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Correa J, Mehrjoo M, Battistelli R, Lehmkühler F, Marras A, Wunderer CB, Hirono T, Felk V, Krivan F, Lange S, Shevyakov I, Vardanyan V, Zimmer M, Hoesch M, Bagschik K, Guerrini N, Marsh B, Sedgwick I, Cautero G, Stebel L, Giuressi D, Menk RH, Greer A, Nicholls T, Nichols W, Pedersen U, Shikhaliev P, Tartoni N, Hyun HJ, Kim SH, Park SY, Kim KS, Orsini F, Iguaz FJ, Büttner F, Pfau B, Plönjes E, Kharitonov K, Ruiz-Lopez M, Pan R, Gang S, Keitel B, Graafsma H. The PERCIVAL detector: first user experiments. J Synchrotron Radiat 2023; 30:242-250. [PMID: 36601943 PMCID: PMC9814071 DOI: 10.1107/s1600577522010347] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Accepted: 10/26/2022] [Indexed: 06/17/2023]
Abstract
The PERCIVAL detector is a CMOS imager designed for the soft X-ray regime at photon sources. Although still in its final development phase, it has recently seen its first user experiments: ptychography at a free-electron laser, holographic imaging at a storage ring and preliminary tests on X-ray photon correlation spectroscopy. The detector performed remarkably well in terms of spatial resolution achievable in the sample plane, owing to its small pixel size, large active area and very large dynamic range; but also in terms of its frame rate, which is significantly faster than traditional CCDs. In particular, it is the combination of these features which makes PERCIVAL an attractive option for soft X-ray science.
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Affiliation(s)
- J. Correa
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
- Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - M. Mehrjoo
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - R. Battistelli
- Helmholtz Zentrum Berlin HZB, Hahn-Meitner-Platz 1, Berlin, Germany
| | - F. Lehmkühler
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
- The Hamburg Centre for Ultrafast Imaging CUI, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - A. Marras
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
- Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - C. B. Wunderer
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
- Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - T. Hirono
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
- Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - V. Felk
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
- Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - F. Krivan
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
- Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - S. Lange
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
- Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - I. Shevyakov
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - V. Vardanyan
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
- Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - M. Zimmer
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - M. Hoesch
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - K. Bagschik
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - N. Guerrini
- Science and Technology Faculties STFC, Rutherford Appleton Laboratory RAL, Didcot, United Kingdom
| | - B. Marsh
- Science and Technology Faculties STFC, Rutherford Appleton Laboratory RAL, Didcot, United Kingdom
| | - I. Sedgwick
- Science and Technology Faculties STFC, Rutherford Appleton Laboratory RAL, Didcot, United Kingdom
| | - G. Cautero
- Elettra Sincrotrone Trieste, Trieste, Italy
| | - L. Stebel
- Elettra Sincrotrone Trieste, Trieste, Italy
| | | | - R. H. Menk
- Elettra Sincrotrone Trieste, Trieste, Italy
- University of Saskatchewan, Saskatoon, Saskatchewan, Canada S7N 5A2
| | - A. Greer
- Observatory Sciences Ltd, Cambridge, United Kingdom
| | - T. Nicholls
- Science and Technology Faculties STFC, Rutherford Appleton Laboratory RAL, Didcot, United Kingdom
| | - W. Nichols
- Diamond Light Source, Didcot, United Kingdom
| | - U. Pedersen
- Diamond Light Source, Didcot, United Kingdom
| | | | - N. Tartoni
- Diamond Light Source, Didcot, United Kingdom
| | - H. J. Hyun
- Pohang Accelerator Laboratory PAL, Pohang, Gyeongbuk 37673, Republic of Korea
| | - S. H. Kim
- Pohang Accelerator Laboratory PAL, Pohang, Gyeongbuk 37673, Republic of Korea
| | - S. Y. Park
- Pohang Accelerator Laboratory PAL, Pohang, Gyeongbuk 37673, Republic of Korea
| | - K. S. Kim
- Pohang Accelerator Laboratory PAL, Pohang, Gyeongbuk 37673, Republic of Korea
| | - F. Orsini
- Synchrotron SOLEIL, Saint Aubin, France
| | | | - F. Büttner
- Helmholtz Zentrum Berlin HZB, Hahn-Meitner-Platz 1, Berlin, Germany
| | - B. Pfau
- Max-Born-Institute MBI, Max-Born-Straße 2A, Berlin, Germany
| | - E. Plönjes
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - K. Kharitonov
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - M. Ruiz-Lopez
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - R. Pan
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - S. Gang
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - B. Keitel
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - H. Graafsma
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
- Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
- Mid Sweden University, Sundsvall, Sweden
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Berry I, Mangtani P, Rahman M, Greer A, Morris S, Anwar R, Lisa M, Shirin T, Islam M, Chowdhury F, Dunkle S, Brum E, Osmani M, Flora M, Fisman D. Seasonality of Human Influenza and Co-Seasonality with Avian Influenza in Bangladesh, 2010-2019. Int J Infect Dis 2022. [DOI: 10.1016/j.ijid.2021.12.211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Greer A, Buxton JA, Pauly B, Bungay V. Organizational support for frontline harm reduction and systems navigation work among workers with living and lived experience: qualitative findings from British Columbia, Canada. Harm Reduct J 2021; 18:60. [PMID: 34090473 PMCID: PMC8179702 DOI: 10.1186/s12954-021-00507-2] [Citation(s) in RCA: 7] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Accepted: 05/24/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The inclusion of people with lived and living experience of substance use is essential to effective and client-centered harm reduction services and strategies. The aim of this study is to critically examine and characterize peer worker roles and the definition, recognition, and support for these roles within harm reduction organizations. METHODS Fifteen interviews were conducted with peer workers-people with lived and living experience of substance use engaged in harm reduction service delivery-in British Columbia, Canada. An interpretive descriptive approach to data analysis was used to generate themes that best illustrated the roles of peer workers. FINDINGS Two interrelated and overarching themes are presented: (1) peer work in practice; (2) organizational support. Our findings illustrate that peer work is incredibly complex and demanding, requiring peers to be at the forefront of support within their communities while simultaneously navigating the oppressive structures within which they work. While peer workers found a high degree of purpose and meaning in their day-to-day work, their roles lacked definition within organizations, which produced feelings of ineffectiveness and being undervalued. A lack of organizational understanding and recognition of their roles was evident from unclear "peer" role titles, a lack of role communication and expectations, the representation of experiential knowledge, and a lack of role support and training. CONCLUSIONS These findings may help harm reduction organizations understand peer work and worker roles which may inform and promote equity in future harm reduction initiatives that include people with living and lived experience of substance use.
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Affiliation(s)
- A Greer
- School of Criminology, Simon Fraser University, 8888 University Drive, Burnaby, BC, V5A 1S6, Canada.
| | - J A Buxton
- School of Population and Public Health, University of British Columbia, 2206 East Mall, Vancouver, BC, V6T 1Z3, Canada
| | - B Pauly
- School of Nursing, University of Victoria, PO Box 1700 STN CSC, Victoria, BC, V8W 2Y2, Canada
| | - V Bungay
- School of Nursing, University of British Columbia, T201-2211 Wesbrook Mall, Vancouver, BC, V6T 2B5, Canada
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Oduoza U, Mamarelis G, Chekuri R, Estfan R, Greer A. 174 SARS-Cov-2 Increases The 30-Day Mortality in Hip Fracture Patients. A UK District Hospital’s Experience. Br J Surg 2021. [PMCID: PMC8135743 DOI: 10.1093/bjs/znab134.042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Introduction Coronavirus disease 2019 (COVID-19) is a worldwide pandemic with a case mortality ratio of approximately 6.4%. Hip fracture patients are vulnerable if contracting COVID-19. Evidence is lacking regarding the mortality rate of hip fracture patients admitted during the COVID-19 pandemic. Method Retrospective review of all patients admitted to Southend University Hospital from March – April 2020. Demographic data (age, BMI, gender, co-morbidities) along with diagnosis of COVID-19 (clinical + (radiology +/- microbiology positive) and operative characteristics (time to operation, length of stay, ASA grading, Nottingham Hip Fracture Score), blood tests. Primary outcome was 30-day mortality rate in COVID-19 positive/negative patients who had hip fracture. Results 41 patients were included in the study of which 37 had a COVID-19 swab. Overall mortality in the group was 22%. Eleven patients tested positive for COVID-19. There was a statistically significant difference in mortality between those testing positive compared to those testing negative (54.5% versus 7,69% respectively, Fisher’s exact test, p = 0.004) and when comparing those who had an operation and tested positive for COVID-19 against those who had an operation and tested negative (37.5% versus 4,34% respectively, Fisher’s exact test, p = 0.043). Conclusions COVID-19 increases the 30-day mortality in neck of femur fracture patients.
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Affiliation(s)
- U Oduoza
- Southend University Hospital, Westcliff on sea, United Kingdom
| | - G Mamarelis
- Southend University Hospital, Westcliff on sea, United Kingdom
| | - R Chekuri
- Southend University Hospital, Westcliff on sea, United Kingdom
| | - R Estfan
- Southend University Hospital, Westcliff on sea, United Kingdom
| | - A Greer
- Southend University Hospital, Westcliff on sea, United Kingdom
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Dubin J, Rainer Q, Balaji N, Shoag J, Greer A, Paz L, Kava B, Troesch V, Monga V, Clifford L, Terry W, Alperstein W, Pearlman A, Ramasamy R. 019 Sexual Health Among Adolescent Young Adult Males with Cancer: An Update. J Sex Med 2021. [DOI: 10.1016/j.jsxm.2021.01.089] [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: 12/01/2022]
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Greer A, Bungay V, Pauly B, Buxton J. 'Peer' work as precarious: A qualitative study of work conditions and experiences of people who use drugs engaged in harm reduction work. Int J Drug Policy 2020; 85:102922. [PMID: 32911320 DOI: 10.1016/j.drugpo.2020.102922] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 08/20/2020] [Accepted: 08/24/2020] [Indexed: 12/19/2022]
Abstract
In this study, we examine the qualitative accounts of people who use drugs engaged in 'peer' work in harm reduction settings across British Columbia, Canada. We found peer work was precarious, characterized by nonstandard or casual work arrangements, high job instability and insecurity, insufficient wages, and limited social benefits. Participants were reluctant to exercise their rights or negotiate work conditions, such as higher wages or more consistent work, out of fear of job loss. However, the flexibility of peer work was beneficial for some in that it worked within their life circumstances and provided a low-barrier entry into the labor market. If inequities in peer work are perpetuated, unrecognized and unaddressed, precarious work conditions may continue to undermine the potential benefits of harm reduction work for organizations, peer workers and the people to whom they engage with and support. This study adds people who use drugs to the many social groups that are impacted by precarious work conditions globally.
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Affiliation(s)
- A Greer
- School of Criminology, Simon Fraser University, 8888 University Drive, Burnaby BC, V5A 1S6, Canada.
| | - V Bungay
- School of Nursing, University of British Columbia, T201-2211 Wesbrook Mall, Vancouver, BC V6T 2B5, Canada
| | - B Pauly
- School of Nursing, University of Victoria, O Box 1700 STN CSC, Victoria BC V8W 2Y2, Canada
| | - J Buxton
- School of Population and Public Health, University of British Columbia, 2206 East Mall Vancouver, BC V6T 1Z3, Canada
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Smethells JR, Greer A, Dougen B, Carroll ME. Effects of voluntary exercise and sex on multiply-triggered heroin reinstatement in male and female rats. Psychopharmacology (Berl) 2020; 237:453-463. [PMID: 31712970 PMCID: PMC7023997 DOI: 10.1007/s00213-019-05381-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Accepted: 10/16/2019] [Indexed: 12/24/2022]
Abstract
BACKGROUND The rise in heroin addiction has heightened the need for novel and effective treatments. Physical exercise has been shown as an effective treatment for stimulant abuse in clinical and pre-clinical research. However, this treatment has not yet been tested on opioid addiction. This study examined the effects of physical activity (wheel running) on heroin-seeking in rats within a reinstatement paradigm (i.e., heroin relapse model). METHODS Female and male rats were trained to self-administer intravenous heroin (0.015 mg/kg). Once trained, rats were placed into extinction (i.e., heroin abstinence) for 21 days with continuous access to a locked or unlocked running wheel. After extinction, rats were tested for drug- (heroin, caffeine, and yohimbine) and cue-primed reinstatement of heroin-seeking. RESULTS Females completed more wheel revolutions than males across all study phases. Access to an unlocked running wheel reduced extinction and reinstatement of heroin-seeking, with greater reductions in females than males across several reinstatement conditions. In the locked wheel group, female rats showed greater reinstatement of heroin-seeking than males across several priming conditions. CONCLUSIONS Wheel running reduced heroin-seeking in male and female rats, with females showing a more robust effect during reinstatement. The locked wheel group allowed an examination of sex differences in heroin reinstatement, which revealed that females showed greater vulnerability to heroin reinstatement than males, but with no other sex differences observed in maintenance or extinction. Overall, the results indicate that voluntary physical exercise may be an effective treatment for heroin dependence in humans.
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Affiliation(s)
- J. R. Smethells
- Research Fellow, Pharmaco-Neuro-Immunology Training Program,University of Minnesota, Minneapolis, MN, USA,Hennepin Healthcare Research Institute, Minneapolis, MN, USA
| | - A. Greer
- Department of Biological Science, University of Minnesota, Minneapolis, MN, USA
| | - B. Dougen
- Department of Psychiatry, University of Minnesota Medical School, Minneapolis, MN, USA
| | - M. E. Carroll
- Department of Psychiatry, University of Minnesota Medical School, Minneapolis, MN, USA
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Dubin J, Rainer Q, Shoag J, Greer A, Nackeeran S, Rodriguez A, Patel P, Kava B, Alperstein W, Ramasamy R. 167 Barriers to Evaluate Sexual Health Among Adolescent Young Adult Males with Cancer. J Sex Med 2020. [DOI: 10.1016/j.jsxm.2019.11.113] [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: 10/25/2022]
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Greer A, Ramos L, Dubin J, Ramasamy R. 118 Effect of Limiting Narcotic Prescription on Pain Control Following Ambulatory Scrotal Surgery. J Sex Med 2020. [DOI: 10.1016/j.jsxm.2019.11.064] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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10
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Dubin J, Greer A, Ramasamy R, Kava B. 166 Attitudes, Practices, and Barriers to Sexual Health Assessments of Patients Amongst Practicing Oncologists: Survey Data from a Group of Local Oncology Healthcare Providers. J Sex Med 2020. [DOI: 10.1016/j.jsxm.2019.11.112] [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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11
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Dubin J, Greer A, Valentine C, O'Brien I, Leue E, Paz L, Winter A, Ramasamy R. 148 Evaluation of Female Sexual Dysfunction in Adult Entertainers. J Sex Med 2019. [DOI: 10.1016/j.jsxm.2019.01.156] [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: 10/27/2022]
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Dubin J, Greer A, Carrasquillo R, O'Brien I, Leue E, Ramasamy R. 018 Erectile Dysfunction Among Male Adult Entertainers: A Survey. J Sex Med 2019. [DOI: 10.1016/j.jsxm.2019.01.030] [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: 10/27/2022]
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Mallia G, Van Toen J, Rousseau J, Jacob L, Boerlin P, Greer A, Metcalf D, Weese J. Examining the epidemiology and microbiology of Clostridium difficile carriage in elderly patients and residents of a healthcare facility in southern Ontario, Canada. J Hosp Infect 2018; 99:461-468. [DOI: 10.1016/j.jhin.2018.01.020] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Accepted: 01/27/2018] [Indexed: 11/28/2022]
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Greer A, Irie K, Hashim A, Leroux BG, Chang AM, Curtis MA, Darveau RP. Site-Specific Neutrophil Migration and CXCL2 Expression in Periodontal Tissue. J Dent Res 2016; 95:946-52. [PMID: 27013641 DOI: 10.1177/0022034516641036] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
The oral microbial community is the best-characterized bacterial ecosystem in the human host. It has been shown in the mouse that oral commensal bacteria significantly contribute to clinically healthy periodontal homeostasis by influencing the number of neutrophils that migrate from the vasculature to the junctional epithelium. Furthermore, in clinically healthy tissue, the neutrophil response to oral commensal bacteria is associated with the select expression of the neutrophil chemokine CXCL2 but not CXCL1. This preliminary study examined the contribution of commensal bacteria on neutrophil location across the tooth/gingival interface. Tissue sections from the root associated mesial (anterior) of the second molar to the root associated distal (posterior) of the second molar were examined for neutrophils and the expression of the neutrophil chemokine ligands CXCL1 and CXCL2. It was found that both the number of neutrophils as well as the expression of CXCL2 but not CXCL1 was significantly increased in tissue sections close to the interdental region, consistent with the notion of select tissue expression patterns for neutrophil chemokine expression and subsequent neutrophil location. Furthermore, mice gavaged with either oral Streptococcus or Lactobacillus sp. bacteria induced a location pattern of neutrophils and CXCL2 expression similar to the normal oral flora. These data indicate for the first time select neutrophil location and chemokine expression patterns associated with clinically healthy tissue. The results reveal an increased inflammatory load upon approaching the interproximal region, which is consistent with the observation that the interproximal region often reveals early clinical signs of periodontal disease.
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Affiliation(s)
- A Greer
- Department of Periodontics, School of Dentistry, University of Washington, Seattle, WA, USA
| | - K Irie
- Department of Preventive Dentistry, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - A Hashim
- Centre for Immunology and Infectious Disease, Blizard Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - B G Leroux
- Department of Oral Health Sciences, School of Dentistry, University of Washington, Seattle, WA, USA
| | - A M Chang
- Department of Periodontics, School of Dentistry, University of Washington, Seattle, WA, USA
| | - M A Curtis
- Centre for Immunology and Infectious Disease, Blizard Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - R P Darveau
- Department of Periodontics, School of Dentistry, University of Washington, Seattle, WA, USA
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Gofron KJ, Lauer K, Nazaretski E, Yan H, Kalbfleisch S, Greer A, Dalesio B, Chu YS. Piezo control for 1 nm spatial resolution synchrotron X-ray microscopy. ACTA ACUST UNITED AC 2014. [DOI: 10.1088/1742-6596/493/1/012026] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Bertrand B, Harman T, Greer A, Wall-Bassett E, Pettus A. Student Perspectives of Case Based Learning in Undergraduate Nutrition Courses. J Acad Nutr Diet 2013. [DOI: 10.1016/j.jand.2013.06.168] [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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Kaiser AM, Gray AX, Conti G, Son J, Greer A, Perona A, Rattanachata A, Saw AY, Bostwick A, Yang S, Yang SH, Gullikson EM, Kortright JB, Stemmer S, Fadley CS. Suppression of near-Fermi level electronic states at the interface in a LaNiO3/SrTiO3 superlattice. Phys Rev Lett 2011; 107:116402. [PMID: 22026689 DOI: 10.1103/physrevlett.107.116402] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2011] [Indexed: 05/31/2023]
Abstract
Standing-wave-excited photoemission is used to study a SrTiO3/LaNiO3 superlattice. Rocking curves of core-level and valence band spectra are used to derive layer-resolved spectral functions, revealing a suppression of electronic states near the Fermi level in the multilayer as compared to bulk LaNiO3. Further analysis shows that the suppression of these states is not homogeneously distributed over the LaNiO3 layers but is more pronounced near the interfaces. Possible origins of this effect and its relationship to a previously observed metal-insulator-transition in ultrathin LaNiO3 films are discussed.
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Affiliation(s)
- A M Kaiser
- Department of Physics, University of California, Davis, California 95616, USA
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Haluska P, Hou X, Huang F, Harrington S, Greer A, Macedo L, Brodie A, Evans D, Carboni J, Gottardis M. Complete IGF Signaling Blockade by the Dual-Kinase Inhibitor, BMS-754807, Is Sufficient To Overcome Tamoxifen and Letrozole Resistance In Vitro and In Vivo. Cancer Res 2009. [DOI: 10.1158/0008-5472.sabcs-09-402] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Resistance to hormonal therapy is a clinically unmet need in breast cancer. IGF signaling has been identified as a major mechanism of resistance to hormonal therapy in breast cancer. As components of the IGF signaling pathway are expressed in most breast cancers, the development of IGF-1R monoclonal antibody (mAb) and tyrosine kinase inhibitors (TKI) are active areas of clinical investigations. A key distinction between the mAb and TKIs are their differences in their ability to inhibit the Insulin Receptor (InsR). While targeting the InsR with TKIs may have a theoretical liability of hyperglycemia, targeting only the IGF-1R may have the theoretical liability of incompletely blocking IGF signaling. As InsR isoform A expression, which can transduce IGF-II-mediated proliferation, is higher in breast cancers compared to normal breast tissue, we investigated whether IGF-1R or IGF-1R/InsR inhibition was sufficient for overcoming resistance to hormonal therapy. To determine the optimal combination strategies for clinical investigations, we tested the hypothesis that IGF signaling inhibition could overcome primary (or de novo/intrinsic) and secondary (or acquired/selected) resistance to hormonal therapy. For these studies, we used either hormone therapy-naïve or hormone therapy-resistant variants of the breast cancer model, MCF-7/AC-1, which has been engineered to stably express full-length human aromatase. We employed and compared a novel, potent dual kinase inhibitor of the IGF-1R and InsR, BMS-754807, which is currently in early clinical investigations, with the IGF-1R antibody mAb391. BMS-754807 has been shown to induce apoptosis more potently than mAb391 in Rh41 human rhabdomyosarcoma cells. In vitro, BMS-754807 demonstrated profound synergy in combination with tamoxifen and letrozole (median effect combination index <0.1). In vivo, BMS-754807 enhanced the anti-tumor activity of tamoxifen and letrozole in hormone-naïve tumors and induced regression of tumors resistant to tamoxifen or letrozole when combined with letrozole. This activity was not observed with mAb therapy, which resulted in greater up-regulation of InsR-A and erbB receptor expression and activation. This suggested a greater susceptibility to resistance pathways with mAb therapy. Dual IGF-1R/InsR blockade alone or in combination was tolerated by the animals and has no significant change in glucose homeostasis. Gene expression profiling experiments to compare the difference between the effects of tamoxifen in combination with BMS-754807 and with mAb revealed alternative pathway signaling is one of the potential mechanisms of resistance.In summary, combined hormonal therapy with BMS-754807 overcomes primary and secondary resistance to tamoxifen and letrozole and was well tolerated. IGF-1R blockade with a mAb alone is insufficient to overcome resistance and induces InsR over-expression. Thus, IGF signaling through either InsR or IGF-1R may be a major mechanism of resistance to hormonal therapy. These data suggest that blockade of IGF-1 and IGF-II from activation of IGF-1R and InsR, with agents such as BMS-754807 have promise in extending the benefits of hormonal therapy in breast cancer.
Citation Information: Cancer Res 2009;69(24 Suppl):Abstract nr 402.
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Affiliation(s)
| | | | | | | | | | | | | | - D. Evans
- 4Novartis Pharma AG, Switzerland
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20
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Ellison J, Thomson AJ, Conkie JA, McCall F, Walker D, Greer A. Thromboprophylaxis following caesarean section--a comparison of the antithrombotic properties of three low molecular weight heparins--dalteparin, enoxaparin and tinzaparin. Thromb Haemost 2001; 86:1374-8. [PMID: 11776302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
Pharmacological thromboprophylaxis is increasingly being used after caesarean section to prevent venous thromboembolism. Although a variety of low molecular weight heparins (LMWH) have been used no comparative study exists on their effects on the haemostatic system in this situation. Furthermore, their antithrombotic effect may be mediated through effects other than their inhibitory effect on activated factor X. We compared the plasma anti-factor Xa activity, plasma concentration of tissue factor pathway inhibitor (TFPI) and the reduction in plasma thrombin-antithrombin (TAT) complex concentration in 30 women randomised to receive either dalteparin 5,000 IU anti-Xa once daily (n = 10), enoxaparin 4,000 IU anti-Xa once daily (n = 10) or tinzaparin 50 IU/kg anti-Xa (average dose 3,650 anti-Xa units) once daily (n = 10) following caesarean section. Sampling occurred at 0, 1, 3, 6, 12 and 24 h relative to time of dosing. All preparations produced an increase in mean anti-Xa assay (p < 0.0001), a reduction in mean TAT (p < 0.05) and an increase in mean TFPI concentration (p <0.05). Analysis of variance (ANOVA) revealed a significant difference between the LMWHs in terms of mean anti-factor Xa activity (p < 0.005) and reduction in plasma TAT concentration (p < 0.005). Post hoc analysis indicated that the anti-Xa values of the groups receiving enoxaparin and dalteparin were significantly higher than those of the group receiving tinzaparin (p < 0.05), but not significantly different from each other. Post hoc analysis of the reduction in plasma TAT concentration showed the reduction to be significantly less in the group receiving enoxaparin compared to the dalteparin and tinzaparin groups (p < 0.05), which did not differ significantly from each other. There was no significant difference between treatment groups with regard to plasma concentration of TFPI. These findings demonstrate that LMWHs differ in their effects on haemostatic parameters including thrombin generation as assessed by TAT. The increase in TFPI may be an additional mediator of LMWH's antithrombotic effects. Although these findings demonstrate that LMWHs differ in their haemostatic effects, this does not necessarily infer a clinical difference between these agents.
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Affiliation(s)
- J Ellison
- Glasgow University Department of Obstetrics and Gynaecology, Glasgow Royal Infirmary, UK.
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21
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Greer A. On the origin of cytotoxicity of the natural product varacin. A novel example of a pentathiepin reaction that provides evidence for a triatomic sulfur intermediate. J Am Chem Soc 2001; 123:10379-86. [PMID: 11603989 DOI: 10.1021/ja016495p] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.0] [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: 11/28/2022]
Abstract
A density functional theoretical study is presented, which implicates a novel S(3)-cleavage in the decomposition of a pentathiepin. This study predicts an interconversion between a pentathiepin and an open-chain polysulfur ion intermediate from which a key determinant in the chemistry then follows. Expulsion of diatomic sulfur, S(2), is unlikely from the unimolecular collapse of the open-chain polysulfur ion. Instead, S(3) can dissociate due to an unusually long and weak sulfur-sulfur (S4-S5) bond. A mechanistic picture now emerges which predicts that the novel S-S cleavage reaction and the unanticipated S(3) fragmentation are a result of delocalization of the negative charge within the remaining carbon-sulfur fragment. The computed results presented here reveal a new aspect to the chemistry of pentathiepins, that of S(3) unit transfer, which is proposed to have significance in the mechanism of cytotoxicity of the natural product varacin, 1.
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Affiliation(s)
- A Greer
- Department of Chemistry, Graduate School and University Center and The City University of New York (CUNY), Brooklyn College, Brooklyn, New York 11210, USA
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22
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Abstract
We report that the photodeoxygenation of 1,2-benzodiphenylene sulfoxide, 1, generates an intermediate capable of oxidizing the solvent benzene to phenol. The reactivity of the intermediate was probed with various substrates (2-methylbutane, chloride ion, and para-substituted aryl sulfides). The intermediate produced in the sulfoxide photodeoxygenation displays an electrophilic oxidation chemistry. Our data on 1 contrast with the behavior of hydroxyl radical but resemble the chemistry observed for gas-phase atomic oxygen [O((3)P)] and for solution-phase photodeoxygenations of dibenzothiophene sulfoxide, 3, and pyridine N-oxide, 5. Correlations are made between the ionization potential of the acceptor molecules and the logarithm of the relative rate constants in order to advance the idea that the oxidizing agent of the title reaction may be solution-phase O((3)P).
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Affiliation(s)
- E Lucien
- Department of Chemistry, Graduate School and University Center, Brooklyn College, Brooklyn, New York 11210, USA
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23
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Abstract
The structural and energetic features of the attractive intramolecular through-space S-X interaction [X being oxygen (O) or sulfur (S)] of thioester containing 3-isothiazolidinone 1-oxide heterocycles are described. Density functional theoretical and semiempirical calculations are used to explain the previous X-ray data on 3-isothiazolidinone 1-oxides 5 and 6 [Kanda, Y., Ashizawa, T. , Kakita, S., Takahashi, Y., Kono, M., Yoshida, M., Saitoh, Y., and Okabe, M. (1999) J. Med. Chem. 42, 1330-1332] and implicate a mechanism where the adjacent thioester participates in an apical-directed stabilization of the sulfur heterocycle. A key factor that distinguishes the S-O interaction from the S-S interaction is the stronger through-space interaction of the former, which is a consequence of the greater electronegativity of apical O compared to apical S. Reaction field theory reveals that the conversion of the S-O interaction to the S-S interaction is more facile compared to gas phase computations, which suggest a reduced importance of the 1,5-S-X interactions in solution. The conversion of the S-O interaction to the S-S interaction gives an isothiazolidinone oxide that places the reacting sulfurs in proximity with an orientation presumably suitable for bond formation and access to the dithiolanone oxide surface. Factors that influence the through-space S-X interactions may represent important issues in identifying target 3-isothiazolidinone 1-oxide prodrugs capable of rearranging to 1,2-dithiolan-3-one 1-oxide drugs.
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Affiliation(s)
- R Reznik
- Department of Chemistry, Graduate School, and University Center, The City University of New York, Brooklyn College, Brooklyn, New York 11210, USA
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24
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Abstract
We describe here a study on the intramolecular nonbonded 1, 5-sulfur-oxygen (S-O) interaction in the antitumor antibiotic leinamycin 1. The results from density-functional theoretical and semiempirical calculations on leinamycin 1 and model systems 2-5 provide evidence for the 1,5-S-O nonbonded interaction. Our results are used to explain previous experimental data on the X-ray structure of leinamycin 1 (Hirayama, N.; Matsuzawa, E. S. Chem. Lett. 1993, 1957). The amide oxygen (O5) alters the thiosulfinate ester conformation and stabilizes the 1,2-dithiolan-3-one 1-oxide heterocycle. The attractive interaction induces S1 of leinamycin to adopt a distorted trigonal bipyramidal geometry. The magnitude of this stabilizing interaction is approximately 6 kcal/mol.
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Affiliation(s)
- S Wu
- Department of Chemistry, Graduate School and University Center & The City University of New York (CUNY), Brooklyn College, Brooklyn, New York 11210, USA
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25
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Lilley SH, Clay M, Greer A, Harris J, Cummings HD. Interdisciplinary rural health training for health professional students: strategies for curriculum design. J Allied Health 1999; 27:208-12. [PMID: 9879027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
Abstract
Interdisciplinary rural health program offer a promising solution to the challenge of preparing graduates for rural practice, with the ultimate goal of promoting better health care for rural populations. This article focuses on the three-year experience of a model interdisciplinary rural health curriculum implemented in eastern North Carolina. Ten strategies are presented as a framework for the design and implementation of an effective practice-based curriculum for interdisciplinary rural health training. Allied health educators should examine existing curriculum models to build upon their strengths and explore new models to meet evolving delivery system and consumer needs.
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Affiliation(s)
- S H Lilley
- East Carolina University, Greenville, NC 27858, USA.
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26
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Dineen T, Nolan A, Harrington J, Greer A, Kennedy R, Houghton JA. Fluorescence in situ hybridization studies on the sex chromosome constitution of human sperm. Arch Androl 1997; 39:217-22. [PMID: 9352033 DOI: 10.3109/01485019708987919] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
More males are conceived than females and more males are born as a result of in vitro fertilization (IVF) and donor insemination procedures. All donor sperm samples are frozen for a minimum of 6 months before they are used. The ratio of more boys to girls has been consistently reported over the years. A similar finding has been noted in the Galway Fertility Unit at University College Hospital Galway, Ireland. Traditionally, it has been accepted that the reason for this excess is that a Y chromosome-bearing sperm swims faster than the X-bearing sperm because it contains less DNA and is therefore "lighter." To test this hypothesis, semen samples were collected at the Galway Fertility Unit from men presenting for routine semen assessments. Each sample was divided into a number of aliquots. The first aliquot was assessed as the "raw" ejaculate to measure the initial ratio of X to Y. The second aliquot was prepared using Percoll density gradients, which allows for greater recovery of sperm with higher motility and improved sperm function. The final aliquot was frozen. The frozen sample was later thawed and prepared using Percoll. The prepared sperm were kept for 48 h and sampled at the time of preparation and at 24 h and 48 h to establish if there was any differential survival over time. The X:Y ratio was analyzed using the technique of fluorescence in situ hybridization (FISH). This allowed the sex chromosomes to be specifically stained and identified simultaneously. No difference was found in the X:Y ratio of the sperm. Therefore, any selection for the Y sperm must take place at some later stage.
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Affiliation(s)
- T Dineen
- Cytogenetics Unit, University College, Galway, Ireland
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27
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Abstract
Rational engineering of enzymes involves introducing key amino acids guided by a knowledge of protein structure to effect a desirable change in function. To date, all successful attempts to change specificity have been limited to substituting individual amino acids within a protein fold. However, the infant field of protein engineering will only reach maturity when changes in function can be generated by rationally engineering secondary structures. Guided by x-ray crystal structures and molecular modeling, site-directed mutagenesis has been used to systematically invert the coenzyme specificity of Thermus thermophilus isopropylmalate dehydrogenase from a 100-fold preference for NAD to a 1000-fold preference for NADP. The engineered mutant, which is twice as active as wild type, contains four amino acid substitutions and an alpha-helix and loop that replaces the original beta-turn. These results demonstrate that rational engineering of secondary structures to produce enzymes with novel properties is feasible.
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Affiliation(s)
- R Chen
- Department of Biological Chemistry, Chicago Medical School, IL 60064-3095, USA
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28
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Whitehead H, Holmes J, Roberts R, al-Mandhari NA, Greer A, Thom R, Donnelly P, Carson D, Traub AI, Hadden D. Maternal phenylketonuria 1987 to 1993, pregnancy outcome and early infant development: the Northern Ireland experience. Br J Obstet Gynaecol 1996; 103:1041-4. [PMID: 8863706 DOI: 10.1111/j.1471-0528.1996.tb09558.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- H Whitehead
- Sir George E. Clark Metabolic Unit, Royal Victoria Hospital, Belfast, UK
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29
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Abstract
To document the scope of recent trends in performing pretrial mental health evaluations, telephone interviews were conducted with 157 authorities in 50 states and the District of Columbia. These authorities included forensic mental health program directors and forensic clinical professionals. In all states, evaluations were made on an outpatient basis to some extent, and 45 states used inpatient evaluations. However, only ten states relied primarily on inpatient pretrial evaluations, generally in facilities with statewide catchment areas. A total of 32 states relied primarily on outpatient evaluations, generally conducted by providers with regional or local catchment areas.
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Affiliation(s)
- T Grisso
- Department of Psychiatry, University of Massachusetts Medical School, Worcester 01655, USA
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30
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Abstract
The isocitrate dehydrogenase of Escherichia coli, which lacks the Rossmann fold common to other dehydrogenases, displays a 7000-fold preference for NADP over NAD (calculated as the ratio of kcat/Km). Guided by x-ray crystal structures and molecular modeling, site-directed mutagenesis has been used to introduce six substitutions in the adenosine binding pocket that systematically shift coenzyme preference toward NAD. The engineered enzyme displays an 850-fold preference for NAD over NADP, which exceeds the 140-fold preference displayed by a homologous NAD-dependent enzyme. Of the six mutations introduced, only one is identical in all related NAD-dependent enzyme sequences--strict adherence to homology as a criterion for replacing these amino acids impairs function. Two additional mutations at remote sites improve performance further, resulting in a final mutant enzyme with kinetic characteristics and coenzyme preference comparable to naturally occurring homologous NAD-dependent enzymes.
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Affiliation(s)
- R Chen
- Department of Biological Chemistry, Chicago Medical School, North Chicago, IL 60064, USA
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31
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Abstract
The present study was conducted to investigate the spelling ability of persons affected by mild Alzheimer's disease (AD). AD subjects produced more phonemically implausible (PI) spelling errors (e.g. enough-->enougigh) than normal subjects; in addition, AD subjects produced a higher percentage of PI spelling errors than normal AD subjects. We found that two clinical visual attention tests were better predictors of the number of PI spelling errors than a language measure. Moreover, we also found that AD subjects performed more poorly when they copied words that were viewed and removed from sight than when the same words were copied directly. In contrast, there was no significant difference in the performance of the normal elderly on direct and delayed copying tasks. AD subjects produced more errors when spelling long words than when spelling short words. Although the spelling performance of the normal elderly was also affected by the length of the words spelled, AD subjects showed a significantly greater drop in performance than normal subjects when the length of the words increased. The vocabulary of the short and long word lists did not differ in frequency of occurrence or imagability (i.e. abstractness). The results suggest that visual attention impairment and not language impairment accounts for the PI spelling errors of mild AD subjects. The results are discussed with reference to graphemic buffer deficits identified in case studies of stroke patients with dysgraphia.
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Affiliation(s)
- J Neils
- Department of Communication Sciences & Disorders, University of Cincinnati, OH, USA
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32
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Affiliation(s)
- P S Appelbaum
- Department of psychiatry, University of Massachusetts Medical School, Worcester 01655
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33
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Dimitriadis E, Owens D, Collins P, Johnson A, Tomkin G, Cronin CC, Barry D, Crowley B, Ferriss JB, Hetherton AM, Smith DF, O’Herlihy C, Smyth PPA, Fiad TM, Culliton M, Dunbar J, Cunningham SK, McKenna TJ, Heaney AP, Loughrey GL, McCance DR, Mcllrath E, Hadden DR, Kennedy L, Sheridan B, Ferris JB, Whyte A, Cleary PE, McAuley DJ, Mathew B, Bailey IC, Curtin A, Lenehan K, Deegan P, Henry M, Stapleton M, Baker H, Duggan PF, Mitchell TH, O’Hare JA, Geoghegan M, Abuaisha F, Fearon U, Clarke D, Roberts RN, Traub AI, Thompson W, Whitehead H, Holmes J, Roberts R, Al-Mandhari NA, Greer A, Carson D, Traub T, Hadden D, Heaney AP, Ferguson T, Atkinson AB, O’Keeffe S, Devlin JG, Donnellan C, Russell CR, Kennedy TL, Kennedy AL, Atkinson AB, Long HA, Conway DJ, Mercer PM, Murphy D, Stokes M, Sheahan K, O’Higgins NJ, Dunne FP, Ratcliffe WA, Mansour P, Heath DA, O’Meara NM, Sturis J, Herold KC, Polonsky KS, Beatty OL, Ritchie CM, Bell PM, Kennedy AL, Clarke D, Fearon U, Levy JC, Turkington E, Hadden DW, Harper R, Ennis CN, Johnston GD, Scanlan P, Foley M, Stronge J, Firth R, Hanson RL, Jacobsson LTH, Bennett PH, Bishop DT, Knowler WC. Irish endocrine society. Ir J Med Sci 1994. [DOI: 10.1007/bf02943261] [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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34
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Appelbaum PS, Appelbaum BC, Soderlund DL, Greer A. Economic impact of outpatient psychiatric services in a university medical center. Hosp Community Psychiatry 1994; 45:376-8. [PMID: 8020927 DOI: 10.1176/ps.45.4.376] [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: 01/28/2023]
Affiliation(s)
- P S Appelbaum
- Department of psychiatry, University of Massachusetts Medical Center, Worcester 01655
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35
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Affiliation(s)
- L S Cohen
- Department of Perinatal Psychiatry, Harvard Medical School, Boston, Mass., USA
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36
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Greer A, Appelbaum PS. Civil liability of mentally ill persons. Hosp Community Psychiatry 1993; 44:617-8. [PMID: 8354498 DOI: 10.1176/ps.44.7.617] [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: 01/30/2023]
Affiliation(s)
- A Greer
- Department of Psychiatry, University of Massachusetts Medical Center, Worcester 01655
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37
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Appelbaum PS, Greer A. Confidentiality in group therapy. Hosp Community Psychiatry 1993; 44:311-2. [PMID: 8462936 DOI: 10.1176/ps.44.4.311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- P S Appelbaum
- Department of Psychiatry, University of Massachusetts Medical School, Worcester
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38
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Greer A. Canadian immigration: an earlier perspective. J Soc Polit Econ Stud 1993; 18:467-89. [PMID: 12288891] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/19/2023]
Abstract
Some aspects of past immigration to Canada are examined. The author notes that "many young Canadians today believe that Canada has always been a multi-cultural and multi-ethnic country. This is true only in so far as it was formerly divided on fairly tight geographical lines between French and British-derived populations, with a small minority of American Indians and Inuit eskimoes. However, during the nineteenth century and first decades of this century it was regarded as comprising a nation of Caucasoids, or more precisely a nation of French and of British settlers, willingly accepting only immigrants from Northwestern Europe ethnically affiliated with those two main groups."
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39
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Greer A. Integration of intradisciplinary quality assessment into a multidisciplinary approach. J Healthc Qual 1992; 14:40-4. [PMID: 10119903 DOI: 10.1111/j.1945-1474.1992.tb00052.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
One challenge for the QA professional in healthcare today is initiating, coordinating, and facilitating QA programs that cross traditional departmental and discipline barriers and bring together multidisciplinary teams. When looking at healthcare from a customer's perspective, the QA professional must not isolate what nursing does for the patient, what the medical staff does for the patient, what pharmacy does for the patient, and so on. The imperative, instead, is to evaluate the healthcare as it truly is perceived and delivered-as a team effort. This article presents one method that uses the Joint Commission on Accreditation of Healthcare Organizations' 10-step model to create an effective multidisciplinary QA program.
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Affiliation(s)
- A Greer
- Greenville Hospital System, SC
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40
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Abstract
A piece of short term consultancy work in a school for the Mentally Handicapped is described from the perspective of both the consultants and the consultees with particular reference to the process issues involved. Reasons for the high levels of stress, experienced in the exercise are explored by an examination of the contributory factors within the school and the consultancy process itself. As well as a theoretical discussion questions of practical management are considered.
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Affiliation(s)
- C Reed
- Department of Child & Family Psychiatry, Royal Aberdeen Children's Hospital
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41
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Hoge SK, Appelbaum PS, Lawlor T, Beck JC, Litman R, Greer A, Gutheil TG, Kaplan E. A prospective, multicenter study of patients' refusal of antipsychotic medication. Arch Gen Psychiatry 1990; 47:949-56. [PMID: 1977370 DOI: 10.1001/archpsyc.1990.01810220065008] [Citation(s) in RCA: 104] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Refusal of treatment with antipsychotic medication was studied prospectively in a sample of 1434 psychiatric patients admitted to four acute inpatient units in state-operated mental health facilities in Massachusetts during a 6-month period. Compared with a control group of patients who accepted prescribed antipsychotic treatment, the 103 patients who refused were older, of a higher social class, and less likely to have been prescribed antiparkinsonian medications. On admission, prior to refusal of medication, patients who refused were found to have significantly higher Brief Psychiatric Rating Scale scores than compliant patients and more negative attitudes regarding their hospitalization and past, present, and future treatment. Treatment refusal had negative effects on the hospital milieu and on the patient; refusers were more likely to require seclusion or restraint and had longer hospitalizations than treatment acceptors. Most refusal episodes ended with voluntary acceptance of treatment. In 23% of cases medications were discontinued. Only 18% of the sample reached formal, judicial review, and in every case that did, involuntary treatment was ordered. The policy implications of these findings are discussed.
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Affiliation(s)
- S K Hoge
- Department of Psychiatry, University of Massachusetts Medical Center, Worcester, MA 01655
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42
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Novitzky D, Cooper DK, Barton CI, Greer A, Chaffin J, Grim J, Zuhdi N. Triiodothyronine as an inotropic agent after open heart surgery. J Thorac Cardiovasc Surg 1989; 98:972-7; discussion 977-8. [PMID: 2682025] [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: 01/02/2023]
Abstract
Two small, randomized, blind clinical trials comparing the administration of triiodothyronine with that of placebo have been carried out in patients undergoing myocardial revascularization. In patients with a left ventricular ejection fraction of less than 30% (study I), triiodothyronine administration at the end of operation and during the initial 24 hours after operation was associated with a significantly reduced need for conventional inotropic agents (p less than 0.02) and diuretics (p less than 0.02). In patients with a left ventricular ejection fraction of greater than 40% (study II), triiodothyronine administration resulted in significantly improved stroke volume (p less than 0.01) and cardiac output (p less than 0.02) and reduced systemic (p less than 0.01) and pulmonary (p less than 0.05) vascular resistances. There were no adverse reactions to triiodothyronine in the dosages that were used. Triiodothyronine appears to be beneficial to all patients undergoing open heart surgery.
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Affiliation(s)
- D Novitzky
- Oklahoma Transplantation Institute, Baptist Medical Center, Oklahoma City, OK 73112
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44
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Abstract
Massachusetts civil commitment criteria were compared in an emergency setting with a set of criteria developed by Dr. Alan Stone. Contrary to expectations, the Stone criteria proved to be more restrictive in a sample of 503 patients. Few patients would be newly committable under the Stone criteria; of the 35 patients committable under the Stone standard, 32 also met the current Massachusetts criteria for commitment. The clinical and policy implications of the adoption of the Stone criteria are discussed.
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Affiliation(s)
- S K Hoge
- University of Massachusetts Medical Center, Department of Psychiatry, Worcester 01605
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45
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Cooper DK, Romero CA, Clark RM, Chaffin J, Greer A, Novitzky D, Barnard CN, Zuhdi N. Indications for heterotopic heart transplantation and report on two patients. J Okla State Med Assoc 1988; 81:513-7. [PMID: 3049988] [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: 01/03/2023]
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Hoge SK, Sachs G, Appelbaum PS, Greer A, Gordon C. Limitations on psychiatrists' discretionary civil commitment authority by the Stone and dangerousness criteria. Arch Gen Psychiatry 1988; 45:764-9. [PMID: 3395207 DOI: 10.1001/archpsyc.1988.01800320080011] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The dangerousness-oriented commitment criteria of Massachusetts were compared with the paternalistic Stone model of commitment in an emergency setting. In a sample of 1062 patients, the Stone criteria were more restrictive than the dangerousness-oriented criteria; 91 patients were committable by the Stone model compared with 218 under the present statute. A second comparison of only those patients who refused treatment yielded similar findings--52 patients were committable according to the Stone criteria compared with 80 under the Massachusetts statute. The greater restrictiveness of the Stone criteria in each comparison was in large part the result of the requirement that the treatment decisions of the patient be incompetent; in the broader sample, the criterion of major patient distress had a comparable impact. A comparison of patients committable under both standards with those patients currently committable who would be excluded under the Stone standard revealed significant differences. The dually committable patients were more likely to be psychotic, to meet statutory criteria for grave disability, and to be diagnosed as manic. The implications of the findings are discussed.
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Affiliation(s)
- S K Hoge
- Department of Psychiatry, Massachusetts Medical Center, Worcester 01605
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Fraser AA, Greer A, Jauhar P. Heroin abusers in psychiatric beds. A Glasgow study. Br J Psychiatry 1987; 151:252-4. [PMID: 3690117 DOI: 10.1192/bjp.151.2.252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
A retrospective study was carried out of all heroin abusers admitted to an acute psychiatric unit to examine their use of the facility of in-patient care. The compliance with treatment was low. Most patients discharged themselves or were discharged prematurely for using drugs while in the ward; only 21% were discharged as planned. The value of hospital admission in the management of opiate abusers may have to be reconsidered in view of the increasing prevalence of heroin abuse and the limited number of psychiatric beds.
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Affiliation(s)
- A A Fraser
- Department of Psychiatry, Duke Street Hospital, Glasgow
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Abstract
Nutritional deficiencies have been implicated in the pathophysiology of various mental disorders. Life in institutions has been associated with development of nutritional deficiencies, the elderly being most at risk especially those with senile dementia. In this study nutritional status, particularly vitamin and essential mineral status was assessed in a group of 64 new admissions to a psychogeriatric unit and 49 long-term patients. The results indicated that psychogeriatric patients were at risk of experiencing nutritional deficiencies and those with senile dementia were likely to have more abnormalities than those with functional illnesses. Those patients in long-term care would appear to have a better nutritional state than those on admission.
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Greenfield T, Greer A. Statistics for Engineers. J R Stat Soc Ser C Appl Stat 1980. [DOI: 10.2307/2346424] [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: 11/10/2022]
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Wyatt TD, Greer A. The influence of growth medium on the interactions between Bordetella pertussis and Staphylococcus aureus. J Med Microbiol 1976; 9:243-6. [PMID: 6798 DOI: 10.1099/00222615-9-2-243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Previous observers showed that many strains of Staphylococcus aureus stimulated the growth of Bordetella pertussis but we have found the reverse: the growth of all available strains of B. pertussis on charcoal-agar medium was inhibited by a standard strain of S. aureus; and 17 of 18 strains of S. aureus (as well as several other organisms) inhibited the growth of a standard strain of B. pertussis. All inhibiting colonies had an unusual brown colouration on the charcoal agar used in the investigation. Both the brown colouration and the inhibitory property were caused by acid production, probably from the starch in the medium. We therefore suggest that media containing starch and blood should not be used in studies of bacterial interference.
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