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Rizzo EA, Phillips RD, Brown JT, Leary EV, Keeney JA. Obesity Severity Predicts Patient Dissatisfaction After Total Knee Arthroplasty. J Arthroplasty 2023; 38:2492-2496. [PMID: 37276951 DOI: 10.1016/j.arth.2023.05.063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 05/20/2023] [Accepted: 05/24/2023] [Indexed: 06/07/2023] Open
Abstract
BACKGROUND Patient dissatisfaction has been reported in 15 to 20% of traditional total knee arthroplasty (TKA) procedures. While contemporary improvements may have positive effects on patient satisfaction, these may be offset by increasing obesity prevalence among patients who have knee osteoarthritis. We performed this study to determine whether obesity severity impacts patient-reported TKA satisfaction. METHODS We compared patient demographic characteristics, preoperative expectations, preoperative and minimum 1-year postoperative patient-reported outcome measures as well as postoperative satisfaction level among 229 patients (243 TKAs) who had World Health Organization (WHO) Class II or III obesity (group A), and 287 patients (328 TKAs) who had WHO classifications of normal weight, overweight, or Class I obesity (group B). RESULTS Group A patients were younger and had more severe preoperative back and contralateral knee pain, more frequent preoperative opioid medication use, and lower preoperative and postoperative patient-reported outcome measures (P < .01). A similar proportion of patients in both groups expected at least 75% improvement (68.5 versus 73.2%, P = .27). While satisfaction was higher than traditional reporting for both groups (89.4 versus 92.6%, P = .19), group A patients were less likely to be highly satisfied (68.1 versus 78.5%, P = .04) and were more likely to be highly dissatisfied (5.1 versus 0.9%, P < .01). CONCLUSIONS Patients who have Class II and III obesity report greater TKA dissatisfaction. Additional studies should help determine whether specific implant designs or surgical techniques may improve patient satisfaction or whether preoperative counseling should incorporate lower satisfaction expectations for patients who have WHO Class II or III obesity.
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Affiliation(s)
- Ennio A Rizzo
- Department of Orthopaedic Surgery, University of Missouri, Columbia, Missouri
| | - Rachel D Phillips
- Department of Orthopaedic Surgery, University of Missouri, Columbia, Missouri
| | - J Turner Brown
- Department of Orthopaedic Surgery, University of Missouri, Columbia, Missouri
| | - Emily V Leary
- Department of Orthopaedic Surgery, University of Missouri, Columbia, Missouri
| | - James A Keeney
- Department of Orthopaedic Surgery, University of Missouri, Columbia, Missouri
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Phillips RD, Walsh EC, Zürcher NR, Lalush DS, Kinard JL, Tseng CE, Cernasov PM, Kan D, Cummings K, Kelley L, Campbell D, Dillon DG, Pizzagalli DA, Izquierdo-Garcia D, Hooker JM, Smoski MJ, Dichter GS. Striatal dopamine in anhedonia: A simultaneous [ 11C]raclopride positron emission tomography and functional magnetic resonance imaging investigation. Psychiatry Res Neuroimaging 2023; 333:111660. [PMID: 37301129 PMCID: PMC10594643 DOI: 10.1016/j.pscychresns.2023.111660] [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] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Revised: 04/21/2023] [Accepted: 05/18/2023] [Indexed: 06/12/2023]
Abstract
BACKGROUND Anhedonia is hypothesized to be associated with blunted mesocorticolimbic dopamine (DA) functioning in samples with major depressive disorder. The purpose of this study was to examine linkages between striatal DA, reward circuitry functioning, anhedonia, and, in an exploratory fashion, self-reported stress, in a transdiagnostic anhedonic sample. METHODS Participants with (n = 25) and without (n = 12) clinically impairing anhedonia completed a reward-processing task during simultaneous positron emission tomography and magnetic resonance (PET-MR) imaging with [11C]raclopride, a DA D2/D3 receptor antagonist that selectively binds to striatal DA receptors. RESULTS Relative to controls, the anhedonia group exhibited decreased task-related DA release in the left putamen, caudate, and nucleus accumbens and right putamen and pallidum. There were no group differences in task-related brain activation (fMRI) during reward processing after correcting for multiple comparisons. General functional connectivity (GFC) findings revealed blunted fMRI connectivity between PET-derived striatal seeds and target regions in the anhedonia group. Associations were identified between anhedonia severity and the magnitude of task-related DA release to rewards in the left putamen, but not mesocorticolimbic GFC. CONCLUSIONS Results provide evidence for reduced striatal DA functioning during reward processing and blunted mesocorticolimbic network functional connectivity in a transdiagnostic sample with clinically significant anhedonia.
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Affiliation(s)
- Rachel D Phillips
- Department of Psychology and Neuroscience, University of North Carolina-Chapel Hill, Chapel Hill, NC, United States.
| | - Erin C Walsh
- Department of Psychiatry, University of North Carolina-Chapel Hill, Chapel Hill, NC, United States
| | - Nicole R Zürcher
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, United States
| | - David S Lalush
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, Raleigh, NC, United States
| | - Jessica L Kinard
- Carolina Institute for Developmental Disabilities, University of North Carolina at Chapel Hill School of Medicine, Chapel Hill, Chapel Hill, NC, United States
| | - Chieh-En Tseng
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, United States
| | - Paul M Cernasov
- Department of Psychology and Neuroscience, University of North Carolina-Chapel Hill, Chapel Hill, NC, United States
| | - Delia Kan
- Carolina Institute for Developmental Disabilities, University of North Carolina at Chapel Hill School of Medicine, Chapel Hill, Chapel Hill, NC, United States
| | - Kaitlin Cummings
- Department of Psychology and Neuroscience, University of North Carolina-Chapel Hill, Chapel Hill, NC, United States
| | - Lisalynn Kelley
- Department of Psychiatry & Behavioral Sciences, Duke University, Durham, NC, United States
| | - David Campbell
- Department of Psychiatry & Behavioral Sciences, Duke University, Durham, NC, United States
| | - Daniel G Dillon
- Center for Depression, Anxiety and Stress Research, McLean Hospital, Belmont, MA, United States
| | - Diego A Pizzagalli
- Center for Depression, Anxiety and Stress Research, McLean Hospital, Belmont, MA, United States
| | - David Izquierdo-Garcia
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, United States
| | - Jacob M Hooker
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, United States
| | - Moria J Smoski
- Department of Psychiatry & Behavioral Sciences, Duke University, Durham, NC, United States
| | - Gabriel S Dichter
- Department of Psychology and Neuroscience, University of North Carolina-Chapel Hill, Chapel Hill, NC, United States; Department of Psychiatry, University of North Carolina-Chapel Hill, Chapel Hill, NC, United States; Carolina Institute for Developmental Disabilities, University of North Carolina at Chapel Hill School of Medicine, Chapel Hill, Chapel Hill, NC, United States
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3
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Campos AI, Van Velzen LS, Veltman DJ, Pozzi E, Ambrogi S, Ballard ED, Banaj N, Başgöze Z, Bellow S, Benedetti F, Bollettini I, Brosch K, Canales-Rodríguez EJ, Clarke-Rubright EK, Colic L, Connolly CG, Courtet P, Cullen KR, Dannlowski U, Dauvermann MR, Davey CG, Deverdun J, Dohm K, Erwin-Grabner T, Goya-Maldonado R, Fani N, Fortea L, Fuentes-Claramonte P, Gonul AS, Gotlib IH, Grotegerd D, Harris MA, Harrison BJ, Haswell CC, Hawkins EL, Hill D, Hirano Y, Ho TC, Jollant F, Jovanovic T, Kircher T, Klimes-Dougan B, le Bars E, Lochner C, McIntosh AM, Meinert S, Mekawi Y, Melloni E, Mitchell P, Morey RA, Nakagawa A, Nenadić I, Olié E, Pereira F, Phillips RD, Piras F, Poletti S, Pomarol-Clotet E, Radua J, Ressler KJ, Roberts G, Rodriguez-Cano E, Sacchet MD, Salvador R, Sandu AL, Shimizu E, Singh A, Spalletta G, Steele JD, Stein DJ, Stein F, Stevens JS, Teresi GI, Uyar-Demir A, van der Wee NJ, van der Werff SJ, van Rooij SJ, Vecchio D, Verdolini N, Vieta E, Waiter GD, Whalley H, Whittle SL, Yang TT, Zarate CA, Thompson PM, Jahanshad N, van Harmelen AL, Blumberg HP, Schmaal L, Rentería ME. Concurrent validity and reliability of suicide risk assessment instruments: A meta-analysis of 20 instruments across 27 international cohorts. Neuropsychology 2023; 37:315-329. [PMID: 37011159 PMCID: PMC10132776 DOI: 10.1037/neu0000850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023] Open
Abstract
OBJECTIVE A major limitation of current suicide research is the lack of power to identify robust correlates of suicidal thoughts or behavior. Variation in suicide risk assessment instruments used across cohorts may represent a limitation to pooling data in international consortia. METHOD Here, we examine this issue through two approaches: (a) an extensive literature search on the reliability and concurrent validity of the most commonly used instruments and (b) by pooling data (N ∼ 6,000 participants) from cohorts from the Enhancing NeuroImaging Genetics Through Meta-Analysis (ENIGMA) Major Depressive Disorder and ENIGMA-Suicidal Thoughts and Behaviour working groups, to assess the concurrent validity of instruments currently used for assessing suicidal thoughts or behavior. RESULTS We observed moderate-to-high correlations between measures, consistent with the wide range (κ range: 0.15-0.97; r range: 0.21-0.94) reported in the literature. Two common multi-item instruments, the Columbia Suicide Severity Rating Scale and the Beck Scale for Suicidal Ideation were highly correlated with each other (r = 0.83). Sensitivity analyses identified sources of heterogeneity such as the time frame of the instrument and whether it relies on self-report or a clinical interview. Finally, construct-specific analyses suggest that suicide ideation items from common psychiatric questionnaires are most concordant with the suicide ideation construct of multi-item instruments. CONCLUSIONS Our findings suggest that multi-item instruments provide valuable information on different aspects of suicidal thoughts or behavior but share a modest core factor with single suicidal ideation items. Retrospective, multisite collaborations including distinct instruments should be feasible provided they harmonize across instruments or focus on specific constructs of suicidality. (PsycInfo Database Record (c) 2023 APA, all rights reserved).
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Affiliation(s)
- Adrian I. Campos
- Department of Genetics & Computational Biology, QIMR Berghofer Medical Research Institute, Brisbane, QLD, Australia
- School of Biomedical Sciences, Faculty of Medicine, The University of Queensland, Brisbane, QLD, Australia
| | - Laura S. Van Velzen
- Orygen, Parkville, VIC, Australia
- Centre for Youth Mental Health, University of Melbourne, Melbourne, VIC, Australia
| | - Dick J. Veltman
- Amsterdam UMC, Vrije Universiteit Amsterdam, Department of Psychiatry, Amsterdam Neuroscience, Amsterdam, The Netherlands
| | - Elena Pozzi
- Orygen, Parkville, VIC, Australia
- Centre for Youth Mental Health, University of Melbourne, Melbourne, VIC, Australia
| | - Sonia Ambrogi
- Laboratory of Neuropsychiatry, Department of Clinical and Behavioral Neurology, IRCCS Santa Lucia Foundation, Rome, Italy
| | - Elizabeth D. Ballard
- Experimental Therapeutics and Pathophysiology Branch, National Institute of Mental Health, Bethesda, MD, USA
| | - Nerisa Banaj
- Laboratory of Neuropsychiatry, Department of Clinical and Behavioral Neurology, IRCCS Santa Lucia Foundation, Rome, Italy
| | - Zeynep Başgöze
- Department of Psychiatry and Behavioral Sciences, University of Minnesota, Minneapolis, MN, USA
| | - Sophie Bellow
- Department of Psychiatry, University of Cambridge, Cambridge, UK
| | - Francesco Benedetti
- IRCCS San Raffaele Scientific Institute, Milan, Italy
- Università Vita-Salute San Raffaele, Milan, Italy
| | - Irene Bollettini
- IRCCS San Raffaele Scientific Institute, Milan, Italy
- Università Vita-Salute San Raffaele, Milan, Italy
| | - Katharina Brosch
- Department of Psychiatry and Psychotherapy and CMBB, University of Marburg, Marburg, Germany
| | - Erick J. Canales-Rodríguez
- FIDMAG Germanes Hospitalaries research Foundation, Barcelona, Spain
- CIBERSAM, Barcelona, Spain
- Signal Processing Laboratory (LTS5), EPFL, Lausanne, Switzerland
| | | | - Lejla Colic
- Department of Psychiatry and Psychotherapy, University Hospital Jena, Jena, Germany
- Department of Psychiatry, Yale School of Medicine, New Haven, CT, USA
- German Center for Mental Health, Halle-Jena-Magdeburg, Germany
| | - Colm G. Connolly
- Magnetic Resonance Imaging Facility and Department of Biomedical Sciences, Florida State University, Tallahassee, FL, USA
| | - Philippe Courtet
- Department of Emergency Psychiatry and Acute Care, Lapeyronie Hospital, CHU Montpellier, Montpellier, France
- IGF, University of Montpellier, CNRS, INSERM, Montpellier, France
| | - Kathryn R. Cullen
- Department of Psychiatry and Behavioral Sciences, University of Minnesota, Minneapolis, MN, USA
| | - Udo Dannlowski
- Institute for Translational Psychiatry, University of Münster, Münster, Germany
| | - Maria R. Dauvermann
- Department of Psychiatry, University of Cambridge, Cambridge, UK
- King’s College London, London, United Kingdom
| | - Christopher G. Davey
- Department of Psychiatry, The University of Melbourne & Melbourne Health, Melbourne, VIC, Australia
| | - Jeremy Deverdun
- Institut d'Imagerie Fonctionnelle Humaine, I2FH, Montpellier University Hospital Center, Gui de Chauliac Hospital, University of Montpellier, Montpellier, France
| | - Katharina Dohm
- Institute for Translational Psychiatry, University of Münster, Münster, Germany
| | - Tracy Erwin-Grabner
- Laboratory of Systems Neuroscience and Imaging in Psychiatry (SNIP-Lab), Department of Psychiatry and Psychotherapy, University Medical Center Goettingen (UMG), Georg-August University, Von-Siebold-Str. 5, 37075 Goettingen, Germany
| | - Roberto Goya-Maldonado
- Laboratory of Systems Neuroscience and Imaging in Psychiatry (SNIP-Lab), Department of Psychiatry and Psychotherapy, University Medical Center Goettingen (UMG), Georg-August University, Von-Siebold-Str. 5, 37075 Goettingen, Germany
| | - Negar Fani
- Department of Psychiatry and Behavioral Sciences, Emory University School of Medicine, Atlanta, GA, USA
| | - Lydia Fortea
- Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), CIBERSAM, Barcelona, Spain
- Institute of Neurosciences, University of Barcelona, Barcelona, Spain
| | | | - Ali Saffet Gonul
- SoCAT Lab, Department of Psychiatry, School of Medicine, Ege University, Izmir, Turkey
- Department of Neuroscience, Institute of Health Sciences, Ege University, Izmir, Turkey
- Department of Psychiatry and Behavioral Sciences, School of Medicine, Mercer University Macon, GA, USA
| | - Ian H. Gotlib
- Department of Psychology, Stanford University, Stanford, CA, USA
| | - Dominik Grotegerd
- Institute for Translational Psychiatry, University of Münster, Münster, Germany
| | - Mathew A. Harris
- Division of Psychiatry, Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK
| | - Ben J. Harrison
- Melbourne Neuropsychiatry Centre, Department of Psychiatry, The University of Melbourne, Melbourne, VIC, Australia
| | - Courtney C. Haswell
- Brain Imaging and Analysis Center, Duke University School of Medicine. Durham, NC, USA
| | - Emma L. Hawkins
- Division of Psychiatry, Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK
| | - Dawson Hill
- Department of Psychiatry and Behavioral Sciences, University of Minnesota, Minneapolis, MN, USA
| | - Yoshiyuki Hirano
- Research Center for Child Mental Development, Chiba University, Chiba, Japan
- United Graduate School of Child Development, Osaka University, Kanazawa University, Hamamatsu University School of Medicine, Chiba University and University of Fukui, Suita, Japan
| | - Tiffany C. Ho
- Department of Psychiatry and Behavioral Sciences, Division of Child and Adolescent Psychiatry, Weill Institute for Neurosciences, University of California, San Francisco (UCSF) School of Medicine, San Francisco, CA, USA
- Department of Psychology, Stanford University, Stanford, CA
- Department of Psychiatry and Behavioral Sciences and Weill Institute for Neurosciences, University of California, San Francisco, San Francisco, CA
| | - Fabrice Jollant
- Université de Paris, Paris, France
- GHU Paris Psychiatrie et Neurosciences, France
- McGill university, McGill Group for Suicide Studies, Montréal, Canada
- CHU Nîmes, department of psychiatrie, France
- Universitätsklinikum Jena, Germany
| | - Tanja Jovanovic
- Department of Psychiatry and Behavioral Neurosciences, Wayne State University School of Medicine, Detroit, MI, USA
| | - Tilo Kircher
- Department of Psychiatry and Psychotherapy and CMBB, University of Marburg, Marburg, Germany
| | | | - Emmanuelle le Bars
- Institut d'Imagerie Fonctionnelle Humaine, I2FH, Montpellier University Hospital Center, Gui de Chauliac Hospital, University of Montpellier, Montpellier, France
- Department of Neuroradiology, Montpellier University Hospital, Gui de Chauliac Hospital, Montpellier, France
| | - Christine Lochner
- SAMRC Unit on Risk & Resilience in Mental Disorders, Dept of Psychiatry, Stellenbosch University, South Africa
| | - Andrew M. McIntosh
- Division of Psychiatry, Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK
| | - Susanne Meinert
- Institute for Translational Psychiatry, University of Münster, Münster, Germany
| | - Yara Mekawi
- Department of Psychiatry and Behavioral Sciences, Emory University School of Medicine, Atlanta, GA, USA
| | - Elisa Melloni
- IRCCS San Raffaele Scientific Institute, Milan, Italy
- Università Vita-Salute San Raffaele, Milan, Italy
| | - Philip Mitchell
- School of Psychiatry, University of New South Wales, Sydney, NSW, Australia
| | - Rajendra A. Morey
- Brain Imaging and Analysis Center, Duke University School of Medicine. Durham, NC, USA
- Department of Psychiatry and Behavioral Sciences, Duke University School of Medicine. Durham, NC, USA
| | - Akiko Nakagawa
- Research Center for Child Mental Development, Chiba University, Chiba, Japan
- United Graduate School of Child Development, Osaka University, Kanazawa University, Hamamatsu University School of Medicine, Chiba University and University of Fukui, Suita, Japan
| | - Igor Nenadić
- Department of Psychiatry and Psychotherapy and CMBB, University of Marburg, Marburg, Germany
| | - Emilie Olié
- Department of Emergency Psychiatry and Acute Care, Lapeyronie Hospital, CHU Montpellier, Montpellier, France
- IGF, University of Montpellier, CNRS, INSERM, Montpellier, France
| | - Fabricio Pereira
- Departments of Radiology and Psychiatry, University Hospital Center of Nîmes, France
- MIPA, University of Nîmes, France
| | - Rachel D. Phillips
- Brain Imaging and Analysis Center, Duke University School of Medicine. Durham, NC, USA
| | - Fabrizio Piras
- Laboratory of Neuropsychiatry, Department of Clinical and Behavioral Neurology, IRCCS Santa Lucia Foundation, Rome, Italy
| | - Sara Poletti
- IRCCS San Raffaele Scientific Institute, Milan, Italy
- Università Vita-Salute San Raffaele, Milan, Italy
| | - Edith Pomarol-Clotet
- FIDMAG Germanes Hospitalaries research Foundation, Barcelona, Spain
- CIBERSAM, Barcelona, Spain
| | - Joaquim Radua
- Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), CIBERSAM, Barcelona, Spain
- Department of Psychosis Studies, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London, UK
- Centre for Psychiatric Research and Education, Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
| | - Kerry J. Ressler
- Department of Psychiatry and Behavioral Sciences, Emory University School of Medicine, Atlanta, GA, USA
- McLean Hospital, Harvard Medical School, Boston, MA, USA
| | - Gloria Roberts
- School of Psychiatry, University of New South Wales, Sydney, NSW, Australia
| | - Elena Rodriguez-Cano
- FIDMAG Germanes Hospitalaries research Foundation, Barcelona, Spain
- Benito Menni CASM, Sant Boi de Llobregat, Spain
| | - Matthew D. Sacchet
- Center for Depression, Anxiety, and Stress Research, McLean Hospital, Harvard Medical School, Belmont, MA, USA
| | - Raymond Salvador
- FIDMAG Germanes Hospitalaries research Foundation, Barcelona, Spain
- CIBERSAM, Barcelona, Spain
| | - Anca-Larisa Sandu
- Aberdeen Biomedical Imaging Centre, Institute of Medical Sciences, University of Aberdeen, Aberdeen, UK
| | - Eiji Shimizu
- Research Center for Child Mental Development, Chiba University, Chiba, Japan
- United Graduate School of Child Development, Osaka University, Kanazawa University, Hamamatsu University School of Medicine, Chiba University and University of Fukui, Suita, Japan
| | - Aditya Singh
- Laboratory of Systems Neuroscience and Imaging in Psychiatry (SNIP-Lab), Department of Psychiatry and Psychotherapy, University Medical Center Goettingen (UMG), Georg-August University, Von-Siebold-Str. 5, 37075 Goettingen, Germany
| | - Gianfranco Spalletta
- Laboratory of Neuropsychiatry, Department of Clinical and Behavioral Neurology, IRCCS Santa Lucia Foundation, Rome, Italy
- Division of Neuropsychiatry, Menninger Department of Psychiatry and Behavioral Sciences, Baylor College of Medicine, Houston, TX, U.S.A
| | - J. Douglas Steele
- Division of Imaging Science and Technology, Medical School, University of Dundee, Dundee, UK
| | - Dan J. Stein
- SAMRC Unit on Risk & Resilience in Mental Disorders, Dept of Psychiatry & Neuroscience Institute, University of Cape Town, Cape Town, South Africa
| | - Frederike Stein
- Department of Psychiatry and Psychotherapy and CMBB, University of Marburg, Marburg, Germany
| | - Jennifer S. Stevens
- Department of Psychiatry and Behavioral Sciences, Emory University School of Medicine, Atlanta, GA, USA
| | - Giana I. Teresi
- Department of Psychology, Stanford University, Stanford, CA, USA
- Department of Psychology, University of Pittsburgh, Pittsburgh, PA, USA
| | - Aslihan Uyar-Demir
- SoCAT Lab, Department of Psychiatry, School of Medicine, Ege University, Izmir, Turkey
| | - Nic J. van der Wee
- Department of Psychiatry, Leiden University Medical Center, Leiden, The Netherlands
- ResearchTheme Neuroscience and Leiden Institute for Brain and Cognition, Leiden University Medical Center, Leiden, The Netherlands
| | | | - Sanne J.H. van Rooij
- Department of Psychiatry and Behavioral Sciences, Emory University School of Medicine, Atlanta, GA, USA
| | - Daniela Vecchio
- Laboratory of Neuropsychiatry, Department of Clinical and Behavioral Neurology, IRCCS Santa Lucia Foundation, Rome, Italy
| | - Norma Verdolini
- Hospital Clinic, Institute of Neuroscience, University of Barcelona, IDIBAPS, CIBERSAM, Barcelona, Catalonia, Spain
| | - Eduard Vieta
- Hospital Clinic, Institute of Neuroscience, University of Barcelona, IDIBAPS, CIBERSAM, Barcelona, Catalonia, Spain
| | - Gordon D. Waiter
- Aberdeen Biomedical Imaging Centre, Institute of Medical Sciences, University of Aberdeen, Aberdeen, UK
| | - Heather Whalley
- Division of Psychiatry, Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK
| | - Sarah L. Whittle
- Melbourne Neuropsychiatry Centre, Department of Psychiatry, The University of Melbourne, Melbourne, VIC, Australia
| | - Tony T. Yang
- Department of Psychiatry and Behavioral Sciences, Division of Child and Adolescent Psychiatry, Weill Institute for Neurosciences, University of California, San Francisco (UCSF) School of Medicine, San Francisco, CA, USA
| | - Carlos A. Zarate
- Experimental Therapeutics and Pathophysiology Branch, National Institute of Mental Health, Bethesda, MD, USA
| | - Paul M. Thompson
- Imaging Genetics Center, Mark & Mary Stevens Neuroimaging & Informatics Institute, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Neda Jahanshad
- Imaging Genetics Center, Mark & Mary Stevens Neuroimaging & Informatics Institute, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Anne-Laura van Harmelen
- Department of Psychiatry, University of Cambridge, Cambridge, UK
- Social Security and Resilience Programme, Education and Child Studies, Leiden University, Leiden, the Netherlands
| | - Hilary P. Blumberg
- Department of Psychiatry, Yale School of Medicine, New Haven, CT, USA
- Department of Radiology and Biomedical Imaging, Yale School of Medicine
- Child Study Center, Yale School of Medicine
| | - Lianne Schmaal
- Orygen, Parkville, VIC, Australia
- Centre for Youth Mental Health, University of Melbourne, Melbourne, VIC, Australia
| | - Miguel E. Rentería
- Department of Genetics & Computational Biology, QIMR Berghofer Medical Research Institute, Brisbane, QLD, Australia
- School of Biomedical Sciences, Faculty of Medicine, The University of Queensland, Brisbane, QLD, Australia
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4
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Sun D, Adduru VR, Phillips RD, Bouchard HC, Sotiras A, Michael AM, Baker FC, Tapert SF, Brown SA, Clark DB, Goldston D, Nooner KB, Nagel BJ, Thompson WK, De Bellis MD, Morey RA. Adolescent alcohol use is linked to disruptions in age-appropriate cortical thinning: an unsupervised machine learning approach. Neuropsychopharmacology 2023; 48:317-326. [PMID: 36209230 PMCID: PMC9750971 DOI: 10.1038/s41386-022-01457-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Revised: 08/16/2022] [Accepted: 09/06/2022] [Indexed: 12/26/2022]
Abstract
Cortical thickness changes dramatically during development and is associated with adolescent drinking. However, previous findings have been inconsistent and limited by region-of-interest approaches that are underpowered because they do not conform to the underlying spatially heterogeneous effects of alcohol. In this study, adolescents (n = 657; 12-22 years at baseline) from the National Consortium on Alcohol and Neurodevelopment in Adolescence (NCANDA) study who endorsed little to no alcohol use at baseline were assessed with structural magnetic resonance imaging and followed longitudinally at four yearly intervals. Seven unique spatial patterns of covarying cortical thickness were obtained from the baseline scans by applying an unsupervised machine learning method called non-negative matrix factorization (NMF). The cortical thickness maps of all participants' longitudinal scans were projected onto vertex-level cortical patterns to obtain participant-specific coefficients for each pattern. Linear mixed-effects models were fit to each pattern to investigate longitudinal effects of alcohol consumption on cortical thickness. We found in six NMF-derived cortical thickness patterns, the longitudinal rate of decline in no/low drinkers was similar for all age cohorts. Among moderate drinkers the decline was faster in the younger adolescent cohort and slower in the older cohort. Among heavy drinkers the decline was fastest in the younger cohort and slowest in the older cohort. The findings suggested that unsupervised machine learning successfully delineated spatially coordinated patterns of vertex-level cortical thickness variation that are unconstrained by neuroanatomical features. Age-appropriate cortical thinning is more rapid in younger adolescent drinkers and slower in older adolescent drinkers, an effect that is strongest among heavy drinkers.
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Affiliation(s)
- Delin Sun
- Duke-UNC Brain Imaging and Analysis Center, Duke University, Durham, NC, USA
- VA Mid-Atlantic MIRECC, Durham VA Medical Center, Durham VA, Durham, NC, USA
- Department of Psychology, The Education University of Hong Kong, Hong Kong, China
| | - Viraj R Adduru
- Duke-UNC Brain Imaging and Analysis Center, Duke University, Durham, NC, USA
- VA Mid-Atlantic MIRECC, Durham VA Medical Center, Durham VA, Durham, NC, USA
- Chester F. Carlson Center for Imaging Sciences, Rochester Institute of Technology, Rochester, NY, USA
| | - Rachel D Phillips
- Duke-UNC Brain Imaging and Analysis Center, Duke University, Durham, NC, USA
- VA Mid-Atlantic MIRECC, Durham VA Medical Center, Durham VA, Durham, NC, USA
| | - Heather C Bouchard
- Duke-UNC Brain Imaging and Analysis Center, Duke University, Durham, NC, USA
- VA Mid-Atlantic MIRECC, Durham VA Medical Center, Durham VA, Durham, NC, USA
| | - Aristeidis Sotiras
- Department of Radiology and Institute for Informatics, University of Washington, St Louis, MO, USA
| | - Andrew M Michael
- Duke-UNC Brain Imaging and Analysis Center, Duke University, Durham, NC, USA
- Chester F. Carlson Center for Imaging Sciences, Rochester Institute of Technology, Rochester, NY, USA
| | - Fiona C Baker
- Biosciences Division, SRI International, Menlo Park, CA, USA
| | - Susan F Tapert
- Department of Psychiatry, University of California San Diego, La Jolla, CA, USA
| | - Sandra A Brown
- Department of Psychiatry, University of California San Diego, La Jolla, CA, USA
| | - Duncan B Clark
- Department of Psychiatry, University of Pittsburgh, Pittsburgh, PA, USA
| | - David Goldston
- Department of Psychology, University of North Carolina Wilmington, Wilmington, NC, USA
| | - Kate B Nooner
- Department of Psychology, University of North Carolina Wilmington, Wilmington, NC, USA
| | - Bonnie J Nagel
- Departments of Psychiatry and Behavioral Neuroscience, Oregon Health & Science University, Portland, OR, USA
| | - Wesley K Thompson
- Department of Psychiatry, University of California San Diego, La Jolla, CA, USA
| | - Michael D De Bellis
- Duke-UNC Brain Imaging and Analysis Center, Duke University, Durham, NC, USA
- Department of Psychiatry and Behavioral Sciences, Duke University, Durham, NC, USA
| | - Rajendra A Morey
- Duke-UNC Brain Imaging and Analysis Center, Duke University, Durham, NC, USA.
- VA Mid-Atlantic MIRECC, Durham VA Medical Center, Durham VA, Durham, NC, USA.
- Department of Psychiatry and Behavioral Sciences, Duke University, Durham, NC, USA.
- Center for Cognitive Neuroscience, Duke University, Durham, NC, USA.
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5
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Phillips RD, Bohman B, Peakall R. Pollination by nectar-foraging pompilid wasps: a new specialized pollination strategy for the Australian flora. Plant Biol (Stuttg) 2021; 23:702-710. [PMID: 33998761 DOI: 10.1111/plb.13286] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2020] [Accepted: 04/15/2021] [Indexed: 06/12/2023]
Abstract
The Pompilidae is a cosmopolitan and diverse group of wasps, which commonly feed on nectar. However, pollination systems specialized on pompilids have not been documented in detail outside of southern Africa. Here, we studied Caladenia drummondii (Orchidaceae) where, based on floral traits and preliminary field observations, we predicted pollination by sexual deception of male pompilid wasps. Detailed pollinator observations were undertaken using floral baiting experiments at sites spanning 375 km. Following evidence for nectar on some flowers of C. drummondii, the sugar content on the labellum was analysed by GC-MS. Floral spectral reflectance was measured and compared with Caladenia using other pollination strategies. Males of a single species of pompilid wasp (Calopompilus sp.) were the only visitors capable of pollinating C. drummondii. Attempts to feed from the surface of the labellum were frequent and were associated with removal and deposition of pollinia. GC-MS analysis revealed larger quantities of sugar on the labellum than reported in other Caladenia species. While no sexual or courtship behaviour was observed, the zig-zag and circling flight on approach to the flower is suggestive of odour-based attraction. Floral spectral reflectance was similar to sexually deceptive Caladenia. This study represents the first confirmation of a specialized pompilid pollination system outside of Africa. Although pollination occurs during nectar-foraging, long-distance sexual attraction cannot be ruled out as an explanation for the exclusive male visitation. The similarity in floral spectral reflectance to other Caladenia indicates colour may not impose a constraint on the evolution of pollination by pompilids.
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Affiliation(s)
- R D Phillips
- Department of Ecology, Environment & Evolution, La Trobe University, Bundoora, VIC, Australia
- Department of Biodiversity Conservation and Attractions, Kings Park Science, Kings Park, WA, Australia
- Ecology and Evolution, Research School of Biology, The Australian National University, Canberra, ACT, Australia
| | - B Bohman
- Department of Plant Protection Biology, Swedish University of Agricultural Science, Alnarp, Sweden
- School of Molecular Sciences, The University of Western Australia, Crawley, WA, Australia
| | - R Peakall
- Ecology and Evolution, Research School of Biology, The Australian National University, Canberra, ACT, Australia
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6
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Zürcher NR, Walsh EC, Phillips RD, Cernasov PM, Tseng CEJ, Dharanikota A, Smith E, Li Z, Kinard JL, Bizzell JC, Greene RK, Dillon D, Pizzagalli DA, Izquierdo-Garcia D, Truong K, Lalush D, Hooker JM, Dichter GS. A simultaneous [ 11C]raclopride positron emission tomography and functional magnetic resonance imaging investigation of striatal dopamine binding in autism. Transl Psychiatry 2021; 11:33. [PMID: 33431841 PMCID: PMC7801430 DOI: 10.1038/s41398-020-01170-0] [Citation(s) in RCA: 27] [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] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/14/2020] [Revised: 11/30/2020] [Accepted: 12/07/2020] [Indexed: 01/10/2023] Open
Abstract
The social motivation hypothesis of autism posits that autism spectrum disorder (ASD) is characterized by impaired motivation to seek out social experience early in life that interferes with the development of social functioning. This framework suggests that impaired mesolimbic dopamine function underlies compromised responses to social rewards in ASD. Although this hypothesis is supported by functional magnetic resonance imaging (fMRI) studies, no molecular imaging study has evaluated striatal dopamine functioning in response to rewards in ASD. Here, we examined striatal functioning during monetary incentive processing in ASD and controls using simultaneous positron emission tomography (PET) and fMRI. Using a bolus + infusion protocol with the D2/D3 dopamine receptor antagonist [11C]raclopride, voxel-wise binding potential (BPND) was compared between groups (controls = 12, ASD = 10) in the striatum. Striatal clusters showing significant between-group BPND differences were used as seeds in whole-brain fMRI general functional connectivity analyses. Relative to controls, the ASD group demonstrated decreased phasic dopamine release to incentives in the bilateral putamen and left caudate, as well as increased functional connectivity between a PET-derived right putamen seed and the precuneus and insula. Within the ASD group, decreased phasic dopamine release in the putamen was related to poorer theory-of-mind skills. Our findings that ASD is characterized by impaired striatal phasic dopamine release to incentives provide support for the social motivation hypothesis of autism. PET-fMRI may be a suitable tool to evaluate novel ASD therapeutics targeting the striatal dopamine system.
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Affiliation(s)
- Nicole R. Zürcher
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129 USA
| | - Erin C. Walsh
- grid.10698.360000000122483208Department of Psychiatry, University of North Carolina-Chapel Hill, Chapel Hill, NC 27514 USA
| | - Rachel D. Phillips
- grid.10698.360000000122483208Department of Psychology and Neuroscience, University of North Carolina-Chapel Hill, Chapel Hill, NC 27514 USA
| | - Paul M. Cernasov
- grid.10698.360000000122483208Department of Psychology and Neuroscience, University of North Carolina-Chapel Hill, Chapel Hill, NC 27514 USA
| | - Chieh-En J. Tseng
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129 USA
| | - Ayarah Dharanikota
- grid.10698.360000000122483208Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, Raleigh, NC USA
| | - Eric Smith
- grid.10698.360000000122483208UNC-Chapel Hill Department of Radiology and Biomedical Research Imaging Center (BRIC), Chapel Hill, NC 27514 USA
| | - Zibo Li
- grid.10698.360000000122483208UNC-Chapel Hill Department of Radiology and Biomedical Research Imaging Center (BRIC), Chapel Hill, NC 27514 USA
| | - Jessica L. Kinard
- grid.10698.360000000122483208Carolina Institute for Developmental Disabilities, University of North Carolina at Chapel Hill School of Medicine, Chapel Hill, Chapel Hill, NC 27510 USA
| | - Joshua C. Bizzell
- grid.10698.360000000122483208Department of Psychiatry, University of North Carolina-Chapel Hill, Chapel Hill, NC 27514 USA
| | - Rachel K. Greene
- grid.10698.360000000122483208Department of Psychology and Neuroscience, University of North Carolina-Chapel Hill, Chapel Hill, NC 27514 USA
| | - Daniel Dillon
- grid.240206.20000 0000 8795 072XCenter for Depression, Anxiety and Stress Research, McLean Hospital, Belmont, MA USA
| | - Diego A. Pizzagalli
- grid.240206.20000 0000 8795 072XCenter for Depression, Anxiety and Stress Research, McLean Hospital, Belmont, MA USA
| | - David Izquierdo-Garcia
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129 USA
| | - Kinh Truong
- grid.10698.360000000122483208Department of Biostatistics, University of North Carolina-Chapel Hill, Chapel Hill, NC 27514 USA
| | - David Lalush
- grid.10698.360000000122483208Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, Raleigh, NC USA
| | - Jacob M. Hooker
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129 USA
| | - Gabriel S. Dichter
- grid.10698.360000000122483208Department of Psychiatry, University of North Carolina-Chapel Hill, Chapel Hill, NC 27514 USA ,grid.10698.360000000122483208Department of Psychology and Neuroscience, University of North Carolina-Chapel Hill, Chapel Hill, NC 27514 USA ,grid.10698.360000000122483208Carolina Institute for Developmental Disabilities, University of North Carolina at Chapel Hill School of Medicine, Chapel Hill, Chapel Hill, NC 27510 USA
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Phillips RD, Bohman B, Brown GR, Tomlinson S, Peakall R. A specialised pollination system using nectar-seeking thynnine wasps in Caladenia nobilis (Orchidaceae). Plant Biol (Stuttg) 2020; 22:157-166. [PMID: 31705712 DOI: 10.1111/plb.13069] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2019] [Accepted: 10/01/2019] [Indexed: 05/26/2023]
Abstract
Caladenia is a diverse Australian genus that is exceptional among orchids in having both species pollinated by food-seeking and sexually deceived insects. Here, we investigated the pollination of Caladenia nobilis, a species predicted to be food-deceptive due to its large, cream-coloured and apparently nectarless flowers. Pollinator observations were made using experimental clumps of flowers. Measurements of floral colour were undertaken with a spectrometer, nectar was tested using GC-MS, and reproductive success was quantified for 2 years. While C. nobilis attracted nine species of insect, only males of the thynnine wasp Rhagigaster discrepans exhibited the correct size and behaviour to remove and deposit pollen. Male R. discrepans attempted to feed from the surface of the labellum, often crawling to multiple flowers, but showed no evidence of sexual attraction. Most flowers produced little or no nectar, although some may provide enough sucrose to act as a meagre reward to pollinators. Floral colouration was similar to a related Caladenia species pollinated by sexual deception, although the sexually deceptive species had a dull-red labellum. Reproductive success was generally low and highly variable between sites and years. In addition to most visitors being of inappropriate size for pollinia removal, the lack of response to the orchid by several co-occurring species of thynnine wasp suggests filtering of potential pollinators at the attraction phase. Our discovery of a pollination strategy that may be intermediate between food deception and food reward raises the question, how many putatively rewardless orchids actually produce meagre amounts of nectar?
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Affiliation(s)
- R D Phillips
- Department of Ecology, Environment and Evolution, La Trobe University, Melbourne, VIC, Australia
- Kings Park Science, Department of Biodiversity Conservation and Attractions, Kings Park, Perth, WA, Australia
- Ecology and Evolution, Research School of Biology, The Australian National University, Canberra, ACT, Australia
| | - B Bohman
- School of Molecular Sciences, The University of Western Australia, Crawley, WA, Australia
| | - G R Brown
- Museum and Art Gallery of the Northern Territory, Darwin, NT, Australia
- CSIRO Land and Water, Winnellie, NT, Australia
- Research Institute for Environment and Livelihoods, Charles Darwin University, Darwin, NT, Australia
| | - S Tomlinson
- Kings Park Science, Department of Biodiversity Conservation and Attractions, Kings Park, Perth, WA, Australia
- School of Molecular & Life Sciences, Curtin University Bentley, Perth, Western Australia, Australia
| | - R Peakall
- Ecology and Evolution, Research School of Biology, The Australian National University, Canberra, ACT, Australia
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8
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Clausen AN, Clarke E, Phillips RD, Haswell C, Morey RA. Combat exposure, posttraumatic stress disorder, and head injuries differentially relate to alterations in cortical thickness in military Veterans. Neuropsychopharmacology 2020; 45:491-498. [PMID: 31600766 PMCID: PMC6969074 DOI: 10.1038/s41386-019-0539-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [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: 05/20/2019] [Revised: 09/23/2019] [Accepted: 10/01/2019] [Indexed: 12/30/2022]
Abstract
Combat-exposed Veterans are at increased risk for developing psychological distress, mood disorders, and trauma and stressor-related disorders. Trauma and mood disorders have been linked to alterations in brain volume, function, and connectivity. However, far less is known about the effects of combat exposure on brain health. The present study examined the relationship between severity of combat exposure and cortical thickness. Post-9/11 Veterans (N = 337; 80% male) were assessed with structural neuroimaging and clinically for combat exposure, depressive symptoms, prior head injury, and posttraumatic stress disorder (PTSD). Vertex-wide cortical thickness was estimated using FreeSurfer autosegmentation. FreeSurfer's Qdec was used to examine relationship between combat exposure, PTSD, and prior head injuries on cortical thickness (Monte Carlo corrected for multiple comparisons, vertex-wise cluster threshold of 1.3, p < 0.01). Covariates included age, sex, education, depressive symptoms, nonmilitary trauma, alcohol use, and prior head injury. Higher combat exposure uniquely related to lower cortical thickness in the left prefrontal lobe and increased cortical thickness in the left middle and inferior temporal lobe; whereas PTSD negatively related to cortical thickness in the right fusiform. Head injuries related to increased cortical thickness in the bilateral medial prefrontal cortex. Combat exposure uniquely contributes to lower cortical thickness in regions implicated in executive functioning, attention, and memory after accounting for the effects of PTSD and prior head injury. Our results highlight the importance of examining effects of stress and trauma exposure on neural health in addition to the circumscribed effects of specific syndromal pathology.
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Affiliation(s)
- Ashley N. Clausen
- VA Mid-Atlantic MIRECC, Durham VAHCS, 508 Fulton St, Durham, NC 27705 USA ,0000 0004 1936 7961grid.26009.3dDuke-UNC Brain Imaging and Analysis Center, Duke University, Durham, NC USA
| | - Emily Clarke
- VA Mid-Atlantic MIRECC, Durham VAHCS, 508 Fulton St, Durham, NC 27705 USA ,0000 0004 1936 7961grid.26009.3dDuke-UNC Brain Imaging and Analysis Center, Duke University, Durham, NC USA
| | - Rachel D. Phillips
- VA Mid-Atlantic MIRECC, Durham VAHCS, 508 Fulton St, Durham, NC 27705 USA ,0000 0004 1936 7961grid.26009.3dDuke-UNC Brain Imaging and Analysis Center, Duke University, Durham, NC USA
| | - Courtney Haswell
- VA Mid-Atlantic MIRECC, Durham VAHCS, 508 Fulton St, Durham, NC 27705 USA ,0000 0004 1936 7961grid.26009.3dDuke-UNC Brain Imaging and Analysis Center, Duke University, Durham, NC USA
| | | | - Rajendra A. Morey
- VA Mid-Atlantic MIRECC, Durham VAHCS, 508 Fulton St, Durham, NC 27705 USA ,0000 0004 1936 7961grid.26009.3dDuke-UNC Brain Imaging and Analysis Center, Duke University, Durham, NC USA ,0000 0004 1936 7961grid.26009.3dCenter for Cognitive Neuroscience, Duke University, Durham, NC USA ,0000 0004 1936 7961grid.26009.3dDepartment of Psychiatry and Behavioral Sciences, Duke University, Durham, NC USA
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Sun D, Phillips RD, Mulready HL, Zablonski ST, Turner JA, Turner MD, McClymond K, Nieuwsma JA, Morey RA. Resting-state brain fluctuation and functional connectivity dissociate moral injury from posttraumatic stress disorder. Depress Anxiety 2019; 36:442-452. [PMID: 30690812 PMCID: PMC6488394 DOI: 10.1002/da.22883] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [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: 07/02/2018] [Revised: 01/07/2019] [Accepted: 01/12/2019] [Indexed: 02/04/2023] Open
Abstract
Moral injury is closely associated with posttraumatic stress disorder (PTSD) and characterized by disturbances in social and moral cognition. Little is known about the neural underpinnings of moral injury, and whether the neural correlates are different between moral injury and PTSD. A sample of 26 U.S. military veterans (two females: 28-55 years old) were investigated to determine how subjective appraisals of morally injurious events measured by Moral Injury Event Scale (MIES) and PTSD symptoms are differentially related to spontaneous fluctuations indexed by amplitude of low frequency fluctuation (ALFF) as well as functional connectivity during resting-state functional magnetic resonance imaging scanning. ALFF in the left inferior parietal lobule (L-IPL) was positively associated with MIES subscores of transgressions, negatively associated with subscores of betrayals, and not related with PTSD symptoms. Moreover, functional connectivity between the L-IPL and bilateral precuneus was positively related with PTSD symptoms and negatively related with MIES total scores. Our results provide the first evidence that morally injurious events and PTSD symptoms have dissociable neural underpinnings, and behaviorally distinct subcomponents of morally injurious events are different in neural responses. The findings increase our knowledge of the neural distinctions between moral injury and PTSD and may contribute to developing nosology and interventions for military veterans afflicted by moral injury.
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Affiliation(s)
- Delin Sun
- Duke-UNC Brain Imaging and Analysis Center, Duke University, Durham, North Carolina,VA Mid-Atlantic Mental Illness Research, Education and Clinical Center (MIRECC), Durham, North Carolina
| | - Rachel D. Phillips
- Duke-UNC Brain Imaging and Analysis Center, Duke University, Durham, North Carolina,VA Mid-Atlantic Mental Illness Research, Education and Clinical Center (MIRECC), Durham, North Carolina
| | - Hannah L. Mulready
- VA Mid-Atlantic Mental Illness Research, Education and Clinical Center (MIRECC), Durham, North Carolina
| | - Stephen T. Zablonski
- VA Mid-Atlantic Mental Illness Research, Education and Clinical Center (MIRECC), Durham, North Carolina
| | - Jessica A. Turner
- Department of Psychology, Georgia State University, Atlanta, Georgia
| | - Matthew D. Turner
- Department of Psychology, Georgia State University, Atlanta, Georgia
| | - Kathryn McClymond
- Department of Religious Studies, Georgia State University, Atlanta, Georgia
| | - Jason A. Nieuwsma
- VA Mid-Atlantic Mental Illness Research, Education and Clinical Center (MIRECC), Durham, North Carolina,Department of Psychiatry & Behavioral Sciences, School of Medicine, Duke University, Durham, North Carolina
| | - Rajendra A. Morey
- Duke-UNC Brain Imaging and Analysis Center, Duke University, Durham, North Carolina,VA Mid-Atlantic Mental Illness Research, Education and Clinical Center (MIRECC), Durham, North Carolina,Department of Psychiatry & Behavioral Sciences, School of Medicine, Duke University, Durham, North Carolina
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10
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Phillips RD, Wilson SM, Sun D, Morey R. Posttraumatic Stress Disorder Symptom Network Analysis in U.S. Military Veterans: Examining the Impact of Combat Exposure. Front Psychiatry 2018; 9:608. [PMID: 30519198 PMCID: PMC6259007 DOI: 10.3389/fpsyt.2018.00608] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Accepted: 10/30/2018] [Indexed: 01/18/2023] Open
Abstract
Recent work inspired by graph theory has begun to conceptualize mental disorders as networks of interacting symptoms. Posttraumatic stress disorder (PTSD) symptom networks have been investigated in clinical samples meeting full diagnostic criteria, including military veterans, natural disaster survivors, civilian survivors of war, and child sexual abuse survivors. Despite reliable associations across reported networks, more work is needed to compare central symptoms across trauma types. Additionally, individuals without a diagnosis who still experience symptoms, also referred to as subthreshold cases, have not been explored with network analysis in veterans. A sample of 1,050 Iraq/Afghanistan-era U.S. military veterans (851 males, mean age = 36.3, SD = 9.53) meeting current full-criteria PTSD (n = 912) and subthreshold PTSD (n = 138) were assessed with the Structured Clinical Interview for DSM-IV Disorders (SCID). Combat Exposure Scale (CES) scores were used to group the sample meeting full-criteria into high (n = 639) and low (n = 273) combat exposure subgroups. Networks were estimated using regularized partial correlation models in the R-package qgraph, and robustness tests were performed with bootnet. Frequently co-occurring symptom pairs (strong network connections) emerged between two avoidance symptoms, hypervigilance and startle response, loss of interest and detachment, as well as, detachment and restricted affect. These associations replicate findings reported across PTSD trauma types. A symptom network analysis of PTSD in a veteran population found significantly greater overall connectivity in the full-criteria PTSD group as compared to the subthreshold PTSD group. Additionally, novel findings indicate that the association between intrusive thoughts and irritability is a feature of the symptom network of veterans with high levels of combat exposure. Mean node predictability is high for PTSD symptom networks, averaging 51.5% shared variance. With the tools described here and by others, researchers can help refine diagnostic criteria for PTSD, develop more accurate measures for assessing PTSD, and eventually inform therapies that target symptoms with strong network connections to interrupt interconnected symptom complexes and promote functional recovery.
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Affiliation(s)
- Rachel D. Phillips
- Duke-UNC Brain Imaging and Analysis Center, Duke University, Durham, NC, United States
- Mental Illness Research, Education and Clinical Centers MIRECC (VA), Durham VA Medical Center, Durham, NC, United States
| | - Sarah M. Wilson
- Center for Health Services Research in Primary Care, Durham VA Medical Center, Durham, NC, United States
- Department of Psychiatry and Behavioral Sciences, School of Medicine, Duke University, Durham, NC, United States
| | - Delin Sun
- Duke-UNC Brain Imaging and Analysis Center, Duke University, Durham, NC, United States
- Mental Illness Research, Education and Clinical Centers MIRECC (VA), Durham VA Medical Center, Durham, NC, United States
| | - Rajendra Morey
- Duke-UNC Brain Imaging and Analysis Center, Duke University, Durham, NC, United States
- Mental Illness Research, Education and Clinical Centers MIRECC (VA), Durham VA Medical Center, Durham, NC, United States
- Department of Psychiatry and Behavioral Sciences, School of Medicine, Duke University, Durham, NC, United States
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Phillips RD, Bohman B, Anthony JM, Krauss SL, Dixon KW, Peakall R. Mismatch in the distribution of floral ecotypes and pollinators: insights into the evolution of sexually deceptive orchids. J Evol Biol 2015; 28:601-12. [PMID: 25619237 DOI: 10.1111/jeb.12593] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [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: 05/15/2014] [Revised: 12/09/2014] [Accepted: 01/20/2015] [Indexed: 01/01/2023]
Abstract
Plants are predicted to show floral adaptation to geographic variation in the most effective pollinator, potentially leading to reproductive isolation and genetic divergence. Many sexually deceptive orchids attract just a single pollinator species, limiting opportunities to experimentally investigate pollinator switching. Here, we investigate Drakaea concolor, which attracts two pollinator species. Using pollinator choice tests, we detected two morphologically similar ecotypes within D. concolor. The common ecotype only attracted Zaspilothynnus gilesi, whereas the rare ecotype also attracted an undescribed species of Pogonothynnus. The rare ecotype occurred at populations nested within the distribution of the common ecotype, with no evidence of ecotypes occurring sympatrically. Surveying for pollinators at over 100 sites revealed that ecotype identity was not correlated with wasp availability, with most orchid populations only attracting the rare Z. gilesi. Using microsatellite markers, genetic differentiation among populations was very low (GST = 0.011) regardless of ecotype, suggestive of frequent gene flow. Taken together, these results may indicate that the ability to attract Pogonothynnus has evolved recently, but this ecotype is yet to spread. The nested distribution of ecotypes, rather than the more typical formation of ecotypes in allopatry, illustrates that in sexually deceptive orchids, pollinator switching could occur throughout a species' range, resulting from multiple potentially suitable but unexploited pollinators occurring in sympatry. This unusual case of sympatric pollinators highlights D. concolor as a promising study system for further understanding the process of pollinator switching from ecological, chemical and genetic perspectives.
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Affiliation(s)
- R D Phillips
- Evolution, Ecology and Genetics, Research School of Biology, The Australian National University, Canberra, ACT, 0200, Australia; Kings Park and Botanic Garden, The Botanic Garden and Parks Authority, West Perth, 6005, Western Australia, Australia; School of Plant Biology, The University of Western Australia, Nedlands, 6009, Western Australia, Australia
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Phillips RD, Storey AW, Johnson MS. Genetic structure of Melanotaenia australis at local and regional scales in the east Kimberley, Western Australia. J Fish Biol 2009; 74:437-451. [PMID: 20735569 DOI: 10.1111/j.1095-8649.2008.02099.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The Kimberley region of Western Australia possesses a poorly studied freshwater fish fauna with high endemism in an aquatic landscape subject to monsoonal floods and dry season isolation. In the first population genetic study of freshwater fish in this region, the authors tested the effects of geographic barriers on genetic structure at multiple spatial scales in east Kimberley populations of the western rainbowfish, Melanotaenia australis, the most widespread and abundant species in the region. Based on allozyme comparisons, hierarchical analysis of F(ST) revealed increasing genetic subdivision with spatial scale. Minimal genetic structure within creeklines demonstrated that wet season dispersal, rather than dry season isolation, determines genetic structure at small scales. At the scale of sub-catchments, a pattern of isolation by distance along creeklines was evident. Genetic subdivision between adjacent river systems was greater between rivers separated by a plateau than by lowlands. This implies greater connectivity of populations in lowland areas and may explain the greater similarity of the east Kimberly freshwater fish fauna with lowlands to the east than with the more rugged regions to the west. Similarly, greater connectivity between lowland populations may account for the on-average larger distribution of lowland Melanotaeniids.
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Affiliation(s)
- R D Phillips
- School of Animal Biology, University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia.
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Abstract
Partially defatted peanut flour was processed in a twin-screw extruder. Resulting extrudates were dried, ground, and incubated with simulated gastric fluid for various time periods. Soluble protein content of the resulting digesta was measured after 10% trichloroacetic acid treatment to evaluate the digestibility. In vitro digestion using pepsin increased the solubility of peanut protein in 10% trichloroacetic acid solution from 2 to 6% to 65 to 75%. Four strong IgE-binding subunits (65, 22, 17, and 14 kDa) were found with immunoblotting in peanut proteins extracted from unextruded peanut flour; no IgE-binding bands were observed in extrudates. The 65-kDa (putative Ara h 1) subunit was insolubilized during extrusion, and its IgE-binding property was susceptible to in vitro digestion. Following extrusion cooking, no IgE-binding bands were detected by immunoblotting, including the strongly IgE-binding 14-kDa fraction, a strong IgE-binding band from native peanut protein that is stable in pepsin. The 22- and 17-kDa (putative Ara h 2) subunits retained a small amount of IgE-binding potential and became susceptible to pepsin hydrolysis after extrusion.
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Affiliation(s)
- L Chen
- Department of Food Science and Technology, University of Georgia, Griffin, Georgia 30223, USA
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Chiou RYY, Phillips RD, Zhao P, Doyle MP, Beuchat LR. Ethanol-mediated variations in cellular fatty acid composition and protein profiles of two genotypically different strains of Escherichia coli O157:H7. Appl Environ Microbiol 2004; 70:2204-10. [PMID: 15066814 PMCID: PMC383136 DOI: 10.1128/aem.70.4.2204-2210.2004] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.1] [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: 11/20/2022] Open
Abstract
Two strains of Escherichia coli O157:H7 were grown in tryptic soy broth (TSB, pH 7.1) supplemented with 0, 2.5, 5.0, 7.5, and 10% ethanol at 30 degrees C for up to 54 h. Growth rates in TSB supplemented with 0, 2.5, and 5.0% ethanol decreased with an increase in ethanol concentration. Growth was not observed in TSB supplemented with 7.5 or 10% ethanol. The pH of TSB containing 5.0% ethanol decreased to 5.8 within 12 h and then increased to 7.0 at 54 h. The ethanol content in TSB supplemented with 2.5 or 5.0% ethanol did not change substantially during the first 36 h of incubation but decreased slightly thereafter, indicating utilization or degradation of ethanol by both strains. Glucose was depleted in TSB supplemented with 0, 2.5, or 5.0% ethanol within 12 h. Cells grown under ethanol stress contained a higher amount of fatty acids. With the exceptions of cis-oleic acid and nonadecanoic acid, larger amounts of fatty acid were present in stationary-phase cells of the two strains grown in TSB supplemented with 5.0% ethanol for 30 h than in cells grown in TSB without ethanol for 22 h. The trans-oleic acid content was 10-fold higher in the cells grown in TSB with 5.0% ethanol than those grown in TSB without ethanol. In contrast, cis-oleic acid was not detected in ethanol-stressed cells but was present at concentrations of 0.32 and 0.36 mg/g of cells of the two strains grown in TSB without ethanol. Protein content was higher in ethanol-stressed cells than in nonstressed cells. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis protein profiles varied qualitatively as affected by the strain and the presence of ethanol in TSB. An ethanol-mediated protein (28 kDa) was observed in the ethanol-stressed cells but not in control cells. It is concluded that the two test strains of E. coli O157:H7 underwent phenotypic modifications in cellular fatty acid composition and protein profiles in response to ethanol stress. The potential for cross protection against subsequent stresses applied in food preservation technologies as a result of these changes is under investigation.
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Affiliation(s)
- R Y-Y Chiou
- Graduate Institute of Biotechnology, National Chiayi University, Chiayi, Taiwan
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15
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Culhane JL, Herring J, Sanford PW, O'Shea G, Phillips RD. Advances in the design and performance of X-ray proportional counters. ACTA ACUST UNITED AC 2002. [DOI: 10.1088/0950-7671/43/12/307] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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16
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Henry MH, Pesti GM, Bakalli R, Lee J, Toledo RT, Eitenmiller RR, Phillips RD. The performance of broiler chicks fed diets containing extruded cottonseed meal supplemented with lysine. Poult Sci 2001; 80:762-8. [PMID: 11441843 DOI: 10.1093/ps/80.6.762] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.7] [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: 11/14/2022] Open
Abstract
Three experiments were conducted to test the hypothesis that extruding cottonseed meal (CSM) with supplemental lysine improves its feeding value by detoxifying gossypol. The performance of 1-wk-old straight-run Peterson x Arbor Acres broiler chicks fed diets containing 20% feed-grade or extruded CSM was compared with that of control chicks fed corn and soybean meal-based broiler rations. All diets were formulated to meet minimum NRC requirements. Lysine levels were adjusted by addition of synthetic lysine at rates of 0.5 to 2.0% of the protein in CSM. In all experiments, weight gain, feed intake, and feed conversion ratio (FCR) of broilers at 21 d were significantly affected by the diets. Feeding feed-grade and extruded CSM resulted in decreased body weight gain, increased feed intake, and inefficient feed utilization. When 2% lysine was added to feed-grade or extruded CSM, the body weight gains of chicks were not significantly different from those fed the control diet. The FCR of chicks fed feed-grade and extruded CSM plus 2% lysine at 21 d was significantly better than that of chicks fed feed-grade or extruded CSM alone. Abdominal fat pads (as a percentage of body weight) were significantly increased by the inclusion of CSM with or without the addition of lysine (P < or = 0.019). Liver, spleen, and heart weights were not affected by the presence of 20% CSM in the diet. The effects of CSM on plasma iron level was not consistent. Only in Experiment 1 did CSM cause a significant reduction in plasma iron. The hemoglobin contents and hematocrit values of blood from chicks fed diets with 20% CSM were not significantly different from those of the controls. The extrusion process reduced the free gossypol in CSM, but the total gossypol level was not changed, and chick performance was not improved. However, this study shows that, with adequate supplemental lysine, CSM can be used in broiler diets without a reduction in performance.
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Affiliation(s)
- M H Henry
- Department of Poultry Science, University of Georgia, Athens 30602, USA
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17
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Mensa-Wilmot Y, Phillips RD, Sefa-Dedeh S. Acceptability of extrusion cooked cereal/legume weaning food supplements to Ghanaian mothers. Int J Food Sci Nutr 2001; 52:83-90. [PMID: 11225182] [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: 02/19/2023]
Abstract
Six cereal/legume mixtures were developed with the aid of computer-assisted optimization software from cereal and legume staples indigenous to the West African sub-region. The mixtures had 45-50% maize, 35-40% decorticated cowpeas and either blanched peanuts or decorticated soybeans as a source of lipid and complementary amino acids. Three processing schemes involving roasting, amylase digestion and extrusion cooking were employed. The proportion of ingredients in each cereal/legume blend was based on meeting the nutrient requirement of the 0.5-0.9-year-old infant and cost considerations. Nutrient composition of the blends (proximate, amino acid, mineral and vitamin composition) indicated that these formulations were adequate nutritionally as weaning supplements (Mensa-Wilmot et al, 2000a,2000b). These formulations were evaluated by mothers of weanling children based on their preferences with respect to color, flavor, texture and willingness to purchase the product assessed. A total of 133 one-on-one interviews and 23 group discussions were conducted (involving 6-12 respondents) with selected Ghanaian women. The mothers found the convenience of a weaning food made from local staples that could be processed on village/market scale very attractive.
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Affiliation(s)
- Y Mensa-Wilmot
- Center for Food Safety and Quality Enhancement-Department of Food Science and Technology, University of Georgia, Agricultural Experiment Station, Griffin, GA 30223-1797, USA
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18
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Abstract
The term "normal foot" has many different interpretations. This article reviews some of the ways in which the word "normal" has been used historically to describe the foot. Also discussed are the problems of attempting to determine what should constitute a normal foot and proposed criteria for distinguishing between the normal and the pathological.
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Affiliation(s)
- R D Phillips
- Podiatry Section, Veterans Affairs Medical Center, Coatesville, PA 19320, USA
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Ward ED, Phillips RD, Patterson PE, Werkhoven GJ. 1998 William J. Stickel Gold Award. The effects of extrinsic muscle forces on the forefoot-to-rearfoot loading relationship in vitro. Tibia and Achilles tendon. J Am Podiatr Med Assoc 1998; 88:471-82. [PMID: 9791951 DOI: 10.7547/87507315-88-10-471] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [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: 02/03/2023]
Abstract
The effects of muscular activity on the distribution of forces under the foot, as well as within the foot, are of great importance for determining the mechanisms of foot pathologies. Limited data exist concerning muscle forces during the gait cycle and the effects of muscle forces conveyed to the ground-reactive forces of the foot. The authors developed a cadaveric loading system to determine the effects of force applied to the Achilles tendon on the forefoot-to-rearfoot loading relationship in eight cadaveric specimens. The study indicated that, during axial loading of the tibia, force was inherently transferred from the rearfoot to the forefoot. However, the observed forefoot-to-rearfoot loading relationship did not match the predicted loading relationship from a rigid-body diagram, as would be observed in a class I lever. The results indicated that, as the force was increased on the Achilles tendon, the change in loads on the forefoot and rearfoot was not linear. Specimens with calcaneal inclination angles greater than 20 degrees demonstrated a more linear increase as compared with those with inclination angles less than 20 degrees.
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Affiliation(s)
- E D Ward
- Human Performance Laboratory, College of Podiatric Medicine and Surgery, University of Osteopathic Medicine and Health Sciences, Des Moines, IA 50220, USA
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22
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Enwere NJ, McWatters KH, Phillips RD. Effect of processing on some properties of cowpea (Vigna unguiculata), seed, protein, starch, flour and akara. Int J Food Sci Nutr 1998; 49:365-73. [PMID: 10367006 DOI: 10.3109/09637489809089411] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [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: 11/13/2022]
Abstract
Large brown eye Kano white cowpea (Vigna unguiculata) seeds were processed into three batches of flour by wetting, drying individually at 30, 80, and 120 degrees C, decorticating and dry milling. Starch was extracted from the cowpea seed and protein from the flour using water as solvent. The water-extractable proteins were purified by dialysis and analysed by electrophoresis. The cowpea flour was used to produce akara balls (fried paste). The microstructure of the cowpea cotyledon, flour, starch and akara crumb were examined with a scanning electron microscope (SEM). Electrophoretic separation revealed that some of the protein fractions from the sample extracted from 30 degrees C dried cowpea were absent in the sample extracted from the 80 degrees C and 120 degrees C dried cowpeas or their quantities had decreased. In the SEM study, no difference was observed in the microstructure of the three flour samples except in the size and shape of the starch granules and particles of protein and cell wall material. The starch granules from the cowpea dried at 120 degrees C had surface defects. Cavities occurred in the cotyledons of the 80 and 120 degrees C dried cowpea seeds, some starch granules, protein matrix and sometimes the entire cell contents were lost from the cell. The protein sheet in the akara crumb became thicker as temperature increased to 80 and 120 degrees C.
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Affiliation(s)
- N J Enwere
- Department of Food Science and Technology, University of Nigeria, Nsukka, Enugu State, Nigeria
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Abstract
Motion in the ankle, subtalar, midtarsal, and first metatarsophalangeal joints has been well documented. However, motion in the first metatarsocuneiform, the first cuneonavicular, and the first interphalangeal joint has not been addressed. Motion in these joints has not been documented because many believe that little motion occurs at these joints, and because of the difficulty in assessing motion at these joints. Using two-dimensional motion analysis, the authors present sagittal plane ranges of motion occurring in the first metatarsophalangeal joint, the first metatarsocuneiform joint, the medial cuneonavicular joint, and the first interphalangeal joint during the propulsive period of gait. This pilot study indicates that sagittal plane motion between the navicular and calcaneus and between the first metatarsal and first cuneiform are very mild and inconsistent. However, plantarflexion motion between the first cuneiform and the navicular is significant and comprises most of the plantarflexion motion of the first ray during propulsion. Motion in the first interphalangeal joint is slight during the first 80% of the propulsive period but shows slight-to-moderate dorsiflexion during the last 20% of the propulsive period of gait.
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Affiliation(s)
- R D Phillips
- College of Podiatric Medicine and Surgery, University of Osteopathic Medicine and Health Sciences, Des Moines, IA, USA
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24
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Abstract
Cowpeas (Vigna unguiculata L. Walp) are an important grain legume in East and West African countries as well as in other developing countries. The U.S. is the only developed country producing large amounts of cowpeas. High protein (18 to 35%) and carbohydrate (50 to 65%) contents, together with an amino acid pattern complementary to that of cereal grains, make cowpeas potentially important to the human diet from a nutritional standpoint. Despite their potential as an inexpensive source of protein and energy, cowpeas are underutilized in the U.S. and other industrialized countries. A simple technology for preparing cowpea flour would stimulate increased consumption of this legume. This paper reviews the status of cowpea flour production technologies and uses of cowpea flour in various food products.
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Affiliation(s)
- W Prinyawiwatkul
- Department of Food Science and Technology, University of Georgia, Griffin 30223-1797, USA
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25
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McWatters KH, Resurreccion AV, Beuchat LR, Phillips RD. Use of peanut and cowpea in wheat-based products containing composite flours. Plant Foods Hum Nutr 1995; 47:71-87. [PMID: 7784400 DOI: 10.1007/bf01088169] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Cowpeas and peanuts are legumes of major dietary and economic importance. They are favored worldwide because of their palatability, contribution to nutritional status, and low cost as a protein source compared to animal protein. Flours processed from cowpeas and peanuts have unique physico-chemical and sensory properties when used in composite flour mixtures. Appropriate blends of cowpea and peanut flours to replace wheat flour in Chinese-type noodles, muffins, and tortillas were determined using modelling and optimization procedures. For noodles, 15% peanut flour and 8% cowpea flour supplementation produced an acceptable product with high protein content (21%). For wheat flour replacement in muffins, up to 43% cowpea and up to 44% peanut flours may be used. However, when wheat flour replacement is 50% or greater, cassava flour should comprise 56 to 72% of the blend with a few exceptions. In tortillas, 24% cowpea and 46% peanut flours produced products similar in quality characteristics to those made from 100% wheat flour. The systematic approach used in these studies is more efficient than the traditional substitution method to optimize sensory qualities of wheat-based products containing composite flours.
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Affiliation(s)
- K H McWatters
- Department of Food Science and Technology, University of Georgia, Griffin 30223, USA
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26
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Abstract
The etiology of hallux abducto valgus has been the topic of much study. The authors of this study have attempted to investigate an association of anomalous insertions of the tibialis posterior tendon and their relationship to hallux abducto valgus. The authors present evidence that such anomalous insertions are normal, but may contribute to the development of the deformity because of variations in those insertions. A biomechanical model for that contribution is proposed.
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Affiliation(s)
- J G Bozant
- College of Podiatric Medicine and Surgery, University of Osteopathic Medicine and Health Sciences, Des Moines, IA 50312
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27
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Abstract
Starchy legumes have been consumed by humans since the earliest practice of agriculture and have been ascribed medicinal and cultural as well as nutritional roles. They are an important component of the diet in the developing countries in Africa, Latin America, and Asia where they are especially valuable as a source of dietary protein to complement cereals, starchy roots and tubers. Legumes contain 20-30% protein which is generally rich in lysine and limiting in sulfur amino acids. The nutritional quality of legume protein is limited by the presence of both heat labile and heat stable antinutrients as well as an inherent resistance to digestion of the major globulins. In addition to its nutritional impact, legume protein has been shown to reduce plasma low density lipoprotein when consumed. Legume starch is more slowly digested than starch from cereals and tubers and produces less abrupt changes in plasma glucose and insulin upon ingestion. Starchy legumes are also valuable sources of dietary fiber as well as thiamin and riboflavin. Starchy legumes are a valuable component of a prudent diet, but their consumption is constrained by low yields, the lack of convenient food applications, and flatulence.
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Affiliation(s)
- R D Phillips
- Department of Food Science and Technology, University of Georgia, Griffin 30223
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28
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Phillips RD. Ankle dorsiflexion. J Am Podiatr Med Assoc 1993; 83:542-3; author reply 543-4. [PMID: 8289146 DOI: 10.7547/87507315-83-9-542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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29
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Abstract
The authors present a methodology to measure the frontal plane angular and linear displacement and the transverse plane angular displacement of subtalar joint movement. This method is combined with a modification of the Kirby method for determining the transverse plane projection of the subtalar joint axis onto the plantar foot. A mathematical model is then used to construct the subtalar joint axis into a three-dimensional linear equation. Data are obtained from an in vivo series of 62 feet that indicates that within acceptable clinical errors of measurement the subtalar joint is a ginglymus type of joint that moves around a single fixed axis. Results also indicate that the subtalar joint axis is more superior and lateral to the neutral foot than any previous studies on cadaver feet have shown. Finally, the authors show that once the subtalar joint axis can be accurately located, the torque on the joint axis produced by ground reactive forces and muscular forces can be computed.
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Affiliation(s)
- R D Phillips
- College of Podiatric Medicine and Surgery, University of Osteopathic Medicine and Health Sciences, Des Moines, IA 50312
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30
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Lovely RH, Creim JA, Kaune WT, Miller MC, Phillips RD, Anderson LE. Rats are not aversive when exposed to 60-Hz magnetic fields at 3.03 mT. Bioelectromagnetics 1992; 13:351-62. [PMID: 1445417 DOI: 10.1002/bem.2250130503] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [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: 12/27/2022]
Abstract
Thirty-two male rats were tested in two replicates of an experiment to determine whether body currents induced by 60-Hz magnetic fields might lead to avoidance behavior comparable to that which results from exposure to strong 60-Hz electric fields. The test apparatus was a two-compartment Plexiglas shuttlebox enclosed in a sound-attenuating plywood chamber, which in turn was encompassed by two copper bus bars that, when energized, served as a source of 60-Hz magnetic fields. Location of the rat, and traverse activity in the shuttlebox were monitored by nine infra-red photo detectors equally spaced along the length of the apparatus. Rats were divided into 2 groups: 1 group of rats (n = 8 per group per replicate) was sham exposed while rats in the other group (n = 8 per group per replicate) were exposed to a 3.03 mT (30.3 G), 60-Hz magnetic field whenever they traversed to or were located on the side (L or R) predetermined as the exposed side. To control artifact incident to side preference, the side exposed (L or R) was alternated over the exposed rats. Each rat was tested individually in a 1-h session. A 2-factor ANOVA (exposed vs. control, replicate 1 vs. replicate 2) failed to reveal any significant effects due to either factor or to an interaction between factors. These data demonstrate that rats do not avoid exposure to 60-Hz magnetic fields at a flux density of 3.03 mT and further imply that the avoidance by rats of high level 60-Hz electric fields is mediated by something other than the internal body currents induced by the exposure.
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Affiliation(s)
- R H Lovely
- Biology and Chemistry Department, Pacific Northwest Laboratory, Richland, Washington 99352
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31
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Abstract
One of the reasons that high heels may contribute to the formation of halux valgus is that the wearers pronate during propulsion. This pilot study was performed to determine whether relocation of the heel under the counter of a fashion high-heeled pump could change the degree of pronation of the foot during the gait cycle. The authors report that more foot stability was experienced by the subjects when the center of the heel was offset between 2 and 4 mm medial to the center of the heel counter. This study is designed to promote further research into whether the shoe industry should change the design parameters of high-heeled fashion shoes in order to improve foot function.
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Affiliation(s)
- R D Phillips
- College of Podiatric Medicine and Surgery, University of Osteopathic Medicine & Health Sciences, Des Moines, IA 50312
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32
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Freeman JJ, McKee RH, Phillips RD, Plutnick RT, Scala RA, Ackerman LJ. A 90-day toxicity study of the effects of petroleum middle distillates on the skin of C3H mice. Toxicol Ind Health 1990; 6:475-91. [PMID: 2237931 DOI: 10.1177/074823379000600309] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Petroleum middle distillates (PMDs) elicit skin tumors in mouse epidermal carcinogenesis studies. The response is characterized by a long latency with only a small percentage of animals developing tumors. Although the carcinogenic activity of certain other petroleum hydrocarbons largely depends upon the presence of polycyclic aromatic hydrocarbons (PAHs), many PMDs contain relatively low concentrations of PAHs. PMDs are also irritating to mouse skin, and chronic irritation may be involved in the development of skin tumors. This study was conducted to investigate the patterns of cutaneous irritation elicited by topical application of PMDs having compositional differences. The three PMDs selected for study were a steam cracked gas oil (SCGO), a lightly refined paraffinic oil (LRPO), and a jet fuel (JF). Male C3H/HeNCr1BR mice (25/group) were treated topically (37.5 microliters 2x/week for 13 weeks) with 10%, 50% or 100% (undiluted) concentrations of each PMD. Catalytically cracked clarified oil (CCCO, 10%), a potent carcinogen to mouse skin, was also tested. The vehicle was a noncarcinogenic mineral oil with a viscosity of 90 SUS. Cutaneous changes were evaluated by gross observations and light microscopy. Cutaneous irritation was the only significant toxic response in this study. Neither the vehicle nor any of the 10% PMD concentrations produced significant cutaneous irritation. The 10% CCCO and 50% PMD treatments all elicited slight to moderate proliferative and inflammatory changes in mouse skin. Ulcers were also observed microscopically in mice treated with 10% CCCO and 50% SCGO. The 100% SCGO treatment produced evidence of necrosis on Days 1-7 but not later in the study despite continued treatment. In contrast, the irritating effects of 100% LRPO were not evident until 2-3 weeks of study, and at study completion were characterized by moderately severe inflammatory and proliferative changes. The effects of 100% JF were qualitatively similar to 100% LRPO but less marked. Thus, the SCGO caused a different pattern of cutaneous responses than either LRPO or JF. The possible relationships of these cutaneous changes to epidermal carcinogenesis are being studied further.
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Affiliation(s)
- J J Freeman
- Exxon Biomedical Sciences, Inc., East Millstone, NJ 08875-2350
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Nack JD, Phillips RD. Shock absorption. Clin Podiatr Med Surg 1990; 7:391-7. [PMID: 2189543] [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: 12/30/2022]
Abstract
Abnormal shock is a major cause of chronic and overuse injuries to all aspects of the lower extremity. The two major causes of abnormal shock are (1) decreased fat pad under the calcaneus and (2) dysfunction of the subtalar joint pronation mechanism during contact. Enough literature now exists to indicate that podiatrists should provide prophylactic therapy for patients that exhibit abnormal shock during contact before symptomatology in the lower extremity or spine exhibits itself.
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Affiliation(s)
- J D Nack
- College of Podiatric Medicine and Surgery, University of Osteopathic Medicine and Health Sciences, Des Moines, Iowa
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34
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McKee RH, Daughtrey WC, Freeman JJ, Federici TM, Phillips RD, Plutnick RT. The dermal carcinogenic potential of unrefined and hydrotreated lubricating oils. J Appl Toxicol 1989; 9:265-70. [PMID: 2778262 DOI: 10.1002/jat.2550090411] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Unrefined lubricating oils contain relatively high levels of polycyclic aromatic hydrocarbons (PAH) and have been shown to induce tumors in mouse skin. Exxon has developed a new method of refining these materials, a severe hydrotreatment process that is optimized for PAH removal. The specific objectives of the current study were to assess PAH reduction and then to evaluate directly the dermal carcinogenic potential of the materials that spanned the range of products produced by this method. The test samples included unrefined light and heavy vacuum distillates from a naphthenic crude oil, as well as the corresponding severely hydrotreated products. Two sets of samples were prepared to assess the effects of various operating parameters in the reactor. Additionally, positive (benzo[a]pyrene), negative (white mineral oil) and vehicle (toluene) control groups were included to assess the sensitivity and specificity of the bioassay. Each sample was applied in twice-weekly aliquots to the backs of 40 male C3H mice. In the analytical studies, significant reductions in the levels of several specific PAH were demonstrated. In the dermal carcinogenesis studies, the unrefined oils and the positive control induced tumors and also significantly reduced survival. None of the mice treated with severely hydrotreated oils or with the negative or vehicle controls developed skin tumors, and survival of these mice was not significantly different from the control. Thus, the data demonstrated that this new, severe hydrotreatment process was an effective means of converting carcinogenic feedstocks to non-carcinogenic products.
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Affiliation(s)
- R H McKee
- Exxon Biomedical Sciences, Inc., East Millstone, NJ 08875-2350
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35
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Abstract
This article examines the variety of claims made about the effectiveness of play therapy in health care settings. The claims are organized into four categories of "promises": (a) mastery, autonomy, and control; (b) cooperation and communication; (c) coping with anxiety and fear; and (d) learning and information giving. The empirical questions within each promise are identified and relevant experimental research is discussed. The conclusion is that play therapy has not yet delivered on its promises in health care settings.
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36
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O'Donoghue JL, Haworth SR, Curren RD, Kirby PE, Lawlor T, Moran EJ, Phillips RD, Putnam DL, Rogers-Back AM, Slesinski RS. Mutagenicity studies on ketone solvents: methyl ethyl ketone, methyl isobutyl ketone, and isophorone. Mutat Res 1988; 206:149-61. [PMID: 3050497 DOI: 10.1016/0165-1218(88)90154-1] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
3 ketone solvents (methyl ethyl ketone (MEK), methyl isobutyl ketone (MiBK), and isophorone) were tested for potential genotoxicity. The assays of MEK and MiBK included the Salmonella/microsome (Ames) assay, L5178Y/TK+/- mouse lymphoma (ML) assay, BALB/3T3 cell transformation (CT) assay, unscheduled DNA synthesis (UDS) assay, and micronucleus (MN) assay. Only the ML, UDS, and MN assays were conducted on samples of isophorone. No genotoxicity was found for MEK or isophorone. The presence of a marginal response only at the highest, cytotoxic concentration tested in the ML assay, the lack of reproducibility in the CT assay, and clearly negative results in the Ames assay, UDS and MN assays, suggest that MiBK is unlikely to be genotoxic in mammalian systems.
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Affiliation(s)
- J L O'Donoghue
- Health and Environment Laboratories, Eastman Kodak Company, Rochester, NY 14652-3615
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37
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McKee RH, Phillips RD, Traul KA. The genetic toxicity of 1,2-dibromo-3-chloropropane, 1,2-dibromo-3-chloro-2-methylpropane, and 1,2,3-tribromo-2-methylpropane. Cell Biol Toxicol 1987; 3:391-406. [PMID: 3333733 DOI: 10.1007/bf00119912] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
1,2-Dibromo-3-chloro-2-methylpropane (DBCMP) and 1,2,3-tribromo-2-methylpropane (TBMP) are contaminants formed during the manufacture of bromobutyl rubber. These chemicals are structurally similar to 1,2-dibromo-3-chloropropane (DBCP), a known genotoxin and rodent carcinogen. The present study compared the genotoxic properties of DBCMP and TBMP to those of DBCP. In the Salmonella assay, DBCP was positive in strains TA-98, TA-100 and TA-1535 in the presence of exogenous activation; DBCP was weakly active in TA-1535 in the absence of activation. Neither DBCMP nor TBMP produced reproducible evidence of mutagenic activity in the Salmonella assay despite the use of several different variations of this test. In the mouse lymphoma gene mutation assay, DBCP and TBMP were positive in the presence and absence of activation, while DBCMP was positive only in the absence of activation. All three test compounds were active in the Syrian hamster embryo morphologic transformation assay. The results indicated that both DBCMP and TBMP exhibited some genotoxic activity as did DBCP. The presence of the methyl group on the 2-carbon position essentially eliminated the mutagenicity of DBCMP and TBMP in the Salmonella assay.
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Affiliation(s)
- R H McKee
- Exxon Biomedical Sciences, Inc., East Millstone, New Jersey 08873
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Phillips RD, Moran EJ, Dodd DE, Fowler EH, Kary CD, O'Donoghue J. A 14-week vapor inhalation toxicity study of methyl isobutyl ketone. Fundam Appl Toxicol 1987; 9:380-8. [PMID: 3691997 DOI: 10.1016/0272-0590(87)90020-0] [Citation(s) in RCA: 33] [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] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
In a 2-week probe study male and female Fischer-344 rats and B6C3F1 mice were exposed 6 hr/day to 2000, 500, 100, or 0 ppm methyl isobutyl ketone (MIBK). At 2000 ppm there was a slight increase in male rat liver weight (absolute and relative). The only changes observed histologically were increases in regenerative tubular epithelia and hyalin droplets in kidneys of male rats exposed to 2000 or 500 ppm. Exposure levels for a subchronic study were 0, 50, 250, or 1000 ppm methyl isobutyl ketone vapors 6 hr/day, 5 days per week, for 14 weeks. The 14 weeks of exposure had no adverse effect on the clinical health or growth of rats or mice. Male rats and male mice exposed to 1000 ppm MIBK had a slight but statistically significant increase in liver weight and the liver weight/body weight ratio. Liver weight was also increased slightly in male mice exposed to 250 ppm. No gross or microscopic hepatic lesions related to MIBK exposure were observed. Furthermore, the only microscopic change observed was an increase in the incidence and extent of hyalin droplets within proximal tubular cells of the kidneys of male rats exposed to 250 and 1000 ppm of MIBK. The relevance of the male rat kidney tubular effect to humans is not known. In conclusion, other than the male rat kidney effect, exposure of male and female rats and mice to MIBK at levels up to 1000 ppm for 14 weeks was without significant toxicological effect.
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Affiliation(s)
- R D Phillips
- Exxon Biomedical Sciences, Inc., East Millstone, New Jersey 08873
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Tyl RW, France KA, Fisher LC, Pritts IM, Tyler TR, Phillips RD, Moran EJ. Developmental toxicity evaluation of inhaled methyl isobutyl ketone in Fischer 344 rats and CD-1 mice. Fundam Appl Toxicol 1987; 8:310-27. [PMID: 3569702 DOI: 10.1016/0272-0590(87)90081-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Pregnant Fischer 344 rats and CD-1 mice were exposed to methyl isobutyl ketone vapor (CAS No. 108-10-1) by inhalation on Gestational Days 6 through 15 at concentrations of 0, 300, 1000, or 3000 ppm (mean analytical values of 0, 305, 1012, and 2997 ppm, respectively). The animals were sacrificed on Gestational Day 21 (rats) or 18 (mice), and live fetuses were examined for external, visceral, and skeletal alterations. In rats, exposure to 3000 ppm resulted in maternal toxicity expressed as clinical signs, decreased body weight and body weight gain, increased relative kidney weight, and decreased food consumption, and in fetotoxicity expressed as reduced fetal body weight per litter and reductions in skeletal ossification. In mice, exposure to 3000 ppm resulted in maternal toxicity expressed as exposure-related increases in deaths (12.0%, 3/25 dams), clinical signs, and increased absolute and relative liver weight, and in fetotoxicity expressed as increased incidence of dead fetuses, reduced fetal body weight per litter, and reductions in skeletal ossification. No treatment-related increases in embryotoxicity or fetal malformations were seen in either species at any exposure concentration tested. There was no evidence of treatment-related maternal, embryo, or fetal toxicity (including malformations) at 1000 or 300 ppm in either species.
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Abstract
Previous studies have raised the possibility of reproductive and developmental changes in miniature swine chronically exposed to a strong 60-Hz electric field. Two replicate experiments on rats were performed to determine if similar changes could be detected in animals exposed under a comparable regime, which was based on average, induced-current densities and on the chronology of reproductive development, as dosimetrically and biologically scaled. Beginning at three months of age, female rats of the F0 generation and their subsequent offspring were chronically exposed to a 60-Hz electric field (100 kV/m unperturbed) for 19 h/day for the duration of experimentation. After four weeks of exposure, F0 female rats were mated to unexposed male rats during the field-off period. No significant developmental effects were detected in their litters, confirming our previous results with swine and rats. The F0 females were mated for a second time at 7.2 months of age, and the fetuses were evaluated shortly before term. In the first experiments, the incidence of intrauterine mortality was significantly less in exposed than in sham-exposed litters, and there was a tendency (P = .12) for an increased incidence of malformed fetuses in exposed litters. Neither end point was significantly affected in the second experiment. Copulatory behavior of the female F1 offspring, which were bred at three months of age, was not affected in either experiment. There was a statistically significant decrease in the fertility of F1 exposed females and a significant increase in the fraction of exposed litters with malformed fetuses in the first experiment; both end points were essentially the same in the sham and exposed groups of the second experiment. That the significant effects detected in the first experiment were not seen in the second may be attributed to random or biological variation. Alternatively, the finding may indicate that the response threshold for induction of malformations lies near 100 kV/m.
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Affiliation(s)
- D N Rommereim
- Biology and Chemistry Department, Pacific Northwest Laboratories, Richland, Washington 99352
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Sikov MR, Rommereim DN, Beamer JL, Buschbom RL, Kaune WT, Phillips RD. Developmental studies of Hanford miniature swine exposed to 60-Hz electric fields. Bioelectromagnetics 1987; 8:229-42. [PMID: 3663248 DOI: 10.1002/bem.2250080303] [Citation(s) in RCA: 34] [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: 01/06/2023]
Abstract
Evaluations of reproductive and developmental toxicology, including teratology, were included as part of a broad screening study in Hanford Miniature swine (HMS) to detect effects of exposure to electric fields. One group (E) was exposed to a uniform, vertical, 60-Hz, 30-kV/m electric field for 20 h/day, 7 days/week; sham-exposed (SE) swine were housed in a separate, environmentally equivalent building. The first generation (F0) gilts were bred after 4 months of study; some were killed for teratologic assays at 100 days of gestation (dg), and the others produced an F1 generation of offspring. The pooled incidence of terata in these litters (teratologic assays and live births) was similar in the E and SE groups. The F0 females, which produced the F1 generation, were bred again after 18 months of exposure and were killed at 100 dg. Malformation incidence in E litters (75%) was significantly greater than in SE litters (29%). No consistent differences in litter size, fetal mass, or mass of fetal organs were detected. The F1 gilts were bred at 18 months of age; defective offspring were found in significantly more of the E litters (71%) than in SE litters (33%). These F1 females were bred again 10 months later and teratologic assays were performed on their second litters at 100 dg. The percentage of litters with malformed fetuses was essentially identical in the E and SE groups (70% and 73%, respectively). There appears to be an association between chronic exposure to a strong electric field and developmental effects in swine, although the change in incidence of malformations between generations and between the first and second breedings makes it impossible to conclude unequivocally that there is a cause-and-effect relation.
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Affiliation(s)
- M R Sikov
- Biology and Chemistry Department, Pacific Northwest Laboratories, Richland, Washington 99352
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Snellings WM, Dodd DE, Grice HC, Phillips RD. Monochlorodiisobutylene vapor: acute and 9-day inhalation studies in Fischer-344 rats and B6C3F1 mice. Fundam Appl Toxicol 1985; 5:506-14. [PMID: 4007308 DOI: 10.1016/0272-0590(85)90098-3] [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] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Acute and 9-day repeated exposures to monochlorodiisobutylene (CDIB) were conducted in male and female Fischer-344 rats and B6C3F1 mice. The 4-hr LC50 values for these animals ranged between 1400 and 2100 ppm. Animals in the 9-day study were exposed at a mean concentration of 478, 97, or 25 ppm of CDIB for 6 hr per day. Treatment-related effects differed between species in this study. Body weight change was decreased in rats. Morphologic changes in the kidneys with accompanying polyuria and hematuria/hemoglobinuria were observed in male rats. The only effect observed at 25 ppm was a low incidence of hematuria/hemoglobinuria in male rats. Mice appeared unaffected by exposure to CDIB at levels as high as 478 ppm.
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Phillips RD. Dysfunction of the peroneus longus after fracture of the cuboid. J Foot Surg 1985; 24:99-102. [PMID: 3989234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The author presents two case histories to demonstrate the disabling effects of fracture of the cuboid. He believes that a fracture of the cuboid is as disabling as an intra-articular fracture and should be treated in the same manner because an injury to any sinus or sulcus that contains a synovial lining for the free gliding action of a tendon should receive the same treatment as a joint injury.
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Abstract
Kidney tissues from Fischer 344 rats exposed by inhalation to either 5.48, 1.83, or 0.0 g/m3 of C10-C11 isoparaffinic solvent vapor for 5, 20 and 40 days (6 h/day, 5 days/week), followed by a 4-week recovery period, were examined by light microscopy (LM) and electron microscopy (EM). At the LM level, an increased incidence of protein droplets was found in the cytoplasm of renal tubular epithelial cells of the exposed male rats relative to controls. Other renal changes observed by LM in the exposed male rats included foci of regenerative epithelium and tubular dilatation with intratubular protein occurring between the inner and outer stripe of the medulla. By EM, the protein droplets were electron dense, angular, crystalline-like structures which were surrounded by acid phosphatase positive reaction product corresponding to remnants of membrane-bound phagolysosomes. After 20 and 40 days of exposure there was focal loss of the brush border, with degeneration and sloughing of necrotic cells. Following a 4-week recovery period reversal of the exposure-related tubular changes was indicated by EM. The kidney changes observed in male rats following exposure to light hydrocarbons have not been observed in female rats or other species and may be unique to the male rat.
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Phillips RD, Egan GF. Subchronic inhalation exposure of dearomatized white spirit and C10-C11 isoparaffinic hydrocarbon in Sprague-Dawley rats. Fundam Appl Toxicol 1984; 4:808-18. [PMID: 6510613 DOI: 10.1016/0272-0590(84)90103-9] [Citation(s) in RCA: 32] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Groups of 35 male and 35 female Sprague-Dawley rats were exposed to either Dearomatized White Spirit (DAWS) vapor at concentrations of 1.97 and 5.61 g/m3 or C10-C11 Isoparaffinic Hydrocarbon (IPH) vapor at concentrations of 1.91 and 5.62 g/m3. These concentrations were targeted for the recommended occupational exposure limits and three times that value, respectively. Exposures were 6 hr-day, 5 days/week for 12 weeks. Following Weeks 4, 8, and 12 of exposure, a total of 10, 10, and 15 rats, respectively, from each group were sacrificed. Clinical chemistry and hematology parameters were measured in blood samples taken immediately prior to sacrifice, and selected organs were removed and weighted. Twenty-three organs and tissues from each animal were examined microscopically. There were no deaths during the course of this study related to either DAWS or IPH. Mean body weights were significantly lower than controls in male rats following exposure to 5.61 g/m3 DAWS, and 5.62 or 1.91 g/m3 IPH. Body weights were not affected in females. The primary effects from DAWS or IPH exposure were observed in the kidneys of male rats only from both exposure groups beginning at Week 4. Evidence of mild tubular toxicity, such as regenerative tubular epithelia and dilated tubules containing proteinaceous casts, was observed at the corticomedullary junction. The incidence and severity appeared to increase with increasing concentration and exposure duration. There were scattered instances of statistically significant increases in liver and kidney weights in both males and females. With the exception of the mild male rat tubular nephrotoxicity, other significant toxic effects were not observed at levels tested.
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Phillips RD, Egan GF. Effect of C10-C11 isoparaffinic solvent on kidney function in Fischer 344 rats during eight weeks of inhalation. Toxicol Appl Pharmacol 1984; 73:500-10. [PMID: 6719465 DOI: 10.1016/0041-008x(84)90102-9] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Two groups of 50 male and 50 female Fischer 344 rats were exposed by inhalation to either 5.48 g/m3 (900 ppm) or 1.83 g/m3 (300 ppm) of C10-C11 isoparaffin (IP) 6 hr/day, 5 days/week for 8 weeks to evaluate renal function and histologic effects. Another group of rats (50/sex) was air exposed and served as controls. Urine and blood were collected from 10 male and 10 female rats of each group after 1, 4, and 8 weeks, and following a 4-week period of recovery. The ability of males to concentrate urine was reduced at 4 and 8 weeks of exposure to either level of IP. Following the 4-week recovery period, the urine concentrating ability of the exposed groups showed evidence of recovery. Following 4 and 8 weeks of exposure, glucose, protein, and epithelial cell excretion in urine of males was higher in the exposed groups than in that of controls. Creatinine clearance decreased after 8 weeks in the male high exposure group. After 4 weeks of recovery, urine glucose, protein, epithelial cell exfoliation, and creatinine clearance returned to control levels in exposed male rats. Overall, the effect on kidney function in male rats was mild, with evidence of near complete recovery. Histologic changes in exposed male rats compared to controls included an increased incidence of regenerative tubular epithelia and tubules dilated at the corticomedullary junction with proteinaceous debris in the tubules. No functional or histologic changes were observed in exposed female rats.
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Creim JA, Lovely RH, Kaune WT, Phillips RD. Attempts to produce taste-aversion learning in rats exposed to 60-Hz electric fields. Bioelectromagnetics 1984; 5:271-82. [PMID: 6233984 DOI: 10.1002/bem.2250050214] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
A measure of taste-aversion (TA) learning was used in three experiments to 1) determine whether exposure to intense 60-Hz electric fields can produce TA learning in male Sprague-Dawley rats, and 2) establish a dose-response function for the behavior in question. In Experiment 1, four groups of eight rats each were distributed into one of two exposures (69 +/- 5 kV/m or 133 +/- 10 kV/m) or into one of two sham-exposure groups. Conditioning trials paired 0.1% sodium saccharin in water with 3 h of exposure to a 60-Hz electric field. Following five conditioning trials, a 20-min, two-bottle preference test between water and saccharin-flavored water failed to reveal TA conditioning in exposed groups. In Experiment 2, four groups of eight rats each (34 +/- 2 kV/m or 133 +/- 10 kV/m and two sham-exposed groups) were treated as before. Electric-field exposure had no effect on TA learning. Experiment 3 tested for a possible synergy between a minimal dose (for TA learning) of cyclophosphamide (6 mg/kg) and 5 h of exposure to 133 +/- 10 kV/m electric fields in a dark environment under conditions otherwise similar to those of Experiments 1 and 2. The results indicated no TA learning as reflected in the relative consumption of saccharin.
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Sikov MR, Montgomery LD, Smith LG, Phillips RD. Studies on prenatal and postnatal development in rats exposed to 60-Hz electric fields. Bioelectromagnetics 1984; 5:101-12. [PMID: 6712745 DOI: 10.1002/bem.2250050111] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
A series of three experiments was performed to determine the effects of 30-day exposures to uniform 60-Hz electric fields (100 kV/m) on reproduction and on growth and development in the fetuses and offspring of rats. In the first experiment, exposure of females for 6 days prior to and during the mating period did not affect their reproductive performance, and continued exposure through 20 days of gestation (dg) did not affect the viability, size, or morphology of their fetuses. In the second experiment, exposure of the pregnant rat was begun on 0 dg and continued until the resulting offspring reached 8 days of age. In the third experiment, exposure began at 17 dg and continued through 25 days of postnatal life. In the second and third experiments, no statistically significant differences suggesting impairment of the growth or survival of exposed offspring were detected. In the second experiment, a significantly greater percentage of the exposed offspring showed movement, standing, and grooming at 14 days of age than among-sham-exposed offspring. There was a significant decrease at 14 days in the percentage of exposed offspring displaying the righting reflex in the second experiment and negative geotropism in the third experiment. These differences were all transient and were not found when the animals were tested again at 21 days of age. Evaluation of the reproductive integrity of the offspring of the second experiment did not disclose any deficits.
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