1
|
Murphy D, Stephenson J, Bouhbib Y, Graby J, Khavandi A, Lyen S, Hudson B, Rodrigues JCL. Investigating the impact of non-gated thoracic CT prior to CTCA to reduce layered testing. Clin Radiol 2023; 78:947-954. [PMID: 37718182 DOI: 10.1016/j.crad.2023.08.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 08/15/2023] [Accepted: 08/16/2023] [Indexed: 09/19/2023]
Abstract
AIM To determine the proportion of computed tomography (CT) coronary angiography (CTCA) referrals with coronary artery calcification (CAC) evident on previous non-cardiac CT imaging and how this impacted the diagnostic yield for CTCA, the requirement for additional diagnostic testing, and the associated costs to confirm or refute obstructive coronary artery disease (CAD). MATERIALS AND METHODS A retrospective review of CTCA examinations was undertaken between 01/05/2018 and 31/05/2020 in which the examinations were cross referenced for previous non-gated thoracic CT at Royal United Hospitals Bath. Major epicardial vessel CAC on baseline CT was re-evaluated by published semi-quantitative methods, giving a per-patient CAC score (mild = 1-3, moderate = 4-6, severe >6). Subsequent incomplete CTCA diagnostic yield, further testing, and cost implications were examined. RESULTS Of the 2140 CTCA examinations identified, 13% (280/2140) had a preceding non-gated thoracic CT (53% female, age 63 ± 11 years). The incomplete diagnostic rate increased with CAC grade, mild 32%, (RR 12; 95% CI 4-40), moderate 64% (RR 25; 95% CI 8-80), severe 75%, (RR 29; 95% CI 9-94). Additional diagnostic testing occurred in 4% for the mild CAC category, and 14% and 42% for moderate and severe, respectively. When severe CAC was identified on a non-gated thoracic CT a cost saving of £171/patient (dobutamine stress echo [DSE]) and £61/patient (myocardial perfusion scintigraphy [MPS]) was established with a direct to functional testing pathway. CONCLUSIONS In patients referred for CTCA where severe CAC was identified on a preceding non-gated thoracic CT a direct to functional testing altered management in 42% of cases and was cost-effective.
Collapse
Affiliation(s)
- D Murphy
- Department of Cardiology, Royal United Hospitals Bath, Bath, UK; Department for Health, University of Bath, Bath, UK
| | - J Stephenson
- Department of Cardiology, Royal United Hospitals Bath, Bath, UK
| | - Y Bouhbib
- Department of Radiology, Royal United Hospitals Bath, Bath, UK
| | - J Graby
- Department of Cardiology, Royal United Hospitals Bath, Bath, UK; Department for Health, University of Bath, Bath, UK
| | - A Khavandi
- Department of Cardiology, Royal United Hospitals Bath, Bath, UK
| | - S Lyen
- Department of Radiology, Royal United Hospitals Bath, Bath, UK
| | - B Hudson
- Department of Radiology, Royal United Hospitals Bath, Bath, UK
| | - J C L Rodrigues
- Department for Health, University of Bath, Bath, UK; Department of Radiology, Royal United Hospitals Bath, Bath, UK.
| |
Collapse
|
2
|
Guo S, Ramar V, Guo AA, Saafir T, Akpobiyeri H, Hudson B, Li J, Liu M. TRPM7 transactivates the FOSL1 gene through STAT3 and enhances glioma stemness. Cell Mol Life Sci 2023; 80:270. [PMID: 37642779 PMCID: PMC10465393 DOI: 10.1007/s00018-023-04921-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 07/20/2023] [Accepted: 08/09/2023] [Indexed: 08/31/2023]
Abstract
INTRODUCTION We previously reported that TRPM7 regulates glioma cells' stemness through STAT3. In addition, we demonstrated that FOSL1 is a response gene for TRPM7, and the FOSL1 gene serves as an oncogene to promote glioma proliferation and invasion. METHODS In the present study, we determined the effects of FOSL1 on glioma stem cell (GSC) markers CD133 and ALDH1 by flow cytometry, and the maintenance of stem cell activity by extreme limiting dilution assays (ELDA). To further gain insight into the mechanism by which TRPM7 activates transcription of the FOSL1 gene to contribute to glioma stemness, we constructed a FOSL1 promoter and its GAS mutants followed by luciferase reporter assays and ChIP-qPCR in a glioma cell line and glioma patient-derived xenoline. We further examined GSC markers ALDH1 and TRPM7 as well as FOSL1 by immunohistochemistry staining (IHC) in brain tissue microarray (TMA) of glioma patients. RESULTS We revealed that FOSL1 knockdown reduces the expression of GSC markers CD133 and ALDH1, and FOSL1 is required to maintain stem cell activity in glioma cells. The experiments also showed that mutations of - 328 to - 336 and - 378 to - 386 GAS elements markedly reduced FOSL1 promoter activity. Constitutively active STAT3 increased while dominant-negative STAT3 decreased FOSL1 promoter activity. Furthermore, overexpression of TRPM7 enhanced while silencing of TRPM7 reduced FOSL1 promoter activity. ChIP-qPCR assays revealed that STAT3, present in nuclear lysates of glioma cells stimulated by constitutively activated STAT3, can bind to two GAS elements, respectively. We demonstrated that deacetylation of FOSL1 at the Lys-116 residue located within its DNA binding domain led to an increase in FOSL1 transcriptional activity. We found that the expression of TRPM7, ALDH1, and FOSL1 protein is associated with grades of malignant glioma, and TRPM7 protein expression correlates to the expression of ALDH1 and FOSL1 in glioma patients. CONCLUSIONS These combined results demonstrated that TRPM7 induced FOSL1 transcriptional activation, which is mediated by the action of STAT3, a mechanism shown to be important in glioma stemness. These results indicated that FOSL1, similar to GSC markers ALDH1 and TRPM7, is a diagnostic marker and potential drug target for glioma patients.
Collapse
Affiliation(s)
- Shanchun Guo
- Department of Chemistry, Xavier University, 1 Drexel Dr, New Orleans, LA, USA
| | - Vanajothi Ramar
- Department of Microbiology, Biochemistry and Immunology, Morehouse School of Medicine, Atlanta, USA
| | - Alyssa A Guo
- University of South Carolina SOM Greenville, Greenville, SC, USA
| | - Talib Saafir
- Department of Microbiology, Biochemistry and Immunology, Morehouse School of Medicine, Atlanta, USA
| | - Hannah Akpobiyeri
- Department of Microbiology, Biochemistry and Immunology, Morehouse School of Medicine, Atlanta, USA
| | - Breanna Hudson
- Department of Microbiology, Biochemistry and Immunology, Morehouse School of Medicine, Atlanta, USA
| | - Jason Li
- Wake Forest University School of Medicine, 475 Vine Street, Winston-Salem, NC, USA
| | - Mingli Liu
- Department of Microbiology, Biochemistry and Immunology, Morehouse School of Medicine, Atlanta, USA.
| |
Collapse
|
3
|
Murphy D, Graby J, McKenzie D, Kandan SR, Carson K, Lowe R, Khavandi A, Hudson B, Rodrigues J. FFRCT and Invasive Coronary Angiography – assessing concordance in an unselected UK real world population. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.1186] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background/Introduction
CT coronary angiography (CTCA) Fractional Flow Reserve (FFRCT) is a key investigation in chronic coronary syndrome (CCS) guidelines. FFR calculated from CTCA may help improve CTCA specificity for flow limiting disease, preventing unnecessary invasive coronary angiography (ICA).
Purpose
To (1) assess the treatment planning potential of FFRCT by determining the concordance of FFRCT with an ICA +/− invasive physiological assessment for the detection of flow limiting CAD in a real world NHS setting and (2) concordance sub-analysis of concordance of invasive iFR and FFRCT.
Methods
A single-centre retrospective analysis of a prospectively maintained clinical CTCA database. We identified patients with CCS who had CTCA FFRCT and subsequent ICA from August 2018 to January 2021. Concordance was assessed on a per patient and per vessel basis (major epicardial vessels: left main stem [LMS], left anterior descending artery [LAD], circumflex [LCx], right coronary artery [RCA]). Two non-invasive ischaemia thresholds were examined an FFRCT ≤0.8 and <0.75 (2 cm distal to stenosis). This was compared to a clinical ICA assessment where a flow limiting lesion was defined as a stenosis >70% (or >50% in the LMS) and/or an end vessel iFR ≤0.89 / FFR ≤0.8. All vessels that underwent an iFR, at the interventionists discretion, were then assessed relative to their end-vessel FFRCT.
Results
565 patients had a CTCA with FFRCT and 164 patients had a subsequent ICA and were suitable for analysis. On a per patient basis 69% of those referred to ICA with an FFRCT ≤0.8 of at least one major epicardial vessel had any flow limiting CAD at ICA. With an FFRCT <0.75 this was 73%. Table 1 illustrates the per vessel concordance.
A total of 120 vessels were included in the iFR subsection analysis. The mean FFRCT was 0.71 (±0.13) and mean iFR was 0.89 (±0.1). Accuracy was 54% (95% CI 45–63%) with a sensitivity of 89% (95% CI 76–96%), specificity 32% (95% CI 22–44%), positive predictive value 45% (95% CI 40–50%) and negative predictive value of 83% (95% CI 66–92%). A Pearson's correlation coefficient of 0.23 was found.
Conclusion
This study demonstrated that the negative predictive value of FFRCT was excellent, including importantly for LMS analysis. The specificity on a per vessel basis was good with the exception of the LAD assessment. This may have implications for interventional planning with this imaging modality. FFRCT correlated poorly with invasive iFR in this subsection analysis although selection bias may be contributing. There remains a significant proportion of patients referred for an ICA where no flow limiting CAD is found.
Funding Acknowledgement
Type of funding sources: None. Table 1. Per vessel concordance analysis of potential flow limiting FFRCT relative to clinical ICA findings. Analysed with an ischaemia threshold of FFRCT ≤0.80 and <0.75. PPV = Positive Predictive Value. NPV = Negative Predictive Value.
Collapse
Affiliation(s)
- D Murphy
- Royal United Hospital Bath NHS Trust, Bath, United Kingdom
| | - J Graby
- Royal United Hospital Bath NHS Trust, Bath, United Kingdom
| | - D McKenzie
- Royal United Hospital Bath NHS Trust, Bath, United Kingdom
| | - S R Kandan
- Royal United Hospital Bath NHS Trust, Bath, United Kingdom
| | - K Carson
- Royal United Hospital Bath NHS Trust, Bath, United Kingdom
| | - R Lowe
- Royal United Hospital Bath NHS Trust, Bath, United Kingdom
| | - A Khavandi
- Royal United Hospital Bath NHS Trust, Bath, United Kingdom
| | - B Hudson
- Royal United Hospital Bath NHS Trust, Bath, United Kingdom
| | - J Rodrigues
- Royal United Hospital Bath NHS Trust, Bath, United Kingdom
| |
Collapse
|
4
|
Rogans-Watson R, Shulman C, Lewer D, Armstrong M, Hudson B. 23 Frailty, Older Age-Associated Conditions, and Multimorbidity Amongst People Experiencing Homelessness in A Hostel in London. Age Ageing 2021. [DOI: 10.1093/ageing/afab029.02] [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: 11/13/2022] Open
Abstract
Abstract
Introduction
People experiencing homelessness (PEH) face poor health outcomes and extreme health inequity, and evidence suggests earlier onset of older age-associated conditions and signs of premature ageing. This is the first UK study to assess frailty in this population. The objective was to assess frailty, age-associated conditions, and multimorbidity in PEH residing in hostel accommodation, drawing comparisons with population data.
Methods
Participants were drawn from a hostel in London for PEH aged over 30. Age-associated conditions were identified using validated tools and a questionnaire modelled on comprehensive geriatric assessments. Participants’ keyworkers completed questionnaires to provide collateral information. Frailty was defined according to five criteria in Fried’s phenotype model: participants with three or more criteria are classified as frail, one or two criteria as vulnerable, and no criteria as not frail. Multimorbidity was defined as the presence of two or more long-term conditions in one person. Comparisons were made with population data from The English Longitudinal Study of Ageing and Health Survey for England.
Results
Thirty-three people participated (83% of eligible residents), with a mean age of 55.7 years (range 38–74). Frailty was identified in 18/33 participants (55%), with 13/33 (39%) classified as vulnerable, and 2/33 (6%) as not frail. Participants met an average of 2.6/5 frailty phenotype criteria, comparable to 90-year-olds in the general population. The most common age-associated conditions identified were: falls (in 61%), visual impairment (61%), low grip strength (61%), mobility impairment (52%), and cognitive impairment (45%). Multimorbidity was present in all thirty-three participants.
Conclusions
A wide range of unmet health needs was identified. The high prevalence of frailty and age-associated conditions support evidence of premature ageing, indicating a need to include holistic older-age assessments in PEH at a younger age. Involvement of health professionals with experience of working with older people could contribute to improving health outcomes for homeless patients.
Collapse
Affiliation(s)
- R Rogans-Watson
- Dept of Elderly Care, Croydon University Hospital, London
- Pathway: UK's leading homeless healthcare charity, London
| | - C Shulman
- Pathway: UK's leading homeless healthcare charity, London
- Marie Curie Research Department, Division of Psychiatry, UCL
| | - D Lewer
- Department of Epidemiology & Public Health, UCL, London
| | - M Armstrong
- Pathway: UK's leading homeless healthcare charity, London
- Marie Curie Research Department, Division of Psychiatry, UCL
| | - B Hudson
- Pathway: UK's leading homeless healthcare charity, London
- Marie Curie Research Department, Division of Psychiatry, UCL
| |
Collapse
|
5
|
Willis JA, Kendler-Rhodes A, Slegg O, Carson K, Easaw J, Kandan SR, Rodrigues JCL, MacKenzie-Ross R, Hall T, Robinson G, Little D, Hudson B, Pauling J, Redman S, Graham R, Coghlan G, Suntharalingam J, Augustine DX. Abstract 5: BSE pulmonary hypertension guidelines: audit and future perspectives. Echo Res Pract 2020. [DOI: 10.1007/bf03651757] [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: 11/28/2022] Open
|
6
|
Sharma V, Al Saikhan L, Park C, Hughes A, Gu H, Saeed S, Boguslavskyi A, Carr-White G, Chambers J, Chowienczyk P, Jain M, Jessop H, Turner C, Bassindale-Maguire G, Baig W, Kidambi A, Abdel-Rahman ST, Schlosshan D, Sengupta A, Fitzpatrick A, Sandoval J, Hickman S, Procter H, Taylor J, Kaur H, Knowles C, Wheatcroft S, Witte K, Gatenby K, Willis JA, Kendler-Rhodes A, Slegg O, Carson K, Easaw J, Kandan SR, Rodrigues JCL, MacKenzie-Ross R, Hall T, Robinson G, Little D, Hudson B, Pauling J, Redman S, Graham R, Coghlan G, Suntharalingam J, Augustine DX, Nowak JWM, Masters AT. Report from the Annual Conference of the British Society of Echocardiography, October 2018, ACC Liverpool, Liverpool. Echo Res Pract 2020; 7:M1. [PMID: 33112840 PMCID: PMC8693154 DOI: 10.1530/erp-20-0037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Affiliation(s)
- V Sharma
- Liverpool University Hospitals NHS Foundation Trust, Liverpool, UK
| | - L Al Saikhan
- MRC Unit for Lifelong Health and Aging at UCL, Department of Population Science & Experimental Medicine, UCL Institute of Cardiovascular Science, University College London, London, UK.,Department of Cardiac Technology, College of Applied Medical Sciences, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - C Park
- MRC Unit for Lifelong Health and Aging at UCL, Department of Population Science & Experimental Medicine, UCL Institute of Cardiovascular Science, University College London, London, UK
| | - A Hughes
- MRC Unit for Lifelong Health and Aging at UCL, Department of Population Science & Experimental Medicine, UCL Institute of Cardiovascular Science, University College London, London, UK
| | - H Gu
- British Heart Foundation Centre, King's College London, London, UK
| | - S Saeed
- Haukeland University Hospital, Bergen, Norway
| | - A Boguslavskyi
- British Heart Foundation Centre, King's College London, London, UK
| | - G Carr-White
- British Heart Foundation Centre, King's College London, London, UK.,Cardiothoracic Centre, St Thomas' Hospital, London, UK
| | - J Chambers
- Cardiothoracic Centre, St Thomas' Hospital, London, UK
| | - P Chowienczyk
- British Heart Foundation Centre, King's College London, London, UK
| | - M Jain
- Yorkshire Heart Centre, Leeds General Infirmary, Leeds, UK
| | - H Jessop
- Yorkshire Heart Centre, Leeds General Infirmary, Leeds, UK
| | - C Turner
- Yorkshire Heart Centre, Leeds General Infirmary, Leeds, UK.,Department of Cardiology, Leeds General Infirmary, Leeds Teaching Hospitals NHS Trust, Leeds, UK
| | | | - W Baig
- Yorkshire Heart Centre, Leeds General Infirmary, Leeds, UK
| | - A Kidambi
- Yorkshire Heart Centre, Leeds General Infirmary, Leeds, UK
| | | | - D Schlosshan
- Yorkshire Heart Centre, Leeds General Infirmary, Leeds, UK
| | - A Sengupta
- Department of Cardiology, Leeds General Infirmary, Leeds Teaching Hospitals NHS Trust, Leeds, UK
| | - A Fitzpatrick
- Department of Cardiology, Leeds General Infirmary, Leeds Teaching Hospitals NHS Trust, Leeds, UK
| | - J Sandoval
- Department of Cardiology, Leeds General Infirmary, Leeds Teaching Hospitals NHS Trust, Leeds, UK
| | - S Hickman
- Department of Cardiology, Leeds General Infirmary, Leeds Teaching Hospitals NHS Trust, Leeds, UK
| | - H Procter
- Department of Cardiology, Leeds General Infirmary, Leeds Teaching Hospitals NHS Trust, Leeds, UK
| | - J Taylor
- Department of Cardiology, Leeds General Infirmary, Leeds Teaching Hospitals NHS Trust, Leeds, UK
| | - H Kaur
- Department of Cardiology, Leeds General Infirmary, Leeds Teaching Hospitals NHS Trust, Leeds, UK
| | - C Knowles
- Department of Cardiology, Leeds General Infirmary, Leeds Teaching Hospitals NHS Trust, Leeds, UK
| | - S Wheatcroft
- Department of Cardiology, Leeds General Infirmary, Leeds Teaching Hospitals NHS Trust, Leeds, UK
| | - K Witte
- Department of Cardiology, Leeds General Infirmary, Leeds Teaching Hospitals NHS Trust, Leeds, UK
| | - K Gatenby
- Department of Cardiology, Leeds General Infirmary, Leeds Teaching Hospitals NHS Trust, Leeds, UK
| | - J A Willis
- Royal United Hospitals Bath, NHS Foundation Trust, Bath, UK
| | | | - O Slegg
- Royal United Hospitals Bath, NHS Foundation Trust, Bath, UK
| | - K Carson
- Royal United Hospitals Bath, NHS Foundation Trust, Bath, UK
| | - J Easaw
- Royal United Hospitals Bath, NHS Foundation Trust, Bath, UK
| | - S R Kandan
- Royal United Hospitals Bath, NHS Foundation Trust, Bath, UK
| | | | | | - T Hall
- Royal United Hospitals Bath, NHS Foundation Trust, Bath, UK
| | - G Robinson
- Royal United Hospitals Bath, NHS Foundation Trust, Bath, UK
| | - D Little
- Royal United Hospitals Bath, NHS Foundation Trust, Bath, UK
| | - B Hudson
- Royal United Hospitals Bath, NHS Foundation Trust, Bath, UK
| | - J Pauling
- Royal United Hospitals Bath, NHS Foundation Trust, Bath, UK
| | - S Redman
- Royal United Hospitals Bath, NHS Foundation Trust, Bath, UK
| | - R Graham
- Royal United Hospitals Bath, NHS Foundation Trust, Bath, UK
| | - G Coghlan
- Department of Cardiology, Royal Free Hospital, London, UK
| | - J Suntharalingam
- Royal United Hospitals Bath, NHS Foundation Trust, Bath, UK.,University of Bath, Bath, UK
| | - D X Augustine
- Royal United Hospitals Bath, NHS Foundation Trust, Bath, UK
| | - J W M Nowak
- Royal United Hospitals Bath, NHS Foundation Trust, Bath, UK
| | - A T Masters
- University Hospitals Bristol NHS Foundation Trust, Bristol, UK
| |
Collapse
|
7
|
Stoschus H, Thomas DM, Hudson B, Watkins M, Finkenthal DF, Moyer RA, Osborne TH. Status and characterization of the lithium beam diagnostic on DIII-D. Rev Sci Instrum 2013; 84:083503. [PMID: 24007061 DOI: 10.1063/1.4816824] [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: 06/02/2023]
Abstract
The 30 keV lithium beam diagnostic on DIII-D is suitable to measure both the radial electron density and poloidal magnetic field profiles in the pedestal. The refurbished system features a new setup to measure the Doppler shift allowing accurate alignment of the spectral filters. The injector has been optimized to generate a stable lithium neutral beam with a current of I = 15-20 mA and a diameter of 1.9 ± 0.1 cm measured by beam imaging. The typical temporal resolution is Δt = 1-10 ms and the radial resolution of ΔR = 5 mm is given by the optical setup. A new analysis technique based on fast Fourier transform avoids systematic error contributions from the digital lock-in analysis and accounts intrinsically for background light correction. Latest upgrades and a detailed characterization of the system are presented. Proof-of-principle measurements of the poloidal magnetic field with a statistical error of typically 2% show a fair agreement with the predictions modeled with the Grad-Shafranov equilibrium solver EFIT within 4%.
Collapse
Affiliation(s)
- H Stoschus
- Oak Ridge Institute for Science and Education, Oak Ridge, Tennessee 37831-0117, USA
| | | | | | | | | | | | | |
Collapse
|
8
|
|
9
|
Stoschus H, Thomas DM, Hudson B, Muñoz Burgos JM, Schweinzer J. Comparison of collisional radiative models for edge electron density reconstruction from Li I (2s-2p) emission profiles. Rev Sci Instrum 2012; 83:10D508. [PMID: 23126851 DOI: 10.1063/1.4731008] [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: 06/01/2023]
Abstract
Four collisional radiative models (CRMs) for reconstruction of the edge electron density profile from the measured Li I (2s-2p) emission profile of an accelerated lithium beam are compared using experimental data from DIII-D. It is shown for both L- and H-mode plasmas that edge density profiles reconstructed with the CRMs DDD2, ABSOLUT, [Sasaki et al. Rev. Sci. Instrum. 64, 1699 (1993)] and a new model developed at DIII-D agree in a density scan from n(e) (ped) = (2.0-6.5) × 10(19) m(-3) within 20%, 20%, <5%, and 40%, respectively, of the pedestal density measured with Thomson scattering. Profile shape and absolute density vary in a scan of the effective ion charge Z(eff) = 1-6 up to a factor of two but agree with Thomson data for Z(eff) = 1-2 within the error bars.
Collapse
Affiliation(s)
- H Stoschus
- Oak Ridge Institute for Science and Education, Oak Ridge, Tennessee 37831-0117, USA.
| | | | | | | | | |
Collapse
|
10
|
Traylor RN, Dobyns WB, Rosenfeld JA, Wheeler P, Spence JE, Bandholz AM, Bawle EV, Carmany EP, Powell CM, Hudson B, Schultz RA, Shaffer LG, Ballif BC. Investigation of TBR1 Hemizygosity: Four Individuals with 2q24 Microdeletions. Mol Syndromol 2012; 3:102-112. [PMID: 23112752 DOI: 10.1159/000342008] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/13/2012] [Indexed: 12/19/2022] Open
Abstract
TBR1 encodes a transcription factor with critical roles in corticogenesis, including cortical neuron migration and axon pathfinding, establishment of regional and laminar identity of cortical neurons, and control of glutamatergic neuronal cell fate. Based upon TBR1's role in cortical development, we sought to investigate TBR1 hemizygosity in individuals referred for genetic evaluation of intellectual disability and developmental delay. We describe 4 patients with microdeletions identified by molecular cytogenetic techniques, encompassing TBR1 and spanning 2q24.1q31.1, ranging in size from 2.17 to 12.34 Mb. Only the patient with the largest deletion had a possible cortical malformation. Mild ventriculomegaly is the only common brain anomaly, present in all patients; a Chiari I malformation is seen in 2 patients, and mega cisterna magna is seen in a third. Our findings are consistent with Tbr1 mouse models showing that hemizygosity of the gene requires additional genetic factors for the manifestation of severe structural brain malformations. Other syndromic features are present in these patients, including autism spectrum disorders, ocular colobomas, and craniosynostosis, features that are likely affected by the deletion of genes other than TBR1.
Collapse
Affiliation(s)
- R N Traylor
- Signature Genomic Laboratories, PerkinElmer Inc., Spokane, Wash., USA
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
11
|
Quinn A, Braude S, Hudson B. Sepsis and fulminant multi-organ failure associated with Vibrio vulnificus infection. Intern Med J 2011; 40:734. [PMID: 21038545 DOI: 10.1111/j.1445-5994.2010.02335.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- A Quinn
- Critical Care Unit, Manly Hospital, Royal North Shore Hospital, Sydney, New South Wales, Australia
| | | | | |
Collapse
|
12
|
|
13
|
|
14
|
Abstract
Parinaric acid (9,11,13,15-octadecatetraenoic acid), a conjugated tetraene fatty acid, undergoes a second-order photochemical reaction in phospholipid bilayers. The reaction results in the loss of the characteristic absorption of this chromophore and the development of new absorption demonstrating the presence of a triene chromophore. The progress of this reaction is easily monitored by measurement of the decrease in the fluorescence intensity from a uniformly illuminated sample. The reaction rate measured in this way is sensitive to the thermal phase transition of the bilayer and to the presence of cholesterol. The relationship of the second-order rate constant to the lipid diffusion coefficient is discussed. This relationship differs from that previously used for the analysis of similar photochemical processes.
Collapse
Affiliation(s)
- C G Morgan
- Department of Chemistry, Stanford University, Stanford, California 94305
| | | | | |
Collapse
|
15
|
De Kretser DM, Burger HG, Hudson B, Keogh EJ. Effects of short-term administration of clomiphene citrate on serum FSH and LH levels in men with idiopathic disorders of spermatogenesis. Andrologia 2009; 6:25-33. [PMID: 4413164 DOI: 10.1111/j.1439-0272.1974.tb01587.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
|
16
|
Wang C, Burger HG, de Kretser DM, Dulmanis A, Hudson B, Keogh EJ, Suthers MB. Effect of mesterolone on serum FSH, LH and plasma testosterone in normal men. Andrologia 2009; 6:111-8. [PMID: 4418512 DOI: 10.1111/j.1439-0272.1974.tb01604.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
|
17
|
Abstract
Mycobacterium terrae is ubiquitous in our environment. M terrae infections most commonly involve tendon sheaths, bones, bursae, and joints. We report a case of infectious arthritis of the knee caused by M terrae in a 21-year-old man who had non-specific chronic synovitis. No organism was seen on microscopy or isolated from cultures until months later. Initially the M terrae culture was considered a contaminant and specific anti-mycobacterial treatment was not advised. The patient was commenced on suppressive therapy for persistent effusion and discomfort. Eventually, the M terrae infection was confirmed and he was commenced on clarithromycin, ciprofloxacin, and ethambutol. The triple antibiotic regimen was continued for 2 years. The knee improved but never completely settled. The patient chose to cease all antibiotic medication. The knee remained swollen and irritable, with little chance of eradicating the organism.
Collapse
Affiliation(s)
- B W Milne
- Department of Orthopaedics and Trauma Surgery, Royal North Shore Hospital, University of Sydney, Sydney, Australia.
| | | | | | | |
Collapse
|
18
|
Hudson B, Powell C. Towards evidence based medicine for paediatricians. Does oral aciclovir improve clinical outcome in immunocompetent children with primary herpes simplex gingivostomatitis? Arch Dis Child 2009; 94:165-7. [PMID: 19158139 DOI: 10.1136/adc.2008.145482] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- B Hudson
- Children's Hospital for Wales, University Hospital of Wales, Heath Park, Cardiff CF14 4XW, UK.
| | | |
Collapse
|
19
|
McIntosh BT, Hudson B, Yegorova S, Jollimore CAB, Kelly MEM. Agonist-dependent cannabinoid receptor signalling in human trabecular meshwork cells. Br J Pharmacol 2007; 152:1111-20. [PMID: 17922024 PMCID: PMC2095100 DOI: 10.1038/sj.bjp.0707495] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.9] [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: 01/28/2023] Open
Abstract
BACKGROUND AND PURPOSE Trabecular meshwork (TM) is an ocular tissue involved in the regulation of aqueous humour outflow and intraocular pressure (IOP). CB1 receptors (CB1) are present in TM and cannabinoid administration decreases IOP. CB1 signalling was investigated in a cell line derived from human TM (hTM). EXPERIMENTAL APPROACH CB1 signalling was investigated using ratiometric Ca2+ imaging, western blotting and infrared In-Cell Western analysis. KEY RESULTS WIN55212-2, a synthetic aminoalkylindole cannabinoid receptor agonist (10-100 microM) increased intracellular Ca2+ in hTM cells. WIN55,212-2-mediated Ca2+ increases were blocked by AM251, a CB1 antagonist, but were unaffected by the CB2 antagonist, AM630. The WIN55,212-2-mediated increase in [Ca2+]i was pertussis toxin (PTX)-insensitive, therefore, independent of Gi/o coupling, but was attenuated by a dominant negative Galpha(q/11) subunit, implicating a Gq/11 signalling pathway. The increase in [Ca2+]i was dependent upon PLC activation and mobilization of intracellular Ca2+ stores. A PTX-sensitive increase in extracellular signal-regulated kinase (ERK1/2) phosphorylation was also observed in response to WIN55,212-2, indicative of a Gi/o signalling pathway. CB1-Gq/11 coupling to activate PLC-dependent increases in Ca2+ appeared to be specific to WIN55,212-2 and were not observed with other CB1 agonists, including CP55,940 and methanandamide. CP55940 produced PTX-sensitive increases in [Ca2+]i at concentrations>or=15 microM, and PTX-sensitive increases in ERK1/2 phosphorylation. CONCLUSIONS AND IMPLICATIONS This study demonstrates that endogenous CB1 couples to both Gq/11 and Gi/o in hTM cells in an agonist-dependent manner. Cannabinoid activation of multiple CB1 signalling pathways in TM tissue could lead to differential changes in aqueous humour outflow and IOP.
Collapse
Affiliation(s)
- B T McIntosh
- Department of Pharmacology and Laboratory for Retina and Optic Nerve Research, Dalhousie University, Halifax, Nova Scotia, Canada
| | | | | | | | | |
Collapse
|
20
|
|
21
|
Affiliation(s)
- B. Hudson
- a Metallurgy Division , A.E.R.E., Harwell, Didcot , Berks
| | - M. J. Makin
- a Metallurgy Division , A.E.R.E., Harwell, Didcot , Berks
| |
Collapse
|
22
|
|
23
|
Abstract
PURPOSE Significant differences exist in the utilization of emergency eye care services in rural and urban Australia. Meanwhile, influence of internet-based technology in emergency eye care service utilization has not been established. This study aims to demonstrate, from a health provider perspective, an internet-based service's impact on emergency eye care in rural Australia. METHODS The teleophthalmology service was initiated in the Carnarvon Regional Hospital (CRH) of the Gascoyne region in Western Australia. A digital, slit lamp and fundus camera were used for the service. Economic data was gathered from the Department of Health of Western Australia (DOHWA), the CRH and the Lions Eye Institute. RESULTS During the study period (January-December, 2003) 118 persons took part in teleophthalmology consultations. Emergency cases constituted 3% of these consultations. Previous year, there were seven eye-related emergency evacuations (inter-hospital air transfers) from the Gascoyne region to City of Perth. CONCLUSIONS Analysis demonstrates implementation of internet-based health services has a marked impact on rural emergency eye care delivery. Internet is well suited to ophthalmology for the diagnosis and management of acute conditions in remote areas. Integration of such services to mainstream health care is recommended.
Collapse
Affiliation(s)
- S Kumar
- Centre of Excellence in e-Medicine, Lions Eye Institute, The University of Western Australia, Nedlands, Western Australia, Australia. sajeesh@ cyllene.uwa.edu.au
| | | | | | | | | |
Collapse
|
24
|
Fiksel G, Hudson B, Den Hartog DJ, Magee RM, O'Connell R, Prager SC, Beklemishev AD, Davydenko VI, Ivanov AA, Tsidulko YA. Observation of weak impact of a stochastic magnetic field on fast-ion confinement. Phys Rev Lett 2005; 95:125001. [PMID: 16197080 DOI: 10.1103/physrevlett.95.125001] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2005] [Indexed: 05/04/2023]
Abstract
Fast ions are observed to be very well confined in the Madison Symmetric Torus reversed field pinch despite the presence of stochastic magnetic field. The fast-ion energy loss is consistent with the classical slowing down rate, and their confinement time is longer than expected by stochastic estimates. Fast-ion confinement is measured from the decay of d-d neutrons following a short pulse of a 20 keV atomic deuterium beam. Ion confinement agrees with computation of particle trajectories in the stochastic magnetic field, and is understood through consideration of ion guiding center islands.
Collapse
Affiliation(s)
- G Fiksel
- Department of Physics, University of Wisconsin--Madison and Center for Magnetic Self Organization in Laboratory and Astrophysical Plasmas, Madison, Wisconsin 53706, USA
| | | | | | | | | | | | | | | | | | | |
Collapse
|
25
|
Hudson B, Flemming J, Sun G, Rand TG. Comparison of immunomodulator mRNA and protein expression in the lungs of Stachybotrys chartarum spore-exposed mice. J Toxicol Environ Health A 2005; 68:1321-35. [PMID: 16020192 DOI: 10.1080/15287390590953572] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Stachybotrys chartarum is an important toxigenic fungus that has been associated with respiratory disease onset in animals and humans. It can be separated into macrocyclic trichothecene-producing and nonproducing chemotypes based on secondary metabolite production. However, effects of spores of the two chemotypes on lung inflammatory responses are poorly understood. In this study, real-time reverse-transcription polymerase chain reaction (RT-PCR) and enzyme linked immunosorbent assay (ELISA) were used to investigate time-course (1, 3, 6, 24, and 48 h post-instillation [PI]) relationships in mice intratracheally exposed to 300 spores/g body weight of a macrocyclic trichothecene-producing (JS 58-17) and a nonproducing (JS 58-06) S. chartarum isolate and of Cladosporium cladosporioides. There were marked differences in the magnitude and temporal patterns of mouse lung immune responses to intratracheal exposure to spores of these species at this spore dose. Both macrophage inflammatory protein 2 (MIP-2) and surfactant protein-D (SP-D) mRNA expression were significantly upregulated in lungs of JS 58-17-treated animals compared to that of all other treatment animals at 6 and 24 h PI. Heightened mRNA expression of these immunomodulators combined with comparatively depressed MIP-2 and tumor necrosis factor (TNF)-a protein expression suggests that the action of macrocyclic trichothecenes sequestered in 58-17 spores is involved. Interestingly, TNF-a protein expression in all spore treatment animal groups was also significantly increased over that in saline controls. Similarities in expression among all spore treatment animals suggest that chemicals other than toxic secondary metabolites, and possibly spore-sequestered 1,3-beta-D-glucan, may contribute to lung pathogenesis.
Collapse
Affiliation(s)
- B Hudson
- Department of Biology, Saint Mary's University, Halifax, Nova Scotia, Canada
| | | | | | | |
Collapse
|
26
|
Flemming J, Hudson B, Rand TG. Comparison of inflammatory and cytotoxic lung responses in mice after intratracheal exposure to spores of two different Stachybotrys chartarum strains. Toxicol Sci 2004; 78:267-75. [PMID: 14718650 DOI: 10.1093/toxsci/kfh064] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [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] Open
Abstract
Stachybotrys chartarum is an important toxigenic fungus that has been associated with respiratory disease onset in animals and humans. While it can be separated into macrocyclic trichothecene- and atranone-producing chemotypes based on secondary metabolite production, effects of spores of the two chemotypes on lungs are poorly understood. In this study we used bronchoalveolar lavage fluid (BALF) to investigate dose-response (30, 300, 3000 spores/g body weight [BW]) and time-course (3, 6, 24, 48, 96 h post instillation [PI]) relationships in mice to exposure of macrocyclic trichothecene- (JS 58-17) and atranone-producing (JS 58-06) S. chartarum strains, as well as Cladosporium cladosporioides spores. BALF total protein, albumin, pro-inflammatory cytokine (IL-1beta, IL-6, and tumor necrosis factor-alpha [TNF-alpha]), and lactate dehydrogenase (LDH) concentrations showed significant (p < 0.05) fungal species (S. chartarum vs. C. cladosporioides) and strain (58-17 vs. 58-06), spore dose and time dependent changes. The no adverse effect level (NOAEL) due to exposure to spores of JS 58-17 and JS 58-06 was < 30 spores/g BW; for C. cladosporioides it was < 300 spores/g BW. At moderate and high S. chartarum doses, BALF composition reflects differences in strain toxicity while at the lowest dose, BALF composition of either S. chartarum strain were similar. This suggests that at low spore doses, it is spore sequestered factors common to both strains not strain dependent toxins that are contributing to lung disease onset.
Collapse
Affiliation(s)
- J Flemming
- Department of Biology, Saint Mary's University, 923 Robie St., Halifax, Nova Scotia, Canada B3H 3C3
| | | | | |
Collapse
|
27
|
Biewer TM, Forest CB, Anderson JK, Fiksel G, Hudson B, Prager SC, Sarff JS, Wright JC, Brower DL, Ding WX, Terry SD. Electron heat transport measured in a stochastic magnetic field. Phys Rev Lett 2003; 91:045004. [PMID: 12906670 DOI: 10.1103/physrevlett.91.045004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2002] [Indexed: 05/24/2023]
Abstract
New profile measurements have allowed the electron thermal diffusivity profile to be estimated from power balance in the Madison Symmetric Torus where magnetic islands overlap and field lines are stochastic. The measurements show that (1) the electron energy transport is conductive not convective, (2) the measured thermal diffusivities are in good agreement with numerical simulations of stochastic transport, and (3) transport is greatly reduced near the reversal surface where magnetic diffusion is small.
Collapse
Affiliation(s)
- T M Biewer
- Department of Physics, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
28
|
|
29
|
|
30
|
|
31
|
Engel V, Staemmler V, Vander Wal RL, Crim FF, Sension RJ, Hudson B, Andresen P, Hennig S, Weide K, Schinke R. Photodissociation of water in the first absorption band: a prototype for dissociation on a repulsive potential energy surface. ACTA ACUST UNITED AC 2002. [DOI: 10.1021/j100187a007] [Citation(s) in RCA: 183] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
32
|
Mackay DC, Hudson B, Williams JR. Which primary shoulder and elbow replacement? A review of the results of prostheses available in the UK. Ann R Coll Surg Engl 2001; 83:258-65. [PMID: 11518374 PMCID: PMC2503388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2023] Open
Abstract
To assist surgeons select a suitable prosthesis, we have undertaken a detailed review of all shoulder and elbow replacements currently marketed in the UK. Twenty shoulder and 8 elbow implants, manufactured by 16 companies, have been identified. Twelve of the shoulder and one of the elbow implants have been introduced or modified in the last 8 years and have no clinical results published in peer-reviewed journals. Only the Biomodular, Bipolar, Copeland, Isoelastic, Neer hemi, Neer II, Roper-Day and Select shoulders accounting for less than 40% of the UK shoulder market, possess published results. The Capitello-condylar, Coonrad-Morrey, GSB III, Kudo, Liverpool, Roper-Tuke and Souter-Strathclyde elbows all have published results. These account for over 95% of all UK elbow replacements. The implications of these findings in an era of evidence-based medicine is discussed. Reviewing the clinical results should be of primary importance in the selection of a suitable prosthesis. Implants with a proven long-term record must represent the 'gold standard'. New or modified implants should only be used if they are part of a properly conducted clinical trial.
Collapse
Affiliation(s)
- D C Mackay
- Department of Orthopaedic Surgery, Freeman Hospital, Newcastle upon Tyne, UK
| | | | | |
Collapse
|
33
|
Hudson B, Lewis H. PCG boards. Social climbers. Health Serv J 1999; 109:28-9. [PMID: 10662329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
A national survey of PCG chief executives and social services representatives on PCG boards showed that most consider the social services role 'very useful'. Most social services representatives spent two to four days a month on PCG business. Two-thirds felt they needed more time. Almost half felt they had little or no support. Better feedback mechanisms are needed for social services representatives.
Collapse
Affiliation(s)
- B Hudson
- Nuffield Institute for Health, Leeds University
| | | |
Collapse
|
34
|
Hann M, Hudson B, Lewell X, Lifely R, Miller L, Ramsden N. Strategic pooling of compounds for high-throughput screening. J Chem Inf Comput Sci 1999; 39:897-902. [PMID: 10529988 DOI: 10.1021/ci990423o] [Citation(s) in RCA: 162] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Bringing new medicines to the market depends on the rapid discovery of new and effective drugs, often initiated through the biological testing of many thousands of compounds in high-throughput screening (HTS). Mixing compounds together into pools for screening is one way to accelerate this process and reduce costs. This paper contains both theoretical and experimental data which suggest that careful selection of compounds to be pooled together is necessary in order to reduce the risk of reactivity between compounds within the pools.
Collapse
Affiliation(s)
- M Hann
- Department of Biomolecular Structure, Glaxo Wellcome Research and Development, Medicines Research Centre, Stevenage, Hertfordshire, U.K
| | | | | | | | | | | |
Collapse
|
35
|
Hudson B. Joint working. Prospects of partnership. Health Serv J 1998; 108:26-7. [PMID: 10179659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Abstract
Joint working between organisations and professions is a key part of many of this government's initiatives, including health action zones. To work effectively together, professionals must overcome the problems of different cultures and different patterns of accountability. Teamworking across the boundaries of health and social care is generally inadequate.
Collapse
Affiliation(s)
- B Hudson
- Nuffield Institute for Health, Leeds University
| |
Collapse
|
36
|
Hudson B. Joint working. Take your partners. Health Serv J 1998; 108:30-1. [PMID: 10176467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Abstract
The white paper proposals for partnerships in the NHS of the future are much less developed than those for performance. It is unclear whether collaborative activities are discretionary or mandatory. Effective inter-agency co-operation will require central government to give joint working a higher priority.
Collapse
Affiliation(s)
- B Hudson
- Nuffield Institute for Health, Leeds University, UK
| |
Collapse
|
37
|
Kinasewitz G, Fine D, Good TD, Eaton B, Silva F, Hudson B. Seventy-year-old man with pulmonary problems and renal failure: a clinicopathologic correlation conference from the University of Oklahoma College of Medicine. J Okla State Med Assoc 1997; 90:431-41. [PMID: 9816389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Affiliation(s)
- G Kinasewitz
- Department of Pathology, University of Oklahoma College of Medicine, Oklahoma City 73190, USA
| | | | | | | | | | | |
Collapse
|
38
|
Hudson B. Joint working. Local differences. Health Serv J 1997; 107:31-3. [PMID: 10173468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Abstract
The interface between social care and primary healthcare remains underdeveloped. Where joint working is effective, it is the result of co-operation, trust and mutual respect. Successful local networks take account of professional autonomy.
Collapse
Affiliation(s)
- B Hudson
- Nuffield Institute for Health, Leeds University, UK
| |
Collapse
|
39
|
Hudson B. Health purchasing. Waiting in the wings. Health Serv J 1997; 107:34-5. [PMID: 10184702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Affiliation(s)
- B Hudson
- Nuffield Institute for Health, Leeds University, UK
| |
Collapse
|
40
|
Hudson B. Children's services. The youth of today. Health Serv J 1997; 107:24-5. [PMID: 10164570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
Abstract
Few authorities have joint commissioning of mental health services for children and adolescents. But the introduction of children's services plans in April offers an important opportunity, argues Bob Hudson.
Collapse
Affiliation(s)
- B Hudson
- Nuffield Institute for Health, Leeds University, UK
| |
Collapse
|
41
|
Abstract
OBJECTIVE Evaluation of a short latency component (SLC) observed in profoundly deaf young children during recordings of the auditory brain stem response (ABR) before cochlear implantation. DESIGN Seventy young children (ages 2 to 11 yr) were investigated as part of their routine audiologic and diagnostic assessment, before cochlear implantation. The ABR was evoked using click stimuli and tone pips (500 Hz and 1 kHz) at intensity levels up to 105 dB nHL. The incidence of the SLC arising at a latency of 3 msec with high level click stimuli, in addition to residual ABR waves, was assessed. RESULTS An SLC was observed in a total of 18 of the 70 children investigated. It was present in 15 out of 31 congenitally deaf children (48%) compared with only 2 out of 33 children deafened after meningitis (6%). A chi-squared test employing a 2 x 2 contingency table shows that this dependency on etiology of deafness is highly statistically significant (p < 0.001). The presence of the SLC in the congenitally deaf children is related to age at the time of the Electric Response Audiometry test and is more likely to be observed in the younger child (p < 0.01). CONCLUSIONS Interpretation of the ABR in profoundly deaf children should take into consideration the possible presence of the SLC. An evoked potential arising from stimulation of the vestibular system, particularly the vestibular nuclei, is proposed as a likely origin for this component. Damage to sensory cells in the vestibular portion of the labyrinth might explain why an SLC is seen rarely in cases of deafness after meningitis.
Collapse
Affiliation(s)
- S Mason
- Medical Physics Department, Queen's Medical Centre, Nottingham, United Kingdom
| | | | | |
Collapse
|
42
|
Hudson B. Community care. Nobody's baby? Health Serv J 1996; 106:26-7. [PMID: 10162637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Affiliation(s)
- B Hudson
- Nuffield Institute for Health, Leeds University, UK
| |
Collapse
|
43
|
Hudson B. Community care. Health, housing, hiatus. Health Serv J 1996; 106:30-1. [PMID: 10172656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Affiliation(s)
- B Hudson
- Nuffield Institute for Health, Leeds University, UK
| |
Collapse
|
44
|
Abstract
Rickettsiae were isolated by cell culture of buffy coat blood from six patients with spotted fever from southeastern Australia and Flinders Island in Bass Strait. The isolates were genetically compared with two previous Rickettsia australis patient isolates. The genus-specific 17-kDA genes from the isolates were compared after DNA amplification and restriction fragment analysis of the amplified DNA. This comparison revealed that mainland rickettsial isolates from southeastern Australia were identical to two previous isolates of R. australis from northeastern Australia. Rickettsial isolates from Flinders Island were distinct from the mainland isolates. The 16S rRNA gene sequences from the isolates were determined and compared. The Flinders Island rickettsial agent was most closely related (0.3% structural divergence) to Rickettsia rickettsii, Rickettsia conorii, and Rickettsia slovaca. The Flinders Island rickettsial agent was 1.3 and 2.1% structurally divergent from R. australis and Rickettsia akari, respectively. The 16S rRNA gene sequence from the Flinders Island agent shows that this rickettsia is more closely related to the rickettsial spotted fever group than is R. australis. We conclude that there are two populations of spotted fever group rickettsiae in Australia and propose that the genetically distinct causative organism of Flinders Island spotted fever be designated Rickettsia honei. The extent of distribution and animal host reservoirs remain to be elucidated.
Collapse
Affiliation(s)
- R W Baird
- Microbiology Department, Melbourne Pathology, Collingwood, Victoria, Australia
| | | | | | | | | | | | | |
Collapse
|
45
|
Hudson B. Joint commissioning. Jointly or severally? Health Serv J 1996; 106:26-7. [PMID: 10157957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Affiliation(s)
- B Hudson
- Nuffield Institute for Health, Leeds University, UK
| |
Collapse
|
46
|
Hudson B. Community care. Could do better. Health Serv J 1995; 105:30-1. [PMID: 10153888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
Affiliation(s)
- B Hudson
- Nuffield Institute for Health, Leeds University, UK
| |
Collapse
|
47
|
Hudson B. Long-term care. Nothing ventured, nothing gained. Health Serv J 1995; 105:26-7. [PMID: 10152908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Affiliation(s)
- B Hudson
- Nuffield Institute for Health, Leeds University, UK
| |
Collapse
|
48
|
Hudson B. Community care. What price care? Health Serv J 1995; 105:24-5. [PMID: 10145111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
|
49
|
Hudson B. Locality commissioning. A little local difficulty. Health Serv J 1995; 105:24-5. [PMID: 10143902] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
|
50
|
Hudson B. Developing-country travel and endemic diseases. Aust Fam Physician 1994; 23:1666, 1669-73, 1676-7. [PMID: 7980166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Australians increasingly travel to developing countries for holiday and business and encounter new health risks that arise from changes in lifestyle, climate, geography or cultures, and exposure to infectious agents. Rare exotic tropical infections are possible but uncommon.
Collapse
Affiliation(s)
- B Hudson
- Royal North Shore Hospital, Sydney
| |
Collapse
|