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Azad F, Hallam A, Morley J, Green AG. Phase transitions in the classical simulability of open quantum systems. Sci Rep 2023; 13:8866. [PMID: 37258551 DOI: 10.1038/s41598-023-35336-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Accepted: 05/16/2023] [Indexed: 06/02/2023] Open
Abstract
We introduce a Langevin unravelling of the density matrix evolution of an open quantum system over matrix product states, which we term the time-dependent variational principle-Langevin equation. This allows the study of entanglement dynamics as a function of both temperature and coupling to the environment. As the strength of coupling to and temperature of the environment is increased, we find a transition where the entanglement of the individual trajectories saturates, permitting a classical simulation of the system for all times. This is the Hamiltonian open system counterpart of the saturation in entanglement found in random circuits with projective or weak measurements. If a system is open, there is a limit to the advantage in simulating its behaviour on a quantum computer, even when that evolution harbours important quantum effects. Moreover, if a quantum simulator is in this phase, it cannot simulate with quantum advantage.
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Affiliation(s)
- F Azad
- London Centre for Nanotechnology, University College London, Gordon St., London, WC1H 0AH, UK
| | - A Hallam
- School of Physics and Astronomy, University of Leeds, Leeds, LS2 9JT, UK
| | - J Morley
- London Centre for Nanotechnology, University College London, Gordon St., London, WC1H 0AH, UK
| | - A G Green
- London Centre for Nanotechnology, University College London, Gordon St., London, WC1H 0AH, UK.
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Morley J, Moayyeri A, Ali L, Taylor A, Feudjo-Tepie M, Hamilton L, Bayly J. Persistence and compliance with osteoporosis therapies among postmenopausal women in the UK Clinical Practice Research Datalink. Osteoporos Int 2020; 31:533-545. [PMID: 31758206 PMCID: PMC7076063 DOI: 10.1007/s00198-019-05228-8] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [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: 02/05/2019] [Accepted: 11/06/2019] [Indexed: 12/16/2022]
Abstract
UNLABELLED Gaining full benefits from osteoporosis medications requires long-term treatment. Investigating the real-world persistence of women receiving osteoporosis medications in the UK, we found that most patients stop treatment within a year. To prevent osteoporotic fragility fractures, long-term treatment persistence must be improved. INTRODUCTION Persistence with osteoporosis therapies has historically been poor. To treat this chronic and progressive disease, it is essential that patients receive the full benefit of these medications. We estimated persistence and compliance with osteoporosis therapies in a large sample of postmenopausal women in the UK. METHODS Data were obtained from the Clinical Practice Research Datalink for all women aged 50 years and over or women with early menopause, who received at least one prescription in primary care for any licensed osteoporosis therapy between January 1, 2010 and December 31, 2015. Persistence and compliance at 24 months (primary objective) and at 5 years (exploratory objective) were estimated in three patient cohorts: "All Patients," "Naïve Patients," and "Drug-Specific." RESULTS The All Patients cohort included 72,256 women. Persistence with any therapy was 56.1%, 43.6%, 36.4%, and 31.0% at 6, 12, 18, and 24 months, respectively, and 23.2% and 13.1% at 3 years and 5 years, respectively. Patients were generally more persistent and compliant if evaluated from their first exposure to osteoporosis therapy (Naïve Patients cohort). In the drug-specific analysis, 64% of patients receiving denosumab (administered subcutaneously every 6 months) were persistent at 24 months compared with 28% and 23% of those taking oral bisphosphonates and intravenous bisphosphonates, respectively. CONCLUSIONS Only about one in three patients who received osteoporosis therapy continued to be on treatment after 2 years. There is a need to improve persistence with osteoporosis therapy, especially for high-risk patients.
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Affiliation(s)
| | | | | | | | | | | | - J Bayly
- University of Derby, Derby, UK
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Affiliation(s)
- M Berg-Weger
- John E. Morley, MB, BCh, Division of Geriatric Medicine, Saint Louis University School of Medicine, 1402 S. Grand Blvd., M238, St. Louis, MO 63104,
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Clayton K, Mciver A, Bougler A, Buckle C, Butler C, Draffen J, Earl S, Jeffs Y, Jones S, Jordan C, Morley J, Neal H, Newbold S, Roberts J, Rose P, Shepherd P, Smith B. P1.07-11 An Evaluation of the Patient’s Experience and Expectations During the Implementation of NHS England, National Optimal Lung Cancer Pathway. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.1020] [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]
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Pahor M, Kritchevsky SB, Waters DL, Villareal DT, Morley J, Hare JM, Vellas B. Designing Drug Trials for Frailty: ICFSR Task Force 2018. J Frailty Aging 2019; 7:150-154. [PMID: 30095144 DOI: 10.14283/jfa.2018.20] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
To reduce disability and dependence in older adults, frailty may represent an appropriate target for intervention. While preventing frailty through lifestyle interventions may be the optimal public health approach for many population groups, pharmacological approaches will likely be needed for individuals who meet frailty criteria or who have comorbid conditions that contribute to and complicate the frailty syndrome, and for those who are not compliant with lifestyle interventions. Barriers to successful development of drug treatments for frailty include variability in how the frailty syndrome is defined, lack of agreement on the best diagnostic tools and outcome measures, and the paucity of sensitive, reliable, and validated biomarkers. The International Conference on Frailty and Sarcopenia Research Task Force met in Miami, Florida, on February 28, 2018, to consider the status of treatments under development for frailty and discuss potential strategies for advancing the field. They concluded that at the present time, there may be a more productive regulatory pathway for adjuvant treatments or trials targeting specific functional outcomes such as gait speed. They also expressed optimism that several studies currently underway may provide the insight needed to advance drug development for frailty.
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Affiliation(s)
- M Pahor
- Marco Pahor, University of Florida Institute on Aging, Gainesville, FL, USA,
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Cederholm T, Jensen G, Correia M, Gonzalez M, Fukushima R, Higashiguchi T, Baptista G, Barazzoni R, Blaauw R, Coats A, Crivelli A, Evans D, Gramlich L, Fuchs‐Tarlovsky V, Keller H, Llido L, Malone A, Mogensen K, Morley J, Muscaritoli M, Nyulasi I, Pirlich M, Pisprasert V, de van der Schueren M, Siltharm S, Singer P, Tappenden K, Velasco N, Waitzberg D, Yamwong P, Yu J, Van Gossum A, Compher C. GLIM criteria for the diagnosis of malnutrition - A consensus report from the global clinical nutrition community. J Cachexia Sarcopenia Muscle 2019; 10:207-217. [PMID: 30920778 PMCID: PMC6438340 DOI: 10.1002/jcsm.12383] [Citation(s) in RCA: 428] [Impact Index Per Article: 85.6] [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: 12/18/2022] Open
Abstract
RATIONALE This initiative is focused on building a global consensus around core diagnostic criteria for malnutrition in adults in clinical settings. METHODS In January 2016, the Global Leadership Initiative on Malnutrition (GLIM) was convened by several of the major global clinical nutrition societies. GLIM appointed a core leadership committee and a supporting working group with representatives bringing additional global diversity and expertise. Empirical consensus was reached through a series of face-to-face meetings, telephone conferences, and e-mail communications. RESULTS A two-step approach for the malnutrition diagnosis was selected, i.e., first screening to identify "at risk" status by the use of any validated screening tool, and second, assessment for diagnosis and grading the severity of malnutrition. The malnutrition criteria for consideration were retrieved from existing approaches for screening and assessment. Potential criteria were subjected to a ballot among the GLIM core and supporting working group members. The top five ranked criteria included three phenotypic criteria (weight loss, low body mass index, and reduced muscle mass) and two etiologic criteria (reduced food intake or assimilation, and inflammation or disease burden). To diagnose malnutrition at least one phenotypic criterion and one etiologic criterion should be present. Phenotypic metrics for grading severity as Stage 1 (moderate) and Stage 2 (severe) malnutrition are proposed. It is recommended that the etiologic criteria be used to guide intervention and anticipated outcomes. The recommended approach supports classification of malnutrition into four etiology-related diagnosis categories. CONCLUSION A consensus scheme for diagnosing malnutrition in adults in clinical settings on a global scale is proposed. Next steps are to secure further collaboration and endorsements from leading nutrition professional societies, to identify overlaps with syndromes like cachexia and sarcopenia, and to promote dissemination, validation studies, and feedback. The diagnostic construct should be re-considered every 3-5 years.
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Affiliation(s)
- T. Cederholm
- Department of Public Health and Caring Sciences, Clinical Nutrition and MetabolismUppsala UniversityUppsalaSweden
- Theme AgingKarolinska University HospitalStockholmSweden
| | - G.L. Jensen
- Dean's Office and Department of Medicine, Larner College of MedicineUniversity of VermontBurlingtonVTUSA
| | - M.I.T.D. Correia
- Department of SurgeryUniversidade Federal de Minas GeraisBelo HorizanteBrazil
| | - M.C. Gonzalez
- Post‐graduate Program in Health and BehaviorCatholic University of PelotasRSBrazil
| | - R. Fukushima
- Department of Medicine, Department of SurgeryTokyo University School of MedicineTokyoJapan
| | - T. Higashiguchi
- Department of Surgery and Palliative MedicineFujita Health University School of MedicineDengakugakubo, KutsukakeToyoake‐CityAichiJapan
| | - G. Baptista
- Medicine Faculty Central University of VenezuelaUniversitary Hospital of Caracas, Chief Nutritional Support Unit Hospital Universitary/Academic of Caracas, University Central of VenezuelaVenezuela
| | - R. Barazzoni
- Department of Medical, Technological and Translational SciencesUniversity of Trieste, Ospedale di CattinaraTriesteItaly
| | - R. Blaauw
- Division of Human Nutrition, Faculty of Medicine and Health SciencesStellenbosch UniversityCape TownSouth Africa
| | - A.J.S. Coats
- Monash UniversityAustralia
- University of WarwickWarwickUK
| | - A.N. Crivelli
- Unit of Nutrition Support and Malabsorptive DiseasesHospital HIGA San MartínBuenos AiresArgentina
| | - D.C. Evans
- Department of SurgeryThe Ohio State UniversityColumbusOHUSA
| | | | - V. Fuchs‐Tarlovsky
- Clinical Nutrition DepartmentHospital General de MéxicoMexico CityMexico
| | - H. Keller
- Schlegel‐UW Research Institute for Aging and Department of KinesiologyUniversity of WaterlooOntarioCanada
| | - L. Llido
- Clinical Nutrition ServiceSt. Luke's Medical Center‐Quezon CityMetro‐Manila, Quezon CityPhilippines
| | - A. Malone
- The American Society for Parenteral and Enteral NutritionSilver SpringMDUSA
- Mt. Carmel West HospitalColumbusOHUSA
| | - K.M. Mogensen
- Department of NutritionBrigham and Women's HospitalBostonMAUSA
| | - J.E. Morley
- Division of GeriatricsSaint Louis University HospitalSt. LouisMOUSA
| | - M. Muscaritoli
- Department of Clinical MedicineSapienza University of RomeItaly
| | - I. Nyulasi
- Department of Nutrition, Alfred Health and Professor of Dietetic Practice, Department of Rehabilitation, Nutrition and Sport, Latrobe University; Department of Medicine, Central Clinical SchoolMonash UniversityAustralia
| | - M. Pirlich
- Imperial Oak Outpatient Clinic, Endocrinology, Gastroenterology and Clinical NutritionBerlinGermany
| | - V. Pisprasert
- Department of MedicineKhon Kaen University College of MedicineKhon KaenThailand
| | - M.A.E. de van der Schueren
- Department of Nutrition and DieteticsAmsterdam UMC, Vrije Universiteit AmsterdamAmsterdamthe Netherlands
- Faculty of Health and Social Studies, Department of Nutrition and DieteticsHAN University of Applied SciencesNijmegenthe Netherlands
| | - S. Siltharm
- Ministry of Science and TechnologyBangkokThailand
| | - P. Singer
- Department of General Intensive CareRabin Medical CenterPetah TikvaIsrael
- Sackler School of MedicineTel Aviv UniversityIsrael
| | - K. Tappenden
- Department of Kinesiology and NutritionUniversity of Illinois‐ChicagoChicagoILUSA
| | - N. Velasco
- Department of Nutrition, Diabetes and Metabolismo, School of MedicinePontificia Universidad Catolica de ChileChile
| | - D. Waitzberg
- Department of Gastroenterology, School of MedicineUniversity of São PauloSão PauloBrazil
| | - P. Yamwong
- Department of MedicineSiriaj HospitalBangkokThailand
| | - J. Yu
- GI Surgery and Nutrition Metabolic Division, Department of General SurgeryPeking Union Medical College HospitalBeijingChina
| | - A. Van Gossum
- Department of Gastroenterology, Clinic of Intestinal Diseases and Nutritional SupportHopital Erasme, Free University of BrusselsBrusselsBelgium
| | - C. Compher
- Biobehavioral Health Sciences Department and Nutrition ProgramsUniversity of Pennsylvania School of NursingPhiladelphiaPAUSA
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Morley J, Anderson V, Beattie V, Clayton K, Denby D, Eaton M, Glover S, Griffiths A, Maddock N, Mcadam J, Morgan S, Perkins T, Phillips S, Pugh B, Rees P, Roberts J, Robinson W, Rose P. P3.07-05 Can Improving Working Partnerships with Primary Care Prevent Avoidable Emergency Admissions for Patients with Lung Cancer? J Thorac Oncol 2018. [DOI: 10.1016/j.jtho.2018.08.1741] [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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Cederholm T, Jensen GL, Correia MITD, Gonzalez MC, Fukushima R, Higashiguchi T, Baptista G, Barazzoni R, Blaauw R, Coats A, Crivelli A, Evans DC, Gramlich L, Fuchs-Tarlovsky V, Keller H, Llido L, Malone A, Mogensen KM, Morley JE, Muscaritoli M, Nyulasi I, Pirlich M, Pisprasert V, de van der Schueren MAE, Siltharm S, Singer P, Tappenden K, Velasco N, Waitzberg D, Yamwong P, Yu J, Van Gossum A, Compher C, Cederholm T, Van Gossum A, Correia MIT, Gonzalez MC, Fukushima R, Higashiguchi T, Baptista G, Barazzoni R, Blaauw R, Coats A, Crivelli A, Evans D, Gramlich L, Fuchs V, Keller H, Llido L, Malone A, Mogensen K, Morley J, Muscaritoli M, Nyulasi I, Pirlich M, Pisprasert V, de van der Schueren M, Siltharm S, Singer P, Tappenden K, Velasco N, Waitzberg D, Yamwong P, Yu J. GLIM criteria for the diagnosis of malnutrition - A consensus report from the global clinical nutrition community. Clin Nutr 2018; 38:1-9. [PMID: 30181091 DOI: 10.1016/j.clnu.2018.08.002] [Citation(s) in RCA: 1191] [Impact Index Per Article: 198.5] [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: 07/31/2018] [Accepted: 08/02/2018] [Indexed: 12/12/2022]
Abstract
RATIONALE This initiative is focused on building a global consensus around core diagnostic criteria for malnutrition in adults in clinical settings. METHODS In January 2016, the Global Leadership Initiative on Malnutrition (GLIM) was convened by several of the major global clinical nutrition societies. GLIM appointed a core leadership committee and a supporting working group with representatives bringing additional global diversity and expertise. Empirical consensus was reached through a series of face-to-face meetings, telephone conferences, and e-mail communications. RESULTS A two-step approach for the malnutrition diagnosis was selected, i.e., first screening to identify "at risk" status by the use of any validated screening tool, and second, assessment for diagnosis and grading the severity of malnutrition. The malnutrition criteria for consideration were retrieved from existing approaches for screening and assessment. Potential criteria were subjected to a ballot among the GLIM core and supporting working group members. The top five ranked criteria included three phenotypic criteria (non-volitional weight loss, low body mass index, and reduced muscle mass) and two etiologic criteria (reduced food intake or assimilation, and inflammation or disease burden). To diagnose malnutrition at least one phenotypic criterion and one etiologic criterion should be present. Phenotypic metrics for grading severity as Stage 1 (moderate) and Stage 2 (severe) malnutrition are proposed. It is recommended that the etiologic criteria be used to guide intervention and anticipated outcomes. The recommended approach supports classification of malnutrition into four etiology-related diagnosis categories. CONCLUSION A consensus scheme for diagnosing malnutrition in adults in clinical settings on a global scale is proposed. Next steps are to secure further collaboration and endorsements from leading nutrition professional societies, to identify overlaps with syndromes like cachexia and sarcopenia, and to promote dissemination, validation studies, and feedback. The diagnostic construct should be re-considered every 3-5 years.
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Affiliation(s)
- T Cederholm
- Department of Public Health and Caring Sciences, Clinical Nutrition and Metabolism, Uppsala University, Uppsala, Sweden; Theme Aging, Karolinska University Hospital, Stockholm, Sweden.
| | - G L Jensen
- Dean's Office and Department of Medicine, Larner College of Medicine, University of Vermont, Burlington, VT, USA
| | - M I T D Correia
- Department of Surgery, Universidade Federal de Minas Gerais, Belo Horizante, Brazil
| | - M C Gonzalez
- Post-graduate Program in Health and Behavior, Catholic University of Pelotas, RS, Brazil
| | - R Fukushima
- Department of Medicine, Department of Surgery, Tokyo University School of Medicine, Tokyo, Japan
| | - T Higashiguchi
- Department of Surgery and Palliative Medicine, Fujita Health University School of Medicine, Dengakugakubo, Kutsukake, Toyoake-City, Aichi, Japan
| | - G Baptista
- Medicine Faculty Central University of Venezuela, Universitary Hospital of Caracas, Chief Nutritional Support Unit Hospital Universitary/Academic of Caracas, University Central of Venezuela, Venezuela
| | - R Barazzoni
- Department of Medical, Technological and Translational Sciences, University of Trieste, Ospedale di Cattinara, Trieste, Italy
| | - R Blaauw
- Division of Human Nutrition, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town, South Africa
| | - A Coats
- Monash University, Australia; University of Warwick, Warwick, UK
| | - A Crivelli
- Hospital HIGA San Martín, Unit of Nutrition Support and Malabsorptive Diseases, Buenos Aires, Argentina
| | - D C Evans
- Department of Surgery, The Ohio State University, Columbus, OH, USA
| | - L Gramlich
- University of Alberta, Edmonton, Alberta, Canada
| | - V Fuchs-Tarlovsky
- Clinical Nutrition Department, Hospital General de México, Mexico City, Mexico
| | - H Keller
- Schlegel-UW Research Institute for Aging and Department of Kinesiology, University of Waterloo, Ontario, Canada
| | - L Llido
- Clinical Nutrition Service, St. Luke's Medical Center-Quezon City, Metro-Manila, Quezon City, Philippines
| | - A Malone
- The American Society for Parenteral and Enteral Nutrition, Silver Spring, MD, USA; Mt. Carmel West Hospital, Columbus, OH, USA
| | - K M Mogensen
- Department of Nutrition, Brigham and Women's Hospital, Boston, MA, USA
| | - J E Morley
- Division of Geriatrics, Saint Louis University Hospital, St. Louis, MO, USA
| | - M Muscaritoli
- Department of Clinical Medicine, Sapienza University of Rome, Italy
| | - I Nyulasi
- Department of Nutrition, Alfred Health and Professor of Dietetic Practice, Department of Rehabilitation, Nutrition and Sport, Latrobe University; Department of Medicine, Central Clinical School, Monash University, Australia
| | - M Pirlich
- Imperial Oak Outpatient Clinic, Endocrinology, Gastroenterology and Clinical Nutrition, Berlin, Germany
| | - V Pisprasert
- Department of Medicine, Khon Kaen University College of Medicine, Khon Kaen, Thailand
| | - M A E de van der Schueren
- Amsterdam UMC, Vrije Universiteit Amsterdam, Department of Nutrition and Dietetics, Amsterdam, the Netherlands; HAN University of Applied Sciences, Faculty of Health and Social Studies, Department of Nutrition and Dietetics, Nijmegen, the Netherlands
| | - S Siltharm
- Ministry of Science and Technology, Bangkok, Thailand
| | - P Singer
- Department of General Intensive Care, Rabin Medical Center, Petah Tikva, Israel; Sackler School of Medicine, Tel Aviv University, Israel
| | - K Tappenden
- Department of Kinesiology and Nutrition, University of Illinois-Chicago, Chicago, IL, USA
| | - N Velasco
- Department of Nutrition, Diabetes and Metabolismo, School of Medicine, Pontificia Universidad Catolica de Chile, Chile
| | - D Waitzberg
- Department of Gastroenterology, School of Medicine, University of São Paulo, São Paulo, Brazil
| | - P Yamwong
- Department of Medicine, Siriaj Hospital, Bangkok, Thailand
| | - J Yu
- GI Surgery and Nutrition Metabolic Division, Department of General Surgery, Peking Union Medical College Hospital, Beijing, China
| | - A Van Gossum
- Department of Gastroenterology, Clinic of Intestinal Diseases and Nutritional Support, Hopital Erasme, Free University of Brussels, Brussels, Belgium
| | - C Compher
- Biobehavioral Health Sciences Department and Nutrition Programs, University of Pennsylvania School of Nursing, Philadelphia, PA, USA
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Abstract
SummaryIn vivo platelet aggregation has been studied using a novel, minimally invasive technique. No aggregatory effects of heparin were observed on normal circulating platelets nor was there enhancement of aggregation of platelets during activation by fhtravenous injection of ADP, collagen, PAF acether or thrombin. On the contrary, high doses of heparin were found to inhibit platelet accumulation induced by ADP, collagen or PAF-acether. Inhibition of these responses necessitated doses of heparin in excess of those required for anti-coagulant effects. The present experiments do not establish a mechanism for such inhibition. Extension to other species, including man, is needed before attributing clinical relevance to the present observations.
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Affiliation(s)
- P A Barrett
- The Research Centre, Ciba-Geigy Pharmaceuticals Division, Horsham, West Sussex, U.K
| | - K D Butler
- The Research Centre, Ciba-Geigy Pharmaceuticals Division, Horsham, West Sussex, U.K
| | - J Morley
- The Department of Clinical Pharmacology, Cardiothoracic Institute, Brompton Hospital, London, U.K
| | - C P Page
- The Department of Clinical Pharmacology, Cardiothoracic Institute, Brompton Hospital, London, U.K
| | - W Paul
- The Department of Clinical Pharmacology, Cardiothoracic Institute, Brompton Hospital, London, U.K
| | - A M White
- The Research Centre, Ciba-Geigy Pharmaceuticals Division, Horsham, West Sussex, U.K
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Abstract
SummaryA simple minimally invasive technique has been developed for the continuous monitoring of 111-Indium labelled homologous platelets in the thoracic (C1) and abdominal (C2) regions of experimental animals. The effects of the aggregatory agents adenosine diphosphate (ADP), collagen and platelet activating factor (PAF) and the anti-aggregatory agent, prostacyclin (PGI2) have been studied in the guinea-pig. Administration of ADP, collagen or PAF produces an increase in counts in C1, a decrease in counts in C2, and hence an increase in the ratio C1/C2. The rise in C1/C2 is more protracted after collagen administration than after ADP or PAF. PGI2 (50-500 ng/kg) reduces the response to ADP. The present technique is both simple, reproducible and although the present experiments are in the presence of heparin, the technique remains functional in the presence of minimal heparin, thus making it a suitable method for studies of platelet function and the evaluation of anti-aggregatory agents in vivo.
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Affiliation(s)
- C P Page
- The Department of Clinical Pharmacology (Asthma Research Council), Cardiothoracic Institute, London, U.K
| | - W Paul
- The Department of Clinical Pharmacology (Asthma Research Council), Cardiothoracic Institute, London, U.K
| | - J Morley
- The Department of Clinical Pharmacology (Asthma Research Council), Cardiothoracic Institute, London, U.K
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Vellas B, Fielding RA, Bens C, Bernabei R, Cawthon PM, Cederholm T, Cruz-Jentoft AJ, Del Signore S, Donahue S, Morley J, Pahor M, Reginster JY, Rodriguez Mañas L, Rolland Y, Roubenoff R, Sinclair A, Cesari M. Implications of ICD-10 for Sarcopenia Clinical Practice and Clinical Trials: Report by the International Conference on Frailty and Sarcopenia Research Task Force. J Frailty Aging 2018; 7:2-9. [PMID: 29412436 DOI: 10.14283/jfa.2017.30] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Establishment of an ICD-10-CM code for sarcopenia in 2016 was an important step towards reaching international consensus on the need for a nosological framework of age-related skeletal muscle decline. The International Conference on Frailty and Sarcopenia Research Task Force met in April 2017 to discuss the meaning, significance, and barriers to the implementation of the new code as well as strategies to accelerate development of new therapies. Analyses by the Sarcopenia Definitions and Outcomes Consortium are underway to develop quantitative definitions of sarcopenia. A consensus conference is planned to evaluate this analysis. The Task Force also discussed lessons learned from sarcopenia trials that could be applied to future trials, as well as lessons from the osteoporosis field, a clinical condition with many constructs similar to sarcopenia and for which ad hoc treatments have been developed and approved by regulatory agencies.
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Affiliation(s)
- B Vellas
- Bruno Vellas, MD. Gérontopôle, CHU Toulouse, Service de Médecine Interne et Gérontologie, Clinique, 170 Avenue de Casselardit, 31059 Toulouse, France. Phone: +33 (0) 5 6177-6425; Fax: +33 (0) 6177-6475.
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Vellas B, Fielding RA, Bens C, Bernabei R, Cawthon PM, Cederholm T, Cruz-Jentoft AJ, Del Signore S, Donahue S, Morley J, Pahor M, Reginster JY, Rodriguez Mañas L, Rolland Y, Roubenoff R, Sinclair A, Cesari M. Implications of ICD-10 for Sarcopenia Clinical Practice and Clinical Trials: Report by the International Conference on Frailty and Sarcopenia Research Task Force. J Frailty Aging 2018. [PMID: 29412436 DOI: 10.14283/jfa.2017.30.] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Establishment of an ICD-10-CM code for sarcopenia in 2016 was an important step towards reaching international consensus on the need for a nosological framework of age-related skeletal muscle decline. The International Conference on Frailty and Sarcopenia Research Task Force met in April 2017 to discuss the meaning, significance, and barriers to the implementation of the new code as well as strategies to accelerate development of new therapies. Analyses by the Sarcopenia Definitions and Outcomes Consortium are underway to develop quantitative definitions of sarcopenia. A consensus conference is planned to evaluate this analysis. The Task Force also discussed lessons learned from sarcopenia trials that could be applied to future trials, as well as lessons from the osteoporosis field, a clinical condition with many constructs similar to sarcopenia and for which ad hoc treatments have been developed and approved by regulatory agencies.
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Affiliation(s)
- B Vellas
- Bruno Vellas, MD. Gérontopôle, CHU Toulouse, Service de Médecine Interne et Gérontologie, Clinique, 170 Avenue de Casselardit, 31059 Toulouse, France. Phone: +33 (0) 5 6177-6425; Fax: +33 (0) 6177-6475.
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Adlakha S, Gill M, Morley J. Endobronchial ultrasound-guided (EBUS) transbronchial needle aspiration (TBNA): patient satisfaction under local anaesthesia and quality of sample obtained. Lung Cancer 2018. [DOI: 10.1016/s0169-5002(18)30078-3] [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: 10/18/2022]
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Eaton M, Clayton K, Phillips S, Perkins T, Griffiths A, Denby D, Roberts J, Maddock N, Pugh B, Rees P, Glover S, McAdam J, Rose P, Anderson V, Robinson W, Morgan S, Beattie V, Morley J. Can improving working partnerships with primary care prevent avoidable emergency admissions for patients with lung cancer? Lung Cancer 2018. [DOI: 10.1016/s0169-5002(18)30136-3] [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: 10/18/2022]
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Theou O, Sluggett J, Bell J, Tan E, Emery T, Morley J, Rockwood K, Visvanathan R. FRAILTY IN AUSTRALIAN RESIDENTIAL AGED CARE FACILITIES: RELATIONSHIP WITH ONE-YEAR OUTCOMES. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.5135] [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: 11/13/2022] Open
Affiliation(s)
- O. Theou
- Dalhousie University, Halifax, Nova Scotia, Canada,
| | - J. Sluggett
- Monash University, Melbourne, Victoria, Australia,
| | - J. Bell
- Monash University, Melbourne, Victoria, Australia,
| | - E.C. Tan
- Monash University, Melbourne, Victoria, Australia,
| | - T. Emery
- Resthaven Incorporated, Adelaide, South Australia, Australia,
| | - J.E. Morley
- Saint Louis University, Saint Louis, Missouri
| | - K. Rockwood
- Dalhousie University, Halifax, Nova Scotia, Canada,
| | - R. Visvanathan
- University of Adelaide, Adelaide, South Australia, Australia,
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McAdams De Marco M, Morley J. AN INTERNATIONAL PERSPECTIVE ON IMPLEMENTING FRAILTY INTO CLINICAL PRACTICE. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.4831] [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: 11/13/2022] Open
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Morley J, Arai H, Vellas B. ENHANCING RECOGNITION OF GERIATRIC SYNDROMES BY PRIMARY CARE HEALTH PROFESSIONALS. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.000] [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: 11/13/2022] Open
Affiliation(s)
| | - H. Arai
- National Center for Geriatrics and Gerontology, Nagoya, Japan
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Shepherd P, Draffan J, Beattie V, McNaught H, Kefyalew S, Hill M, Clayton K, Morley J, Bolton S, Denby D, Jeffs Y, McPhelim J, Blake J, Rees P, Roberts J. 91: Can the early intervention of the Lung Cancer CNS reduce the length of stay for patients admitted via the emergency route on first presentation? Lung Cancer 2017. [DOI: 10.1016/s0169-5002(17)30141-1] [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: 10/20/2022]
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Vinson D, Morley J, Huang J, Liu V, Anderson M, Drenten CE, Radecki R, Nishijima D, Reed M. The Accuracy of an Electronic Pulmonary Embolism Severity Index Auto-Populated from the Electronic Health Record: Setting the stage for computerized clinical decision support. Appl Clin Inform 2015; 6:318-33. [PMID: 26171078 PMCID: PMC4493333 DOI: 10.4338/aci-2014-12-ra-0116] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2014] [Accepted: 03/27/2015] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND The Pulmonary Embolism (PE) Severity Index identifies emergency department (ED) patients with acute PE that can be safely managed without hospitalization. However, the Index comprises 11 weighted variables, complexity that can impede its integration into contextual workflow. OBJECTIVE We designed a computerized version of the PE Severity Index (e-Index) to automatically extract the required variables from discrete fields in the electronic health record (EHR). We tested the e-Index on the study population to determine its accuracy compared with a gold standard generated by physician abstraction of the EHR on manual chart review. METHODS This retrospective cohort study included adults with objectively-confirmed acute PE in four community EDs from 2010-2012. Outcomes included performance characteristics of the e-Index for individual values, the number of cases requiring physician editing, and the accuracy of the e-Index risk category (low vs. higher). RESULTS For the 593 eligible patients, there were 6,523 values automatically extracted. Fifty one of these needed physician editing, yielding an accuracy at the value-level of 99.2% (95% confidence interval [CI], 99.0%-99.4%). Sensitivity was 96.9% (95% CI, 96.0%-97.9%) and specificity was 99.8% (95% CI, 99.7%-99.9%). The 51 corrected values were distributed among 47 cases: 43 cases required the correction of one variable and four cases required the correction of two. At the risk-category level, the e-Index had an accuracy of 96.8% (95% CI, 95.0%-98.0%), under-classifying 16 higher-risk cases (2.7%) and over-classifying 3 low-risk cases (0.5%). CONCLUSION Our automated extraction of variables from the EHR for the e-Index demonstrates substantial accuracy, requiring a minimum of physician editing. This should increase user acceptability and implementation success of a computerized clinical decision support system built around the e-Index, and may serve as a model to automate other complex risk stratification instruments.
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Affiliation(s)
- D.R. Vinson
- The Permanente Medical Group, Oakland, California
- Department of Emergency Medicine, Kaiser Permanente Roseville Medical Center, Roseville, California
- Kaiser Permanente Division of Research, Oakland, California
| | - J.E. Morley
- Department of Emergency Medicine, University of California Davis School of Medicine, Sacramento, California
| | - J. Huang
- Kaiser Permanente Division of Research, Oakland, California
| | - V. Liu
- The Permanente Medical Group, Oakland, California
- Kaiser Permanente Division of Research, Oakland, California
- Department of Pulmonary and Critical Care Medicine, Kaiser Permanente Santa Clara Medical Center, Santa Clara, California
| | - M.L. Anderson
- The Permanente Medical Group, Oakland, California
- Department of Emergency Medicine, Kaiser Permanente Roseville Medical Center, Roseville, California
| | - C. E. Drenten
- Department of Emergency Medicine, Sutter General Medical Center, Sacramento, California
| | - R.P. Radecki
- Department of Emergency Medicine, The University of Texas Medical School, Houston, Texas
| | - D.K. Nishijima
- Department of Emergency Medicine, University of California Davis School of Medicine, Sacramento, California
| | - M.E. Reed
- Kaiser Permanente Division of Research, Oakland, California
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Woo J, Leung J, Morley J. Defining Sarcopenia in Terms of Incident Adverse Outcomes. J Am Med Dir Assoc 2015; 16:247-52. [DOI: 10.1016/j.jamda.2014.11.013] [Citation(s) in RCA: 158] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2014] [Revised: 11/19/2014] [Accepted: 11/19/2014] [Indexed: 01/08/2023]
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Elrod L, Linton CL, Morley J, Golich TG, Gay C. Determination of 8[(3S)-3-amino-1-pyrrolidinyl]-1-cyclopropyl-7-fluoro-9-methyl-4-oxo-4H-quinolizine-3-carboxylic acid hydrochloride and related substances by high performance liquid chromatography. Chromatographia 2014. [DOI: 10.1007/bf02688015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Agbetile J, Bourne M, Fairs A, Hargadon B, Desai D, Broad C, Morley J, Bradding P, Brightling C, Green R, Haldar P, Pashley C, Pavord I, Wardlaw A. S90 Effectiveness of Voriconazole In the Treatment of Aspergillus fumigatus Associated Asthma. Thorax 2013. [DOI: 10.1136/thoraxjnl-2013-204457.97] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Vellas B, Pahor M, Manini T, Rooks D, Guralnik JM, Morley J, Studenski S, Evans W, Asbrand C, Fariello R, Pereira S, Rolland Y, Abellan van Kan G, Cesari M, Chumlea WC, Fielding R. Designing pharmaceutical trials for sarcopenia in frail older adults: EU/US Task Force recommendations. J Nutr Health Aging 2013; 17:612-8. [PMID: 23933872 PMCID: PMC4077187 DOI: 10.1007/s12603-013-0362-7] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [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] [Indexed: 12/22/2022]
Abstract
An international task force of academic and industry leaders in sarcopenia research met on December 5, 2012 in Orlando, Florida to develop guidelines for designing and executing randomized clinical trials of sarcopenia treatments. The Task Force reviewed results from previous trials in related disease areas to extract lessons relevant to future sarcopenia trials, including practical issues regarding the design and conduct of trials in elderly populations, the definition of appropriate target populations, and the selection of screening tools, outcome measures, and biomarkers. They discussed regulatory issues, the challenges posed by trials of different types of interventions, and the need for standardization and harmonization. The Task Force concluded with recommendations for advancing the field toward better clinical trials.
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Affiliation(s)
- B Vellas
- University of Toulouse III, Toulouse, France
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Rolland Y, de Souto Barreto P, Abellan Van Kan G, Annweiler C, Beauchet O, Bischoff-Ferrari H, Berrut G, Blain H, Bonnefoy M, Cesari M, Duque G, Ferry M, Guerin O, Hanon O, Lesourd B, Morley J, Raynaud-Simon A, Ruault G, Souberbielle JC, Vellas B. Vitamin D supplementation in older adults: searching for specific guidelines in nursing homes. J Nutr Health Aging 2013; 17:402-12. [PMID: 23538667 DOI: 10.1007/s12603-013-0007-x] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [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: 02/06/2023]
Abstract
BACKGROUND The prevalence of vitamin D insufficiency is very high in the nursing home (NH) population. Paradoxically, vitamin D insufficiency is rarely treated despite of strong clinical evidence and recommendations for supplementation. This review aims at reporting the current knowledge of vitamin D supplementation in NH and proposing recommendations adapted to the specificities of this institutional setting. DESIGN Current literature on vitamin D supplementation for NH residents was narratively presented and discussed by the French Group of Geriatrics and Nutrition. RESULT Vitamin D supplementation is a safe and well-tolerated treatment. Most residents in NH have vitamin D insufficiency, and would benefit from vitamin D supplement. However, only few residents are actually treated. Current specific and personalized protocols for vitamin D supplementation may not be practical for use in NH settings (e.g., assessment of serum vitamin D concentrations before and after supplementation). Therefore, our group proposes a model of intervention based on the systematic supplementation of vitamin D (1,000 IU/day) since the patient's admission to the NH and throughout his/her stay without the need of a preliminary evaluation of the baseline levels. Calcium should be prescribed only in case of poor dietary calcium intake. CONCLUSION A population-based rather than individual-based approach may probably improve the management of vitamin D insufficiency in the older population living in NH, without increasing the risks of adverse health problems. The clinical relevance and cost effectiveness of this proposal should be assessed under NH real-world conditions to establish its feasibility.
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Affiliation(s)
- Y Rolland
- Department of Geriatric Medicine, CHU Toulouse, Institute of aging, F-31059 Toulouse, France.
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Rolland Y, Aquino JP, Andrieu S, Beard J, Benetos A, Berrut G, Coll-Planas L, Dartigues JF, Dong B, Forette F, Franco A, Franzoni S, Hornez T, Metais P, Ruault G, Stephan E, Swagerty D, Tolson D, Volicer L, Vellas B, Morley J. Identification of the main domains for quality of care and clinical research in nursing homes. J Nutr Health Aging 2011; 15:410-24. [PMID: 21528170 DOI: 10.1007/s12603-011-0091-8] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Y Rolland
- Department of Geriatric Medicine, Toulouse University Hospital, Toulouse, France
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Morley J. A Post-Graduate Lecture ON CLINICAL MANIFESTATIONS OF THE MOBILE PROXIMAL COLON: Delivered at Ancoats Hospital, Manchester. Br Med J 2011; 2:542-4. [PMID: 20770018 DOI: 10.1136/bmj.2.3119.542] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Morley J, Smith FB. A CASE OF ACUTE GANGRENOUS CHOLECYSTITIS WITH SPREADING PERITONITIS: OCCURRING IN THE EPIDEMIC OF JAUNDICE, GALLIPOLI, 1915. Br Med J 2011; 1:444-7. [PMID: 20768062 DOI: 10.1136/bmj.1.2882.444] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Morley J. TRAUMATIC INTRAMUSCULAR OSSIFICATION: ITS PATHOLOGY AND TREATMENT BY EXCISION AND AUTOGENOUS GRAFTING OF FASCIA: A Clinical and Experimental Study. Br Med J 2011; 2:1475-7. [PMID: 20766897 DOI: 10.1136/bmj.2.2762.1475] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Agbetile J, Fairs A, Bourne M, Hargadon B, Mutalithas K, Monteiro W, Edwards R, Morley J, Desai D, Brightling CE, Bradding PH, Green RH, Pavord ID, Wardlaw AJ, Pashley CH. S136 Fungal sputum culture in patients with severe asthma is associated with a reduced post bronchodilator FEV1. Thorax 2010. [DOI: 10.1136/thx.2010.150946.37] [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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Morley J, Cohen A, Silveira-Moriyama L, Williams D, Katzenschlager R, Moberg P, Adelman J, Hower R, Rick J, Lees A, Hawkes C, Weintraub D, Doty R, Duda J. P2.026 Optimizing olfactory testing for the diagnosis of Parkinson's disease. Parkinsonism Relat Disord 2009. [DOI: 10.1016/s1353-8020(09)70377-3] [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: 11/30/2022]
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Abstract
1. In the rabbit, in contrast to the cat and dog, the vasodilatation and the secretion in the submaxillary gland which accompany parasympathetic nerve stimulation are correspondingly sensitive to atropine block. 2. It is concluded that true vasodilator nerve fibres to the submaxillary gland exist in the chorda tympani nerve of the rabbit. 3. The vasodilatation which follows sympathetic vasoconstriction in the submaxillary gland of the rabbit is small and variable. The possibility that this after-dilatation is due to an adrenergic neurotransmitter agent acting on beta-vascular receptors is discussed.
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Affiliation(s)
- J Morley
- Department of Physiology, University College London, London, W.C.1
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Bauer J, Morley J, Spanton S, Leusen FJJ, Henry R, Hollis S, Heitmann W, Mannino A, Quick J, Dziki W. Identification, Preparation, and Characterization of Several Polymorphs and Solvates of Terazosin Hydrochloride. J Pharm Sci 2006; 95:917-28. [PMID: 16493591 DOI: 10.1002/jps.20425] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The phenomenon of polymorphism is prevalent in pharmaceuticals, yet it is unusual to identify more than three or four forms for any particular drug. Terazosin hydrochloride has been found to exist at room temperature in four solvent-free forms that can be isolated directly, one solvent-free form that can be prepared by desolvation of a methanolate, a methanol solvate, and a dihydrate. This study presents characterization and methods for preparation of each of these forms. Data are also presented demonstrating the relative stability of these forms.
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Affiliation(s)
- J Bauer
- Abbott Laboratories, North Chicago, Illinois 60064-6293, USA.
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Nieschlag E, Swerdloff R, Behre H, Gooren L, Kaufman J, Legros J, Lunenfeld B, Morley J, Schulman C, Wang C, Weidner W, Wu F. Investigation, Treatment and Monitoring of Late-Onset Hypogonadism in Males. ISA, ISSAM, and EAU Recommendations. J Urol 2006. [DOI: 10.1016/s0022-5347(05)00575-6] [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: 11/15/2022]
Affiliation(s)
- E. Nieschlag
- Institute of Reproductive Medicine, University of Munster, Munster, Germany
| | - R. Swerdloff
- Institute of Reproductive Medicine, University of Munster, Munster, Germany
| | - H.M. Behre
- Institute of Reproductive Medicine, University of Munster, Munster, Germany
| | - L.J. Gooren
- Institute of Reproductive Medicine, University of Munster, Munster, Germany
| | - J.M. Kaufman
- Institute of Reproductive Medicine, University of Munster, Munster, Germany
| | - J.J. Legros
- Institute of Reproductive Medicine, University of Munster, Munster, Germany
| | - B. Lunenfeld
- Institute of Reproductive Medicine, University of Munster, Munster, Germany
| | - J.E. Morley
- Institute of Reproductive Medicine, University of Munster, Munster, Germany
| | - C. Schulman
- Institute of Reproductive Medicine, University of Munster, Munster, Germany
| | - C. Wang
- Institute of Reproductive Medicine, University of Munster, Munster, Germany
| | - W. Weidner
- Institute of Reproductive Medicine, University of Munster, Munster, Germany
| | - F.C. Wu
- Institute of Reproductive Medicine, University of Munster, Munster, Germany
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Abstract
Beta2 agonists are the most commonly used treatment for acute bronchoconstriction. However, during regular use there is a progressive decline of protective efficacy of bronchodilators. This progressive decline has long been considered anomalous because with short-acting beta agonists, there is no corresponding change in bronchodilator efficacy. Airway hyper-responsiveness is itself a feature of asthma and there maybe however, there may be an increase in airway hyper-responsiveness following regular use of beta2 agonist. Airway hyperresponsiveness could diminish the capacity of beta agonists to protect from or result in paradoxical bronchospasm and there effects of racemic salbutamol. There have been reports of increased morbidity and mortality associated with excessive use of beta(2) agonists. As all beta agonists used clinically are racemates composed of 1:1 mixtures of R and S isomers, conducted on the possible involvement of the isomers in hyper-responsiveness. Hyper-responsiveness cannot be attributed to the R isomer, whose capacity to activate beta adrenoceptors will nullify this effect. In contrast, extensive evidence indicated that the S isomer might cause hyper-responsiveness and potential airway inflammation. Further, the S isomer shows a propensity to activate human eosinophils and alter muscarinic M(2) receptor functions. The S isomer, which makes no contribution to therapeutic efficacy and may exacerbate asthma, might therefore be excluded from asthma therapy.
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Affiliation(s)
- D A Handley
- Sepracor, Inc., 111 Locke Drive, Marlborough, MA 01752, USA
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Abstract
Racemic salbutamol (racemic albuterol) ameliorates symptoms of asthma by activating beta-adrenoceptors on nerve, smooth muscle and inflammatory cells within the airways. Racemic salbutamol comprises equal proportions of 2 isomers: (S)-salbutamol and (R)-salbutamol, with the latter being exclusively responsible for activation of beta-adrenoceptors. Accordingly, within racemic salbutamol it is (R)-salbutamol that efficiently relieves obstruction of asthmatic airways and affords highly effective protection from bronchoconstrictor stimuli, including allergens. During regular use of racemic salbutamol, there is a progressive decline of protective efficacy and a corresponding intensification of airway responsiveness. This decline is largely absent during regular use of (R)-salbutamol. Consequently, bronchodilator responses to sub-maximal doses of (R)-salbutamol exceed responses to the equivalent dose of (R)-salbutamol given as the racemate. For example, in asthmatics with baseline FEVs <or= 60%, 1.25 mg of nebulised (R)-salbutamol achieved a maximal 52% change in FEV while 2.5 mg of racemic salbutamol only achieved a 38% change in FEV. Since extrapulmonary effects (e.g., tremor, heart rate) of beta agonists are related to dose and limit the use of beta agonist therapy, (R)-salbutamol at 0.63 mg provides uncompromised efficacy with marked reduction of side-effects. In addition to quantitative differences, the constituent isomers of salbutamol also exhibit qualitative differences. Thus, (R)-salbutamol inhibits activation of human eosinophils in vitro whereas, under the same conditions and concentrations, (S)-salbutamol augments activation of these cells. This property of (S)-salbutamol may explain why eosinophilia in induced sputum from subjects with allergic asthma is increased by regular use of racemic salbutamol. Similarly, the capacity of (R)-salbutamol to suppress hyperresponsiveness of the airways can be contrasted with the capacity of (S)-salbutamol to intensify hyperresponsiveness. This action of (S)-salbutamol would explain why regular use of racemic salbutamol intensifies the bronchoconstrictor response to antigen in subjects with allergic asthma. Taken together, these findings imply that replacement of racemic salbutamol by (R)-salbutamol will diminish, or even eliminate, the anomalous actions that have curtailed the efficacy of racemic salbutamol. Pharmacokinetically, (R)-salbutamol exhibits near absolute conformational stability (i.e., no conversion to (S)-salbutamol). If in vitro anti-inflammatory actions of (R)-salbutamol are also manifest in asthmatic airways, (R)-salbutamol could provide a novel approach to asthma therapy which combines bronchodilation and bronchoprotection with anti-inflammatory efficacy.
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Affiliation(s)
- D A Handley
- Sepracor, Inc., 111 Locke Drive, Marlborough, MA 01752, USA
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Affiliation(s)
- J Morley
- Kings College Sackler Institute of pulmonary Pharmacology, Guys Campus Fifth floor Hodgkin, London, UK.
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Abstract
OBJECTIVE To assess the ability of basal and stimulated C-peptide levels and stimulated glucose values after oral administration of glucose to predict a successful response to metformin and troglitazone combination therapy after discontinuation of insulin therapy. METHODS At the onset of the study, plasma glucose and C-peptide levels were measured in a group of 64 obese patients with insulin-treated type 2 diabetes while they were fasting and 2 hours after a challenge of 100 g of glucose administered orally. Then combination metformin-troglitazone treatment was initiated while insulin therapy was gradually tapered over 8 to 12 weeks. Subjects who successfully tolerated insulin withdrawal after the metformin-troglitazone combination were categorized as non-insulin-requiring responders, whereas those who needed insulin to obtain glycemic control were categorized as insulin-requiring nonresponders. Basal and glucose-stimulated C-peptide levels as well as stimulated glucose values were contrasted in the responder versus nonresponder groups. In a second protocol, eight obese patients with insulin-treated type 2 diabetes who successfully stopped insulin therapy were reassessed for C-peptide and glucose variables during the 2-hour oral glucose tolerance test. This reassessment followed a 12-week period of therapy to determine whether treatment of insulin resistance with the combination of metformin and troglitazone could normalize the impaired glucose tolerance in type 2 diabetes. RESULTS After metformin-troglitazone therapy, 48 study subjects (75%) could later be managed without insulin, whereas 16 (25%) needed insulin to achieve acceptable glycemic control. In a comparison of the non-insulin-requiring responder and insulin-requiring nonresponder groups, the responder group had significantly higher glucose-stimulated C-peptide levels and much lower stimulated glucose levels. The mean basal plasma C-peptide level was higher in the responder than in the nonresponder group, but a small degree of overlap was found between the two groups. Combination treatment with metformin and troglitazone for 12 weeks resulted in a significant reduction in the C-peptide response and glucose variables after the glucose load. CONCLUSION The results of this study indicate that stimulated C-peptide and glucose levels may be useful criteria to identify whether combination metformin-troglitazone treatment can successfully replace insulin therapy in the management of obese patients with type 2 diabetes. Inability to normalize glucose intolerance after restoring insulin resistance with insulin sensitizers is supportive of the presence of both disturbed beta-cell function and insulin resistance in patients with type 2 diabetes.
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Affiliation(s)
- A Lee
- Department of Medicine, St. Louis University Medical Center, St. Louis, Missouri, USA
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Mittal R, Morley J, Dinopoulos H, Drakoulakis EG, Vermani E, Giannoudis PV. Use of bio-resorbable implants for stabilisation of distal radius fractures: the United Kingdom patients' perspective. Injury 2005; 36:333-8. [PMID: 15664600 DOI: 10.1016/j.injury.2004.09.015] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 09/13/2004] [Indexed: 02/02/2023]
Abstract
Bio-resorbable implants have been, recently, introduced in the United Kingdom. To our knowledge there have been no randomised studies to assess perception of today's well-informed patients about this new method of fracture stabilisation. In order to assess the patients' perception a prospective study was performed on 100 consecutive adult patients with distal radius fractures. Following detailed verbal and written information about both resorbable and metal implants, the patients were asked to complete a specifically designed questionnaire. Ninety-five percent of the patients appreciated the 'resorbable' feature and responded that they would prefer to have their fracture stabilised with a resorbable implant. Conversely, 91% of the participants considered removal as the most negative aspect of the metal implant (p<0.0001). While 56% of the patients felt that it was relatively a new and evolving technology, 29% of them had apprehension about the relative strength of the resorbable implant. Eighty percent of the patients stated that they would be happy to participate in clinical trials to compare the use of bio-resorbable implants versus metal ones (p=0.0001). This study sets the foundation for the implementation of prospective randomised trials to assess the efficacy of the new generation of bio-resorbable implants.
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Affiliation(s)
- R Mittal
- Department of Trauma and Orthopaedic Surgery, St. James's University Hospital, Leeds LS9 7TF, UK
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