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Natoli A, Jones MD, Long V, Mouatt B, Walker ED, Gibbs MT. How do people with chronic low back pain perceive specific and general exercise? A mixed methods survey. Pain Pract 2024. [PMID: 38379359 DOI: 10.1111/papr.13354] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2024]
Abstract
PURPOSE Exercise prescriptions for chronic low back pain (CLBP) often utilize reductionistic, trunk-focused exercise aimed at addressing proposed pain mechanisms. It is unknown if the use of these trunk-focused exercises imply beliefs to people with CLBP about the rationale for their use (e.g., etiology), even without concurrent biomedical narratives. This study aimed to explore people's perceptions of specific and general exercise without an accompanying narrative when experiencing CLBP. METHODS An anonymous online survey was distributed. Mixed methods were utilized for analysis. Six-point Likert scales categorized people's beliefs about individual exercises. Open-ended questions were used to gather further beliefs which were then coded into themes. RESULTS People with CLBP perceived specific exercise as more beneficial than general exercise. Eight themes and five subthemes were defined. A high volume of positive beliefs were centered around strengthening the low back and abdominal musculature, emphasizing the importance of correct technique. Negative beliefs were held against spinal flexion and external load. Both positive and negative beliefs were underpinned by spinal/pelvic stability being important as well as certain exercises being achievable or not. CONCLUSION This study demonstrated that people with CLBP consider specific exercises to be more beneficial than general exercises for CLBP. Specific exercises irrespective of an accompanying narrative can imply meaning about the intent of an exercise. Understanding this requires practitioners to be mindful when prescribing and communicating exercise.
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Affiliation(s)
- A Natoli
- School of Health Sciences, Faculty of Medicine & Health, University of New South Wales, Sydney, New South Wales, Australia
| | - M D Jones
- School of Health Sciences, Faculty of Medicine & Health, University of New South Wales, Sydney, New South Wales, Australia
- Centre for Pain IMPACT, Neuroscience Research Australia, Randwick, New South Wales, Australia
| | - V Long
- School of Health Sciences, Faculty of Medicine & Health, University of New South Wales, Sydney, New South Wales, Australia
| | - B Mouatt
- IIMPACT in Health, Allied Health and Human Performance, University of South Australia, Adelaide, South Australia, Australia
| | - E D Walker
- School of Health Sciences, Faculty of Medicine & Health, University of New South Wales, Sydney, New South Wales, Australia
| | - M T Gibbs
- School of Health Sciences, Faculty of Medicine & Health, University of New South Wales, Sydney, New South Wales, Australia
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2
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Ashby BS, Jones MD. A discrete choice experiment to identify patient preferences for the provision of NHS medicines helpline services. International Journal of Pharmacy Practice 2022. [DOI: 10.1093/ijpp/riac019.036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Abstract
Introduction
Medicines helplines for patients discharged from NHS hospitals can prevent medicines-related harm (1). They are an underused service, which is partly attributed to under-resourcing and consequent inability to meet NHS standards (2). There is no evidence to inform which elements of these standards should be prioritised to increase patient access.
Aim
To measure patient preferences for different attributes of the provision of medicines helpline services using a discrete choice experiment (DCE).
Methods
The International Society for Pharmacoeconomics and Outcomes Research good research practices were used to conduct a DCE. Adult members of the NHS ‘Research for the Future’ database who regularly take ≥1 prescribed medicine (or care for someone for does) completed an online survey. The survey presented ten pairs of helplines, each helpline described by seven attributes. Participants chose which helpline from each pair they would prefer to contact with a query following discharge. The attributes of each helpline were defined using standard descriptors (levels) selected with a D-efficient experimental design from two to four options. Twenty helpline pairs were blocked into two survey variants. Participants’ overall preferences for each attribute level were obtained using conditional logit regression and expressed as willingness for the NHS to pay (WTP).
Results
460 participants completed a survey (53% female, aged 20-91 years, mean number of regular medicines: 6.0). All attributes significantly affected patient preferences (p<0.001). Participants’ WTP for key characteristics are shown in the table.
Conclusion
Hospitals providing a medicines helpline should prioritise seven-day opening for extended hours with queries answered on the same day, as these attributes are valued most by potential patients. Other attributes, such as alternative means of contact or a locally based helpline are also valued, but to a lesser extent. Further analysis is required to determine the influence of participant characteristics on their preferences. Use of a DCE with experimental design and a large sample size has enabled patient preferences to be quantified with reasonable precision. However, findings are limited by the method of recruitment, as all participants had internet access and certain groups were over-represented in the sample (e.g. white ethnicity, university educated, higher income).
References
(1) Williams M, Jordan A, Scott J, Jones MD. A systematic review examining the effectiveness of medicines information services for patients and the general public. Int J Pharm Pract. 2020; 28(1): 26-40.
(2) Williams M, Jordan A, Scott J, Jones MD. Operating a patient medicines helpline: A survey study exploring current practice in England using the RE-AIM evaluation framework. BMC Health Serv Res. 2018; 18:868.
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Affiliation(s)
- B S Ashby
- Institute for Mathematical Innovation, University of Bath, Bath, UK
| | - M D Jones
- Department of Pharmacy and Pharmacology, University of Bath, Bath, UK
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3
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Sinclair AG, Ellick J, Kehoe M, Hall L, Lamb J, Norman A, Jones MD. Service evaluation of the efficiency of moving discharge medicine request screening from the dispensary to hospital wards over a two-year period. International Journal of Pharmacy Practice 2022. [PMCID: PMC9383617 DOI: 10.1093/ijpp/riac019.066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Introduction It is a common patient perception that their discharge from hospital is delayed by waiting for medicines (1). However, it is important to consider the entire discharge process when addressing this problem (2). In our large tertiary referral hospital, clinical pharmacy services were moved from wards to the dispensary following a staffing crisis during 2018. Ward-based services were reintroduced in 2020, but doubts remained over the practicality and benefits of doing this. Aim To compare the efficiency of ward and dispensary based clinical pharmacy services in our hospital in terms of interventions made and time taken. Methods We completed an observational service evaluation. Data on the time taken to process discharge medication requests with the dispensary-based service were collected retrospectively from the hospital electronic discharge system for 12 months (2018) for five medical wards. Equivalent data for the ward-based service were collected prospectively over three days (2020) by pharmacists delivering the service to seven medical wards, as this was considered more accurate, and several process steps did not exist in the ward-based model. For example, prescriber sending request to pharmacy and pharmacy acknowledging receipt of a request. The prospective data collection period was curtailed by Covid-19. Descriptive statistics were produced using Excel. Results Using the dispensary-based service (2018), 4459 medicine requests were processed from 5 medical wards, during a 12-month period. The mean time between prescribing and reaching the screening pharmacist was 175 minutes [95%CI ± 25.4]. It took an estimated time of 62 minutes [95%CI ± 2.99] to screen and resolve an intervention, with a mean of 3 interventions/ward/day. In 2020, using the ward-based approach to clinical pharmacy which screened medicine requests on the ward, 142 requests were screened over three days from seven wards, with no delay between prescribing and clinical screening. It took a mean of 17 minutes [95%CI ± 10.63] to screen and resolve an intervention, with a mean of 15 interventions/ward/day. Conclusion Ward based pharmacy yielded five times more interventions, took an average of 45 minutes less to screen and resolve issues per request and removed 175 minutes of process time. The additional time required to resolve issues identified in the dispensary-based screening process was thought to be the delay in contacting either the appropriate member of the ward staff referencing a particular patient for information or identifying and contacting the prescriber, or a combination of both. This study is limited by the long delay between data collection periods and the small sample size in 2020, but the differences between the two systems were large and there had been few other changes to hospital systems. Other limitations include changes related to Covid-19 and the lack of a control group, so it is not possible to establish a causal relationship between the type of pharmacy service and study outcomes. References (1) Wright S, Morecroft CW, Mullen R, Ewing AB. UK hospital patient discharge: the patient perspective. Eur J Hosp Pharm. 2017 Nov;24(6):338-342. (2) Green CF, Hunter L, Jones L, Morris K. The TTO Journey: How much of it is actually in pharmacy? Pharm Man. 2015 Oct;31(4):16-20.
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Affiliation(s)
- A G Sinclair
- Pharmacy Department, University Hospitals Plymouth, Plymouth, UK
| | - J Ellick
- Pharmacy Department, University Hospitals Plymouth, Plymouth, UK
| | - M Kehoe
- Pharmacy Department, University Hospitals Plymouth, Plymouth, UK
| | - L Hall
- Pharmacy Department, University Hospitals Plymouth, Plymouth, UK
| | - J Lamb
- Pharmacy Department, University Hospitals Plymouth, Plymouth, UK
| | - A Norman
- Pharmacy Department, University Hospitals Plymouth, Plymouth, UK
| | - M D Jones
- Department of Pharmacy and Pharmacology, University of Bath, Bath, UK
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4
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Tian J, McGrogan A, Jones MD. Low carbon footprint inhalers in England: a review of dispensing data. International Journal of Pharmacy Practice 2022. [PMCID: PMC9383635 DOI: 10.1093/ijpp/riac019.053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Abstract
Introduction
Due to propellants, metered dose inhalers (pMDIs) have a higher carbon footprint than low carbon footprint inhalers (LCFIs), such as dry powder or soft mist inhalers (1). Consequently, pMDIs contribute 3.5% of the NHS’s CO2 equivalent emissions (2). Local and national guidelines (NICE, British Thoracic Society) have attempted to increase use of LCFIs, but their effects and factors influencing success are unknown.
Aim
To investigate temporal and geographical variation in LCFI dispensing in England over five years.
Methods
Clinical commissioning group (CCG) dispensed items (March 2016-February 2021) were obtained from openprescribing.net for five classes of inhaler where a choice between pMDIs and LCFIs is available: short-acting beta-agonists (SABAs), long-acting beta-agonists (LABAs), inhaled corticosteroids (ICS), ICS plus LABA inhalers (ICS/LABA) and ICS/LABA plus long-acting muscarinic antagonist inhalers (ICS/LABA/LAMA). CCG population age profiles were obtained from the Office for National Statistics. CCG emergency hospital admission and mortality rates were obtained from Public Health England. CCG formularies and guidelines were reviewed to identify where guidance is available to prescribers.
To control for total inhaler dispensing, the key measure used is the %LCFI: the number of LCFI items dispensed relative to the total number of pMDI and LCFI items. Multivariate regression models were used to investigate geographical variation.
Results
The total annual %LCFI increased from 19.5% to 26.3% over the study period. This was driven by the introduction of ICS/LABA/LAMA inhalers in 2018, as %LCFI decreased for SABA, ICS and ICS/LABA inhalers. %LCFI varied between classes. In the final year, it ranged from 6% for both SABA and ICS inhalers, to 41.2% and 43.9% for ICS/LABA and ICS/LABA/LAMA inhalers, respectively. Interestingly, the cost per item for ICS/LABA and ICS/LABA/LAMA inhalers was similar for both pMDIs and LCFIs, but for SABA and ICS inhalers LCFIs were more expensive.
%LCFI in the final year varied between CCGs (10.7% to 30.9%). The North West, and Birmingham and London areas had consistently higher %LCFI for all classes. For SABA and ICS inhalers, both the presence of advice on climate change in CCG guidelines or formularies, and greater CCG asthma prevalence, were significantly associated with higher %LCFI (p<0.05). The proportion of CCG population <15 years had a significant negative association with %LCFI for ICS and ICS/LABA inhalers (p<0.05). There were no clinically significant associations between %LCFI and either emergency hospital admission or mortality rates.
Conclusion
Current initiatives have not been successful in increasing the use of LCFIs, indicating limited implementation of guidelines for unknown reasons. Further action is required to reduce the carbon footprint of inhaler prescribing. Actions to address the financial disincentives to LCFI prescribing, CCG leadership (e.g. guidelines) and the appropriate use of LCFI in young people should be considered. Research into facilitators and barriers to LCFI use would support this. An important limitation is the use of dispensed items data rather than the number of inhalers, although there is no evidence that the number of inhalers per item varies between pMDIs and LCFIs. In addition, the Covid-19 pandemic disrupted prescribing patterns and long-term NHS projects.
References
(1) Wilkinson AJK, Braggins R, Steinbach I, Smith K. Costs of switching to low global warming potential inhalers. An economic and carbon footprint analysis of NHS prescription data in England. BMJ Open. 2019; 9:e028763.
(2) Environmental Audit Committee. UK progress on reducing F-Gas emissions inquiry: Fifth report of session 2017-19. London (UK): House of Commons Environmental Audit Committee; 25 April 2018. Available from https://publications.parliament.uk/pa/cm201719/cmselect/cmenvaud/469/469.pdf: [Accessed 27 September 2021].
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Affiliation(s)
- J Tian
- School of Chemistry, University of Bristol, Bristol, UK
| | - A McGrogan
- Department of Pharmacy and Pharmacology, University of Bath, Bath, UK
| | - M D Jones
- Department of Pharmacy and Pharmacology, University of Bath, Bath, UK
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5
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Berthelson PR, Ghassemi P, Wood JW, Stubblefield GG, Al-Graitti AJ, Jones MD, Horstemeyer MF, Chowdhury S, Prabhu RK. A finite element-guided mathematical surrogate modeling approach for assessing occupant injury trends across variations in simplified vehicular impact conditions. Med Biol Eng Comput 2021; 59:1065-1079. [PMID: 33881704 DOI: 10.1007/s11517-021-02349-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2020] [Accepted: 03/17/2021] [Indexed: 11/26/2022]
Abstract
A finite element (FE)-guided mathematical surrogate modeling methodology is presented for evaluating relative injury trends across varied vehicular impact conditions. The prevalence of crash-induced injuries necessitates the quantification of the human body's response to impacts. FE modeling is often used for crash analyses but requires time and computational cost. However, surrogate modeling can predict injury trends between the FE data, requiring fewer FE simulations to evaluate the complete testing range. To determine the viability of this methodology for injury assessment, crash-induced occupant head injury criterion (HIC15) trends were predicted from Kriging models across varied impact velocities (10-45 mph; 16.1-72.4 km/h), locations (near side, far side, front, and rear), and angles (-45 to 45°) and compared to previously published data. These response trends were analyzed to locate high-risk target regions. Impact velocity and location were the most influential factors, with HIC15 increasing alongside the velocity and proximity to the driver. The impact angle was dependent on the location and was minimally influential, often producing greater HIC15 under oblique angles. These model-based head injury trends were consistent with previously published data, demonstrating great promise for the proposed methodology, which provides effective and efficient quantification of human response across a wide variety of car crash scenarios, simultaneously. This study presents a finite element-guided mathematical surrogate modeling methodology to evaluate occupant injury response trends for a wide range of impact velocities (10-45 mph), locations, and angles (-45 to 45°). Head injury response trends were predicted and compared to previously published data to assess the efficacy of the methodology for assessing occupant response to variations in impact conditions. Velocity and location were the most influential factors on the head injury response, with the risk increasing alongside greater impact velocity and locational proximity to the driver. Additionally, the angle of impact variable was dependent on the location and, thus, had minimal independent influence on the head injury risk.
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Affiliation(s)
- P R Berthelson
- Center for Advanced Vehicular Systems, Mississippi State University, 200 Research Blvd, Starkville, MS, 39759, USA
- Department of Agricultural and Biological Engineering, Mississippi State University, Mississippi State, MS, 39762, USA
| | - P Ghassemi
- Department of Mechanical and Aerospace Engineering, University at Buffalo, 246 Bell Hall, Buffalo, NY, 14260, USA
| | - J W Wood
- Center for Advanced Vehicular Systems, Mississippi State University, 200 Research Blvd, Starkville, MS, 39759, USA
- Department of Agricultural and Biological Engineering, Mississippi State University, Mississippi State, MS, 39762, USA
| | - G G Stubblefield
- Center for Advanced Vehicular Systems, Mississippi State University, 200 Research Blvd, Starkville, MS, 39759, USA
- Department of Mechanical Engineering, Mississippi State University, Mississippi State, MS, 39762, USA
| | - A J Al-Graitti
- School of Engineering, Cardiff University, Cardiff, Wales, CF10 3AT, UK
| | - M D Jones
- School of Engineering, Cardiff University, Cardiff, Wales, CF10 3AT, UK
| | - M F Horstemeyer
- Center for Advanced Vehicular Systems, Mississippi State University, 200 Research Blvd, Starkville, MS, 39759, USA
- Department of Mechanical Engineering, Mississippi State University, Mississippi State, MS, 39762, USA
| | - S Chowdhury
- Department of Mechanical and Aerospace Engineering, University at Buffalo, 246 Bell Hall, Buffalo, NY, 14260, USA.
| | - R K Prabhu
- Center for Advanced Vehicular Systems, Mississippi State University, 200 Research Blvd, Starkville, MS, 39759, USA
- Department of Agricultural and Biological Engineering, Mississippi State University, Mississippi State, MS, 39762, USA
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6
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Crawford HL, Fallon P, Macchiavelli AO, Doornenbal P, Aoi N, Browne F, Campbell CM, Chen S, Clark RM, Cortés ML, Cromaz M, Ideguchi E, Jones MD, Kanungo R, MacCormick M, Momiyama S, Murray I, Niikura M, Paschalis S, Petri M, Sakurai H, Salathe M, Schrock P, Steppenbeck D, Takeuchi S, Tanaka YK, Taniuchi R, Wang H, Wimmer K. First Spectroscopy of the Near Drip-line Nucleus ^{40}Mg. Phys Rev Lett 2019; 122:052501. [PMID: 30822018 DOI: 10.1103/physrevlett.122.052501] [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] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Indexed: 06/09/2023]
Abstract
One of the most exotic light neutron-rich nuclei currently accessible for experimental study is ^{40}Mg, which lies at the intersection of the nucleon magic number N=28 and the neutron drip line. Low-lying excited states of ^{40}Mg have been studied for the first time following a one-proton removal reaction from ^{41}Al, performed at the Radioactive Isotope Beam Factory of RIKEN Nishina Center with the DALI2 γ-ray array and the ZeroDegree spectrometer. Two γ-ray transitions were observed, suggesting an excitation spectrum that shows unexpected properties as compared to both the systematics along the Z=12, N≥20 Mg isotopes and available state-of-the-art theoretical model predictions. A possible explanation for the observed structure involves weak-binding effects in the low-lying excitation spectrum.
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Affiliation(s)
- H L Crawford
- Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - P Fallon
- Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - A O Macchiavelli
- Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - P Doornenbal
- RIKEN Nishina Center, Wako, Saitama 351-0198, Japan
| | - N Aoi
- Research Center for Nuclear Physics (RCNP), Osaka University, Mihogakoa, Ibaraki, Osaka 567-0047, Japan
| | - F Browne
- RIKEN Nishina Center, Wako, Saitama 351-0198, Japan
| | - C M Campbell
- Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - S Chen
- RIKEN Nishina Center, Wako, Saitama 351-0198, Japan
| | - R M Clark
- Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - M L Cortés
- RIKEN Nishina Center, Wako, Saitama 351-0198, Japan
| | - M Cromaz
- Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - E Ideguchi
- Research Center for Nuclear Physics (RCNP), Osaka University, Mihogakoa, Ibaraki, Osaka 567-0047, Japan
| | - M D Jones
- Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - R Kanungo
- Astronomy and Physics Department, Saint Mary's University, Halifax, Nova Scotia B3H 3C3, Canada
- TRIUMF, Vancouver, British Columbia V6T 2A3, Canada
| | - M MacCormick
- Institut de Physique Nucléaire, IN2P3-CNRS, Université Paris-Sud, Université Paris-Saclay, Orsay Cedex 91406, France
| | - S Momiyama
- Department of Physics, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - I Murray
- Institut de Physique Nucléaire, IN2P3-CNRS, Université Paris-Sud, Université Paris-Saclay, Orsay Cedex 91406, France
| | - M Niikura
- Department of Physics, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - S Paschalis
- Department of Physics, University of York, Heslington, York, England YO10 5DD, United Kingdom
| | - M Petri
- Department of Physics, University of York, Heslington, York, England YO10 5DD, United Kingdom
| | - H Sakurai
- RIKEN Nishina Center, Wako, Saitama 351-0198, Japan
- Department of Physics, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - M Salathe
- Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - P Schrock
- Center for Nuclear Study, University of Tokyo, RIKEN Campus, Wako, Saitama 351-0198, Japan
| | - D Steppenbeck
- Center for Nuclear Study, University of Tokyo, RIKEN Campus, Wako, Saitama 351-0198, Japan
| | - S Takeuchi
- RIKEN Nishina Center, Wako, Saitama 351-0198, Japan
- Department of Physics, Tokyo Institute of Technology, Meguro, Tokyo 152-8551, Japan
| | - Y K Tanaka
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstrasse 1, 64291 Darmstadt, Germany
| | - R Taniuchi
- Department of Physics, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - H Wang
- RIKEN Nishina Center, Wako, Saitama 351-0198, Japan
| | - K Wimmer
- Department of Physics, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
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7
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Bernasconi-Elias P, Hu T, Jenkins D, Firestone B, Gans S, Kurth E, Capodieci P, Deplazes-Lauber J, Petropoulos K, Thiel P, Ponsel D, Hee Choi S, LeMotte P, London A, Goetcshkes M, Nolin E, Jones MD, Slocum K, Kluk MJ, Weinstock DM, Christodoulou A, Weinberg O, Jaehrling J, Ettenberg SA, Buckler A, Blacklow SC, Aster JC, Fryer CJ. Characterization of activating mutations of NOTCH3 in T-cell acute lymphoblastic leukemia and anti-leukemic activity of NOTCH3 inhibitory antibodies. Oncogene 2016; 35:6077-6086. [PMID: 27157619 PMCID: PMC5102827 DOI: 10.1038/onc.2016.133] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [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: 01/19/2016] [Accepted: 03/07/2016] [Indexed: 01/07/2023]
Abstract
Notch receptors have been implicated as oncogenic drivers in several cancers, the most notable example being NOTCH1 in T-cell acute lymphoblastic leukemia (T-ALL). To characterize the role of activated NOTCH3 in cancer, we generated an antibody that detects the neo-epitope created upon gamma-secretase cleavage of NOTCH3 to release its intracellular domain (ICD3), and sequenced the negative regulatory region (NRR) and PEST domain coding regions of NOTCH3 in a panel of cell lines. We also characterize NOTCH3 tumor-associated mutations that result in activation of signaling and report new inhibitory antibodies. We determined the structural basis for receptor inhibition by obtaining the first co-crystal structure of a NOTCH3 antibody with the NRR protein and defined two distinct epitopes for NRR antibodies. The antibodies exhibit potent anti-leukemic activity in cell lines and tumor xenografts harboring NOTCH3 activating mutations. Screening of primary T-ALL samples reveals that two of 40 tumors examined show active NOTCH3 signaling. We also identified evidence of NOTCH3 activation in 12 of 24 patient-derived orthotopic xenograft models, two of which exhibit activation of NOTCH3 without activation of NOTCH1. Our studies provide additional insights into NOTCH3 activation and offer a path forward for identification of cancers that are likely to respond to therapy with NOTCH3 selective inhibitory antibodies.
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Affiliation(s)
- P Bernasconi-Elias
- Developmental and Molecular Pathways, Novartis Institutes for Biomedical Research, Cambridge, MA, USA
| | - T Hu
- Center for Proteomic Chemistry, Novartis Institutes for Biomedical Research, Cambridge, MA, USA
| | - D Jenkins
- Department of Oncology, Novartis Institutes for Biomedical Research, Cambridge, MA, USA
| | - B Firestone
- Department of Oncology, Novartis Institutes for Biomedical Research, Cambridge, MA, USA
| | - S Gans
- Developmental and Molecular Pathways, Novartis Institutes for Biomedical Research, Cambridge, MA, USA
| | - E Kurth
- Department of Oncology, Novartis Institutes for Biomedical Research, Cambridge, MA, USA
| | - P Capodieci
- Developmental and Molecular Pathways, Novartis Institutes for Biomedical Research, Cambridge, MA, USA
| | - J Deplazes-Lauber
- Discovery Alliances and Technologies, MorphoSys AG, Martinsried, Germany
| | - K Petropoulos
- Discovery Alliances and Technologies, MorphoSys AG, Martinsried, Germany
| | - P Thiel
- Discovery Alliances and Technologies, MorphoSys AG, Martinsried, Germany
| | - D Ponsel
- Discovery Alliances and Technologies, MorphoSys AG, Martinsried, Germany
| | - S Hee Choi
- Department of Cancer Biology, Dana Farber Cancer Institute, Boston, MA, USA.,Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA, USA
| | - P LeMotte
- Department of Biologics, Novartis Institutes for Biomedical Research, Cambridge, MA, USA
| | - A London
- Department of Biologics, Novartis Institutes for Biomedical Research, Cambridge, MA, USA
| | - M Goetcshkes
- Developmental and Molecular Pathways, Novartis Institutes for Biomedical Research, Cambridge, MA, USA
| | - E Nolin
- Developmental and Molecular Pathways, Novartis Institutes for Biomedical Research, Cambridge, MA, USA
| | - M D Jones
- Department of Oncology, Novartis Institutes for Biomedical Research, Cambridge, MA, USA
| | - K Slocum
- Department of Oncology, Novartis Institutes for Biomedical Research, Cambridge, MA, USA
| | - M J Kluk
- Department of Pathology, Brigham and Women's Hospital, Boston, MA, USA
| | - D M Weinstock
- Department of Cancer Biology, Dana Farber Cancer Institute, Boston, MA, USA
| | - A Christodoulou
- Department of Cancer Biology, Dana Farber Cancer Institute, Boston, MA, USA
| | - O Weinberg
- Pathology Children Hospital Boston, Boston, MA, USA
| | - J Jaehrling
- Discovery Alliances and Technologies, MorphoSys AG, Martinsried, Germany
| | - S A Ettenberg
- Department of Oncology, Novartis Institutes for Biomedical Research, Cambridge, MA, USA
| | - A Buckler
- Developmental and Molecular Pathways, Novartis Institutes for Biomedical Research, Cambridge, MA, USA
| | - S C Blacklow
- Department of Cancer Biology, Dana Farber Cancer Institute, Boston, MA, USA.,Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA, USA.,Department of Pathology, Brigham and Women's Hospital, Boston, MA, USA
| | - J C Aster
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA, USA.,Department of Pathology, Brigham and Women's Hospital, Boston, MA, USA
| | - C J Fryer
- Developmental and Molecular Pathways, Novartis Institutes for Biomedical Research, Cambridge, MA, USA
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8
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Abstract
Nickel is an essential transition metal for the survival of Helicobacter pylori in the acidic human stomach. The nickel-responsive transcriptional regulator HpNikR is important for maintaining healthy cytosolic nickel concentrations through the regulation of multiple genes, but its complete regulon and role in nickel homeostasis are not well understood. To investigate potential gene targets of HpNikR, ChIP sequencing was performed using H. pylori grown at neutral pH in nickel-supplemented media and this experiment identified HPG27_866 (frpB2) and HPG27_1499 (ceuE). These two genes are annotated to encode a putative iron transporter and a nickel-binding, periplasmic component of an ABC transporter, respectively. In vitro DNA-binding assays revealed that HpNikR binds both gene promoter sequences in a nickel-responsive manner with affinities on the order of ∼10(-7) M. The recognition sites of HpNikR were identified and loosely correlate with the HpNikR pseudo-consensus sequence (TATTATT-N11-AATAATA). Quantitative PCR experiments revealed that HPG27_866 and HPG27_1499 are transcriptionally repressed following growth of H. pylori G27 in nickel-supplemented media, and that this response is dependent on HpNikR. In contrast, iron supplementation results in activation of HPG27_1499, but no impact on the expression of HPG27_866 was observed. Metal analysis of the Δ866 strain revealed that HPG27_866 has an impact on nickel accumulation. These studies demonstrate that HPG27_866 and HPG27_1499 are both direct targets of HpNikR and that HPG27_866 influences nickel uptake in H. pylori.
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Affiliation(s)
- M D Jones
- Department of Chemistry, University of Toronto, 80 St. George St., Toronto, ON, M5S 3H6, Canada.
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9
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McKeown P, Davidson MG, Lowe JP, Mahon MF, Thomas LH, Woodman TJ, Jones MD. Aminopiperidine based complexes for lactide polymerisation. Dalton Trans 2016; 45:5374-87. [DOI: 10.1039/c5dt04695e] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
A series of new ligands based on a 2-(aminomethyl)piperidine motif have been prepared. An interesting diversity in structure is observed, all complexes have been trialled for the polymerisation of rac-lactide.
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Affiliation(s)
- P. McKeown
- Doctoral Training Centre in Sustainable Chemical Technologies
- University of Bath
- Bath BA2 7AY
- UK
- Department of Chemistry
| | - M. G. Davidson
- Doctoral Training Centre in Sustainable Chemical Technologies
- University of Bath
- Bath BA2 7AY
- UK
- Department of Chemistry
| | - J. P. Lowe
- Department of Chemistry
- University of Bath
- Bath BA2 7AY
- UK
| | - M. F. Mahon
- Crystallography Centre
- Department of Chemistry
- University of Bath
- Bath BA2 7AY
- UK
| | - L. H. Thomas
- Department of Chemistry
- University of Bath
- Bath BA2 7AY
- UK
| | - T. J. Woodman
- Doctoral Training Centre in Sustainable Chemical Technologies
- University of Bath
- Bath BA2 7AY
- UK
| | - M. D. Jones
- Department of Chemistry
- University of Bath
- Bath BA2 7AY
- UK
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10
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Jones MD, Kohley Z, Baumann T, Christian G, DeYoung PA, Finck JE, Frank N, Haring-Kaye RA, Kuchera AN, Luther B, Mosby S, Smith JK, Snyder J, Spyrou A, Stephenson SL, Thoennessen M. Search for 4 ncontributions in the reaction 14Be(CH 2,X) 10He. EPJ Web of Conferences 2016. [DOI: 10.1051/epjconf/201611306006] [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: 11/14/2022] Open
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11
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Kranabetter JM, Hawkins BJ, Jones MD, Robbins S, Dyer T, Li T. Species turnover (β-diversity) in ectomycorrhizal fungi linked to NH4+ uptake capacity. Mol Ecol 2015; 24:5992-6005. [DOI: 10.1111/mec.13435] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Revised: 09/30/2015] [Accepted: 10/20/2015] [Indexed: 11/29/2022]
Affiliation(s)
- J. M. Kranabetter
- British Columbia Ministry of Forests, Lands and Natural Resource Operations; PO Box 9536 STN PROV GOVT Victoria British Columbia Canada V8W 9C4
| | - B. J. Hawkins
- Centre for Forest Biology; University of Victoria; PO Box 3020 STN CSC Victoria British Columbia Canada V8W 3N5
| | - M. D. Jones
- Biology Department; University of British Columbia; Okanagan Campus Sci-385 1177 Research Road Kelowna British Columbia Canada V4V 1V7
| | - S. Robbins
- Centre for Forest Biology; University of Victoria; PO Box 3020 STN CSC Victoria British Columbia Canada V8W 3N5
| | - T. Dyer
- Natural Resources Canada; Pacific Forestry Centre; 506 Burnside Road West Victoria British Columbia Canada V8Z 1M5
| | - T. Li
- Laboratory of Conservation and Utilization of Bio-resources; Yunnan University; 2# Cuihu Road North Kunming China
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12
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Perruchoud LH, Jones MD, Sutrisno A, Zamble DB, Simpson AJ, Zhang XA. A ratiometric NMR pH sensing strategy based on a slow-proton-exchange (SPE) mechanism. Chem Sci 2015; 6:6305-6311. [PMID: 30090248 PMCID: PMC6054103 DOI: 10.1039/c5sc02145f] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [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: 06/13/2015] [Accepted: 07/18/2015] [Indexed: 12/16/2022] Open
Abstract
Real time and non-invasive detection of pH in live biological systems is crucial for understanding the physiological role of acid-base homeostasis and for detecting pathological conditions associated with pH imbalance. One method to achieve in vivo pH monitoring is NMR. Conventional NMR methods, however, mainly utilize molecular sensors displaying pH-dependent chemical shift changes, which are vulnerable to multiple pH-independent factors. Here, we present a novel ratiometric strategy for sensitive and accurate pH sensing based on a small synthetic molecule, SPE1, which exhibits exceptionally slow proton exchange on the NMR time scale. Each protonation state of the sensor displays distinct NMR signals and the ratio of these signals affords precise pH values. In contrast to standard NMR methods, this ratiometric mechanism is not based on a chemical shift change, and SPE1 binds protons with high selectivity, resulting in accurate measurements. SPE1 was used to measure the pH in a single oocyte as well as in bacterial cultures, demonstrating the versatility of this method and establishing the foundation for broad biological applications.
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Affiliation(s)
- L H Perruchoud
- Department of Chemistry , University of Toronto , Toronto , ON M5S 3H6 , Canada . ; ;
- Department of Environmental and Physical Sciences , University of Toronto Scarborough , Toronto , ON M1C 1A4 , Canada
| | - M D Jones
- Department of Chemistry , University of Toronto , Toronto , ON M5S 3H6 , Canada . ; ;
| | - A Sutrisno
- Department of Chemistry , University of Toronto , Toronto , ON M5S 3H6 , Canada . ; ;
- Department of Environmental and Physical Sciences , University of Toronto Scarborough , Toronto , ON M1C 1A4 , Canada
| | - D B Zamble
- Department of Chemistry , University of Toronto , Toronto , ON M5S 3H6 , Canada . ; ;
- Department of Biochemistry , University of Toronto , Toronto , ON M5S 1A8 , Canada
| | - A J Simpson
- Department of Chemistry , University of Toronto , Toronto , ON M5S 3H6 , Canada . ; ;
- Department of Environmental and Physical Sciences , University of Toronto Scarborough , Toronto , ON M1C 1A4 , Canada
| | - X-A Zhang
- Department of Chemistry , University of Toronto , Toronto , ON M5S 3H6 , Canada . ; ;
- Department of Environmental and Physical Sciences , University of Toronto Scarborough , Toronto , ON M1C 1A4 , Canada
- Department of Biological Sciences , University of Toronto Scarborough , Toronto , ON M1C 1A4 , Canada
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13
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Scott-Moncrieff JC, Heng HG, Weng HY, Dimeo D, Jones MD. Effect of a Limited Iodine Diet on Iodine Uptake by Thyroid Glands in Hyperthyroid Cats. J Vet Intern Med 2015; 29:1322-6. [PMID: 26306818 PMCID: PMC4858048 DOI: 10.1111/jvim.13577] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Revised: 03/03/2015] [Accepted: 06/10/2015] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND The effect of feeding a limited iodine diet on radioactive iodine uptake in the thyroid glands of hyperthyroid cats is unknown. OBJECTIVES To determine how feeding limited dietary iodine affects radioactive iodine uptake by the thyroid glands of hyperthyroid cats. ANIMALS Eight geriatric cats with spontaneous hyperthyroidism. METHODS Prospective study of eight client owned hyperthyroid cats fed a commercially available iodine limited diet for 6 months. Clinical signs were evaluated and TT4 and fT4 were measured during consumption of the diet. Uptake of (123)I was determined before and 8-16 weeks after exclusive consumption of the diet. RESULTS Clinical signs of hyperthyroidism resolved in all cats, but there was no significant increase in body weight. TT4 and fT4 decreased into the reference range by 8-16 weeks in all cats. Mean TT4 before consumption of the diet was 9.7 μg/dL (SD 5.2) and after consumption of the diet was 3.1 μg/dL (SD 0.9). Scintigraphy revealed unilateral uptake of isotope in 5 cats and bilateral uptake in 3 cats. Mean percentage uptake of (123)I by the thyroid gland at 8 hours after isotope administration was 16.2 (SD 11.8) before diet consumption and 34.6 (SD 11.7) 8-16 weeks after exclusive consumption of the diet. The percentage increase was variable between cats (38-639%). CONCLUSIONS AND CLINICAL IMPORTANCE Limited iodine diets increase iodine uptake in the autonomous thyroid glands of hyperthyroid cats. Further studies are necessary to determine if consumption of a limited iodine diet changes sensitivity of the thyroid gland to (131)I treatment.
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Affiliation(s)
- J C Scott-Moncrieff
- Department of Veterinary Clinical Sciences, Purdue University College of Veterinary Medicine, West Lafayette, IN
| | - H G Heng
- Department of Veterinary Clinical Sciences, Purdue University College of Veterinary Medicine, West Lafayette, IN
| | - H Y Weng
- Department of Comparative Pathobiology, Purdue University College of Veterinary Medicine, West Lafayette, IN
| | - D Dimeo
- Department of Veterinary Clinical Sciences, Purdue University College of Veterinary Medicine, West Lafayette, IN
| | - M D Jones
- Department of Veterinary Clinical Sciences, Purdue University College of Veterinary Medicine, West Lafayette, IN
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Al-Kutubi H, Rassaei L, Olthuis W, Nelson GW, Foord JS, Holdway P, Carta M, Malpass-Evans R, McKeown NB, Tsang SC, Castaing R, Forder TR, Jones MD, He D, Marken F. Correction: Polymers of intrinsic microporosity as high temperature templates for the formation of nanofibrous oxides. RSC Adv 2015. [DOI: 10.1039/c5ra90086g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Correction for ‘Polymers of intrinsic microporosity as high temperature templates for the formation of nanofibrous oxides’ by H. Al Kutubi et al., RSC Adv., 2015, 5, 73323–73326.
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15
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Al Kutubi H, Rassaei L, Olthuis W, Nelson GW, Foord JS, Holdway P, Carta M, Malpass-Evans R, McKeown NB, Tsang SC, Castaing R, Forder TR, Jones MD, He D, Marken F. Polymers of intrinsic microporosity as high temperature templates for the formation of nanofibrous oxides. RSC Adv 2015. [DOI: 10.1039/c5ra15131g] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Highly rigid polymers of intrinsic microporosity (PIM) offer novel high temperature template materials for the formation of nano-structured metal oxides, here for nanostructured Pr6O11.
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16
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Paris-Mandoki A, Jones MD, Nute J, Wu J, Warriar S, Hackermüller L. Versatile cold atom source for multi-species experiments. Rev Sci Instrum 2014; 85:113103. [PMID: 25430094 DOI: 10.1063/1.4900577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We present a dual-species oven and Zeeman slower setup capable of producing slow, high-flux atomic beams for loading magneto-optical traps. Our compact and versatile system is based on electronic switching between different magnetic field profiles and is applicable to a wide range of multi-species experiments. We give details of the vacuum setup, coils, and simple electronic circuitry. In addition, we demonstrate the performance of our system by optimized, sequential loading of magneto-optical traps of lithium-6 and cesium-133.
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Affiliation(s)
- A Paris-Mandoki
- School of Physics and Astronomy, University of Nottingham, Nottingham, NG7 2RD, United Kingdom
| | - M D Jones
- School of Physics and Astronomy, University of Nottingham, Nottingham, NG7 2RD, United Kingdom
| | - J Nute
- School of Physics and Astronomy, University of Nottingham, Nottingham, NG7 2RD, United Kingdom
| | - J Wu
- School of Physics and Astronomy, University of Nottingham, Nottingham, NG7 2RD, United Kingdom
| | - S Warriar
- School of Physics and Astronomy, University of Nottingham, Nottingham, NG7 2RD, United Kingdom
| | - L Hackermüller
- School of Physics and Astronomy, University of Nottingham, Nottingham, NG7 2RD, United Kingdom
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17
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Williams JM, Theobald PS, Jones MD. Infant cervical range of motion in the sagittal plane. International Journal of Therapy and Rehabilitation 2014. [DOI: 10.12968/ijtr.2014.21.sup7.s6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Background: Data pertaining to infant sagittal cervical range of motion (CROM) is lacking. Previous studies have either quantified motions other than sagittal or quantified sagittal range of motion in children >3 years old. Data capture in infants is complex and novel methods are required to overcome previous limitations. Such data is invaluable to inform paediatric injury models, such as those for shaken baby syndrome and automotive safety. Methods: Nine infants were recruited from a local group of parents (mean age=406 days, SD=19). Sagittal range-of-motion was measured using two miniature accelerometers (THETAmetrix), which provide orientation angle with respect to gravity. One sensor was placed on the forehead and one over the T2–3 spinous process. Sagittal range of motion was determined by subtracting the tilt angle of thorax sensor from that of the forehead and then summing the total sagittal movement cycle to yield resultant cervical range of motion. Infants were placed in their usual highchair and encouraged to move their head into flexion and extension by a parent focussing their attention on a favourite toy. At the point of maximal motion, the lead researcher applied gentle overpressure to ensure full range was achieved with parental consent. Once one full cycle of sagittal motion was achieved, data collection was terminated. Results: Overpressure was not possible in two infants, therefore, their data was omitted. The mean peak sagittal range of motion was 115° (SD=12) with a 95% CI=106–124°. Conclusions: The described methods were successful in measuring sagittal CROM in infants and could be used to determine range of motion in even younger infants. The data produced is in agreement with previous reports on older children; however, this method overcomes limitations of other data capture methods. Implications: The results provide the first estimate of infant CROM. These data can serve as reference for models of musculoskeletal and neurological injury, including those for shaken baby syndrome and automotive safety.
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Affiliation(s)
- JM Williams
- School of Health and Social Care, Bournemouth University
| | - PS Theobald
- School of Health and Social Care, Bournemouth University
| | - MD Jones
- School of Health and Social Care, Bournemouth University
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18
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Alqhtani RS, Williams JM, Jones MD, Theobald PS. Hip and lumbar motion: Is there a correlation between flexion and functional tasks? International Journal of Therapy and Rehabilitation 2014. [DOI: 10.12968/ijtr.2014.21.sup7.s7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- RS Alqhtani
- School of Health and Social Care, Bournemouth University
| | - JM Williams
- School of Health and Social Care, Bournemouth University
| | - MD Jones
- School of Health and Social Care, Bournemouth University
| | - PS Theobald
- School of Health and Social Care, Bournemouth University
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19
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Alqhtani RS, Jones MD, Theobald PS, Williams JM. The reliability of novel multiregional spinal motion measurement device. International Journal of Therapy and Rehabilitation 2014. [DOI: 10.12968/ijtr.2014.21.sup7.s6a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Background: Current spinal range of motion (ROM) measurement methods have limitations ranging from the amount of detail obtained to environmental costs and complexity. In particular, limited regional spinal motion is obtained using the current methods. However, a new portable ‘string’ of accelerometers is proposed to overcome these limitations. Objectives: This study seeks to determine the reliability of this sensor string in measuring three-dimensional spinal ROM and to investigate the relative motions across six different regions. Methods: Two procedures were undertaken on 18 healthy participants. Protocol one: two sensors were placed on the forehead and T1 to measure cervical ROM; and protocol two: six sensors were placed on the spinous processes of T1, T4, T8, T12, L3 and S1 to measure thoraco-lumbar regional ROM. Results: The ICC values for all regions were found to be high, ranging from ICC=0.88–0.99 for all movements and regions of the spine, demonstrating that the proposed methods were highly reliable for repeated measures. The standard error of the means (SEMs) were small, ranging from 0.7–5.2°. The flexion/extension motion demonstrated a mean SEM of 1.9° and 1.1° for lateral bending motions. Slightly larger SEMs were observed for rotation, especially for the upper thoracic (UT) and mid thoracic (MT) region with an overall mean SEM of 3.1°. Minimum detectable change (MDC) values ranged from 1.9–14.4°. The flexion/extension motion demonstrated a mean MDC of 5.2° with 3.1° for lateral bending motions. Slightly larger MDCs were observed for rotation (mean MDC=8.4°), especially for the UT and MT region. Implications: This method was able to quantify the relative contribution of differing regions to the overall motion. The method described represents a reliable method of assessing spinal ROM across multiple spinal regions.
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Affiliation(s)
- RS Alqhtani
- Institute of Medical Engineering and Medical Physics, Cardiff School of Engineering, Cardiff University
| | - MD Jones
- Institute of Medical Engineering and Medical Physics, Cardiff School of Engineering, Cardiff University
| | - PS Theobald
- Institute of Medical Engineering and Medical Physics, Cardiff School of Engineering, Cardiff University
| | - JM Williams
- Institute of Medical Engineering and Medical Physics, Cardiff School of Engineering, Cardiff University
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20
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Govani FS, Giess A, Mollet IG, Begbie ME, Jones MD, Game L, Shovlin CL. Directional next-generation RNA sequencing and examination of premature termination codon mutations in endoglin/hereditary haemorrhagic telangiectasia. Mol Syndromol 2013; 4:184-96. [PMID: 23801935 DOI: 10.1159/000350208] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/17/2012] [Indexed: 01/12/2023] Open
Abstract
Hereditary haemorrhagic telangiectasia (HHT) is a disease characterised by abnormal vascular structures, and most commonly caused by mutations in ENG, ACVRL1 or SMAD4 encoding endothelial cell-expressed proteins involved in TGF-β superfamily signalling. The majority of mutations reported on the HHT mutation database are predicted to lead to stop codons, either due to frameshifts or direct nonsense substitutions. The proportion is higher for ENG (67%) and SMAD4 (65%) than for ACVRL1 (42%), p < 0.0001. Here, by focussing on ENG, we report why conventional views of these mutations may need to be revised. Of the 111 stop codon-generating ENG mutations, on ExPASy translation, all except one were premature termination codons (PTCs), sited at least 50-55 bp upstream of the final exon-exon boundary of the main endoglin isoform, L-endoglin. This strongly suggests that the mutated RNA species will undergo nonsense-mediated decay. We provide new in vitro expression data to support dominant negative activity of stable truncated endoglin proteins but suggest these will not generate HHT: the single natural stop codon mutation in L-endoglin (sited within 50-55 nucleotides of the final exon-exon boundary) is unlikely to generate functional protein since it replaces the entire transmembrane domain, as would 8 further natural stop codon mutations, if the minor S-endoglin isoform were implicated in HHT pathogenesis. Finally, next-generation RNA sequencing data of 7 different RNA libraries from primary human endothelial cells demonstrate that multiple intronic regions of ENG are transcribed. The potential consequences of heterozygous deletions or duplications of such regions are discussed. These data support the haploinsufficiency model for HHT pathogenesis, explain why final exon mutations have not been detected to date in HHT, emphasise the potential need for functional examination of non-PTC-generating mutations, and lead to proposals for an alternate stratification system of mutational types for HHT genotype-phenotype correlations.
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Affiliation(s)
- F S Govani
- NHLI Cardiovascular Sciences, Hammersmith Campus, Imperial College London, London, UK
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21
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Stefanescu ER, Bursik M, Cordoba G, Dalbey K, Jones MD, Patra AK, Pieri DC, Pitman EB, Sheridan MF. Digital elevation model uncertainty and hazard analysis using a geophysical flow model. Proc Math Phys Eng Sci 2012. [DOI: 10.1098/rspa.2011.0711] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
This paper describes a new methodology to quantify the variation in the output of a computational fluid dynamics model for block and ash flows, when the digital elevation model (DEM) of the terrain and other inputs are given as a range of possible values with a prescribed uncertainty. Integrating these variations in the possible flows as a function of input uncertainties provides well-defined hazard probabilities at specific locations, i.e. a hazard map. Earlier work provided a methodology for assessing hazards based on variations in flow initiation and friction parameters. This paper extends this approach to include the effect of terrain error and uncertainty. The results are based on potential flows at Mammoth Mountain, CA, and Galeras Volcano, Colombia. The analysis establishes the soundness of the approach and the effect of including the uncertainty in DEMs in the construction of probabilistic hazard maps.
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Affiliation(s)
- E. R. Stefanescu
- Department of Mechanical and Aerospace Engineering, University at Buffalo, Buffalo, NY 14260, USA
| | - M. Bursik
- Department of Geology, University at Buffalo, Buffalo, NY 14260, USA
| | - G. Cordoba
- Department of Civil Engineering, Universidad de Nariño, Narino, Colombia
| | - K. Dalbey
- Sandia National Laboratories, Albuquerque, NM, USA
| | - M. D. Jones
- Center for Computational Research, University at Buffalo, Buffalo, NY 14260, USA
| | - A. K. Patra
- Department of Mechanical and Aerospace Engineering, University at Buffalo, Buffalo, NY 14260, USA
| | - D. C. Pieri
- Jet Propulsion Laboratory, Caltech, Pasadena, CA 91109, USA
| | - E. B. Pitman
- Department of Mechanical and Aerospace Engineering, University at Buffalo, Buffalo, NY 14260, USA
| | - M. F. Sheridan
- Department of Geology, University at Buffalo, Buffalo, NY 14260, USA
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22
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Humphris JL, Chang DK, Johns AL, Scarlett CJ, Pajic M, Jones MD, Colvin EK, Nagrial A, Chin VT, Chantrill LA, Samra JS, Gill AJ, Kench JG, Merrett ND, Das A, Musgrove EA, Sutherland RL, Biankin AV. The prognostic and predictive value of serum CA19.9 in pancreatic cancer. Ann Oncol 2012; 23:1713-22. [PMID: 22241899 PMCID: PMC3387824 DOI: 10.1093/annonc/mdr561] [Citation(s) in RCA: 194] [Impact Index Per Article: 16.2] [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] [Indexed: 12/12/2022] Open
Abstract
Background Current staging methods for pancreatic cancer (PC) are inadequate, and biomarkers to
aid clinical decision making are lacking. Despite the availability of the serum marker
carbohydrate antigen 19.9 (CA19.9) for over two decades, its precise role in the
management of PC is yet to be defined, and as a consequence, it is not widely used. Methods We assessed the relationship between perioperative serum CA19.9 levels, survival and
adjuvant chemotherapeutic responsiveness in a cohort of 260 patients who underwent
operative resection for PC. Results By specifically assessing the subgroup of patients with detectable CA19.9, we
identified potential utility at key clinical decision points. Low postoperative CA19.9
at 3 months (median survival 25.6 vs 14.8 months,
P = 0.0052) and before adjuvant chemotherapy were
independent prognostic factors. Patients with postoperative CA 19.9 levels >90 U/ml
did not benefit from adjuvant chemotherapy
(P = 0.7194) compared with those with a CA19.9 of
≤90 U/ml (median 26.0 vs 16.7 months, P = 0.0108).
Normalization of CA19.9 within 6 months of resection was also an independent favorable
prognostic factor (median 29.9 vs 14.8 months,
P = 0.0004) and normal perioperative CA19.9 levels
identified a good prognostic group, which was associated with a 5-year survival of
42%. Conclusions Perioperative serum CA19.9 measurements are informative in patients with detectable
CA19.9 (defined by serum levels of >5 U/ml) and have potential clinical utility in
predicting outcome and response to adjuvant chemotherapy. Future clinical trials should
prioritize incorporation of CA19.9 measurement at key decision points to prospectively
validate these findings and facilitate implementation.
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Affiliation(s)
- J L Humphris
- Cancer Research Program, Garvan Institute of Medical Research, Darlinghurst, Australia
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Abstract
When considering cases of infant head injury as a result of a short fall, investigators often have to base their opinions on the potential severity of a head injury on a scene description and/or photographic evidence of the potential impact surfaces. While variation in the attenuation properties of typical domestic surfaces and underlying support structures have been reported in the literature, this study investigates whether there is a need to consider the nature and composition of specific potential impact floor surfaces/sites, within a scene, prior to providing an opinion about the likely head impact injury outcome. An instrumented headform was impacted within a suspected crime scene to determine whether different potential impact sites posed different risks of producing head injury. The impact acceleration-time waveform, for the headform, was shown to vary considerably across the floor. By applying recognized head impact injury risk measures (peak g and head injury criterion), it was illustrated that the risk of an infant sustaining a significant head injury could vary considerably, depending upon the exact point of impact with the floor. This study highlights the potential for variation in impact force across a scene and illustrates the need to consider surface composition at specific sites across the entire potential impact area, since the risk of head injury can vary significantly. Caution should therefore be exercised when expressing opinions based solely on verbal, written or photographic evidence of head impact surfaces, without due consideration of the specific area onto which a head might have impacted.
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Affiliation(s)
- M D Jones
- Institute of Medical Engineering and Medical Physics, Cardiff University, The Parade, Cardiff, Wales, UK.
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Jones MD, Hunter RP, Dobson DP, Reymond N, Strehlau GA, Kubacki P, Tranchard ESN, Walters ME. European field study of the efficacy and safety of the novel anthelmintic monepantel in sheep. Vet Rec 2011; 167:610-3. [PMID: 21257441 DOI: 10.1136/vr.c4477] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
During 2007, a large-scale controlled, multicentre, blinded and randomised field study was conducted in Scotland, England and France to assess the efficacy and safety of monepantel, the first molecule to be developed from the recently discovered amino-acetonitrile derivatives class of anthelmintics, in sheep. Monepantel was administered orally, at a minimum dose of 2.5 mg/kg bodyweight, for the control of gastrointestinal nematodes in sheep maintained at pasture in a range of commercial production systems. Efficacy was measured by faecal egg count (FEC) reduction tests seven days after treatment and was demonstrated to be over 98 per cent against mixed-genus infections. The reduction in FEC of monepantel-treated sheep was statistically significantly greater than in untreated control sheep (P<0.0001). The efficacy of monepantel against mixed-genus natural field infections of the major gastrointestinal nematodes was in agreement with similar studies conducted in Australia and New Zealand. There were no treatment-related adverse events during the study, which included the use of a range of concomitant treatments.
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Affiliation(s)
- M D Jones
- Novartis Animal Health, Frimley Business Park, Frimley, Camberley, Surrey GU16 7SR.
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Thomas JMC, Beevers D, Dowson D, Jones MD, King P, Theobald PS. The Bio-Tribological Characteristics of Synthetic Tissue Grafts. Proc Inst Mech Eng H 2010; 225:141-8. [DOI: 10.1243/09544119jeim796] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The use of synthetic connective tissue grafts became popular in the mid-1980s, particularly for anterior cruciate ligament reconstruction; however, this trend was soon changed given the high failure rate due to abrasive wear. More than 20 years later, a vast range of grafts are available to the orthopaedic surgeon for augmenting connective tissue following rupture or tissue loss. While the biomechanical properties of these synthetic grafts become ever closer to the natural tissue, there have been no reports of their bio-tribological (i.e. bio-friction) characteristics. In this study, the bio-tribological performance of three clinically available synthetic tissue grafts, and natural tendon, was investigated. It was established that the natural tissue exhibits fluid-film lubrication characteristics and hence is highly efficient when sliding against opposing tissues. Conversely, all the synthetic tissues demonstrated boundary or mixed lubrication regimes, resulting in surface—surface contact, which will subsequently cause third body wear. The tribological performance of the synthetic tissue, however, appeared to be dependent on the macroscopic structure. This study indicates that there is a need for synthetic tissue designs to have improved frictional characteristics or to use a scaffold structure that encourages tissue in-growth. Such a development would optimize the bio-tribological properties of the synthetic tissue and thereby maximize longevity.
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Affiliation(s)
- J M C Thomas
- Department of Trauma and Orthopaedics, The Royal London Hospital, Whitechapel, London, UK
| | - D Beevers
- Xiros, Springfield House, Whitehouse Lane, Leeds, UK
| | - D Dowson
- Trauma Biomechanics Research Group, Institute of Medical Engineering and Medical Physics, Cardiff University, Cardiff, UK
| | - M D Jones
- Trauma Biomechanics Research Group, Institute of Medical Engineering and Medical Physics, Cardiff University, Cardiff, UK
| | - P King
- Trauma Biomechanics Research Group, Institute of Medical Engineering and Medical Physics, Cardiff University, Cardiff, UK
| | - P S Theobald
- Trauma Biomechanics Research Group, Institute of Medical Engineering and Medical Physics, Cardiff University, Cardiff, UK
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Zhu JX, Yu R, Wang H, Zhao LL, Jones MD, Dai J, Abrahams E, Morosan E, Fang M, Si Q. Band narrowing and Mott localization in iron oxychalcogenides La2O2Fe2O(Se,S)2. Phys Rev Lett 2010; 104:216405. [PMID: 20867124 DOI: 10.1103/physrevlett.104.216405] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2009] [Indexed: 05/05/2023]
Abstract
Bad metal properties have motivated a description of the parent iron pnictides as correlated metals on the verge of Mott localization. What has been unclear is whether interactions can push these and related compounds to the Mott-insulating side of the phase diagram. Here we consider the iron oxychalcogenides La2O2Fe2O(Se,S)2, which contain an Fe square lattice with an expanded unit cell. We show theoretically that they contain enhanced correlation effects through band narrowing compared to LaOFeAs, and we provide experimental evidence that they are Mott insulators with moderate charge gaps. We also discuss the magnetic properties in terms of a Heisenberg model with frustrating J1-J2-J2' exchange interactions on a "doubled" checkerboard lattice.
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Affiliation(s)
- Jian-Xin Zhu
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
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27
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Bakhtiari M, Malhotra H, Jones MD, Chaudhary V, Walters JP, Nazareth D. Applying graphics processor units to Monte Carlo dose calculation in radiation therapy. J Med Phys 2010; 35:120-2. [PMID: 20589122 PMCID: PMC2884304 DOI: 10.4103/0971-6203.62198] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2009] [Revised: 11/03/2009] [Accepted: 11/14/2009] [Indexed: 11/05/2022] Open
Abstract
We investigate the potential in using of using a graphics processor unit (GPU) for Monte-Carlo (MC)-based radiation dose calculations. The percent depth dose (PDD) of photons in a medium with known absorption and scattering coefficients is computed using a MC simulation running on both a standard CPU and a GPU. We demonstrate that the GPU's capability for massive parallel processing provides a significant acceleration in the MC calculation, and offers a significant advantage for distributed stochastic simulations on a single computer. Harnessing this potential of GPUs will help in the early adoption of MC for routine planning in a clinical environment.
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Affiliation(s)
- M. Bakhtiari
- Department of Radiation Medicine, Roswell Park Cancer Institute, Buffalo, NY 14263, USA
| | - H. Malhotra
- Department of Radiation Medicine, Roswell Park Cancer Institute, Buffalo, NY 14263, USA
| | - M. D. Jones
- Department of Physics and Center for Computational Research, University at Buffalo, SUNY, Buffalo, NY 14260, USA
| | - V. Chaudhary
- Computer Science and Engineering, University at Buffalo, SUNY, Buffalo, NY 14260, USA
| | - J. P. Walters
- Computer Science and Engineering, University at Buffalo, SUNY, Buffalo, NY 14260, USA
| | - D. Nazareth
- Department of Radiation Medicine, Roswell Park Cancer Institute, Buffalo, NY 14263, USA
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28
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Theobald P, O'Doherty DM, Holt CA, Evans SL, Jones MD. Medical engineering at Cardiff University. Part 2: Postgraduate programmes of study. Proc Inst Mech Eng H 2009; 223:431-5. [PMID: 19499832 DOI: 10.1243/09544119jeim534] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The Medical Engineering team within the School of Engineering, Cardiff University, delivers two postgraduate programmes of study. Established over 10 years ago, the part-time MSc programmes in Orthopaedic Engineering and Clinical Engineering offer the opportunity of further study while remaining within full-time employment. Both programmes deliver 120 taught credits over two academic years via a series of residential weekends, with successful completion enabling the student to undertake and then defend a 60-credit research dissertation. Fulfilling a specific role on the career pathway for both student cohorts, the strength of each programme is indicated by the consistent number of applicants.
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Affiliation(s)
- P Theobald
- Institute of Medical Engineering and Medical Physics, Cardiff University, Cardiff, UK
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Theobald P, Jones MD, Holt CA, Evans SL, O'Doherty DM. Medical engineering at Cardiff University. Part 1: Undergraduate programmes of study. Proc Inst Mech Eng H 2009; 223:425-30. [PMID: 19499831 DOI: 10.1243/09544119jeim533] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Cardiff University has offered a medical engineering undergraduate programme since 2001 and hence delivers one of the longest-running and most established medical engineering programmes within the UK. It currently offers BEng (Hons) and MEng (Hons) programmes that are both accredited by the Institution of Mechanical Engineers and include the option to undertake a year in industrial employment. The admissions policy ensures that the intake consists of a diverse range of students and is typically very successful in attracting female students. The programmes consist of six key academic threads which ensure that the content is both relevant and continuous, with all threads tailored to provide a patient-focused learning environment. Students initially learn core and fundamental principles in years 1 and 2, supported by a range of laboratories and practical experimentation. The latter years then encourage the students to corroborate and apply this knowledge, including involvement in a range of project-based learning exercises. The programme is delivered by a core of experienced academic medical engineers, with support from other engineering colleagues, as well as colleagues from the School of Biosciences, the School of Medicine, and the National Health Service. Thus, the programme delivers a wide range of modules which guarantee that graduating students have a thorough understanding of all possible career options. These two factors are significant in making it possible for students to follow their chosen career path upon graduation.
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Affiliation(s)
- P Theobald
- Institute of Medical Engineering and Medical Physics, Cardiff University, Queen's Building, The Parade, Cardiff CF24 3AA, UK
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Tang P, Chan HK, Chiou H, Ogawa K, Jones MD, Adi H, Buckton G, Prud'homme RK, Raper JA. Characterisation and aerosolisation of mannitol particles produced via confined liquid impinging jets. Int J Pharm 2008; 367:51-7. [PMID: 18848874 DOI: 10.1016/j.ijpharm.2008.09.024] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2008] [Revised: 09/12/2008] [Accepted: 09/12/2008] [Indexed: 10/21/2022]
Abstract
Mannitol particles, produced by spray drying (SD), have been used commercially (Aridol) in bronchial provocation test. In this study, we propose an alternative method to produce inhalable mannitol powders. The elongated mannitol particles (number median length 4.0microm, and axial ratio of 3.5) were prepared using a confined liquid impinging jets (CLIJs) followed by jet milling (JM). Spray dried and jet milled raw mannitol particles were compared in an attempt to assess the performance of the particles produced by the new method. Aerosol performance of the three different powders (CLIJ, SD, and JM) was relatively poor (fine particle fraction or FPF(loaded) below 15%) when dispersed by the Rotahaler. Dispersion through the Aeroliser led to better aerosol performance of the CLIJ mannitol (FPF(loaded) 20.3%), which is worse than the JM (FPF(loaded) 30.3%) and SD mannitol particles (FPF(loaded) 45.7%) at 60 L/min, but comparable (FPF(loaded) 40.0%) with those of the JM (FPF(loaded) 40.7%) and SD (FPF(loaded) 45.5%) powders at 100L/min. Hence, the optimum use of these elongated mannitol particles can be achieved at increased air flow with a more efficient inhaler. In addition to crystallinity, morphology, and particle size distribution, the surface energies of these powders were measured to explain the differences in aerosol performance. A major advantage of using the CLIJ method is that it can be scaled up with a good yield as the precipitate can be largely collected and recovered on a filter, compared with spray drying which has a low collection efficiency for fine particles below 2microm.
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Affiliation(s)
- P Tang
- Advanced Drug Delivery Group, Faculty of Pharmacy, The University of Sydney, New South Wales 2006, Australia.
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31
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Abstract
In the absence of a history of a significant accidental event, the most likely diagnosis in an infant with rib fractures is non-accidental injury. Medical opinion is essential when deciding if child abuse has taken place or not and this requires a consideration of whether a proposed causal explanation fits with the observed injuries. To assist in the interpretation of injuries and inform medical practitioners, it is essential to develop a clear understanding of their biomechanical mechanism of causation. The types and 'likely' mechanisms of rib fracture are well-documented, however, what forces, deflections and loading rates are required to produce particular fractures are relatively unknown. This paper presents a review of the literature, from a biomechanical engineering perspective, to assess information regarding the various types of rib fracture and their likely mechanisms, paying particular attention to the likely forces, deflections and loading rates involved. The biomechanical parameters, applied during 'two finger' infant cardiopulmonary resuscitation (CPR), are identified and discussed, and are currently believed to be below the limit at which rib fracture may occur. However, a new 'two thumb' CPR technique is identified which involves a holding/gripping mechanism of the infant thorax, similar to that which is believed to occur in inflicted injury scenarios, such as shaking. The two thumb method may provide a greater magnitude of force and deflection, a greater rate of loading and may perhaps pose a greater risk of fracture, compared with the 'two finger' supine, anterior-posterior chest compression approach. It is proposed to introduce a force/deflection boundary condition into mechanical and computer/numeric infant models. Subject to the future inclusion of loading rate/response data, a three-dimensional (force/deflection/loading rate) boundary condition will be used to provide a minimum injury threshold for potentially injurious scenarios. A number of further studies are suggested, since this paper is intended to provide a first step to developing a more sophisticated understanding of the causes of infant rib fracture. Areas of further study include specific rib fracture mechanisms, as well as the effects of age dependent characteristics, positioning and area of force application. Such additional information would allow the proposed initial boundary condition to be further refined to provide an indication of the likelihood, type and number of fractures that might be expected.
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Affiliation(s)
- M J Worn
- Institute of Medical Engineering and Medical Physics, Cardiff School of Engineering, Cardiff University, PO Box 685, The Parade, Cardiff, CF24 3TA, Wales, UK
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32
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Abstract
An adult male was found below a third floor balcony having sustained fatal head injuries. An account provided by a witness described how the deceased had been in high spirits and had engaged in swinging from the third floor balcony rail in an attempt to swing onto a lower second floor balcony and whilst doing so had lost his grip and fallen (10.67 metres) to the ground below. A conflicting account was provided, some weeks later, by a second witness, who claimed to have observed an argument between two men on a third floor balcony, during which one had vigorously pushed the other over the balcony rail. The push, it was alleged, caused the man to move very quickly over the balcony rail and fall in an 'upturned crucifix' position to the ground. This paper describes a series of biomechanical experiments, conducted on a reconstruction of the third floor balcony and the second floor balcony rail, during which a volunteer was subjected to the two fall scenarios, in an attempt to resolve the conflicting witness accounts. Analysis of human movement was performed using a 3-D motion analysis system, markers were placed at the volunteer's key joint centres and were tracked to determine physical parameters. The parameter values were used to calculate what dynamic movements may have occurred had the volunteer been allowed to fall, not just a distance equivalent to the lower balcony rail but a greater distance, equivalent to that between the balcony and the ground. Calculations indicate that during the hanging-fall scenario a range of body rotation was produced between 159 degrees and 249 degrees, that is, an upturned head-first body orientation, consistent with that required to produce the described injuries and consistent with the description provided by the first witness. The push-fall scenario, however, produced a greater estimated body rotation of between 329 degrees and 530 degrees, equal to the body rotating, from the point of free-fall to the moment of impact, between almost 1 and 1.5 times. This was consistent with the described injuries but inconsistent with the description provided by the second witness. It was therefore concluded that although both the accidental and inflicted-push scenarios could produce a body orientation consistent with the reported injuries, only the accidental scenario produced a fall which could be described as an 'upturned crucifix', since the push scenario produced a significantly greater body rotation. The witness who alleged that the deceased had been pushed later retracted his statement.
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Affiliation(s)
- M D Jones
- Institute of Medical Engineering and Medical Physics, Cardiff School of Engineering, Cardiff University, P.O. Box 685, The Parade, Cardiff CF24 3TA, Wales, UK.
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33
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Cory CZ, Jones MD. Development of a simulation system for performing in situ surface tests to assess the potential severity of head impacts from alleged childhood short falls. Forensic Sci Int 2006; 163:102-14. [PMID: 16413719 DOI: 10.1016/j.forsciint.2005.11.014] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2004] [Accepted: 11/08/2005] [Indexed: 11/15/2022]
Abstract
There is considerable debate in the medical literature surrounding the issue of fatal child head injuries being caused by short falls. When reviewing a case history a medical expert will form an opinion of the likely cause of an injury based on his/her knowledge of the literature, training and experience of similar cases. The severity of an injury is determined by the age of the victim, fall height, body impact site and the impact surface. A medical expert, when forming an opinion, is invariably assisted by a description of the scene or scene photographs and assumes the mechanical response of the floor conforms in the same way to "similar" surfaces. The impact response characteristics of the entire surface mixture is critically important when considering the potential for head injury to a child due to a short fall. However, at present during an investigation, the response of a surface to a head impact remains an unknown, since a simple description of, or cursory glance at, a floor surface is insufficient in determining its potential to cause injury. This paper documents the development of a simulation system for assessing the impact response, and potential to cause injury, of domestic floor surfaces during short falls. The method utilises a headform and drop tower adapted from techniques and current standards used to assess the potential for childhood head injuries of playground surfaces and pedestrian-bonnet impacts. The results suggest that the potential of a surface to cause head injury is dependent on the entire surface mixture, including the top surface layer (e.g. carpet and underlay), the underlying surface (wood, chipboard or concrete) and the support material (joists, supports. etc.). The results illustrate a wide range of injury potential between surface mixtures. The simulation system shows the potential to discriminate between differences in surface mixture. In conclusion, the authors suggest that in future investigations, the response of the entire surface mixture be taken into account when forming an opinion on the injury potential of short falls.
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Affiliation(s)
- C Z Cory
- Institute of Medical Engineering and Medical Physics, Cardiff School of Engineering, Cardiff University, Cardiff CF24 OYF, Wales, UK.
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34
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Grenon F, Bradley RL, Jones MD, Shipley B, Peat H. Soil factors controlling mineral N uptake by Picea engelmannii seedlings: the importance of gross NH4+ production rates. New Phytol 2005; 165:791-799. [PMID: 15720690 DOI: 10.1111/j.1469-8137.2004.01289.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
* Hydroponic studies suggest that plant nitrogen (N) demand determines the rate of mineral N uptake; however, field observations show N limitation to be widespread. Field experiments are needed to understand soil factors controlling mineral N uptake. * We planted Picea engelmannii seedlings that had initially been grown from sterilized seeds, on a recently clearcut site. We applied a hybrid isotope dilution/pulse labelling technique to compare the gross production rate, concomitantly to the plant uptake rate, of soil mineral N. We also measured mineral N concentrations, microbial N, and percent ectomycorrhizal root tips. * Gross NH4+ production rate was the most important determinant of plant uptake rate. Exploratory path analysis suggested that plant uptake was also determined by microbial N, which was, in turn, determined by soil mineral N concentrations. Percent ectomycorrhizal root tips was negatively related to gross NO3- production rate and microbial N concentrations. * We conclude that nutrient flux density is important in controlling plant uptake. Mycorrhizal colonization may alter N dynamics in the rhizosphere without affecting mineral N uptake by seedlings.
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Affiliation(s)
- F Grenon
- Département de Biologie, Université de Sherbrooke, Sherbrooke, Québec, J1K 2R1, Canada
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35
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Kolek OI, Hines ER, Jones MD, LeSueur L, Kiela PR, Haussler MR, Ghishan FK. 326 1α,25-DIHYDROXYVITAMIN D3 UP-REGULATES FIBROBLAST GROWTH FACTOR 23 GENE EXPRESSION IN A RAT OSTEOBLASTIC CELL LINE AND MOUSE CALVARIA. J Investig Med 2005. [DOI: 10.2310/6650.2005.00005.325] [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: 11/18/2022]
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Abstract
We propose a new pseudophase crystal structure, based on an orthorhombic distortion of the diamond structure, for the ground-state alpha phase of plutonium. Electronic-structure calculations in the generalized-gradient approximation give approximately the same total energy for the two structures. Interestingly, our new pseudophase structure is the same as the gamma-Pu structure except with very different b/a and c/a ratios. We show how the contraction relative to the gamma phase, principally in the z direction, leads to an alpha-like structure in the [0,1,1] plane and reproduces the short range bonds of the alpha phase. This is an important link between two complex structures of Pu and opens new possibilities for exploring the very rich phase diagram of Pu through theoretical calculations.
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Affiliation(s)
- J Bouchet
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
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37
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Abstract
There were no serious head injuries in modern Cardiff municipal playgrounds with safety surfaces over five years injury surveillance. The literature suggests serious head injuries did occur before the introduction of safety surfaces.
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Affiliation(s)
- C Norton
- Accident and Emergency Department, Cardiff and Vale NHS Trust, UK
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Trinkle DR, Hennig RG, Srinivasan SG, Hatch DM, Jones MD, Stokes HT, Albers RC, Wilkins JW. New mechanism for the alpha to omega martensitic transformation in pure titanium. Phys Rev Lett 2003; 91:025701. [PMID: 12906490 DOI: 10.1103/physrevlett.91.025701] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2003] [Indexed: 05/24/2023]
Abstract
We propose a new direct mechanism for the pressure driven alpha-->omega martensitic transformation in pure titanium. A systematic algorithm enumerates all possible pathways whose energy barriers are evaluated. A new, homogeneous pathway emerges with a barrier at least 4 times lower than other pathways. The pathway is shown to be favorable in any nucleation model.
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Affiliation(s)
- D R Trinkle
- The Ohio State University, Columbus, Ohio 43210, USA
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Xue SA, Jones MD, Lu QL, Middeldorp JM, Griffin BE. Genetic diversity: frameshift mechanisms alter coding of a gene (Epstein-Barr virus LF3 gene) that contains multiple 102-base-pair direct sequence repeats. Mol Cell Biol 2003; 23:2192-201. [PMID: 12612089 PMCID: PMC149476 DOI: 10.1128/mcb.23.6.2192-2201.2003] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [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: 11/20/2022] Open
Abstract
Frameshift mutations provide recognized mechanisms for changing the coding potential of an organism. Here, multiple frameshifts are identified in repetitive sequences within an Epstein-Barr virus unspliced early gene, LF3, which is associated with the viral replicative cycle and also transcriptionally expressed in many virally associated tumors. On the DNA strand encoding LF3, there are three open reading frames, only one of which contains an initiation codon. Most (>95%) of the gene consists of numerous (>20, varying with cell source) GC-rich copies of a 102-bp direct repeat (called IR 4) flanked by small unique sequences. LF3 may express a protein if its initiation and termination codons reside in the same reading frame, but this is not always the case. Frameshifting events, occurring in short runs of pyrimidines (mainly C residues) in the repeats, give rise to mutations which may provide a mechanism for escape of an LF3 function from host surveillance. Sequence studies link these frameshifts to DNA replication errors. Notably, the number of sites in LF3 at which such mutations can occur permits a very large amount of diversity in this gene. Our data also suggest a second degeneracy mechanism within the protein itself, which influences its stability and may reflect a host defense mechanism. LF3 thus provides a potentially important model for studying the quest for supremacy between a virus and its host.
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Affiliation(s)
- Shao-An Xue
- Viral Oncology Unit, Division of Medicine, Wright-Fleming Institute, Imperial College of Science, Technology and Medicine at St. Mary's, Norfolk Place, London W2 1PG, UK
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40
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Abstract
An unconscious 8 weeks old infant was admitted to hospital and found to have bilateral, subdural and retinal haemorrhages. He died the following day. The explanation for the subdural haemorrhage put forward by his carers was that the infant had been in a baby-rocker and that the carers had seen the rocker being rocked vigorously by their 14 months old daughter on two separate occasions. This paper describes the biomechanics of an infant model in the particular baby-rocker used and determines the maximum forces generated, comparing them with the 'forces' thought to be compatible with the causation of subdural haemorrhage.
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Affiliation(s)
- M D Jones
- Medical Engineering Research Unit, Cardiff School of Engineering, Cardiff University, Queens Building The Parade, P.O. Box 925, Newport Road, Cardiff CF24 OYF, UK
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Horrocks M, Jones MD, Beever RE, Sutton DG. Analysis of plant microfossils in prehistoric coprolites from Harataonga Bay, Great Barrier Island, New Zealand. J R Soc N Z 2002. [DOI: 10.1080/03014223.2002.9517712] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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42
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43
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Cory CZ, Jones MD, James DS, Leadbeatter S, Nokes LD. The potential and limitations of utilising head impact injury models to assess the likelihood of significant head injury in infants after a fall. Forensic Sci Int 2001; 123:89-106. [PMID: 11728733 DOI: 10.1016/s0379-0738(01)00523-0] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The use of engineering principles in assessing head injury scenarios is of increasing significance in investigations into suspected child abuse. A fall scenario is often given as the history for a head injury to an infant. This paper addresses the basic engineering principles and factors to be considered when calculating the severity of a head impact after free-fall. The application of head injury models (HIMs) to ascertain the forces involved in childhood head injuries from impact is also discussed. Previous studies including Duhaime et al. [J. Neurosurg. 66 (1987) 409] and Nokes et al. [Forensic Sci. Int. 79 (1995) 85] have utilised HIMs for this purpose: this paper reviews those models most widely documented.The HIM currently considered the 'state-of-the-art' is the head injury criterion (HIC) and it is suggested that this model should be utilised for assessing head impact injury in child abuse cases where appropriate.
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Affiliation(s)
- C Z Cory
- Medical Engineering Research Unit, ENGIN, University of Wales Cardiff, P.O. Box 685, Cardiff, Wales, UK.
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Abstract
The SNAP-25 deficient mouse mutant coloboma (Cm/+) is an animal model for investigating the biochemical basis of locomotor hyperactivity. The spontaneous hyperactivity exhibited by coloboma is three times greater than control mice and is a direct result of the SNAP-25 deletion. SNAP-25 is a presynaptic protein that regulates exocytotic neurotransmitter release; coloboma mice express only 50% of normal protein concentrations. Previous research has determined that there is an increase in the concentration of norepinephrine but a decrease in dopamine utilization in the striatum and nucleus accumbens of coloboma mice. In situ hybridization analysis revealed that there were corresponding increases in tyrosine hydroxylase (TH) mRNA expression in noradrenergic cell bodies of the locus coeruleus of Cm/+ mice. In contrast, TH mRNA expression in substantia nigra appeared normal in the mutant mouse. alpha(2)-Adrenergic receptors are important modulators of central noradrenergic function and dopamine release. In situ hybridization data revealed that alpha(2A)-adrenergic receptor mRNA expression is upregulated in Cm/+ mice. These results suggest an underlying abnormality in noradrenergic regulation in this hyperactive mouse mutant.
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Affiliation(s)
- M D Jones
- Department of Neurology, Johns Hopkins University School of Medicine, 600 North Wolfe Street, Baltimore, MD 21287, USA
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Affiliation(s)
- M D Jones
- University of Colorado School of Medicine and The Children's Hospital, Denver, USA
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O'Callaghan PT, Jones MD, Holt CA, Leadbeatter S, Dent C, Nokes LD. A novel approach to forensic investigation: three-dimensional kinematic and kinetic motion analysis. J Clin Forensic Med 2001; 8:49-53. [PMID: 15274972 DOI: 10.1054/jcfm.2001.0487] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/30/2023]
Abstract
Following a domestic incident, a five-year-old child was pronounced dead on arrival at hospital. The subsequent post-mortem examination found that the cause of death was peritonitis as a result of a rupture of the duodenum. During the police interview, the main suspect alleged that the injury occurred whilst playing a game which involved standing on the child's abdomen and chest. A reconstruction of the game was performed using 3-dimensional kinematic and kinetic motion analysis to investigate the feasibility of the statement as described by the defendant. Presented is a summary of the investigation together with a description of kinematic and kinetic methods employed.
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Affiliation(s)
- P T O'Callaghan
- Department of Physiology, Faculty of Medical and Health Sciences, The University of Auckland, Auckland, New Zealand
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O'Callaghan PT, Jones MD, James DS, Leadbeatter S, Evans SL, Nokes LD. A biomechanical reconstruction of a wound caused by a glass shard--a case report. Forensic Sci Int 2001; 117:221-31. [PMID: 11248453 DOI: 10.1016/s0379-0738(00)00399-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
During the course of a criminal trial, an investigating pathologist is commonly asked how much force was required to produce an injury. This subjective opinion is based on the pathologist's previous experience of dealing with wounds inflicted with similar weapons. However, in the case of stab wounds inflicted by broken glass, it is unlikely that two glass fragments would be physically similar. In the case studied, two theories were examined: that a wound resulted from a thrown glass fragment or that it had been caused as a stab injury by the glass held in the bare hand. The investigation involved quantifying the energy required for human tissue penetration, comparison of sharpness, a biomechanical analysis of throwing actions and testing of the hypothesis that if the glass shard were used as a stabbing implement it would result in a cut to the hand.The investigation utilised a scientific methodology that reduced the need for speculative (though informed) opinion from the pathologist by producing quantitative results.
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Affiliation(s)
- P T O'Callaghan
- Medical Engineering Research Unit, School of Engineering, Cardiff University, Queens Buildings, The Parade, Wales, UK.
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Abstract
The consequences of a reduction in the presynaptic protein, SNAP-25, were investigated to determine the neurochemical basis of the marked hyperlocomotor activity in coloboma (Cm/+) mice. SNAP-25 is part of the minimal presynaptic machinery necessary for exocytotic neurotransmitter release. Reserpine treatment was used to deplete vesicular stores of catecholamines. Coloboma mice were more sensitive to the effects of reserpine than control mice. However, presynaptic regulation of dopamine (DA) release, as assessed by low-dose apomorphine challenge, was intact. There were region-specific reductions in in vivo tyrosine hydroxylation and the DA metabolites homovanillic acid (HVA) and 3,4-dihydroxyphenylacetic acid (DOPAC) in the striatum and nucleus accumbens of Cm/+ mice. While hyperactivity is often associated with changes in DA concentration, norepinephrine (NE) concentration was significantly increased in the striatum and nucleus accumbens of the hyperactive mutant. The increase in NE may regulate the hyperactivity in these mice, as suggested by current hypotheses of the mechanisms underlying attention-deficit hyperactivity disorder (ADHD) and Tourette's syndrome.
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Affiliation(s)
- M D Jones
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
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Bures EJ, Courchesne PL, Douglass J, Chen K, Davis MT, Jones MD, McGinley MD, Robinson JH, Spahr CS, Sun J, Wahl RC, Patterson SD. Identification of incompletely processed potential carboxypeptidase E substrates from CpEfat/CpEfat mice. Proteomics 2001; 1:79-92. [PMID: 11680901 DOI: 10.1002/1615-9861(200101)1:1<79::aid-prot79>3.0.co;2-8] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [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: 11/12/2022]
Abstract
In an attempt to identify peptides that may be involved in the obese phenotype observed in CpEfat/CpEfat mice (deficient in Carboxypeptidase E, CpE) samples from fourteen neuroendocrine tissues in wild-type and CpEfat/CpEfat mice were obtained. Peptides were purified from these tissues and potential CpE substrate peptides were enriched using an anhydrotrypsin column that captures peptides with basic C-termini. Bound peptides were subjected to tryptic digestion and followed by liquid chromatography-mass spectrometry analysis. The relative levels of CpEfat/CpEfat versus wild-type peptides were determined by comparison of the ion intensities. Peptide ions elevated in the CpEfat/CpEfat samples were identified by targeted liquid chromatography-tandem mass spectrometry. From those ions, 27 peptides derived from known neuropeptides (including CpE substrates) were identified, together with another 25 peptides from proteins not known to be components of the neuropeptide processing pathway. The known CpE substrates identified included the recently discovered proSAAS, granin-like neuroendocrine peptide precursor that inhibits prohormone processing. The approach demonstrated the feasibility of using an affinity-based method for identifying differences in specific classes of peptides between normal and mutant mice.
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Affiliation(s)
- E J Bures
- Departments of Biochemistry and Genetics, Amgen, Thousand Oaks, CA, USA
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Jones MD, Boat T, Adler R, Gephart HR, Osborn LM, Chesney RW, Mulvey HJ, Simon JL, Alden ER. Final report of the FOPE II Financing of Pediatric Education Workgroup. Pediatrics 2000; 106:1256-70. [PMID: 11073555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/18/2023] Open
Abstract
Some of the challenges of financing pediatric medical education are shared with all medical education; others are specific to pediatrics. The general disadvantage that funding of graduate medical education (GME) is linked to reimbursement for clinical care has uniquely negative consequences for freestanding children's hospitals because they therefore receive little Medicare GME support. This represents both a competitive disadvantage for such hospitals and an aggregate federal underinvestment in children's health care that now amounts to billions of dollars. The need to subsidize medical student and subspecialty education with clinical practice revenue jeopardizes both activities in pediatric departments already burdened by inadequate reimbursement for children's health care and the extra costs of ambulatory care. The challenges of funding are complicated by rising costs as curriculum expands and clinical education moves to ambulatory settings. Controversies over prioritization of resources are inevitable. Solutions require specification of costs of education and a durable mechanism for building consensus within the pediatric community. Pediatrics 2000;106(suppl):1256-1269; medical student education, continuing medical education, medical subspecialties, children, pediatrics, health maintenance organizations, managed care, hospital finances, children's hospitals.
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Affiliation(s)
- M D Jones
- University of Colorado School of Medicine, Children's Hospital, Denver, Colorado, USA
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