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Shimizu H, Hosseini-Alghaderi S, Woodcock SA, Baron M. Alternative mechanisms of Notch activation by partitioning into distinct endosomal domains. J Cell Biol 2024; 223:e202211041. [PMID: 38358349 PMCID: PMC10868400 DOI: 10.1083/jcb.202211041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 11/17/2023] [Accepted: 01/30/2024] [Indexed: 02/16/2024] Open
Abstract
Different membrane microdomain compositions provide unique environments that can regulate signaling receptor function. We identify microdomains on the endosome membrane of Drosophila endosomes, enriched in lipid-raft or clathrin/ESCRT-0, which are associated with Notch activation by distinct, ligand-independent mechanisms. Transfer of Notch between microdomains is regulated by Deltex and Suppressor of deltex ubiquitin ligases and is limited by a gate-keeper role for ESCRT complexes. Ubiquitination of Notch by Deltex recruits it to the clathrin/ESCRT-0 microdomain and enhances Notch activation by an ADAM10-independent/TRPML-dependent mechanism. This requirement for Deltex is bypassed by the downregulation of ESCRT-III. In contrast, while ESCRT-I depletion also activates Notch, it does so by an ADAM10-dependent/TRPML-independent mechanism and Notch is retained in the lipid raft-like microdomain. In the absence of such endosomal perturbation, different activating Notch mutations also localize to different microdomains and are activated by different mechanisms. Our findings demonstrate the interplay between Notch regulators, endosomal trafficking components, and Notch genetics, which defines membrane locations and activation mechanisms.
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Affiliation(s)
- Hideyuki Shimizu
- School of Biological Sciences, Manchester Academic Health Science Centre, University of Manchester, Manchester, UK
| | - Samira Hosseini-Alghaderi
- School of Biological Sciences, Manchester Academic Health Science Centre, University of Manchester, Manchester, UK
| | - Simon A. Woodcock
- School of Biological Sciences, Manchester Academic Health Science Centre, University of Manchester, Manchester, UK
| | - Martin Baron
- School of Biological Sciences, Manchester Academic Health Science Centre, University of Manchester, Manchester, UK
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2
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Hayes H, Stokes J, Sutton M, Meacock R. How do hospitals respond to payment unbundling for diagnostic imaging of suspected cancer patients? Health Econ 2024; 33:823-843. [PMID: 38233916 DOI: 10.1002/hec.4804] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Revised: 01/05/2024] [Accepted: 01/08/2024] [Indexed: 01/19/2024]
Abstract
Payments for some diagnostic scans undertaken in outpatient settings were unbundled from Diagnosis Related Group based payments in England in April 2013 to address under-provision. Unbundled scans attracted additional payments of between £45 and £748 directly following the reform. We examined the effect on utilization of these scans for patients with suspected cancer. We also explored whether any detected effects represented real increases in use of scans or better coding of activity. We applied difference-in-differences regression to patient-level data from Hospital Episodes Statistics for 180 NHS hospital Trusts in England, between April 2010 and March 2018. We also explored heterogeneity in recorded use of scans before and after the unbundling at hospital Trust-level. Use of scans increased by 0.137 scans per patient following unbundling, a 134% relative increase. This increased annual national provider payments by £79.2 million. Over 15% of scans recorded after the unbundling were at providers that previously recorded no scans, suggesting some of the observed increase in activity reflected previous under-coding. Hospitals recorded substantial increases in diagnostic imaging for suspected cancer in response to payment unbundling. Results suggest that the reform also encouraged improvements in recording, so the real increase in testing is likely lower than detected.
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Affiliation(s)
- Helen Hayes
- Office of Health Economics (OHE), London, UK
- Health Organisation, Policy and Economics (HOPE), Centre for Primary Care & Health Services Research, School of Health Sciences, The University of Manchester, Manchester, UK
| | - Jonathan Stokes
- Health Organisation, Policy and Economics (HOPE), Centre for Primary Care & Health Services Research, School of Health Sciences, The University of Manchester, Manchester, UK
- MRC/CSO Social & Public Health Sciences Unit, School of Health and Wellbeing, University of Glasgow, Glasgow, UK
| | - Matt Sutton
- Health Organisation, Policy and Economics (HOPE), Centre for Primary Care & Health Services Research, School of Health Sciences, The University of Manchester, Manchester, UK
- Centre for Health Economics, Monash University, Melbourne, Victoria, Australia
| | - Rachel Meacock
- Health Organisation, Policy and Economics (HOPE), Centre for Primary Care & Health Services Research, School of Health Sciences, The University of Manchester, Manchester, UK
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3
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Hilton TA, Leach AG, McKay AP, Watson AJB. Accessing Rare α-Heterocyclic Aziridines via Brønsted Acid-catalyzed Michael Addition/Annulation: Scope, Limitations, and Mechanism. Chemistry 2024; 30:e202303993. [PMID: 38315627 DOI: 10.1002/chem.202303993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Revised: 02/05/2024] [Accepted: 02/05/2024] [Indexed: 02/07/2024]
Abstract
We report an approach to the diastereoselective synthesis of 1,2-disubstituted heterocyclic aziridines. A Brønsted acid-catalyzed conjugate addition of anilines to trisubstituted heterocyclic chloroalkenes provides an intermediate 1,2-chloroamine. Diastereocontrol was found to vary significantly with solvent selection, with computational modelling confirming selective, spontaneous fragmentation in the presence of trace acids, proceeding through a pseudo-cyclic, protonated intermediate and transition state. These chloroamines can then be converted to the aziridine by treatment with LiHMDS with high stereochemical fidelity. This solvent-induced stereochemical enrichment thereby enables an efficient route to rare cis-aziridines with high dr. The scope, limitations, and mechanistic origins of selectivity are also presented.
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Affiliation(s)
- Timothy A Hilton
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews, Fife, KY16 9ST, U.K
| | - Andrew G Leach
- School of Health Sciences, University of Manchester, Oxford Road, Manchester, M13 9PL, U.K
| | - Aidan P McKay
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews, Fife, KY16 9ST, U.K
| | - Allan J B Watson
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews, Fife, KY16 9ST, U.K
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4
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Allan S, Ward T, Eisner E, Bell IH, Cella M, Chaudhry IB, Torous J, Kiran T, Kabir T, Priyam A, Richardson C, Reininghaus U, Schick A, Schwannauer M, Syrett S, Zhang X, Bucci S. Adverse Events Reporting in Digital Interventions Evaluations for Psychosis: A Systematic Literature Search and Individual Level Content Analysis of Adverse Event Reports. Schizophr Bull 2024:sbae031. [PMID: 38581410 DOI: 10.1093/schbul/sbae031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 04/08/2024]
Abstract
BACKGROUND Digital health interventions (DHIs) have significant potential to upscale treatment access to people experiencing psychosis but raise questions around patient safety. Adverse event (AE) monitoring is used to identify, record, and manage safety issues in clinical trials, but little is known about the specific content and context contained within extant AE reports. This study aimed to assess current AE reporting in DHIs. STUDY DESIGN A systematic literature search was conducted by the iCharts network (representing academic, clinical, and experts by experience) to identify trials of DHIs in psychosis. Authors were invited to share AE reports recorded in their trials. A content analysis was conducted on the shared reports. STUDY RESULTS We identified 593 AE reports from 18 DHI evaluations, yielding 19 codes. Only 29 AEs (4.9% of total) were preidentified by those who shared AEs as being related to the intervention or trial procedures. While overall results support the safety of DHIs, DHIs were linked to mood problems and psychosis exacerbation in a few cases. Additionally, 27% of studies did not report information on relatedness for all or at least some AEs; 9.6% of AE reports were coded as unclear because it could not be determined what had happened to participants. CONCLUSIONS The results support the safety of DHIs, but AEs must be routinely monitored and evaluated according to best practice. Individual-level analyses of AEs have merit to understand safety in this emerging field. Recommendations for best practice reporting in future studies are provided.
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Affiliation(s)
- Stephanie Allan
- School of Health and Wellbeing, University of Glasgow, Glasgow, UK
| | - Thomas Ward
- School of Mental Health and Psychological Sciences, Department of Psychology Institute of Psychiatry, Psychology & Neuroscience, King's College London, London, UK
- South London & Maudsley NHS Foundation Trust, London, UK
| | - Emily Eisner
- Division of Psychology and Mental Health, School of Health Sciences, Faculty of Biology, Medicine and Health, Manchester Academic Health Sciences, The University of Manchester, Manchester, UK
| | - Imogen H Bell
- Orygen, Parkville, VIC, Australia
- Centre for Youth Mental Health, University of Melbourne, Parkville, VIC, Australia
| | - Matteo Cella
- School of Mental Health and Psychological Sciences, Department of Psychology Institute of Psychiatry, Psychology & Neuroscience, King's College London, London, UK
- South London & Maudsley NHS Foundation Trust, London, UK
| | - Imran B Chaudhry
- Division of Psychology and Mental Health, School of Health Sciences, Faculty of Biology, Medicine and Health, Manchester Academic Health Sciences, The University of Manchester, Manchester, UK
- Ziauddin University and Hospital Karachi, Karachi, Pakistan
- Pakistan Institute of Living & Learning, Karachi, Pakistan
| | - John Torous
- Department of Psychiatry, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - Tayyeba Kiran
- Centre for Youth Mental Health, University of Melbourne, Parkville, VIC, Australia
| | - Thomas Kabir
- Department of Psychiatry, University of Oxford, Oxford, UK
| | - Aansha Priyam
- Division of Psychology and Mental Health, School of Health Sciences, Faculty of Biology, Medicine and Health, Manchester Academic Health Sciences, The University of Manchester, Manchester, UK
| | - Cara Richardson
- Division of Psychology and Mental Health, School of Health Sciences, Faculty of Biology, Medicine and Health, Manchester Academic Health Sciences, The University of Manchester, Manchester, UK
| | - Ulrich Reininghaus
- School of Mental Health and Psychological Sciences, Department of Psychology Institute of Psychiatry, Psychology & Neuroscience, King's College London, London, UK
- Department of Public Mental Health, Central Institute of Mental Health, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Anita Schick
- Department of Psychiatry, University of Oxford, Oxford, UK
- Department of Public Mental Health, Central Institute of Mental Health, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Matthias Schwannauer
- Department of Clinical and Health Psychology, School of Health in Social Science, University of Edinburgh, Edinburgh, UK
| | - Suzy Syrett
- School of Health and Wellbeing, University of Glasgow, Glasgow, UK
| | - Xiaolong Zhang
- Division of Psychology and Mental Health, School of Health Sciences, Faculty of Biology, Medicine and Health, Manchester Academic Health Sciences, The University of Manchester, Manchester, UK
| | - Sandra Bucci
- Division of Psychology and Mental Health, School of Health Sciences, Faculty of Biology, Medicine and Health, Manchester Academic Health Sciences, The University of Manchester, Manchester, UK
- Greater Manchester Mental Health NHS Foundation Trust, Manchester, UK
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5
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Das A, Myers DL, Ganesh V, Greaney MF. Cascade Aryne Aminoarylation for Biaryl Phenol Synthesis. Org Lett 2024; 26:2612-2616. [PMID: 38512156 PMCID: PMC11002935 DOI: 10.1021/acs.orglett.4c00624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2024] [Revised: 03/08/2024] [Accepted: 03/15/2024] [Indexed: 03/22/2024]
Abstract
We describe a transition metal-free approach to hindered 3-amino-2-aryl phenols through a cascade nucleophilic addition / Smiles-Truce rearrangement of a functionalized Kobayashi aryne precursor. Under anionic conditions, secondary alkyl amines add to the aryne intermediate to set up an aryl transfer from a neighboring sulfonate group. The use of a sulfonate, rather than the more typical sulfonamide, enables access to phenolic biaryl products that are important motifs in natural products and pharmaceuticals.
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Affiliation(s)
- Aniruddha Das
- Department
of Chemistry, University of Manchester, Oxford Rd, Manchester, M13 9PL, U.K.
- Department
of Chemistry, Indian Institute of Technology
Kharagpur, West Bengal-721302, India
| | - Danielle L. Myers
- Department
of Chemistry, University of Manchester, Oxford Rd, Manchester, M13 9PL, U.K.
| | - Venkataraman Ganesh
- Department
of Chemistry, Indian Institute of Technology
Kharagpur, West Bengal-721302, India
| | - Michael F. Greaney
- Department
of Chemistry, University of Manchester, Oxford Rd, Manchester, M13 9PL, U.K.
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6
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Geue N, Winpenny REP, Barran PE. Ion Mobility Mass Spectrometry for Large Synthetic Molecules: Expanding the Analytical Toolbox. J Am Chem Soc 2024; 146:8800-8819. [PMID: 38498971 PMCID: PMC10996010 DOI: 10.1021/jacs.4c00354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Revised: 02/29/2024] [Accepted: 03/01/2024] [Indexed: 03/20/2024]
Abstract
Understanding the composition, structure and stability of larger synthetic molecules is crucial for their design, yet currently the analytical tools commonly used do not always provide this information. In this perspective, we show how ion mobility mass spectrometry (IM-MS), in combination with tandem mass spectrometry, complementary techniques and computational methods, can be used to structurally characterize synthetic molecules, make and predict new complexes, monitor disassembly processes and determine stability. Using IM-MS, we present an experimental and computational framework for the analysis and design of complex molecular architectures such as (metallo)supramolecular cages, nanoclusters, interlocked molecules, rotaxanes, dendrimers, polymers and host-guest complexes.
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Affiliation(s)
- Niklas Geue
- Michael
Barber Centre for Collaborative Mass Spectrometry, Manchester Institute
of Biotechnology, Department of Chemistry, The University of Manchester, 131 Princess Street, Manchester M1 7DN, U.K.
| | - Richard E. P. Winpenny
- Department
of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Perdita E. Barran
- Michael
Barber Centre for Collaborative Mass Spectrometry, Manchester Institute
of Biotechnology, Department of Chemistry, The University of Manchester, 131 Princess Street, Manchester M1 7DN, U.K.
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7
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Correction to: The prevalence of the failure of fixed orthodontic bonded retainers: a systematic review and meta-analysis. Eur J Orthod 2024; 46. [PMID: 38345244 DOI: 10.1093/ejo/cjae007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2024]
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8
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Brown LJE, Fineczko J, O'Neill B, Geast M, Morton K, Stanyon D, Bharucha H, Chu CH. The importance of instant impact: What matters to long-term care staff and residents about taking part in research? J Am Geriatr Soc 2024. [PMID: 38514182 DOI: 10.1111/jgs.18886] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Revised: 02/18/2024] [Accepted: 02/28/2024] [Indexed: 03/23/2024]
Affiliation(s)
- Laura J E Brown
- Manchester Centre for Health Psychology, Division of Psychology and Mental Health, School of Health Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester Academic Health Sciences Centre, Manchester, UK
| | - Julia Fineczko
- Lawrence S. Bloomberg Faculty of Nursing, University of Toronto, Toronto, Ontario, Canada
| | - Bill O'Neill
- Kensington Health Centre, Toronto, Ontario, Canada
| | | | - Kala Morton
- Lavender Hills, Millennium Care, Ramsbottom, Bury, UK
| | - David Stanyon
- Resident Leader, Ontario Association of Residents' Councils, Resident, Kensington Gardens, Toronto, Ontario, Canada
| | - Haniya Bharucha
- Lawrence S. Bloomberg Faculty of Nursing, University of Toronto, Toronto, Ontario, Canada
| | - Charlene H Chu
- Lawrence S. Bloomberg Faculty of Nursing, University of Toronto, Toronto, Ontario, Canada
- Cross-appointed, Rehabilitation Sciences Institute, University of Toronto, Toronto, Ontario, Canada
- Cross-Appointed, Institute for Life Course and Aging, University of Toronto, Toronto, Ontario, Canada
- Affiliate Scientist, KITE-Toronto Rehabilitation Institute, University Health Network, Toronto, Ontario, Canada
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9
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Gillibrand S, Kapadia D, Watkinson R, Issa B, Kwaku-Odoi C, Sanders C. Marginalisation and distrust in the context of the COVID-19 vaccination programme: experiences of communities in a northern UK city region. BMC Public Health 2024; 24:853. [PMID: 38504230 PMCID: PMC10953068 DOI: 10.1186/s12889-024-18308-0] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Accepted: 03/07/2024] [Indexed: 03/21/2024] Open
Abstract
BACKGROUND There are clear inequalities in COVID - 19 vaccination rates amongst marginalised groups, with lower rates for some minoritised ethnic and religious groups, younger people, those living in more deprived areas, and with lower socio-economic status. Existing research focuses on psychological and socio-economic factors that influence vaccine uptake and does not explore broader social and historical contexts. Understanding inequalities in COVID-19 vaccine uptake requires a critical examination of the drivers of, and barriers to, vaccination. METHODS We present findings from a co-designed qualitative research study undertaken during the COVID-19 pandemic. Focus groups and interviews were used to examine the context underpinning responses to the COVID-19 vaccination in Greater Manchester, particularly focussing on experiences of marginalisation. Thematic framework analysis was used to analyse the data. RESULTS We found that the public's responses to the COVID-19 vaccination programme are intertwined with a longstanding history of institutional distrust and disenfranchisement, resulting from experiences of marginalisation and social inequalities. This was exacerbated further by the disproportionate impacts of the COVID-19 pandemic on minoritised ethnic groups, younger people, and those with existing health conditions. CONCLUSIONS Histories of structural inequalities experienced by minoritised groups invoked feelings of suspicion and scepticism at the motivations of the agencies behind the vaccination rollout. This highlights the need for a contextualised analysis of attitudes to vaccines, considering pre-existing inequalities, which may be especially relevant for conceptualising public responses to the vaccination programme. Finally, our study shows the important ways in which public (dis)trust can impact public health policies. We recommend this should be incorporated into responses to future public health crises.
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Affiliation(s)
- Stephanie Gillibrand
- Centre for Primary Care & Health Services Research, School of Health Sciences, Faculty of Biology Medicine & Health, The University of Manchester, Greater Manchester, UK.
| | - Dharmi Kapadia
- School of Social Sciences, University of Manchester, Greater Manchester, UK
| | - Ruth Watkinson
- Centre for Primary Care & Health Services Research, School of Health Sciences, Faculty of Biology Medicine & Health, The University of Manchester, Greater Manchester, UK
- NIHR Applied Research Collaboration for Greater Manchester, Greater Manchester, UK
| | - Basma Issa
- Independent public contributor, Greater Manchester, UK
| | | | - Caroline Sanders
- Centre for Primary Care & Health Services Research, School of Health Sciences, Faculty of Biology Medicine & Health, The University of Manchester, Greater Manchester, UK
- NIHR Applied Research Collaboration for Greater Manchester, Greater Manchester, UK
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10
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Mistry HK, Hernandez A, Guéguen P, Lombardi D. Effect of earthquake sequences on risk-based catastrophe bond pricing. Risk Anal 2024. [PMID: 38462733 DOI: 10.1111/risa.14288] [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] [Indexed: 03/12/2024]
Abstract
Catastrophe bonds (cat bond in short) are an alternative risk-transfer instrument used to transfer peril-specific financial risk from governments, financial institutions, or (re)insurers, to the capital market. Current approaches for cat bond pricing are calibrated on seismic mainshocks, and thus do not account for potential effects induced by earthquake sequences. This simplifying assumption implies that damage arises from mainshocks only, while aftershocks yield no damage. Postearthquake field surveys reveal that this assumption is inaccurate. For example, in the 2011 Christchurch Earthquake sequence and 2016-2017 Central Italy Earthquake sequence, aftershocks were responsible for higher economic losses when compared to those caused by mainshocks. This article proposes a time-dependent aggregate loss model that takes into account seismicity clustering and damage accumulation effects in the computation of damage. The model is calibrated on the seismic events recorded during the recent 2016-2017 Central Italy Earthquake sequence. Furthermore, the effects of earthquake sequence on cat bond pricing is explored by implementing the proposed model on five Italian municipalities. The investigation showed that neglecting time-dependency may lead to higher difference (up to 45%) in the cat bond price when compared to standard approaches.
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Affiliation(s)
- Harsh K Mistry
- Department of Mechanical, Aerospace and Civil Engineering, University of Manchester, Manchester, UK
| | - Andres Hernandez
- ISTerre, Université Grenoble Alpes, Université Savoie Mont-Blanc, CNRS, IRD, Université Gustave Eiffel, Grenoble, France
| | - Philippe Guéguen
- ISTerre, Université Grenoble Alpes, Université Savoie Mont-Blanc, CNRS, IRD, Université Gustave Eiffel, Grenoble, France
| | - Domenico Lombardi
- Department of Mechanical, Aerospace and Civil Engineering, University of Manchester, Manchester, UK
- Disaster Resilience Solutions Ltd., London, UK
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11
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Dedola S, Ahmadipour S, de Andrade P, Baker AN, Boshra AN, Chessa S, Gibson MI, Hernando PJ, Ivanova IM, Lloyd JE, Marín MJ, Munro-Clark AJ, Pergolizzi G, Richards SJ, Ttofi I, Wagstaff BA, Field RA. Sialic acids in infection and their potential use in detection and protection against pathogens. RSC Chem Biol 2024; 5:167-188. [PMID: 38456038 PMCID: PMC10915975 DOI: 10.1039/d3cb00155e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Accepted: 12/12/2023] [Indexed: 03/09/2024] Open
Abstract
In structural terms, the sialic acids are a large family of nine carbon sugars based around an alpha-keto acid core. They are widely spread in nature, where they are often found to be involved in molecular recognition processes, including in development, immunology, health and disease. The prominence of sialic acids in infection is a result of their exposure at the non-reducing terminus of glycans in diverse glycolipids and glycoproteins. Herein, we survey representative aspects of sialic acid structure, recognition and exploitation in relation to infectious diseases, their diagnosis and prevention or treatment. Examples covered span influenza virus and Covid-19, Leishmania and Trypanosoma, algal viruses, Campylobacter, Streptococci and Helicobacter, and commensal Ruminococci.
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Affiliation(s)
- Simone Dedola
- Department of Chemistry and Manchester Institute of Biotechnology, University of Manchester 131 Princess Street Manchester M1 7DN UK
- Iceni Glycoscience Ltd, Norwich Research Park Norwich NR4 7TJ UK
| | - Sanaz Ahmadipour
- Department of Chemistry and Manchester Institute of Biotechnology, University of Manchester 131 Princess Street Manchester M1 7DN UK
| | - Peterson de Andrade
- Department of Chemistry and Manchester Institute of Biotechnology, University of Manchester 131 Princess Street Manchester M1 7DN UK
| | - Alexander N Baker
- Department of Chemistry, University of Warwick Gibbet Hill Road Coventry CV4 7AL UK
| | - Andrew N Boshra
- Department of Chemistry and Manchester Institute of Biotechnology, University of Manchester 131 Princess Street Manchester M1 7DN UK
- Department of Pharmaceutical Organic Chemistry, Faculty of Pharmacy, Assiut University Assiut 71526 Egypt
| | - Simona Chessa
- Iceni Glycoscience Ltd, Norwich Research Park Norwich NR4 7TJ UK
| | - Matthew I Gibson
- Department of Chemistry and Manchester Institute of Biotechnology, University of Manchester 131 Princess Street Manchester M1 7DN UK
- Department of Chemistry, University of Warwick Gibbet Hill Road Coventry CV4 7AL UK
- Division of Biomedical Sciences, Warwick Medical School Coventry CV4 7AL UK
| | - Pedro J Hernando
- Iceni Glycoscience Ltd, Norwich Research Park Norwich NR4 7TJ UK
| | - Irina M Ivanova
- Iceni Glycoscience Ltd, Norwich Research Park Norwich NR4 7TJ UK
| | - Jessica E Lloyd
- Department of Chemistry and Manchester Institute of Biotechnology, University of Manchester 131 Princess Street Manchester M1 7DN UK
| | - María J Marín
- School of Chemistry, University of East Anglia, Norwich Research Park Norwich NR4 7TJ UK
| | - Alexandra J Munro-Clark
- Department of Chemistry and Manchester Institute of Biotechnology, University of Manchester 131 Princess Street Manchester M1 7DN UK
| | | | - Sarah-Jane Richards
- Department of Chemistry and Manchester Institute of Biotechnology, University of Manchester 131 Princess Street Manchester M1 7DN UK
- Department of Chemistry, University of Warwick Gibbet Hill Road Coventry CV4 7AL UK
| | - Iakovia Ttofi
- Department of Chemistry and Manchester Institute of Biotechnology, University of Manchester 131 Princess Street Manchester M1 7DN UK
- Iceni Glycoscience Ltd, Norwich Research Park Norwich NR4 7TJ UK
| | - Ben A Wagstaff
- Department of Chemistry and Manchester Institute of Biotechnology, University of Manchester 131 Princess Street Manchester M1 7DN UK
| | - Robert A Field
- Department of Chemistry and Manchester Institute of Biotechnology, University of Manchester 131 Princess Street Manchester M1 7DN UK
- Iceni Glycoscience Ltd, Norwich Research Park Norwich NR4 7TJ UK
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12
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Gates EL, Bradley JP, Berry DBG, Nilsson M, Morris GA, Adams RW, Castañar L. Solvent Suppression in Pure Shift NMR. Anal Chem 2024; 96:3879-3885. [PMID: 38380610 PMCID: PMC10918619 DOI: 10.1021/acs.analchem.3c05379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 01/30/2024] [Accepted: 01/30/2024] [Indexed: 02/22/2024]
Abstract
Intense solvent signals in 1H solution-state NMR experiments typically cause severe distortion of spectra and mask nearby solute signals. It is often infeasible or undesirable to replace a solvent with its perdeuterated form, for example, when analyzing formulations in situ, when exchangeable protons are present, or for practical reasons. Solvent signal suppression techniques are therefore required. WATERGATE methods are well-known to provide good solvent suppression while enabling retention of signals undergoing chemical exchange with the solvent signal. Spectra of mixtures, such as pharmaceutical formulations, are often complicated by signal overlap, high dynamic range, the narrow spectral width of 1H NMR, and signal multiplicity. Here, we show that by combining WATERGATE solvent suppression with pure shift NMR, ultrahigh-resolution 1H NMR spectra can be acquired while suppressing intense solvent signals and retaining exchangeable 1H signals. The new method is demonstrated in the analysis of cyanocobalamin, a vitamin B12 supplement, and of an eye-drop formulation of atropine.
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Affiliation(s)
- Emma L. Gates
- Department
of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Jonathan P. Bradley
- Johnson
Matthey Technology Centre, Blounts Court Road, Sonning
Common RG4 9NH, U.K.
| | - Daniel B. G. Berry
- Johnson
Matthey Technology Centre, Blounts Court Road, Sonning
Common RG4 9NH, U.K.
| | - Mathias Nilsson
- Department
of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Gareth A. Morris
- Department
of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Ralph W. Adams
- Department
of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Laura Castañar
- Department
of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
- Department
of Organic Chemistry, Faculty of Chemical Science, Complutense University of Madrid, 28040 Madrid, Spain
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13
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Beesley R, Luling Feilding F, Rosser EC, Shoop-Worrall SJW, McNeece A, Wanstall Z, Hyrich K, Wedderburn LR. Development and implementation of 'A guide to PPIE - Early Integration into Research Proposals' in a multi-disciplinary consortium. Rheumatology (Oxford) 2024; 63:e88-e91. [PMID: 37707533 PMCID: PMC10907810 DOI: 10.1093/rheumatology/kead482] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Revised: 08/04/2023] [Accepted: 08/10/2023] [Indexed: 09/15/2023] Open
Affiliation(s)
| | - Freya Luling Feilding
- Infection Immunity and Inflammation Research and Teaching Department UCL Great Ormond Street Institute of Child Health, London, UK
| | - Elizabeth C Rosser
- Centre for Adolescent Rheumatology Versus Arthritis at UCL, University College London Hospitals (UCLH) and Great Ormond Street Hospital (GOSH), London, UK
- Centre for Rheumatology Research, Division of Medicine, University College London, London, UK
| | - Stephanie J W Shoop-Worrall
- Centre for Epidemiology, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester Academic Health Sciences Centre, Manchester, UK
| | - Alyssia McNeece
- Infection Immunity and Inflammation Research and Teaching Department UCL Great Ormond Street Institute of Child Health, London, UK
| | - Zoe Wanstall
- Infection Immunity and Inflammation Research and Teaching Department UCL Great Ormond Street Institute of Child Health, London, UK
| | - Kimme Hyrich
- Centre for Epidemiology, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester Academic Health Sciences Centre, Manchester, UK
- National Institute of Health Research Manchester Biomedical Research Centre, Manchester University NHS Trust, Manchester, UK
| | - Lucy R Wedderburn
- Infection Immunity and Inflammation Research and Teaching Department UCL Great Ormond Street Institute of Child Health, London, UK
- Centre for Adolescent Rheumatology Versus Arthritis at UCL, University College London Hospitals (UCLH) and Great Ormond Street Hospital (GOSH), London, UK
- National Institute of Health Research Biomedical Research Centre at GOSH, London, UK
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14
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Patel K, Pirie D, Heazell AEP, Morgan B, Woolner A. Subsequent pregnancy outcomes after second trimester miscarriage or termination for medical/fetal reason: A systematic review and meta-analysis of observational studies. Acta Obstet Gynecol Scand 2024; 103:413-422. [PMID: 38037500 PMCID: PMC10867354 DOI: 10.1111/aogs.14731] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Revised: 11/05/2023] [Accepted: 11/08/2023] [Indexed: 12/02/2023]
Abstract
INTRODUCTION Women with a prior stillbirth or a history of recurrent first trimester miscarriages are at increased risk of adverse pregnancy outcomes. However, little is known about the impact of a second trimester pregnancy loss on subsequent pregnancy outcome. This review investigated if second trimester miscarriage or termination for medical reason or fetal anomaly (TFMR/TOPFA) is associated with future adverse pregnancy outcomes. MATERIAL AND METHODS A systematic review of observational studies was conducted. Eligible studies included women with a history of a second trimester miscarriage or termination for medical reasons and their pregnancy outcomes in the subsequent pregnancy. Where comparative studies were identified, studies which compared subsequent pregnancy outcomes for women with and without a history of second trimester loss or TFMR/TOPFA were included. The primary outcome was livebirth, and secondary outcomes included: miscarriage (first and second trimester), termination of pregnancy, fetal growth restriction, cesarean section, preterm birth, pre-eclampsia, antepartum hemorrhage, stillbirth and neonatal death. Studies were excluded if exposure was nonmedical termination or if related to twins or higher multiple pregnancies. Electronic searches were conducted using the online databases (MEDLINE, Embase, PubMed and The Cochrane Library) and searches were last updated on June 16, 2023. Risk of bias was assessed using the Newcastle-Ottawa scale. Where possible, meta-analysis was undertaken. PROSPERO registration: CRD42023375033. RESULTS Ten studies were included, reporting on 12 004 subsequent pregnancies after a second trimester pregnancy miscarriage. No studies were found on outcomes after second trimester TFMR/TOPFA. Overall, available data were of "very low quality" using GRADE assessment. Meta-analysis of cohort studies generated estimated outcome frequencies for women with a previous second trimester loss as follows: live birth 81% (95% CI: 64-94), miscarriage 15% (95% CI: 4-30, preterm birth 13% [95% CI: 6-23]).The pooled odds ratio for preterm birth in subsequent pregnancy after second trimester loss in case-control studies was OR 4.52 (95% CI: 3.03-6.74). CONCLUSIONS Very low certainty evidence suggests there may be an increased risk of preterm birth in a subsequent pregnancy after a late miscarriage. However, evidence is limited. Larger, higher quality cohort studies are needed to investigate this potential association.
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Affiliation(s)
- Keya Patel
- Maternal and Fetal Health Research Center, Division of Developmental Biology and Medicine, School of Medical Sciences, Faculty of Biology, Medicine and HealthUniversity of ManchesterManchesterUK
- Department of ObstetricsManchester University NHS Foundation TrustManchesterUK
| | - Danielle Pirie
- Aberdeen Center for Women's Health Research, Institute of Applied Health Sciences, School of Medicine, Medical Sciences & NutritionUniversity of AberdeenAberdeenUK
- NHS Grampian, Aberdeen Maternity HospitalAberdeenUK
| | - Alexander E. P. Heazell
- Maternal and Fetal Health Research Center, Division of Developmental Biology and Medicine, School of Medical Sciences, Faculty of Biology, Medicine and HealthUniversity of ManchesterManchesterUK
- Department of ObstetricsManchester University NHS Foundation TrustManchesterUK
| | - Bethan Morgan
- Library ServicesManchester University NHS Foundation TrustManchesterUK
| | - Andrea Woolner
- Aberdeen Center for Women's Health Research, Institute of Applied Health Sciences, School of Medicine, Medical Sciences & NutritionUniversity of AberdeenAberdeenUK
- NHS Grampian, Aberdeen Maternity HospitalAberdeenUK
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15
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Sullivan E, Thampy H, Gay S. Raising professionalism concerns as a medical student: damned if they do, damned if they don't? BMC Med Educ 2024; 24:208. [PMID: 38424552 PMCID: PMC10905891 DOI: 10.1186/s12909-024-05144-4] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Accepted: 02/07/2024] [Indexed: 03/02/2024]
Abstract
BACKGROUND Understanding professionalism is an essential component of becoming a doctor in order to ensure the trust of patients and wider society. Integrally linked to the concept of professionalism is the importance of identifying and raising concerns to ensure high quality, safe patient care. It is recognised that medical students are uniquely placed to identify and report concerns given their frequent rotations through multiple clinical placements and their peer relationships and, in so doing, develop and enact their own medical professionalism. Although there is existing literature exploring medical students' willingness to raise concerns about observed professionalism lapses, this has largely been in the context of clinical interactions. Medical students will however undoubtedly encounter concerning behaviours or attitudes in their fellow students, an area that has not specifically been reported upon. This study therefore set out to explore medical students' willingness to report professionalism concerns they encounter both within and away from the clinical setting, particularly focusing on peer-related concerns. METHODS 10 medical students, in later clinical years of a large UK medical school, volunteered to take part in in-depth semi-structured interviews. Interviews were recorded, transcribed and then analysed thematically to generate themes and subthemes to represent central organising concepts. RESULTS Three broad themes were generated from the data. Hidden curricular effects including role models, hierarchical structures and the operational systems in place to raise concerns subconsciously influenced students' decisions to raise concerns. Secondly, students offered a range of justifications to defend not taking action, including considering their own vulnerabilities and values alongside demonstrating empathy for perceived mitigating circumstances. The third theme highlighted the complex interplay of influencing factors that students considered when encountering professionalism issues in their peers including wider peer cohort effects and a desire to maintain individual peer-relationships. CONCLUSIONS Medical students will inevitably encounter situations where the professionalism of others is brought into question. However, despite clear curricular expectations to report such concerns, these findings demonstrate that students undergo a complex decision-making process in determining the threshold for reporting a concern through navigating a range of identified influencing factors. This study highlights the important role medical schools play in helping reduce the inner conflict experienced by medical students when raising concerns and in ensuring they provide supportive processes to empower their students to raise concerns as part their own developing professionalism.
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Affiliation(s)
| | | | - Simon Gay
- University of Leicester, Leicester, UK
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16
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Jafar AJN, Patel S, Mitchell R, Redmond A. Redefining global health and shifting the balance: the ARC-H principle. BMJ Glob Health 2024; 9:e014487. [PMID: 38388160 PMCID: PMC10884221 DOI: 10.1136/bmjgh-2023-014487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Accepted: 01/28/2024] [Indexed: 02/24/2024] Open
Affiliation(s)
- Anisa Jabeen Nasir Jafar
- Department of Emergency, Royal Manchester Children's Hospital, Manchester, UK
- HCRI, The University of Manchester, Manchester, UK
| | - Shama Patel
- Department of Emergency Medicine, University of Florida, Jacksonville, Florida, USA
| | - Rob Mitchell
- Department of Emergency & Trauma Centre, Alfred Hospital, Melbourne, Victoria, Australia
- School of Public Health & Preventive Medicine, Monash University, Melbourne, Victoria, Australia
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17
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Nodaraki LE, Liu J, Ariciu AM, Ortu F, Oakley MS, Birnoschi L, Gransbury GK, Cobb PJ, Emerson-King J, Chilton NF, Mills DP, McInnes EJL, Tuna F. Metal-carbon bonding in early lanthanide substituted cyclopentadienyl complexes probed by pulsed EPR spectroscopy. Chem Sci 2024; 15:3003-3010. [PMID: 38404384 PMCID: PMC10882510 DOI: 10.1039/d3sc06175b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Accepted: 01/12/2024] [Indexed: 02/27/2024] Open
Abstract
We examine lanthanide (Ln)-ligand bonding in a family of early Ln3+ complexes [Ln(Cptt)3] (1-Ln, Ln = La, Ce, Nd, Sm; Cptt = C5H3tBu2-1,3) by pulsed electron paramagnetic resonance (EPR) methods, and provide the first characterization of 1-La and 1-Nd by single crystal XRD, multinuclear NMR, IR and UV/Vis/NIR spectroscopy. We measure electron spin T1 and Tm relaxation times of 12 and 0.2 μs (1-Nd), 89 and 1 μs (1-Ce) and 150 and 1.7 μs (1-Sm), respectively, at 5 K: the T1 relaxation of 1-Nd is more than 102 times faster than its valence isoelectronic uranium analogue. 13C and 1H hyperfine sublevel correlation (HYSCORE) spectroscopy reveals that the extent of covalency is negligible in these Ln compounds, with much smaller hyperfine interactions than observed for equivalent actinide (Th and U) complexes. This is corroborated by ab initio calculations, confirming the predominant electrostatic nature of the metal-ligand bonding in these complexes.
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Affiliation(s)
- Lydia E Nodaraki
- Department of Chemistry, The University of Manchester Oxford Road Manchester M13 9PL UK
- Photon Science Institute, The University of Manchester Oxford Road Manchester M13 9PL UK
| | - Jingjing Liu
- Department of Chemistry, The University of Manchester Oxford Road Manchester M13 9PL UK
| | - Ana-Maria Ariciu
- Department of Chemistry, The University of Manchester Oxford Road Manchester M13 9PL UK
- Photon Science Institute, The University of Manchester Oxford Road Manchester M13 9PL UK
| | - Fabrizio Ortu
- Department of Chemistry, The University of Manchester Oxford Road Manchester M13 9PL UK
| | - Meagan S Oakley
- Department of Chemistry, The University of Manchester Oxford Road Manchester M13 9PL UK
| | - Letitia Birnoschi
- Department of Chemistry, The University of Manchester Oxford Road Manchester M13 9PL UK
| | - Gemma K Gransbury
- Department of Chemistry, The University of Manchester Oxford Road Manchester M13 9PL UK
| | - Philip J Cobb
- Department of Chemistry, The University of Manchester Oxford Road Manchester M13 9PL UK
| | - Jack Emerson-King
- Department of Chemistry, The University of Manchester Oxford Road Manchester M13 9PL UK
| | - Nicholas F Chilton
- Department of Chemistry, The University of Manchester Oxford Road Manchester M13 9PL UK
| | - David P Mills
- Department of Chemistry, The University of Manchester Oxford Road Manchester M13 9PL UK
| | - Eric J L McInnes
- Department of Chemistry, The University of Manchester Oxford Road Manchester M13 9PL UK
- Photon Science Institute, The University of Manchester Oxford Road Manchester M13 9PL UK
| | - Floriana Tuna
- Department of Chemistry, The University of Manchester Oxford Road Manchester M13 9PL UK
- Photon Science Institute, The University of Manchester Oxford Road Manchester M13 9PL UK
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18
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Bertran A, De Zotti M, Timmel CR, Di Valentin M, Bowen AM. Determining and controlling conformational information from orientationally selective light-induced triplet-triplet electron resonance spectroscopy for a set of bis-porphyrin rulers. Phys Chem Chem Phys 2024; 26:2589-2602. [PMID: 38170870 PMCID: PMC10793979 DOI: 10.1039/d3cp03454b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Accepted: 10/31/2023] [Indexed: 01/05/2024]
Abstract
We recently reported a new technique, light-induced triplet-triplet electron resonance (LITTER) spectroscopy, which allows quantification of the dipolar interaction between the photogenerated triplet states of two chromophores. Here we carry out a systematic LITTER study, considering orientation selection by the detection pulses, of a series of bis-porphyrin model peptides with different porphyrin-porphyrin distances and relative orientations. Orientation-dependent analysis of the dipolar datasets yields conformational information of the molecules in frozen solution which is in good agreement with density functional theory predictions. Additionally, a fast partial orientational-averaging treatment produces distance distributions with minimized orientational artefacts. Finally, by direct comparison of LITTER data to double electron-electron resonance (DEER) measured on a system with Cu(II) coordinated into the porphyrins, we demonstrate the advantages of the LITTER technique over the standard DEER methodology. This is due to the remarkable spectroscopic properties of the photogenerated porphyrin triplet state. This work sets the basis for the use of LITTER in structural investigations of unmodified complex biological macromolecules, which could be combined with Förster resonance energy transfer and microscopy inside cells.
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Affiliation(s)
- Arnau Bertran
- Centre for Advanced Electron Spin Resonance and Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QR, UK.
| | - Marta De Zotti
- Department of Chemical Sciences, University of Padova, Via Marzolo 1, 35131 Padova, Italy
- Centro Interdipartimentale di Ricerca "Centro Studi di Economia e Tecnica dell'energia Giorgio Levi Cases", 35131 Padova, Italy.
| | - Christiane R Timmel
- Centre for Advanced Electron Spin Resonance and Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QR, UK.
| | - Marilena Di Valentin
- Department of Chemical Sciences, University of Padova, Via Marzolo 1, 35131 Padova, Italy
- Centro Interdipartimentale di Ricerca "Centro Studi di Economia e Tecnica dell'energia Giorgio Levi Cases", 35131 Padova, Italy.
| | - Alice M Bowen
- The National Research Facility for Electron Paramagnetic Resonance, Department of Chemistry and Photon Science Institute, The University of Manchester, Oxford Road, Manchester M13 9PL, UK.
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19
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Alabi-Babalola O, Aransiola E, Asuquo E, Garforth A, D'Agostino C. Production of Highly Efficient Activated Carbons for Wastewater Treatment from Post-Consumer PET Plastic Bottle Waste. Chempluschem 2024:e202300484. [PMID: 38189572 DOI: 10.1002/cplu.202300484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 11/30/2023] [Indexed: 01/09/2024]
Abstract
Chemical activated carbons (PET-H2 SO4 and PET-KOH) were prepared from post-consumer polyethylene terephthalate (PET) wastes using pyrolysis under moderate reaction temperatures by changing pyrolysis time and chemical activating agents. The produced carbons were characterized and tested in adsorption reactions of manganese, chromium, and cobalt ions in aqueous solutions. Results showed a high percentage removal of these inorganic ions from water: 98 % for Mn2+ , 87 % for Cr3+ , and 88 % for Co2+ . Freundlich isotherms gave a better fit to the experimental data obtained with good correlation coefficient values in the range of 0.99-1 compared to other isotherms. The pseudo-second order kinetic model best described the chemical adsorption process as an exchange of electrons between the carbon and inorganic ions in solutions. The diffusion models showed that the process is controlled by a multi-kinetic stage adsorption process. In summary, this work demonstrates that the production of activated carbon from PET waste bottles is a potential alternative to commercial activated carbon and can be considered a sustainable waste management technology for removing these non-biodegradable plastic wastes from the environment.
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Affiliation(s)
- Olajumoke Alabi-Babalola
- Department of Chemical Engineering, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK
- Department of Chemical Engineering, Obafemi Awolowo University, Ile-Ife, Nigeria
| | - Elizabeth Aransiola
- Department of Chemical Engineering, Obafemi Awolowo University, Ile-Ife, Nigeria
| | - Edidiong Asuquo
- Department of Chemical Engineering, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK
| | - Arthur Garforth
- Department of Chemical Engineering, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK
| | - Carmine D'Agostino
- Department of Chemical Engineering, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK
- Dipartimento di Ingegneria Civile, Chimica, Ambientale e dei Materiali (DICAM), Alma Mater Studiorum - Università di, Bologna, Via Terracini, 28, 40131, Bologna, Italy
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20
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Salaudeen MA, Allan S, Pinteaux E. Hypoxia and interleukin-1-primed mesenchymal stem/stromal cells as novel therapy for stroke. Hum Cell 2024; 37:154-166. [PMID: 37987924 PMCID: PMC10764391 DOI: 10.1007/s13577-023-00997-1] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Accepted: 10/11/2023] [Indexed: 11/22/2023]
Abstract
Promising preclinical stroke research has not yielded meaningful and significant success in clinical trials. This lack of success has prompted the need for refinement of preclinical studies with the intent to optimize the chances of clinical success. Regenerative medicine, especially using mesenchymal stem/stromal cells (MSCs), has gained popularity in the last decade for treating many disorders, including central nervous system (CNS), such as stroke. In addition to less stringent ethical constraints, the ample availability of MSCs also makes them an attractive alternative to totipotent and other pluripotent stem cells. The ability of MSCs to differentiate into neurons and other brain parenchymal and immune cells makes them a promising therapy for stroke. However, these cells also have some drawbacks that, if not addressed, will render MSCs unfit for treating ischaemic stroke. In this review, we highlighted the molecular and cellular changes that occur following an ischaemic stroke (IS) incidence and discussed the physiological properties of MSCs suitable for tackling these changes. We also went further to discuss the major drawbacks of utilizing MSCs in IS and how adequate priming using both hypoxia and interleukin-1 can optimize the beneficial properties of MSCs while eliminating these drawbacks.
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Affiliation(s)
- Maryam Adenike Salaudeen
- Faculty of Biology, Medicine, and Health, Division of Neuroscience, University of Manchester, Manchester, UK
- Department of Pharmacology and Therapeutics, Ahmadu Bello University, Zaria, Nigeria
| | - Stuart Allan
- Faculty of Biology, Medicine, and Health, Division of Neuroscience, University of Manchester, Manchester, UK
| | - Emmanuel Pinteaux
- Faculty of Biology, Medicine, and Health, Division of Neuroscience, University of Manchester, Manchester, UK.
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21
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Patterson EA, Taylor RJ, Yao Y. The impact of digital technologies on knowledge networks in two engineering organisations. PLoS One 2023; 18:e0295250. [PMID: 38117754 PMCID: PMC10732442 DOI: 10.1371/journal.pone.0295250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Accepted: 11/18/2023] [Indexed: 12/22/2023] Open
Abstract
The management and exploitation of knowledge can contribute to the competitive advantage of an organisation and hence can be a driver of its value. This paper examines knowledge management practices within two engineering organisations with an emphasis on barriers to its effectiveness and the influence of current and anticipated deployment of digital technologies. Two methods were used to gather research data across both organisations by combining a series of semi-structured interviews with a quantitative social network analysis. Examination of the acquired data provided insights into the relationship between the knowledge management culture in both organisations and their adoption of digital tools. Hudson's evolutionary model of safety culture has been modified to describe the culture of knowledge management in an organisation and the acquired data used to locate the two organisations on their knowledge management journey. It is proposed that social networks could be used as an indicator of the stage of evolution of knowledge management in engineering organisations more generally with low network densities and dispersed networks representing higher stages of evolution.
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Affiliation(s)
- Eann A. Patterson
- School of Engineering, University of Liverpool, Liverpool, United Kingdom
| | - Richard J. Taylor
- Department of Mechanical, Aerospace and Civil Engineering, University of Manchester, Manchester, United Kingdom
| | - Yuxin Yao
- School of Engineering, University of Manchester, Manchester, United Kingdom
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22
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Hu X, Liao M, Shen K, Ding K, Campana M, van der Kamp S, McInnes EF, Padia F, Lu JR. Unraveling How Membrane Nanostructure Changes Impact the Eye Irritation of Nonionic Alkyl Ethoxylate Surfactants. ACS Appl Mater Interfaces 2023; 15:59087-59098. [PMID: 38078441 PMCID: PMC10739585 DOI: 10.1021/acsami.3c14794] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Revised: 11/28/2023] [Accepted: 11/29/2023] [Indexed: 12/22/2023]
Abstract
Nonionic surfactants used in agri-spraying processes may cause varying degrees of corneal irritation when they come in direct contact with farmers' eyes, and the exact irritations are thought to be determined by how surfactants interact with corneal cell membranes. However, how nonionic surfactants interact with cell membranes at the molecular and nano levels remains largely unexplored. In this study, the interactions between nonionic surfactants (alkyl ethoxylate, C12Em) and lipid membranes were examined by membrane permeability measurement, quartz crystal microbalance with dissipation, dual polarization interferometry, confocal laser scanning microscopy, and neutron reflection, aiming to reveal complementary structural features at the molecular and nano levels. Apart from the extremely hydrophobic surfactant C12E2, all nonionic surfactants studied could penetrate the model cell membrane composed of a phosphocholine lipid bilayer. Nonionic surfactants with intermediate amphiphilicity (C12E6) rapidly fused into the lipid membrane and stimulated the formation of pores across the lipid bilayer, consistent with the cytoplasm leakage and fast cell necrosis observed from the cytotoxicity study of corneal cells. In comparison, while hydrophobic and hydrophilic surfactants [those with long and short ethoxylates (C12E4,12,23)] could cause mild structural alteration to the outer lipid layer of the membrane, these structural changes were insufficient to elicit large cytoplasmic leakage rapidly and instead cell death occurred over longer periods of time due to changes in the membrane permeability. These results reveal the strong link of surfactant-lipid membrane interactions to surfactant cytotoxicity and the association with amphiphilicity of nonionic surfactants.
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Affiliation(s)
- Xuzhi Hu
- Biological
Physics Group, Department of Physics and Astronomy, School of Natural
Sciences, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Mingrui Liao
- Biological
Physics Group, Department of Physics and Astronomy, School of Natural
Sciences, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Kangcheng Shen
- Biological
Physics Group, Department of Physics and Astronomy, School of Natural
Sciences, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Ke Ding
- Biological
Physics Group, Department of Physics and Astronomy, School of Natural
Sciences, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Mario Campana
- Rutherford
Appleton Laboratory, STFC ISIS Facility, Didcot OX11 0QX, U.K.
| | - Sophie van der Kamp
- Jealott’s
Hill International Research Centre, Syngenta, Bracknell, Berkshire RG42
6EY, U.K.
| | - Elizabeth F. McInnes
- Jealott’s
Hill International Research Centre, Syngenta, Bracknell, Berkshire RG42
6EY, U.K.
| | - Faheem Padia
- Jealott’s
Hill International Research Centre, Syngenta, Bracknell, Berkshire RG42
6EY, U.K.
| | - Jian R. Lu
- Biological
Physics Group, Department of Physics and Astronomy, School of Natural
Sciences, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
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23
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Baker CF, Seed JA, Adams RW, Lee D, Liddle ST. 13C carbene nuclear magnetic resonance chemical shift analysis confirms Ce IV[double bond, length as m-dash]C double bonding in cerium(iv)-diphosphonioalkylidene complexes. Chem Sci 2023; 15:238-249. [PMID: 38131084 PMCID: PMC10732143 DOI: 10.1039/d3sc04449a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Accepted: 11/27/2023] [Indexed: 12/23/2023] Open
Abstract
Diphosphonioalkylidene dianions have emerged as highly effective ligands for lanthanide and actinide ions, and the resulting formal metal-carbon double bonds have challenged and developed conventional thinking about f-element bond multiplicity and covalency. However, f-element-diphosphonioalkylidene complexes can be represented by several resonance forms that render their metal-carbon double bond status unclear. Here, we report an experimentally-validated 13C Nuclear Magnetic Resonance computational assessment of two cerium(iv)-diphosphonioalkylidene complexes, [Ce(BIPMTMS)(ODipp)2] (1, BIPMTMS = {C(PPh2NSiMe3)2}2-; Dipp = 2,6-diisopropylphenyl) and [Ce(BIPMTMS)2] (2). Decomposing the experimental alkylidene chemical shifts into their corresponding calculated shielding (σ) tensor components verifies that these complexes exhibit Ce[double bond, length as m-dash]C double bonds. Strong magnetic coupling of Ce[double bond, length as m-dash]C σ/π* and π/σ* orbitals produces strongly deshielded σ11 values, a characteristic hallmark of alkylidenes, and the largest 13C chemical shift tensor spans of any alkylidene complex to date (1, 801 ppm; 2, 810 ppm). In contrast, the phosphonium-substituent shielding contributions are much smaller than the Ce[double bond, length as m-dash]C σ- and π-bond components. This study confirms significant Ce 4f-orbital contributions to the Ce[double bond, length as m-dash]C bonding, provides further support for a previously proposed inverse-trans-influence in 2, and reveals variance in the 4f spin-orbit contributions that relate to the alkylidene hybridisation. This work thus confirms the metal-carbon double bond credentials of f-element-diphosphonioalkylidenes, providing quantified benchmarks for understanding diphosphonioalkylidene bonding generally.
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Affiliation(s)
- Cameron F Baker
- Department of Chemistry, The University of Manchester Oxford Road Manchester M13 9PL UK
| | - John A Seed
- Department of Chemistry, The University of Manchester Oxford Road Manchester M13 9PL UK
| | - Ralph W Adams
- Department of Chemistry, The University of Manchester Oxford Road Manchester M13 9PL UK
| | - Daniel Lee
- Department of Chemical Engineering, The University of Manchester Oxford Road Manchester M13 9PL UK
| | - Stephen T Liddle
- Department of Chemistry, The University of Manchester Oxford Road Manchester M13 9PL UK
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Aye ST, Liu S, Byrne E, El-Angbawi A. The prevalence of the failure of fixed orthodontic bonded retainers: a systematic review and meta-analysis. Eur J Orthod 2023; 45:645-661. [PMID: 37824794 PMCID: PMC10687514 DOI: 10.1093/ejo/cjad047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2023]
Abstract
OBJECTIVES To systematically assess the scientific literature for the prevalence of failure rate of fixed orthodontic bonded retainer (FOBR). METHOD Randomized clinical trials (RCTs) and prospective non-RCTs involving participants who had FOBR fitted were included. The Cochrane Central Register of Controlled Trials, Web of science, MEDLINE, and EMBASE via OVID were searched from inception to January 2023. Risk of bias was assessed using the Cochrane RoB 2 and Newcastle-Ottawa tools. The main outcome was the failure rate of FOBRs. The secondary outcome was to identify factors that can influence the failure of FOBR. Meta-analyses and sensitivity analyses were undertaken using Revman, version5.4. A random-effects model was used. Quality assessment using Grading of Recommendations Assessment, Development, and Evaluation. RESULTS Thirty-four studies (25 RCTs and 9 prospective clinical studies) (3484 participants) were included in this review. The overall failure rate of bonded retainers, after excluding high-risk studies, was 35.22% (95% confidence interval [CI] 27.46-42.98). The failure rate is increased with the duration of follow up; with short-term follow-up rate 24.18% (95% CI 20.16-28.21), medium-term follow up 40.09% (95% CI 30.92-49.26), and long-term follow up 53.85% (95% CI 40.31-67.39). There is a low level of evidence to suggest there is no statistically significant difference in the failure rate of fixed retainers using direct versus indirect bonding methods, using liquid resin versus without liquid resin, and fibre-reinforced composite retainers compared to multi-stranded stainless steel retainers. DISCUSSION There is low-quality evidence to suggest that the failure rate of FOBR is relatively high. There is a need for high-quality, well-reported clinical studies to assess factors that can influence the failure rate of FOBR. REGISTRATION CRD42021190910.
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Affiliation(s)
- Su Thae Aye
- Division of Dentistry, Faculty of Biology, Medicine and Health, University of Manchester, UK
| | - Shiyao Liu
- Division of Dentistry, Faculty of Biology, Medicine and Health, University of Manchester, UK
| | - Emer Byrne
- University Dental Hospital of Manchester, MFT NHS Trust, UK
| | - Ahmed El-Angbawi
- Division of Dentistry, Faculty of Biology, Medicine and Health, University of Manchester, UK
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Picken CAR, Buensoz O, Price PD, Fidge C, Points L, Shaver MP. Sustainable formulation polymers for home, beauty and personal care: challenges and opportunities. Chem Sci 2023; 14:12926-12940. [PMID: 38023508 PMCID: PMC10664511 DOI: 10.1039/d3sc04488b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2023] [Accepted: 10/03/2023] [Indexed: 12/01/2023] Open
Abstract
As society moves towards a net-zero future, the need to adopt more sustainable polymers is well understood, and as well as plastics, less visible formulation polymers should also be included within this shift. As researchers, industries and consumers move towards more sustainable products there is a clear need to define what sustainability means in fast moving consumer goods and how it can be considered at the design stage. In this perspective key challenges in achieving sustainable formulation polymers are highlighted, and opportunities to overcome them are presented.
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Affiliation(s)
- Christina A R Picken
- Department of Materials, Henry Royce Institute, The University of Manchester Manchester M13 9PL UK
| | - Orla Buensoz
- Department of Materials, Henry Royce Institute, The University of Manchester Manchester M13 9PL UK
| | - Paul D Price
- Unilever R&D, Port Sunlight Laboratory Quarry Road East, Bebington, Wirral CH63 3JW UK
| | - Christopher Fidge
- Unilever R&D, Port Sunlight Laboratory Quarry Road East, Bebington, Wirral CH63 3JW UK
| | - Laurie Points
- Unilever R&D, Port Sunlight Laboratory Quarry Road East, Bebington, Wirral CH63 3JW UK
| | - Michael P Shaver
- Department of Materials, Henry Royce Institute, The University of Manchester Manchester M13 9PL UK
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26
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Bennett TS, Nawaz S, Lockyer SJ, Asthana D, Whitehead GFS, Vitorica-Yrezabal IJ, Timco GA, Burton NA, Winpenny REP, McInnes EJL. A ring of rotaxanes: studies of a large paramagnetic assembly in solution. Inorg Chem Front 2023; 10:6945-6952. [PMID: 38021441 PMCID: PMC10660382 DOI: 10.1039/d3qi02165c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Accepted: 10/26/2023] [Indexed: 12/01/2023]
Abstract
Here we report the synthesis and structural characterization of four [7]rotaxanes formed by coordinating hybrid inorganic-organic [2]rotaxanes to a central {Ni12} core. X-ray single crystal diffraction demonstrate that [7]rotaxanes are formed, with a range of conformations in the crystal. Small angle X-ray scattering supported by molecular dynamic simulations demonstrates that the large molecules are stable in solution and also show that the conformers present in solution are not those found in the crystal. Pulsed EPR spectroscopy show that phase memory times for the {Cr7Ni} rings, which have been proposed as qubits, are reduced but not dramatically by the presence of the {Ni12} cage.
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Affiliation(s)
- Tom S Bennett
- Department of Chemistry, The University of Manchester Oxford Road Manchester M13 9PL UK
| | - Selina Nawaz
- Department of Chemistry, The University of Manchester Oxford Road Manchester M13 9PL UK
| | - Selena J Lockyer
- Department of Chemistry, The University of Manchester Oxford Road Manchester M13 9PL UK
| | - Deepak Asthana
- Department of Chemistry, The University of Manchester Oxford Road Manchester M13 9PL UK
| | - George F S Whitehead
- Department of Chemistry, The University of Manchester Oxford Road Manchester M13 9PL UK
| | | | - Grigore A Timco
- Department of Chemistry, The University of Manchester Oxford Road Manchester M13 9PL UK
| | - Neil A Burton
- Department of Chemistry, The University of Manchester Oxford Road Manchester M13 9PL UK
| | - Richard E P Winpenny
- Department of Chemistry, The University of Manchester Oxford Road Manchester M13 9PL UK
| | - Eric J L McInnes
- Department of Chemistry, The University of Manchester Oxford Road Manchester M13 9PL UK
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27
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Brown M, Skelton JM, Popelier PLA. Application of the FFLUX Force Field to Molecular Crystals: A Study of Formamide. J Chem Theory Comput 2023; 19:7946-7959. [PMID: 37847867 PMCID: PMC10653110 DOI: 10.1021/acs.jctc.3c00578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Indexed: 10/19/2023]
Abstract
In this work, we present the first application of the quantum chemical topology force field FFLUX to the solid state. FFLUX utilizes Gaussian process regression machine learning models trained on data from the interacting quantum atom partitioning scheme to predict atomic energies and flexible multipole moments that change with geometry. Here, the ambient (α) and high-pressure (β) polymorphs of formamide are used as test systems and optimized using FFLUX. Optimizing the structures with increasing multipolar ranks indicates that the lattice parameters of the α phase differ by less than 5% to the experimental structure when multipole moments up to the quadrupole are used. These differences are found to be in line with the dispersion-corrected density functional theory. Lattice dynamics calculations are also found to be possible using FFLUX, yielding harmonic phonon spectra comparable to dispersion-corrected DFT while enabling larger supercells to be considered than is typically possible with first-principles calculations. These promising results indicate that FFLUX can be used to accurately determine properties of molecular solids that are difficult to access using DFT, including the structural dynamics, free energies, and properties at finite temperature.
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Affiliation(s)
- Matthew
L. Brown
- Department of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, Britain
| | - Jonathan M. Skelton
- Department of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, Britain
| | - Paul L. A. Popelier
- Department of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, Britain
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28
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Filippou V, Backhouse MR, Redmond AC, Wong DC. Person-Specific Template Matching Using a Dynamic Time Warping Step-Count Algorithm for Multiple Walking Activities. Sensors (Basel) 2023; 23:9061. [PMID: 38005449 PMCID: PMC10675039 DOI: 10.3390/s23229061] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 10/22/2023] [Accepted: 11/07/2023] [Indexed: 11/26/2023]
Abstract
This study aimed to develop and evaluate a new step-count algorithm, StepMatchDTWBA, for the accurate measurement of physical activity using wearable devices in both healthy and pathological populations. We conducted a study with 30 healthy volunteers wearing a wrist-worn MOX accelerometer (Maastricht Instruments, NL). The StepMatchDTWBA algorithm used dynamic time warping (DTW) barycentre averaging to create personalised templates for representative steps, accounting for individual walking variations. DTW was then used to measure the similarity between the template and accelerometer epoch. The StepMatchDTWBA algorithm had an average root-mean-square error of 2 steps for healthy gaits and 12 steps for simulated pathological gaits over a distance of about 10 m (GAITRite walkway) and one flight of stairs. It outperformed benchmark algorithms for the simulated pathological population, showcasing the potential for improved accuracy in personalised step counting for pathological populations. The StepMatchDTWBA algorithm represents a significant advancement in accurate step counting for both healthy and pathological populations. This development holds promise for creating more precise and personalised activity monitoring systems, benefiting various health and wellness applications.
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Affiliation(s)
- Valeria Filippou
- Institute of Medical and Biological Engineering, University of Leeds, Leeds LS2 9JT, UK
| | | | - Anthony C. Redmond
- Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, Leeds LS2 9JT, UK;
| | - David C. Wong
- Leeds Institute of Health Informatics, University of Leeds, Leeds LS2 9JT, UK;
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29
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Wang M, Shanmugam M, McInnes EJL, Shaver MP. Light-Induced Polymeric Frustrated Radical Pairs as Building Blocks for Materials and Photocatalysts. J Am Chem Soc 2023; 145:24294-24301. [PMID: 37890166 PMCID: PMC10636756 DOI: 10.1021/jacs.3c09075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2023] [Revised: 10/06/2023] [Accepted: 10/11/2023] [Indexed: 10/29/2023]
Abstract
Polymeric frustrated Lewis pairs, or poly(FLP)s, have served to bridge the gap between functional polymer science and main group catalysis, pairing the uniqueness of sterically frustrated Lewis acids and bases with a polymer scaffold to create self-healing gels and recyclable catalysts. However, their utilization in radical chemistry is unprecedented. In this paper, we disclose the synthesis of polymeric frustrated radical pairs, or poly(FRP)s, by in situ photoinduction of FLP moieties, where their Lewis acidic and basic centers are tuned to promote single electron transfer (SET). Through systematic manipulation of the chemical structure, we demonstrate that inclusion of ortho-methyl groups on phosphine monomers is crucial to enable SET. The generation of radicals is evidenced by monitoring the stable polymeric phosphine radical cations via UV/vis and EPR spectroscopy. These new poly(FRP)s enable both catalytic hydrogenation and radical-mediated photocatalytic perfluoroalkylations. These polymeric radical systems open new avenues to design novel functional polymers for catalysis and photoelectrical chemistry.
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Affiliation(s)
- Meng Wang
- Department
of Materials, School of Natural Sciences, University of Manchester, Manchester M13 9PL, U.K.
- Sustainable
Materials Innovation Hub, Henry Royce Institute, University of Manchester, Manchester M13 9PL, U.K.
| | - Muralidharan Shanmugam
- Photon
Science Institute, Department of Chemistry, The University of Manchester, Manchester M13 9PL, U.K.
| | - Eric J. L. McInnes
- Photon
Science Institute, Department of Chemistry, The University of Manchester, Manchester M13 9PL, U.K.
| | - Michael P. Shaver
- Department
of Materials, School of Natural Sciences, University of Manchester, Manchester M13 9PL, U.K.
- Sustainable
Materials Innovation Hub, Henry Royce Institute, University of Manchester, Manchester M13 9PL, U.K.
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30
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Mycroft C, Smith MJ, Nilsson M, Morris GA, Castañar L. Pure shift FESTA: An ultra-high resolution NMR tool for the analysis of complex fluorine-containing spin systems. Magn Reson Chem 2023; 61:606-614. [PMID: 37688573 DOI: 10.1002/mrc.5393] [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: 06/26/2023] [Revised: 08/17/2023] [Accepted: 08/18/2023] [Indexed: 09/11/2023]
Abstract
NMR measurements of molecules containing sparse fluorine atoms are becoming increasingly common due to their prevalence in medicinal chemistry. However, the presence of both homonuclear and heteronuclear scalar couplings severely complicates their analysis by NMR. In complex systems, FESTA, a heteronuclear spectral editing method, allows simplified 1 H NMR spectra to be obtained containing only 1 H signals from the same spin system as a chosen 19 F. Despite spectral simplification, signal overlap due to the presence of scalar couplings is often a problem in FESTA spectra. Here, we report a new experiment that combines FESTA and pure shift methods to provide fully decoupled ultra-high resolution FESTA spectra showing a single signal for each 1 H chemical environment. The utility of the method is demonstrated for the analysis of two complex fluorine-containing mixtures of pharmaceutical and biochemical interest.
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Affiliation(s)
- Coral Mycroft
- Department of Chemistry, University of Manchester, Manchester, UK
| | - Marshall J Smith
- Department of Chemistry, University of Manchester, Manchester, UK
| | - Mathias Nilsson
- Department of Chemistry, University of Manchester, Manchester, UK
| | - Gareth A Morris
- Department of Chemistry, University of Manchester, Manchester, UK
| | - Laura Castañar
- Department of Chemistry, University of Manchester, Manchester, UK
- Department of Organic Chemistry, Faculty of Chemical Science, Complutense University of Madrid, Madrid, Spain
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31
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Zghebi SS, Rutter MK, Sun LY, Ullah W, Rashid M, Ashcroft DM, Steinke DT, Weng S, Kontopantelis E, Mamas MA. Comorbidity clusters and in-hospital outcomes in patients admitted with acute myocardial infarction in the USA: A national population-based study. PLoS One 2023; 18:e0293314. [PMID: 37883354 PMCID: PMC10602297 DOI: 10.1371/journal.pone.0293314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Accepted: 10/09/2023] [Indexed: 10/28/2023] Open
Abstract
BACKGROUND The prevalence of multimorbidity in patients with acute myocardial infarction (AMI) is increasing. It is unclear whether comorbidities cluster into distinct phenogroups and whether are associated with clinical trajectories. METHODS Survey-weighted analysis of the United States Nationwide Inpatient Sample (NIS) for patients admitted with a primary diagnosis of AMI in 2018. In-hospital outcomes included mortality, stroke, bleeding, and coronary revascularisation. Latent class analysis of 21 chronic conditions was used to identify comorbidity classes. Multivariable logistic and linear regressions were fitted for associations between comorbidity classes and outcomes. RESULTS Among 416,655 AMI admissions included in the analysis, mean (±SD) age was 67 (±13) years, 38% were females, and 76% White ethnicity. Overall, hypertension, coronary heart disease (CHD), dyslipidaemia, and diabetes were common comorbidities, but each of the identified five classes (C) included ≥1 predominant comorbidities defining distinct phenogroups: cancer/coagulopathy/liver disease class (C1); least burdened (C2); CHD/dyslipidaemia (largest/referent group, (C3)); pulmonary/valvular/peripheral vascular disease (C4); diabetes/kidney disease/heart failure class (C5). Odds ratio (95% confidence interval [CI]) for mortality ranged between 2.11 (1.89-2.37) in C2 to 5.57 (4.99-6.21) in C1. For major bleeding, OR for C1 was 4.48 (3.78; 5.31); for acute stroke, ORs ranged between 0.75 (0.60; 0.94) in C2 to 2.76 (2.27; 3.35) in C1; for coronary revascularization, ORs ranged between 0.34 (0.32; 0.36) in C1 to 1.41 (1.30; 1.53) in C4. CONCLUSIONS We identified distinct comorbidity phenogroups that predicted in-hospital outcomes in patients admitted with AMI. Some conditions overlapped across classes, driven by the high comorbidity burden. Our findings demonstrate the predictive value and potential clinical utility of identifying patients with AMI with specific comorbidity clustering.
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Affiliation(s)
- Salwa S. Zghebi
- Centre for Primary Care and Health Services Research, Division of Population Health, Health Services Research and Primary Care, School of Health Sciences, The University of Manchester, Manchester, United Kingdom
- Department of Pharmaceutics, Faculty of Pharmacy, University of Tripoli, Tripoli, Libya
| | - Martin K. Rutter
- Diabetes, Endocrinology & Metabolism Centre, Manchester University NHS Foundation Trust, NIHR Manchester Biomedical Research Centre, Manchester Academic Health Science Centre, Manchester, United Kingdom
- Division of Diabetes, Endocrinology & Gastroenterology, School of Medical Sciences, The University of Manchester, Manchester, United Kingdom
| | - Louise Y. Sun
- Division of Cardiothoracic Anesthesiology, Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University School of Medicine, Palo Alto, California, United States of America
| | - Waqas Ullah
- Department of Cardiology, Thomas Jefferson University Hospitals, Philadelphia, Pennsylvania, United States of America
| | - Muhammad Rashid
- Keele Cardiovascular Research Group, Centre for Prognosis Research, School of Medicine, Keele University, Stoke‐on‐Trent, United Kingdom
- Department of Academic Cardiology, Royal Stoke University Hospital, Stoke‐on‐Trent, United Kingdom
| | - Darren M. Ashcroft
- Centre for Pharmacoepidemiology and Drug Safety, Division of Pharmacy and Optometry, School of Health Sciences, The University of Manchester, Manchester, United Kingdom
- NIHR Greater Manchester Patient Safety Research Collaboration (PSRC), The University of Manchester, Manchester, United Kingdom
| | - Douglas T. Steinke
- Centre for Pharmacoepidemiology and Drug Safety, Division of Pharmacy and Optometry, School of Health Sciences, The University of Manchester, Manchester, United Kingdom
| | - Stephen Weng
- Development Biostatistics, GSK, Stevenage, United Kingdom
| | - Evangelos Kontopantelis
- Centre for Primary Care and Health Services Research, Division of Population Health, Health Services Research and Primary Care, School of Health Sciences, The University of Manchester, Manchester, United Kingdom
- Division of Informatics, Imaging and Data Sciences, School of Health Sciences, The University of Manchester, Manchester, United Kingdom
| | - Mamas A. Mamas
- Keele Cardiovascular Research Group, Centre for Prognosis Research, School of Medicine, Keele University, Stoke‐on‐Trent, United Kingdom
- Department of Academic Cardiology, Royal Stoke University Hospital, Stoke‐on‐Trent, United Kingdom
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32
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Huang P, Ahamed A, Sun R, De Hoe GX, Pitcher J, Mushing A, Lourenço F, Shaver MP. Circularizing PET-G Multimaterials: Life Cycle Assessment and Techno-Economic Analysis. ACS Sustain Chem Eng 2023; 11:15328-15337. [PMID: 37886038 PMCID: PMC10598876 DOI: 10.1021/acssuschemeng.3c04047] [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] [Figures] [Subscribe] [Scholar Register] [Received: 07/02/2023] [Revised: 10/01/2023] [Indexed: 10/28/2023]
Abstract
The recycling of multimaterials such as payment or access cards poses significant challenges. Building on previous experimental work demonstrating the feasibility of chemically recyclable payment cards made from glycol-modified poly(ethylene terephthalate) (PET-G), we use life cycle assessment and techno-economic analysis to investigate two chemical recycling scenarios and evaluate their potential environmental and economic benefits. Recovering all components from the depolymerized products (Scenario 1) achieves substantial environmental benefits across most categories, reducing global warming by up to 67% compared to only recovering major components (Scenario 2). However, the environmental benefits in Scenario 1 incur 69% higher total annualized costs, causing its profitability to be dependent on a minimum selling price of £13.4/kg for cyclohexanedimethanol and less than a 10% discount rate. In contrast, Scenario 2 is less sensitive to discount rate variation and thus a lower risk and more economically feasible option, albeit less environmentally sustainable.
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Affiliation(s)
- Peng Huang
- Department
of Materials, Henry Royce Institute, The
University of Manchester, Manchester M13 9PL, U.K.
| | - Ashiq Ahamed
- Pragmatic
Semiconductor Ltd., Cambridge CB4 0WH, U.K.
| | - Ruitao Sun
- School
of Engineering, The University of Manchester, Manchester M13 9PL, U.K.
| | - Guilhem X. De Hoe
- Department
of Materials, Henry Royce Institute, The
University of Manchester, Manchester M13 9PL, U.K.
| | - Joe Pitcher
- Mastercard
DigiSec Lab, 5 Booths Park, Chelford Road, Knutsford WA16 8QZ, U.K.
| | - Alan Mushing
- Mastercard
DigiSec Lab, 5 Booths Park, Chelford Road, Knutsford WA16 8QZ, U.K.
| | - Fernando Lourenço
- Mastercard
DigiSec Lab, 5 Booths Park, Chelford Road, Knutsford WA16 8QZ, U.K.
| | - Michael P. Shaver
- Department
of Materials, Henry Royce Institute, The
University of Manchester, Manchester M13 9PL, U.K.
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Vitali T, Sanchez-Alvarez R, Witkos TM, Bantounas I, Cutiongco MFA, Dudek M, Yan G, Mironov AA, Swift J, Lowe M. Vimentin intermediate filaments provide structural stability to the mammalian Golgi complex. J Cell Sci 2023; 136:jcs260577. [PMID: 37732478 PMCID: PMC10617613 DOI: 10.1242/jcs.260577] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Accepted: 09/18/2023] [Indexed: 09/22/2023] Open
Abstract
The Golgi complex comprises a connected ribbon of stacked cisternal membranes localized to the perinuclear region in most vertebrate cells. The position and morphology of this organelle depends upon interactions with microtubules and the actin cytoskeleton. In contrast, we know relatively little about the relationship of the Golgi complex with intermediate filaments (IFs). In this study, we show that the Golgi is in close physical proximity to vimentin IFs in cultured mouse and human cells. We also show that the trans-Golgi network coiled-coil protein GORAB can physically associate with vimentin IFs. Loss of vimentin and/or GORAB had a modest effect upon Golgi structure at the steady state. The Golgi underwent more rapid disassembly upon chemical disruption with brefeldin A or nocodazole, and slower reassembly upon drug washout, in vimentin knockout cells. Moreover, loss of vimentin caused reduced Golgi ribbon integrity when cells were cultured on high-stiffness hydrogels, which was exacerbated by loss of GORAB. These results indicate that vimentin IFs contribute to the structural stability of the Golgi complex and suggest a role for GORAB in this process.
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Affiliation(s)
- Teresa Vitali
- School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, The Michael Smith Building, Oxford Road, Manchester M13 9PT, UK
| | - Rosa Sanchez-Alvarez
- School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, The Michael Smith Building, Oxford Road, Manchester M13 9PT, UK
| | - Tomasz M. Witkos
- School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, The Michael Smith Building, Oxford Road, Manchester M13 9PT, UK
| | - Ioannis Bantounas
- School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, The Michael Smith Building, Oxford Road, Manchester M13 9PT, UK
| | - Marie F. A. Cutiongco
- Wellcome Centre for Cell-Matrix Research, University of Manchester, Manchester M13 9PT, UK
| | - Michal Dudek
- Wellcome Centre for Cell-Matrix Research, University of Manchester, Manchester M13 9PT, UK
| | - Guanhua Yan
- School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, The Michael Smith Building, Oxford Road, Manchester M13 9PT, UK
| | - Alexander A. Mironov
- Electron Microscopy Core Facility, Faculty of Biology, Medicine and Health, University of Manchester, The Michael Smith Building, Oxford Road, Manchester M13 9PT, UK
| | - Joe Swift
- Wellcome Centre for Cell-Matrix Research, University of Manchester, Manchester M13 9PT, UK
| | - Martin Lowe
- School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, The Michael Smith Building, Oxford Road, Manchester M13 9PT, UK
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Roy R, Leadbitter K, Shields G, Taylor C, Aldred C, Juneja M, Gulati S, Vajaratkar V, Davies L, Emsley R, Patel V, Divan G, Green J. A randomised controlled trial of clinical and cost-effectiveness of the PASS Plus intervention for young children with autism spectrum disorder in New Delhi, India: study protocol for the COMPASS trial. Trials 2023; 24:667. [PMID: 37828540 PMCID: PMC10571330 DOI: 10.1186/s13063-023-07621-5] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Accepted: 09/04/2023] [Indexed: 10/14/2023] Open
Abstract
BACKGROUND Autism Spectrum Disorder (ASD) is a neurodevelopmental disability affecting at least 5 million children in South Asia. Majority of these children are without access to evidence-based care. The UK Pre-school Autism Communication Therapy (PACT) is the only intervention to have shown sustained impact on autism symptoms. It was systematically adapted for non-specialist community delivery in South Asia, as the 'Parent-mediated Autism Social Communication Intervention for non-Specialists (PASS)' and extended 'PASS Plus' interventions. RCTs of both showed feasibility, acceptability and positive effect on parent and child dyadic outcomes. METHODS The Communication-centred Parent-mediated treatment for Autism Spectrum Disorder in South Asia (COMPASS) trial is now a scale-up two-centre, two-arm single (rater) blinded random allocation parallel group study of the PASS Plus intervention in addition to treatment as usual (TAU) compared to TAU alone, plus health economic evaluation embedded in the India health system. Two hundred forty children (approximately 120 intervention/120 TAU) with ASD aged 2-9 years will be recruited from two tertiary care government hospitals in New Delhi, India. Accredited Social Health Activists will be one of the intervention delivery agents. Families will undertake up to 12 communication sessions over 8 months and will be offered the Plus modules which address coexisting problems. The trial's primary endpoint is at 9 months from randomisation, with follow-up at 15 months. The primary outcome is autism symptom severity; secondary outcomes include parent-child communication, child adaptation, quality of life and parental wellbeing. Primary analysis will follow intention-to-treat principles using linear mixed model regressions with group allocation and repeated measures as random effects. The cost-effectiveness analysis will use a societal perspective over the 15-month period of intervention and follow-up. DISCUSSION If clinically and cost-effective, this programme will fill an important gap of scalable interventions delivered by non-specialist health workers within the current care pathways for autistic children and their families in low-resource contexts. The programme has been implemented through the COVID-19 pandemic when restrictions were in place; intervention delivery and evaluation processes have been adapted to address these conditions. TRIAL REGISTRATION ISRCTN; ISRCTN21454676 ; Registered 22 June 2018.
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Affiliation(s)
| | | | | | | | | | - Monica Juneja
- Maulana Azad Medical College and Associated Lok Nayak Hospital, Delhi, India
| | | | | | | | - Richard Emsley
- Department of Biostatistics and Health Informatics, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | | | | | - Jonathan Green
- University of Manchester, Manchester, UK
- Royal Manchester Children's Hospital, Manchester, UK
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35
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Buckingham MA, Skelton JM, Lewis DJ. Synthetic Strategies toward High Entropy Materials: Atoms-to-Lattices for Maximum Disorder. Cryst Growth Des 2023; 23:6998-7009. [PMID: 37808901 PMCID: PMC10557048 DOI: 10.1021/acs.cgd.3c00712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 08/03/2023] [Indexed: 10/10/2023]
Abstract
High-entropy materials are a nascent class of materials that exploit a high configurational entropy to stabilize multiple elements in a single crystal lattice and to yield unique physical properties for applications in energy storage, catalysis, and thermoelectric energy conversion. Initially, the synthesis of these materials was conducted by approaches requiring high temperatures and long synthetic time scales. However, successful homogeneous mixing of elements at the atomic level within the lattice remains challenging, especially for the synthesis of nanomaterials. The use of atom-up synthetic approaches to build crystal lattices atom by atom, rather than the top-down alteration of extant crystalline lattices, could lead to faster, lower-temperature, and more sustainable approaches to obtaining high entropy materials. In this Perspective, we discuss some of these state-of-the-art atom-up synthetic approaches to high entropy materials and contrast them with more traditional approaches.
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Affiliation(s)
- Mark A. Buckingham
- Department
of Materials, The University of Manchester, Oxford Road, Manchester, M13 9PL, United
Kingdom
| | - Jonathan M. Skelton
- Department
of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, United
Kingdom
| | - David J. Lewis
- Department
of Materials, The University of Manchester, Oxford Road, Manchester, M13 9PL, United
Kingdom
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36
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Ma Y, Han X, Xu S, Li Z, Lu W, An B, Lee D, Chansai S, Sheveleva AM, Wang Z, Chen Y, Li J, Li W, Cai R, da Silva I, Cheng Y, Daemen LL, Tuna F, McInnes EJL, Hughes L, Manuel P, Ramirez-Cuesta AJ, Haigh SJ, Hardacre C, Schröder M, Yang S. Direct Conversion of Methane to Ethylene and Acetylene over an Iron-Based Metal-Organic Framework. J Am Chem Soc 2023; 145:20792-20800. [PMID: 37722104 PMCID: PMC10540182 DOI: 10.1021/jacs.3c03935] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2023] [Indexed: 09/20/2023]
Abstract
Conversion of methane (CH4) to ethylene (C2H4) and/or acetylene (C2H2) enables routes to a wide range of products directly from natural gas. However, high reaction temperatures and pressures are often required to activate and convert CH4 controllably, and separating C2+ products from unreacted CH4 can be challenging. Here, we report the direct conversion of CH4 to C2H4 and C2H2 driven by non-thermal plasma under ambient (25 °C and 1 atm) and flow conditions over a metal-organic framework material, MFM-300(Fe). The selectivity for the formation of C2H4 and C2H2 reaches 96% with a high time yield of 334 μmol gcat-1 h-1. At a conversion of 10%, the selectivity to C2+ hydrocarbons and time yield exceed 98% and 2056 μmol gcat-1 h-1, respectively, representing a new benchmark for conversion of CH4. In situ neutron powder diffraction, inelastic neutron scattering and solid-state nuclear magnetic resonance, electron paramagnetic resonance (EPR), and diffuse reflectance infrared Fourier transform spectroscopies, coupled with modeling studies, reveal the crucial role of Fe-O(H)-Fe sites in activating CH4 and stabilizing reaction intermediates via the formation of an Fe-O(CH3)-Fe adduct. In addition, a cascade fixed-bed system has been developed to achieve online separation of C2H4 and C2H2 from unreacted CH4 for direct use. Integrating the processes of CH4 activation, conversion, and product separation within one system opens a new avenue for natural gas utility, bridging the gap between fundamental studies and practical applications in this area.
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Affiliation(s)
- Yujie Ma
- Department
of Chemistry, University of Manchester, Manchester M13 9PL, U.K.
| | - Xue Han
- Department
of Chemistry, University of Manchester, Manchester M13 9PL, U.K.
- College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Shaojun Xu
- Department
of Chemical Engineering, University of Manchester, Manchester M13 9PL, U.K.
| | - Zhe Li
- The
Francis Crick Institute, London NW1 1AT, U.K.
- Department
of Chemistry, King’s College London, London WC2R 2LS, U.K.
| | - Wanpeng Lu
- Department
of Chemistry, University of Manchester, Manchester M13 9PL, U.K.
| | - Bing An
- Department
of Chemistry, University of Manchester, Manchester M13 9PL, U.K.
| | - Daniel Lee
- Department
of Chemical Engineering, University of Manchester, Manchester M13 9PL, U.K.
| | - Sarayute Chansai
- Department
of Chemical Engineering, University of Manchester, Manchester M13 9PL, U.K.
| | - Alena M. Sheveleva
- Department
of Chemistry, University of Manchester, Manchester M13 9PL, U.K.
- Photon
Science Institute, University of Manchester, Manchester M13 9PL, U.K.
| | - Zi Wang
- Department
of Chemistry, University of Manchester, Manchester M13 9PL, U.K.
| | - Yinlin Chen
- Department
of Chemistry, University of Manchester, Manchester M13 9PL, U.K.
| | - Jiangnan Li
- Department
of Chemistry, University of Manchester, Manchester M13 9PL, U.K.
| | - Weiyao Li
- Department
of Chemistry, University of Manchester, Manchester M13 9PL, U.K.
| | - Rongsheng Cai
- Department
of Materials, University of Manchester, Manchester M13 9PL, U.K.
| | - Ivan da Silva
- ISIS
Facility, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Chilton OX11 0QX, U.K.
| | - Yongqiang Cheng
- Neutron
Scattering Division, Neutron Sciences Directorate, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Luke L. Daemen
- Neutron
Scattering Division, Neutron Sciences Directorate, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Floriana Tuna
- Department
of Chemistry, University of Manchester, Manchester M13 9PL, U.K.
- Photon
Science Institute, University of Manchester, Manchester M13 9PL, U.K.
| | - Eric J. L. McInnes
- Department
of Chemistry, University of Manchester, Manchester M13 9PL, U.K.
- Photon
Science Institute, University of Manchester, Manchester M13 9PL, U.K.
| | - Lewis Hughes
- Department
of Earth and Environmental Sciences, University
of Manchester, Manchester M13 9PL, U.K.
| | - Pascal Manuel
- ISIS
Facility, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Chilton OX11 0QX, U.K.
| | - Anibal J. Ramirez-Cuesta
- Neutron
Scattering Division, Neutron Sciences Directorate, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Sarah J. Haigh
- Department
of Materials, University of Manchester, Manchester M13 9PL, U.K.
| | - Christopher Hardacre
- Department
of Chemical Engineering, University of Manchester, Manchester M13 9PL, U.K.
| | - Martin Schröder
- Department
of Chemistry, University of Manchester, Manchester M13 9PL, U.K.
| | - Sihai Yang
- Department
of Chemistry, University of Manchester, Manchester M13 9PL, U.K.
- College
of Chemistry and Molecular Engineering, Beijing National Laboratory
for Molecular Sciences, Peking University, Beijing 100871, China
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Abstract
Mechanophores (mechanosensitive molecules) have been instrumental in the development of various force-controlled release systems. However, the release of functional organic molecules is often the consequence of a secondary (nonmechanical) process triggered by an initial bond scission. Here we present a new mechanophore, built around an oxanorbornane-triazoline core, that is able to release a furan molecule following a force-promoted double retro-[4+2][3+2] cycloaddition. We explored this unprecedented transformation experimentally (sonication) and computationally (DFT, CoGEF) and found that the observed reactivity is controlled by the geometry of the adduct, as this reaction pathway is only accessible to the endo-exo-cis isomer. These results further demonstrate the unique reactivity of molecules under tension and offer a new mechanism for the force-controlled release of small molecules.
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Affiliation(s)
- Kamil Suwada
- Department of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, United
Kingdom
| | - Alice Weng Ieong
- Department of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, United
Kingdom
| | - Hei Lok Herman Lo
- Department of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, United
Kingdom
| | - Guillaume De Bo
- Department of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, United
Kingdom
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Nawaz S, Khan Y, Khalid S, Malik MA, Siddiq M. Molybdenum disulfide (MoS 2) along with graphene nanoplatelets (GNPs) utilized to enhance the capacitance of conducting polymers (PANI and PPy). RSC Adv 2023; 13:28785-28797. [PMID: 37790101 PMCID: PMC10543645 DOI: 10.1039/d3ra04153k] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Accepted: 09/14/2023] [Indexed: 10/05/2023] Open
Abstract
Hybrid composites of molybdenum disulfide (MoS2), graphene nanoplatelets (GNPs) and polyaniline (PANI)/polypyrrole (PPy) have been synthesized as cost-effective electrode materials for supercapacitors. We have produced MoS2 from molybdenum dithiocarbamate by a melt method in an inert environment and then used a liquid exfoliation method to form its composite with graphene nanoplatelets (GNPs) and polymers (PANI and PPy). The MoS2 melt/GNP ratio in the resultant composites was 1 : 3 and the polymer was 10% by wt. of the original composite. XRD (X-ray diffraction analysis) confirmed the formation of MoS2 and SEM (scanning electron microscopy) revealed the morphology of the synthesized materials. The electrochemical charge storage performance of the synthesized composite materials was assessed by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and galvanostatic charge/discharge (GCCD) measurements. Resultant composites showed enhanced electrochemical performances (specific capacitance = 236.23 F g-1, energy density = 64.31 W h kg-1 and power density = 3858.42 W kg-1 for MoS2 melt 5 mPP at a current density of 0.57 A g-1 and had 91.87% capacitance retention after 10 000 charge-discharge cycles) as compared to the produced MoS2; thus, they can be utilized as electrode materials for supercapacitors.
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Affiliation(s)
- Saima Nawaz
- Department of Chemistry, Quaid-i-Azam University Islamabad 45320 Pakistan +92 5190642147
- Nanoscience and Technology Department, National Centre for Physics, QAU Campus Shahdra Valley Road Islamabad 45320 Pakistan
| | - Yaqoob Khan
- Nanoscience and Technology Department, National Centre for Physics, QAU Campus Shahdra Valley Road Islamabad 45320 Pakistan
| | - Sadia Khalid
- Nanoscience and Technology Department, National Centre for Physics, QAU Campus Shahdra Valley Road Islamabad 45320 Pakistan
| | - Mohammad Azad Malik
- Department of Chemistry, University of Zululand Private Bag X1001 KwaDlangezwa 3880 South Africa +44 7403781143
| | - Muhammad Siddiq
- Department of Chemistry, Quaid-i-Azam University Islamabad 45320 Pakistan +92 5190642147
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Mycroft C, Dal Poggetto G, Barbosa TM, Tormena C, Nilsson M, Morris GA, Castañar L. Rapid Measurement of Heteronuclear Coupling Constants in Complex NMR Spectra. J Am Chem Soc 2023; 145:19824-19831. [PMID: 37650656 PMCID: PMC10510310 DOI: 10.1021/jacs.3c05515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Indexed: 09/01/2023]
Abstract
The NMR analysis of fluorine-containing molecules, increasingly widespread due to their importance in pharmaceuticals and biochemistry, poses significant challenges. Severe peak overlap in the proton spectrum often hinders the extraction of critical structural information in the form of heteronuclear scalar coupling constants, which are crucial for determining pharmaceutical properties and biological activity. Here, a new method, IPAP-FESTA, is reported that drastically simplifies measurements of the signs and magnitudes of proton-fluorine couplings. Its usefulness is demonstrated for the structural study of the steroidal drug fluticasone propionate extracted from a commercial formulation and for assessing solvent effects on the conformational equilibrium in a physically inseparable fluorohydrin mixture.
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Affiliation(s)
- Coral Mycroft
- Department
of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
- Chemistry
Research Laboratory, Department of Chemistry, University of Oxford, Oxford, OX1 3TA, United
Kingdom
| | - Guilherme Dal Poggetto
- Chemistry
Institute, University of Campinas −
UNICAMP, P.O. Box 6154, 13083-970 Campinas, SP, Brazil
- Analytical
Research & Development, Merck &
Co., Inc., 126 Lincoln Avenue, Rahway, New Jersey 07065, United States
| | - Thaís M. Barbosa
- Chemistry
Institute, University of Campinas −
UNICAMP, P.O. Box 6154, 13083-970 Campinas, SP, Brazil
- Nanalysis
Corp., 1-4600 5 Street NE, Calgary, Alberta, Canada T2E 7C3
| | - Cláudio
F. Tormena
- Chemistry
Institute, University of Campinas −
UNICAMP, P.O. Box 6154, 13083-970 Campinas, SP, Brazil
| | - Mathias Nilsson
- Department
of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
| | - Gareth A. Morris
- Department
of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
| | - Laura Castañar
- Department
of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
- Department
of Organic Chemistry, Faculty of Chemical Science, Complutense University of Madrid, Ciudad Universitaria s/n, 28040 Madrid, Spain
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40
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Correction to: Heightened COVID-19 Mortality in People With Severe Mental Illness Persists After Vaccination: A Cohort Study of Greater Manchester Residents. Schizophr Bull 2023; 49:1399-403. [PMID: 37339261 DOI: 10.1093/schbul/sbad036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/22/2023]
Abstract
BACKGROUND AND HYPOTHESIS Previous studies show that people with severe mental illness (SMI) are at higher risk of COVID-19 mortality, however limited evidence exists regarding risk post-vaccination. We investigated COVID-19 mortality among people with schizophrenia and other SMIs before, during and after the UK vaccine roll-out. STUDY DESIGN Using the Greater Manchester (GM) Care Record to access routinely collected health data linked with death records, we plotted COVID-19 mortality rates over time in GM residents with schizophrenia/psychosis, bipolar disorder (BD) and/or recurrent major depressive disorder (MDD) from February 2020 to September 2021. Multivariable logistic regression was used to compare mortality risk (risk ratios; RRs) between people with SMI (N=190,188) and age-sex matched controls (N=760,752), adjusted for sociodemographic factors, pre-existing comorbidities and vaccination status. STUDY RESULTS Mortality risks were significantly higher among people with SMI compared with matched controls, particularly among people with schizophrenia/psychosis (RR 3.14, CI 2.66-3.71) and/or BD (RR 3.17, CI 2.15-4.67). In adjusted models, the relative risk of COVID-19 mortality decreased, though remained significantly higher than matched controls for people with schizophrenia (RR 1.53, CI 1.24-1.88) and BD (RR 2.28, CI 1.49-3.49), but not recurrent MDD (RR 0.92, CI 0.78-1.09). People with SMI continued to show higher mortality rate ratios relative to controls throughout 2021, during vaccination roll-out. CONCLUSIONS People with SMI, notably schizophrenia and bipolar disorder, were at greater risk of COVID-19 mortality compared to matched controls. Despite population vaccination efforts that have prioritised people with SMI, disparities still remain in COVID-19 mortality for people with SMI.
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41
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Chen J, An B, Chen Y, Han X, Mei Q, He M, Cheng Y, Vitorica-Yrezabal IJ, Natrajan LS, Lee D, Ramirez-Cuesta AJ, Yang S, Schröder M. Ultra-fast Proton Conduction and Photocatalytic Water Splitting in a Pillared Metal-Organic Framework. J Am Chem Soc 2023; 145:19225-19231. [PMID: 37606549 PMCID: PMC10485888 DOI: 10.1021/jacs.3c03943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2023] [Indexed: 08/23/2023]
Abstract
Proton-exchange membrane fuel cells enable the portable utilization of hydrogen (H2) as an energy resource. Current electrolytic materials have limitation, and there is an urgent need to develop new materials showing especially high proton conductivity. Here, we report the ultra-fast proton conduction in a novel metal-organic framework, MFM-808, which adopts an unprecedented topology and a unique structure consisting of two-dimensional layers of {Zr6}-clusters. By replacing the bridging formate with sulfate ligands within {Zr6}-layers, the modified MFM-808-SO4 exhibits an exceptional proton conductivity of 0.21 S·cm-1 at 85 °C and 99% relative humidity. Modeling by molecular dynamics confirms that proton transfer is promoted by an efficient two-dimensional conducting network assembled by sulfate-{Zr6}-layers. MFM-808-SO4 also possesses excellent photocatalytic activity for water splitting to produce H2, paving a new pathway to achieve a renewable hydrogen-energy cycle.
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Affiliation(s)
- Jin Chen
- Department
of Chemistry, The University of Manchester, Manchester M13 9PL, U.K.
| | - Bing An
- Department
of Chemistry, The University of Manchester, Manchester M13 9PL, U.K.
| | - Yinlin Chen
- Department
of Chemistry, The University of Manchester, Manchester M13 9PL, U.K.
| | - Xue Han
- Department
of Chemistry, The University of Manchester, Manchester M13 9PL, U.K.
| | - Qingqing Mei
- Department
of Chemistry, The University of Manchester, Manchester M13 9PL, U.K.
| | - Meng He
- Department
of Chemistry, The University of Manchester, Manchester M13 9PL, U.K.
| | - Yongqiang Cheng
- Neutron
Scattering Division, Neutron Sciences Directorate, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | | | - Louise S. Natrajan
- Department
of Chemistry, The University of Manchester, Manchester M13 9PL, U.K.
| | - Daniel Lee
- Department
of Chemical Engineering and Analytical Science, University of Manchester, Manchester M13 9PL, U.K.
| | - Anibal J. Ramirez-Cuesta
- Neutron
Scattering Division, Neutron Sciences Directorate, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Sihai Yang
- Department
of Chemistry, The University of Manchester, Manchester M13 9PL, U.K.
- College
of Chemistry and Molecular Engineering, Beijing National Laboratory
for Molecular Sciences, Peking University, Beijing 100871, China
| | - Martin Schröder
- Department
of Chemistry, The University of Manchester, Manchester M13 9PL, U.K.
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42
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Tong F, Lederman R, D'Alfonso S, Berry K, Bucci S. Conceptualizing the digital therapeutic alliance in the context of fully automated mental health apps: A thematic analysis. Clin Psychol Psychother 2023; 30:998-1012. [PMID: 37042076 DOI: 10.1002/cpp.2851] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 03/24/2023] [Accepted: 03/27/2023] [Indexed: 04/13/2023]
Abstract
Fully automated mental health apps provide a promising opportunity for increasing access to mental health care and resources. Given this opportunity, continued research into the utility and effectiveness of mental health apps is crucial. Therapeutic alliance (TA) refers to the relationship between a client and a healthcare professional, and has been shown to be an important predictor of clinical outcomes in face-to-face therapy. Given the significance of TA in traditional therapy, it is important to explore whether the notion of a digital therapeutic alliance (DTA) in the context of fully automated mental health apps also plays an important role in clinical outcomes. Current evidence shows that the conceptualization of DTA in the context of fully automated mental health apps can be potentially different to TA in face-to-face therapy. Thus, a new DTA conceptual model is necessary for comprehensively understanding the mechanisms underpinning DTA for fully automated mental health apps. To the best of our knowledge, this is the first study that qualitatively explored the dimensions of a DTA in the context of fully automated mental health apps. We conducted interviews with 20 users of mental health apps to explore the key dimensions comprising DTA in the context of fully automated mental health apps. We found that although conceptualizations of DTA and TA have shared dimensions, flexibility and emotional experiences are unique domains in DTA. On the other hand, although agreement on goals between a therapist and a client is important in face to face therapy, we found that users can have an alliance with an app without a goal. The importance of goal needs further investigations.
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Affiliation(s)
- Fangziyun Tong
- School of Computing and Information Systems, University of Melbourne, Parkville, Victoria, USA
- Division of Psychology and Mental Health, School of Health Sciences, Manchester Academic Health Sciences Centre, University of Manchester, Manchester, UK
| | - Reeva Lederman
- School of Computing and Information Systems, University of Melbourne, Parkville, Victoria, USA
| | - Simon D'Alfonso
- School of Computing and Information Systems, University of Melbourne, Parkville, Victoria, USA
| | - Katherine Berry
- Division of Psychology and Mental Health, School of Health Sciences, Manchester Academic Health Sciences Centre, University of Manchester, Manchester, UK
- Complex Trauma and Resilience Research Unit, Greater Manchester Mental Health NHS Foundation Trust, Manchester, UK
| | - Sandra Bucci
- Division of Psychology and Mental Health, School of Health Sciences, Manchester Academic Health Sciences Centre, University of Manchester, Manchester, UK
- Complex Trauma and Resilience Research Unit, Greater Manchester Mental Health NHS Foundation Trust, Manchester, UK
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Alabas OA, Mason KJ, Yiu ZZN, Warren RB, Lunt M, Smith CH, Griffiths CEM. Effectiveness and survival of methotrexate versus adalimumab in patients with moderate-to-severe psoriasis: a cohort study from the British Association of Dermatologists Biologics and Immunomodulators Register (BADBIR). Br J Dermatol 2023; 189:271-278. [PMID: 37226927 DOI: 10.1093/bjd/ljad179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Revised: 03/18/2023] [Accepted: 05/22/2023] [Indexed: 05/26/2023]
Abstract
BACKGROUND Most information on the comparative effectiveness and survival of methotrexate (MTX) and adalimumab (ADA) in the treatment of psoriasis is from randomized control trials and may not translate to the everyday clinical setting. OBJECTIVES To determine the real-world effectiveness and survival of MTX and ADA in patients with moderate-to-severe psoriasis registered in the British Association of Dermatologists Biologics and Immunomodulators Register (BADBIR). METHODS Eligible patients were registered in BADBIR, ≥ 16 years of age and receiving a first course of MTX or ADA between September 2007 and December 2021, with ≥ 6 months of follow-up. Effectiveness was defined as achieving an absolute Psoriasis Area and Severity Index (PASI) ≤ 2 reported ≥ 13 weeks after the treatment start date until the stop date. The average treatment effect (ATE) was estimated using inverse probability of treatment weighting with propensity score, including baseline covariates. ATE results were presented as risk ratios (RR). A flexible parametric model was used to estimate adjusted standardized average survival, defined as treatment discontinuation associated with ineffectiveness or the occurrence of adverse events (AEs) at 6, 12 and 24 months. Restricted mean survival time (RMST) at 2 years of treatment exposure was calculated. RESULTS In total, 6575 patients (median age 44 years; 44% female) were analysed; 2659 (40.4%) were prescribed MTX and 3916 (59.5%) ADA. The proportion of patients achieving PASI ≤ 2 was higher in the ADA cohort (77.4%) than in the MTX cohort (37.4%). ADA was more effective than MTX [RR 2.20, 95% confidence interval (CI) 1.98-2.45]. Overall survival associated with ineffectiveness or AEs was lower in the MTX cohort than in the ADA cohort at 6 months [survival estimate 69.7 (95% CI 67.9-71.5) vs. 90.6 (95% CI 89.8-91.4)], 1 year [survival estimate 52.5 (95% CI 50.4-54.8) vs. 80.6 (95% CI 79.5-81.8)] and 2 years [survival estimate 34.8 (95% CI 32.5-37.2) vs. 68.6 (95% CI 67.2-70.0)]. The difference in RMST (years) overall, or when stratified by ineffectiveness and AEs, was 0.53 (95% CI 0.49-0.58), 0.37 (95% CI 0.33-0.42) and 0.29 (95% CI 0.25-0.33), respectively. CONCLUSIONS Patients on ADA were twice as likely to be clear or nearly clear of psoriasis and were less likely to discontinue their medication than patients on MTX. Findings from this real-world cohort provide important information to aid clinicians managing patients with psoriasis.
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Affiliation(s)
- Oras A Alabas
- Centre for Dermatology Research, University of Manchester, NIHR Manchester Biomedical Research Centre, Manchester, UK
| | - Kayleigh J Mason
- Primary Care Centre Versus Arthritis, School of Medicine, Keele University, Keele, UK
| | - Zenas Z N Yiu
- Centre for Dermatology Research, University of Manchester, NIHR Manchester Biomedical Research Centre, Manchester, UK
| | - Richard B Warren
- Centre for Dermatology Research, University of Manchester, NIHR Manchester Biomedical Research Centre, Manchester, UK
| | - Mark Lunt
- Centre for Dermatology Research, University of Manchester, NIHR Manchester Biomedical Research Centre, Manchester, UK
| | - Catherine H Smith
- St John's Institute of Dermatology, Guy's and St Thomas' NHS Foundation Trust and King's College London, London, UK
| | - Christopher E M Griffiths
- Centre for Dermatology Research, University of Manchester, NIHR Manchester Biomedical Research Centre, Manchester, UK
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44
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Kragskow JGC, Mattioni A, Staab JK, Reta D, Skelton JM, Chilton NF. Spin-phonon coupling and magnetic relaxation in single-molecule magnets. Chem Soc Rev 2023; 52:4567-4585. [PMID: 37377351 PMCID: PMC10351214 DOI: 10.1039/d2cs00705c] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Indexed: 06/29/2023]
Abstract
Electron-phonon coupling is important in many physical phenomena, e.g. photosynthesis, catalysis and quantum information processing, but its impacts are difficult to grasp on the microscopic level. One area attracting wide interest is that of single-molecule magnets, which is motivated by searching for the ultimate limit in the miniaturisation of binary data storage media. The utility of a molecule to store magnetic information is quantified by the timescale of its magnetic reversal processes, also known as magnetic relaxation, which is limited by spin-phonon coupling. Several recent accomplishments of synthetic organometallic chemistry have led to the observation of molecular magnetic memory effects at temperatures above that of liquid nitrogen. These discoveries have highlighted how far chemical design strategies for maximising magnetic anisotropy have come, but have also highlighted the need to characterise the complex interplay between phonons and molecular spin states. The crucial step is to make a link between magnetic relaxation and chemical motifs, and so be able to produce design criteria to extend molecular magnetic memory. The basic physics associated with spin-phonon coupling and magnetic relaxation was outlined in the early 20th century using perturbation theory, and has more recently been recast in the form of a general open quantum systems formalism and tackled with different levels of approximations. It is the purpose of this Tutorial Review to introduce the topics of phonons, molecular spin-phonon coupling, and magnetic relaxation, and to outline the relevant theories in connection with both the traditional perturbative texts and the more modern open quantum systems methods.
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Affiliation(s)
- Jon G C Kragskow
- Department of Chemistry, The University of Manchester, Manchester, M13 9PL, UK.
| | - Andrea Mattioni
- Department of Chemistry, The University of Manchester, Manchester, M13 9PL, UK.
| | - Jakob K Staab
- Department of Chemistry, The University of Manchester, Manchester, M13 9PL, UK.
| | - Daniel Reta
- Department of Chemistry, The University of Manchester, Manchester, M13 9PL, UK.
- Faculty of Chemistry, The University of the Basque Country UPV/EHU, Donostia, 20018, Spain
- Donostia International Physics Center (DIPC), Donostia, 20018, Spain
- IKERBASQUE, Basque Foundation for Science, Bilbao, 48013, Spain
| | - Jonathan M Skelton
- Department of Chemistry, The University of Manchester, Manchester, M13 9PL, UK.
| | - Nicholas F Chilton
- Department of Chemistry, The University of Manchester, Manchester, M13 9PL, UK.
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45
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Phan DB, Jourdain H, González-Quesada A, Zureik M, Rivera-Díaz R, Sahuquillo-Torralba A, Descalzo-Gallego MA, Lunt M, Garcia-Doval I, Sbidian E, Warren RB, Yiu ZZN. Drug survival and safety of biosimilars and originator adalimumab in the treatment of psoriasis: a multinational cohort study. BMJ Open 2023; 13:e075197. [PMID: 37451726 PMCID: PMC10351260 DOI: 10.1136/bmjopen-2023-075197] [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] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Accepted: 07/03/2023] [Indexed: 07/18/2023] Open
Abstract
INTRODUCTION Psoriasis is a chronic inflammatory skin disease. Adalimumab is an effective but previously expensive biological treatment for psoriasis. The introduction of biosimilars following the patent expiry of the originator adalimumab Humira has reduced the unit cost of treatment. However, the long-term effectiveness and safety of adalimumab biosimilars for treating psoriasis in real-world settings are uncertain and may be a barrier to widespread usage. METHODS AND ANALYSIS This study aims to compare the drug survival and safety of adalimumab biosimilars to adalimumab originator for the treatment of psoriasis. We will use both routinely collected healthcare databases and dedicated pharmacovigilance registries from the PsoNet initiative, including data from the UK, France and Spain. We will conduct a cohort study using a prevalent new user design. We will match patients on previous adalimumab exposure time to create two equal-sized cohorts of biosimilar and originator users. The coprimary outcomes are drug survival, defined by the time from cohort entry to discontinuation of the drug of interest; and risk of serious adverse events, defined by adverse events leading to hospitalisation or death. Cox proportional hazards models will be fitted to calculate HRs as the effect estimate for the outcomes. ETHICS AND DISSEMINATION The participating registries agree with the Declaration of Helsinki and received approval from local ethics committees. The results of the study will be published in scientific journals and presented at international dermatology conferences by the end of 2023.
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Grants
- Biogen, Boehringer Ingelheim, Bristol Myers Squibb, Celgene
- Amgen, Arena, Astellas
- UCB
- Pfizer
- Novartis
- Leo
- Janssen, Lilly
- Celgene
- GSK, Janssen, Lilly, Leo, Novartis, Pfizer, Sanofi, Sun Pharma, UCB
- The BAD
- British Association of Dermatologists (BAD)
- University of Manchester
- The British Association of Dermatologists
- Amgen
- NIHR Manchester Biomedical Research Centre
- Psoriasis Association
- BAD
- UCB Pharma
- Sandoz
- Amgen, Celgene, Janssen, LEO Pharma, Lilly, Novartis, Samsung
- AbbVie
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Affiliation(s)
- Duc Binh Phan
- Centre for Dermatology Research, Northern Care Alliance NHS Foundation Trust, The University of Manchester, Manchester Academic Health Science Centre, National Institute for Health and Care Research (NIHR) Manchester Biomedical Research Centre, Manchester, UK
| | - Hugo Jourdain
- EPI-PHARE, French National Agency for Medicines and Health Products Safety (ANSM) and French National Health Insurance (CNAM), Saint-Denis, France
| | - Alicia González-Quesada
- Department of Dermatology, Hospital Universitario de Gran Canaria Dr Negrín, Las Palmas de Gran Canaria, Spain
| | - Mahmoud Zureik
- EPI-PHARE, French National Agency for Medicines and Health Products Safety (ANSM) and French National Health Insurance (CNAM), Saint-Denis, France
| | - Raquel Rivera-Díaz
- Department of Dermatology, Hospital Universitario 12 de Octubre, Madrid, Spain
| | | | | | - Mark Lunt
- Versus Arthritis Epidemiology Unit, The University of Manchester, Manchester, UK
| | - Ignacio Garcia-Doval
- , Research Unit, Fundacion Piel Sana AEDV, Madrid, Spain
- Department of Dermatology, Complexo Hospitalario Universitario de Vigo, Vigo, Spain
| | - Emilie Sbidian
- EPI-PHARE, French National Agency for Medicines and Health Products Safety (ANSM) and French National Health Insurance (CNAM), Saint-Denis, France
- EpiDermE Epidemiology in Dermatology and Evaluation of Therapeutics, Assistance Publique-Hôpitaux de Paris (AP-HP), Paris Est Créteil University, Créteil, France
| | - R B Warren
- Centre for Dermatology Research, Northern Care Alliance NHS Foundation Trust, The University of Manchester, Manchester Academic Health Science Centre, National Institute for Health and Care Research (NIHR) Manchester Biomedical Research Centre, Manchester, UK
| | - Zenas Z N Yiu
- Centre for Dermatology Research, Northern Care Alliance NHS Foundation Trust, The University of Manchester, Manchester Academic Health Science Centre, National Institute for Health and Care Research (NIHR) Manchester Biomedical Research Centre, Manchester, UK
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46
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Phan DB, Bewley AP, Smith CH, Mackenzie T, Griffiths CEM, Lunt M, Warren RB, Yiu ZZN. Uptake of tumour necrosis factor-alpha inhibitor biosimilars for psoriasis: a drug utilization study from the British Association of Dermatologists Biologic and Immunomodulators Register (BADBIR). Br J Dermatol 2023; 189:62-70. [PMID: 37016153 DOI: 10.1093/bjd/ljad107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 03/22/2023] [Accepted: 03/29/2023] [Indexed: 04/06/2023]
Abstract
BACKGROUND Tumour necrosis factor-alpha inhibitors (TNFi) have revolutionized the treatment of moderate-to-severe psoriasis. Following patent expiry of the originator biologics, TNFi biosimilars became available, presenting the opportunity for significant reductions in drug costs. OBJECTIVES To describe the uptake of TNFi biosimilars for psoriasis treatment in the UK and Ireland. METHODS This observational cohort study utilizes data from the British Association of Dermatologists Biologic and Immunomodulators Register (BADBIR), a national pharmacovigilance study register for patients with psoriasis on systemic treatments. We analysed biosimilar uptake trends over time in nine geographical regions of England along with Wales, Scotland, Northern Ireland and the Republic of Ireland. We assessed the incidence of switching to biosimilars in an originator-user cohort (switchers). Patients on originators infliximab, etanercept and adalimumab at the time originator patents expired, entered the cohort on 1 February 2015, August 2015 and October 2018, respectively, and were followed up until 31 October 2021. Trends in biosimilar initiations were assessed in an adalimumab-naïve cohort who started adalimumab between 1 October 2018 and 31 July 2019 (starters). We assessed the associations between patient factors and originator-to-biosimilar switching and biosimilar initiation using a multivariable Cox regression model and a multivariable logistic regression model, respectively. RESULTS Included in the originator-user cohort were 4202 patients (209 on infliximab, 742 on etanercept and 3251 on adalimumab). For infliximab, etanercept and adalimumab, respectively, the cumulative incidence of originator-to-biosimilar switching increased with time to 14.8%, 23.6% and 66.6% after 3 years. Across geographical regions, 3-year switching rates varied from 0% to 43.7% for infliximab; from 0% to 40.4% for etanercept; and from 12.5% to 84.3% for adalimumab. Out of the 528 patients included in the adalimumab-naïve cohort, 67.8% started on biosimilars. Originator-to-biosimilar switching and biosimilar initiation were more common in men and in patients who had lower Psoriasis Area and Severity Index at cohort entry. CONCLUSIONS The uptake of biosimilars increased over time and varied considerably across the UK and Ireland; adalimumab had the highest biosimilar uptake rate compared with that of other TNFi drugs.
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Affiliation(s)
- Duc Binh Phan
- Manchester Centre for Dermatology Research, Northern Care Alliance NHS Foundation Trust, The University of Manchester, Manchester Academic Health Science Centre, National Institute for Health and Care Research (NIHR) Manchester Biomedical Research Centre, Manchester, UK
| | - Anthony P Bewley
- Department of Dermatology, Barts Health NHS Trust and Queen Mary College (University of London), London, UK
| | - Catherine H Smith
- King's College London and St John's Institute of Dermatology, Guy's & St Thomas' NHS Foundation Trust, London, UK
| | | | - Christopher E M Griffiths
- Manchester Centre for Dermatology Research, Northern Care Alliance NHS Foundation Trust, The University of Manchester, Manchester Academic Health Science Centre, National Institute for Health and Care Research (NIHR) Manchester Biomedical Research Centre, Manchester, UK
| | - Mark Lunt
- Centre for Epidemiology Versus Arthritis, The University of Manchester, Manchester, UK
| | - Richard B Warren
- Manchester Centre for Dermatology Research, Northern Care Alliance NHS Foundation Trust, The University of Manchester, Manchester Academic Health Science Centre, National Institute for Health and Care Research (NIHR) Manchester Biomedical Research Centre, Manchester, UK
| | - Zenas Z N Yiu
- Manchester Centre for Dermatology Research, Northern Care Alliance NHS Foundation Trust, The University of Manchester, Manchester Academic Health Science Centre, National Institute for Health and Care Research (NIHR) Manchester Biomedical Research Centre, Manchester, UK
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47
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Deacy AM, Gan SKE. The influence of variable-heavy chain families on IgG 2, 3, 4, FcγRs and B-cell superantigens protein G and L binding using biolayer interferometry. Antib Ther 2023; 6:182-193. [PMID: 37680351 PMCID: PMC10481891 DOI: 10.1093/abt/tbad016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2023] [Revised: 06/16/2023] [Accepted: 06/28/2023] [Indexed: 09/09/2023] Open
Abstract
As the most abundant immunoglobulin in blood and the most common human isotype used for therapeutic monoclonal antibodies, the engagement and activation of its Fc receptors by IgGs are crucial for antibody function. Assumed to be relatively constant within subtypes, recent studies reveal that antibody variable regions exert distal effects of modulating antibody-receptor interactions on antibody isotypes. These variable (V)-region distal effects are also expected for the IgG subtypes. With an in-depth understanding of the V-region effects, researchers can make a more informed antibody engineering approach and antibody purification strategy accounting for the functions of microbial immune evasion . In this study, we created a panel of IgG2/IgG3/IgG4 antibodies by changing the VH family (VH1-7) frameworks while retaining the complementary determining regions of pertumuzab and measured their interactions with FcγRIa, FcγRIIaH167, FcγRIIaR167, FcγRIIb/c, FcγRIIIaF176, FcγRIIIaV176, FcγRIIIbNA1 and FcγRIIIbNA2 receptors alongside B-cell superantigens Protein L and G using biolayer interferometry. The panel of 21 IgGs demonstrated that the VH frameworks influenced receptor binding sites on the constant region in a non-canonical manner. However, there was minimal influence on the binding of bacterial B-cell superantigens Proteins L and Protein G on the IgGs, showing their robustness against V-region effects. These results demonstrate the role of V-regions during the humanization of therapeutic antibodies that can influence FcR-dependent immune responses while retaining binding by bacterial B-cell superantigens for antibody purification. These in vitro measurements provide a clue to detailed antibody engineering and understanding of antibody superantigen functions that would be relevant with in vivo validation.
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Affiliation(s)
- Anthony M Deacy
- Antibody& Product Development Lab, Agency for Science, Technology and Research (ASTAR), Singapore, and Wenzhou-Kean University, Wenzhou, Zhejiang, China
- School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK
| | - Samuel Ken-En Gan
- Antibody& Product Development Lab, Agency for Science, Technology and Research (ASTAR), Singapore, and Wenzhou-Kean University, Wenzhou, Zhejiang, China
- School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK
- Zhejiang Bioinformatics International Science and Technology Cooperation Centre, Wenzhou-Kean University, Wenzhou, Zhejiang Province, China
- Wenzhou Municipal Key Lab of Applied Biomedical and Biopharmaceutical Informatics, Wenzhou-Kean University, Wenzhou, Zhejiang Province, China
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48
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Jennings MD, Srivastava P, Kershaw CJ, Talavera D, Grant C, Pavitt G. Interaction of the La-related protein Slf1 with colliding ribosomes maintains translation of oxidative-stress responsive mRNAs. Nucleic Acids Res 2023; 51:5755-5773. [PMID: 37070186 PMCID: PMC10287931 DOI: 10.1093/nar/gkad272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 03/31/2023] [Accepted: 04/04/2023] [Indexed: 04/19/2023] Open
Abstract
In response to oxidative stress cells reprogram gene expression to enhance levels of antioxidant enzymes and promote survival. In Saccharomyces cerevisiae the polysome-interacting La-related proteins (LARPs) Slf1 and Sro9 aid adaptation of protein synthesis during stress by undetermined means. To gain insight in their mechanisms of action in stress responses, we determined LARP mRNA binding positions in stressed and unstressed cells. Both proteins bind within coding regions of stress-regulated antioxidant enzyme and other highly translated mRNAs in both optimal and stressed conditions. LARP interaction sites are framed and enriched with ribosome footprints suggesting ribosome-LARP-mRNA complexes are identified. Although stress-induced translation of antioxidant enzyme mRNAs is attenuated in slf1Δ, these mRNAs remain on polysomes. Focusing further on Slf1, we find it binds to both monosomes and disomes following RNase treatment. slf1Δ reduces disome enrichment during stress and alters programmed ribosome frameshifting rates. We propose that Slf1 is a ribosome-associated translational modulator that stabilises stalled/collided ribosomes, prevents ribosome frameshifting and so promotes translation of a set of highly-translated mRNAs that together facilitate cell survival and adaptation to stress.
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Affiliation(s)
- Martin D Jennings
- Division of Molecular and Cellular Function, School of Biological Sciences, The University of Manchester, Manchester, M13 9PT, UK
| | - Priya Srivastava
- Division of Molecular and Cellular Function, School of Biological Sciences, The University of Manchester, Manchester, M13 9PT, UK
| | - Christopher J Kershaw
- Division of Molecular and Cellular Function, School of Biological Sciences, The University of Manchester, Manchester, M13 9PT, UK
| | - David Talavera
- Division of Cardiovascular Sciences, School of Medical Sciences, The University of Manchester, Manchester, M13 9PT, UK
| | - Christopher M Grant
- Division of Molecular and Cellular Function, School of Biological Sciences, The University of Manchester, Manchester, M13 9PT, UK
| | - Graham D Pavitt
- Division of Molecular and Cellular Function, School of Biological Sciences, The University of Manchester, Manchester, M13 9PT, UK
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49
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Garner KE, Salter A, Lau CK, Gurusaran M, Villemant CM, Granger EP, McNee G, Woodman PG, Davies OR, Burke BE, Allan VJ. The meiotic LINC complex component KASH5 is an activating adaptor for cytoplasmic dynein. J Cell Biol 2023; 222:e202204042. [PMID: 36946995 PMCID: PMC10071310 DOI: 10.1083/jcb.202204042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 12/15/2022] [Accepted: 02/10/2023] [Indexed: 03/23/2023] Open
Abstract
Cytoplasmic dynein-driven movement of chromosomes during prophase I of mammalian meiosis is essential for synapsis and genetic exchange. Dynein connects to chromosome telomeres via KASH5 and SUN1 or SUN2, which together span the nuclear envelope. Here, we show that KASH5 promotes dynein motility in vitro, and cytosolic KASH5 inhibits dynein's interphase functions. KASH5 interacts with a dynein light intermediate chain (DYNC1LI1 or DYNC1LI2) via a conserved helix in the LIC C-terminal, and this region is also needed for dynein's recruitment to other cellular membranes. KASH5's N-terminal EF-hands are essential as the interaction with dynein is disrupted by mutation of key calcium-binding residues, although it is not regulated by cellular calcium levels. Dynein can be recruited to KASH5 at the nuclear envelope independently of dynactin, while LIS1 is essential for dynactin incorporation into the KASH5-dynein complex. Altogether, we show that the transmembrane protein KASH5 is an activating adaptor for dynein and shed light on the hierarchy of assembly of KASH5-dynein-dynactin complexes.
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Affiliation(s)
- Kirsten E.L. Garner
- School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK
| | - Anna Salter
- School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK
- A*STAR Institute of Medical Biology, Singapore, Singapore
| | - Clinton K. Lau
- MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge Biomedical Campus, Cambridge, UK
| | - Manickam Gurusaran
- Wellcome Centre for Cell Biology, Institute of Cell Biology, University of Edinburgh, Edinburgh, UK
| | - Cécile M. Villemant
- School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK
| | - Elizabeth P. Granger
- School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK
| | - Gavin McNee
- School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK
| | - Philip G. Woodman
- School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK
| | - Owen R. Davies
- Wellcome Centre for Cell Biology, Institute of Cell Biology, University of Edinburgh, Edinburgh, UK
| | - Brian E. Burke
- A*STAR Institute of Medical Biology, Singapore, Singapore
| | - Victoria J. Allan
- School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK
- A*STAR Institute of Medical Biology, Singapore, Singapore
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50
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Liu Y, McNaughter PD, Azough F, Liu X, Skelton JM, Kretinin AV, Lewis DJ, Freer R. Enhanced Thermoelectric Performance of Tin(II) Sulfide Thin Films Prepared by Aerosol Assisted Chemical Vapor Deposition. ACS Appl Energy Mater 2023; 6:4462-4474. [PMID: 37123105 PMCID: PMC10131136 DOI: 10.1021/acsaem.3c00608] [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] [Figures] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Accepted: 03/17/2023] [Indexed: 05/03/2023]
Abstract
Orthorhombic SnS exhibits excellent thermoelectric performance as a consequence its relatively high Seebeck coefficient and low thermal conductivity. In the present work, polycrystalline orthorhombic SnS thin films were prepared by aerosol-assisted chemical vapor deposition (AACVD) using the single source precursor dibutyl-bis(diethyldithiocarbamato)tin(IV) [Sn(C4H9)2(S2CN(C2H5)2)2]. We examined the effects of the processing parameters on the composition, microstructure, and electrical transport properties of the SnS films. Deposition temperature dominates charge transport; the room temperature electrical conductivity increased from 0.003 to 0.19 S·cm-1 as deposition temperature increased from 375 to 445 °C. Similarly, the maximum power factor (PF) increased with deposition temperature, reaching ∼0.22 μW·cm-1·K-2 at 570 K. The power factors for SnS films deposited by AACVD are higher than values from earlier work on SnS bulks and SnS/SnSe films at temperatures up to 520 K. The electronic structure and electrical transport properties of SnS were investigated using density-functional theory to provide an improved understanding of the materials performance. To the best of our knowledge, the thermal conductivity (κ) of SnS film was measured for the first time allowing the figure of merit (zT) for SnS film to be evaluated. A relatively low thermal conductivity of ∼0.41 W·m-1·K-1 was obtained at 550 K for SnS films deposited at 445 °C; the corresponding zT value was ∼0.026. The SnS films are good candidates for thermoelectric applications and AACVD is a promising technique for the preparation of high-performance thermoelectric films.
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Affiliation(s)
- Yu Liu
- Department
of Materials, University of Manchester, Oxford Road, Manchester, M13 9PL, U.K.
| | - Paul D. McNaughter
- Department
of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, U.K.
| | - Feridoon Azough
- Department
of Materials, University of Manchester, Oxford Road, Manchester, M13 9PL, U.K.
| | - Xiaodong Liu
- Department
of Materials, University of Manchester, Oxford Road, Manchester, M13 9PL, U.K.
| | - Jonathan M. Skelton
- Department
of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, U.K.
| | - Andrey V. Kretinin
- Department
of Materials, University of Manchester, Oxford Road, Manchester, M13 9PL, U.K.
- National
Graphene Institute, University of Manchester, Oxford Road, Manchester, M13 9PL, U.K.
| | - David J. Lewis
- Department
of Materials, University of Manchester, Oxford Road, Manchester, M13 9PL, U.K.
| | - Robert Freer
- Department
of Materials, University of Manchester, Oxford Road, Manchester, M13 9PL, U.K.
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