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Fitch S, Blanchette A, Haws LC, Franke K, Ring C, DeVito M, Wheeler M, Walker N, Birnbaum L, Van Ede KI, Antunes Fernandes EC, Wikoff DS. Systematic update to the mammalian relative potency estimate database and development of best estimate toxic equivalency factors for dioxin-like compounds. Regul Toxicol Pharmacol 2024; 147:105571. [PMID: 38244664 PMCID: PMC11059105 DOI: 10.1016/j.yrtph.2024.105571] [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: 05/02/2023] [Revised: 11/22/2023] [Accepted: 01/17/2024] [Indexed: 01/22/2024]
Abstract
The World Health Organization (WHO) assesses potential health risks of dioxin-like compounds using Toxic Equivalency Factors (TEFs). This study systematically updated the relative potency (REP) database underlying the 2005 WHO TEFs and applied advanced methods for quantitative integration of study quality and dose-response. Data obtained from fifty-one publications more than doubled the size of the previous REP database (∼1300 datasets). REP quality and relevance for these data was assessed via application of a consensus-based weighting framework. Using Bayesian dose-response modeling, available data were modeled to produce standardized dose/concentration-response Hill curves. Study quality and REP data were synthesized via Bayesian meta-analysis to integrate dose/concentration-response data, author-calculated REPs and benchmark ratios. The output is a prediction of the most likely relationship between each congener and its reference as model-predicted TEF uncertainty distributions, or the 'best estimate TEF' (BE-TEF). The resulting weighted BE-TEFs were similar to the 2005 TEFs, though provide more information to inform selection of TEF values as well as to provide risk assessors and managers with information needed to quantitatively characterize uncertainty around TEF values. Collectively, these efforts produce an updated REP database and an objective, reproducible approach to support development of TEF values based on all available data.
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Affiliation(s)
- S Fitch
- ToxStrategies, Katy, TX, USA.
| | | | | | - K Franke
- ToxStrategies, Asheville, NC, USA
| | - C Ring
- ToxStrategies, Austin, TX, USA
| | - M DeVito
- Environmental Protection Agency, Center for Computational Toxicology and Exposure, Research Triangle Park, NC, USA
| | - M Wheeler
- National Institute of Environmental Health Sciences/National Institutes of Health, Research Triangle Park, NC, USA
| | - N Walker
- National Institute of Environmental Health Sciences/National Institutes of Health, Research Triangle Park, NC, USA
| | - L Birnbaum
- National Institute of Environmental Health Sciences, Research Triangle Park, NC, USA; Nicholas School of the Environment, Duke University, Durham, NC, USA
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Secker S, Holmes H, Warren D, Avula S, Bhattacharya D, Choi S, Likeman M, Liu A, Mitra D, Oates A, Pearce K, Wheeler M, Mankad K, Batty R. Review of standard paediatric neuroradiology MRI protocols from 12 UK tertiary paediatric hospitals: is there much variation between centres? Clin Radiol 2023; 78:e941-e949. [PMID: 37788968 DOI: 10.1016/j.crad.2023.08.021] [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: 03/28/2023] [Revised: 08/12/2023] [Accepted: 08/21/2023] [Indexed: 10/05/2023]
Abstract
AIM To investigate how magnetic resonance imaging (MRI) examinations are protocolled in tertiary paediatric neuroradiology centres around the UK for some of the more common presentations encountered in paediatric neuroradiology, and to identify any variations of note. MATERIALS AND METHODS All 19 UK tertiary paediatric neuroradiology centres registered with the British Society of Neuroradiologists-Paediatric Group were contacted and asked if they could provide a copy of their standard MRI protocols. Twelve responded (63%) and 10 of the more common presentations were selected and the standard acquired sequences obtained at each participating centre were compared. Where available the collated protocols were also compared against current published guidance. RESULTS The basic sequences carried out by centres around the UK are similar; however, there are lots of variations overall. The only standardised protocol currently being implemented nationally in paediatric imaging is that for brain tumours. Otherwise, chosen protocols are generally dependent on the preferences and technical capabilities of individual centres. Suggested published protocols also exist for non-accidental injury (NAI), multiple sclerosis, epilepsy, and head and neck imaging. CONCLUSIONS The differences in MRI protocolling depend in part on technical capabilities and in part on the experience and preferences of the paediatric neuroradiologists at each centre. For most presentations, there is no consensus as to what constitutes the perfect protocol. The present results will be useful for specialist centres who may wish to review their current protocols, and for more generalist centres to use as a reference to guide their MRI protocolling.
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Affiliation(s)
- S Secker
- Neuroradiology, Sheffield Teaching Hospitals NHS Foundation Trust, Royal Hallamshire Hospital, Broomhall, Sheffield, UK.
| | - H Holmes
- Neuroradiology, Sheffield Teaching Hospitals NHS Foundation Trust, Royal Hallamshire Hospital, Broomhall, Sheffield, UK
| | - D Warren
- Neuroradiology, Leeds Teaching Hospitals NHS Trust, Leeds, UK
| | - S Avula
- Radiology, Alder Hey Children's NHS Foundation Trust, Liverpool, UK
| | - D Bhattacharya
- Neuroradiology, The Royal Belfast Hospital for Sick Children, Belfast, UK
| | - S Choi
- Radiology, Royal Infirmary of Edinburgh, Edinburgh, UK
| | - M Likeman
- Neuroradiology, Bristol Children's Hospital, Bristol, UK
| | - A Liu
- University Hospital of Wales, Cardiff, UK
| | - D Mitra
- Neuroradiology, Great North Children's Hospital, Royal Victoria Infirmary, Newcastle upon Tyne NE1 4LP, UK
| | - A Oates
- Radiology, Birmingham Children's Hospital, Birmingham Women's and Children's NHS Trust, Birmingham, UK
| | - K Pearce
- Neuroradiology, University Hospitals Plymouth NHS Trust, Plymouth, Devon, UK
| | - M Wheeler
- University Hospital of Wales, Cardiff, UK
| | - K Mankad
- Neuroradiology, Great Ormond Street Hospital, London, UK
| | - R Batty
- Neuroradiology, Sheffield Teaching Hospitals NHS Foundation Trust, Royal Hallamshire Hospital, Broomhall, Sheffield, UK
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Liu Y, Huang Y, Liggio J, Hayden K, Mihele C, Wentzell J, Wheeler M, Leithead A, Moussa S, Xie C, Yang Y, Zhang Y, Han T, Li SM. A newly developed Lagrangian chemical transport scheme: Part 1. Simulation of a boreal forest fire plume. Sci Total Environ 2023; 880:163232. [PMID: 37023817 DOI: 10.1016/j.scitotenv.2023.163232] [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] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 03/29/2023] [Accepted: 03/29/2023] [Indexed: 05/27/2023]
Abstract
Forest fire research over the last several decades has improved the understanding of fire emissions and impacts. Nevertheless, the evolution of forest fire plumes remains poorly quantified and understood. Here, a Lagrangian chemical transport model, the Forward Atmospheric Stochastic Transport model coupled with the Master Chemical Mechanism (FAST-MCM), has been developed to simulate the transport and chemical transformations of plumes from a boreal forest fire over several hours since their emission. The model results for NOx (NO and NO2), O3, HONO, HNO3, pNO3 and 70 VOC species are compared with airborne in-situ measurements within plume centers and their surrounding portions during the transport. Comparisons between simulation results and measurements show that the FAST-MCM model can properly reproduce the physical and chemical evolution of forest fire plumes. The results indicate that the model can be an important tool used to aid the understanding of the downwind impacts of forest fire plumes.
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Affiliation(s)
- Yayong Liu
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, China 100871
| | - Yufei Huang
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, China 100871
| | - John Liggio
- Air Quality Research Division, Science and Technology Branch, Environment and Climate Change Canada, Toronto, Ontario M3H 5T4, Canada
| | - Katherine Hayden
- Air Quality Research Division, Science and Technology Branch, Environment and Climate Change Canada, Toronto, Ontario M3H 5T4, Canada
| | - Cris Mihele
- Air Quality Research Division, Science and Technology Branch, Environment and Climate Change Canada, Toronto, Ontario M3H 5T4, Canada
| | - Jeremy Wentzell
- Air Quality Research Division, Science and Technology Branch, Environment and Climate Change Canada, Toronto, Ontario M3H 5T4, Canada
| | - Michael Wheeler
- Air Quality Research Division, Science and Technology Branch, Environment and Climate Change Canada, Toronto, Ontario M3H 5T4, Canada
| | - Amy Leithead
- Air Quality Research Division, Science and Technology Branch, Environment and Climate Change Canada, Toronto, Ontario M3H 5T4, Canada
| | - Samar Moussa
- Air Quality Research Division, Science and Technology Branch, Environment and Climate Change Canada, Toronto, Ontario M3H 5T4, Canada
| | - Conghui Xie
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, China 100871
| | - Yanrong Yang
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, China 100871
| | - Yuheng Zhang
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, China 100871
| | - Tianran Han
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, China 100871
| | - Shao-Meng Li
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, China 100871.
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Hofmeyer M, Haas G, Kransdorf E, Ewald G, Morris A, Owens A, Lowes B, Stoller D, Tang W, Garg S, Trachtenberg B, Shah P, Pamboukian S, Sweitzer N, Wheeler M, Wilcox J, Katz S, Pan S, Jimenez J, Smart F, Wang J, Gottlieb S, Judge D, Moore C, Huggins G, Jordan E, Kinnamon D, Ni H, Hershberger R. Genetic Signature of Dilated Cardiomyopathy Severity: The DCM Precision Medicine Study. J Heart Lung Transplant 2023. [DOI: 10.1016/j.healun.2023.02.1674] [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: 04/05/2023] Open
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Flehr A, Källgård J, Alvén J, Lagerstrand K, Papalini E, Wheeler M, Vandenput L, Kahl F, Axelsson KF, Sundh D, Mysore RS, Lorentzon M. Development of a novel method to measure bone marrow fat fraction in older women using high-resolution peripheral quantitative computed tomography. Osteoporos Int 2022; 33:1545-1556. [PMID: 35113175 PMCID: PMC9187531 DOI: 10.1007/s00198-021-06224-7] [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] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Accepted: 10/26/2021] [Indexed: 11/24/2022]
Abstract
UNLABELLED Bone marrow adipose tissue (BMAT) has been implicated in a number of conditions associated with bone deterioration and osteoporosis. Several studies have found an inverse relationship between BMAT and bone mineral density (BMD), and higher levels of BMAT in those with prevalent fracture. Magnetic resonance imaging (MRI) is the gold standard for measuring BMAT, but its use is limited by high costs and low availability. We hypothesized that BMAT could also be accurately quantified using high-resolution peripheral quantitative computed tomography (HR-pQCT). METHODS In the present study, a novel method to quantify the tibia bone marrow fat fraction, defined by MRI, using HR-pQCT was developed. In total, 38 postmenopausal women (mean [standard deviation] age 75.9 [3.1] years) were included and measured at the same site at the distal (n = 38) and ultradistal (n = 18) tibia using both MRI and HR-pQCT. To adjust for partial volume effects, the HR-pQCT images underwent 0 to 10 layers of voxel peeling to remove voxels adjacent to the bone. Linear regression equations were then tested for different degrees of voxel peeling, using the MRI-derived fat fractions as the dependent variable and the HR-pQCT-derived radiodensity as the independent variables. RESULTS The most optimal HR-pQCT derived model, which applied a minimum of 4 layers of peeled voxel and with more than 1% remaining marrow volume, was able to explain 76% of the variation in the ultradistal tibia bone marrow fat fraction, measured with MRI (p < 0.001). CONCLUSION The novel HR-pQCT method, developed to estimate BMAT, was able to explain a substantial part of the variation in the bone marrow fat fraction and can be used in future studies investigating the role of BMAT in osteoporosis and fracture prediction.
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Affiliation(s)
- Alison Flehr
- Mary McKillop Institute for Health Research, Australian Catholic University, Melbourne, Australia
| | - Julius Källgård
- Sahlgrenska Osteoporosis Centre, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Jennifer Alvén
- Dept. of Molecular and Clinical Medicine, Inst. of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
- Computer Vision and Medical Image Analysis, Dept. of Electrical Engineering, Chalmers University of Technology, Gothenburg, Sweden
| | - Kerstin Lagerstrand
- Medical Physics and Biomedical Engineering, Sahlgrenska University Hospital, Gothenburg, Sweden
- Department of Radiation Physics, Institution of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Evin Papalini
- Sahlgrenska Osteoporosis Centre, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
- Medical Physics and Biomedical Engineering, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Michael Wheeler
- Mary McKillop Institute for Health Research, Australian Catholic University, Melbourne, Australia
| | - Liesbeth Vandenput
- Mary McKillop Institute for Health Research, Australian Catholic University, Melbourne, Australia
- Sahlgrenska Osteoporosis Centre, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Fredrik Kahl
- Department of Electrical Engineering, Chalmers University of Technology, Gothenburg, Sweden
| | - Kristian F Axelsson
- Sahlgrenska Osteoporosis Centre, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
- Region Västra Götaland, Primary Care, Skövde, Sweden
| | - Daniel Sundh
- Sahlgrenska Osteoporosis Centre, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Raghunath Shirish Mysore
- Sahlgrenska Osteoporosis Centre, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Mattias Lorentzon
- Mary McKillop Institute for Health Research, Australian Catholic University, Melbourne, Australia.
- Sahlgrenska Osteoporosis Centre, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
- Region Västra Götaland, Geriatric Medicine, Sahlgrenska University Hospital, Mölndal, Sweden.
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Axelsson KF, Woessner MN, Litsne H, Wheeler M, Flehr A, King AJ, Kalén M, Vandenput L, Lorentzon M. Eating disorders are associated with increased risk of fall injury and fracture in Swedish men and women. Osteoporos Int 2022; 33:1347-1355. [PMID: 35088102 PMCID: PMC9106600 DOI: 10.1007/s00198-022-06312-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Accepted: 01/18/2022] [Indexed: 11/24/2022]
Abstract
UNLABELLED In this retrospective cohort study, men and women with eating disorders (n = 8867) had higher risk of injurious falls and hip fractures than age, sex, and county-matched controls (n = 88670). INTRODUCTION Eating disorders have been associated with decreased bone mineral density and increased fracture risk, but the association with fall injuries without fracture has not previously been investigated. Furthermore, fracture risk in men with eating disorders has been insufficiently studied. METHODS In the present study, 8867 patients (9.4% men) with a diagnosed eating disorders and 88670 age-, sex-, and county-matched controls were investigated. RESULTS The mean (standard deviation) age of the patients and controls was 41.6 (13.7) years and the follow-up time 9.6 (5.2, 14.4) years (median, interquartile range) for patients and 10.1 (5.5, 14.2) years for controls. The proportions of injurious falls without fracture (17.3% vs. 9.0%) and of hip fracture (1.6% vs. 0.7%) were substantially greater in patients with an eating disorder than in their corresponding population controls. In an unadjusted Cox proportional hazards model, individuals with an eating disorder had a higher risk of injurious falls without fracture (Hazard ratio (HR) 95% confidence interval (CI): 2.07 (1.96-2.18), and hip fracture (HR 2.30 (1.92-2.75)) than the risk observed in the controls. The HR for any investigated outcome associated with an eating disorder did not differ by sex or age (interaction term p > 0.10). The risk of injurious falls without fracture and hip fracture was increased in both women (HR 2.07 (1.95-2.19) and HR 2.41 (1.98-2.93), respectively) and men (HR 2.09 (1.76-2.49) and HR 1.84(1.12-3.02), respectively), with an eating disorder. CONCLUSION The risk of injurious falls without fracture and of hip fracture is increased in both women and men with eating disorders, indicating measures to prevent both falls and fractures are important in these patients, regardless of age and sex.
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Affiliation(s)
- K F Axelsson
- Sahlgrenska Osteoporosis Centre, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
- Region Västra Götaland, Närhälsan Norrmalm Health Centre, Skövde, Sweden
| | - M N Woessner
- Institute for Health and Sport (IHES), Victoria University, Melbourne, Australia
| | - H Litsne
- Sahlgrenska Osteoporosis Centre, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - M Wheeler
- Mary McKillop Institute for Health Research, Australian Catholic University, Melbourne, Australia
| | - A Flehr
- Mary McKillop Institute for Health Research, Australian Catholic University, Melbourne, Australia
| | - A J King
- Mary McKillop Institute for Health Research, Australian Catholic University, Melbourne, Australia
| | - M Kalén
- Region Västra Götaland, Department of Psychiatry, Skaraborgs Hospital, Skövde, Sweden
| | - L Vandenput
- Sahlgrenska Osteoporosis Centre, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
- Mary McKillop Institute for Health Research, Australian Catholic University, Melbourne, Australia
| | - M Lorentzon
- Sahlgrenska Osteoporosis Centre, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
- Mary McKillop Institute for Health Research, Australian Catholic University, Melbourne, Australia.
- Region Västra Götaland, Geriatric Medicine, Sahlgrenska University Hospital, Mölndal, Building K, 6th Floor, 431 80, Mölndal, Sweden.
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Andersen B, Wheeler M, Li Z, Chiocca EA, Reardon D, Quintana F. TAMI-35. DETECTING SINGLE-CELL INTERACTIONS IN ORGANOTYPIC CULTURES OF GLIOBLASTOMA USING BARCODED RABIES VIRUS. Neuro Oncol 2021. [DOI: 10.1093/neuonc/noab196.819] [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] Open
Abstract
Abstract
Cell-cell interactions are thought to drive tumor-promoting signals in the microenvironment of glioblastoma, but standard approaches for single cell analysis do not directly identify cell interactions and the mechanisms that mediate them. We recently developed a novel method to analyze cell-cell interactions—rabies barcode interaction detection followed by sequencing (RABID-seq), which combines barcoded viral tracing and single-cell RNA sequencing (scRNAseq). RABID-seq was first implemented in transgenic mice to investigate the interactions of astrocytes with other cells in the CNS enabling the study of astrocyte connectome perturbations and candidate therapeutic targets in multiple sclerosis and its pre-clinical model, experimental autoimmune encephalomyelitis (EAE). Here, we report the first use of RABID-seq in human tissues in organotypic cultures established from three IDH-wildtype glioblastoma (GBM) patients. In organotypic GBM cultures, initial infection by pseudotyped barcoded rabies virus deficient for viral glycoprotein was achieved after previous culture transduction with a lentivirus containing the avian TVA receptor and rabies glycoprotein under the human EF1a promoter. We employed this system to initially infect approximately 1,000 malignant or non malignant cells in the tumor microenvironment. After five days, infected cells were isolated from cultures and processed for single cell analysis using SMART seq. We were able to capture at least 6,000 interacting cells per tumor specimen, from which barcodes were recovered and cDNA was sent for sequencing. Here we present connectomic data from our initial cohort of three glioblastoma patients as an introduction to RABID-seq, with a focus on astrocyte-tumor interactions. Candidate mechanisms of cellular interactions will undergo functional validation in murine models of glioblastoma.
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Affiliation(s)
| | | | - Zhaorong Li
- Brigham and Women's Hospital, Boston, MA, USA
| | - E Antonio Chiocca
- Harvey Cushing Neuro-oncology Laboratories, Department of Neurosurgery, Brigham & Women's Hospital, Harvard Medical School, Boston, MA, USA, Boston, MA, USA
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Wheeler M, Guterres S, Bewley AP, Thompson AR. An analysis of qualitative responses from a UK survey of the psychosocial wellbeing of people with skin conditions and their experiences of accessing psychological support. Clin Exp Dermatol 2021; 47:37-42. [PMID: 34160837 DOI: 10.1111/ced.14815] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 06/09/2021] [Accepted: 06/21/2021] [Indexed: 01/18/2023]
Abstract
BACKGROUND Skin conditions have a large emotional, psychological and psychiatric impact on the individual. The All-Party Parliamentary Group on Skin (APPGS) commissioned a qualitative survey to further explore this relationship alongside the experiences of those accessing services in relation to these difficulties in the UK. AIM To examine the experiences of UK individuals living with a skin condition, and their views of seeking and receiving psychological treatment. This survey formed part of the evidence collected in the preparation of the APPGS Mental Health and Skin Disease report. METHODS A free-text electronic survey was widely distributed by professional bodies and skin-related charities. Responses were analysed using descriptive thematic analysis and descriptive statistics. Data for each question were classified and labelled, leading to the development of a coding frame. Inter-rater reliability was assessed using Cohen kappa statistic. RESULTS In total, 544 participants (84% female) completed the survey. The majority of respondents had inflammatory skin diseases such as eczema (43%) or psoriasis (33%). The thematic analysis revealed five key themes associated with impact on mood; impact of intimacy; impact on activities of daily living; lack of recognition from others of the impact; and lack of accessible services. CONCLUSION The survey demonstrates that there is an urgent need to improve both awareness of the impact that skin conditions can have, and for the provision of psychological services to address this impact.
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Affiliation(s)
- M Wheeler
- South Wales Clinical Psychology Training Programme, School of Psychology, Cardiff University and Cardiff and Vale University Health Board, Cardiff, UK
| | - S Guterres
- All-Party Parliamentary Group on Skin, Niddry Lodge, London, UK
| | - A P Bewley
- The Royal London Hospital and Whipps Cross University Hospitals NHS Trust, Barts Health NHS Trust and Queen Mary University, London, UK
| | - A R Thompson
- South Wales Clinical Psychology Training Programme, School of Psychology, Cardiff University and Cardiff and Vale University Health Board, Cardiff, UK
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Ruygrok P, McGrinder H, Wheeler M, Doughty R. The Atrial Flow Regulator – A Novel Treatment Strategy for Patients With HFpEF. Heart Lung Circ 2021. [DOI: 10.1016/j.hlc.2021.05.045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Earle N, Winbo A, Crawford J, Wheeler M, Stiles R, Donoghue T, Stiles M, Hayes I, Marcondes L, Martin A, Skinner J. Significance of the Carriage of Sarcomeric Mutations in Hypertrophic Cardiomyopathy in New Zealand. Heart Lung Circ 2021. [DOI: 10.1016/j.hlc.2021.05.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Abstract
AbstractThe Turing Test is routinely understood as a behaviourist test for machine intelligence. Diane Proudfoot (Rethinking Turing’s Test, Journal of Philosophy, 2013) has argued for an alternative interpretation. According to Proudfoot, Turing’s claim that intelligence is what he calls ‘an emotional concept’ indicates that he conceived of intelligence in response-dependence terms. As she puts it: ‘Turing’s criterion for “thinking” is…: x is intelligent (or thinks) if in the actual world, in an unrestricted computer-imitates-human game, x appears intelligent to an average interrogator’. The role of the famous test is thus to provide the conditions in which to examine the average interrogator’s responses. I shall argue that Proudfoot’s analysis falls short. The philosophical literature contains two main models of response-dependence, what I shall call the transparency model and the reference-fixing model. Proudfoot resists the thought that Turing might have endorsed one of these models to the exclusion of the other. But the details of her own analysis indicate that she is, in fact, committed to the claim that Turing’s account of intelligence is grounded in a transparency model, rather than a reference-fixing one. By contrast, I shall argue that while Turing did indeed conceive of intelligence in response-dependence terms, his account is grounded in a reference-fixing model, rather than a transparency one. This is fortunate (for Turing), because, as an account of intelligence, the transparency model is arguably problematic in a way that the reference-fixing model isn’t.
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Abstract
CASE We present a case of a 60-year-old polytraumatized man who developed postoperative pyoderma gangrenosum (PG) after his initial stabilization procedures, mimicking a postoperative infection. This caused a delay in diagnosis, leading to progression of his wounds and a delay in initiation of the appropriate treatment. Once his PG was appropriately treated, his clinical status and wounds improved. He underwent successful wound coverage by plastic surgery and has been recovering from his injuries. CONCLUSION Prompt identification and initiation of treatment for postoperative PG is critical to avoid exacerbation of wounds and subsequent morbidity to the patient.
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Affiliation(s)
- Skyler Hoelscher
- 1Department of Orthopaedic Surgery, JPS Health Network, Fort Worth, Texas
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Saavedra C, Alsamarrai A, Bryce A, Ross MA, Wheeler M. A083 Infective Endocarditis in Rheumatic versus non-Rheumatic Heart Disease: The Auckland Hospital Experience. Heart Lung Circ 2020. [DOI: 10.1016/j.hlc.2020.05.088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Tremblay-Gravel M, Malhamé I, Avram R, Gravel GM, Desplantie O, Pacheco C, Moayedi Y, Moscarello T, Ducharme A, Ashley E, Jolicoeur M, Wheeler M, Khandelwal A. OUTCOMES OF AFRICAN AMERICAN VS. NON-AFRICAN AMERICAN WOMEN WITH PERIPARTUM CARDIOMYOPATHY: A COMPARISON ANALYSIS BETWEEN CANADIAN AND UNITED STATES COHORTS. Can J Cardiol 2019. [DOI: 10.1016/j.cjca.2019.07.424] [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
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Alexander K, Barrett C, Dobos K, Cheng P, Liao R, Wheeler M, Liedtke M, Weisshaar D, Witteles R. Contemporary Outcomes in Patients with Cardiac Amyloidosis Undergoing Heart Transplantation. J Heart Lung Transplant 2019. [DOI: 10.1016/j.healun.2019.01.524] [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
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Duclos S, Matsuda K, Jimenez S, Wheeler M, Sallam K, Hiesinger W, Banerjee D. Contemporary Use of Glycoprotein IIb/IIIa Inhibitors in Patients with Left Ventricular Assist Devices. J Heart Lung Transplant 2019. [DOI: 10.1016/j.healun.2019.01.1079] [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: 11/16/2022] Open
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O'Donoghue G, Kennedy A, Andersen GS, Carr B, Cleary S, Durkan E, Davis H, Færch K, Fitzpatrick P, Kenny H, McCaffrey N, Monedero J, Murphy E, Noone J, Suvitaival T, Thybo T, Wheeler M, Vistisen D, Nolan JJ, O'Gorman DJ. Phenotypic Responses to a Lifestyle Intervention Do Not Account for Inter-Individual Variability in Glucose Tolerance for Individuals at High Risk of Type 2 Diabetes. Front Physiol 2019; 10:317. [PMID: 30971951 PMCID: PMC6443958 DOI: 10.3389/fphys.2019.00317] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [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: 11/05/2018] [Accepted: 03/07/2019] [Indexed: 01/17/2023] Open
Abstract
Background: Lifestyle interventions have been shown to delay or prevent the onset of type 2 diabetes among high risk adults. A better understanding of the variability in physiological responses would support the matching of individuals with the best type of intervention in future prevention programmes, in order to optimize risk reduction. The purpose of this study was to determine if phenotypic characteristics at baseline or following a 12 weeks lifestyle intervention could explain the inter-individual variability in change in glucose tolerance in individuals with high risk for type 2 diabetes. Methods: In total, 285 subjects with normal glucose tolerance (NGT, FINDRISC score > 12), impaired fasting glucose (IFG) and impaired glucose tolerance (IGT) were recruited for a 12 weeks lifestyle intervention. Glucose tolerance, insulin sensitivity, anthropometric characteristics and aerobic fitness were measured. Variability of responses was examined by grouping participants by baseline glycemic status, by cluster analysis based on the change in glucose tolerance and by Principal Component Analysis (PCA). Results: In agreement with other studies, the mean response to the 12 weeks intervention was positive for the majority of parameters. Overall, 89% improved BMI, 80% waist circumference, and 81% body fat while only 64% improved fasting plasma glucose and 60% 2 h glucose. The impact of the intervention by glycaemic group did not show any phenotypic differences in response between NGT, IFG, and IGT. A hierarchical cluster analysis of change in glucose tolerance identified four sub-groups of "responders" (high and moderate) and "non-responders" (no response or deteriorated) but there were few differences in baseline clincal and physiological parameters or in response to the intervention to explain the overall variance. A further PCA analysis of 19 clinical and physiological univariables could explain less than half (48%) of total variability. Conclusion: We found that phenotypic characteristics from standard clinical and physiological parameters were not sufficient to account for the inter-individual variability in glucose tolerance following a 12 weeks lifestyle intervention in inidivuals at high risk for type 2 diabetes. Further work is required to identify biomarkers that complement phenotypic traits and better predict the response to glucose tolerance.
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Affiliation(s)
- Grainne O'Donoghue
- School of Health and Human Performance, Dublin City University, Dublin, Ireland.,Steno Diabetes Center Copenhagen, Gentofte, Denmark
| | - Aileen Kennedy
- School of Health and Human Performance, Dublin City University, Dublin, Ireland
| | | | | | - Stephen Cleary
- School of Health and Human Performance, Dublin City University, Dublin, Ireland
| | - Eoin Durkan
- School of Health and Human Performance, Dublin City University, Dublin, Ireland
| | - Heidi Davis
- School of Health and Human Performance, Dublin City University, Dublin, Ireland
| | | | - Paula Fitzpatrick
- School of Health and Human Performance, Dublin City University, Dublin, Ireland
| | - Helena Kenny
- School of Health and Human Performance, Dublin City University, Dublin, Ireland
| | - Noel McCaffrey
- School of Health and Human Performance, Dublin City University, Dublin, Ireland
| | - Javier Monedero
- School of Health and Human Performance, Dublin City University, Dublin, Ireland
| | - Enda Murphy
- School of Health and Human Performance, Dublin City University, Dublin, Ireland
| | - John Noone
- School of Health and Human Performance, Dublin City University, Dublin, Ireland
| | | | - Tanja Thybo
- Steno Diabetes Center Copenhagen, Gentofte, Denmark
| | - Michael Wheeler
- School of Health and Human Performance, Dublin City University, Dublin, Ireland
| | | | - John J Nolan
- Steno Diabetes Center Copenhagen, Gentofte, Denmark.,Trinity College Dublin, Dublin, Ireland
| | - Donal J O'Gorman
- School of Health and Human Performance, Dublin City University, Dublin, Ireland.,National Institute for Cellular Biotechnology, Dublin City University, Dublin, Ireland
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Salerno F, Rubessa M, Gasparrini B, Wheeler M. 28 Effect of deuterium oxide on bovine oocyte cryotolerance. Reprod Fertil Dev 2019. [DOI: 10.1071/rdv31n1ab28] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
It is known that cryopreservation triggers spindle disassembly, increased aneuploidy risk, decreased post-thaw survival, fertilization, and embryo development. We hypothesised that a treatment with D2O before vitrification would slow down oocyte metabolism and reduce ice crystal formation by replacing water inside the cells. The aim of the study was to evaluate the effect of a 4-h treatment with different D2O concentrations (0, 3, 15, and 30%) on cryotolerance of bovine in vitro-matured oocytes. Abattoir-derived bovine oocytes were matured in vitro for 20h in TCM-199 medium with 15% of bovine serum (BS), 0.5µg mL−1 of FSH, 5µg mL−1 of LH, 0.8mM l-glutamine, and 50µg mL−1 of gentamicin at 39°C with 5% of CO2 and randomly divided into 5 experimental groups. A group of non-vitrified oocytes was used as the fresh oocyte control group, whereas the remaining oocytes were incubated for 4h in in vitro maturation medium with 0% (vitrified control; n=205), 3% (n=205), 15% (n=205), and 30% D2O (n=205) before vitrification. The experiment was repeated 4 times. Oocytes were denuded in HEPES-buffered TCM-199 (H199)+5% BS and vitrified using a cryotop freezing straw. The oocytes were incubated in 200μL of H199+20% BS with 7.5% ethylene glycol and 7.5% dimethyl sulfoxide for 3min. After that, oocytes were collected in 50μL of H199+20% fetal bovine serum with 15% ethylene glycol+15% dimethyl sulfoxide and 0.5M sucrose for 20s and plunged into LN2. One month later, oocytes were warmed in thawing media with decreasing concentrations of sucrose (1.35M to 0.31M) and then placed into in vitro maturation medium for 2h before IVF. Matured oocytes were IVF and cultured according to standard procedures (Rubessa et al. 2011 Theriogenology 76, 1347-1355). Cleavage and blastocyst rates were evaluated after 7 days of culture. Data were analysed using the GLM procedure of SPSS (SPSS Inc., Chicago, IL, USA). The least statistical difference post-hoc test was used to perform statistical multiple comparison. The α-level was set at 0.05. As expected, both cleavage [60.5±4.6 (fresh control); 36.9±2.6 (0% D2O); 46.3±3.7 (3% D2O); 31.6±2.4 (15% D2O); and 24.4±2.6 (30% D2O)] and blastocyst rates [25.7±0.8 (fresh control); 9.0±0.8 (0% D2O); 9.0±0.7 (3% D2O); 3.6±0.2 (15% D2O); and 4.3±0.8 (30% D2O)] decreased in all vitrified groups compared with the fresh control group. Within vitrified oocytes, cleavage rate increased (P<0.05) with 3% D2O treatment compared with the other groups. However, pretreatment with higher (15-30%) D2O concentrations decreased (P<0.05) blastocyst rates of vitrified-warmed oocytes. In conclusion, a pretreatment with low concentrations (3%) of D2O improved the cleavage rate of bovine vitrified-warmed oocytes, suggesting a potential beneficial effect, whereas deleterious effects were observed using the higher concentrations. Therefore, further studies are required to assess a potential use of D2O to improve oocyte cryotolerance, likely testing different incubation times.
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Siegel L, Bane T, Bertels J, Ratz K, Rubessa M, Wheeler M. 184 Effect of selenium on the differentiation of porcine adipose-derived stem cells into osteoblasts. Reprod Fertil Dev 2019. [DOI: 10.1071/rdv31n1ab184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Bone damage is a common occurrence and although traditional bone healing methods work well, they are not always able to fix all issues pertaining to the injury. However, recent research on stem cell therapies using adipose-derived stem cells (ASC) has shown that ASC that differentiate into osteoblasts can be used as a potentially better solution for bone injuries. Selenium is a nutritional trace element that has been found to be essential in the production of selenoproteins and bone growth. Selenium plays an integral role in osteoblast cell differentiation and proliferation. The aim of this experiment was to test whether adding selenium to osteogenic influences the differentiation potential of ASC into osteoblasts. Porcine ASC were isolated as described (Monaco et al. 2009, Open Tissue Eng. Regen. Med. J. 2, 20-33). Seven different treatments were given to the cells: a negative control of DMEM, a positive control of osteogenic medium, and 5 concentrations of selenium in the osteogenic medium (10, 5, 1, 0.5, and 0.1 µM). Medium was changed twice a week for 4 weeks, at the end of which the cells were stained with Alizarin Red S stain. The number of osteoblastic nodules in each well were counted and divided into the categories of “forming” and “formed.” A generalized linear model (GLM) procedure (SPSS Inc./IBM Corp., Chicago, IL, USA) was used to analyse the data. The least statistical difference (l.s.d.) post hoc test was used to perform statistical multiple comparison with an α-level of 0.05. The results showed (Table 1) that medium containing selenium concentrations of 0.1, 0.5, and 1.0 µM were able to develop more nodules than the osteogenic medium. There was no statistical difference in the total amount of forming and formed nodules in those 4 groups; however, there was a statistical tendency for a difference (P=0.06) between the medium with 1 µM selenium and the osteogenic medium. Medium containing 10 or 5 µM selenium had lower nodule counts (both forming and formed) than osteogenic medium. There was no statistical difference between 10 µM and DMEM. These results suggest that low concentrations of selenium have a positive effect on nodule formation, whereas higher concentrations are detrimental.
Table 1.The average number (standard deviations in parentheses) of formed, forming, and total osteoblastic nodules in each of the different treatments
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Bane T, Siegel L, Bertels J, Ratz K, Rubessa M, Wheeler M. 208 The effect of copper on the differentiation of adipose-derived stem cells into osteoblasts. Reprod Fertil Dev 2019. [DOI: 10.1071/rdv31n1ab208] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Large bone defects present a tremendous challenge to the treating surgeon. Tissue engineering using scaffolds of various sizes and shapes that contain stem cells and other osteoinductive molecules offer a potential solution to this difficult problem. The aim of this project was to evaluate whether osteogenic medium infused with copper influences the differentiation of adipose-derived stem cells (ASC) into osteoblasts. Copper is a key cofactor for lysyl oxidase, an enzyme involved in producing a collagen matrix through which bone can grow. Lysyl oxidase expression is up-regulated in bone marrow stromal cells (Khosravi et al. 2014 PLoS One 9, e100669). Our hypothesis was that the presence of copper in the osteogenic medium would positively influence the number of osteoblastic nodules formed. Swine ASC were isolated as described (Monaco et al. 2009 Open Tissue Eng. Regen. Med. J. 2, 20-33). The ASC were divided in 7 different treatments: 5 concentrations of copper in the osteogenic medium (0.1, 1, 10, 50, and 100 µM) plus 2 control treatments (osteogenic medium without copper and a negative control, DMEM). The medium was changed twice a week for 4 weeks. The experiment was replicated 6 times. At the end of the culture period, cells were stained with Alizarin Red S and Von Kossa stains. In each well, we counted the total number of nodules that were either formed or forming. Data were analysed using the generalized linear model (GLM) procedure (SPSS Inc./IBM Corp., Armonk, NY). The least significant difference (l.s.d.) post hoc test was used to perform statistical multiple comparison. The α-level was set at 0.05. The results showed that more nodules were formed in the 0.1 and 1 µM copper groups compared with the osteogenic control, but there was no statistical difference between those 2 treatments. Table 1 illustrates the total number of formed and forming nodules in addition to their standard deviation. There was a positive effect on nodule formation when copper concentrations of 0.1 and 1 µM were added to the osteogenic medium. In contrast, copper concentrations of 50 and 100 µM had a cytotoxic effect. These results confirm that low concentrations of copper have a positive effect on osteogenesis. This preliminary experiment is the first step towards the analysis of the behaviour of ASC on scaffolds with copper incorporated into their matrix.
Table 1.The average number (standard deviations in parentheses) of total formed and forming osteoblast nodules compared between treatment groups
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Rajaei B, Massumi M, Wheeler M. Glucose-Responsiveness of Pancreatic β-Like (GRP β-L) Cells Generated from Human Pluripotent Stem Cells. Curr Protoc Hum Genet 2019; 100:e71. [PMID: 30335214 DOI: 10.1002/cphg.71] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The International Diabetic Federation estimated that 415 million adults currently have diabetes and 318 million adults had impaired glucose tolerance, putting them at high risk of developing diabetes in the future. In Type 1 Diabetes (T1D), the β cells are lost because of autoimmune reactions. Although islet transplantation has been a promising therapy for T1D, it is greatly limited by pancreatic donors. Here, we describe a protocol to generate glucose- responsive pancreatic β-like (GRPβ-L) cells from human-induced pluripotent stem (iPS) cells. We recapitulate in vivo pancreas development by in vitro induction of differentiating human (iPS) cells with stage-specific signaling molecules and proteins. Inhibition of Tyrosine Kinase receptor AXL, TGF-β, and Notch signaling pathways in the final stage of the five-stage protocol could efficiently generate GRPβ-L from the endocrine progenitor. Differentiation of human iPS cells through the protocol could result in functional GRPβ-L cells, which could be used in pharmaceutical and β cell biology studies. © 2018 by John Wiley & Sons, Inc.
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Affiliation(s)
- Bahareh Rajaei
- Department of Medical Genetics, Institute of Medical Biotechnology, National Institute of Genetic Engineering and Biotechnology, Tehran, Iran
| | - Mohammad Massumi
- Department of Physiology, University of Toronto, Toronto, Ontario, Canada.,Lunenfeld-Tanenbaum Research Institute, Sinai Health System , Toronto, Ontario, Canada
| | - Michael Wheeler
- Department of Physiology, University of Toronto, Toronto, Ontario, Canada
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Wheeler M, White G, Brockie S, Dickson M, Weinkove R. Flow Cytometric Analysis of Mechanically Disaggregated Bone Marrow Trephine Biopsies. Cytometry 2018; 94:935-940. [DOI: 10.1002/cyto.b.21646] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Revised: 04/24/2018] [Accepted: 05/31/2018] [Indexed: 01/11/2023]
Affiliation(s)
- M. Wheeler
- Wellington Blood & Cancer Centre, Capital & Coast District Health Board Wellington New Zealand
| | - G. White
- Wellington Southern Community Laboratories, Wellington Hospital Wellington New Zealand
| | - S. Brockie
- Wellington Southern Community Laboratories, Wellington Hospital Wellington New Zealand
| | - M. Dickson
- Cancer Immunotherapy GroupMalaghan Institute of Medical Research Wellington New Zealand
| | - R. Weinkove
- Wellington Blood & Cancer Centre, Capital & Coast District Health Board Wellington New Zealand
- Cancer Immunotherapy GroupMalaghan Institute of Medical Research Wellington New Zealand
- Department of Pathology & Molecular MedicineUniversity of Otago Wellington Wellington New Zealand
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Miller R, Teuteberg J, Wheeler M, Jimenez S, Sallam K, Banerjee D. TEMPORAL CHANGES IN VENTRICULAR ASSIST DEVICE PARAMETERS FOLLOWING RAMP STUDIES. Can J Cardiol 2018. [DOI: 10.1016/j.cjca.2018.07.137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
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Redondo MJ, Geyer S, Steck AK, Sharp S, Wentworth JM, Weedon MN, Antinozzi P, Sosenko J, Atkinson M, Pugliese A, Oram RA, Antinozzi P, Atkinson M, Battaglia M, Becker D, Bingley P, Bosi E, Buckner J, Colman P, Gottlieb P, Herold K, Insel R, Kay T, Knip M, Marks J, Moran A, Palmer J, Peakman M, Philipson L, Pugliese A, Raskin P, Rodriguez H, Roep B, Russell W, Schatz D, Wherrett D, Wilson D, Winter W, Ziegler A, Benoist C, Blum J, Chase P, Clare-Salzler M, Clynes R, Eisenbarth G, Fathman C, Grave G, Hering B, Kaufman F, Leschek E, Mahon J, Nanto-Salonen K, Nepom G, Orban T, Parkman R, Pescovitz M, Peyman J, Roncarolo M, Simell O, Sherwin R, Siegelman M, Steck A, Thomas J, Trucco M, Wagner J, Greenbaum ,CJ, Bourcier K, Insel R, Krischer JP, Leschek E, Rafkin L, Spain L, Cowie C, Foulkes M, Krause-Steinrauf H, Lachin JM, Malozowski S, Peyman J, Ridge J, Savage P, Skyler JS, Zafonte SJ, Kenyon NS, Santiago I, Sosenko JM, Bundy B, Abbondondolo M, Adams T, Amado D, Asif I, Boonstra M, Bundy B, Burroughs C, Cuthbertson D, Deemer M, Eberhard C, Fiske S, Ford J, Garmeson J, Guillette H, Browning G, Coughenour T, Sulk M, Tsalikan E, Tansey M, Cabbage J, Dixit N, Pasha S, King M, Adcock K, Geyer S, Atterberry H, Fox L, Englert K, Mauras N, Permuy J, Sikes K, Berhe T, Guendling B, McLennan L, Paganessi L, Hays B, Murphy C, Draznin M, Kamboj M, Sheppard S, Lewis V, Coates L, Moore W, Babar G, Bedard J, Brenson-Hughes D, Henderson C, Cernich J, Clements M, Duprau R, Goodman S, Hester L, Huerta-Saenz L, Karmazin A, Letjen T, Raman S, Morin D, Henry M, Bestermann W, Morawski E, White J, Brockmyer A, Bays R, Campbell S, Stapleton A, Stone N, Donoho A, Everett H, Heyman K, Hensley H, Johnson M, Marshall C, Skirvin N, Taylor P, Williams R, Ray L, Wolverton C, Nickels D, Dothard C, Hsiao B, Speiser P, Pellizzari M, Bokor L, Izuora K, Abdelnour S, Cummings P, Paynor S, Leahy M, Riedl M, Shockley S, Karges C, Saad R, Briones T, Casella S, Herz C, Walsh K, Greening J, Hay F, Hunt S, Sikotra N, Simons L, Keaton N, Karounos D, Oremus R, Dye L, Myers L, Ballard D, Miers W, Sparks R, Thraikill K, Edwards K, Fowlkes J, Kinderman A, Kemp S, Morales A, Holland L, Johnson L, Paul P, Ghatak A, Phelen K, Leyland H, Henderson T, Brenner D, Law P, Oppenheimer E, Mamkin I, Moniz C, Clarson C, Lovell M, Peters A, Ruelas V, Borut D, Burt D, Jordan M, Leinbach A, Castilla S, Flores P, Ruiz M, Hanson L, Green-Blair J, Sheridan R, Wintergerst K, Pierce G, Omoruyi A, Foster M, Linton C, Kingery S, Lunsford A, Cervantes I, Parker T, Price P, Urben J, Doughty I, Haydock H, Parker V, Bergman P, Liu S, Duncum S, Rodda C, Thomas A, Ferry R, McCommon D, Cockroft J, Perelman A, Calendo R, Barrera C, Arce-Nunez E, Lloyd J, Martinez Y, De la Portilla M, Cardenas I, Garrido L, Villar M, Lorini R, Calandra E, D’Annuzio G, Perri K, Minuto N, Malloy J, Rebora C, Callegari R, Ali O, Kramer J, Auble B, Cabrera S, Donohoue P, Fiallo-Scharer R, Hessner M, Wolfgram P, Maddox K, Kansra A, Bettin N, McCuller R, Miller A, Accacha S, Corrigan J, Fiore E, Levine R, Mahoney T, Polychronakos C, Martin J, Gagne V, Starkman H, Fox M, Chin D, Melchionne F, Silverman L, Marshall I, Cerracchio L, Cruz J, Viswanathan A, Miller J, Wilson J, Chalew S, Valley S, Layburn S, Lala A, Clesi P, Genet M, Uwaifo G, Charron A, Allerton T, Milliot E, Cefalu W, Melendez-Ramirez L, Richards R, Alleyn C, Gustafson E, Lizanna M, Wahlen J, Aleiwe S, Hansen M, Wahlen H, Moore M, Levy C, Bonaccorso A, Rapaport R, Tomer Y, Chia D, Goldis M, Iazzetti L, Klein M, Levister C, Waldman L, Muller S, Wallach E, Regelmann M, Antal Z, Aranda M, Reynholds C, Leech N, Wake D, Owens C, Burns M, Wotherspoon J, Nguyen T, Murray A, Short K, Curry G, Kelsey S, Lawson J, Porter J, Stevens S, Thomson E, Winship S, Wynn L, O’Donnell R, Wiltshire E, Krebs J, Cresswell P, Faherty H, Ross C, Vinik A, Barlow P, Bourcier M, Nevoret M, Couper J, Oduah V, Beresford S, Thalagne N, Roper H, Gibbons J, Hill J, Balleaut S, Brennan C, Ellis-Gage J, Fear L, Gray T, Pilger J, Jones L, McNerney C, Pointer L, Price N, Few K, Tomlinson D, Denvir L, Drew J, Randell T, Mansell P, Roberts A, Bell S, Butler S, Hooton Y, Navarra H, Roper A, Babington G, Crate L, Cripps H, Ledlie A, Moulds C, Sadler K, Norton R, Petrova B, Silkstone O, Smith C, Ghai K, Murray M, Viswanathan V, Henegan M, Kawadry O, Olson J, Stavros T, Patterson L, Ahmad T, Flores B, Domek D, Domek S, Copeland K, George M, Less J, Davis T, Short M, Tamura R, Dwarakanathan A, O’Donnell P, Boerner B, Larson L, Phillips M, Rendell M, Larson K, Smith C, Zebrowski K, Kuechenmeister L, Wood K, Thevarayapillai M, Daniels M, Speer H, Forghani N, Quintana R, Reh C, Bhangoo A, Desrosiers P, Ireland L, Misla T, Xu P, Torres C, Wells S, Villar J, Yu M, Berry D, Cook D, Soder J, Powell A, Ng M, Morrison M, Young K, Haslam Z, Lawson M, Bradley B, Courtney J, Richardson C, Watson C, Keely E, DeCurtis D, Vaccarcello-Cruz M, Torres Z, Alies P, Sandberg K, Hsiang H, Joy B, McCormick D, Powell A, Jones H, Bell J, Hargadon S, Hudson S, Kummer M, Badias F, Sauder S, Sutton E, Gensel K, Aguirre-Castaneda R, Benavides Lopez V, Hemp D, Allen S, Stear J, Davis E, Jones T, Baker A, Roberts A, Dart J, Paramalingam N, Levitt Katz L, Chaudhary N, Murphy K, Willi S, Schwartzman B, Kapadia C, Larson D, Bassi M, McClellan D, Shaibai G, Kelley L, Villa G, Kelley C, Diamond R, Kabbani M, Dajani T, Hoekstra F, Magorno M, Beam C, Holst J, Chauhan V, Wilson N, Bononi P, Sperl M, Millward A, Eaton M, Dean L, Olshan J, Renna H, Boulware D, Milliard C, Snyder D, Beaman S, Burch K, Chester J, Ahmann A, Wollam B, DeFrang D, Fitch R, Jahnke K, Bounmananh L, Hanavan K, Klopfenstein B, Nicol L, Bergstrom R, Noland T, Brodksy J, Bacon L, Quintos J, Topor L, Bialo S, Bream S, Bancroft B, Soto A, Lagarde W, Lockemer H, Vanderploeg T, Ibrahim M, Huie M, Sanchez V, Edelen R, Marchiando R, Freeman D, Palmer J, Repas T, Wasson M, Auker P, Culbertson J, Kieffer T, Voorhees D, Borgwardt T, DeRaad L, Eckert K, Gough J, Isaacson E, Kuhn H, Carroll A, Schubert M, Francis G, Hagan S, Le T, Penn M, Wickham E, Leyva C, Ginem J, Rivera K, Padilla J, Rodriguez I, Jospe N, Czyzyk J, Johnson B, Nadgir U, Marlen N, Prakasam G, Rieger C, Granger M, Glaser N, Heiser E, Harris B, Foster C, Slater H, Wheeler K, Donaldson D, Murray M, Hale D, Tragus R, Holloway M, Word D, Lynch J, Pankratz L, Rogers W, Newfield R, Holland S, Hashiguchi M, Gottschalk M, Philis-Tsimikas A, Rosal R, Kieffer M, Franklin S, Guardado S, Bohannon N, Garcia M, Aguinaldo T, Phan J, Barraza V, Cohen D, Pinsker J, Khan U, Lane P, Wiley J, Jovanovic L, Misra P, Wright M, Cohen D, Huang K, Skiles M, Maxcy S, Pihoker C, Cochrane K, Nallamshetty L, Fosse J, Kearns S, Klingsheim M, Wright N, Viles L, Smith H, Heller S, Cunningham M, Daniels A, Zeiden L, Parrimon Y, Field J, Walker R, Griffin K, Bartholow L, Erickson C, Howard J, Krabbenhoft B, Sandman C, Vanveldhuizen A, Wurlger J, Paulus K, Zimmerman A, Hanisch K, Davis-Keppen L, Cotterill A, Kirby J, Harris M, Schmidt A, Kishiyama C, Flores C, Milton J, Ramiro J, Martin W, Whysham C, Yerka A, Freels T, Hassing J, Webster J, Green R, Carter P, Galloway J, Hoelzer D, Ritzie AQL, Roberts S, Said S, Sullivan P, Allen H, Reiter E, Feinberg E, Johnson C, Newhook L, Hagerty D, White N, Sharma A, Levandoski L, Kyllo J, Johnson M, Benoit C, Iyer P, Diamond F, Hosono H, Jackman S, Barette L, Jones P, Shor A, Sills I, Bzdick S, Bulger J, Weinstock R, Douek I, Andrews R, Modgill G, Gyorffy G, Robin L, Vaidya N, Song X, Crouch S, O’Brien K, Thompson C, Thorne N, Blumer J, Kalic J, Klepek L, Paulett J, Rosolowski B, Horner J, Terry A, Watkins M, Casey J, Carpenter K, Burns C, Horton J, Pritchard C, Soetaert D, Wynne A, Kaiserman K, Halvorson M, Weinberger J, Chin C, Molina O, Patel C, Senguttuvan R, Wheeler M, Furet O, Steuhm C, Jelley D, Goudeau S, Chalmers L, Wootten M, Greer D, Panagiotopoulos C, Metzger D, Nguyen D, Horowitz M, Christiansen M, Glades E, Morimoto C, Macarewich M, Norman R, Harding P, Patin K, Vargas C, Barbanica A, Yu A, Vaidyanathan P, Osborne W, Mehra R, Kaster S, Neace S, Horner J, McDonough S, Reeves G, Cordrey C, Marrs L, Miller T, Dowshen S, Doyle D, Walker S, Catte D, Dean H, Drury-Brown M, McGee PF, Hackman B, Lee M, Malkani S, Cullen K, Johnson K, Hampton P, McCarrell M, Curtis C, Paul E, Zambrano Y, Hess KO, Phoebus D, Quinlan S, Raiden E, Batts E, Buddy C, Kirpatrick K, Ramey M, Shultz A, Webb C, Romesco M, Fradkin J, Blumberg E, Beck G, Brillon D, Gubitosi-Klug R, Laffel L, Veatch R, Wallace D, Braun J, Lernmark A, Lo B, Mitchell H, Naji A, Nerup J, Orchard T, Steffes M, Tsiatis A, Zinman B, Loechelt B, Baden L, Green M, Weinberg A, Marcovina S, Palmer JP, Weinberg A, Yu L, Babu S, Winter W, Eisenbarth GS, Bingley P, Clynes R, DiMeglio L, Eisenbarth G, Hays B, Marks J, Matheson D, Rodriguez H, Wilson D, Redondo MJ, Gomez D, Zheng X, Pena S, Pietropaolo M, Batts E, Brown T, Buckner J, Dove A, Hammond M, 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Espinoza O, Frank E, Liu J, Perry J, Pyle R, Rigby A, Riley K, Soto A, Gitelman S, Adi S, Anderson M, Berhel A, Breen K, Fraser K, Gerard-Gonzalez A, Jossan P, Lustig R, Moassesfar S, Mugg A, Ng D, Prahalod P, Rangel-Lugo M, Sanda S, Tarkoff J, Torok C, Wesch R, Aslan I, Buchanan J, Cordier J, Hamilton C, Hawkins L, Ho T, Jain A, Ko K, Lee T, Phelps S, Rosenthal S, Sahakitrungruang T, Stehl L, Taylor L, Wertz M, Wong J, Philipson L, Briars R, Devine N, Littlejohn E, Grant T, Gottlieb P, Klingensmith G, Steck A, Alkanani A, Bautista K, Bedoy R, Blau A, Burke B, Cory L, Dang M, Fitzgerald-Miller L, Fouts A, Gage V, Garg S, Gesauldo P, Gutin R, Hayes C, Hoffman M, Ketchum K, Logsden-Sackett N, Maahs D, Messer L, Meyers L, Michels A, Peacock S, Rewers M, Rodriguez P, Sepulbeda F, Sippl R, Steck A, Taki I, Tran BK, Tran T, Wadwa RP, Zeitler P, Barker J, Barry S, Birks L, Bomsburger L, Bookert T, Briggs L, Burdick P, Cabrera R, Chase P, Cobry E, Conley A, Cook G, Daniels J, DiDomenico D, 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Castleden H, Farthing N, Loud S, Matthews C, McGhee J, Morgan A, Pollitt J, Elliot-Jones R, Wheaton C, Knip M, Siljander H, Suomalainen H, Colman P, Healy F, Mesfin S, Redl L, Wentworth J, Willis J, Farley M, Harrison L, Perry C, Williams F, Mayo A, Paxton J, Thompson V, Volin L, Fenton C, Carr L, Lemon E, Swank M, Luidens M, Salgam M, Sharma V, Schade D, King C, Carano R, Heiden J, Means N, Holman L, Thomas I, Madrigal D, Muth T, Martin C, Plunkett C, Ramm C, Auchus R, Lane W, Avots E, Buford M, Hale C, Hoyle J, Lane B, Muir A, Shuler S, Raviele N, Ivie E, Jenkins M, Lindsley K, Hansen I, Fadoju D, Felner E, Bode B, Hosey R, Sax J, Jefferies C, Mannering S, Prentis R, She J, Stachura M, Hopkins D, Williams J, Steed L, Asatapova E, Nunez S, Knight S, Dixon P, Ching J, Donner T, Longnecker S, Abel K, Arcara K, Blackman S, Clark L, Cooke D, Plotnick L, Levin P, Bromberger L, Klein K, Sadurska K, Allen C, Michaud D, Snodgrass H, Burghen G, Chatha S, Clark C, Silverberg J, Wittmer C, Gardner J, LeBoeuf C, Bell P, McGlore O, Tennet H, Alba N, Carroll M, Baert L, Beaton H, Cordell E, Haynes A, Reed C, Lichter K, McCarthy P, McCarthy S, Monchamp T, Roach J, Manies S, Gunville F, Marosok L, Nelson T, Ackerman K, Rudolph J, Stewart M, McCormick K, May S, Falls T, Barrett T, Dale K, Makusha L, McTernana C, Penny-Thomas K, Sullivan K, Narendran P, Robbie J, Smith D, Christensen R, Koehler B, Royal C, Arthur T, Houser H, Renaldi J, Watsen S, Wu P, Lyons L, House B, Yu J, Holt H, Nation M, Vickers C, Watling R, Heptulla R, Trast J, Agarwal C, Newell D, Katikaneni R, Gardner C, Del Rio A, Logan A, Collier H, Rishton C, Whalley G, Ali A, Ramtoola S, Quattrin T, Mastrandea L, House A, Ecker M, Huang C, Gougeon C, Ho J, Pacuad D, Dunger D, May J, O’Brien C, Acerini C, Salgin B, Thankamony A, Williams R, Buse J, Fuller G, Duclos M, Tricome J, Brown H, Pittard D, Bowlby D, Blue A, Headley T, Bendre S, Lewis K, Sutphin K, Soloranzo C, Puskaric J, Madison H, Rincon M, Carlucci M, 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Trunnel S, Transue D, Surhigh J, Bezzaire D, Moltz K, Zacharski E, Henske J, Desai S, Frizelis K, Khan F, Sjoberg R, Allen K, Manning P, Hendry G, Taylor B, Jones S, Couch R, Danchak R, Lieberman D, Strader W, Bencomo M, Bailey T, Bedolla L, Roldan C, Moudiotis C, Vaidya B, Anning C, Bunce S, Estcourt S, Folland E, Gordon E, Harrill C, Ireland J, Piper J, Scaife L, Sutton K, Wilkins S, Costelloe M, Palmer J, Casas L, Miller C, Burgard M, Erickson C, Hallanger-Johnson J, Clark P, Taylor W, Galgani J, Banerjee S, Banda C, McEowen D, Kinman R, Lafferty A, Gillett S, Nolan C, Pathak M, Sondrol L, Hjelle T, Hafner S, Kotrba J, Hendrickson R, Cemeroglu A, Symington T, Daniel M, Appiagyei-Dankah Y, Postellon D, Racine M, Kleis L, Barnes K, Godwin S, McCullough H, Shaheen K, Buck G, Noel L, Warren M, Weber S, Parker S, Gillespie I, Nelson B, Frost C, Amrhein J, Moreland E, Hayes A, Peggram J, Aisenberg J, Riordan M, Zasa J, Cummings E, Scott K, Pinto T, Mokashi A, McAssey K, Helden E, Hammond P, Dinning L, Rahman S, Ray S, Dimicri C, Guppy S, Nielsen H, Vogel C, Ariza C, Morales L, Chang Y, Gabbay R, Ambrocio L, Manley L, Nemery R, Charlton W, Smith P, Kerr L, Steindel-Kopp B, Alamaguer M, Tabisola-Nuesca E, Pendersen A, Larson N, Cooper-Olviver H, Chan D, Fitz-Patrick D, Carreira T, Park Y, Ruhaak R, Liljenquist D. A Type 1 Diabetes Genetic Risk Score Predicts Progression of Islet Autoimmunity and Development of Type 1 Diabetes in Individuals at Risk. Diabetes Care 2018; 41:1887-1894. [PMID: 30002199 PMCID: PMC6105323 DOI: 10.2337/dc18-0087] [Citation(s) in RCA: 86] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/11/2018] [Accepted: 06/06/2018] [Indexed: 02/03/2023]
Abstract
OBJECTIVE We tested the ability of a type 1 diabetes (T1D) genetic risk score (GRS) to predict progression of islet autoimmunity and T1D in at-risk individuals. RESEARCH DESIGN AND METHODS We studied the 1,244 TrialNet Pathway to Prevention study participants (T1D patients' relatives without diabetes and with one or more positive autoantibodies) who were genotyped with Illumina ImmunoChip (median [range] age at initial autoantibody determination 11.1 years [1.2-51.8], 48% male, 80.5% non-Hispanic white, median follow-up 5.4 years). Of 291 participants with a single positive autoantibody at screening, 157 converted to multiple autoantibody positivity and 55 developed diabetes. Of 953 participants with multiple positive autoantibodies at screening, 419 developed diabetes. We calculated the T1D GRS from 30 T1D-associated single nucleotide polymorphisms. We used multivariable Cox regression models, time-dependent receiver operating characteristic curves, and area under the curve (AUC) measures to evaluate prognostic utility of T1D GRS, age, sex, Diabetes Prevention Trial-Type 1 (DPT-1) Risk Score, positive autoantibody number or type, HLA DR3/DR4-DQ8 status, and race/ethnicity. We used recursive partitioning analyses to identify cut points in continuous variables. RESULTS Higher T1D GRS significantly increased the rate of progression to T1D adjusting for DPT-1 Risk Score, age, number of positive autoantibodies, sex, and ethnicity (hazard ratio [HR] 1.29 for a 0.05 increase, 95% CI 1.06-1.6; P = 0.011). Progression to T1D was best predicted by a combined model with GRS, number of positive autoantibodies, DPT-1 Risk Score, and age (7-year time-integrated AUC = 0.79, 5-year AUC = 0.73). Higher GRS was significantly associated with increased progression rate from single to multiple positive autoantibodies after adjusting for age, autoantibody type, ethnicity, and sex (HR 2.27 for GRS >0.295, 95% CI 1.47-3.51; P = 0.0002). CONCLUSIONS The T1D GRS independently predicts progression to T1D and improves prediction along T1D stages in autoantibody-positive relatives.
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Affiliation(s)
- Maria J. Redondo
- Texas Children’s Hospital, Baylor College of Medicine, Houston, TX
| | | | - Andrea K. Steck
- Barbara Davis Center for Childhood Diabetes, University of Colorado School of Medicine, Aurora, CO
| | - Seth Sharp
- Institute of Biomedical and Clinical Science, University of Exeter, Exeter, U.K
| | - John M. Wentworth
- Walter and Eliza Hall Institute of Medical Research and Royal Melbourne Hospital, Parkville, Victoria, Australia
| | - Michael N. Weedon
- Institute of Biomedical and Clinical Science, University of Exeter, Exeter, U.K
| | | | | | | | | | - Richard A. Oram
- Institute of Biomedical and Clinical Science, University of Exeter, Exeter, U.K
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Siraj MA, Mundil D, Afroze T, Liu Y, Wheeler M, Husain M. GLP-1(28-36) Prevents Cardiac Ischemic Injury by MTPα-dependent Inhibition of Fatty Acid Oxidation and Increased Glucose Utilization in Coronary Vascular Cells. ATHEROSCLEROSIS SUPP 2018. [DOI: 10.1016/j.atherosclerosissup.2018.04.444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Rothhammer V, Borucki DM, Tjon EC, Takenaka MC, Chao CC, Ardura-Fabregat A, de Lima KA, Gutiérrez-Vázquez C, Hewson P, Staszewski O, Blain M, Healy L, Neziraj T, Borio M, Wheeler M, Dragin LL, Laplaud DA, Antel J, Alvarez JI, Prinz M, Quintana FJ. Microglial control of astrocytes in response to microbial metabolites. Nature 2018; 557:724-728. [PMID: 29769726 DOI: 10.1038/s41586-018-0119-x] [Citation(s) in RCA: 621] [Impact Index Per Article: 103.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Accepted: 04/11/2018] [Indexed: 12/14/2022]
Abstract
Microglia and astrocytes modulate inflammation and neurodegeneration in the central nervous system (CNS)1-3. Microglia modulate pro-inflammatory and neurotoxic activities in astrocytes, but the mechanisms involved are not completely understood4,5. Here we report that TGFα and VEGF-B produced by microglia regulate the pathogenic activities of astrocytes in the experimental autoimmune encephalomyelitis (EAE) mouse model of multiple sclerosis. Microglia-derived TGFα acts via the ErbB1 receptor in astrocytes to limit their pathogenic activities and EAE development. Conversely, microglial VEGF-B triggers FLT-1 signalling in astrocytes and worsens EAE. VEGF-B and TGFα also participate in the microglial control of human astrocytes. Furthermore, expression of TGFα and VEGF-B in CD14+ cells correlates with the multiple sclerosis lesion stage. Finally, metabolites of dietary tryptophan produced by the commensal flora control microglial activation and TGFα and VEGF-B production, modulating the transcriptional program of astrocytes and CNS inflammation through a mechanism mediated by the aryl hydrocarbon receptor. In summary, we identified positive and negative regulators that mediate the microglial control of astrocytes. Moreover, these findings define a pathway through which microbial metabolites limit pathogenic activities of microglia and astrocytes, and suppress CNS inflammation. This pathway may guide new therapies for multiple sclerosis and other neurological disorders.
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Affiliation(s)
- Veit Rothhammer
- Ann Romney Center for Neurologic Diseases, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Davis M Borucki
- Ann Romney Center for Neurologic Diseases, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Emily C Tjon
- Ann Romney Center for Neurologic Diseases, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Maisa C Takenaka
- Ann Romney Center for Neurologic Diseases, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Chun-Cheih Chao
- Ann Romney Center for Neurologic Diseases, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | | | - Kalil Alves de Lima
- Ann Romney Center for Neurologic Diseases, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Cristina Gutiérrez-Vázquez
- Ann Romney Center for Neurologic Diseases, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Patrick Hewson
- Ann Romney Center for Neurologic Diseases, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Ori Staszewski
- Institute of Neuropathology, Medical Faculty, University of Freiburg, Freiburg, Germany
| | - Manon Blain
- Neuroimmunology Unit, Montreal Neurological Institute, Department of Neurology and Neurosurgery, McGill University, Montreal, Quebec, Canada
| | - Luke Healy
- Neuroimmunology Unit, Montreal Neurological Institute, Department of Neurology and Neurosurgery, McGill University, Montreal, Quebec, Canada
| | - Tradite Neziraj
- Ann Romney Center for Neurologic Diseases, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Matilde Borio
- Ann Romney Center for Neurologic Diseases, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Michael Wheeler
- Ann Romney Center for Neurologic Diseases, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Loic Lionel Dragin
- Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | | | - Jack Antel
- Neuroimmunology Unit, Montreal Neurological Institute, Department of Neurology and Neurosurgery, McGill University, Montreal, Quebec, Canada
| | - Jorge Ivan Alvarez
- Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Marco Prinz
- Institute of Neuropathology, Medical Faculty, University of Freiburg, Freiburg, Germany.,BIOSS Centre for Biological Signaling Studies, University of Freiburg, Freiburg, Germany
| | - Francisco J Quintana
- Ann Romney Center for Neurologic Diseases, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA. .,Broad Institute of MIT and Harvard, Cambridge, MA, USA.
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Grace MS, Climie RED, Wheeler M, Lambert E, Sari CI, Rezai F, Ali H, Lambert G, Owen N, Green DJ, Kingwell BA, Dunstan DW. Prolonged Uninterrupted Sitting Impairs Vascular Function and Increases Biomarkers of Atherosclerotic Risk in Overweight Adults. Med Sci Sports Exerc 2018. [DOI: 10.1249/01.mss.0000535521.67653.e6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Konkle BA, Johnsen JM, Wheeler M, Watson C, Skinner M, Pierce GF. Genotypes, phenotypes and whole genome sequence: Approaches from the My Life Our Future haemophilia project. Haemophilia 2018; 24 Suppl 6:87-94. [PMID: 29878652 PMCID: PMC6258054 DOI: 10.1111/hae.13506] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [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] [Accepted: 04/04/2018] [Indexed: 12/15/2022]
Abstract
INTRODUCTION Information from the genes encoding factor VIII (F8) and IX (F9) is used in reproductive planning and to inform inhibitor formation, bleeding severity and response to therapies. Advances in technology and our understanding of the human genome now allows more comprehensive methods to study genomic variation and its impact on haemophilia. AIMS The My Life Our Future (MLOF) programme was begun in 2012 to provide genetic analysis and to expand research in haemophilia through a research repository. METHODS MLOF enrolled haemophilia A and B patients followed at haemophilia treatment centers in the U.S., including, since 2015, known and potential genetic carriers. Initial F8 and F9 DNA analysis was performed utilizing a next generation sequencing approach which allowed simultaneous detection of F8 inversions and other variants. Candidate variants were confirmed using a second method and multiplex ligation-dependent probe amplification was used to detect structural variants. RESULTS The initial phase of MLOF completed enrollment in December 2017 with 11,356 patients, genetic carriers, and potential carriers enrolled. In the 9453 subjects in whom analysis is complete, 687 unique previously unreported variants were found. Simultaneous sequencing of the F8 and F9 genes resulted in identification of non-deleterious variants previously reported as causative in haemophilia. DNA from 5141 MLOF subjects has undergone whole genome sequencing through the NHLBI TOPMed programme of the U.S. NIH. CONCLUSION MLOF has provided genetic information for patients and their families to help inform clinical care and has established a repository of data and biospecimens to further advance haemophilia research.
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Affiliation(s)
- B A Konkle
- Bloodworks Northwest, Seattle, WA, USA
- University of Washington, Seattle, WA, USA
| | - J M Johnsen
- Bloodworks Northwest, Seattle, WA, USA
- University of Washington, Seattle, WA, USA
| | - M Wheeler
- University of Washington, Seattle, WA, USA
| | - C Watson
- American Thrombosis and Hemostasis Network, Chicago, IL, USA
| | - M Skinner
- National Hemophilia Foundation, New York, NY, USA
| | - G F Pierce
- National Hemophilia Foundation, New York, NY, USA
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Eaton KA, Lloyd HA, Wheeler M, Sullivan J, Klass C, Allen Y, Lambert-Humble S. Looking after the mouth - Evaluation of a pilot for a new approach to training care home carers in Kent, Surrey and Sussex. Br Dent J 2018; 221:31-6. [PMID: 27388088 DOI: 10.1038/sj.bdj.2016.497] [Citation(s) in RCA: 3] [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] [Accepted: 06/07/2016] [Indexed: 11/09/2022]
Abstract
Objective This pilot study aimed to produce and evaluate training resources and training in oral health care, including oral hygiene, for carers in care homes in Surrey and Medway.Methods During two training days, for carers from these homes, short, interactive presentations were given on a range of topics relevant to oral health care and oral hygiene of older people, followed by practical training. Prior to any training all attendees completed a 39 question questionnaire to establish their baseline knowledge of oral health and hygiene. At the end of the training day they completed an evaluation form. Fourteen weeks later, they were visited at their place of work and completed the same questionnaire again. Differences in responses between baseline and after 14 weeks were statistically tested using the chi-squared test.Results Sixty-six carers attended the training sessions and 44 were followed up 14 weeks later. The results showed an improvement in carer knowledge at follow up. The majority of carers (36/44) spoke English as their first language. They had a mean age of 41 years, 37 were female and 7 male. They had worked as carers for a mean of 10.9 years (range 4 months-34 years). Over 90% stated that the training day fully met or exceeded their requirements and expectations.Conclusions The results indicated improvements in carer knowledge. However, the carers were atypical of carers in general, as they were self-selected and well-motivated. Nevertheless the content of the training day and the questionnaire should inform future work in this area.
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Affiliation(s)
- K A Eaton
- University of Leeds, Honourary Professor at the University of Kent, Health Education Kent Surrey and Sussex (HEKSS), Regional Dental Tutor Kent
| | - H A Lloyd
- Special Care Dentistry, Project Adviser HEKSS
| | - M Wheeler
- Training and Development Lead HEKSS; Honourary Senior Lecturer, University of Kent
| | - J Sullivan
- HEKSS, General Dental Practitioner, Folkestone, Kent
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Wheeler M, Buyck H, Carter J. Undetectable fibrinogen: Say what? Pathology 2018. [DOI: 10.1016/j.pathol.2017.12.085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Rubessa M, Weisgerber D, Bessler S, Bertels J, Harley B, Wheeler M. 155 Oocyte Maturation in Lyophilized In Vitro Maturation Medium as a Method to Increase the Medium’s Shelf-Life. Reprod Fertil Dev 2018. [DOI: 10.1071/rdv30n1ab155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
The in vitro production of bovine embryos has dramatically increased in recent years, and with it the demand of stable media with a long shelf-life. In this experiment we evaluated the impact of the freeze-dried in vitro maturation (IVM) medium (Mdry) on in vitro oocyte maturation. We compared the standard IVM and the Mdry media. Medium M199 was used as base for the IVM medium. The percentage of metaphase II oocytes and embryo production were evaluated. Media solutions (10 mL) were aliquoted into 50-mL conical tubes and lyophilized to form a powder concentrate using a Genesis freeze-dryer (VirTis, Gardener, NY, USA). Lyophilization consisted of a constant cooling from 20°C to –10°C at a constant rate of 1°C/min with a 2-h hold at –10°C before sublimation at 0°C. The Mdry medium was held at –80°C for 4 months (only serum and hormones were added before the incubation). When the IVM medium was rehydrated, the pH were adjusted to 7.4. The percentage of mature oocytes was evaluated after 24 h of maturation. The oocytes were stained with Hoechst 33342, and only oocytes with metaphase and a polar body were evaluated as matured. Abattoir-derived Holstein oocytes (n = 540) were in vitro matured (25–30/well in 400 µL) and fertilized with sexed semen, according to standard procedures (Rubessa et al. 2011 Theriogenology 76, 1347-1355). The oocytes were split for analysis (432 were used for IVP and 108 for maturation rate) over 6 replicates. Twenty hours after IVF, presumptive zygotes were cultured in SOF medium at 39°C with 5% CO2, 7% O2, and 88% N2. On Day 7, embryo yields were assessed. All recorded parameters were subjected to a Student’s t-test. The parameters compared were maturation rate, cleavage rate, blastocyst rate and the percentage of embryos cleaved. The α level was set at 0.05. All data were expressed as quadratic means and mean standard deviations. The results showed no differences between the 2 groups (75.9% v. 74.1%) (t = 0.37; SD = 12.69; P = 0.36; df = 5) when we compared the nuclear maturation; however, when we evaluated embryo production, we found the Mdry treatment had a higher cleavage percentage (t = 2.39; SD = 14.81; P = 0.02; df = 5) and total embryos produced (t = 2.49; SD = 5.6; P = 0.02; df = 5) compared with the control (Table 1.). These results showed that lyophilization can be a valid method to increase the shelf life of IVP media. More replicates must be done in order to understand why the freeze-dried media produced more embryos.
Table 1.Mean (SD in parentheses) percentage cleavage and blastocysts
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Rubessa M, Salerno F, Weisgerber D, Gasparrini B, Harley B, Wheeler M. 123 In Vitro Embryo Production in Lyophilized In Vitro Culture Medium as a Method to Increase the Medium's Shelf-Life. Reprod Fertil Dev 2018. [DOI: 10.1071/rdv30n1ab123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
The worldwide production of livestock embryos requires stable medium with long shelf life. In this experiment, we evaluated the impact of the freeze-dried in vitro culture (IVC) medium (Mdry) on in vitro embryo production. We compared the standard IVC and Mdry media for cleavage rate and embryo production. Media solutions (10 mL) were aliquoted into 50-mL conical tubes and lyophilized to form a powder concentrate using a Genesis freeze-dryer (VirTis, Gardener, NY, USA). Lyophilization consisted of a constant cooling from 20°C to –10°C at a constant rate of 1°C/min with a 2-h hold at –10°C before sublimation at 0°C. Mdry medium were held at –80°C for 4 months. When the IVC medium was rehydrated, the pH were adjusted to 7.4. Abattoir-derived Holstein oocytes (n = 618, in 7 replicates) were in vitro matured and fertilized with sexed semen, according to standard procedures (Rubessa et al. 2011 Theriogenology 76, 1347-1355). Twenty hours after IVF, presumptive zygotes were cultured in SOF medium with 5% BS at 39°C with 5% CO2, 7% O2, and 88% N2. On Day 7, embryo yields were assessed. All recorded parameters were subjected to a Chi-Square Test 2 × 2. The parameters compared were percent cleavage, blastocysts, and embryos/cleaved. The α level was set at 0.05. All data were expressed as quadratic means and mean standard errors. The results (Table 1) showed not a statistical difference between control and Mdry. The Mdry had a higher percentage of cleaved zygotes (65.4% v. 53.4%) but not enough for a statistical difference. However, when we compared embryo production, there was no difference between treatments. The ratio between blastocysts and cleaved embryos was higher in the control group but not significant according to our selected α level. These results indicate that it is possible lyophilize IVC medium without interfering with the potential quality of the medium. Further studies will be needed to better understand the positive effect of the lyophilization on the cleavage rate.
Table 1.Mean (SD in parentheses) percentage cleavage and blastocysts
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Siraj M, Mundil D, Afroze T, Ying L, Wheeler M, Keller G, Husain M. 4805GLP-1(28–36) prevents ischemic cardiac injury by modulating metabolism and activating soluble adenylyl cyclase in coronary vascular cells. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx494.4805] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Wang T, Liao Y, Wang M, Wheeler M. P4547Meta-analysis of surgical repair or replacement for rheumatic mitral valve disease. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx504.p4547] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Wang T, Liao Y, Wang M, Wheeler M. Rheumatic Mitral Valve Surgery: Meta-Analysis of Repair Versus Replacement. Heart Lung Circ 2017. [DOI: 10.1016/j.hlc.2017.06.678] [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: 11/25/2022]
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Knepp TN, Szykman JJ, Long R, Duvall RM, Krug J, Beaver M, Cavender K, Kronmiller K, Wheeler M, Delgado R, Hoff R, Berkoff T, Olson E, Clark R, Wolfe D, Van Gilst D, Neil D. Assessment of Mixed-Layer Height Estimation from Single-wavelength Ceilometer Profiles. Atmos Meas Tech 2017; 10:3963-3983. [PMID: 29682087 PMCID: PMC5906814 DOI: 10.5194/amt-10-3963-2017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Differing boundary/mixed-layer height measurement methods were assessed in moderately-polluted and clean environments, with a focus on the Vaisala CL51 ceilometer. This intercomparison was performed as part of ongoing measurements at the Chemistry And Physics of the Atmospheric Boundary Layer Experiment (CAPABLE) site in Hampton, Virginia and during the 2014 Deriving Information on Surface Conditions from Column and Vertically Resolved Observations Relevant to Air Quality (DISCOVER-AQ) field campaign that took place in and around Denver, Colorado. We analyzed CL51 data that were collected via two different methods (BLView software, which applied correction factors, and simple terminal emulation logging) to determine the impact of data collection methodology. Further, we evaluated the STRucture of the ATmosphere (STRAT) algorithm as an open-source alternative to BLView (note that the current work presents an evaluation of the BLView and STRAT algorithms and does not intend to act as a validation of either). Filtering criteria were defined according to the change in mixed-layer height (MLH) distributions for each instrument and algorithm and were applied throughout the analysis to remove high-frequency fluctuations from the MLH retrievals. Of primary interest was determining how the different data-collection methodologies and algorithms compare to each other and to radiosonde-derived boundary-layer heights when deployed as part of a larger instrument network. We determined that data-collection methodology is not as important as the processing algorithm and that much of the algorithm differences might be driven by impacts of local meteorology and precipitation events that pose algorithm difficulties. The results of this study show that a common processing algorithm is necessary for LIght Detection And Ranging (LIDAR)-based MLH intercomparisons, and ceilometer-network operation and that sonde-derived boundary layer heights are higher (10-15% at mid-day) than LIDAR-derived mixed-layer heights. We show that averaging the retrieved MLH to 1-hour resolution (an appropriate time scale for a priori data model initialization) significantly improved correlation between differing instruments and differing algorithms.
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Affiliation(s)
- Travis N Knepp
- Science Systems and Applications Inc., Hampton, Virginia 23666, USA
- NASA Langley Research Center, Hampton, Virginia 23681, USA
| | - James J Szykman
- US EPA, Research Triangle Park, Durham, North Carolina 27709, USA
| | - Russell Long
- US EPA, Research Triangle Park, Durham, North Carolina 27709, USA
| | | | - Jonathan Krug
- US EPA, Research Triangle Park, Durham, North Carolina 27709, USA
| | - Melinda Beaver
- US EPA, Research Triangle Park, Durham, North Carolina 27709, USA
| | - Kevin Cavender
- US EPA, Research Triangle Park, Durham, North Carolina 27709, USA
| | | | | | - Ruben Delgado
- Joint Center for Earth Systems Technology, University of Maryland Baltimore County, Baltimore, Maryland 21250, USA
| | - Raymond Hoff
- Joint Center for Earth Systems Technology, University of Maryland Baltimore County, Baltimore, Maryland 21250, USA
| | | | - Erik Olson
- Space Science and Engineering Center, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
| | - Richard Clark
- Department of Earth Sciences, Millersville University, Millersville, Pennsylvania 17551, USA
| | - Daniel Wolfe
- NOAA/ESRL Physical Sciences Division, Boulder, Colorado 80305, USA
| | - David Van Gilst
- National Suborbital Education and Research Center, University of North Dakota, Grand Forks, North Dakota 58202, USA
| | - Doreen Neil
- NASA Langley Research Center, Hampton, Virginia 23681, USA
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Rubessa M, Lotti SN, Knox RV, Wheeler M. 140 COMPARISON OF 3 DIFFERENT METHODS TO SELECT HIGH SPERM QUALITY FOR IVF. Reprod Fertil Dev 2017. [DOI: 10.1071/rdv29n1ab140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Sperm selection is a fundamental step for IVF, influencing treatment and the health of offspring. Over the years, several techniques have been tested to recover highly motile sperm, including centrifugation with discontinuous gradients and numerous filtration procedures. In our previous paper, we showed that it is possible, in ~20 min, to select a high quality sperm population using an electric charge in a microchannel device. This method produced the same blastocyst rates as a discontinuous gradient (DG), but in less time [25 min less; Rubessa et al. 2016 Andrology (Los Angeles) 5]. This technique takes advantage of one of the physiological characteristics of high quality sperm; that is, the head has a negative electric charge. The aim of the present experiment was to analyse the characteristics of the sperm selected with our device. We compared 2 standard sperm procedures and our device, with semen assessed using a computer-assisted sperm analyzer to evaluate the principal sperm parameters. Standard procedures were used to select sperm by DG and swim-up (SU). Thawed semen was pipetted into the microchannel of our device and then exposed to the electric charge (10 V) for 10 min [Rubessa et al. 2016 Andrology (Los Angeles) 5]. For each replicate, 3 straws of frozen bovine semen were thawed at 37°C for 40 s and pooled. The pooled sample was divided into 3 aliquots: one for each technique, 5 replicates of the experiment were performed. Data were analysed by ANOVA using the general linear model (GLM) procedure (SPSS Inc., Chicago, IL, USA). Bonferroni’s post hoc test was used to perform statistical multiple comparison. The α-level was set at 0.05. The results show an effect of the method all motility parameters are not significantly different, although some of the motility parameters were statistically different (P < 0.05). (P < 0.05). The beat cross frequency results were 23 ± 2.4 v. 37.7 ± 2.1 v. 19.5 ± 0.7 (µm/s) for DG, SU, and EC. The same statistical differences were found for the STR (straightness): 75 ± 3.5 v. 84.5 ± 2.0 v. 62.3 ± 2.4 (µm/s), and LIN (linearity): 39.8 ± 4.4 v. 53 ± 1.2 and 31.8 ± 1.4. These results confirmed the potential of this new device, and that it is possible to use this new method to select high motility sperm without harming sperm characteristics. These results showed that our device produced the same quality of sperm obtained with DG and SU but in as little as 20 min.
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Grace M, Climie R, Wheeler M, Eikelis N, Carr J, Dillon F, Owen N, Green D, Kingwell B, Dunstan D. P175 AN ACUTE BOUT OF PROLONGED SITTING IMPAIRS ENDOTHELIAL FUNCTION AND INCREASES PLASMA CONCENTRATIONS OF ENDOTHELIN-1 IN OVERWEIGHT/OBESE ADULTS: IMPLICATIONS FOR GLUCOSE AND INSULIN METABOLISM. Artery Res 2017. [DOI: 10.1016/j.artres.2017.10.123] [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: 11/17/2022] Open
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Aymami M, Haddad F, Amsallem M, Marques M, Sallam K, Wheeler M, Adams J, Zeigler S, Woo J, Ha R, Banerjee D. External validation of right heart failure risk scores following LVAD implantation and evaluation of emerging echocardiographic indices. Archives of Cardiovascular Diseases Supplements 2017. [DOI: 10.1016/s1878-6480(17)30158-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Liang T, Qin T, Xie L, Dolai S, Zhu D, Prentice KJ, Wheeler M, Kang Y, Osborne L, Gaisano HY. New Roles of Syntaxin-1A in Insulin Granule Exocytosis and Replenishment. J Biol Chem 2016; 292:2203-2216. [PMID: 28031464 DOI: 10.1074/jbc.m116.769885] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2016] [Indexed: 01/14/2023] Open
Abstract
In type-2 diabetes (T2D), severely reduced islet syntaxin-1A (Syn-1A) levels contribute to insulin secretory deficiency. We generated β-cell-specific Syn-1A-KO (Syn-1A-βKO) mice to mimic β-cell Syn-1A deficiency in T2D. Glucose tolerance tests showed that Syn-1A-βKO mice exhibited blood glucose elevation corresponding to reduced blood insulin levels. Perifusion of Syn-1A-βKO islets showed impaired first- and second-phase glucose-stimulated insulin secretion (GSIS) resulting from reduction in readily releasable pool and granule pool refilling. To unequivocally determine the β-cell exocytotic defects caused by Syn-1A deletion, EM and total internal reflection fluorescence microscopy showed that Syn-1A-KO β-cells had a severe reduction in the number of secretory granules (SGs) docked onto the plasma membrane (PM) at rest and reduced SG recruitment to the PM after glucose stimulation, the latter indicating defects in replenishment of releasable pools required to sustain second-phase GSIS. Whereas reduced predocked SG fusion accounted for reduced first-phase GSIS, selective reduction of exocytosis of short-dock (but not no-dock) newcomer SGs accounted for the reduced second-phase GSIS. These Syn-1A actions on newcomer SGs were partly mediated by Syn-1A interactions with newcomer SG VAMP8.
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Affiliation(s)
- Tao Liang
- From the Departments of Medicine.,Physiology, University of Toronto, Toronto, Ontario M5S 1A8, Canada
| | - Tairan Qin
- From the Departments of Medicine.,Physiology, University of Toronto, Toronto, Ontario M5S 1A8, Canada
| | - Li Xie
- From the Departments of Medicine.,Physiology, University of Toronto, Toronto, Ontario M5S 1A8, Canada
| | - Subhankar Dolai
- From the Departments of Medicine.,Physiology, University of Toronto, Toronto, Ontario M5S 1A8, Canada
| | - Dan Zhu
- From the Departments of Medicine.,Physiology, University of Toronto, Toronto, Ontario M5S 1A8, Canada
| | - Kacey J Prentice
- Physiology, University of Toronto, Toronto, Ontario M5S 1A8, Canada
| | - Michael Wheeler
- Physiology, University of Toronto, Toronto, Ontario M5S 1A8, Canada
| | - Youhou Kang
- From the Departments of Medicine.,Physiology, University of Toronto, Toronto, Ontario M5S 1A8, Canada
| | - Lucy Osborne
- From the Departments of Medicine.,Molecular Genetics, and
| | - Herbert Y Gaisano
- From the Departments of Medicine, .,Physiology, University of Toronto, Toronto, Ontario M5S 1A8, Canada
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Yakirevich E, Resnick MB, Mangray S, Wheeler M, Jackson CL, Lombardo KA, Lee J, Kim KM, Gill AJ, Wang K, Gowen K, Sun J, Miller VA, Stephens PJ, Ali SM, Ross JS, Safran H. Oncogenic ALK Fusion in Rare and Aggressive Subtype of Colorectal Adenocarcinoma as a Potential Therapeutic Target. Clin Cancer Res 2016; 22:3831-40. [DOI: 10.1158/1078-0432.ccr-15-3000] [Citation(s) in RCA: 83] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Accepted: 02/18/2016] [Indexed: 11/16/2022]
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Wennberg P, Boraxbekk CJ, Wheeler M, Howard B, Dempsey PC, Lambert G, Eikelis N, Larsen R, Sethi P, Occleston J, Hernestål-Boman J, Ellis KA, Owen N, Dunstan DW. Acute effects of breaking up prolonged sitting on fatigue and cognition: a pilot study. BMJ Open 2016; 6:e009630. [PMID: 26920441 PMCID: PMC4769400 DOI: 10.1136/bmjopen-2015-009630] [Citation(s) in RCA: 92] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
OBJECTIVES To compare the acute effects of uninterrupted sitting with sitting interrupted by brief bouts of light-intensity walking on self-reported fatigue, cognition, neuroendocrine biomarkers and cardiometabolic risk markers in overweight/obese adults. DESIGN Randomised two-condition crossover trial. SETTING Laboratory study conducted in Melbourne, Australia. PARTICIPANTS 19 overweight/obese adults (45-75 years). INTERVENTIONS After an initial 2 h period seated, participants consumed a meal-replacement beverage and completed (on 2 days separated by a 6-day washout period) each condition over the next 5 h: uninterrupted sitting (sedentary condition) or sitting with 3 min bouts of light-intensity walking every 30 min (active condition). PRIMARY OUTCOME MEASURES Self-reported fatigue, executive function and episodic memory at 0 h, 4 h and 7 h. SECONDARY OUTCOME MEASURES Neuroendocrine biomarkers and cardiometabolic risk markers (blood collections at 0 h, 4 h and 7 h, blood pressure and heart rate measured hourly and interstitial glucose measured using a continuous glucose monitoring system). RESULTS During the active condition, fatigue levels were lower at 4 h (-13.32 (95% CI -23.48 to -3.16)) and at 7 h (-10.73 (95% CI -20.89 to -0.58)) compared to the sedentary condition. Heart rate was higher at 4 h (4.47 (95% CI 8.37 to 0.58)) and at 7 h (4.32 (95% CI 8.21 to 0.42)) during the active condition compared to the sedentary condition. There were no significant differences between conditions by time for other variables. In the sedentary condition, changes in fatigue scores over time correlated with a decrease in heart rate and plasma dihydroxyphenylalanine (DOPA) and an increase in plasma dihydroxyphenylglycol (DHPG). CONCLUSIONS Interrupting prolonged sitting with light-intensity walking breaks may be an effective fatigue countermeasure acutely. Fatigue levels corresponded with the heart rate and neuroendocrine biomarker changes in uninterrupted sitting in this pilot study. Further research is needed to identify potential implications, particularly for the occupational health context. TRIAL REGISTRATION NUMBER ACTRN12613000137796; Results.
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Affiliation(s)
- Patrik Wennberg
- Department of Public Health and Clinical Medicine, Umeå University, Umeå, Sweden
| | | | - Michael Wheeler
- Baker IDI Heart and Diabetes Institute, Melbourne, Australia
- School of Sport Science, Exercise & Health, University of Western Australia, Perth, Australia
| | - Bethany Howard
- Baker IDI Heart and Diabetes Institute, Melbourne, Australia
- Central Clinical School, Monash University, Melbourne, Australia
| | - Paddy C Dempsey
- Baker IDI Heart and Diabetes Institute, Melbourne, Australia
- Central Clinical School, Monash University, Melbourne, Australia
| | - Gavin Lambert
- Baker IDI Heart and Diabetes Institute, Melbourne, Australia
- Central Clinical School, Monash University, Melbourne, Australia
| | - Nina Eikelis
- Baker IDI Heart and Diabetes Institute, Melbourne, Australia
| | - Robyn Larsen
- Baker IDI Heart and Diabetes Institute, Melbourne, Australia
| | - Parneet Sethi
- Baker IDI Heart and Diabetes Institute, Melbourne, Australia
| | | | | | - Kathryn A Ellis
- The Academic Unit for Psychiatry of Old Age, Department of Psychiatry, University of Melbourne, Melbourne, Australia
| | - Neville Owen
- Baker IDI Heart and Diabetes Institute, Melbourne, Australia
- Central Clinical School, Monash University, Melbourne, Australia
- School of Population Health, The University of Queensland, Brisbane, Australia
- Melbourne School of Population and Global Health, The University of Melbourne, Melbourne, Australia
| | - David W Dunstan
- Baker IDI Heart and Diabetes Institute, Melbourne, Australia
- School of Sport Science, Exercise & Health, University of Western Australia, Perth, Australia
- Central Clinical School, Monash University, Melbourne, Australia
- School of Population Health, The University of Queensland, Brisbane, Australia
- Melbourne School of Population and Global Health, The University of Melbourne, Melbourne, Australia
- School of Exercise & Nutrition Sciences, Deakin University, Melbourne, Australia
- Mary MacKillop Institute for Health Research, Australian Catholic University, Melbourne, Australia
- Department of Epidemiology and Preventive Medicine, Monash University, Melbourne, Australia
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Johnson S, Milner D, Lopez-Lake H, Wheeler M. 244 CHONDROGENIC PELLET CULTURES FOR CARTILAGE TISSUE ENGINEERING GROW BY DEPOSITION OF MATRIX AND NOT BY CELLULAR PROLIFERATION. Reprod Fertil Dev 2016. [DOI: 10.1071/rdv28n2ab244] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Pellet cultures are commonly used to study chondrogenic differentiation in vitro. Our laboratory has demonstrated pellets made with chondrocytes grow in size during culture and produce cartilage matrix, but pellets made with adipose-derived mesenchymal stem cells (ASC) grow only slightly, producing little cartilage matrix. The objective of this study was to determine if differences in chondrocyte and ASC pellet growth result from differences in cell proliferation or in deposition of extracellular matrix. Primary chondrocytes and ASC from adult pigs were cultured in Dulbecco’s modified Eagle’s medium (DMEM) with 10% fetal bovine serum. To determine baseline proliferation rates in monolayer culture, cells were grown on coverslips in 10 µM bromodeoxyuridine (BrdU) for 24 h and immunostained for BrdU labelling. For pellet cultures, 5 × 105 cells were placed in 15 mL-conical tubes, pelleted by centrifugation in 1.0 mL of chondrogenic base media (CBM: DMEM + 40 µg mL–1 of proline, 50 µM ascorbic acid-2-phosphate, 100 nM dexamethasone, and 1× insulin-transferrin-selenium), and cultured in CBM for 1, and 4 weeks. To detect proliferation in pellets, 1- and 2-week cultured samples were labelled with 10 µM BrdU for 24 h before harvest. Pellets were fixed with 4% paraformaldehyde, embedded, and sectioned on a Leica CM1900 cryostat (Leica Microsystems, Wetzlar, Germany). To assess chondrogenic differentiation and matrix expression, sections were stained for collagen II, keratin sulfate, and chondroitin sulfate. Images were captured and distance between adjacent nuclei in 1- and 4-week pellets were measured using Zeiss imaging software. As expected, cells on coverslips showed BrdU labelling, with higher labelling in ASC cultures indicating faster proliferation (n = 5, 77.3 ± 3.74% chondrocyte v. 92.1 ± 2.88% ASC; α = 0.05; P < 0.0001; Student’s t-test). However, BrdU labelling was not seen in sections from ASC or chondrocyte pellets (n = 5), at either 1 or 2 weeks. Absence of cellular proliferation in pellets was verified by negative staining for the mitotic marker Aurora KinaseB (AurKB). Cartilage matrix staining was strong in chondrocyte pellets at all time points and absent in ASC pellets. Cell nuclei were closely packed in both ASC and chondrocyte pellets at 1 week, but a significant increase in distance between adjacent nuclei with interspersed matrix staining was noted in chondrocyte pellets at 4 weeks (n = 4, 11.88 ± 0.67 µm at 1 week v. 26.85 ± 2.06 µm at 4 weeks; α = 0.05; P < 0.0001; Student’s t-test). As TGFβ3 has been shown to induce chondrogenesis in ASC, ASC pellets were cultured in CBM + 10 ng of TGFβ3 for 1 and 2 weeks (n = 4). The TGFβ3 treatment did not induce cell proliferation in pellets, as sections were negative for BrdU. However, expression of cartilage markers keratan sulfate and chondroitin were noted. Based on our data, neither ASC nor chondrocytes proliferate in pellet culture, and chondrocyte pellet growth is due to extracellular matrix deposition.
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Stewart J, Rubessa M, Polkoff K, Lotti S, Wheeler M. 245 RISK OF TRANSMISSION OF BOVINE LEUKOSIS VIRUS (BLV) USING SEROPOSITIVE BULLS FOR IN VITRO FERTILIZATION EMBRYO PRODUCTION. Reprod Fertil Dev 2016. [DOI: 10.1071/rdv28n2ab245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Bovine leukosis virus (BLV) is a pathogen that affects the bovine immune system and leads to lymphosarcoma, leukemia, decreased milk production, and increased culling rates in cattle. BLV-infected cattle herds can be found worldwide; in the United States, specifically, 38% of beef herds, 84% of all dairy herds, and 100% of large-scale dairy operation herds are infected (Buehring et al. 2014 Emerg. Infect. Dis. 5, 772–782). The main transmission between cattle in herds is affected leukocytes in blood. Several farm practices, such as dehorning, rectal palpation, and vaccinating can lead to the pathogen transmission. Due to international trade laws and biosecurity concerns, semen from a BLV-positive bull is illegal to sell within certain countries. Prior studies have looked at use of seropositive bulls in AI with little risk in affecting the dam (Burger et al. 2000 AVJR 60, 819). Other studies used semen that was artificially infected with the virus then used for IVF (Bielanski et al. 2000 Vet. Rec. 146, 255–256). The aim of this research was to evaluate naturally infected BLV donor semen using abattoir-derived oocytes and the possible contamination of in vitro-produced (IVP) embryos. Semen was collected and frozen by a private company. Three seropositive bulls and 1 negative control bull were selected. All positive bulls were selected based on availability of seropositive BLV status. Prior to the experiment, all bulls used were evaluated for motility, concentration, and morphology. The negative control was used in prior IVF experiments that produced acceptable results for use in this experiment. Frozen sperm were thawed at 37°C for 40 s and pelleted by centrifugation (25 min at 300 × g) on a Percoll discontinuous gradient (45–80% in Tyrode’s modified medium without glucose and BSA). The matured oocytes were purchased from DeSoto Biosciences (Seymour, TN, USA) and were IVF according to standard procedures (Rubessa et al. 2011 Theriogenology 76, 1347–1355). Using 200 oocytes per replicate, the 3 positive bulls and 1 control bull were allocated 50 oocytes per bull in each replicate. After 20 to 22 h of gametes co-incubation, zygotes were denuded and cultured for 7 days in SOF, followed by the evaluation of embryos (from tight morula until hatching blastocyst). Positive bull #1 produced and tested 48 embryos. Positive bull #2 produced and tested 41 embryos. Positive bull #3 produced and tested 46 embryos. The negative control produced and tested 55 embryos. Embryonic DNA extraction was performed using standard procedures (Sattar et al. 2011 Reprod. Domest. Anim. 46, 1090–1097). Nested PCR followed the Fechner evaluations methods (Fechner et al. 1996 J. Vet. Med. B 43, 621–630). To detect BLV presence, electrophoresis was used with a 2% agarose gel containing 0.1% ethidium bromide. A total of 190 embryos were evaluated that were produced in 3 replicates. All samples analysed showed no evidence of BLV. In conclusion, use of BLV seropositive donor semen showed no transmission of the virus upon IVF of the oocytes.
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Giraldeau G, Boulate D, Banerjee D, Ariyama M, Wheeler M, Knowles J, Kobayashi Y, Perez M, Wu J, Schnittger I, Kouznetsova T, Myers J, Haddad F, Ashley E. The Independent Predictive Value of Peak Oxygen Consumption, Left ventricular Strain and Atrial Remodelling in Patients With Dilated Cardiomyopathy. J Heart Lung Transplant 2015. [DOI: 10.1016/j.healun.2015.01.509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Davis MK, Kale P, Liedtke M, Schrier S, Arai S, Wheeler M, Lafayette R, Coakley T, Witteles RM. Outcomes after heart transplantation for amyloid cardiomyopathy in the modern era. Am J Transplant 2015; 15:650-8. [PMID: 25648766 DOI: 10.1111/ajt.13025] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Revised: 09/10/2014] [Accepted: 09/12/2014] [Indexed: 01/25/2023]
Abstract
We conducted a review of patients undergoing heart transplantation (HT) at our institution for amyloid cardiomyopathy (ACM) between 2008 and 2013. Complete follow-up was available for all patients. Nineteen patients with ACM underwent HT during the study period, accounting for 9.4% of all HT performed at our institution during this period. Amyloid subtype was light chain (AL) in 9 patients and transthyretin (ATTR) in 10 (2 wild-type, 7 familial, 1 unknown). Eight of nine patients with AL amyloidosis began chemotherapy prior to HT, six have resumed chemotherapy since HT, and five have undergone autologous stem cell transplantation. Most recent free light chain levels in AL patients decreased by a median of 85% from peak values. Only one patient developed recurrent graft amyloidosis, occurring at 3.5 years post-HT and asymptomatic. After a median follow-up of 380 days, 17 (89.5%) patients are alive. To our knowledge, this is the largest single-center series reported of ACM patients undergoing HT in the modern era. Our results suggest that acceptable outcomes following HT can be achieved in the short-to-intermediate term and that this is a feasible option for end-stage ACM with careful patient selection and aggressive control of amyloidogenic light chains in AL patients.
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Affiliation(s)
- M K Davis
- Division of Cardiovascular Medicine and Stanford Cardiovascular Institute, Stanford University School of Medicine, Stanford, CA
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Pasley T, Pemberton J, Porter G, Wheeler M. Screening the asymptomatic systolic murmur. An audit of two New Zealand Centres. Heart Lung Circ 2015. [DOI: 10.1016/j.hlc.2015.06.652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Li J, Jackson CL, Yang D, Noble L, Wheeler M, MacKenzie D, Adegun T, Amin A. Comparison of tyrosine kinase receptors HER2, EGFR, and VEGFR expression in micropapillary urothelial carcinoma with invasive urothelial carcinoma. Target Oncol 2014; 10:355-63. [DOI: 10.1007/s11523-014-0341-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2014] [Accepted: 09/25/2014] [Indexed: 01/30/2023]
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Maxim P, Wheeler M, Maguire P, Loo B. WE-E-BRE-02: BEST IN PHYSICS (THERAPY) - Stereotactic Radiotherapy for Renal Sympathetic Ablation for the Treatment of Refractory Hypertension. Med Phys 2014. [DOI: 10.1118/1.4889431] [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: 11/07/2022] Open
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Joharatnam N, Mcwilliams D, Wilson D, Wheeler M, Pande I, Walsh D. SAT0132 Pain Sensitivity, Disease Activity Assessment and Fibromyalgia Status in Rheumatoid Arthritis. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.3254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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