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Fu Y, Farnham J, Li W, Powers B, Humphries D, Picard F. LC-MS/MS Bioanalysis of Radioligand Therapeutic Drug Candidate for Preclinical Toxicokinetic Assessment. Anal Chem 2023. [PMID: 37402311 DOI: 10.1021/acs.analchem.3c02163] [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: 07/06/2023]
Abstract
Radioligand therapy (RLT) has gained significant momentum in recent years in the diagnosis, treatment, and monitoring of cancers. In preclinical development, the safety profile of RLT drug candidate(s) is investigated at relatively low dose levels using the cold (non-radioactive, e.g., 175Lu) ligand as a surrogate of the hot (radioactive, e.g., 177Lu) one in the "ligand-linker-chelator" complex. The formulation of the test article used in preclinical safety studies contains a mixture of free ligand (i.e., ligand-linker-chelator without metal) and cold ligand (i.e., ligand-linker-chelator with non-radioactive metal) in a similar molar ratio as seen under the manufacturing conditions for the RLT drug for clinical use, where only a fraction of free ligand molecules chelate the radioactive metal to form a hot ligand. In this very first report of LC-MS/MS bioanalysis of RLT molecules in support of a regulated preclinical safety assessment study, a highly selective and sensitive LC-MS/MS bioanalytical method was developed for the simultaneous determination of free ligand (NVS001) and cold ligand (175Lu-NVS001) in rat and dog plasma. Several unexpected technical challenges in relation to LC-MS/MS of RLT molecules were successfully addressed. The challenges include poor assay sensitivity of the free ligand NVS001, formation of the free ligand (NVS001) with endogenous metal (e.g., potassium), Ga loss from the Ga-chelated internal standard during sample extraction and analysis, "instability" of the analytes at low concentrations, and inconsistent IS response in the extracted plasma samples. The methods were validated according to the current regulatory requirements in a dynamic range of 0.5-250 ng/mL for both the free and cold ligands using a 25 μL sample volume. The validated method was successfully implemented in sample analysis in support of regulated safety studies, with very good results from incurred sample reanalysis. The current LC-MS/MS workflow can be expanded to quantitative analysis of other RLTs in support of preclinical RLT drug development.
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Affiliation(s)
- Yunlin Fu
- Pharmacokinetic Sciences─Drug Disposition, Novartis Institutes for BioMedical Research, One Health Plaza, East Hanover, New Jersey 07936, United States
| | - James Farnham
- Labcorp Drug Development, 3301 Kinsman Boulevard, Madison, Wisconsin 53704, United States
| | - Wenkui Li
- Pharmacokinetic Sciences─Drug Disposition, Novartis Institutes for BioMedical Research, One Health Plaza, East Hanover, New Jersey 07936, United States
| | - Brendan Powers
- Labcorp Drug Development, 3301 Kinsman Boulevard, Madison, Wisconsin 53704, United States
| | - David Humphries
- Labcorp Drug Development, 3301 Kinsman Boulevard, Madison, Wisconsin 53704, United States
| | - Franck Picard
- Pharmacokinetic Sciences─Drug Disposition, Novartis Institutes for BioMedical Research, Basel CH-4056, Switzerland
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Rigby H, Dowding A, Fernandes A, Humphries D, Petch RG, Reynolds CK, Rose M, Smith SR. Transfer of polychlorinated, brominated and mixed-halogenated dioxins, furans and biphenyls, polychlorinated naphthalenes and alkanes, polycyclic aromatic hydrocarbons and chlorobenzenes to the milk of dairy cattle from controlled ingestion of industrial and municipal bioresources recycled to agricultural land. Sci Total Environ 2023; 886:163546. [PMID: 37080322 DOI: 10.1016/j.scitotenv.2023.163546] [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: 10/10/2022] [Revised: 04/11/2023] [Accepted: 04/13/2023] [Indexed: 05/03/2023]
Abstract
Recycled bioresources (biosolids, compost-like-output, meat and bonemeal ash, poultry litter ash, paper sludge ash) were added to the feed of dairy cattle to simulate incidental ingestion from agricultural utilisation, to investigate the transfer of organic contaminants from the ingested materials to milk. The bioresources were blended with a loamy sand soil at agronomic rates to simulate a single application to land, which was added to the diet at 5 % of the total intake on a dry matter (DM) basis. Biosolids, and control treatments consisting of unamended soil, were also added directly to the feed at 5 % DM. The cattle were fed the bioresource amended diets for a target period of three to four weeks, depending on material, and monitoring continued for four weeks after treatment withdrawal. Milk samples were taken weekly with chemical analysis of selected samples for a range of organic contaminants including: polychlorinated, polybrominated and mixed-halogenated dioxins, furans and biphenyls, polychlorinated naphthalenes and alkanes (often called chlorinated paraffins), polycyclic aromatic hydrocarbons and chlorobenzenes. No statistically significant additional transfer of organic contaminants to the milk was detected when bioresources were blended with soil due to the relatively low levels of contaminants present when the bioresources were blended with soil at agronomic rates. However, direct biosolids ingestion by cattle significantly increased the transfer of contaminants to milk in comparison to control animals. Although present in larger concentrations in biosolids than their chlorinated counterparts, the carry over rates and bioconcentration factors for brominated dioxins and furans were considerably smaller. Direct ingestion of biosolids resulted in most contaminants approaching, but not always completely reaching, steady state concentrations within the treatment feeding period, however, concentrations generally declined to control values within four-weeks after withdrawing the biosolids-amended diet.
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Affiliation(s)
- Hannah Rigby
- Imperial College Consultants Ltd., 58 Prince's Gate, Exhibition Road, London SW7 2PG, UK
| | - Alan Dowding
- Chemical Contaminants and Residues Branch, Food Safety Policy, Food Standards Agency, Clive House, 70 Petty France, London SW1H 9EX, UK
| | | | - David Humphries
- The University of Reading, School of Agriculture, Policy and Development, Centre for Dairy Research, PO Box 237, Earley Gate, Reading, Berkshire RG6 6AR, UK
| | | | - Christopher K Reynolds
- The University of Reading, School of Agriculture, Policy and Development, Centre for Dairy Research, PO Box 237, Earley Gate, Reading, Berkshire RG6 6AR, UK
| | - Martin Rose
- Fera Science Ltd., Sand Hutton, York YO41 1LZ, UK
| | - Stephen R Smith
- Imperial College Consultants Ltd., 58 Prince's Gate, Exhibition Road, London SW7 2PG, UK.
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Gamage PJ, Seker S, Orchard J, Humphries D, Fitzgerald K, Fitzpatrick J. Insights into the complexity of presentation and management of patients: the Sport and Exercise Physician's perspective. BMJ Open Sport Exerc Med 2021; 7:e001228. [PMID: 34925878 PMCID: PMC8628332 DOI: 10.1136/bmjsem-2021-001228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/08/2021] [Indexed: 11/21/2022] Open
Abstract
Objectives Sport and Exercise Physicians represent a relatively new specialty focusing on exercise in complex diseases including musculoskeletal diseases. Our objective was to describe the characteristics, type and complexity of patient presentations, their management strategies and referral information in Australian practice. Methods A cross-sectional study including a cohort of 11 senior Sport and Exercise Physicians in Australia studied all new patient consultations within an 8-week period. Data were analysed relating to presentation, referral source, follow-up referrals, and patient management strategies. Results Data from 419 patients were recorded. The majority, 97% (n=406), had musculoskeletal conditions, 53% (n=222) had one or more associated comorbidities and 47% (n=195) had ongoing symptoms for >12 months. Most patients, 82% (n=355), were referred by general practitioners. Prior consultations included physiotherapy 72% (n=301) and orthopaedic 20% (n=85). A multidisciplinary network of referrals from Sport and Exercise Physicians was observed, including 210 referrals to 9 allied health specialities and 61 referrals to 17 medical specialities. Over 74% (n=311) of patients received exercise-based intervention as part of the treatment plan, including 57% (n=240) physician managed exercise interventions. Conclusion Our work shines a light on the nature and complexity of the role of Sport and Exercise Physicians in an Australian practice context. Findings will assist in implementing measures to promote patient care at the community level in managing musculoskeletal conditions. Sport and exercise medicine stakeholders and government policy makers can use this information in developing appropriate programmes to support patients and create integrated sport and exercise medicine services for the community.
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Affiliation(s)
- Prasanna J Gamage
- Australasian College of Sport and Exercise Physicians, Melbourne, Victoria, Australia.,School of Medical and Health Sciences, Edith Cowan University, Joondalup, Western Australia, Australia
| | - Saran Seker
- Australasian College of Sport and Exercise Physicians, Melbourne, Victoria, Australia
| | - Jessica Orchard
- Agnes Ginges Centre for Molecular Cardiology at Centenary Institute, The University of Sydney, Sydney, New South Wales, Australia
| | - David Humphries
- Australasian College of Sport and Exercise Physicians, Melbourne, Victoria, Australia.,School of Medicine, College of Health and Medicine, University of Tasmania, Hobart, Tasmania, Australia
| | - Kylie Fitzgerald
- Australasian College of Sport and Exercise Physicians, Melbourne, Victoria, Australia.,School of Health & Biomedical Sciences, RMIT University, Melbourne, Victoria, Australia
| | - Jane Fitzpatrick
- Australasian College of Sport and Exercise Physicians, Melbourne, Victoria, Australia.,Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Melbourne, Victoria, Australia
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Liu X, Robbins S, Wang X, Virk S, Schuck K, Deveza LA, Oo WM, Carmichael K, Antony B, Eckstein F, Wirth W, Little C, Linklater J, Harris A, Humphries D, O'Connell R, Heller G, Buttel T, Lohmander S, Ding C, Hunter DJ. Efficacy and cost-effectiveness of Stem Cell injections for symptomatic relief and strUctural improvement in people with Tibiofemoral knee OsteoaRthritis: protocol for a randomised placebo-controlled trial (the SCUlpTOR trial). BMJ Open 2021; 11:e056382. [PMID: 34845081 PMCID: PMC8633994 DOI: 10.1136/bmjopen-2021-056382] [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] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
INTRODUCTION Knee osteoarthritis (KOA) is a highly prevalent disabling joint disease. Intra-articular stem cell therapy is increasingly being used for treating KOA with little high-quality evidence to support its use. The aim of this study is to investigate the efficacy, safety and cost-effectiveness of allogeneic mesenchymal stem cells (Cymerus MSCs) for treating symptomatic tibiofemoral KOA and improving knee structure over 24 months. METHODS AND ANALYSIS The Stem Cell injections for symptomatic relief and strUctural improvement in people with Tibiofemoral knee OsteoaRthritis study is a phase III, multi-centre, parallel, superiority, randomised, double-blind, placebo-controlled trial, which will be conducted in Sydney and Hobart, Australia. 440 participants (220 per arm) aged over 40 years with painful KOA and mild to moderate structural change on X-ray (Kellgren and Lawrence grade 2 or 3) with medial minimum joint space width between 1 and 4 mm in the study knee will be recruited from the community and randomly allocated to receive either intra-articular MSCs or saline at baseline, week 3 and week 52. The coprimary outcomes will be the proportion of participants achieving patient-acceptable symptom state for knee pain at 24 months and quantitative central medial femorotibial compartment cartilage thickness change from baseline to 24 months. Main secondary outcomes include change in knee pain, Patient Global Assessment, physical function, quality of life and other structural changes. Additional data for cost-effectiveness analysis will also be recorded. Adverse events will be monitored throughout the study. The primary analysis will be conducted using modified intention-to-treat. ETHICS AND DISSEMINATION This protocol has been approved by The University of Sydney (USYD) Human Research Ethics Committee (HREC) #: 2020/119 and The University of Tasmania (UTAS) HREC #: H0021868. All participants will be required to provide informed consent. Dissemination will occur through conferences, social media, and scientific publications. TRIAL REGISTRATION NUMBERS Australian New Zealand Clinical Trials Registry (ACTRN12620000870954); U1111-1234-4897.
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Affiliation(s)
- Xiaoqian Liu
- Department of Rheumatology, Royal North Shore Hospital, Northern Clinical School, Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales, Australia
- Institute of Bone and Joint Research, Kolling Institute of Medical Research, The University of Sydney, Sydney, New South Wales, Australia
| | - Sarah Robbins
- Department of Rheumatology, Royal North Shore Hospital, Northern Clinical School, Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales, Australia
- Institute of Bone and Joint Research, Kolling Institute of Medical Research, The University of Sydney, Sydney, New South Wales, Australia
| | - Xia Wang
- Department of Rheumatology, Royal North Shore Hospital, Northern Clinical School, Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales, Australia
- Institute of Bone and Joint Research, Kolling Institute of Medical Research, The University of Sydney, Sydney, New South Wales, Australia
| | - Sonika Virk
- Department of Rheumatology, Royal North Shore Hospital, Northern Clinical School, Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales, Australia
- Institute of Bone and Joint Research, Kolling Institute of Medical Research, The University of Sydney, Sydney, New South Wales, Australia
| | - Karen Schuck
- Department of Rheumatology, Royal North Shore Hospital, Northern Clinical School, Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales, Australia
- Institute of Bone and Joint Research, Kolling Institute of Medical Research, The University of Sydney, Sydney, New South Wales, Australia
| | - Leticia A Deveza
- Department of Rheumatology, Royal North Shore Hospital, Northern Clinical School, Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales, Australia
- Institute of Bone and Joint Research, Kolling Institute of Medical Research, The University of Sydney, Sydney, New South Wales, Australia
| | - Win Min Oo
- Department of Rheumatology, Royal North Shore Hospital, Northern Clinical School, Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales, Australia
- Institute of Bone and Joint Research, Kolling Institute of Medical Research, The University of Sydney, Sydney, New South Wales, Australia
| | - Kirsty Carmichael
- Menzies Institute for Medical Research, University of Tasmania, Hobart, Tasmania, Australia
| | - Benny Antony
- Menzies Institute for Medical Research, University of Tasmania, Hobart, Tasmania, Australia
| | - Felix Eckstein
- Institute of Anatomy and Cell Biology and Ludwig Boltzmann Institute for Arthritis and Rehabilitation, Paracelsus Medical University Salzburg, Salzburg, Austria
- Chondrometrics GmbH, Freilassing, Germany
| | - Wolfgang Wirth
- Institute of Anatomy and Cell Biology and Ludwig Boltzmann Institute for Arthritis and Rehabilitation, Paracelsus Medical University Salzburg, Salzburg, Austria
- Chondrometrics GmbH, Freilassing, Germany
| | - Christopher Little
- Raymond Purves Bone and Joint Research Labs, Kolling Institute of Medical Research, Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales, Australia
| | - James Linklater
- Castlereagh Imaging, St Leonards, Sydney, New South Wales, Australia
| | - Anthony Harris
- Centre for Health Economics, Monash University, Clayton, Victoria, Australia
| | - David Humphries
- School of Medicine, College of Health and Medicine, University of Tasmania Faculty of Health, Hobart, Tasmania, Australia
| | - R O'Connell
- NHMRC Clinical Trials Centre, The University of Sydney, Sydney, New South Wales, Australia
| | - Gillian Heller
- NHMRC Clinical Trials Centre, The University of Sydney, Sydney, New South Wales, Australia
| | - Thomas Buttel
- Representative of People with Knee Osteoarthritis, Sydney, New South Wales, Australia
| | - Stefan Lohmander
- Department of Clinical Sciences Lund, Orthopaedics, Lund University, Lund, Sweden
| | - Changhai Ding
- Menzies Institute for Medical Research, University of Tasmania, Hobart, Tasmania, Australia
- Clinical Research Centre, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - David J Hunter
- Department of Rheumatology, Royal North Shore Hospital, Northern Clinical School, Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales, Australia
- Institute of Bone and Joint Research, Kolling Institute of Medical Research, The University of Sydney, Sydney, New South Wales, Australia
- Clinical Research Centre, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, China
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5
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Aitken D, Balogun S, Foong YC, Humphries D, Laslett L, Pitchford N, Khan H, Martel-Pelletier J, Pelletier JP, Abram F, Jin X, Jones G, Winzenberg T. Clinical relevance of MRI knee abnormalities in Australian rules football players: a longitudinal study. BMJ Open Sport Exerc Med 2021; 7:e001097. [PMID: 34631145 PMCID: PMC8483025 DOI: 10.1136/bmjsem-2021-001097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/30/2021] [Indexed: 11/21/2022] Open
Abstract
Background/Aim The clinical relevance of MRI knee abnormalities in athletes is unclear. This study aimed to determine the prevalence of MRI knee abnormalities in Australian Rules Football (ARF) players and describe their associations with pain, function, past and incident injury and surgery history. Methods 75 male players (mean age 21, range 16–30) from the Tasmanian State Football League were examined early in the playing season (baseline). History of knee injury/surgery and knee pain and function were assessed. Players underwent MRI scans of both knees at baseline. Clinical measurements and MRI scans were repeated at the end of the season, and incident knee injuries during the season were recorded. Results MRI knee abnormalities were common at baseline (67% bone marrow lesions, 16% meniscal tear/extrusion, 43% cartilage defects, 67% effusion synovitis). Meniscal tears/extrusion and synovial fluid volume were positively associated with knee symptoms, but these associations were small in magnitude and did not persist after further accounting for injury history. Players with a history of injury were at a greater risk of having meniscal tears/extrusion, effusion synovitis and greater synovial fluid volume. In contrast, players with a history of surgery were at a greater risk of having cartilage defects and meniscal tears/extrusion. Incident injuries were significantly associated with worsening symptoms, BML development and incident meniscal damage. Conclusions MRI abnormalities are common in ARF players, are linked to a previous knee injury and surgery history, as well as incident injury but do not dictate clinical symptomatology.
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Affiliation(s)
- Dawn Aitken
- Menzies Institute for Medical Research, University of Tasmania, Hobart, Tasmania, Australia
| | - Saliu Balogun
- National Centre for Epidemiology and Population Health, Australian National University, Canberra, Australian Capital Territory, Australia
| | - Yi Chao Foong
- Menzies Institute for Medical Research, University of Tasmania, Hobart, Tasmania, Australia.,University Hospital Geelong, Geelong, Victoria, Australia
| | | | - Laura Laslett
- Menzies Institute for Medical Research, University of Tasmania, Hobart, Tasmania, Australia
| | - Nathan Pitchford
- School of Health Sciences, University of Tasmania, Hobart, Tasmania, Australia
| | - Hussain Khan
- Menzies Institute for Medical Research, University of Tasmania, Hobart, Tasmania, Australia
| | - Johanne Martel-Pelletier
- Osteoarthritis Research Unit, University of Montreal Hospital Centre Research Centre, Montreal, Québec, Canada
| | - Jean-Pierre Pelletier
- Osteoarthritis Research Unit, University of Montreal Hospital Centre Research Centre, Montreal, Québec, Canada
| | - Francois Abram
- Medical Imaging Research & Development, ArthroLab Inc, Montreal, Québec, Canada
| | - Xingzhong Jin
- Centre for Big Data Research in Health, University of New South Wales, Sydney, New South Wales, Australia
| | - Graeme Jones
- Menzies Institute for Medical Research, University of Tasmania, Hobart, Tasmania, Australia
| | - Tania Winzenberg
- Menzies Institute for Medical Research, University of Tasmania, Hobart, Tasmania, Australia
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Qin N, Faludi G, Beauclercq S, Pitt J, Desnica N, Pétursdóttir Á, Newton EE, Angelidis A, Givens I, Juniper D, Humphries D, Gunnlaugsdóttir H, Stergiadis S. Macromineral and trace element concentrations and their seasonal variation in milk from organic and conventional dairy herds. Food Chem 2021; 359:129865. [PMID: 33940467 DOI: 10.1016/j.foodchem.2021.129865] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [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: 10/13/2020] [Revised: 03/31/2021] [Accepted: 03/31/2021] [Indexed: 10/21/2022]
Abstract
To study the effects of dairy production system on milk macromineral and trace element concentrations, milk samples were collected monthly in 2019 from 43 conventional and 27 organic farms. Organic milk contained more Ca (1049.5 vs. 995.8 mg/kg), K (1383.6 vs. 1362.4 mg/kg), P (806.5 vs. 792.5 mg/kg) and Mo (73.3 vs. 60.6 μg/kg) but less Cu (52.4 vs. 60.6 μg/kg), Fe (0.66 vs 2.03 mg/kg), Mn (28.8 vs. 45.0 μg/kg), Zn (4.51 vs. 5.00 mg/kg) and Al (0.32 vs. 1.14 μg/kg) than conventional milk. Significant seasonal variation was observed in all determined minerals' concentrations. Milk I concentration was not consistently affected by production system, whereas organic milk contained less I in June and July than conventional milk. Dietary factors contributing to different milk mineral concentrations between production systems included intakes of maize silage, dry-straights and oils (higher in conventional diets), and pasture, clover and wholecrop (higher in organic diets).
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Affiliation(s)
- Nanbing Qin
- Department of Animal Sciences, School of Agriculture, Policy and Development, University of Reading, PO Box 237, Earley Gate, Reading RG6 6EU, United Kingdom
| | - Gergely Faludi
- Department of Animal Sciences, School of Agriculture, Policy and Development, University of Reading, PO Box 237, Earley Gate, Reading RG6 6EU, United Kingdom; Hungarian University of Agriculture and Life Sciences, Georgikon Campus, Keszthely, Deák Ferenc u. 16, H-8360, Hungary
| | - Stephane Beauclercq
- Department of Animal Sciences, School of Agriculture, Policy and Development, University of Reading, PO Box 237, Earley Gate, Reading RG6 6EU, United Kingdom
| | - Joe Pitt
- Department of Animal Sciences, School of Agriculture, Policy and Development, University of Reading, PO Box 237, Earley Gate, Reading RG6 6EU, United Kingdom
| | | | | | - Eric E Newton
- Department of Animal Sciences, School of Agriculture, Policy and Development, University of Reading, PO Box 237, Earley Gate, Reading RG6 6EU, United Kingdom
| | - Angelos Angelidis
- Department of Animal Sciences, School of Agriculture, Policy and Development, University of Reading, PO Box 237, Earley Gate, Reading RG6 6EU, United Kingdom
| | - Ian Givens
- Institute for Food, Nutrition and Health, University of Reading, PO Box 237, Earley Gate, Reading RG6 6EU, United Kingdom
| | - Darren Juniper
- Department of Animal Sciences, School of Agriculture, Policy and Development, University of Reading, PO Box 237, Earley Gate, Reading RG6 6EU, United Kingdom
| | - David Humphries
- Centre for Dairy Research, School of Agriculture, Policy and Development, University of Reading, Hall Farm House, Church Ln, Reading RG2 9HX, United Kingdom
| | - Helga Gunnlaugsdóttir
- Matís ltd., Vínlandsleið 12, Reykjavík 113, Iceland; Faculty Food Science and Nutrition, University Iceland, Reykjavik, Iceland
| | - Sokratis Stergiadis
- Department of Animal Sciences, School of Agriculture, Policy and Development, University of Reading, PO Box 237, Earley Gate, Reading RG6 6EU, United Kingdom.
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Rigby H, Dowding A, Fernandes A, Humphries D, Jones NR, Lake I, Petch RG, Reynolds CK, Rose M, Smith SR. Concentrations of organic contaminants in industrial and municipal bioresources recycled in agriculture in the UK. Sci Total Environ 2021; 765:142787. [PMID: 33246727 DOI: 10.1016/j.scitotenv.2020.142787] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Revised: 08/14/2020] [Accepted: 09/30/2020] [Indexed: 06/12/2023]
Abstract
Many types of bioresource materials are beneficially recycled in agriculture for soil improvement and as alternative bedding materials for livestock, but they also potentially transfer contaminants into plant and animal foods. Representative types of industrial and municipal bioresources were selected to assess the extent of organic chemical contamination, including: (i) land applied materials: treated sewage sludge (biosolids), meat and bone meal ash (MBMA), poultry litter ash (PLA), paper sludge ash (PSA) and compost-like-output (CLO), and (ii) bedding materials: recycled waste wood (RWW), dried paper sludge (DPS), paper sludge ash (PSA) and shredded cardboard. The materials generally contained lower concentrations of polychlorinated dibenzo-p-dioxins/dibenzofurans (PCDD/Fs) and dioxin-like polychlorinated biphenyls (PCBs) relative to earlier reports, indicating the decline in environmental emissions of these established contaminants. However, concentrations of polycyclic aromatic hydrocarbons (PAHs) remain elevated in biosolids samples from urban catchments. Polybrominated dibenzo-p-dioxins/dibenzofurans (PBDD/Fs) were present in larger amounts in biosolids and CLO compared to their chlorinated counterparts and hence are of potentially greater significance in contemporary materials. The presence of non-ortho-polychlorinated biphenyls (PCBs) in DPS was probably due to non-legacy sources of PCBs in paper production. Flame retardent chemicals were one of the most significant and extensive groups of contaminants found in the bioresource materials. Decabromodiphenylether (deca-BDE) was the most abundant polybrominated diphenyl ether (PBDE) and may explain the formation and high concentrations of PBDD/Fs detected. Emerging flame retardant compounds, including: decabromodiphenylethane (DBDPE) and organophosphate flame retardants (OPFRs), were also detected in several of the materials. The profile of perfluoroalkyl substances (PFAS) depended on the type of waste category; perfluoroundecanoic acid (PFUnDA) was the most significant PFAS for DPS, whereas perfluorooctane sulfonate (PFOS) was dominant in biosolids and CLO. The concentrations of polychlorinated alkanes (PCAs) and di-2-ethylhexyl phthalate (DEHP) were generally much larger than the other contaminants measured, indicating that there are major anthropogenic sources of these potentially hazardous chemicals entering the environment. The study results suggest that continued vigilance is required to control emissions and sources of these contaminants to support the beneficial use of secondary bioresource materials.
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Affiliation(s)
- Hannah Rigby
- Imperial College Consultants Ltd., 58 Prince's Gate, Exhibition Road, London SW7 2PG, UK
| | - Alan Dowding
- Chemical Contaminants and Residues Branch, Food Safety Policy, Food Standards Agency, Clive House, 70 Petty France, London SW1H 9EX, UK
| | - Alwyn Fernandes
- The Food and Environment Research Agency (Fera), Sand Hutton, York YO41 1LZ, UK; University of East Anglia, School of Environmental Sciences, Norwich NR4 7TJ, UK
| | - David Humphries
- The University of Reading, School of Agriculture, Policy and Development, Centre for Dairy Research, POB 237, Reading, Berkshire RG6 6AR, UK
| | - Natalia R Jones
- University of East Anglia, School of Environmental Sciences, Norwich NR4 7TJ, UK
| | - Iain Lake
- University of East Anglia, School of Environmental Sciences, Norwich NR4 7TJ, UK
| | - Rupert G Petch
- The Food and Environment Research Agency (Fera), Sand Hutton, York YO41 1LZ, UK
| | - Christopher K Reynolds
- The University of Reading, School of Agriculture, Policy and Development, Centre for Dairy Research, POB 237, Reading, Berkshire RG6 6AR, UK
| | - Martin Rose
- The Food and Environment Research Agency (Fera), Sand Hutton, York YO41 1LZ, UK
| | - Stephen R Smith
- Imperial College Consultants Ltd., 58 Prince's Gate, Exhibition Road, London SW7 2PG, UK.
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Humphries D, Jaques R, Dijkstra HP, Asif I, Batt ME, Borjesson M, Ergen E, Geertsema C, Gojanovic B, Ionescu A, Janse van Rensburg DC, Lebrun C, Mohamed NA, Mountjoy M, Parikh T, Robinson D, Sallis R, Schwellnus M, Sheeran P. Delphi developed syllabus for the medical specialty of sport and exercise medicine: part 2. Br J Sports Med 2020; 55:81-83. [DOI: 10.1136/bjsports-2020-102102] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/07/2020] [Indexed: 11/04/2022]
Abstract
Training in the medical specialty of sport and exercise medicine (SEM) is available in many, but not all countries. In 2015, an independent Delphi group, the International Syllabus in Sport and Exercise Medicine Group (ISSEMG), was formed to create a basic syllabus for this medical specialty. The group provided the first part of this syllabus, by identifying 11 domains and a total of 80 general learning areas for the specialty, in December 2017. The next step in this process, and the aim of this paper was to determine the specific learning areas for each of the 80 general learning areas. A group of 26 physicians with a range of primary medical specialty qualifications including, Sport and Exercise Medicine, Family Medicine, Internal Medicine, Cardiology, Rheumatology and Anaesthetics were invited to participate in a multiple round online Delphi study to develop specific learning areas for each of the previously published general learning areas. All invitees have extensive clinical experience in the broader sports medicine field, and in one or more components of sports medicine governance at national and/or international level. SEM, Family Medicine, Internal Medicine, Cardiology, Rheumatology and Anaesthetics were invited to participate in a multiple round online Delphi study to develop specific learning areas for each of the previously published general learning areas. All invitees have extensive clinical experience in the broader sports medicine field, and in one or more components of sports medicine governance at national and/or international level. The hierarchical syllabus developed by the ISSEMG provides a useful resource in the planning, development and delivery of specialist training programmes in the medical specialty of SEM.
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Zeuner MT, Didenko NN, Humphries D, Stergiadis S, Morash TM, Patel K, Grimm WD, Widera D. Isolation and Characterization of Neural Crest-Derived Stem Cells From Adult Ovine Palatal Tissue. Front Cell Dev Biol 2018; 6:39. [PMID: 29696142 PMCID: PMC5904732 DOI: 10.3389/fcell.2018.00039] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Accepted: 03/23/2018] [Indexed: 12/16/2022] Open
Abstract
Adult mammalian craniofacial tissues contain limited numbers of post-migratory neural crest-derived stem cells. Similar to their embryonic counterparts, these adult multipotent stem cells can undergo multi-lineage differentiation and are capable of contributing to regeneration of mesodermal and ectodermal cells and tissues in vivo. In the present study, we describe for the first time the presence of Nestin-positive neural crest-derived stem cells (NCSCs) within the ovine hard palate. We show that these cells can be isolated from the palatal tissue and are able to form neurospheres. Ovine NCSCs express the typical neural crest markers Slug and Twist, exhibit high proliferative and migratory activity and are able to differentiate into α smooth muscle cells and β-III-tubulin expressing ectodermal cells. Finally, we demonstrate that oNCSCs are capable of differentiating into osteogenic, adipogenic and chondrogenic cells. Taken together, our results suggest that oNCSCs could be used as model cells to assess the efficacy and safety of autologous NCSC transplantation in a large animal model.
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Affiliation(s)
- Marie-Theres Zeuner
- Stem Cell Biology and Regenerative Medicine, School of Pharmacy, University of Reading, Reading, United Kingdom
| | - Nikolai N Didenko
- Stem Cell Lab, Department for Personalized Medicine, Scientific Innovation Centre, Stavropol State Medical University, Stavropol, Russia
| | - David Humphries
- Centre for Dairy Research, School of Agriculture, Policy and Development, University of Reading, Reading, United Kingdom
| | - Sokratis Stergiadis
- Animal, Dairy and Food Chain Sciences Research Group, Centre for Dairy Research, School of Agriculture, Policy and Development, University of Reading, Reading, United Kingdom
| | - Taryn M Morash
- Skeletal Muscle Development Group, School of Biological Sciences, University of Reading, Reading, United Kingdom
| | - Ketan Patel
- Skeletal Muscle Development Group, School of Biological Sciences, University of Reading, Reading, United Kingdom
| | - Wolf-Dieter Grimm
- Stem Cell Lab, Department for Personalized Medicine, Scientific Innovation Centre, Stavropol State Medical University, Stavropol, Russia.,Periodontology, Department of Dental Medicine, Faculty of Health, University of Witten/Herdecke, Witten, Germany
| | - Darius Widera
- Stem Cell Biology and Regenerative Medicine, School of Pharmacy, University of Reading, Reading, United Kingdom
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Humphries D, Jaques R, Dijkstra HP. A Delphi developed syllabus for the medical specialty of sport and exercise medicine. Br J Sports Med 2017; 52:490-492. [DOI: 10.1136/bjsports-2017-098477] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/30/2017] [Indexed: 11/03/2022]
Abstract
Training in the medical specialty of sport and exercise medicine is now available in many, but not all countries. Lack of resources may be a barrier to the development of this important specialty field and the International Syllabus in Sport and Exercise Medicine Group was convened to reduce one potential barrier, the need to develop a syllabus. The group is composed of 17 sport and exercise medicine specialists residing in 12 countries (Australia, Canada, India, Ireland, Malaysia, the Netherlands, Qatar, South Africa, Sweden, Switzerland, the UK and USA). This paper presents the first phase of this project covering the domains and general learning areas of a specialist training syllabus in sport and exercise medicine.
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Foong Y, Aitken D, Humphries D, Laslett L, Pitchford N, Khan H, Abram F, Pelletier J, Martel-Pelletier J, Jin X, Jones G, Winzenberg T. Knee function, pain and magnetic resonance imaging abnormalities in Australian Rules Football players: a cohort study. Intern Med J 2017. [DOI: 10.1111/imj.5_13463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Y Foong
- Menzies Institute for Medical Research; University of Tasmania; Hobart Tasmania Australia
- Royal Hobart Hospital; Hobart Tasmania Australia
| | - D Aitken
- Menzies Institute for Medical Research; University of Tasmania; Hobart Tasmania Australia
| | - D Humphries
- The Sports Medicine Practice; Hobart Tasmania Australia
| | - L Laslett
- Menzies Institute for Medical Research; University of Tasmania; Hobart Tasmania Australia
| | - N Pitchford
- Institute of Sport Exercise and Active Living (ISEAL); Victoria, University Footscray Park Campus Footscray Victoria Australia
| | - H Khan
- Menzies Institute for Medical Research; University of Tasmania; Hobart Tasmania Australia
| | - F Abram
- Medical Imaging Research & Development; ArthroLab Inc.; Montreal Quebec Canada
| | - J Pelletier
- Osteoarthritis Research Unit; University of Montreal Hospital Research Centre (CRCHUM); Montreal Quebec Canada
| | - J Martel-Pelletier
- Osteoarthritis Research Unit; University of Montreal Hospital Research Centre (CRCHUM); Montreal Quebec Canada
| | - X Jin
- Australian Institute of Health Innovation; Macquarie University; Sydney Australia
| | - G Jones
- Menzies Institute for Medical Research; University of Tasmania; Hobart Tasmania Australia
| | - T Winzenberg
- Menzies Institute for Medical Research; University of Tasmania; Hobart Tasmania Australia
- Faculty of Health; University of Tasmania; Hobart Tasmania Australia
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Headley JV, Peru KM, Mohamed MH, Frank RA, Martin JW, Hazewinkel RRO, Humphries D, Gurprasad NP, Hewitt LM, Muir DCG, Lindeman D, Strub R, Young RF, Grewer DM, Whittal RM, Fedorak PM, Birkholz DA, Hindle R, Reisdorph R, Wang X, Kasperski KL, Hamilton C, Woudneh M, Wang G, Loescher B, Farwell A, Dixon DG, Ross M, Pereira ADS, King E, Barrow MP, Fahlman B, Bailey J, McMartin DW, Borchers CH, Ryan CH, Toor NS, Gillis HM, Zuin L, Bickerton G, Mcmaster M, Sverko E, Shang D, Wilson LD, Wrona FJ. Chemical fingerprinting of naphthenic acids and oil sands process waters-A review of analytical methods for environmental samples. J Environ Sci Health A Tox Hazard Subst Environ Eng 2013; 48:1145-1163. [PMID: 23647107 DOI: 10.1080/10934529.2013.776332] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
This article provides a review of the routine methods currently utilized for total naphthenic acid analyses. There is a growing need to develop chemical methods that can selectively distinguish compounds found within industrially derived oil sands process affected waters (OSPW) from those derived from the natural weathering of oil sands deposits. Attention is thus given to the characterization of other OSPW components such as oil sands polar organic compounds, PAHs, and heavy metals along with characterization of chemical additives such as polyacrylamide polymers and trace levels of boron species. Environmental samples discussed cover the following matrices: OSPW containments, on-lease interceptor well systems, on- and off-lease groundwater, and river and lake surface waters. There are diverse ranges of methods available for analyses of total naphthenic acids. However, there is a need for inter-laboratory studies to compare their accuracy and precision for routine analyses. Recent advances in high- and medium-resolution mass spectrometry, concomitant with comprehensive mass spectrometry techniques following multi-dimensional chromatography or ion-mobility separations, have allowed for the speciation of monocarboxylic naphthenic acids along with a wide range of other species including humics. The distributions of oil sands polar organic compounds, particularly the sulphur containing species (i.e., OxS and OxS2) may allow for distinguishing sources of OSPW. The ratios of oxygen- (i.e., Ox) and nitrogen-containing species (i.e., NOx, and N2Ox) are useful for differentiating organic components derived from OSPW from natural components found within receiving waters. Synchronous fluorescence spectroscopy also provides a powerful screening technique capable of quickly detecting the presence of aromatic organic acids contained within oil sands naphthenic acid mixtures. Synchronous fluorescence spectroscopy provides diagnostic profiles for OSPW and potentially impacted groundwater that can be compared against reference groundwater and surface water samples. Novel applications of X-ray absorption near edge spectroscopy (XANES) are emerging for speciation of sulphur-containing species (both organic and inorganic components) as well as industrially derived boron-containing species. There is strong potential for an environmental forensics application of XANES for chemical fingerprinting of weathered sulphur-containing species and industrial additives in OSPW.
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Affiliation(s)
- J V Headley
- Water Science & Technology Directorate, Environment Canada, Saskatoon, Saskatchewan, Canada.
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Vrbanac JJ, Hilgers A, Dubnicka T, Shilliday FB, Humphries D, Hayes RN. High-resolution isotope-dilution mass spectrometry using metabolism of isotope-labeled compounds: application to drug metabolites. Rapid Commun Mass Spectrom 2012; 26:2569-2576. [PMID: 23059872 DOI: 10.1002/rcm.6376] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
RATIONALE Herein we describe a generic quantitative method using high-resolution, isotope-dilution (HRID) metabolism of isotope-labeled compounds and apply it to the analysis of drug metabolites (DMs) in human plasma. Metabolites (drug) in Safety Testing (MIST) application was one goal. METHODS Testosterone (T) and diclofenac (D) were chosen for mass defect characteristics. T, [(14)C]T, [(13)C(3)]T, D, [(14)C]D, and [(13)C(6)]D were metabolized separately in vitro to produce test metabolites. Liquid chromatography/radioactivity monitoring (LC/RAM) analysis was used to determine the concentration of the test metabolites in the incubates. The incubates containing 6β-hydroxy-T (6βHT), [(13)C(3)]6βHT, 4'-hydroxy-D (4'HD) and [(13)C(6)]4'HD were used to make standard curves. Plasma samples were prepared by 'dilute-and-shoot' and analyzed by LC/MS using SCIEX 5000 and Thermo Orbitrap instrumentation. RESULTS Human hepatic microsomes and the S9 fraction produced between 2-6 μM β-hydroxy-T and 4'-hydroxy-D at 60 min starting with 10 μM parent drug as determined by LC/RAM. It was assumed that the amounts of [(13)C(3)]6βHT and [(13)C(6)]4'HD produced were similar. Dilutions and standard curves were prepared in human plasma. Analysis of the DMs by LC/MS/MS and LC/HRMS exhibited linear responses over a useable range. CONCLUSIONS HRID with metabolism of an isotope-labeled compound reduces the number of analytical variables considerably. Metabolism of the parent drug to DMs represents a simpler alternative quantitative method compared with traditional approaches. The method will have useful applications for evaluating MIST situations.
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Degenhardt D, Humphries D, Cessna AJ, Messing P, Badiou PH, Raina R, Farenhorst A, Pennock DJ. Dissipation of glyphosate and aminomethylphosphonic acid in water and sediment of two Canadian prairie wetlands. J Environ Sci Health B 2012; 47:631-9. [PMID: 22560025 DOI: 10.1080/03601234.2012.668459] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Glyphosate [N-(phosphonomethyl)glycine] is the active ingredient of several herbicide products first registered for use in 1974 under the tradename Roundup. The use of glyphosate-based herbicides has increased dramatically over the last two decades particularly in association with the adoption of glyphosate-tolerant crops. Glyphosate has been detected in a range of surface waters but this is the first study to monitor its fate in prairie wetlands situated in agricultural fields. An ephemeral wetland (E) and a semi-permanent wetland (SP) were each divided into halves using a polyvinyl curtain. One half of each wetland was fortified with glyphosate with the added mass simulating an accidental direct overspray. Glyphosate dissipated rapidly in the water column of the two prairie wetlands studied (DT(50) values of 1.3 and 4.8 d) which may effectively reduce the impact of exposure of aquatic biota to the herbicide. Degradation of glyphosate to its major metabolite aminomethylphosphonic acid (AMPA) and sorption of the herbicide to bottom sediment were more important pathways for the dissipation of glyphosate from the water column than movement of the herbicide with infiltrating water. Presently, we are not aware of any Canadian guidelines for glyphosate residues in sediment of aquatic ecosystems. Since a substantial portion of glyphosate entering prairie wetlands will become associated with bottom sediments, particularly in ephemeral wetlands, guidelines would need to be developed to assess the protection of organisms that spend all or part of their lifecycle in sediment.
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Affiliation(s)
- Dani Degenhardt
- Agriculture and Agri-Food Canada, Saskatoon, Saskatchewan, Canada.
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Waiser MJ, Humphries D, Tumber V, Holm J. Effluent-dominated streams. Part 2: Presence and possible effects of pharmaceuticals and personal care products in Wascana Creek, Saskatchewan, Canada. Environ Toxicol Chem 2011; 30:508-519. [PMID: 21072845 DOI: 10.1002/etc.398] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Recent worldwide surveys have not only established incomplete removal of pharmaceuticals and personal care products (PPCPs) by sewage treatment plants, but also their presence in surface waters receiving treated sewage effluent. Those aquatic systems where sewage effluent dominates flow are thought to be at the highest risk for ecosystem level changes. The city of Regina, Saskatchewan, Canada (population 190,400) treats its sewage at a modern tertiary sewage treatment facility located on Wascana Creek. The Wascana Creek hydrograph is dominated by one major event: spring snow melt. Thereafter, creek flow declines considerably and in winter treated sewage effluent makes up almost 100% of stream flow. Four water surveys conducted on the creek from winter 2005 to spring 2007 indicated that PPCPs were always present, in nanogram and sometimes microgram per liter concentrations downstream of the sewage treatment plant. This mixture included antibiotics, analgesics, antiinflammatories, a lipid regulator, metabolites of caffeine, cocaine and nicotine, and an insect repellent. Not surprisingly, concentrations of some PPCPs were highest in winter. According to hazard quotient calculations and homologue presence, ibuprofen, naproxen, gemfibrozil, triclosan, erythromycin, trimethoprim, and sulfamethoxazole were present in Wascana Creek at concentrations that may present a risk to aquatic organisms. The continual exposure to a mixture of pharmaceuticals as well as concentrations of un-ionized ammonia that far exceed Canadian and American water quality guidelines suggests that Wascana Creek should be considered an ecosystem at risk. Although the Wascana Creek study is regional in nature, the results highlight the considerable risks posed to aquatic organisms in such effluent-dominated ecosystems.
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Affiliation(s)
- Marley J Waiser
- Environment Canada, Water Sciences and Technology Directorate, Saskatoon, Saskatchewan, Canada.
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Humphries D. Sport and exercise medicine - a new specialty. Aust Fam Physician 2010; 39:5. [PMID: 20369124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Sport and exercise medicine (SEM) incorporates a diverse range of disciplines. These include: disease and injury prevention, management of medical problems in exercising individuals, management of soft tissue injuries sustained during exercise, and exercise prescription for improving physical fitness and treating disease.
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Hartwig KA, Humphries D, Matebeni Z. Building capacity for AIDS NGOs in southern Africa: evaluation of a pilot initiative. Health Promot Int 2008; 23:251-9. [DOI: 10.1093/heapro/dan013] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Humphries D. Advances in sport, leisure and ergonomics. Br J Sports Med 2007. [DOI: 10.1136/bjsm.2006.028696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Abstract
The clinical features of 10 cases of lateral trunk muscle injury in first class cricket pace bowlers are described. Typically the injury occurs during a single delivery, is associated with considerable pain, and prevents the bowler from continuing. The clinical picture is typical of a muscular or musculotendinous injury. The most consistent clinical tests were focal tenderness on palpation and pain with resisted side flexion towards the painful side. The magnetic resonance image in 70% of cases was consistent with an injury to the internal oblique, the external oblique, or the transversalis muscles at or near their attachments to one or more of the lowest four ribs. The injury occurs on the non-bowling arm side. Recovery can be prolonged. The injury was a recurrence in six of the 10 cases. The biomechanics of the injury are not yet understood.
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Affiliation(s)
- D Humphries
- St Helens Hospital, 186 Macquarie Street, Hobart, Tasmania 7000, Australia.
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Abstract
PurposeThe purpose of this paper is to inform businesses about the best practice in getting the most out of the government‐funded Knowledge Transfer Partnerships – a method of transferring university expertise to the benefit of business.Design/methodology/approachThe paper describes how these Knowledge Transfer Partnerships work, the kind of projects that get funded, and the benefits that surveyed companies have experienced. It then gives three case studies of Knowledge Transfer Partnerships to illustrate how they work.FindingsKnowledge Transfer Partnerships significantly improve productivity and profitability in most businesses where the projects take place. They also cover a broad range of projects than simply technology transfer.Originality/valueThe paper is valuable to businesses, especially SMEs, who might be looking to undertake projects that involve some innovative or research element as it explains how to obtain significant government funding.
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Humphries D. Sports injuries: recognition and management, 3rd edn. Br J Sports Med 2005. [DOI: 10.1136/bjsm.2003.008805] [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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Humphries D, Ruterbories K, Chan C, Narayanan R. Development and validation of a liquid chromatography-tandem mass spectrometric method for the determination of alpha-methyltyrosine in human plasma. J Chromatogr B Analyt Technol Biomed Life Sci 2004; 810:229-34. [PMID: 15380719 DOI: 10.1016/j.jchromb.2004.08.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2003] [Accepted: 08/02/2004] [Indexed: 04/30/2023]
Abstract
A sensitive and selective LC-MS-MS method for the isolation and quantification of alpha-methyltyrosine (AMT) from human plasma is described. The method employs a simple protein precipitation using zinc sulfate and sodium hydroxide. This precipitation procedure produced samples with high aqueous content that could be directly injected into a LC-MS-MS system without compromising reverse-phase chromatographic performance. Chromatographic separation was performed on a MetaChem MonoChrom C(18) column (2.0 mm x 50 mm; 5 microm) at a flow rate of 1 mL/min. Compounds were eluted using a gradient mixture of water-acetic acid (100:0.1, v/v) and acetonitrile-acetic acid (100:0.1, v/v). The structural analog alpha-hydroxymethyltyrosine was used as the internal standard. Mass spectrometric detection was carried out with a triple quadrupole mass spectrometer. The method was validated and used to determine human plasma AMT concentrations, and has been implemented to derive pharmacokinetic parameters.
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Affiliation(s)
- David Humphries
- Department of Drug Disposition, Eli Lilly and Company, Lilly Corporate Center, Indianapolis, IN 46285, USA.
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Russell K, Skrumeda L, Gisselberg M, Hadford E, Humphries D, Sandler H, Roach M, Kupelian P, Mate T. Biocompatibility of a wireless electromagnetic transponder permanent implant for accurate localization and continuous tracking of tumor targets. Int J Radiat Oncol Biol Phys 2003. [DOI: 10.1016/s0360-3016(03)01326-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Humphries D. Reckoning with risk: learning to live with uncertainty: G Gigerenzer. Allen Lane Penguin Press Penguin Books Ltd, 2002, pound14.99, pp 310. ISBN 0713995122. Br J Sports Med 2003. [DOI: 10.1136/bjsm.37.1.92-b] [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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Affiliation(s)
- D Humphries
- Sports Medicine, St Helens Hospital, Hobart, Australia.
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Mackintosh E, Phipps R, Sutton J, Humphries D, Wilkinson J. Effect of monensin on rumen fermentation
and digestion and milk production
in lactating dairy cows. J Anim Feed Sci 2002. [DOI: 10.22358/jafs/67830/2002] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Elkin C, Kapur H, Smith T, Humphries D, Pollard M, Hammon N, Hawkins T. Magnetic bead purification of labeled DNA fragments for high-throughput capillary electrophoresis sequencing. Biotechniques 2002; 32:1296, 1298-1300, 1302. [PMID: 12074160 DOI: 10.2144/02326st05] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
We have developed an automated purification method for dye-terminator-based DNA sequencing products using a magnetic bead approach. This 384-well protocol generates sequence fragments that are essentially free of template DNA, salt, and excess dye-terminator products. In comparison with traditional ethanol precipitation protocols, this method uses no centrifugation, is rapid, completely automated, and increases the phred-20 read length by an average of 40 bases. To date, we have processed over 4 million samples with 94% averaging 641 phred-20 bases on the MegaBACE 1000 and 4000 and the ABI PRISM 3700 capillary instruments.
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Affiliation(s)
- C Elkin
- Joint Genome Institute/US Department of Energy, Walnut Creek, CA 94598, USA.
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Humphries D. Medial forefoot pain. Aust Fam Physician 2000; 29:821. [PMID: 11008381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
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Frankford DM, Weinberg JK, Bennett T, Dowdall GW, Good MJ, Humphries D, Marsh M, Morgan LM, Solomon M, Weisman CS. Books: review symposium on women's health. Review essay. The past, present, and future of long-term care--a women's issue? J Health Polit Policy Law 2000; 25:565-611. [PMID: 11203338 DOI: 10.1215/03616878-25-3-565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Humphries D. The causes of rhabdomyolysis. Aust Fam Physician 1997; 26:987. [PMID: 9267065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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Abstract
Cerebral blood flow (CBF) was measured with the 133Xenon inhalation technique and forehead skin flow with laser Doppler, before and twice after 0.3 milligram/kilogram of cocaine hydrochloride and a placebo given intravenously to six cocaine abusers, during two visits, separated by a minimum of one week. After cocaine, subjects showed significant increases in intoxication and tension. Systolic blood pressure and pulse rate also increased significantly after the drug but not after the placebo. CBF, with and without correction for end-tidal CO2, showed increases in left and right hemisphere after cocaine. The CBF increase was maximal in frontal, central and parietal regions. CBF changes correlated only with changes in a rated level of intoxication. Forehead skin flow did not change after cocaine or placebo. In habitual cocaine abusers, 0.3 mg/kg of cocaine, given intravenously produced increased CBF and no changes in forehead skin flow.
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Affiliation(s)
- R J Mathew
- Department of Psychiatry, Duke University Medical Center, Durham, North Carolina 27110, USA
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Kumar Y, Humphries D. A rapid method for determination of Aroclor 1260 in cattle adipose tissue. J Environ Sci Health B 1996; 31:1001-1013. [PMID: 8751449 DOI: 10.1080/03601239609373050] [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] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
A simple analytical procedure for the determination of Aroclor 1260 in cattle adipose tissue is described. The polychlorinated biphenyls residues are extracted from the tissue using a soxhlet extractor and the extracts are cleaned up using a florisil SEP-PAK cartridge. The residues are detected using a gas chromatograph equipped with an electron capture detector. The effect of extraction time of the Aroclor 1260 residues from the tissue has been investigated and a period of four hours is found to give satisfactory percent recoveries. Greater than 85 percent recoveries were obtained from adipose tissue spiked with Aroclor 1260. The method can be used to detect Aroclor 1260 residue levels as low as 0.10 parts per million. The method was used to analyze thirty-one cattle adipose tissue samples out of which twenty-six samples were taken from cattle suspected of exposure to a pasture containing electrical transformers and capacitors containing Aroclor 1260. Five control samples were collected from cattle with no known exposure. All twenty-six samples were found to contain non-detectable Aroclor 1260 residues.
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Affiliation(s)
- Y Kumar
- Environmental Chemistry Program, Alberta Environmental Centre, Vegreville, Canada
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Humphries D, Vella AT, Pearce EJ. Increased CD4+ T cell-dependent anti-erythrocyte antibody levels following the onset of parasite egg production in Schistosoma mansoni infected mice. Parasite Immunol 1994; 16:469-77. [PMID: 7838596 DOI: 10.1111/j.1365-3024.1994.tb00375.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Anaemia has been reported to be a symptom of schistosomiasis mansoni. In other chronic infectious diseases, anti-red blood cell (RBC) antibodies have been suggested or shown to play a role in anaemia by participating in either complement or macrophage-dependent RBC elimination. To examine whether such a situation could be contributing to the anaemia of schistosomiasis, we examined RBC taken from infected mice for surface-bound antibodies. Our data show that prior to the onset of egg production infected mice have plasma haemoglobin levels that are indistinguishable from age matched controls (AMC). However, consistent with previous reports, following the initiation of egg laying, infected mice have significantly lower haemoglobin levels than AMC. Surface-bound IgM, IgG1 and IgG3 on RBC from infected mice increased markedly after egg laying began. Levels of RBC-associated IgG2b were similar on RBC from infected and normal mice. Antibody production against RBC was Th cell-dependent since it did not occur in mice depleted of CD4+ cells. Antibodies eluted from RBC of infected mice bound to isolated membranes of RBC from AMC and to a soluble extract of schistosome eggs. Furthermore, antibodies in serum from mice carrying patent infections bound to the membranes of RBC from normal mice. Taken together, these data suggest that schistosome eggs induce an antibody response which may cross react with a RBC surface antigen.
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Affiliation(s)
- D Humphries
- Division of Nutritional Sciences, NYSCVM, Cornell University, Ithaca 14853-6401
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Humphries D. Sport and the general practitioner. Musings of a club doctor. Aust Fam Physician 1994; 23:1083-6. [PMID: 8053840] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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Moore TJ, Barron J, Hutchinson F, Golden C, Ellis C, Humphries D. Prosthetic usage following major lower extremity amputation. Clin Orthop Relat Res 1989:219-24. [PMID: 2910604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
There were 157 patients following major lower extremity amputation who were evaluated to determine functional prosthetic ambulation. Twenty-eight patients were evaluated in the amputee clinic and found not to be candidates for prosthetic fitting. Forty-one patients were fit with a prosthesis but did not become functional prosthetic ambulators. Eighty-eight patients became functional prosthetic ambulators. Of all above-the-knee amputees, 46% became functional prosthetic ambulators. Only 19% of bilateral lower extremity amputees became functional prosthetic ambulators. Of all below-the-knee amputees, 66% became functional ambulators. The presence of coronary artery disease decreased the ambulatory potential in above-the-knee or bilateral amputees but not in below-the-knee amputees. A screening method for elderly, dysvascular amputees should be instituted prior to prosthetic fitting.
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Affiliation(s)
- T J Moore
- Charlotte Rehabilitation Hospital, North Carolina
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Humphries D. Comprehensive examinations: past, present and future. AARN News Lett 1980; 36:9-10. [PMID: 6905634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Dziak R, Chang YW, Humphries D, Lloyd W, Wells H, Schmid K, Nimberg RB. Effects of a bone resorptive factor from human cancer ascites fluid on rat bone cell calcium and cyclic AMP. Calcif Tissue Int 1980; 30:191-7. [PMID: 6249472 DOI: 10.1007/bf02408627] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The effects of a bone resorptive protein isolated from human cancer ascites fluid on bone cell calcium and cyclic AMP were studied with fetal rat cells. The osteoclast-activating factor increased bone cell calcium uptake at 37 degrees C and 4 degrees C with no direct effects on calcium efflux. Concentrations of the resorptive factor that increased in vitro bone resorption and cell calcium uptake had no effect on cyclic AMP. The effects of the protein on calcium uptake were not specific for bone cells, and large increases were also observed in isolated fetal rat skin cells. These studies suggest that increases in the permeability of the cell membrane to calcium are involved in the mechanism of action of the ascites fluid resorptive protein.
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