consensus definitions. WIDER IMPLICATIONS OF THE FINDINGS We anticipate that identified research priorities, developed to specifically highlight the most pressing clinical needs as perceived by healthcare professionals, people with fertility problems, and others, will help research funding organizations and researchers to develop their future research agenda. STUDY FUNDING/ COMPETING INTEREST(S) The study was funded by the Auckland Medical Research Foundation, Catalyst Fund, Royal Society of New Zealand, and Maurice and Phyllis Paykel Trust. Geoffrey Adamson reports research sponsorship from Abbott, personal fees from Abbott and LabCorp, a financial interest in Advanced Reproductive Care, committee membership of the FIGO Committee on Reproductive Medicine, International Committee for Monitoring Assisted Reproductive Technologies, International Federation of Fertility Societies, and World Endometriosis Research Foundation, and research sponsorship of the International Committee for Monitoring Assisted Reproductive Technologies from Abbott and Ferring. Siladitya Bhattacharya reports being the Editor-in-Chief of Human Reproduction Open and editor for the Cochrane Gynaecology and Fertility Group. Hans Evers reports being the Editor Emeritus of Human Reproduction. Andrew Horne reports research sponsorship from the Chief Scientist's Office, Ferring, Medical Research Council, National Institute for Health Research, and Wellbeing of Women and consultancy fees from Abbvie, Ferring, Nordic Pharma, and Roche Diagnostics. M. Louise Hull reports grants from Merck, grants from Myovant, grants from Bayer, outside the submitted work and ownership in Embrace Fertility, a private fertility company. Neil Johnson reports research sponsorship from Abb-Vie and Myovant Sciences and consultancy fees from Guerbet, Myovant Sciences, Roche Diagnostics, and Vifor Pharma. José Knijnenburg reports research sponsorship from Ferring and Theramex. Richard Legro reports consultancy fees from Abbvie, Bayer, Ferring, Fractyl, Insud Pharma and Kindex and research sponsorship from Guerbet and Hass Avocado Board. Ben Mol reports consultancy fees from Guerbet, iGenomix, Merck, Merck KGaA and ObsEva. Ernest Ng reports research sponsorship from Merck. Craig Niederberger reports being the Co Editor-in-Chief of Fertility and Sterility and Section Editor of the Journal of Urology, research sponsorship from Ferring, and retains a financial interest in NexHand. Jane Stewart reports being employed by a National Health Service fertility clinic, consultancy fees from Merck for educational events, sponsorship to attend a fertility conference from Ferring, and being a clinical subeditor of Human Fertility. Annika Strandell reports consultancy fees from Guerbet. Jack Wilkinson reports being a statistical editor for the Cochrane Gynaecology and Fertility Group. Andy Vail reports that he is a Statistical Editor of the Cochrane Gynaecology & Fertility Review Group and of the journal Reproduction. His employing institution has received payment from HFEA for his advice on review of research evidence to inform their 'traffic light' system for infertility treatment 'add-ons'. Lan Vuong reports consultancy and conference fees from Ferring, Merck and Merck Sharp and Dohme. The remaining authors declare no competing interests in relation to the present work. All authors have completed the disclosure form. TRIAL REGISTRATION NUMBER Not applicable.
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Affiliation(s)
- J M N Duffy
- King's Fertility, Fetal Medicine Research Institute, London, UK; Institute for Women's Health, University College London, London, UK.
| | - G D Adamson
- ARC Fertility, Cupertino, California, United States
| | - E Benson
- Patient and Public Participation Group, Priority Setting Partnership for Infertility, University of Auckland, Auckland, New Zealand
| | - S Bhattacharya
- Institute of Applied Health Sciences, University of Aberdeen, Aberdeen, UK
| | - S Bhattacharya
- Institute of Applied Health Sciences, University of Aberdeen, Aberdeen, UK
| | - M Bofill
- Department of Obstetrics and Gynaecology, University of Auckland, Auckland, New Zealand
| | - K Brian
- Women's Network, Royal College of Obstetricians and Gynecologists, London, UK
| | - B Collura
- Resolve: The National Infertility Association, Virginia, United States
| | - C Curtis
- School of Psychology, University of Waikato, Hamilton, New Zealand
| | - J L H Evers
- Centre for Reproductive Medicine and Biology, University Medical Centre Maastricht, Maastricht, The Netherlands
| | - R G Farquharson
- Department of Obstetrics and Gynaecology, Liverpool Women's NHS Foundation Trust, Liverpool, UK
| | | | - S Franik
- Department of Obstetrics and Gynaecology, Münster University Hospital, Münster, Germany
| | - L C Giudice
- Center for Research, Innovation and Training in Reproduction and Infertility, Center for Reproductive Sciences, University of California, San Francisco, California, United States; International Federation of Fertility Societies, Mount Royal, New Jersey, United States
| | - E Glanville
- Auckland District Health Board, Auckland, New Zealand
| | - M Hickey
- Department of Obstetrics and Gynaecology, University of Melbourne, Victoria, Australia
| | - A W Horne
- MRC Centre for Reproductive Health, University of Edinburgh, Edinburgh, UK
| | - M L Hull
- Robinson Research Institute and Adelaide Medical School, University of Adelaide, Adelaide, Australia
| | - N P Johnson
- Robinson Research Institute and Adelaide Medical School, University of Adelaide, Adelaide, Australia
| | - V Jordan
- Department of Obstetrics and Gynaecology, University of Auckland, Auckland, New Zealand
| | - Y Khalaf
- Department of Women and Children's Health, Kings College London, London, UK
| | | | - R S Legro
- Department of Obstetrics and Gynaecology, Penn State College of Medicine, Pennsylvania
| | - S Lensen
- Department of Obstetrics and Gynaecology, University of Melbourne, Victoria, Australia
| | | | - D Mavrelos
- Reproductive Medicine Unit, University College Hospital, London, UK
| | - B W Mol
- Department of Obstetrics and Gynaecology, Monash University, Melbourne, Australia
| | - D E Morbeck
- Department of Obstetrics and Gynaecology, University of Auckland, Auckland, New Zealand; Fertility Associates, Auckland, New Zealand
| | - H Nagels
- Cochrane Gynaecology and Fertility, University of Auckland, Auckland, New Zealand
| | - E H Y Ng
- Department of Obstetrics and Gynaecology, The University of Hong Kong, Hong Kong; Shenzhen Key Laboratory of Fertility Regulation, The University of Hong Kong-Shenzhen Hospital, China
| | - C Niederberger
- Department of Urology, University of Illinois at Chicago College of Medicine, Chicago, Illinois
| | | | - L Puscasiu
- Pharmacy, Science, and Technology, University of Medicine, Targu Mures, Romania; Center for Reproductive Medicine, Amsterdam Reproduction and Development Institute, Amsterdam University Medical Centres, Amsterdam, The Netherlands
| | | | - L Sadler
- Department of Obstetrics and Gynaecology, University of Auckland, Auckland, New Zealand; Auckland District Health Board, Auckland, New Zealand
| | - I Sarris
- King's Fertility, Fetal Medicine Research Institute, London, UK
| | - M Showell
- Cochrane Gynaecology and Fertility, University of Auckland, Auckland, New Zealand
| | - J Stewart
- British Fertility Society, Middlesex, UK
| | - A Strandell
- Sahlgrenska Academy, Dept of Obstetrics and Gynecology, University of Gothenburg, Sahlgrenska University Hospital, Göteborg, Sweden
| | | | - A Vail
- Centre for Biostatistics, University of Manchester, Manchester Academic Health Science Centre, Manchester, UK
| | - M van Wely
- Center for Reproductive Medicine, Amsterdam Reproduction and Development Institute, Amsterdam University Medical Centres, Amsterdam, The Netherlands
| | - M Vercoe
- Cochrane Gynaecology and Fertility, University of Auckland, Auckland, New Zealand
| | - N L Vuong
- Department of Obstetrics and Gynaecology, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - A Y Wang
- Australian Centre for Public and Population Health Research, Faculty of Health, University of Technology Sydney, Australia
| | - R Wang
- Department of Obstetrics and Gynaecology, Monash University, Melbourne, Australia
| | - J Wilkinson
- Centre for Biostatistics, University of Manchester, Manchester Academic Health Science Centre, Manchester, UK
| | - K Wong
- School of Psychology, University of Waikato, Hamilton, New Zealand
| | - T Y Wong
- Auckland District Health Board, Auckland, New Zealand
| | - C M Farquhar
- Department of Obstetrics and Gynaecology, University of Auckland, Auckland, New Zealand; Cochrane Gynaecology and Fertility, University of Auckland, Auckland, New Zealand
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Duffy JMN, Adamson GD, Benson E, Bhattacharya S, Bhattacharya S, Bofill M, Brian K, Collura B, Curtis C, Evers JLH, Farquharson RG, Fincham A, Franik S, Giudice LC, Glanville E, Hickey M, Horne AW, Hull ML, Johnson NP, Jordan V, Khalaf Y, Knijnenburg JML, Legro RS, Lensen S, MacKenzie J, Mavrelos D, Mol BW, Morbeck DE, Nagels H, Ng EHY, Niederberger C, Otter AS, Puscasiu L, Rautakallio-Hokkanen S, Sadler L, Sarris I, Showell M, Stewart J, Strandell A, Strawbridge C, Vail A, van Wely M, Vercoe M, Vuong NL, Wang AY, Wang R, Wilkinson J, Wong K, Wong TY, Farquhar CM. Top 10 priorities for future infertility research: an international consensus development study† ‡. Hum Reprod 2020; 35:2715-2724. [PMID: 33252677 PMCID: PMC7744161 DOI: 10.1093/humrep/deaa242] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Revised: 07/05/2020] [Indexed: 12/13/2022] Open
Abstract
STUDY QUESTION Can the priorities for future research in infertility be identified? SUMMARY ANSWER The top 10 research priorities for the four areas of male infertility, female and unexplained infertility, medically assisted reproduction and ethics, access and organization of care for people with fertility problems were identified. WHAT IS KNOWN ALREADY Many fundamental questions regarding the prevention, management and consequences of infertility remain unanswered. This is a barrier to improving the care received by those people with fertility problems. STUDY DESIGN, SIZE, DURATION Potential research questions were collated from an initial international survey, a systematic review of clinical practice guidelines and Cochrane systematic reviews. A rationalized list of confirmed research uncertainties was prioritized in an interim international survey. Prioritized research uncertainties were discussed during a consensus development meeting. Using a formal consensus development method, the modified nominal group technique, diverse stakeholders identified the top 10 research priorities for each of the categories male infertility, female and unexplained infertility, medically assisted reproduction and ethics, access and organization of care. PARTICIPANTS/MATERIALS, SETTING, METHODS Healthcare professionals, people with fertility problems and others (healthcare funders, healthcare providers, healthcare regulators, research funding bodies and researchers) were brought together in an open and transparent process using formal consensus methods advocated by the James Lind Alliance. MAIN RESULTS AND THE ROLE OF CHANCE The initial survey was completed by 388 participants from 40 countries, and 423 potential research questions were submitted. Fourteen clinical practice guidelines and 162 Cochrane systematic reviews identified a further 236 potential research questions. A rationalized list of 231 confirmed research uncertainties was entered into an interim prioritization survey completed by 317 respondents from 43 countries. The top 10 research priorities for each of the four categories male infertility, female and unexplained infertility (including age-related infertility, ovarian cysts, uterine cavity abnormalities and tubal factor infertility), medically assisted reproduction (including ovarian stimulation, IUI and IVF) and ethics, access and organization of care were identified during a consensus development meeting involving 41 participants from 11 countries. These research priorities were diverse and seek answers to questions regarding prevention, treatment and the longer-term impact of infertility. They highlight the importance of pursuing research which has often been overlooked, including addressing the emotional and psychological impact of infertility, improving access to fertility treatment, particularly in lower resource settings and securing appropriate regulation. Addressing these priorities will require diverse research methodologies, including laboratory-based science, qualitative and quantitative research and population science. LIMITATIONS, REASONS FOR CAUTION We used consensus development methods, which have inherent limitations, including the representativeness of the participant sample, methodological decisions informed by professional judgment and arbitrary consensus definitions. WIDER IMPLICATIONS OF THE FINDINGS We anticipate that identified research priorities, developed to specifically highlight the most pressing clinical needs as perceived by healthcare professionals, people with fertility problems and others, will help research funding organizations and researchers to develop their future research agenda. STUDY FUNDING/COMPETING INTEREST(S) The study was funded by the Auckland Medical Research Foundation, Catalyst Fund, Royal Society of New Zealand and Maurice and Phyllis Paykel Trust. G.D.A. reports research sponsorship from Abbott, personal fees from Abbott and LabCorp, a financial interest in Advanced Reproductive Care, committee membership of the FIGO Committee on Reproductive Medicine, International Committee for Monitoring Assisted Reproductive Technologies, International Federation of Fertility Societies and World Endometriosis Research Foundation, and research sponsorship of the International Committee for Monitoring Assisted Reproductive Technologies from Abbott and Ferring. Siladitya Bhattacharya reports being the Editor-in-Chief of Human Reproduction Open and editor for the Cochrane Gynaecology and Fertility Group. J.L.H.E. reports being the Editor Emeritus of Human Reproduction. A.W.H. reports research sponsorship from the Chief Scientist's Office, Ferring, Medical Research Council, National Institute for Health Research and Wellbeing of Women and consultancy fees from AbbVie, Ferring, Nordic Pharma and Roche Diagnostics. M.L.H. reports grants from Merck, grants from Myovant, grants from Bayer, outside the submitted work and ownership in Embrace Fertility, a private fertility company. N.P.J. reports research sponsorship from AbbVie and Myovant Sciences and consultancy fees from Guerbet, Myovant Sciences, Roche Diagnostics and Vifor Pharma. J.M.L.K. reports research sponsorship from Ferring and Theramex. R.S.L. reports consultancy fees from AbbVie, Bayer, Ferring, Fractyl, Insud Pharma and Kindex and research sponsorship from Guerbet and Hass Avocado Board. B.W.M. reports consultancy fees from Guerbet, iGenomix, Merck, Merck KGaA and ObsEva. E.H.Y.N. reports research sponsorship from Merck. C.N. reports being the Co Editor-in-Chief of Fertility and Sterility and Section Editor of the Journal of Urology, research sponsorship from Ferring and retains a financial interest in NexHand. J.S. reports being employed by a National Health Service fertility clinic, consultancy fees from Merck for educational events, sponsorship to attend a fertility conference from Ferring and being a clinical subeditor of Human Fertility. A.S. reports consultancy fees from Guerbet. J.W. reports being a statistical editor for the Cochrane Gynaecology and Fertility Group. A.V. reports that he is a Statistical Editor of the Cochrane Gynaecology & Fertility Review Group and the journal Reproduction. His employing institution has received payment from Human Fertilisation and Embryology Authority for his advice on review of research evidence to inform their 'traffic light' system for infertility treatment 'add-ons'. N.L.V. reports consultancy and conference fees from Ferring, Merck and Merck Sharp and Dohme. The remaining authors declare no competing interests in relation to the present work. All authors have completed the disclosure form. TRIAL REGISTRATION NUMBER N/A.
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Affiliation(s)
- J M N Duffy
- King’s Fertility, Fetal Medicine Research Institute, London, UK
- Institute for Women’s Health, University College London, London, UK
| | | | - E Benson
- Patient and Public Participation Group, Priority Setting Partnership for Infertility, University of Auckland, Auckland, New Zealand
| | - S Bhattacharya
- Institute of Applied Health Sciences, University of Aberdeen, Aberdeen, UK
| | - S Bhattacharya
- Institute of Applied Health Sciences, University of Aberdeen, Aberdeen, UK
| | - M Bofill
- Department of Obstetrics and Gynaecology, University of Auckland, Auckland, New Zealand
| | - K Brian
- Women’s Network, Royal College of Obstetricians and Gynecologists, London, UK
| | - B Collura
- Resolve: The National Infertility Association, VA, USA
| | - C Curtis
- School of Psychology, University of Waikato, Hamilton, New Zealand
| | - J L H Evers
- Centre for Reproductive Medicine and Biology, University Medical Centre Maastricht, Maastricht, The Netherlands
| | - R G Farquharson
- Department of Obstetrics and Gynaecology, Liverpool Women's NHS Foundation Trust, Liverpool, UK
| | | | - S Franik
- Department of Obstetrics and Gynaecology, Münster University Hospital, Münster, Germany
| | - L C Giudice
- Center for Research, Innovation and Training in Reproduction and Infertility, Center for Reproductive Sciences, University of California, San Francisco, CA, USA
- International Federation of Fertility Societies, Mount Royal, NJ, USA
| | - E Glanville
- Auckland District Health Board, Auckland, New Zealand
| | - M Hickey
- Department of Obstetrics and Gynaecology, University of Melbourne, Victoria, Australia
| | - A W Horne
- MRC Centre for Reproductive Health, University of Edinburgh, Edinburgh, UK
| | - M L Hull
- Robinson Research Institute and Adelaide Medical School, University of Adelaide, Adelaide, Australia
| | - N P Johnson
- Robinson Research Institute and Adelaide Medical School, University of Adelaide, Adelaide, Australia
| | - V Jordan
- Department of Obstetrics and Gynaecology, University of Auckland, Auckland, New Zealand
| | - Y Khalaf
- Department of Women and Children’s Health, Kings College London, London, UK
| | | | - R S Legro
- Department of Obstetrics and Gynaecology, Penn State College of Medicine, PA, USA
| | - S Lensen
- Department of Obstetrics and Gynaecology, University of Melbourne, Victoria, Australia
| | | | - D Mavrelos
- Reproductive Medicine Unit, University College Hospital, London, UK
| | - B W Mol
- Department of Obstetrics and Gynaecology, Monash University, Melbourne, Australia
| | - D E Morbeck
- Department of Obstetrics and Gynaecology, University of Auckland, Auckland, New Zealand
- Fertility Associates, Auckland, New Zealand
| | - H Nagels
- Cochrane Gynaecology and Fertility, University of Auckland, Auckland, New Zealand
| | - E H Y Ng
- Department of Obstetrics and Gynaecology, The University of Hong Kong, Hong Kong
- Shenzhen Key Laboratory of Fertility Regulation, The University of Hong Kong-Shenzhen Hospital, China
| | - C Niederberger
- Department of Urology, University of Illinois at Chicago College of Medicine, Chicago, IL, USA
| | | | - L Puscasiu
- ARC Fertility, Cupertino, CA, USA
- Institute for Women’s Health, University College London, London, UK
- Center for Reproductive Medicine, Amsterdam Reproduction and Development Institute, Amsterdam University Medical Centres, Amsterdam, The Netherlands
| | | | - L Sadler
- Department of Obstetrics and Gynaecology, University of Auckland, Auckland, New Zealand
- Auckland District Health Board, Auckland, New Zealand
| | - I Sarris
- King’s Fertility, Fetal Medicine Research Institute, London, UK
| | - M Showell
- Cochrane Gynaecology and Fertility, University of Auckland, Auckland, New Zealand
| | - J Stewart
- British Fertility Society, Middlesex, UK
| | - A Strandell
- Sahlgrenska Academy, Department of Obstetrics and Gynecology, University of Gothenburg, Sahlgrenska University Hospital, Göteborg, Sweden
| | | | - A Vail
- Centre for Biostatistics, University of Manchester, Manchester Academic Health Science Centre, Manchester, UK
| | - M van Wely
- Center for Reproductive Medicine, Amsterdam Reproduction and Development Institute, Amsterdam University Medical Centres, Amsterdam, The Netherlands
| | - M Vercoe
- Cochrane Gynaecology and Fertility, University of Auckland, Auckland, New Zealand
| | - N L Vuong
- Department of Obstetrics and Gynaecology, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - A Y Wang
- Australian Centre for Public and Population Health Research, Faculty of Health, University of Technology, Sydney, Australia
| | - R Wang
- Department of Obstetrics and Gynaecology, Monash University, Melbourne, Australia
| | - J Wilkinson
- Centre for Biostatistics, University of Manchester, Manchester Academic Health Science Centre, Manchester, UK
| | - K Wong
- School of Psychology, University of Waikato, Hamilton, New Zealand
| | - T Y Wong
- Auckland District Health Board, Auckland, New Zealand
| | - C M Farquhar
- Department of Obstetrics and Gynaecology, University of Auckland, Auckland, New Zealand
- Cochrane Gynaecology and Fertility, University of Auckland, Auckland, New Zealand
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12
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Benson E, Lolaico M, Tarasov Y, Gådin A, Högberg B. Evolutionary Refinement of DNA Nanostructures Using Coarse-Grained Molecular Dynamics Simulations. ACS Nano 2019; 13:12591-12598. [PMID: 31613092 PMCID: PMC7613751 DOI: 10.1021/acsnano.9b03473] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
In the past decade, DNA nanostructures have made the leap from small assemblies of a handful of oligonucleotides to megadalton objects assembled from hundreds or thousands of component DNA strands. Most DNA designs today are either lattice based with simple and reliable design tools or lattice free with a larger shape space but more challenging design and lower rigidity. In parallel with the development of DNA nanostructures, software packages for the simulation of nucleic acids have seen rapid development allowing for the simulation of the dynamics of full DNA nanostructure assemblies. Here, we implement an unsupervised software based on the coarse-grained molecular dynamics package oxDNA to simulate DNA origami structures and evaluate their rigidity. From this, the software autonomously produces mutant structures by adding or removing base pairs or modifying the positions of internal supports. These mutant structures are iteratively generated and evaluated by simulation to create an in silico evolution toward more rigid DNA nanostructures.
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13
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Benson E, Mohammed A, Rayneau-Kirkhope D, Gådin A, Orponen P, Högberg B. Effects of Design Choices on the Stiffness of Wireframe DNA Origami Structures. ACS Nano 2018; 12:9291-9299. [PMID: 30188123 DOI: 10.1021/acsnano.8b04148] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
DNA origami is a powerful method for the creation of 3D nanoscale objects, and in the past few years, interest in wireframe origami designs has increased due to their potential for biomedical applications. In DNA wireframe designs, the construction material is double-stranded DNA, which has a persistence length of around 50 nm. In this work, we study the effect of various design choices on the stiffness versus final size of nanoscale wireframe rods, given the constraints on origami designs set by the DNA origami scaffold size. An initial theoretical analysis predicts two competing mechanisms limiting rod stiffness, whose balancing results in an optimal edge length. For small edge lengths, the bending of the rod's overall frame geometry is the dominant factor, while the flexibility of individual DNA edges has a greater contribution at larger edge lengths. We evaluate our design choices through simulations and experiments and find that the stiffness of the structures increases with the number of sides in the cross-section polygon and that there are indications of an optimal member edge length. We also ascertain the effect of nicked DNA edges on the stiffness of the wireframe rods and demonstrate that ligation of the staple breakpoint nicks reduces the observed flexibility. Our simulations also indicate that the persistence length of wireframe DNA structures significantly decreases with increasing monovalent salt concentration.
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Affiliation(s)
- Erik Benson
- Department of Medical Biochemistry and Biophysics , Karolinska Institutet , SE-17177 Stockholm , Sweden
| | - Abdulmelik Mohammed
- Department of Computer Science , Aalto University , FI-00076 Aalto , Finland
| | - Daniel Rayneau-Kirkhope
- Aalto Science Institute, School of Science , Aalto University , FI-00076 Aalto , Finland
- Department of Applied Physics , Aalto University , FI-00076 Aalto , Finland
| | - Andreas Gådin
- Department of Medical Biochemistry and Biophysics , Karolinska Institutet , SE-17177 Stockholm , Sweden
| | - Pekka Orponen
- Department of Computer Science , Aalto University , FI-00076 Aalto , Finland
| | - Björn Högberg
- Department of Medical Biochemistry and Biophysics , Karolinska Institutet , SE-17177 Stockholm , Sweden
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14
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Vaney J, Benson E, Michiue Y, Mori T. Evaluation of the f-electron rare-earth copper telluride GdCu1+xTe2 as a thermoelectric material. J SOLID STATE CHEM 2017. [DOI: 10.1016/j.jssc.2017.08.018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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15
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Bosco A, Benson E, Högberg B, Teixeira A. DNA Nanotechnology for Understanding Ephrin Receptor Clustering. Biophys J 2017. [DOI: 10.1016/j.bpj.2016.11.182] [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: 11/30/2022] Open
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16
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Droege G, Barker K, Seberg O, Coddington J, Benson E, Berendsohn WG, Bunk B, Butler C, Cawsey EM, Deck J, Döring M, Flemons P, Gemeinholzer B, Güntsch A, Hollowell T, Kelbert P, Kostadinov I, Kottmann R, Lawlor RT, Lyal C, Mackenzie-Dodds J, Meyer C, Mulcahy D, Nussbeck SY, O'Tuama É, Orrell T, Petersen G, Robertson T, Söhngen C, Whitacre J, Wieczorek J, Yilmaz P, Zetzsche H, Zhang Y, Zhou X. The Global Genome Biodiversity Network (GGBN) Data Standard specification. Database (Oxford) 2016; 2016:baw125. [PMID: 27694206 PMCID: PMC5045859 DOI: 10.1093/database/baw125] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Accepted: 08/09/2016] [Indexed: 11/24/2022]
Abstract
Genomic samples of non-model organisms are becoming increasingly important in a broad range of studies from developmental biology, biodiversity analyses, to conservation. Genomic sample definition, description, quality, voucher information and metadata all need to be digitized and disseminated across scientific communities. This information needs to be concise and consistent in today’s ever-increasing bioinformatic era, for complementary data aggregators to easily map databases to one another. In order to facilitate exchange of information on genomic samples and their derived data, the Global Genome Biodiversity Network (GGBN) Data Standard is intended to provide a platform based on a documented agreement to promote the efficient sharing and usage of genomic sample material and associated specimen information in a consistent way. The new data standard presented here build upon existing standards commonly used within the community extending them with the capability to exchange data on tissue, environmental and DNA sample as well as sequences. The GGBN Data Standard will reveal and democratize the hidden contents of biodiversity biobanks, for the convenience of everyone in the wider biobanking community. Technical tools exist for data providers to easily map their databases to the standard. Database URL:http://terms.tdwg.org/wiki/GGBN_Data_Standard
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Affiliation(s)
- G Droege
- Botanic Garden and Botanical Museum Berlin-Dahlem, Freie Universität Berlin, Königin-Luise-Str. 6-8, Berlin 14195, Germany
| | - K Barker
- National Museum of Natural History, Smithsonian Institution, Washington, DC 20560, USA
| | - O Seberg
- Natural History Museum of Denmark, University of Copenhagen, Sølvgade 83, opg. S, Copenhagen DK-1307, Denmark
| | - J Coddington
- National Museum of Natural History, Smithsonian Institution, Washington, DC 20560, USA
| | - E Benson
- Damar Research Scientists, Damar, Drum Road, Cuparmuir, Fife KY15 5RJ, UK
| | - W G Berendsohn
- Botanic Garden and Botanical Museum Berlin-Dahlem, Freie Universität Berlin, Königin-Luise-Str. 6-8, Berlin 14195, Germany
| | - B Bunk
- Leibniz Institute DSMZ - German Collection of Microorganisms and Cell Cultures, Inhoffenstr. 7B, Braunschweig 38124, Germany
| | - C Butler
- National Museum of Natural History, Smithsonian Institution, Washington, DC 20560, USA
| | - E M Cawsey
- Australian National Wildlife Collection, CSIRO National Research Collections Australia, Canberra, Australia
| | - J Deck
- Berkeley Natural History Museums, University of California at Berkeley, Berkeley, CA 94720, USA
| | - M Döring
- Global Biodiversity Information Facility Secretariat, Universitetsparken 15, Copenhagen DK-2100, Denmark
| | - P Flemons
- Australian Museum, Sydney 2010, NSW, Australia
| | - B Gemeinholzer
- Systematic Botany, Justus Liebig University, Giessen 35392, Germany
| | - A Güntsch
- Botanic Garden and Botanical Museum Berlin-Dahlem, Freie Universität Berlin, Königin-Luise-Str. 6-8, Berlin 14195, Germany
| | - T Hollowell
- National Museum of Natural History, Smithsonian Institution, Washington, DC 20560, USA
| | - P Kelbert
- Botanic Garden and Botanical Museum Berlin-Dahlem, Freie Universität Berlin, Königin-Luise-Str. 6-8, Berlin 14195, Germany
| | - I Kostadinov
- Department of Life Sciences & Chemistry, Jacobs University Bremen gGmbH, Campus Ring 1, Bremen 28759, Germany
| | - R Kottmann
- Microbial Genomics and Bioinformatics Research Group, Max Planck Institute for Marine Microbiology, Celsiusstrasse 1, Bremen 28359, Germany
| | - R T Lawlor
- ARC-Net Applied Research on Cancer Centre, Department of Pathology and Diagnostics, University of Verona, Verona 37134, Italy
| | - C Lyal
- Natural History Museum, Cromwell Road, London SW7 5BD, UK
| | | | - C Meyer
- National Museum of Natural History, Smithsonian Institution, Washington, DC 20560, USA
| | - D Mulcahy
- National Museum of Natural History, Smithsonian Institution, Washington, DC 20560, USA
| | - S Y Nussbeck
- Department of Medical Informatics and UMG Biobank, University Medical Center Göttingen, Robert-Koch-Str. 40, Göttingen 37075, Germany
| | - É O'Tuama
- Global Biodiversity Information Facility Secretariat, Universitetsparken 15, Copenhagen DK-2100, Denmark
| | - T Orrell
- National Museum of Natural History, Smithsonian Institution, Washington, DC 20560, USA
| | - G Petersen
- Natural History Museum of Denmark, University of Copenhagen, Sølvgade 83, opg. S, Copenhagen DK-1307, Denmark
| | - T Robertson
- Global Biodiversity Information Facility Secretariat, Universitetsparken 15, Copenhagen DK-2100, Denmark
| | - C Söhngen
- Leibniz Institute DSMZ - German Collection of Microorganisms and Cell Cultures, Inhoffenstr. 7B, Braunschweig 38124, Germany
| | - J Whitacre
- National Museum of Natural History, Smithsonian Institution, Washington, DC 20560, USA
| | - J Wieczorek
- Museum of Vertebrate Zoology, University of California at Berkeley, Berkeley, CA 94720, USA
| | - P Yilmaz
- Microbial Genomics and Bioinformatics Research Group, Max Planck Institute for Marine Microbiology, Celsiusstrasse 1, Bremen 28359, Germany
| | - H Zetzsche
- Julius Kuehn-Institute (JKI), Federal Research Centre for Cultivated Plants, Institute for Resistance Research and Stress Tolerance, Erwin-Baur-Str. 27, Quedlinburg 06484, Germany
| | - Y Zhang
- China National GeneBank, BGI-Shenzhen, Shenzhen, Guangdong 518083, China
| | - X Zhou
- China National GeneBank, BGI-Shenzhen, Shenzhen, Guangdong 518083, China
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17
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Benson E, Mohammed A, Bosco A, Teixeira AI, Orponen P, Högberg B. Computer-Aided Production of Scaffolded DNA Nanostructures from Flat Sheet Meshes. Angew Chem Int Ed Engl 2016; 55:8869-72. [PMID: 27304204 PMCID: PMC6680348 DOI: 10.1002/anie.201602446] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [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: 03/09/2016] [Indexed: 01/19/2023]
Abstract
The use of DNA as a nanoscale construction material has been a rapidly developing field since the 1980s, in particular since the introduction of scaffolded DNA origami in 2006. Although software is available for DNA origami design, the user is generally limited to architectures where finding the scaffold path through the object is trivial. Herein, we demonstrate the automated conversion of arbitrary two‐dimensional sheets in the form of digital meshes into scaffolded DNA nanostructures. We investigate the properties of DNA meshes based on three different internal frameworks in standard folding buffer and physiological salt buffers. We then employ the triangulated internal framework and produce four 2D structures with complex outlines and internal features. We demonstrate that this highly automated technique is capable of producing complex DNA nanostructures that fold with high yield to their programmed configurations, covering around 70 % more surface area than classic origami flat sheets.
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Affiliation(s)
- Erik Benson
- Department of Medical Biochemistry and Biophysics, Karolinska Institutet, 17177, Stockholm, Sweden
| | | | - Alessandro Bosco
- Department of Medical Biochemistry and Biophysics, Karolinska Institutet, 17177, Stockholm, Sweden
| | - Ana I Teixeira
- Department of Medical Biochemistry and Biophysics, Karolinska Institutet, 17177, Stockholm, Sweden
| | - Pekka Orponen
- Department of Computer Science, Aalto University, 00076, Aalto, Finland
| | - Björn Högberg
- Department of Medical Biochemistry and Biophysics, Karolinska Institutet, 17177, Stockholm, Sweden.
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18
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Benson E, Mohammed A, Bosco A, Teixeira AI, Orponen P, Högberg B. Computer-Aided Production of Scaffolded DNA Nanostructures from Flat Sheet Meshes. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201602446] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Erik Benson
- Department of Medical Biochemistry and Biophysics; Karolinska Institutet; 17177 Stockholm Sweden
| | | | - Alessandro Bosco
- Department of Medical Biochemistry and Biophysics; Karolinska Institutet; 17177 Stockholm Sweden
| | - Ana I. Teixeira
- Department of Medical Biochemistry and Biophysics; Karolinska Institutet; 17177 Stockholm Sweden
| | - Pekka Orponen
- Department of Computer Science; Aalto University; 00076 Aalto Finland
| | - Björn Högberg
- Department of Medical Biochemistry and Biophysics; Karolinska Institutet; 17177 Stockholm Sweden
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19
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Mangat J, Morgan J, Benson E, Båth M, Lewis M, Reilly A. A STUDY OF THE IMAGE QUALITY OF COMPUTED TOMOGRAPHY ADAPTIVE STATISTICAL ITERATIVE RECONSTRUCTED BRAIN IMAGES USING SUBJECTIVE AND OBJECTIVE METHODS. Radiat Prot Dosimetry 2016; 169:92-99. [PMID: 27103646 DOI: 10.1093/rpd/ncw084] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Accepted: 02/26/2016] [Indexed: 06/05/2023]
Abstract
The recent reintroduction of iterative reconstruction in computed tomography has facilitated the realisation of major dose saving. The aim of this article was to investigate the possibility of achieving further savings at a site with well-established Adaptive Statistical iterative Reconstruction (ASiR™) (GE Healthcare) brain protocols. An adult patient study was conducted with observers making visual grading assessments using image quality criteria, which were compared with the frequency domain metrics, noise power spectrum and modulation transfer function. Subjective image quality equivalency was found in the 40-70% ASiR™ range, leading to the proposal of ranges for the objective metrics defining acceptable image quality. Based on the findings of both the patient-based and objective studies of the ASiR™/tube-current combinations tested, 60%/305 mA was found to fall within all, but one, of these ranges. Therefore, it is recommended that an ASiR™ level of 60%, with a noise index of 12.20, is a viable alternative to the currently used protocol featuring a 40% ASiR™ level and a noise index of 11.20, potentially representing a 16% dose saving.
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Affiliation(s)
- J Mangat
- Cardiac CT Department, Barts Heart Centre, Bartshealth NHS Trust, London, UK
| | - J Morgan
- Radiography Department, School of Health Sciences, City University, London, UK
| | - E Benson
- Medical Engineering and Physics Department, Kings College Hospital, London, UK
| | - M Båth
- Department of Medical Physics and Biomedical Engineering, Sahlgrenska University Hospital, Gothenburg, Sweden Department of Radiation Physics, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - M Lewis
- Medical Physics Department, Guy's and St. Thomas' Hospital, London, UK
| | - A Reilly
- Department of Radiotherapy Physics, Altnagelvin Hospital, Londonderry, UK
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Abstract
The high programmability of DNA origami has provided tools for precise manipulation of matter at the nanoscale. This manipulation of matter opens up the possibility to arrange functional elements for a diverse range of applications that utilize the nanometer precision provided by these structures. However, the realization of functionalized DNA origami still suffers from imperfect production methods, in particular in the purification step, where excess material is separated from the desired functionalized DNA origami. In this article we demonstrate and optimize two purification methods that have not previously been applied to DNA origami. In addition, we provide a systematic study comparing the purification efficacy of these and five other commonly used purification methods. Three types of functionalized DNA origami were used as model systems in this study. DNA origami was patterned with either small molecules, antibodies, or larger proteins. With the results of our work we aim to provide a guideline in quality fabrication of various types of functionalized DNA origami and to provide a route for scalable production of these promising tools.
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Affiliation(s)
- Alan Shaw
- Department of Neuroscience and Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden
| | - Erik Benson
- Department of Neuroscience and Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden
| | - Björn Högberg
- Department of Neuroscience and Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden
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Tolley K, Strickson A, Kay S, Benson E, Selby R. A Decision-Focused Mixed Treatment Comparison (MTC) of Alternative Dpp-4 Inhibitors (Dpp-4i's) Used in Combination With Metformin or a Sulfonylurea for the Treatment of Type 2 Diabetes Mellitus (T2DM). Value Health 2014; 17:A334. [PMID: 27200588 DOI: 10.1016/j.jval.2014.08.637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Affiliation(s)
- K Tolley
- Tolley Health Economics Ltd., Buxton, Derbyshire, UK
| | | | - S Kay
- Hardwick House, Buxton, Derbyshire, UK
| | - E Benson
- Hardwick House, Buxton, Derbyshire, UK
| | - R Selby
- Hardwick House, Buxton, Derbyshire, UK
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Williams M, Chakrabarti M, Benson E, Black A, Tarrant M, Moug S, Stechman, M, McCarthy K, Hewitt J. 51 * THE PREVALENCE OF COGNITIVE IMPAIRMENT MEASURED USING THE MONTREAL COGNITIVE ASSESSMENT METHOD (MOCA) IN AN OLDER ACUTE GENERAL SURGICAL POPULATION. Age Ageing 2014. [DOI: 10.1093/ageing/afu128.1] [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: 11/13/2022] Open
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Benson E, Betson F, Fuller BJ, Harding K, Kofanova O. Translating cryobiology principles into trans-disciplinary storage guidelines for biorepositories and biobanks: a concept paper. Cryo Letters 2013; 34:277-312. [PMID: 23812318] [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] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Low temperatures are used routinely to preserve diverse biospecimens, genetic resources and non-viable or viable biosamples for medical and clinical research in hospital-based biobanks and non-medical biorepositories, such as genebanks and culture, scientific, museum, and environmental collections. However, the basic knowledge underpinning preservation can sometimes be overlooked by practitioners who are unfamiliar with fundamental cryobiological principles which are more usually described in research literature rather than in quality and risk management documents. Whilst procedures vary, low temperature storage is a common requirement and reaching consensus as to how best it is applied could facilitate the entire biopreservation sector. This may be achieved by encouraging an understanding of cryoprotection theory and emphasizing the criticality of thermal events (glass transitions, ice nucleation, thawing) for sample integrity, functionality and stability. The objective of this paper is to inspire diverse biopreservation sectors to communicate more clearly about low temperature storage and, raise awareness of the importance of cryobiology principles to field newcomers and biopreservation practitioners, by considering how the principles may be translated into evidence-based guidelines for biobank and biorepository operations.
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Affiliation(s)
- E Benson
- Damar Research Scientists, Cuparmuir, Fife, Scotland, UK.
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Zhao YX, Shaw A, Zeng X, Benson E, Nyström AM, Högberg B. DNA origami delivery system for cancer therapy with tunable release properties. ACS Nano 2012; 6:8684-91. [PMID: 22950811 DOI: 10.1021/nn3022662] [Citation(s) in RCA: 362] [Impact Index Per Article: 30.2] [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
In the assembly of DNA nanostructures, the specificity of Watson-Crick base pairing is used to control matter at the nanoscale. Using this technology for drug delivery is a promising route toward the magic bullet concept, as it would allow the realization of complex assemblies that co-localize drugs, targeting ligands and other functionalities in one nanostructure. Anthracyclines' mechanism of action in cancer therapy is to intercalate DNA, and since DNA nanotechnology allows for such a high degree of customization, we hypothesized that this would allow us to tune the DNA nanostructures for optimal delivery of the anthracycline doxorubicin (Dox) to human breast cancer cells. We have tested two DNA origami nanostructures on three different breast cancer cell lines (MDA-MB-231, MDA-MB-468, and MCF-7). The different nanostructures were designed to exhibit varying degrees of global twist, leading to different amounts of relaxation in the DNA double-helix structure. By tuning the nanostructure design we are able to (i) tune the encapsulation efficiency and the release rate of the drug and (ii) increase the cytotoxicity and lower the intracellular elimination rate when compared to free Dox. Enhanced apoptosis induced by the delivery system in breast cancer cells was investigated using flow cytometry. The findings indicate that DNA origami nanostructures represent an efficient delivery system for Dox, resulting in high degrees of internalization and increased induction of programmed cell death in breast cancer cells. In addition, by designing the structures to exhibit different degrees of twist, we are able to rationally control and tailor the drug release kinetics.
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Affiliation(s)
- Yong-Xing Zhao
- Swedish Medical Nanoscience Center, Department of Neuroscience, Karolinska Institute, SE-171 77 Stockholm, Sweden
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Naidoo C, Benson E, Berjak P, Goveia M, Pammenter NW. Exploring the use of DMSO and ascorbic acid to promote shoot development by excised embryonic axes of recalcitrant seeds. Cryo Letters 2011; 32:166-174. [PMID: 21766146] [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] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Seeds of Trichilia dregeana, T. emetica and Protorhus longifolia are recalcitrant (desiccation-sensitive), hence cryopreservation is the only ex situ means feasible for long-term conservation of these germplasm. For cryopreservation of these species, the excised embryonic axis is the explant of choice due to their small size and higher tolerance to desiccation. However, for many species with seeds having fleshy cotyledons, shoot development fails to occur after excision, which has been attributed to a reactive oxygen species (ROS) burst during excision wounding. This is a critical limiting step in developing cryopreservation protocols for such species. In embryos of T. dregeana, T. emetica and P. longifolia, the cotyledonary insertions are in close proximity to the shoot apical meristem and oxidative stress upon excision of the axis from cotyledons has been consistently associated with shoot tip necrosis, which precludes shoot development. This study tested the effects of dimethyl sulphoxide (DMSO) pre-culture prior to complete removal of the cotyledons, and post-excision soaking in DMSO or in the antioxidant, ascorbic acid, on shoot development by axes of T. dregeana and P. longifolia. These treatments had a significant (P < 0.05) positive effect on shoot production with a 6 h DMSO pre-culture combined with a DMSO post-excision soak being optimal for promoting shoot production in 70 percent of the axes of T. dregeana and 60 percent of those of P. longifolia. Embryonic axes of T. emetica responded best to a 6 h DMSO pre-culture alone, with 55 percent of axes producing shoots. It was further shown that two different post-harvest developmental stages of T. dregeana axes differed significantly initially (P < 0.05) in their response to DMSO and ascorbic acid treatments.
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Affiliation(s)
- C Naidoo
- University of KwaZulu-Natal, Durban, South Africa
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Currie J, Ramsden B, McArthur C, Lunch J, Maruff P, Benson E, Perdices M, Cooper D. Hochauflösende Augenmotilitätsmessungen bei der Untersuchung neurologischer Komplikationen der HIV-1-Infektion. KLIN NEUROPHYSIOL 2008. [DOI: 10.1055/s-2008-1060841] [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: 10/21/2022]
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Nair-Roberts RG, Chatelain-Badie SD, Benson E, White-Cooper H, Bolam JP, Ungless MA. Stereological estimates of dopaminergic, GABAergic and glutamatergic neurons in the ventral tegmental area, substantia nigra and retrorubral field in the rat. Neuroscience 2008; 152:1024-31. [PMID: 18355970 PMCID: PMC2575227 DOI: 10.1016/j.neuroscience.2008.01.046] [Citation(s) in RCA: 404] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2007] [Revised: 12/14/2007] [Accepted: 01/11/2008] [Indexed: 02/06/2023]
Abstract
Midbrain dopamine neurons in the ventral tegmental area, substantia nigra and retrorubral field play key roles in reward processing, learning and memory, and movement. Within these midbrain regions and admixed with the dopamine neurons, are also substantial populations of GABAergic neurons that regulate dopamine neuron activity and have projection targets similar to those of dopamine neurons. Additionally, there is a small group of putative glutamatergic neurons within the ventral tegmental area whose function remains unclear. Although dopamine neurons have been intensively studied and quantified, there is little quantitative information regarding the GABAergic and glutamatergic neurons. We therefore used unbiased stereological methods to estimate the number of dopaminergic, GABAergic and glutamatergic cells in these regions in the rat. Neurons were identified using a combination of immunohistochemistry (tyrosine hydroxylase) and in situ hybridization (glutamic acid decarboxylase mRNA and vesicular glutamate transporter 2 mRNA). In substantia nigra pars compacta 29% of cells were glutamic acid decarboxylase mRNA-positive, 58% in the retrorubral field and 35% in the ventral tegmental area. There were further differences in the relative sizes of the GABAergic populations in subnuclei of the ventral tegmental area. Thus, glutamic acid decarboxylase mRNA-positive neurons represented 12% of cells in the interfascicular nucleus, 30% in the parabrachial nucleus, and 45% in the parainterfascicular nucleus. Vesicular glutamate transporter 2 mRNA-positive neurons were present in the ventral tegmental area, but not substantia nigra or retrorubral field. They were mainly confined to the rostro-medial region of the ventral tegmental area, and represented approximately 2-3% of the total neurons counted ( approximately 1600 cells). These results demonstrate that GABAergic and glutamatergic neurons represent large proportions of the neurons in what are traditionally considered as dopamine nuclei and that there are considerable heterogeneities in the proportions of cell types in the different dopaminergic midbrain regions.
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Affiliation(s)
- R G Nair-Roberts
- Department of Zoology, University of Oxford, South Parks Rd, Oxford, OX1 3PS, UK; Cardiff School of Biosciences, Cardiff University, Cardiff, CF10 3US, UK
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Benson E, Malone GW, Alphin RL, Dawson MD, Pope CR, Van Wicklen GL. Foam-based mass emergency depopulation of floor-reared meat-type poultry operations. Poult Sci 2007; 86:219-24. [PMID: 17234833 DOI: 10.1093/ps/86.2.219] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Current control strategies for avian influenza and other highly contagious poultry diseases often include quarantine, depopulation, and disposal of infected birds. For biosecurity reasons, on-farm depopulation and disposal methods are preferred. The options for mass depopulation are limited, as reported by the "2000 Report of the AVMA Panel on Euthanasia." Current depopulation techniques may have excessive labor requirements, are not appropriate for all house types, and may not be suitable for large-scale emergency implementation. A procedure has been developed that uses foam to rapidly form a blanket over the birds. The procedure requires relatively few people, can be performed in a variety of house types, and is compatible with in-house composting. Results from 2 experiments using foam for depopulation are presented in this paper. These studies have shown that foams are comparable to the CO(2) polyethylene tent procedure in time to death in small groups and that the foam is faster as group size increases. Adding CO(2) to the foam does not enhance its efficacy. Based on corticosterone levels, the study also showed that the foams are no more stressful than the CO(2) depopulation method. Necropsy and histological examination of birds indicated that blood was present to some degree in the trachea, syrinx, and bronchial tree in broilers subjected to foam with CO(2), foam without CO(2), and CO(2) polyethylene tent methods of depopulation. Foam caused a rapid onset of airway occlusion. In both foam- and CO(2)-euthanized broilers, lesions are consistent with anoxia or hypoxia. This suggests that foam acts by physically induced hypoxia, whereas CO(2) causes chemically induced hypoxia.
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Affiliation(s)
- E Benson
- Department of Bioresources Engineering, University of Delaware, Newark, Delaware 19716, USA.
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Benson E. Early detection of breast cancer. Edited by John K. Gohagan et al. 240 × 155 mm. Pp. 216 + x. Illustrated. 1982. New York: Praeger. £21.75. Br J Surg 2005. [DOI: 10.1002/bjs.1800700940] [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: 11/10/2022]
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Benson E. Clinics in oncology volume 1 number 3 breast cancer. Edited by Michael Baum. 235 × 155 mm. Pp. 647–955 + viii. Illustrated. 1982. Eastbourne: Sauders. £11.75. Br J Surg 2005. [DOI: 10.1002/bjs.1800700736] [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: 11/10/2022]
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Benson E. Hormone therapy. B. J. A. Furr. 230 × 155mm. Pp. 312 + viii. Illustrated. 1982. Eastbourne: Saunders. £10·75. Br J Surg 2005. [DOI: 10.1002/bjs.1800700426] [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: 11/08/2022]
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Hughes RAC, Wijdicks EFM, Barohn R, Benson E, Cornblath DR, Hahn AF, Meythaler JM, Miller RG, Sladky JT, Stevens JC. Practice parameter: Immunotherapy for Guillain-Barre syndrome: Report of the Quality Standards Subcommittee of the American Academy of Neurology. Neurology 2003; 61:736-40. [PMID: 14504313 DOI: 10.1212/wnl.61.6.736] [Citation(s) in RCA: 233] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE To provide an evidence-based statement to guide physicians in the management of Guillain-Barré syndrome (GBS). METHODS Literature search and derivation of evidence-based statements concerning the use of immunotherapy were performed. RESULTS Treatment with plasma exchange (PE) or IV immunoglobulin (IVIg) hastens recovery from GBS. Combining the two treatments is not beneficial. Steroid treatment given alone is not beneficial. RECOMMENDATIONS 1) PE is recommended for nonambulant adult patients with GBS who seek treatment within 4 weeks of the onset of neuropathic symptoms. PE should also be considered for ambulant patients examined within 2 weeks of the onset of neuropathic symptoms; 2) IVIg is recommended for nonambulant adult patients with GBS within 2 or possibly 4 weeks of the onset of neuropathic symptoms. The effects of PE and IVIg are equivalent; 3) Corticosteroids are not recommended for the management of GBS; 4) Sequential treatment with PE followed by IVIg, or immunoabsorption followed by IVIg is not recommended for patients with GBS; and 5) PE and IVIg are treatment options for children with severe GBS.
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Affiliation(s)
- R A C Hughes
- Department of Neuroimmunology, Guy's, King's and St. Thomas' School of Medicine, London, UK
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Evans JM, Turner BA, Bowen S, Ho AM, Sarver RW, Benson E, Parker CN. Inhibition of bacterial IF2 binding to fMet-tRNA((fMet)) by aminoglycosides. Bioorg Med Chem Lett 2003; 13:993-6. [PMID: 12643896 DOI: 10.1016/s0960-894x(03)00085-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Screening for inhibitors of bacterial protein synthesis Initiation Factor 2 (IF2) binding to N-formyl-Methionyl-transfer RNA (fMet-tRNA((fMet))) identified a series of aminoglycosides, that included amikacin and kanamycin A1, as inhibitors of this interaction. Subsequent testing revealed that aminoglycosides displayed a wide range of inhibitory activity. However, the failure of these compounds to completely inhibit binding of IF2 to fMet-tRNA((fMet)), the known ability of aminoglycosides to bind RNA, and the ability of the aminoglycosides to displace PicoGreen bound to fMet-tRNA((fMet)) suggest these compounds act by binding fMet-tRNA((fMet)). This hypothesis is further supported by isothermal denaturation experiments that failed to show any interaction between the IF2 protein and the aminoglycosides.
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Affiliation(s)
- J M Evans
- Global High Throughput Screening, Pharmacia Corp., Kalamazoo, MI 49007, USA
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Benson E. Rivers as urban landscapes: renaissance of the waterfront. Water Sci Technol 2002; 45:65-70. [PMID: 12171367] [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] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The Lake Ontario Waterfront Trail, currently stretching 350 kilometres along the shore of Lake Ontario, Canada, links 26 communities, 184 natural areas, 161 parks and promenades, 84 marinas and yacht clubs, hundreds of historic places, fairs, museums, art galleries and festivals. The Waterfront Trail is a catalyst for a new attitude and way of thinking towards the Lake Ontario waterfront and its watersheds - one that integrates ecological health, economic vitality and a sense of community. Since it was launched in 1995, the Trail has accompanied the protection of the most valued elements of the waterfront, and the transformation of under-utilized and environmentally degraded lands to vibrant places with businesses and jobs, parks and recreational facilities, green spaces, natural habitats and cultural venues and attractions. It is through the Trail that people have been mobilized to improve the waterfront as they have rediscovered the shoreline and understood the interconnections, both natural and cultural, that are so vital to its health and vitality. The Waterfront Regeneration Trust is the not-for-profit charitable organization that has been leading this large-scale greenway initiative over the past 10 years. While much has been accomplished, there remains much to do to enhance and expand the greenway. This presentation will focus on the lessons we have learned over the past decade in our involvement with more than 100 projects and what those lessons mean for the next decade of waterfront regeneration.
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Affiliation(s)
- E Benson
- Waterfront Regeneration Trust, Toronto, Canada.
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Puca AA, Daly MJ, Brewster SJ, Matise TC, Barrett J, Shea-Drinkwater M, Kang S, Joyce E, Nicoli J, Benson E, Kunkel LM, Perls T. A genome-wide scan for linkage to human exceptional longevity identifies a locus on chromosome 4. Proc Natl Acad Sci U S A 2001; 98:10505-8. [PMID: 11526246 PMCID: PMC56990 DOI: 10.1073/pnas.181337598] [Citation(s) in RCA: 249] [Impact Index Per Article: 10.8] [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] [Accepted: 07/02/2001] [Indexed: 12/14/2022] Open
Abstract
Substantial evidence supports the familial aggregation of exceptional longevity. The existence of rare families demonstrating clustering for this phenotype suggests that a genetic etiology may be an important component. Previous attempts at localizing loci predisposing for exceptional longevity have been limited to association studies of candidate gene polymorphisms. In this study, a genome-wide scan for such predisposing loci was conducted by using 308 individuals belonging to 137 sibships demonstrating exceptional longevity. By using nonparametric analysis, significant evidence for linkage was noted for chromosome 4 at D4S1564 with a MLS of 3.65 (P = 0.044). The analysis was corroborated by a parametric analysis (P = 0.052). These linkage results indicate the likelihood that there exists a gene, or genes, that exerts a substantial influence on the ability to achieve exceptional old age. Identification of the genes in humans that allow certain individuals to live to extreme old age should lead to insights on cellular pathways that are important to the aging process.
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Affiliation(s)
- A A Puca
- Howard Hughes Medical Institute, Genetics Division, Children's Hospital, and Harvard Medical School, Boston, MA 02215, USA.
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Affiliation(s)
- E Benson
- Department of Immunopathology, ICPMR, Westmead Hospital, NSW.
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Hughes J, Weston S, Bennetts B, Prasad M, Angulo R, Jaworskit R, Jolles S, Kossard S, Fox S, Benson E. The application of a PCR technique for the detection of immunoglobulin heavy chain gene rearrangements in fresh or paraffin-embedded skin tissue. Pathology 2001; 33:222-5. [PMID: 11358058] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/16/2023]
Abstract
Although detection of a clonal sequence of the heavy chain gene of immunoglobulin by the polymerase chain reaction (PCR) is frequently used to assess lymphoid infiltrates in skin biopsy specimens, there are no data on the sensitivity and specificity of this test in detecting clonal B cell populations. Having refined a PCR technique for the detection of immunoglobulin heavy chain (IgH) gene rearrangement in both fresh and formalin-fixed, paraffin-embedded skin samples, we undertook to define the role of this assay in the diagnostic setting. Thirty-one cases of cutaneous B cell lymphoma (CBCL), 19 cases of B cell pseudolymphoma (lymphocytoma cutis), 34 cases of benign lymphocytic infiltrates of the skin and one case of cutaneous T cell lymphoma (CTCL) were studied using the polymerase chain reaction assay. All biopsies were formalin-fixed, paraffin-embedded skin sections apart from 13 of the 31 CBCL specimens which were fresh skin specimens. DNA from the framework region 3 (FR3) sequence of the IgH genes was amplified to ascertain the presence of a clonal IgH gene rearrangement. The findings were correlated with histological and immunophenotyping results on all samples. The assay performed with 73% sensitivity and 100% specificity, comparable to results obtained examining fresh lymphoid tissue specimens from patients with B cell tumours. The results indicate that this technique is a useful tool in the work up of suspected CBCL and in differentiating between CBCL and mixed lymphocytic infiltrates, a clearly important distinction with regards to prognosis and treatment.
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Affiliation(s)
- J Hughes
- Department of Immunopathology, ICPMR, Westmead Hospital, NSW, Australia
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Protheroe D, Turvey K, Horgan K, Benson E, Bowers D, House A. Stressful life events and difficulties and onset of breast cancer: case-control study. BMJ 1999; 319:1027-30. [PMID: 10521192 PMCID: PMC28252 DOI: 10.1136/bmj.319.7216.1027] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
OBJECTIVE To determine the relation between stressful life events and difficulties and the onset of breast cancer. DESIGN Case-control study. SETTING 3 NHS breast clinics serving west Leeds. PARTICIPANTS 399 consecutive women, aged 40-79, attending the breast clinics who were Leeds residents. MAIN OUTCOME MEASURES Odds ratios of the risk of developing breast cancer after experiencing one or more severe life events, severe difficulties, severe 2 year non-personal health difficulties, or severe 2 year personal health difficulties in the 5 years before clinical presentation. RESULTS 332 (83%) women participated. Women diagnosed with breast cancer were no more likely to have experienced one or more severe life events (adjusted odds ratio 0.91, 95% confidence interval 0.47 to 1. 81; P=0.79); one or more severe difficulties (0.86, 0.41 to 1.81; P=0.69); a 2 year severe non-personal health difficulty (0.53, 0.12 to 2.31; P=0.4); or a 2 year severe personal health difficulty (2.73, 0.68 to 10.93; P=0.16) than women diagnosed with a benign breast lump. CONCLUSION These findings do not support the hypothesis that severe life events or difficulties are associated with onset of breast cancer.
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Affiliation(s)
- D Protheroe
- Department of Liaison Psychiatry, Leeds General Infirmary, Leeds LS1 3EX.
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Savige J, Gillis D, Benson E, Davies D, Esnault V, Falk RJ, Hagen EC, Jayne D, Jennette JC, Paspaliaris B, Pollock W, Pusey C, Savage CO, Silvestrini R, van der Woude F, Wieslander J, Wiik A. International Consensus Statement on Testing and Reporting of Antineutrophil Cytoplasmic Antibodies (ANCA). Am J Clin Pathol 1999; 111:507-13. [PMID: 10191771 DOI: 10.1093/ajcp/111.4.507] [Citation(s) in RCA: 361] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Antineutrophil cytoplasmic antibody (ANCA) tests are used to diagnose and monitor inflammatory activity in the primary systemic small vessel vasculitides. ANCA is best demonstrated in these diseases by using a combination of indirect immunofluorescence (IIF) of normal peripheral blood neutrophils and enzyme-linked immunosorbent assays (ELISAs) that detect ANCA specific for proteinase 3 (PR3) or myeloperoxidase (MPO). For ANCA testing in "new" patients, IIF must be performed on all serum samples. Serum samples containing ANCA, any other cytoplasmic fluorescence, or an antinuclear antibody (ANA) that results in homogeneous or peripheral nuclear fluorescence then should be tested in ELISAs for PR3-ANCA and MPO-ANCA. Optimally, ELISAs for PR3-ANCA and MPO-ANCA should be performed on all serum samples. Inclusion of the most recent positive sample in the IIF or ELISA may help demonstrate a change in antibody level. Reports should use recommended terms. Any report of positive neutrophil fluorescence issued before the ELISA results are available should indicate that positive fluorescence alone is not specific for the diagnosis of Wegener granulomatosis or microscopic polyangiitis and that decisions about treatment should not be based solely on the ANCA results.
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Affiliation(s)
- J Savige
- University Department of Medicine, Austin and Repatriation Medical Centre, Heidelberg, Victoria, Australia
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Manoach D, Gollub R, Searl M, Benson E, Goff D, Rauch S, Weisskoff R, Saper C. Schizophrenics are not hypofrontal on a working memory task as measured by fMRI. Neuroimage 1998. [DOI: 10.1016/s1053-8119(18)31726-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
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Howard TE, Marusa M, Boisza J, Young A, Sequeira J, Channell C, Guy C, Benson E, Duncan A. The prothrombin gene 3'-untranslated region mutation is frequently associated with factor V Leiden in thrombophilic patients and shows ethnic-specific variation in allele frequency. Blood 1998; 91:1092. [PMID: 9446674] [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] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
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Ostrowski J, Quinn C, Benson E. Breast cancer metastatic to the gastrointestinal tract. Oncol Rep 1996; 3:589-91. [PMID: 21594419 DOI: 10.3892/or.3.3.589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The clinical course of patients with breast cancer is often protracted with metastases presenting a considerable time after initial diagnosis and surgical intervention. Whilst specific common patterns of tumour dissemination may be anticipated and readily recognised, more unusual sites may present with confusing symptoms seemingly unconnected to the breast primary. This report documents two cases of primary breast cancer metastatic to the gastrointestinal tract presenting to one surgical unit.
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Affiliation(s)
- J Ostrowski
- LEEDS GEN INFIRM,UNITED LEEDS TEACHING HOSP NHS TRUST,DEPT SURG,LEEDS LS1 3EX,W YORKSHIRE,ENGLAND
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Maruff P, Malone V, McArthur-Jackson C, Mulhall B, Benson E, Currie J. Abnormalities of visual spatial attention in HIV infection and the HIV-associated dementia complex. J Neuropsychiatry Clin Neurosci 1995; 7:325-33. [PMID: 7580192 DOI: 10.1176/jnp.7.3.325] [Citation(s) in RCA: 20] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Covert orienting of visuospatial attention (COVAT) was examined in 88 homosexual or bisexual men: 12 with mild HIV-associated dementia complex (ADC), 30 neurologically intact with AIDS (NI-AIDS), 23 asymptomatic HIV+ (HIV+ASX), and 23 HIV-negative control subjects. In mild ADC, COVAT was normal for spatial but impaired for nonspatial cues; 17% of NI-AIDS and HIV+ASX subjects had similar COVAT impairment patterns and also showed cognitive deficits. HIV+ subjects with normal COVAT showed normal cognitive performance. Impairment of nonspatial attentional processing in the ADC subjects and subgroups of the neurologically intact HIV+ subjects may reflect early subcortical dysfunction caused by HIV infection. COVAT assessment may be sensitive for detection of early subclinical neurological impairment in HIV infection.
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Affiliation(s)
- P Maruff
- Neurophysiology and Neurovisual Research Unit, Mental Health Research Institute of Victoria, Parkville, Australia
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Bradstock K, Matthews J, Benson E, Page F, Bishop J. Prognostic value of immunophenotyping in acute myeloid leukemia. Australian Leukaemia Study Group. Blood 1994; 84:1220-5. [PMID: 8049437] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
The diagnostic and prognostic value of immunophenotyping with 18 murine monoclonal antibodies (MoAbs) to a variety of leukocyte differentiation antigens was assessed in 168 adults aged 15 to 60 years with acute myeloid leukemia (AML). Patients were entered on the multicentre Australian Leukaemia Study Group M4 protocol, and were randomized to receive either standard or high-dose Ara-C together with daunorubicin and etoposide as induction chemotherapy, followed by standard consolidation and maintenance therapy. Diagnostic bone marrow aspirate (152 cases) or peripheral blood samples (16) were analyzed by indirect immunofluorescence and flow cytometry. MoAbs used were directed at myeloid (CD11b, CD13, CD14, CD15, CD33, CD41), lymphoid (CD2, CD3, CD7, CD9, CD10, CD19), or stem cell (HLA-DR, CD34, c-kit receptor) antigens, as well as the leukocyte integrins CD18 and CD49e, and the transferrin receptor CD71. Of the myeloid markers, CD13 and CD33 were the most useful diagnostically (71% and 79% of cases positive, respectively), with CD11b, CD14, and CD15 less commonly positive. A minority of cases expressed lymphoid antigens, either T cell (CD2 16%, CD3 7%, CD7 28%) or B cell (CD10 2%, CD19 7%). CD34 was detected on 42% and c-kit receptor on 48%. When patients were analyzed for response to treatment, CD2, CD9, and CD14 were significantly associated with complete remission rate: cases expressing these antigens had a poorer response than negative cases. In univariate analysis, CD11b+ cases had shorter periods of remission (relative risk of relapse, 2.33; P = .003) and shorter survival (relative death rate, 1.91; P = .006). In multivariate analysis, adjusting for other prognostic factors, CD9 and CD11b were significantly predictive of shorter survival. No other marker had a significant predictive effect. We conclude that myeloid MoAbs are useful in confirming the diagnosis of AML, but their prognostic value may be limited to CD11b. Lymphoid antigen expression is a consistent phenomenon in a minority of cases of AML, but appears to have little clinical significance.
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Affiliation(s)
- K Bradstock
- Department of Haematology, Westmead Hospital, New South Wales, Australia
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Maruff P, Currie J, Malone V, McArthur-Jackson C, Mulhall B, Benson E. Neuropsychological characterization of the AIDS dementia complex and rationalization of a test battery. Arch Neurol 1994; 51:689-95. [PMID: 8018042 DOI: 10.1001/archneur.1994.00540190069017] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
OBJECTIVE To define the neuropsychological deficits present in mild human immunodeficiency virus type 1 (HIV-1) associated with the acquired immunodeficiency syndrome (AIDS) dementia complex (ADC) and to develop a rational neuropsychological test battery for its diagnosis. DESIGN Survey. SETTING Subjects were recruited from large metropolitan hospital outpatient clinics and were all living independently in the general community. PATIENTS Three volunteer samples of homosexual-bisexual men: (1) 15 patients who met clinical and research criteria for mild ADC; (2) 27 HIV-seronegative (HIV-) controls; and (3) 17 patients with AIDS who were neurologically intact (NI-AIDS) who were matched with the ADC subjects by CD4 lymphocyte counts for severity of systemic HIV disease. MAIN OUTCOME MEASURES Neuropsychological test performance; z score comparisons were made with the HIV-control group using 2.25-SD cutoffs for abnormality. RESULTS Compared with NI-AIDS subjects, performance of patients with mild ADC was markedly worse in the cognitive areas of executive function, memory, and complex attention but not in affect or the cognitive areas of simple motor function, orientation, language, or visuospatial construction. Within the areas of executive function, memory, and complex attention, all of the HIV-controls and 95% of the NI-AIDS subjects had impaired test performance in a maximum of one area only. In marked contrast, 14 (93%) of the 15 patients with mild ADC had abnormal test performances in all three of these cognitive areas. Using a criterion of abnormal performance in at least two of the cognitive areas of executive function, memory, and complex attention, all patients with mild ADC could be differentiated from HIV-controls with 100% sensitivity and specificity and from NI-AIDS subjects matched for disease severity by CD4 lymphocyte count with 100% sensitivity and 94% specificity, which increased to 100% with the requirement of impairment in all three cognitive areas. CONCLUSIONS If time constraints or patient compliance limit neuropsychometric testing, examination to detect mild ADC first should be directed to the areas of executive function, memory, and complex attention. This pattern of neuropsychological deficits in patients with mild ADC is suggestive of subcortical dementia.
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Affiliation(s)
- P Maruff
- Neurophysiology and Neurovisual Research Unit, Mental Health Research Institute of Victoria, Parkville, Australia
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Friedenreich K, Benson E. Ten commandments without Mr. DeMille. Adm Radiol 1994; 13:42-5. [PMID: 10136527] [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: 02/11/2023]
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Maruff P, Wood S, Currie J, McArthur-Jackson C, Malone V, Benson E. Computer-administered visual analogue mood scales: rapid and valid assessment of mood in HIV positive individuals. Psychol Rep 1994; 74:39-42. [PMID: 8153233 DOI: 10.2466/pr0.1994.74.1.39] [Citation(s) in RCA: 20] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Studies of cognition in patients with the human immunodeficiency virus must take into account the effects of mood. Standardised mood-rating questionnaires are oftentimes consuming and fatiguing for such patients and so may be omitted from experiments. Visual analogue rating scales for affective state are rapidly administered and are quite acceptable to subjects. In 64 HIV seropositive homosexual or bisexual males, measures of anxiety and depression derived from two computer-administered visual analogue scales were compared with anxiety and depression ratings from the Spielberger State-Trait Anxiety Inventory and the Center for Epidemiological Studies-Depression. Analogue ratings of anxiety correlated .80 with STAI State anxiety and .58 with STAI Trait anxiety measures and analogue ratings of depression correlated .78 with CES-Depression measures. Analogue ratings may differentiate situational anxiety and depression more effectively and so are valid tools in assessment of anxiety and depression in HIV seropositive subjects. These may be of particular value when limitations of time or patient illness require a rapid assessment of mood variables in neuropsychiatric research.
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Affiliation(s)
- P Maruff
- Neurophysiology and Neurovisual Research Unit, Mental Health Research Institute of Victoria, Parkville, Australia
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Affiliation(s)
- M D Varney
- Tissue Typing Laboratory, Royal Melbourne Hospital, Victoria, Australia
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