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Burton A, Elfanagely Y, Min M. Direct Visualization of Diverticular Bleed on Colonoscopy. R I Med J (2013) 2024; 107:26-27. [PMID: 38285748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/31/2024]
Affiliation(s)
- Adam Burton
- Department of Internal Medicine, Warren Alpert Medical School of Brown University, Providence, Rhode Island
| | - Yousef Elfanagely
- Division of Gastroenterology, Warren Alpert Medical School of Brown University, Providence, Rhode Island
| | - May Min
- Division of Gastroenterology, Warren Alpert Medical School of Brown University, Providence, Rhode Island
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Hayes D, Fancourt D, Burton A. The experiences and impact of the COVID-19 pandemic on young carers: practice implications and planning for future health emergencies. Child Adolesc Psychiatry Ment Health 2024; 18:2. [PMID: 38172971 PMCID: PMC10765662 DOI: 10.1186/s13034-023-00697-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Accepted: 12/19/2023] [Indexed: 01/05/2024] Open
Abstract
BACKGROUND Young carers are children or young people aged up to 25 years old who undertake unpaid caring responsibilities for a friend or family member. Young carers faced significant challenges brought on by the COVID-19 pandemic. We explored the impact of the pandemic and associated restrictions on mental health, wellbeing and access to support in young carers in the United Kingdom (UK) to understand how to improve services, as well as support this population in future health emergencies. METHOD We conducted 22 qualitative semi-structured interviews from May to November 2021 with 14 young carers and eight staff working in organisations that supported them. Interviews took place remotely over video or telephone call and explored participant experiences of the pandemic and its impact on their health, wellbeing and caring responsibilities. We used reflexive thematic analysis to analyse interview transcripts. RESULTS We identified four overarching themes pertaining to the impact of the pandemic and associated restrictions on mental health, wellbeing and access to support in young carers in the UK: (1) challenges in protecting loved ones from the virus, (2) changes to and loss of routine, (3) reduced access to pre-pandemic informal and formal support structures and (4) better understanding of inner resilience and goals. Many participants struggled with their mental health and wellbeing as a result of pandemic related restrictions which impacted on support structures for themselves and the individual they cared for. However, positive impacts pertained to additional support provided by local authority and third sector organisations. CONCLUSIONS Our findings highlight some of the changes that affected young carers during the COVID-19 pandemic. The impact of changes to routine and a reduction in pre-pandemic support were the greatest concerns reported by participants in this study. The additional support provided by local authority and third sector organisations during social restrictions suggests such organisations could play a greater role in supporting this population going forward and that schools and Governments may wish to put in additional strategies and provisions to protect young carers in the future.
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Affiliation(s)
- D Hayes
- The Social Biobehavioural Research Group, Research Department of Behavioural Science and Health, Institute of Epidemiology & Health Care, University College London (UCL), 1-19 Torrington Place, London, WC1E 7HB, UK.
| | - D Fancourt
- The Social Biobehavioural Research Group, Research Department of Behavioural Science and Health, Institute of Epidemiology & Health Care, University College London (UCL), 1-19 Torrington Place, London, WC1E 7HB, UK
| | - A Burton
- The Social Biobehavioural Research Group, Research Department of Behavioural Science and Health, Institute of Epidemiology & Health Care, University College London (UCL), 1-19 Torrington Place, London, WC1E 7HB, UK
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Bell O, Burton A, Dean C, Gasser SM, Torres-Padilla ME. Heterochromatin definition and function. Nat Rev Mol Cell Biol 2023; 24:691-694. [PMID: 37069331 DOI: 10.1038/s41580-023-00599-7] [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] [Accepted: 03/13/2023] [Indexed: 04/19/2023]
Affiliation(s)
- Oliver Bell
- Departments of Biochemistry and Molecular Medicine, and Stem Cell and Regenerative Medicine, Keck School of Medicine of the University of Southern California, Los Angeles, CA, USA.
| | - Adam Burton
- Institute of Epigenetics and Stem Cells (IES), Helmholtz Zentrum München, München, Germany.
| | | | - Susan M Gasser
- L'Institut Suisse de Recherche Expérimentale sur le Cancer (ISREC) Foundation, Lausanne, Switzerland.
| | - Maria-Elena Torres-Padilla
- Institute of Epigenetics and Stem Cells (IES), Helmholtz Zentrum München, München, Germany.
- Faculty of Biology, Ludwig-Maximilians Universität, München, Germany.
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Guthmann M, Qian C, Gialdini I, Nakatani T, Ettinger A, Schauer T, Kukhtevich I, Schneider R, Lamb DC, Burton A, Torres-Padilla ME. A change in biophysical properties accompanies heterochromatin formation in mouse embryos. Genes Dev 2023; 37:336-350. [PMID: 37072228 PMCID: PMC10153458 DOI: 10.1101/gad.350353.122] [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: 12/13/2022] [Accepted: 03/31/2023] [Indexed: 04/20/2023]
Abstract
The majority of our genome is composed of repeated DNA sequences that assemble into heterochromatin, a highly compacted structure that constrains their mutational potential. How heterochromatin forms during development and how its structure is maintained are not fully understood. Here, we show that mouse heterochromatin phase-separates after fertilization, during the earliest stages of mammalian embryogenesis. Using high-resolution quantitative imaging and molecular biology approaches, we show that pericentromeric heterochromatin displays properties consistent with a liquid-like state at the two-cell stage, which change at the four-cell stage, when chromocenters mature and heterochromatin becomes silent. Disrupting the condensates results in altered transcript levels of pericentromeric heterochromatin, suggesting a functional role for phase separation in heterochromatin function. Thus, our work shows that mouse heterochromatin forms membrane-less compartments with biophysical properties that change during development and provides new insights into the self-organization of chromatin domains during mammalian embryogenesis.
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Affiliation(s)
- Manuel Guthmann
- Institute of Epigenetics and Stem Cells (IES), Helmholtz Zentrum München, D-81377 München, Germany
| | - Chen Qian
- Department of Chemistry, Center for NanoScience (CeNS), Ludwig Maximilians-Universität München, 81377 München, Germany
| | - Irene Gialdini
- Department of Chemistry, Center for NanoScience (CeNS), Ludwig Maximilians-Universität München, 81377 München, Germany
| | - Tsunetoshi Nakatani
- Institute of Epigenetics and Stem Cells (IES), Helmholtz Zentrum München, D-81377 München, Germany
| | - Andreas Ettinger
- Institute of Epigenetics and Stem Cells (IES), Helmholtz Zentrum München, D-81377 München, Germany
| | - Tamas Schauer
- Institute of Epigenetics and Stem Cells (IES), Helmholtz Zentrum München, D-81377 München, Germany
| | - Igor Kukhtevich
- Institute of Functional Epigenetics (IFE), Helmholtz Zentrum München, D-85764 Neuherberg, Germany
| | - Robert Schneider
- Institute of Functional Epigenetics (IFE), Helmholtz Zentrum München, D-85764 Neuherberg, Germany
| | - Don C Lamb
- Department of Chemistry, Center for NanoScience (CeNS), Ludwig Maximilians-Universität München, 81377 München, Germany
| | - Adam Burton
- Institute of Epigenetics and Stem Cells (IES), Helmholtz Zentrum München, D-81377 München, Germany
| | - Maria-Elena Torres-Padilla
- Institute of Epigenetics and Stem Cells (IES), Helmholtz Zentrum München, D-81377 München, Germany;
- Faculty of Biology, Ludwig-Maximilians Universität, München, 82152 Planegg, Germany
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McKinlay AR, Simon YR, May T, Fancourt D, Burton A. How did UK social distancing restrictions affect the lives of women experiencing intimate partner violence during the COVID-19 pandemic? A qualitative exploration of survivor views. BMC Public Health 2023; 23:123. [PMID: 36653799 PMCID: PMC9845821 DOI: 10.1186/s12889-023-14987-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Accepted: 01/04/2023] [Indexed: 01/20/2023] Open
Abstract
BACKGROUND Increased numbers of domestic abuse cases were reported at the start of the COVID-19 pandemic. Many people experiencing abuse faced barriers to seeking support with service closures affecting the sector. Available evidence suggests women are overrepresented in the reported cases of intimate partner violence (IPV) and we aimed to learn more about how their lives were impacted by social distancing restrictions. METHODS We conducted an online qualitative interview study, using reflexive thematic analysis. Interviews were conducted between April 2021 and March 2022. 18 women in the UK with past experiences of IPV provided informed consent and participated in this study. RESULTS During the analysis, we identified five themes relating to the impact of lockdown restrictions on participants' lives, including: (1) Lockdown meant being confined to a place where abuse was escalating, (2) Barriers to accessing support, including "cancelled" services and missed opportunities to intervene during interactions in lockdown with frontline workers. (3) Increased feelings of fear, isolation, and loss of control, particularly during the early stages of the pandemic from the combination of abuse and pandemic-related changes to daily life. (4) Some forms of support were more accessible during the pandemic, such as provision of online psychological support and social groups. Participants also accessed new forms of support for the first time during the pandemic, in some cases sparked by posts and content on social media about abuse awareness. (5) For some, psychosocial wellbeing transformed during the pandemic, with several participants using the word "freedom" when reflecting on their experience of simultaneously escaping abuse and living through the COVID-19 pandemic. CONCLUSIONS In this study, we explored the views of female survivors of IPV in the UK during the COVID-19 pandemic. Our results highlight the importance of combined public awareness campaigns and community intervention points for victims to safely seek help during social distancing restrictions. Having the time and space to reflect on healing after escaping abuse was described by women in our study as a benefit from their lives in lockdown, which is a factor that could be incorporated into future initiatives developed to support people subjected to violence and abuse.
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Affiliation(s)
- A. R. McKinlay
- grid.83440.3b0000000121901201Research Department of Behavioural Science and Health, Institute of Epidemiology & Health Care, University College London, 1-19 Torrington Place, London, WC1E 7HB UK
| | - Y. R. Simon
- grid.83440.3b0000000121901201Research Department of Behavioural Science and Health, Institute of Epidemiology & Health Care, University College London, 1-19 Torrington Place, London, WC1E 7HB UK
| | - T. May
- grid.83440.3b0000000121901201Research Department of Behavioural Science and Health, Institute of Epidemiology & Health Care, University College London, 1-19 Torrington Place, London, WC1E 7HB UK
| | - D. Fancourt
- grid.83440.3b0000000121901201Research Department of Behavioural Science and Health, Institute of Epidemiology & Health Care, University College London, 1-19 Torrington Place, London, WC1E 7HB UK
| | - A. Burton
- grid.83440.3b0000000121901201Research Department of Behavioural Science and Health, Institute of Epidemiology & Health Care, University College London, 1-19 Torrington Place, London, WC1E 7HB UK
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Millán-Zambrano G, Burton A, Bannister AJ, Schneider R. Histone post-translational modifications - cause and consequence of genome function. Nat Rev Genet 2022; 23:563-580. [PMID: 35338361 DOI: 10.1038/s41576-022-00468-7] [Citation(s) in RCA: 214] [Impact Index Per Article: 107.0] [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] [Accepted: 02/28/2022] [Indexed: 12/16/2022]
Abstract
Much has been learned since the early 1960s about histone post-translational modifications (PTMs) and how they affect DNA-templated processes at the molecular level. This understanding has been bolstered in the past decade by the identification of new types of histone PTM, the advent of new genome-wide mapping approaches and methods to deposit or remove PTMs in a locally and temporally controlled manner. Now, with the availability of vast amounts of data across various biological systems, the functional role of PTMs in important processes (such as transcription, recombination, replication, DNA repair and the modulation of genomic architecture) is slowly emerging. This Review explores the contribution of histone PTMs to the regulation of genome function by discussing when these modifications play a causative (or instructive) role in DNA-templated processes and when they are deposited as a consequence of such processes, to reinforce and record the event. Important advances in the field showing that histone PTMs can exert both direct and indirect effects on genome function are also presented.
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Affiliation(s)
- Gonzalo Millán-Zambrano
- Centro Andaluz de Biología Molecular y Medicina Regenerativa CABIMER, Universidad de Sevilla-CSIC-Universidad Pablo de Olavide, Seville, Spain
- Departamento de Genética, Facultad de Biología, Universidad de Sevilla, Seville, Spain
| | - Adam Burton
- Institute of Epigenetics and Stem Cells, Helmholtz Center Munich, Munich, Germany
| | - Andrew J Bannister
- Gurdon Institute and Department of Pathology, University of Cambridge, Cambridge, UK.
| | - Robert Schneider
- Institute of Functional Epigenetics, Helmholtz Center Munich, Munich, Germany.
- Faculty of Biology, Ludwig Maximilian University (LMU) of Munich, Munich, Germany.
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Poppe M, Duffy L, Marchant NL, Barber JA, Hunter R, Bass N, Minihane AM, Walters K, Higgs P, Rapaport P, Lang IA, Morgan-Trimmer S, Huntley J, Walker Z, Brodaty H, Kales HC, Ritchie K, Burton A, Wenborn J, Betz A, Cooper C. The APPLE Tree programme: Active Prevention in People at risk of dementia through Lifestyle, bEhaviour change and Technology to build REsiliEnce-randomised controlled trial. Trials 2022; 23:596. [PMID: 35883143 PMCID: PMC9315085 DOI: 10.1186/s13063-022-06557-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2022] [Accepted: 07/16/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Large-scale trials of multidomain interventions show that modifying lifestyle and psychological risk factors can slow cognitive decline. We aim to determine if a lower intensity, personally tailored secondary dementia prevention programme for older people with subjective or mild objective memory decline, informed by behaviour change theory, reduces cognitive decline over 2 years. METHODS A multi-site, single-blind randomised controlled trial recruiting 704 older adults at high dementia risk due to mild cognitive impairment (MCI) or subjective cognitive decline (SCD). Participants are randomised using 1:1 allocation ratio to the APPLE Tree intervention versus control arm (dementia prevention information), stratified by site. The intervention explores and implements strategies to promote healthy lifestyle, increase pleasurable activities and social connections and improve long-term condition self-management. Two facilitators trained and supervised by a clinical psychologist deliver ten, 1-h group video call sessions over 6 months (approximately every fortnight), video-call 'tea breaks' (less structured, facilitated social sessions) in intervening weeks and individual goal-setting phone calls every 2 weeks. From 6 to 12 months, participants meet monthly for 'tea breaks', with those not attending receiving monthly goal-setting phone calls. Participants receive a food delivery, pedometer and website access to cognitive training and information about lifestyle modification. Follow-ups for all outcome measures are at 12 and 24 months. The primary outcome is cognition (Neuropsychological Test Battery (NTB) score) at 24 months. Secondary outcomes are quality of life, cost per quality-adjusted life year (QALY) and wellbeing and lifestyle factors the intervention targets (diet, vascular risk, body weight, activity, sleep, anxiety, depression, social networks and loneliness, alcohol intake and smoking). Participants from purposively selected sites participate in qualitative process evaluation interviews, which will be analysed using thematic analytic methods. DISCUSSION If effective, the intervention design, involving remote delivery and non-clinical facilitators, would facilitate intervention roll-out to older people with memory concerns. TRIAL REGISTRATION ISRCTN17325135 . Registration date 27 November 2019.
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Affiliation(s)
- M Poppe
- UCL Division of Psychiatry, University College London, London, UK
| | - L Duffy
- UCL Division of Psychiatry, University College London, London, UK
| | - N L Marchant
- UCL Division of Psychiatry, University College London, London, UK
| | - J A Barber
- Department of Statistical Science, University College London, London, UK
| | - R Hunter
- Research Department of Primary Care and Population Health, University College London, London, UK
| | - N Bass
- UCL Division of Psychiatry, University College London, London, UK
| | - A M Minihane
- Norwich Medical School, University of East Anglia, Norwich, UK
| | - K Walters
- Research Department of Primary Care and Population Health, University College London, London, UK
| | - P Higgs
- UCL Division of Psychiatry, University College London, London, UK
| | - P Rapaport
- UCL Division of Psychiatry, University College London, London, UK
| | - I A Lang
- College of Medicine and Health, University of Exeter, Exeter, UK
| | - S Morgan-Trimmer
- College of Medicine and Health, University of Exeter, Exeter, UK
| | - J Huntley
- UCL Division of Psychiatry, University College London, London, UK
| | - Z Walker
- UCL Division of Psychiatry, University College London, London, UK
| | - H Brodaty
- Centre for Healthy Brain Ageing, University of New South Wales, Sydney, Australia
| | - H C Kales
- Department of Psychiatry and Behavioral Sciences, University of California, Davis, Sacramento, USA
| | - K Ritchie
- Institut de Neurosciences de Montpellier (INM), Montpellier, France
| | - A Burton
- Department of Behavioural Science and Health, University College London, London, UK
| | - J Wenborn
- UCL Division of Psychiatry, University College London, London, UK
| | - A Betz
- Queen Mary University London, Centre for Psychiatry and Mental Health, Wolfson Institute for Population Health, London, UK
| | - C Cooper
- Queen Mary University London, Centre for Psychiatry and Mental Health, Wolfson Institute for Population Health, London, UK.
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McKinlay AR, Fancourt D, Burton A. Factors affecting the mental health of pregnant women using UK maternity services during the COVID-19 pandemic: a qualitative interview study. BMC Pregnancy Childbirth 2022; 22:313. [PMID: 35413807 PMCID: PMC9005019 DOI: 10.1186/s12884-022-04602-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Accepted: 03/22/2022] [Indexed: 01/16/2023] Open
Abstract
Background People using maternity services in the United Kingdom (UK) have faced significant changes brought on by the COVID-19 pandemic and social distancing regulations. We focused on the experiences of pregnant women using UK maternity services during the pandemic and the impact of social distancing rules on their mental health and wellbeing. Methods We conducted 23 qualitative semi-structured interviews from June 2020 to August 2021, with women from across the UK who experienced a pregnancy during the pandemic. Nineteen participants in the study carried their pregnancy to term and four had experienced a miscarriage during the pandemic. Interviews took place remotely over video or telephone call, discussing topics such as mental health during pregnancy and use of UK maternity services. We used reflexive thematic analysis to analyse interview transcripts. Results We generated six higher order themes: [1] Some pregnancy discomforts alleviated by social distancing measures, [2] The importance of relationships that support coping and adjustment, [3] Missed pregnancy and parenthood experiences, [4] The mental health consequences of birth partner and visitor restrictions, [5] Maternity services under pressure, and [6] Lack of connection with staff. Many participants felt a sense of loss over a pregnancy experience that differed so remarkably to what they had expected because of the pandemic. Supportive relationships were important to help cope with pregnancy and pandemic-related changes; but feelings of isolation were compounded for some participants because opportunities to build social connections through face-to-face parent groups were unavailable. Participants also described feeling alone due to restrictions on their partners being present when accessing UK maternity services. Conclusions Our findings highlight some of the changes that may have affected pregnant women’s mental health during the COVID-19 pandemic. Reduced social support and being unable to have a partner or support person present during maternity service use were the greatest concerns reported by participants in this study. Absence of birth partners removed a protective buffer in times of uncertainty and distress. This suggests that the availability of a birth partner or support person must be prioritised wherever possible in times of pandemics to protect the mental health of people experiencing pregnancy and miscarriage. Supplementary Information The online version contains supplementary material available at 10.1186/s12884-022-04602-5.
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Affiliation(s)
- A R McKinlay
- Research Department of Behavioural Science and Health, Institute of Epidemiology & Health Care, University College London, 1-19 Torrington Place, London, WC1E 7HB, UK.
| | - D Fancourt
- Research Department of Behavioural Science and Health, Institute of Epidemiology & Health Care, University College London, 1-19 Torrington Place, London, WC1E 7HB, UK
| | - A Burton
- Research Department of Behavioural Science and Health, Institute of Epidemiology & Health Care, University College London, 1-19 Torrington Place, London, WC1E 7HB, UK
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Klass S, Burton A, Price C. SCUBA Diver's Knee: A Case Report. Curr Sports Med Rep 2022; 21:109-111. [PMID: 35394950 DOI: 10.1249/jsr.0000000000000945] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
ABSTRACT With more than 9 million recreational certified self-contained underwater breathing apparatus divers in the United States, clinicians should be aware of the unique diving-related injuries. One of the most common diving-related injuries is type 1 decompression sickness, or "the bends." The bends commonly manifest as localized joint pain, most often occurring within 24 h of surfacing and resolving over the following 1 to 2 d. We report a unique case of a patient who experienced an exacerbation of musculoskeletal joint pain following initial recovery. This 35-year-old man had nearly complete resolution of his joint pain following the bends, then developed severe right knee pain with swelling after a high-volume lower body workout. Following unremarkable imaging and unsuccessful conservative treatment, ultrasound-guided aspiration of his right knee was performed, which resolved the patient's symptoms. This case highlights a unique presentation of the bends and demonstrates a potentially beneficial treatment if recurrence of the bends is suspected.
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Affiliation(s)
- Scott Klass
- University of Miami Miller School of Medicine, University of Miami Hospitals and Clinics, Miami, FL
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Fisher A, Roberts A, McKinlay AR, Fancourt D, Burton A. The impact of the COVID-19 pandemic on mental health and well-being of people living with a long-term physical health condition: a qualitative study. BMC Public Health 2021; 21:1801. [PMID: 34620136 PMCID: PMC8496145 DOI: 10.1186/s12889-021-11751-3] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Accepted: 09/08/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The COVID-19 pandemic and associated restrictions caused major global disruption. Individuals with long-term physical health conditions (LTCs) are at higher risk of severe illness and often subject to the strictest pandemic guidance, so may be disproportionally affected. The aim of this study was to qualitatively explore how living with a LTC during the COVID-19 pandemic affected people's mental health and wellbeing. METHODS Participants were people living with LTCs who participated in telephone/video call interviews based on a semi-structured topic guide. Key themes and subthemes were determined using deductive and inductive thematic analysis. RESULTS The sample included 32 participants with LTCs (most commonly cancer, respiratory conditions or cardiovascular diseases), mean age 57 (SD 13) years, 66% female and 72% white British. There were four overarching themes specific to living with a LTC. These were 1) high levels of fear and anxiety related to perceived consequences of catching COVID-19, 2) impact of shielding/isolation on mental health and wellbeing, 3) experience of healthcare during the pandemic and 4) anxiety created by uncertainty about the future. Fourteen subthemes were identified, including concerns about accessing essential supplies and the importance of social support. Individuals who lived alone and were advised to shield could be profoundly negatively affected. CONCLUSIONS This study found that there were a number of aspects of living with a LTC during the pandemic that had a significant impact on mental health and well-being. There should be focus on how best to provide practical and social support to people with LTCs during a pandemic, particularly if they have to shield or isolate.
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Affiliation(s)
- A Fisher
- Department of Behavioural Science and Health, University College London, 1-19 Torrington Place, London, WC1E 7HB, UK.
| | - A Roberts
- Department of Behavioural Science and Health, University College London, 1-19 Torrington Place, London, WC1E 7HB, UK
| | - A R McKinlay
- Department of Behavioural Science and Health, University College London, 1-19 Torrington Place, London, WC1E 7HB, UK
| | - D Fancourt
- Department of Behavioural Science and Health, University College London, 1-19 Torrington Place, London, WC1E 7HB, UK
| | - A Burton
- Department of Behavioural Science and Health, University College London, 1-19 Torrington Place, London, WC1E 7HB, UK
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Affiliation(s)
- Adam Burton
- Institute of Epigenetics and Stem Cells (IES), Helmholtz Zentrum München, D-81377, München, Germany
| | - Maria-Elena Torres-Padilla
- Institute of Epigenetics and Stem Cells (IES), Helmholtz Zentrum München, D-81377, München, Germany. .,Faculty of Biology, Ludwig-Maximilians Universität, München, Germany.
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McKinlay AR, Fancourt D, Burton A. A qualitative study about the mental health and wellbeing of older adults in the UK during the COVID-19 pandemic. BMC Geriatr 2021; 21:439. [PMID: 34311710 PMCID: PMC8312210 DOI: 10.1186/s12877-021-02367-8] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Accepted: 06/29/2021] [Indexed: 02/08/2023] Open
Abstract
OBJECTIVES The objective of this study was to examine factors that threatened and protected the wellbeing of older adults living in the UK during social distancing restrictions due to the COVID-19 pandemic. METHODS Semi-structured telephone or video interviews with 20 adults aged over 70. Purposive sampling methods were used to increase diversity within the group. Transcripts were analysed using reflexive thematic analysis. RESULTS Participants described potential threats to their wellbeing during the pandemic, including fears for mortality, grieving normal life, and concerns for the future. Participants also described activities and behaviours that helped to protect their mental health, including adopting a slower pace of life, maintaining routine, socialising, and using past coping skills. Many participants drew on their resilience and life experience to self-manage fear and uncertainty associated with the pandemic, using their time during lockdown to reflect or organise end-of-life affairs. DISCUSSION This study provides UK-based evidence that while some older adults experienced challenges during the first wave of COVID-19, many were resilient throughout social distancing restrictions despite early reported concerns of mental health consequences among the older adult population. Our findings highlight the importance of maintaining access to essentials to promote feelings of normality and use of social support to help reduce uncertainty in times of pandemics.
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Affiliation(s)
- A R McKinlay
- Research Department of Behavioural Science and Health, Institute of Epidemiology & Health Care, University College London, 1-19 Torrington Place, London, WC1E 7HB, UK.
| | - D Fancourt
- Research Department of Behavioural Science and Health, Institute of Epidemiology & Health Care, University College London, 1-19 Torrington Place, London, WC1E 7HB, UK
| | - A Burton
- Research Department of Behavioural Science and Health, Institute of Epidemiology & Health Care, University College London, 1-19 Torrington Place, London, WC1E 7HB, UK
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13
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Patel A, Burton A, Pandya S, Venincasa M, Gedde SJ, Cavuoto KM, Sridhar D, Kloosterboer A, Sridhar J. Demographics of Surgical Specialty Residency Program Directors in the United States: A Cross-sectional Analysis. Ann Surg Open 2021; 2:e044. [PMID: 34212159 PMCID: PMC8240812 DOI: 10.1097/as9.0000000000000044] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [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: 12/14/2020] [Accepted: 01/08/2021] [Indexed: 11/26/2022] Open
Abstract
OBJECTIVE To evaluate program director (PD) demographics, training background, and academic productivity in 11 surgical specialties. SUMMARY BACKGROUND DATA There is currently no comprehensive study comparing educational background, research output, and gender differences between PDs of surgical residencies in the United States. METHODS The Accreditation Council for Graduate Medical Education (ACGME) and the Association of American Medical Colleges (AAMC) websites were used to identify residency PDs. Age, information related to service as PD, educational background, and research output were collected utilizing online searches including Doximity, PubMed, and Scopus.. The ACGME Data Resource Book was used to obtain data on the gender makeup of residents in each surgical specialty. Data collection occurred between December 14, 2019, and May 9, 2020. RESULTS 1571 residency PDs across 11 surgical specialties were included. Significant differences between specialties were found with respect to PD gender, current age, age at appointment, years between residency and assignment, term duration, number of PubMed publications, and Scopus h-index. The current age (mean ± SD) ranged from 46.8 ± 8.5 years among Interventional Radiology (IR) PDs to 53.4 ± 9.1 years among Neurological Surgery (NEUROSURG) PDs. The proportion of female PDs ranged from 5.9% in NEUROSURG to 63.5% in Obstetrics and Gynecology (OB-GYN). Completion of a post-residency fellowship was least common for OB-GYN PDs at 9.1%, and most common for IR PDs at 98.8%. The number (mean ± SD) of PubMed publications and Scopus h-index ranged from 13.1 ± 22.3 publications and h index 4.5 ± 5.7 among OB-GYN PDs to 112.5 ± 103.0 publications and h index 27.4 ± 16.7 among Thoracic Surgery PDs. Age and academic productivity as measured by PubMed publications and Scopus h-index were significantly lower among female PDs in multiple surgical specialties. CONCLUSIONS There were significant variations in the PDs of surgical specialties, particularly with respect to gender and academic productivity. Efforts should be made to support and encourage greater female representation in the role of surgical residency PD.
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Affiliation(s)
- Annika Patel
- Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, Miami, FL
| | - Adam Burton
- Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, Miami, FL
| | - Shivani Pandya
- Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, Miami, FL
| | - Michael Venincasa
- Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, Miami, FL
| | - Steven J. Gedde
- Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, Miami, FL
| | - Kara M. Cavuoto
- Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, Miami, FL
| | - Divya Sridhar
- Harlem Hospital/Columbia University Medical Center, New York, NY
| | - Amy Kloosterboer
- Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, Miami, FL
| | - Jayanth Sridhar
- Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, Miami, FL
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14
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Monteagudo-Sánchez A, Hernandez Mora JR, Simon C, Burton A, Tenorio J, Lapunzina P, Clark S, Esteller M, Kelsey G, López-Siguero JP, de Nanclares GP, Torres-Padilla ME, Monk D. The role of ZFP57 and additional KRAB-zinc finger proteins in the maintenance of human imprinted methylation and multi-locus imprinting disturbances. Nucleic Acids Res 2020; 48:11394-11407. [PMID: 33053156 PMCID: PMC7672439 DOI: 10.1093/nar/gkaa837] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Revised: 09/10/2020] [Accepted: 10/13/2020] [Indexed: 12/13/2022] Open
Abstract
Genomic imprinting is an epigenetic process regulated by germline-derived DNA methylation that is resistant to embryonic reprogramming, resulting in parental origin-specific monoallelic gene expression. A subset of individuals affected by imprinting disorders (IDs) displays multi-locus imprinting disturbances (MLID), which may result from aberrant establishment of imprinted differentially methylated regions (DMRs) in gametes or their maintenance in early embryogenesis. Here we investigated the extent of MLID in a family harbouring a ZFP57 truncating variant and characterize the interactions between human ZFP57 and the KAP1 co-repressor complex. By ectopically targeting ZFP57 to reprogrammed loci in mouse embryos using a dCas9 approach, we confirm that ZFP57 recruitment is sufficient to protect oocyte-derived methylation from reprogramming. Expression profiling in human pre-implantation embryos and oocytes reveals that unlike in mice, ZFP57 is only expressed following embryonic-genome activation, implying that other KRAB-zinc finger proteins (KZNFs) recruit KAP1 prior to blastocyst formation. Furthermore, we uncover ZNF202 and ZNF445 as additional KZNFs likely to recruit KAP1 to imprinted loci during reprogramming in the absence of ZFP57. Together, these data confirm the perplexing link between KZFPs and imprint maintenance and highlight the differences between mouse and humans in this respect.
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Affiliation(s)
- Ana Monteagudo-Sánchez
- Imprinting and Cancer group, Bellvitge Institute for Biomedical Research, Gran via, L'Hospitalet de Llobregat, Barcelona, Spain
| | - Jose Ramon Hernandez Mora
- Imprinting and Cancer group, Bellvitge Institute for Biomedical Research, Gran via, L'Hospitalet de Llobregat, Barcelona, Spain
| | - Carlos Simon
- Department of Obstetrics and Gynecology, Valencia University and INCLIVA, Valencia, Spain.,Department of Obstetrics and Gynecology, BIDMC, Harvard University, Boston, MA, USA
| | - Adam Burton
- Institute of Epigenetics and Stem Cells, Helmholtz Zentrum München, München, Germany
| | - Jair Tenorio
- Medical and Molecular Genetics Institute, University Hospital La Paz, Madrid, Spain.,CIBERER, Centro de Investigacion Biomedica en Red de Enfermedades Raras, ISCIII, Madrid, Spain
| | - Pablo Lapunzina
- Medical and Molecular Genetics Institute, University Hospital La Paz, Madrid, Spain.,CIBERER, Centro de Investigacion Biomedica en Red de Enfermedades Raras, ISCIII, Madrid, Spain.,ITHACA, European Reference Network on Rare Congenital Malformations and Rare Intellectual Disability
| | - Stephen Clark
- Epigenetics Programme, The Babraham Institute, Babraham, Cambridge, UK
| | - Manel Esteller
- Josep Carreras Leukeamia Research Institute, Can Ruti, Cami de les Escoles, Badalona, Barcelona, Spain.,Department of Physiological Sciences II, School of Medicine, University of Barcelona, Barcelona, Catalonia, Spain.,Institucio Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Catalonia, Spain.,Centro de Investigacion Biomedica en Red Cancer (CIBERONC), Madrid, Spain
| | - Gavin Kelsey
- Epigenetics Programme, The Babraham Institute, Babraham, Cambridge, UK.,Centre for Trophoblast Research, University of Cambridge, UK
| | | | - Guiomar Perez de Nanclares
- (Epi)Genetics Laboratory, BioAraba Research Health Institute, Araba University Hospital, Vitoria-Gasteiz, Alava, Spain
| | | | - David Monk
- Imprinting and Cancer group, Bellvitge Institute for Biomedical Research, Gran via, L'Hospitalet de Llobregat, Barcelona, Spain.,Biomedical Research Centre, University of East Anglia, Norwich Research Park, Norwich, UK
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15
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Guthmann M, Burton A, Torres‐Padilla M. Expression and phase separation potential of heterochromatin proteins during early mouse development. EMBO Rep 2019; 20:e47952. [PMID: 31701657 PMCID: PMC6893284 DOI: 10.15252/embr.201947952] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Revised: 10/03/2019] [Accepted: 10/16/2019] [Indexed: 12/29/2022] Open
Abstract
In most eukaryotes, constitutive heterochromatin is associated with H3K9me3 and HP1α. The latter has been shown to play a role in heterochromatin formation through liquid-liquid phase separation. However, many other proteins are known to regulate and/or interact with constitutive heterochromatic regions in several species. We postulate that some of these heterochromatic proteins may play a role in the regulation of heterochromatin formation by liquid-liquid phase separation. Indeed, an analysis of the constitutive heterochromatin proteome shows that proteins associated with constitutive heterochromatin are significantly more disordered than a random set or a full nucleome set of proteins. Interestingly, their expression begins low and increases during preimplantation development. These observations suggest that the preimplantation embryo is a useful model to address the potential role for phase separation in heterochromatin formation, anticipating exciting research in the years to come.
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Affiliation(s)
- Manuel Guthmann
- Institute of Epigenetics and Stem Cells (IES)Helmholtz Zentrum MünchenMünchenGermany
- Faculty of BiologyLudwig‐Maximilians UniversitätMünchenGermany
| | - Adam Burton
- Institute of Epigenetics and Stem Cells (IES)Helmholtz Zentrum MünchenMünchenGermany
- Faculty of BiologyLudwig‐Maximilians UniversitätMünchenGermany
| | - Maria‐Elena Torres‐Padilla
- Institute of Epigenetics and Stem Cells (IES)Helmholtz Zentrum MünchenMünchenGermany
- Faculty of BiologyLudwig‐Maximilians UniversitätMünchenGermany
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16
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Guerra M, Cabrera M, Abella DF, Saadoun A, Burton A. Se and I status in pregnant ewes from a pastoral system and the effect of supplementation with Se and I or only Se on wool quality of lambs. Heliyon 2019; 5:e02486. [PMID: 31687580 PMCID: PMC6819793 DOI: 10.1016/j.heliyon.2019.e02486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Revised: 04/01/2019] [Accepted: 09/12/2019] [Indexed: 11/10/2022] Open
Abstract
Australian Merino ewes and lambs producing fine fibre wool for export are raised in the north-west of Uruguay in pasture-based systems. We studied the status of selenium and iodine in pregnant Merino ewes (10 per treatment) grazing in natural pasture, in natural pasture and supplemented with Se (0.1 mg Se/kg dry matter intake) and I (1 mg I/kg dry matter intake), or in natural pasture and supplemented with Se alone (0.1 mg Se/kg dry matter intake), during the last 30 days of gestation. Further, we evaluated the performance and wool quality of their offspring. Content of Se and I in natural pasture, in the sera of pregnant ewes, and in the wool of their offspring and levels of thyroidal hormones—TSH, T4, and free T3 (FT3)—in the sera of pregnant ewes were determined. The performance of lambs and the commercial parameters of fine fibre wool produced were measured. Results showed normal Se levels in serum (0.12–0.15 mg/l) in the ewes grazing in natural pasture (0.07–0.09 mg/kg DM) during late pregnancy. The observed increase in Se content in the pasture at lambing (0.11–0.16 mg/kg DM) improved serum Se levels (0.216 mg/l); however, the serum levels were not affected by the supplementation. I content in pasture showed adequate levels (0.50–0.60 mg/kg DM), which were reflected in the blood serum values 30 days prior to lambing (0.197–0.208 mg/l). However, at lambing, the I content in blood serum decreased (0.150 mg/l). Further, the supplementation did not modify the serum I levels (0.163–0.175 mg/l). An increase in FT3 levels in ewes at lambing could be associated with the increase in Se content in pasture and/or the adequate I content in pasture. No effect of supplementation was observed. Lambs showed good results regarding the quality of fine fibre wool and performance after supplementation with Se and I or Se alone and exhibited slightly improved Se and I content in wool. In conclusion, natural pasture provides adequate status in Se and I for the Merino ewes and their offspring without any additional beneficial effects of supplementation with Se and I or only Se.
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17
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Harris AJL, Blower FBN, Rodgers SA, Lagator S, Page E, Burton A, Urlichich D, Speekenbrink M. Failures to replicate a key result of the selective accessibility theory of anchoring. J Exp Psychol Gen 2019; 148:e30-e50. [PMID: 31294586 DOI: 10.1037/xge0000644] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Numerical anchoring effects describe the assimilative effect of a previously presented number on subsequent numerical estimates. Such effects are robust and consequential. A number of different accounts have been proposed to explain these effects. What is currently unclear is under which situations different mechanisms play more or less critical roles. An extant test from the literature is proposed as a "signature test" for the operation of selective accessibility mechanisms. Four experiments were conducted to ascertain the evidence for selective accessibility with this test, evidence which was not obtained. A fifth experiment employed a different methodology, and again failed to show evidence for selective accessibility. Subsequent discussion suggests that the robustness of anchoring effects is remarkable, but the theoretical basis for some previous tests of the selective accessibility account of anchoring is shaky, and we advise against their use in this capacity. (PsycINFO Database Record (c) 2019 APA, all rights reserved).
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18
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Burton A, Stock M. Interactions Among Age, Sex, and Scanning Location in the Assessment of Rectus Femoris Echo Intensity. Med Sci Sports Exerc 2019. [DOI: 10.1249/01.mss.0000561512.83706.57] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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19
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Fissore RA, Burton A, Lykke-Hartmann K. Editorial: Molecular and Cellular Mechanisms in Reproduction and Early Development. Front Cell Dev Biol 2019; 7:36. [PMID: 30949478 PMCID: PMC6435482 DOI: 10.3389/fcell.2019.00036] [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] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Accepted: 02/27/2019] [Indexed: 11/13/2022] Open
Affiliation(s)
- Rafael A Fissore
- Department of Veterinary and Animal Sciences, University of Massachusetts, Amherst, MA, United States
| | - Adam Burton
- Institute of Epigenetics and Stem Cells, Helmholtz Zentrum München, München, Germany
| | - Karin Lykke-Hartmann
- Department of Biomedicine, C Aarhus University, Aarhus, Denmark.,Department of Clinical Medicine, Aarhus University, Aarhus, Denmark.,Department of Clinical Genetics, Aarhus University Hospital, Aarhus, Denmark
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20
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Api AM, Belsito D, Bhatia S, Botelho D, Browne D, Bruze M, Burton A, Buschmann J, Calow P, Dagli ML, Date M, Dekant W, Deodhar C, Fryer AD, Joshi K, Kromidas L, La Cava S, Lalko JF, Lapczynski A, Liebler DC, Miyachi Y, O'Brien D, Parakhia R, Patel A, Penning TM, Politano VT, Ritacco G, Romine J, Salvito D, Schultz TW, Shen J, Sipes IG, Thakkar Y, Tokura Y, Tsang S, Wahler J, Wall B, Wilcox DK. RIFM fragrance ingredient safety assessment, 3-methyl-5-(2,2,3-trimethyl-3-cyclopenten-1-yl)pent-4-en-2-ol, CAS Registry Number 67801-20-1. Food Chem Toxicol 2018; 115 Suppl 1:S143-S152. [PMID: 29305932 DOI: 10.1016/j.fct.2017.12.065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Revised: 12/14/2017] [Accepted: 12/29/2017] [Indexed: 11/29/2022]
Affiliation(s)
- A M Api
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ, 07677, USA.
| | - D Belsito
- Member RIFM Expert Panel, Columbia University Medical Center, Department of Dermatology, 161 Fort Washington Ave., New York, NY, 10032, USA
| | - S Bhatia
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ, 07677, USA
| | - D Botelho
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ, 07677, USA
| | - D Browne
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ, 07677, USA
| | - M Bruze
- Member RIFM Expert Panel, Malmo University Hospital, Department of Occupational & Environmental Dermatology, Sodra Forstadsgatan 101, Entrance 47, Malmo, SE, 20502, Sweden
| | - A Burton
- Member RIFM Expert Panel, School of Natural Resources & Environment, University of Michigan, Dana Building G110, 440 Church St., Ann Arbor, MI, 58109, USA
| | - J Buschmann
- Member RIFM Expert Panel, Fraunhofer Institute for Toxicology and Experimental Medicine, Nikolai-Fuchs-Strasse 1, 30625, Hannover, Germany
| | - P Calow
- Member RIFM Expert Panel, Humphrey School of Public Affairs, University of Minnesota, 301 19th Avenue South, Minneapolis, MN, 55455, USA
| | - M L Dagli
- Member RIFM Expert Panel, University of Sao Paulo, School of Veterinary Medicine and Animal Science, Department of Pathology, Av. Prof. dr. Orlando Marques de Paiva, 87, Sao Paulo, CEP 05508-900, Brazil
| | - M Date
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ, 07677, USA
| | - W Dekant
- Member RIFM Expert Panel, University of Wuerzburg, Department of Toxicology, Versbacher Str. 9, 97078, Würzburg, Germany
| | - C Deodhar
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ, 07677, USA
| | - A D Fryer
- Member RIFM Expert Panel, Oregon Health Science University, 3181 SW Sam Jackson Park Rd., Portland, OR, 97239, USA
| | - K Joshi
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ, 07677, USA
| | - L Kromidas
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ, 07677, USA
| | - S La Cava
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ, 07677, USA
| | - J F Lalko
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ, 07677, USA
| | - A Lapczynski
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ, 07677, USA
| | - D C Liebler
- Member RIFM Expert Panel, Vanderbilt University School of Medicine, Department of Biochemistry, Center in Molecular Toxicology, 638 Robinson Research Building, 2200 Pierce Avenue, Nashville, TN 37232-0146, USA
| | - Y Miyachi
- Member RIFM Expert Panel, Department of Dermatology, Kyoto University Graduate School of Medicine, 54 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto, 606-8507, Japan
| | - D O'Brien
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ, 07677, USA
| | - R Parakhia
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ, 07677, USA
| | - A Patel
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ, 07677, USA
| | - T M Penning
- Member of RIFM Expert Panel, University of Pennsylvania, Perelman School of Medicine, Center of Excellence in Environmental Toxicology, 1316 Biomedical Research Building (BRB) II/III, 421 Curie Boulevard, Philadelphia, PA, 19104-3083, USA
| | - V T Politano
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ, 07677, USA
| | - G Ritacco
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ, 07677, USA
| | - J Romine
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ, 07677, USA
| | - D Salvito
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ, 07677, USA
| | - T W Schultz
- Member RIFM Expert Panel, The University of Tennessee, College of Veterinary Medicine, Department of Comparative Medicine, 2407 River Dr., Knoxville, TN, 37996- 4500, USA
| | - J Shen
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ, 07677, USA
| | - I G Sipes
- Member RIFM Expert Panel, Department of Pharmacology, University of Arizona, College of Medicine, 1501 North Campbell Avenue, P.O. Box 245050, Tucson, AZ, 85724-5050, USA
| | - Y Thakkar
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ, 07677, USA
| | - Y Tokura
- Member RIFM Expert Panel, Department of Dermatology, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku, Hamamatsu, 431-3192, Japan
| | - S Tsang
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ, 07677, USA
| | - J Wahler
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ, 07677, USA
| | - B Wall
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ, 07677, USA
| | - D K Wilcox
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ, 07677, USA
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21
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Api A, Belsito D, Bhatia S, Botelho D, Browne D, Bruze M, Burton A, Buschmann J, Calow P, Dagli M, Date M, Dekant W, Deodhar C, Fryer A, Joshi K, Kromidas L, La Cava S, Lalko J, Lapczynski A, Liebler D, Miyachi Y, O'Brien D, Parakhia R, Patel A, Penning T, Politano V, Ritacco G, Romine J, Salvito D, Schultz T, Shen J, Sipes I, Thakkar Y, Tokura Y, Tsang S, Wahler J, Wall B, Wilcox D. RIFM fragrance ingredient safety assessment, terpineol, CAS Registry Number 8000-41-7. Food Chem Toxicol 2017; 110 Suppl 1:S392-S402. [DOI: 10.1016/j.fct.2017.07.042] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2017] [Revised: 07/10/2017] [Accepted: 07/20/2017] [Indexed: 10/19/2022]
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22
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Api AM, Belsito D, Bhatia S, Botelho D, Browne D, Bruze M, Burton A, Buschmann J, Calow P, Dagli ML, Date M, Dekant W, Deodhar C, Fryer AD, Joshi K, Kromidas L, La Cava S, Lalko JF, Lapczynski A, Liebler DC, Miyachi Y, O'Brien D, Parakhia R, Patel A, Penning TM, Politano VT, Ritacco G, Romine J, Salvito D, Schultz TW, Shen J, Sipes IG, Thakkar Y, Tokura Y, Tsang S, Wahler J, Wall B, Wilcox DK. RIFM fragrance ingredient safety assessment, tetrahydro-4-methyl-2-(2-methylpropen-1-yl)pyran, CAS Registry Number 16409-43-1. Food Chem Toxicol 2017; 110 Suppl 1:S645-S653. [PMID: 29032125 DOI: 10.1016/j.fct.2017.10.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Revised: 09/29/2017] [Accepted: 10/09/2017] [Indexed: 11/25/2022]
Affiliation(s)
- A M Api
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ 07677, USA.
| | - D Belsito
- Member RIFM Expert Panel, Columbia University Medical Center, Department of Dermatology, 161 Fort Washington Ave., New York, NY 10032, USA
| | - S Bhatia
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ 07677, USA
| | - D Botelho
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ 07677, USA
| | - D Browne
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ 07677, USA
| | - M Bruze
- Member RIFM Expert Panel, Malmo University Hospital, Department of Occupational & Environmental Dermatology, Sodra Forstadsgatan 101, Entrance 47, Malmo SE-20502, Sweden
| | - A Burton
- Member RIFM Expert Panel, School of Natural Resources & Environment, University of Michigan, Dana Building G110, 440 Church St., Ann Arbor, MI 58109, USA
| | - J Buschmann
- Member RIFM Expert Panel, Fraunhofer Institute for Toxicology and Experimental Medicine, Nikolai-Fuchs-Strasse 1, 30625 Hannover, Germany
| | - P Calow
- Member RIFM Expert Panel, Humphrey School of Public Affairs, University of Minnesota, 301 19th Avenue South, Minneapolis, MN 55455, USA
| | - M L Dagli
- Member RIFM Expert Panel, University of Sao Paulo, School of Veterinary Medicine and Animal Science, Department of Pathology, Av. Prof. dr. Orlando Marques de Paiva, 87, Sao Paulo CEP 05508-900, Brazil
| | - M Date
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ 07677, USA
| | - W Dekant
- Member RIFM Expert Panel, University of Wuerzburg, Department of Toxicology, Versbacher Str. 9, 97078 Würzburg, Germany
| | - C Deodhar
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ 07677, USA
| | - A D Fryer
- Member RIFM Expert Panel, Oregon Health Science University, 3181 SW Sam Jackson Park Rd., Portland, OR 97239, USA
| | - K Joshi
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ 07677, USA
| | - L Kromidas
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ 07677, USA
| | - S La Cava
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ 07677, USA
| | - J F Lalko
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ 07677, USA
| | - A Lapczynski
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ 07677, USA
| | - D C Liebler
- Member RIFM Expert Panel, Vanderbilt University School of Medicine, Department of Biochemistry, Center in Molecular Toxicology, 638 Robinson Research Building, 2200 Pierce Avenue, Nashville, TN 37232-0146, USA
| | - Y Miyachi
- Member RIFM Expert Panel, Department of Dermatology, Kyoto University Graduate School of Medicine, 54 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan
| | - D O'Brien
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ 07677, USA
| | - R Parakhia
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ 07677, USA
| | - A Patel
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ 07677, USA
| | - T M Penning
- Member of RIFM Expert Panel, University of Pennsylvania, Perelman School of Medicine, Center of Excellence in Environmental Toxicology, 1316 Biomedical Research Building (BRB) II/III, 421 Curie Boulevard, Philadelphia, PA 19104-3083, USA
| | - V T Politano
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ 07677, USA
| | - G Ritacco
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ 07677, USA
| | - J Romine
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ 07677, USA
| | - D Salvito
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ 07677, USA
| | - T W Schultz
- Member RIFM Expert Panel, The University of Tennessee, College of Veterinary Medicine, Department of Comparative Medicine, 2407 River Dr., Knoxville, TN 37996- 4500, USA
| | - J Shen
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ 07677, USA
| | - I G Sipes
- Member RIFM Expert Panel, Department of Pharmacology, University of Arizona, College of Medicine, 1501 North Campbell Avenue, P.O. Box 245050, Tucson, AZ 85724-5050, USA
| | - Y Thakkar
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ 07677, USA
| | - Y Tokura
- Member RIFM Expert Panel, Department of Dermatology, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku, Hamamatsu 431-3192, Japan
| | - S Tsang
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ 07677, USA
| | - J Wahler
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ 07677, USA
| | - B Wall
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ 07677, USA
| | - D K Wilcox
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ 07677, USA
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Abstract
The tripartite network of Prdm14, Blimp1, and AP2γ is essential for the important process of germ cell specification, but their precise molecular mechanisms of action remain lacking. Tu and colleagues (2016) report in Nature that the transcriptional co-repressor CBFA2T2 is an essential interactor protein regulating PRDM14 function, shedding light into the mechanisms directing germline formation and pluripotency.
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Affiliation(s)
- Adam Burton
- Institute of Epigenetics and Stem Cells, Helmholtz Zentrum München, 81377 München, Germany.
| | - Maria-Elena Torres-Padilla
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, INSERM U964, 67404 Illkirch, CU de Strasbourg, France; Institute of Epigenetics and Stem Cells, Helmholtz Zentrum München, 81377 München, Germany
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Api AM, Belsito D, Bhatia S, Botelho D, Browne D, Bruze M, Burton A, Buschmann J, Calow P, Dagli ML, Date M, Dekant W, Deodhar C, Fryer AD, Joshi K, Kromidas L, La Cava S, Lalko JF, Lapczynski A, Liebler DC, Miyachi Y, O'Brien D, Parakhia R, Patel A, Penning TM, Politano VT, Ritacco G, Romine J, Salvito D, Schultz TW, Shen J, Sipes IG, Thakkar Y, Tokura Y, Tsang S, Wahler J, Wall B, Wilcox DK. RIFM fragrance ingredient safety assessment, dihydro-α-terpineol, CAS Registry Number 498-81-7. Food Chem Toxicol 2017; 110 Suppl 1:S253-S262. [PMID: 28576468 DOI: 10.1016/j.fct.2017.05.063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2017] [Revised: 05/15/2017] [Accepted: 05/28/2017] [Indexed: 11/16/2022]
Affiliation(s)
- A M Api
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ 07677, USA.
| | - D Belsito
- Member RIFM Expert Panel, Columbia University Medical Center, Department of Dermatology, 161 Fort Washington Ave., New York, NY 10032, USA
| | - S Bhatia
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ 07677, USA
| | - D Botelho
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ 07677, USA
| | - D Browne
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ 07677, USA
| | - M Bruze
- Member RIFM Expert Panel, Malmo University Hospital, Department of Occupational & Environmental Dermatology, Sodra Forstadsgatan 101, Entrance 47, Malmo SE 20502, Sweden
| | - A Burton
- Member RIFM Expert Panel, School of Natural Resources & Environment, University of Michigan, Dana Building G110, 440 Church St., Ann Arbor, MI 58109, USA
| | - J Buschmann
- Member RIFM Expert Panel, Fraunhofer Institute for Toxicology and Experimental Medicine, Nikolai-Fuchs-Strasse 1, 30625 Hannover, Germany
| | - P Calow
- Member RIFM Expert Panel, Humphrey School of Public Affairs, University of Minnesota, 301 19th Avenue South, Minneapolis, MN 55455 USA
| | - M L Dagli
- Member RIFM Expert Panel, University of Sao Paulo, School of Veterinary Medicine and Animal Science, Department of Pathology, Av. Prof. dr. Orlando Marques de Paiva, 87, Sao Paulo CEP 05508-900, Brazil
| | - M Date
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ 07677, USA
| | - W Dekant
- Member RIFM Expert Panel, University of Wurzburg, Department of Toxicology, Versbacher Str. 9, 97078 Würzburg, Germany
| | - C Deodhar
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ 07677, USA
| | - A D Fryer
- Member RIFM Expert Panel, Oregon Health Science University, 3181 SW Sam Jackson Park Rd., Portland, OR 97239, USA
| | - K Joshi
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ 07677, USA
| | - L Kromidas
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ 07677, USA
| | - S La Cava
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ 07677, USA
| | - J F Lalko
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ 07677, USA
| | - A Lapczynski
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ 07677, USA
| | - D C Liebler
- Member RIFM Expert Panel, Vanderbilt University School of Medicine, Department of Biochemistry, Center in Molecular Toxicology, 638 Robinson Research Building, 2200 Pierce Avenue, Nashville, TN 37232-0146, USA
| | - Y Miyachi
- Member RIFM Expert Panel, Department of Dermatology, Kyoto University Graduate School of Medicine, 54 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan
| | - D O'Brien
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ 07677, USA
| | - R Parakhia
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ 07677, USA
| | - A Patel
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ 07677, USA
| | - T M Penning
- Member of RIFM Expert Panel, University of Pennsylvania, Perelman School of Medicine, Center of Excellence in Environmental Toxicology, 1316 Biomedical Research Building (BRB) II/III, 421 Curie Boulevard, Philadelphia, PA 19104-3083, USA
| | - V T Politano
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ 07677, USA
| | - G Ritacco
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ 07677, USA
| | - J Romine
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ 07677, USA
| | - D Salvito
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ 07677, USA
| | - T W Schultz
- Member RIFM Expert Panel, The University of Tennessee, College of Veterinary Medicine, Department of Comparative Medicine, 2407 River Dr., Knoxville, TN 37996- 4500, USA
| | - J Shen
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ 07677, USA
| | - I G Sipes
- Member RIFM Expert Panel, Department of Pharmacology, University of Arizona, College of Medicine, 1501 North Campbell Avenue, P.O. Box 245050, Tucson, AZ 85724-5050, USA
| | - Y Thakkar
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ 07677, USA
| | - Y Tokura
- Member RIFM Expert Panel, The Journal of Dermatological Science (JDS), Editor-in-Chief, Professor and Chairman, Department of Dermatology, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku, Hamamatsu 431-3192, Japan
| | - S Tsang
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ 07677, USA
| | - J Wahler
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ 07677, USA
| | - B Wall
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ 07677, USA
| | - D K Wilcox
- Research Institute for Fragrance Materials, Inc., 50 Tice Boulevard, Woodcliff Lake, NJ 07677, USA
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Standen PJ, Threapleton K, Richardson A, Connell L, Brown DJ, Battersby S, Platts F, Burton A. A low cost virtual reality system for home based rehabilitation of the arm following stroke: a randomised controlled feasibility trial. Clin Rehabil 2016; 31:340-350. [PMID: 27029939 PMCID: PMC5349317 DOI: 10.1177/0269215516640320] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Objective: To assess the feasibility of conducting a randomised controlled trial of a home-based virtual reality system for rehabilitation of the arm following stroke. Design: Two group feasibility randomised controlled trial of intervention versus usual care. Setting: Patients’ homes. Participants: Patients aged 18 or over, with residual arm dysfunction following stroke and no longer receiving any other intensive rehabilitation. Interventions: Eight weeks’ use of a low cost home-based virtual reality system employing infra-red capture to translate the position of the hand into game play or usual care. Main measures: The primary objective was to collect information on the feasibility of a trial, including recruitment, collection of outcome measures and staff support required. Patients were assessed at three time points using the Wolf Motor Function Test, Nine-Hole Peg Test, Motor Activity Log and Nottingham Extended Activities of Daily Living. Results: Over 15 months only 47 people were referred to the team. Twenty seven were randomised and 18 (67%) of those completed final outcome measures. Sample size calculation based on data from the Wolf Motor Function Test indicated a requirement for 38 per group. There was a significantly greater change from baseline in the intervention group on midpoint Wolf Grip strength and two subscales of the final Motor Activity Log. Training in the use of the equipment took a median of 230 minutes per patient. Conclusions: To achieve the required sample size, a definitive home-based trial would require additional strategies to boost recruitment rates and adequate resources for patient support.
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Affiliation(s)
- P J Standen
- 1 Division of Rehabilitation and Ageing, University of Nottingham, Nottingham, UK
| | - K Threapleton
- 2 School of Health Sciences, University of Nottingham, Nottingham, UK
| | - A Richardson
- 3 Derbyshire Community Health Services NHS Trust, Integrated Community Therapy Team, St. Oswalds Hospital, Ashbourne, UK
| | - L Connell
- 4 School of Nursing, University of Central Lancashire, Lancashire, UK
| | - D J Brown
- 5 Computing and Technology Team, School of Science and Technology, Nottingham Trent University, Nottingham, UK
| | - S Battersby
- 5 Computing and Technology Team, School of Science and Technology, Nottingham Trent University, Nottingham, UK
| | - F Platts
- 6 Sherwood Forest Hospitals NHS Foundation Trust, Mansfield Community Hospital, Nottinghamshire, UK
| | - A Burton
- 5 Computing and Technology Team, School of Science and Technology, Nottingham Trent University, Nottingham, UK
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Zomer E, Osborn D, Nazareth I, Blackburn R, Burton A, Hardoon S, Holt R, King M, Marston L, Morris S, Omar R, Petersen I, Walters K, Hunter R. Effectiveness and cost-effectiveness of a cardiovascular risk prediction algorithm for people with severe mental illness. Eur Psychiatry 2016. [DOI: 10.1016/j.eurpsy.2016.01.433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
IntroductionCardiovascular risk prediction tools are important for cardiovascular disease (CVD) prevention, however, which algorithms are appropriate for people with severe mental illness (SMI) is unclear.Objectives/aimsTo determine the cost-effectiveness using the net monetary benefit (NMB) approach of two bespoke SMI-specific risk algorithms compared to standard risk algorithms for primary CVD prevention in those with SMI, from an NHS perspective.MethodsA microsimulation model was populated with 1000 individuals with SMI from The Health Improvement Network Database, aged 30–74 years without CVD. Four cardiovascular risk algorithms were assessed; (1) general population lipid, (2) general population BMI, (3) SMI-specific lipid and (4) SMI-specific BMI, compared against no algorithm. At baseline, each cardiovascular risk algorithm was applied and those high-risk (> 10%) were assumed to be prescribed statin therapy, others received usual care. Individuals entered the model in a ‘healthy’ free of CVD health state and with each year could retain their current health state, have cardiovascular events (non-fatal/fatal) or die from other causes according to transition probabilities.ResultsThe SMI-specific BMI and general population lipid algorithms had the highest NMB of the four algorithms resulting in 12 additional QALYs and a cost saving of approximately £37,000 (US$ 58,000) per 1000 patients with SMI over 10 years.ConclusionsThe general population lipid and SMI-specific BMI algorithms performed equally well. The ease and acceptability of use of a SMI-specific BMI algorithm (blood tests not required) makes it an attractive algorithm to implement in clinical settings.Disclosure of interestThe authors have not supplied their declaration of competing interest.
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Chutteang C, Booker FL, Na-Ngern P, Burton A, Aoki M, Burkey KO. Biochemical and physiological processes associated with the differential ozone response in ozone-tolerant and sensitive soybean genotypes. Plant Biol (Stuttg) 2016; 18 Suppl 1:28-36. [PMID: 25959717 DOI: 10.1111/plb.12347] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2014] [Accepted: 05/06/2015] [Indexed: 06/04/2023]
Abstract
Biochemical and physiological traits of two soybean [Glycine max (L.) Merr.] genotypes differing in sensitivity to ozone (O3 ) were investigated to determine the possible basis for the differential response. Fiskeby III (O3 -tolerant) and Mandarin (Ottawa) (O3 -sensitive) were grown in a greenhouse with charcoal-filtered air for 4 weeks, then treated with O3 for 7 h·day(-1) in greenhouse chambers. Mandarin (Ottawa) showed significantly more leaf injury and hydrogen peroxide (H2 O2 ) and superoxide (O2 (-) ) production compared with Fiskeby III. Peroxidase activity in Mandarin (Ottawa) was 31% higher with O3 but was not significantly different in Fiskeby III. Ozone did not affect superoxide dismutase or glutathione reductase activities, or leaf concentrations of glutathione or ascorbic acid. Thus, variation in O3 response between Fiskeby III and Mandarin (Ottawa) was not explained by differences in antioxidant enzymes and metabolites tested. Ethylene emission from leaves declined in Fiskeby III following O3 exposure but not in Mandarin (Ottawa). Ozone exposure reduced quantum yield (ΦPSII ), electron transport rate (ETR) and photochemical quenching (qp ) in Mandarin (Ottawa) more than in Fiskeby III, indicating that efficiency of energy conversion of PSII and photosynthetic electron transport was altered differently in the two genotypes. Short-term exposure to O3 had minimal effects on net carbon exchange rates of both soybean cultivars. A trend toward higher stomatal conductance in Mandarin (Ottawa) suggested stomatal exclusion might contribute to differential O3 sensitivity of the two genotypes. Increased sensitivity of Mandarin (Ottawa) to O3 was associated with higher H2 O2 and O2 (-) production compared with Fiskeby III, possibly associated with genotype differences in stomatal function or regulation of ethylene during the initial phases of O3 response.
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Affiliation(s)
- C Chutteang
- Department of Agronomy, Faculty of Agriculture at Kamphaeng Saen, Kasetsart University, Nakhon Pathom, Thailand
| | - F L Booker
- U.S. Department of Agriculture, Agricultural Research Service, Plant Science Research, and Department of Crop Science, North Carolina State University, Raleigh, NC, USA
| | - P Na-Ngern
- Sustainability Management Project, Petroleum Authority of Thailand Public Company Limited, Chatuchak, Bangkok, Thailand
| | - A Burton
- U.S. Department of Agriculture, Agricultural Research Service, Plant Science Research, and Department of Crop Science, North Carolina State University, Raleigh, NC, USA
| | - M Aoki
- Science Council of Japan, Cabinet Office of Japan, Roppongi, Minato-ku, Tokyo, Japan
| | - K O Burkey
- U.S. Department of Agriculture, Agricultural Research Service, Plant Science Research, and Department of Crop Science, North Carolina State University, Raleigh, NC, USA
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Hartmann G, Kumar S, Johns D, Gheyas F, Gutstein D, Shen X, Burton A, Lederman H, Lutz R, Jackson T, Chavez-Eng C, Mitra K. Disposition into Adipose Tissue Determines Accumulation and Elimination Kinetics of the Cholesteryl Ester Transfer Protein Inhibitor Anacetrapib in Mice. Drug Metab Dispos 2015; 44:428-34. [DOI: 10.1124/dmd.115.067736] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2015] [Accepted: 12/23/2015] [Indexed: 12/31/2022] Open
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Taylor J, Dubé K, Evans D, Sylla L, Burton A, Skinner A, Greene S. Emerging results of an extensive survey of potential participants’ willingness to take risks in and donate to HIV cure research in the United States. J Virus Erad 2015. [DOI: 10.1016/s2055-6640(20)31329-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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Nidever DL, Holtzman JA, Prieto CA, Beland S, Bender C, Bizyaev D, Burton A, Desphande R, Fleming SW, García Pérez AE, Hearty FR, Majewski SR, Mészáros S, Muna D, Nguyen D, Schiavon RP, Shetrone M, Skrutskie MF, Sobeck JS, Wilson JC. THE DATA REDUCTION PIPELINE FOR THE APACHE POINT OBSERVATORY GALACTIC EVOLUTION EXPERIMENT. ACTA ACUST UNITED AC 2015. [DOI: 10.1088/0004-6256/150/6/173] [Citation(s) in RCA: 249] [Impact Index Per Article: 27.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Burton A, Silva IDS, Hipwell J, Flugelman A, Kwong A, Peplonska B, Tamimi RM, Bertrand K, Vachon C, Hartman M, Lee CPL, Chia KS, Nagata C, Salem D, Sirous R, Maskarinec G, Ursin G, Dickens C, Lee JW, Kim J, Giles G, Krishnan K, Pereira A, Garmendia ML, Perez-Gomez B, Pollan M, Lajous M, Rice M, Van Gils C, Wanders H, Teo S, Mariapun S, Vinayak S, Ndumia R, Ozmen V, Stone J, Hopper J, Boyd N, McCormack V. PP01 International pooling project of mammographic density - insights of a marker of breast cancer risk from 22 diverse countries. Br J Soc Med 2015. [DOI: 10.1136/jech-2015-206256.99] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Burton A. Building cities for physical inactivity? What do urban planners understand about their role in public health and physical activity. J Sci Med Sport 2014. [DOI: 10.1016/j.jsams.2014.11.153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Abstract
Following fertilization, gametes undergo epigenetic reprogramming in order to revert to a totipotent state. How embryonic cells subsequently acquire their fate and the role of chromatin dynamics in this process are unknown. Genetic and experimental embryology approaches have identified some of the players and morphological changes that are involved in early mammalian development, but the exact events underlying cell fate allocation in single embryonic cells have remained elusive. Experimental and technological advances have recently provided novel insights into chromatin dynamics and nuclear architecture in single cells; these insights have reshaped our understanding of the mechanisms underlying cell fate allocation and plasticity in early mammalian development.
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Affiliation(s)
- Adam Burton
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, CNRS/INSERM U964, Université de Strasbourg, F-67404 ILLKIRCH, Cité Universitaire de Strasbourg, France
| | - Maria-Elena Torres-Padilla
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, CNRS/INSERM U964, Université de Strasbourg, F-67404 ILLKIRCH, Cité Universitaire de Strasbourg, France
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Le ST, Kanesan T, Bausi F, Haigh PA, Rajbhandari S, Ghassemlooy Z, Papakonstantinou I, Popoola WO, Burton A, Le Minh H, Cacialli F, Ellis AD. 10 Mb/s visible light transmission system using a polymer light-emitting diode with orthogonal frequency division multiplexing. Opt Lett 2014; 39:3876-3879. [PMID: 24978760 DOI: 10.1364/ol.39.003876] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We present a newly designed polymer light-emitting diode with a bandwidth of ~350 kHz for high-speed visible light communications. Using this new polymer light-emitting diode as a transmitter, we have achieved a record transmission speed of 10 Mb/s for a polymer light-emitting diode-based optical communication system with an orthogonal frequency division multiplexing technique, matching the performance of single carrier formats using multitap equalization. For achieving such a high data-rate, a power pre-emphasis technique was adopted.
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Craig P, Bancroft G, Burton A, Collier S, Shaylor P, Sinha A. Raised levels of metal ions in the blood in patients who have undergone uncemented metal-on-polyethylene Trident-Accolade total hip replacement. Bone Joint J 2014; 96-B:43-7. [PMID: 24395309 DOI: 10.1302/0301-620x.96b1.30923] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The issues surrounding raised levels of metal ions in the blood following large head metal-on-metal total hip replacement (THR), such as cobalt and chromium, have been well documented. Despite the national popularity of uncemented metal-on-polyethylene (MoP) THR using a large-diameter femoral head, few papers have reported the levels of metal ions in the blood following this combination. Following an isolated failure of a 44 mm Trident-Accolade uncemented THR associated with severe wear between the femoral head and the trunnion in the presence of markedly elevated levels of cobalt ions in the blood, we investigated the relationship between modular femoral head diameter and the levels of cobalt and chromium ions in the blood following this THR. A total of 69 patients received an uncemented Trident-Accolade MoP THR in 2009. Of these, 43 patients (23 men and 20 women, mean age 67.0 years) were recruited and had levels of cobalt and chromium ions in the blood measured between May and June 2012. The patients were then divided into three groups according to the diameter of the femoral head used: 12 patients in the 28 mm group (controls), 18 patients in the 36 mm group and 13 patients in the 40 mm group. A total of four patients had identical bilateral prostheses in situ at phlebotomy: one each in the 28 mm and 36 mm groups and two in the 40 mm group. There was a significant increase in the mean levels of cobalt ions in the blood in those with a 36 mm diameter femoral head compared with those with a 28 mm diameter head (p = 0.013). The levels of cobalt ions in the blood were raised in those with a 40 mm diameter head but there was no statistically significant difference between this group and the control group (p = 0.152). The levels of chromium ions in the blood were normal in all patients. The clinical significance of this finding is unclear, but we have stopped using femoral heads with a diameter of ≤ 36 mm, and await further larger studies to clarify whether, for instance, this issue particularly affects this combination of components.
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Affiliation(s)
- P Craig
- Oswestry/Stoke Orthopaedic Training Programme, Postgraduate Office, Institute of Orthopaedics, The Robert Jones & Agnes Hunt Orthopaedic Hospital NHS Foundation Trust, Oswestry, Shropshire SY10 7AG, UK
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Bosch-Capblanch X, Banerjee K, Burton A. Unvaccinated children in years of increasing coverage: how many and who are they? Evidence from 96 low- and middle-income countries. Trop Med Int Health 2012; 17:697-710. [PMID: 22943300 DOI: 10.1111/j.1365-3156.2012.02989.x] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE While childhood immunisation coverage levels have increased since the 70s, inequities in coverage between and within countries have been widely reported. Unvaccinated children remain undetected by routine monitoring systems and strikingly unreported. The objective of this study was to provide evidence on the magnitude of the problem and to describe predictors associated with non-vaccination. METHODS Two hundred and forty-one nationally representative household surveys in 96 countries were analysed. Proportions and changes in time of 'unvaccinated' (children having not received a single dose of vaccine), 'partially vaccinated' and 'fully vaccinated' children were estimated. Predictors of non-vaccination were explored. RESULTS The percentage of unvaccinated children was 9.9% across all surveys. 66 countries had more than one survey: 38 showed statistically significant reductions in the proportion of unvaccinated children between the first and last survey, 10 countries showed increases and the rest showed no significant changes. However, while 18 of the 38 countries also improved in terms of partially and fully vaccinated, in the other 20 the proportion of fully vaccinated decreased. The predictors more strongly associated with being unvaccinated were education of the caregiver, education of caregiver's partner, caregiver's tetanus toxoid (TT) status, wealth index and type of family member participation in decision-making when the child is ill. Multivariable logistic regression identified the TT status of the caregiver as the strongest predictors of unvaccinated children. Country-specific summaries were produced and sent to countries. CONCLUSION The number of unvaccinated children is not negligible and their proportion and the predictors of non-vaccination have to be drawn from specific surveys. Specific vaccine indicators cannot properly describe the performance of immunisation programmes in certain situations. National immunisation programmes and national and international immunisation stakeholders should also consider monitoring the proportion of unvaccinated children (i.e. those who have received no vaccines at all) and draw specific plans on the determinants of non-vaccination.
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Shields C, Roberts L, Munnar K, Jangwal H, Tong D, Beale J, Phan M, Burton A, Collins B, Scully C, Rowe M, Cheong Y, Proimos G, Fernando D, Goods C, New G. A Decade of PCI Experience with Off-site Surgical Back-up at Box Hill Hospital: What Have We Learnt? Heart Lung Circ 2012. [DOI: 10.1016/j.hlc.2012.05.363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Sinclair J, Burton A, Ashcroft R, Priebe S. Clinician and service user perceptions of implementing contingency management: a focus group study. Drug Alcohol Depend 2011; 119:56-63. [PMID: 21680110 PMCID: PMC3629561 DOI: 10.1016/j.drugalcdep.2011.05.016] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/18/2011] [Revised: 05/16/2011] [Accepted: 05/16/2011] [Indexed: 12/02/2022]
Abstract
BACKGROUND Contingency management (CM), despite the evidence base for its effectiveness, remains controversial, with sub-optimal implementation. In 2007, UK guidelines recommended the use of CM in publicly funded services, but uptake has also been minimal. Previous surveys of service providers suggest differences in opinions about CM, but to date there has been no published involvement of service users in this debate. METHOD Focus group methodology was used to explore systematically the attitudes, concerns and opinions of staff and service users about the use of CM, in publicly funded substance misuse services, to identify the key areas that may be influential in terms of implementation and outcome. Data were analysed thematically using the constant comparative method. RESULTS 70 staff and service users participated in 9 focus groups. 15 themes of discussion around CM were identified, grouped into four categories: how CM was aligned to the philosophy of substance misuse services; the practicalities of implementation; wider ethical concerns; and how participants perceived the evidence for effectiveness. CONCLUSIONS Robust process evaluation in different treatment systems is needed to define the active components of CM for implementation. Involvement of service users in this process is essential and is likely to provide valuable insights into the mechanism of action of CM and its effectiveness and uptake within complex treatment systems.
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Affiliation(s)
- J.M.A. Sinclair
- University of Southampton School of Medicine, Southampton SO14 3DT, UK,Corresponding author at: University Department of Psychiatry, Academic Centre, College Keep, 4-12 Terminus Terrace, Southampton SO14 3DT, UK. Tel.: +44 2380 718 520; fax: +44 2380 718 533.
| | - A. Burton
- Queen Mary University of London, Unit for Social and Community Psychiatry, Newham Centre for Mental Health, London E13 8SP, UK
| | - R. Ashcroft
- Queen Mary University of London, London E1 4NS, UK
| | - S. Priebe
- Queen Mary University of London, Unit for Social and Community Psychiatry, Newham Centre for Mental Health, London E13 8SP, UK
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Burton A, Martin R, Holly J, Hamdy F, Neal D, Donovan J, Tilling K. P2-34 Association of anthropometric and lifestyle factors with prostate specific antigen (PSA) trajectories in men with localised prostate cancer undergoing active monitoring. Br J Soc Med 2011. [DOI: 10.1136/jech.2011.142976h.70] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Abstract
Following hip hemiarthroplasty, a metal femoral head articulates against natural acetabular cartilage. Cartilage friction and wear may be influenced by variables including loading time, contact stress, contact area, sliding distance, and sliding speed. The aim of this study was to investigate the effect of these variables on cartilage friction, deformation and wear in a simulation using idealized geometry model. Bovine cartilage pins were reciprocated against metal plates to mimic a hemiarthroplasty articulation under static loading. The effective coefficient of friction (µeff) under contact stresses (0.5 to 16 MPa), contact areas (12 and 64 mm2), stroke lengths (4 and 8 mm), sliding velocities (4 and 8 mm/s), and loading time (1 and 24 hours) were studied. The permanent deformation of cartilage (after 24 hours of recovery) with and without motion was recorded to assess cartilage linear wear. The µeff was found to remain < 0.35 with contact stresses ≤ 4 MPa. Severe damage to the cartilage occurred at contact stresses > 8 MPa and significantly increased µeff after 12 hours of reciprocation. In long-term, contact area had no significant effect on µeff, and sliding distance and velocity only affected µeff under low contact stresses. The cartilage linear wear increased with contact stress, sliding distance and velocity.
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Affiliation(s)
- J Lizhang
- Institute of Medical and Biological Engineering, School of Mechanical Engineering, University of Leeds, Leeds, LS2 9JT, UK
| | - J Fisher
- Institute of Medical and Biological Engineering, School of Mechanical Engineering, University of Leeds, Leeds, LS2 9JT, UK
| | - Z Jin
- Institute of Medical and Biological Engineering, School of Mechanical Engineering, University of Leeds, Leeds, LS2 9JT, UK
| | - A Burton
- DePuy International Ltd, Leeds, LS11 9DT, UK
| | - S Williams
- Institute of Medical and Biological Engineering, School of Mechanical Engineering, University of Leeds, Leeds, LS2 9JT, UK
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Burton A, Torres-Padilla ME. Epigenetic reprogramming and development: a unique heterochromatin organization in the preimplantation mouse embryo. Brief Funct Genomics 2010; 9:444-54. [PMID: 21186177 DOI: 10.1093/bfgp/elq027] [Citation(s) in RCA: 103] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Fertilization of the oocyte by the sperm results in the formation of a totipotent zygote, in which the maternal and paternal chromatin is enclosed in two pronuclei undergoing distinct programmes of transcriptional activation and chromatin remodelling. The highly packaged paternal chromatin delivered by the sperm is decondensed and acquires a number of specific epigenetic marks, but markedly remains devoid of those usually associated with constitutive heterochromatin. During this period the maternal chromatin remains relatively stable except for marks associated with transcription and/or replication such as arginine methylation and H3/H4 acetylation. The embryo then undergoes a series of mitotic divisions without significant additional growth but differentiation, resulting in the formation of a blastocyst containing distinct cell types. The chromatin remodelling events during these stages are likely to be important in establishing the nuclear foundations required for later triggers of differentiation. Overall, we summarize three important points during these earliest reprogramming events: (i) relatively stable maternal chromatin after fertilization, (ii) rapid acquisition of specific histone marks by the paternal chromatin during the hours that follow fertilization and (iii) rapid remodelling of constitutive heterochromatic marks and modifications in the core of the nucleosome from the first mitotic division. These features are likely to be required for the creation of a chromatin environment compatible with cellular reprogramming and plasticity.
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Burton A, Hargadon B, Murphy A, Brightling C, Pavord I, Wardlaw A, Bradding P, Green R. P20 The eligibility of patients with difficult asthma for omalizumab since the change to the treatment criteria. Thorax 2010. [DOI: 10.1136/thx.2010.150961.20] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Madhok BM, Yeluri S, Haigh K, Burton A, Broadhead T, Jayne DG. Parenteral nutrition for patients with advanced ovarian malignancy. J Hum Nutr Diet 2010; 24:187-91. [DOI: 10.1111/j.1365-277x.2010.01127.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Abstract
Soluble inositol polyphosphates represent a variegate class of signalling molecules essential for the function of disparate cellular processes. Recently, the phytic acid derivate inositol pyrophosphate, InsP(7) (PP-IP(5) or IP(7)) has been shown to pyro-phosphorylate proteins in a kinase independent way. To begin to understand the functional importance of this new phosphorylation mechanism, a source of cold and radiolabelled InsP(7) is indispensable. However, cold InsP(7) is expensive to buy, and labelled InsP(7) is not commercially available. Here we provide a protocol to synthesise and purify InsP(7) to a level of purity required for in vivo and in vitro experiments. We begin by purifying recombinant mouse inositol hexakisphosphate kinase (IP6K1) from Escherichia coli. With purified IP6K1, we produce cold InsP(7) and 5beta[(32)P] InsP(7) that we subsequently use in vitro experiments to phosphorylate proteins extracts from different species.
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Affiliation(s)
- Cristina Azevedo
- Medical Research Council Cell Biology Unit and Laboratory for Molecular Cell Biology, Department of Cell Biology, University College London, London, UK
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45
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Bovolo CI, Blenkinsop S, Majone B, Zambrano-Bigiarini M, Fowler HJ, Bellin A, Burton A, Barceló D, Grathwohl P, Barth JAC. Climate Change, Water Resources and Pollution in the Ebro Basin: Towards an Integrated Approach. The Handbook of Environmental Chemistry 2010. [DOI: 10.1007/698_2010_86] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
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Abstract
The inositol polyphosphate family of small, cytosolic molecules has a prominent place in the field of cell signalling, and inositol pyrophosphates are the most recent addition to this large family. First identified in 1993, they have since been found in all eukaryotic organisms studied. The defining feature of inositol pyrophosphates is the presence of the characteristic 'high energy' pyrophosphate group, which immediately attracted interest in them as possible signalling molecules. In addition to their unique 'high energy' pyrophosphate bond, their concentration in the cell is tightly regulated with an extremely rapid turnover. This, together with the history of other inositol polyphosphates, makes it likely that they have an important role in intracellular signalling involving some basic cellular processes. This hypothesis is supported by the surprisingly wide range of cellular functions where inositol pyrophosphates seem to be involved. A seminal finding was that inositol pyrophosphates are able to directly phosphorylate pre-phosphorylated proteins, thereby identifying an entirely new post-translational protein modification, namely serine-pyrophosphorylation. Rapid progress has been made in characterising the metabolism of these molecules in the 15 years since their first identification. However, their detailed signalling role in specific cellular processes and in the context of relevant physiological cues has developed more slowly, particularly in mammalian system. We will discuss inositol pyrophosphates from the cell signalling perspective, analysing how their intracellular concentration is modulated, what their possible molecular mechanisms of action are, together with the physiological consequences of this novel form of signalling.
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Affiliation(s)
- Adam Burton
- Medical Research Council, Cell Biology Unit, Laboratory for Molecular Cell Biology, Department of Cell and Developmental Biology, University College London, London, UK
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Affiliation(s)
- M. N. Saulez
- Department of Companion Animal Clinical Studies; Equine Internal Medicine; Faculty of Veterinary Science; Private Bag X04 Ondersterpoort 0110 South Africa
| | - A. Burton
- Cornell University Hospital for Animals; Cornell University; Ithaca New York USA
| | - J. C. A. Steyl
- Department of Pathology; Faculty of Veterinary Science; University of Pretoria; South Africa
| | - J. H. Williams
- Department of Pathology; Faculty of Veterinary Science; University of Pretoria; South Africa
| | - S. J. Clift
- Department of Pathology; Faculty of Veterinary Science; University of Pretoria; South Africa
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Galvin A, Brockett C, Williams S, Hatto P, Burton A, Isaac G, Stone M, Ingham E, Fisher J. Comparison of wear of ultra-high molecular weight polyethylene acetabular cups against surface-engineered femoral heads. Proc Inst Mech Eng H 2008; 222:1073-80. [PMID: 19024155 DOI: 10.1243/09544119jeim407] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Alumina ceramic heads have been previously shown to reduce polyethylene wear in comparison to cobalt chrome (CoCr) heads in artificial hip joints. However, there are concerns about the brittle nature of ceramics. It is therefore of interest to investigate ceramic-like coatings on metallic heads. The aim of this study was to compare the friction and wear of ultra-high molecular weight polyethylene (UHMWPE) against alumina ceramic, CoCr, and surface-engineered ceramic-like coatings in a friction simulator and a hip joint simulator. All femoral heads tested were 28 mm diameter and included: Biolox Forte alumina, CoCr, arc evaporative physical vapour deposition (AEPVD) chromium nitride (CrN) coated CoCr, plasma-assisted chemical vapour deposition (PACVD) amorphous diamond-like carbon (aDLC) coated CoCr, sputter CrN coated CoCr, reactive gas controlled arc (RGCA) AEPVD titanium nitride (TiN) coated CoCr, and Graphit-iC coated CoCr. These were articulated against UHMWPE acetabular cups in a friction simulator and a hip joint simulator. Alumina and CoCr gave the lowest wear volumes whereas the sputter coated CrN gave the highest. Alumina also had the lowest friction factor. There was an association between surface parameters and wear. This study indicates that surface topography of surface-engineered femoral heads is more important than friction and wettability in controlling UHMWPE wear.
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Affiliation(s)
- A Galvin
- Institute of Medical and Biological Engineering, School of Mechanical Engineering, University of Leeds, Leeds, LS2 9JT, UK.
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Draskovic P, Saiardi A, Bhandari R, Burton A, Ilc G, Kovacevic M, Snyder SH, Podobnik M. Inositol hexakisphosphate kinase products contain diphosphate and triphosphate groups. ACTA ACUST UNITED AC 2008; 15:274-86. [PMID: 18355727 DOI: 10.1016/j.chembiol.2008.01.011] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2007] [Revised: 12/07/2007] [Accepted: 01/23/2008] [Indexed: 10/22/2022]
Abstract
Eukaryotic cells produce a family of diverse inositol polyphosphates (IPs) containing pyrophosphate bonds. Inositol pyrophosphates have been linked to a wide range of cellular functions, and there is growing evidence that they act as second messengers. Inositol hexakisphosphate kinase (IP6K) is able to convert the natural substrates inositol pentakisphosphate (IP 5) and inositol hexakisphosphate (IP 6) to several products with an increasing number of phospho-anhydride bonds. In this study, we structurally analyzed IPs synthesized by three mammalian isoforms of IP6K from IP 5 and IP 6. The NMR and mass analyses showed a number of products with diverse, yet specific, stereochemistry, defined by the architecture of IP6K's active site. We now report that IP6K synthesizes both pyrophosphate (diphospho) as well as triphospho groups on the inositol ring. All three IP6K isoforms share the same activities both in vitro and in vivo.
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Affiliation(s)
- Petra Draskovic
- Department of Biosynthesis and Biotransformation, National Institute of Chemistry, Hajdrihova 19, 1000 Ljubljana, Slovenia
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Åberg G, Aigbirhio FI, Alexakis E, Al-Maharik N, Almi M, Ambacher Y, Andersson S, Athlan A, Badman G, Baldwin SA, Baumann M, Baxendale IR, Botting NP, Bragg RA, Brown JA, Burton A, Bushby N, Cable K, Campbell G, Carr R, Carroll M, Chen L, Christlieb M, Davies P, Ellames GJ, Ellis W, Elmore C, Fryatt T, Geach N, Harding JR, Hartmann S, Harwood S, Hayward JJ, Henderson PJF, Herbert RB, Heys JR, Hölzl S, Hopkin MD, Horn P, Ilyas T, Irvine S, Jackson SD, Jin J, Keats A, Kennedy AR, Kerr WJ, Kitching MO, Landreau C, Lanners S, Lawrence R, Lawrie KWM, Ley SV, Little G, Lockley WJS, Maier D, Manning C, McNeill A, Middleton DA, Montgomery S, Morrison JJ, Mrzljak L, Newman J, Newsome J, Nikbin-Roudsari N, Nilsson GN, Oldfield MF, Patching SG, Procter DJ, Randall G, Robertson AA, Rummel CS, Rustidge D, Sherhod R, Shipley N, Smith CD, Smith CJ, Smith DI, Song C, Tamborini L, Waterhouse I, Watts A, Werkheiser JL, Williams G, Willis CL, Woodward P, Yan R, Young G, Zhang Q. 16th International Isotope Society (UK group) Symposium. J Labelled Comp Radiopharm 2008. [DOI: 10.1002/jlcr.1513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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