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Foster SL, Breukelaar IA, Ekanayake K, Lewis S, Korgaonkar MS. Functional Magnetic Resonance Imaging of the Amygdala and Subregions at 3 Tesla: A Scoping Review. J Magn Reson Imaging 2024; 59:361-375. [PMID: 37352130 DOI: 10.1002/jmri.28836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2023] [Revised: 05/18/2023] [Accepted: 05/18/2023] [Indexed: 06/25/2023] Open
Abstract
The amygdalae are a pair of small brain structures, each of which is composed of three main subregions and whose function is implicated in neuropsychiatric conditions. Functional Magnetic Resonance Imaging (fMRI) has been utilized extensively in investigation of amygdala activation and functional connectivity (FC) with most clinical research sites now utilizing 3 Tesla (3T) MR systems. However, accurate imaging and analysis remains challenging not just due to the small size of the amygdala, but also its location deep in the temporal lobe. Selection of imaging parameters can significantly impact data quality with implications for the accuracy of study results and validity of conclusions. Wide variation exists in acquisition protocols with spatial resolution of some protocols suboptimal for accurate assessment of the amygdala as a whole, and for measuring activation and FC of the three main subregions, each of which contains multiple nuclei with specialized roles. The primary objective of this scoping review is to provide a broad overview of 3T fMRI protocols in use to image the activation and FC of the amygdala with particular reference to spatial resolution. The secondary objective is to provide context for a discussion culminating in recommendations for a standardized protocol for imaging activation of the amygdala and its subregions. As the advantages of big data and protocol harmonization in imaging become more apparent so, too, do the disadvantages of data heterogeneity. EVIDENCE LEVEL: 3 TECHNICAL EFFICACY: Stage 2.
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Affiliation(s)
- Sheryl L Foster
- Sydney School of Health Sciences, Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales, Australia
- Department of Radiology, Westmead Hospital, Westmead, New South Wales, Australia
| | - Isabella A Breukelaar
- Brain Dynamics Centre, The Westmead Institute for Medical Research, Westmead, New South Wales, Australia
| | - Kanchana Ekanayake
- University Library, The University of Sydney, Sydney, New South Wales, Australia
| | - Sarah Lewis
- Sydney School of Health Sciences, Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales, Australia
| | - Mayuresh S Korgaonkar
- Brain Dynamics Centre, The Westmead Institute for Medical Research, Westmead, New South Wales, Australia
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2
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Griffiths KR, Breukelaar IA, Harvie G, Yang J, Foster SL, Harris AW, Clarke S, Hay PJ, Touyz S, Korgaonkar MS, Kohn MR. Functional Connectivity Mechanisms Underlying Symptom Reduction Following Lisdexamfetamine Treatment in Binge-Eating Disorder: A Clinical Trial. Biol Psychiatry Glob Open Sci 2024; 4:317-325. [PMID: 38298797 PMCID: PMC10829641 DOI: 10.1016/j.bpsgos.2023.08.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 08/03/2023] [Accepted: 08/21/2023] [Indexed: 02/02/2024] Open
Abstract
Background Speculation exists as to whether lisdexamfetamine dimesylate (LDX) acts on the functional connectivity (FC) of brain networks that modulate appetite, reward, or inhibitory control in binge-eating disorder (BED). Better insights into its action may help guide the development of more targeted therapeutics and identify who will benefit most from this medication. Here, we use a comprehensive data-driven approach to investigate the brain FC changes that underlie the therapeutic action of LDX in patients with BED. Methods Forty-six participants with moderate to severe BED received LDX titrated to 50 or 70 mg for an 8-week period. Twenty age-matched healthy control participants were also recruited. Resting-state functional magnetic resonance imaging was used to probe changes in brain FC pre- and post treatment and correlated with change in clinical measures. Results Ninety-seven percent of trial completers (n = 31) experienced remission or a reduction to mild BED during the 8-week LDX trial. Widespread neural FC changes occurred, with changes in default mode to limbic, executive control to subcortical, and default mode to executive control networks associated with improvements in clinical outcomes. These connections were not distinct from control participants at pretreatment but were different from control participants following LDX treatment. Pretreatment connectivity did not predict treatment response. Conclusions FC between networks associated with self-referential processing, executive function, and reward seem to underlie the therapeutic effect of LDX in BED. This suggests that LDX activates change via multiple systems, with most changes in compensatory networks rather than in those characterizing the BED diagnosis.
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Affiliation(s)
- Kristi R. Griffiths
- Brain Dynamics Centre, Westmead Institute for Medical Research, The University of Sydney, Westmead, New South Wales, Australia
- InsideOut Institute, University of Sydney, Sydney Local Health District, Sydney, New South Wales, Australia
| | - Isabella A. Breukelaar
- Brain Dynamics Centre, Westmead Institute for Medical Research, The University of Sydney, Westmead, New South Wales, Australia
- School of Psychology, University of New South Wales, Sydney, New South Wales, Australia
| | - Grace Harvie
- Brain Dynamics Centre, Westmead Institute for Medical Research, The University of Sydney, Westmead, New South Wales, Australia
| | - Jenny Yang
- Brain Dynamics Centre, Westmead Institute for Medical Research, The University of Sydney, Westmead, New South Wales, Australia
| | - Sheryl L. Foster
- Brain Dynamics Centre, Westmead Institute for Medical Research, The University of Sydney, Westmead, New South Wales, Australia
- Department of Radiology, Westmead Hospital, Sydney, New South Wales, Australia
| | - Anthony W. Harris
- Brain Dynamics Centre, Westmead Institute for Medical Research, The University of Sydney, Westmead, New South Wales, Australia
- Specialty of Psychiatry, Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales, Australia
| | - Simon Clarke
- Centre for Research into Adolescents’ Health, University of Sydney, Sydney, New South Wales, Australia
- Adolescent and Young Adult Medicine, Westmead Hospital, Sydney, New South Wales, Australia
| | - Phillipa J. Hay
- Translational Health Research Institute, School of Medicine, Western Sydney University, Sydney, New South Wales, Australia
- Mental Health Services, Camden and Campbelltown Hospitals, South Western Sydney Local Health District, Sydney, New South Wales, Australia
| | - Stephen Touyz
- InsideOut Institute, University of Sydney, Sydney Local Health District, Sydney, New South Wales, Australia
- Clinical Psychology Unit, School of Psychology, University of Sydney, Sydney, New South Wales, Australia
| | - Mayuresh S. Korgaonkar
- Brain Dynamics Centre, Westmead Institute for Medical Research, The University of Sydney, Westmead, New South Wales, Australia
| | - Michael R. Kohn
- Brain Dynamics Centre, Westmead Institute for Medical Research, The University of Sydney, Westmead, New South Wales, Australia
- Centre for Research into Adolescents’ Health, University of Sydney, Sydney, New South Wales, Australia
- Adolescent and Young Adult Medicine, Westmead Hospital, Sydney, New South Wales, Australia
- Clinical Psychology Unit, School of Psychology, University of Sydney, Sydney, New South Wales, Australia
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Peek AL, Rebbeck TJ, Leaver AM, Foster SL, Refshauge KM, Puts NA, Oeltzschner G. A comprehensive guide to MEGA-PRESS for GABA measurement. Anal Biochem 2023; 669:115113. [PMID: 36958511 PMCID: PMC10805000 DOI: 10.1016/j.ab.2023.115113] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 03/06/2023] [Accepted: 03/07/2023] [Indexed: 03/25/2023]
Abstract
The aim of this guideline is to provide a series of evidence-based recommendations that allow those new to using MEGA-PRESS to produce high-quality data for the measurement of GABA levels using edited magnetic resonance spectroscopy with the MEGA-PRESS sequence at 3T. GABA is the main inhibitory neurotransmitter of the central nervous system and has been increasingly studied due to its relevance in many clinical disorders of the central nervous system. MEGA-PRESS is the most widely used method for quantification of GABA at 3T, but is technically challenging and operates at a low signal-to-noise ratio. Therefore, the acquisition of high-quality MRS data relies on avoiding numerous pitfalls and observing important caveats. The guideline was developed by a working party that consisted of experts in MRS and experts in guideline development and implementation, together with key stakeholders. Strictly following a translational framework, we first identified evidence using a systematically conducted scoping literature review, then synthesized and graded the quality of evidence that formed recommendations. These recommendations were then sent to a panel of 21 world leaders in MRS for feedback and approval using a modified-Delphi process across two rounds. The final guideline consists of 23 recommendations across six domains essential for GABA MRS acquisition (Parameters, Practicalities, Data acquisition, Confounders, Quality/reporting, Post-processing). Overall, 78% of recommendations were formed from high-quality evidence, and 91% received agreement from over 80% of the expert panel. These 23 expert-reviewed recommendations and accompanying extended documentation form a readily useable guideline to allow those new to using MEGA-PRESS to design appropriate MEGA-PRESS study protocols and generate high-quality data.
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Affiliation(s)
- A L Peek
- Faculty of Medicine and Health, University of Sydney, Camperdown, New South Wales, 2141, Australia; NHMRC Centre of Research Excellence in Road Traffic Injury Recovery, Queensland, Australia.
| | - T J Rebbeck
- Faculty of Medicine and Health, University of Sydney, Camperdown, New South Wales, 2141, Australia; NHMRC Centre of Research Excellence in Road Traffic Injury Recovery, Queensland, Australia.
| | - A M Leaver
- Faculty of Medicine and Health, University of Sydney, Camperdown, New South Wales, 2141, Australia.
| | - S L Foster
- Faculty of Medicine and Health, University of Sydney, Camperdown, New South Wales, 2141, Australia; Department of Radiology, Westmead Hospital, Hawkesbury Road, Westmead, New South Wales, 2145, Australia.
| | - K M Refshauge
- Faculty of Medicine and Health, University of Sydney, Camperdown, New South Wales, 2141, Australia.
| | - N A Puts
- Department of Forensic and Neurodevelopmental Sciences, Sackler Institute for Translational Neurodevelopment, Institute of Psychiatry, Psychology, and Neuroscience, Kings College London, UK.
| | - G Oeltzschner
- Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, MD, 21287, United States; F.M. Kirby Research Center for Functional Brain Imaging, Kennedy Krieger Institute, Baltimore, MD, 21205, United States.
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Rai S, Griffiths KR, Breukelaar IA, Barreiros AR, Boyce P, Hazell P, Foster SL, Malhi GS, Harris AWF, Korgaonkar MS. Common and differential neural mechanisms underlying mood disorders. Bipolar Disord 2022; 24:795-805. [PMID: 35972439 DOI: 10.1111/bdi.13248] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [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] [Indexed: 12/30/2022]
Abstract
BACKGROUND Despite homogenous clinical presentations between bipolar and unipolar disorders, there are distinct neurobiological differences. Chronicity of illness may be a factor impacting and sustaining certain neural features. The goal of this study was to investigate common and shared neural mechanisms underlying mood disorders, and possible sustained neural changes relating to illness chronicity by investigating a cohort of euthymic patients with bipolar disorder (BD), unipolar depression who had responded to treatment (treatment-sensitive depression, TSD), and a chronically treatment-resistant depressed (TRD) group. METHODS One hundred and seventy-two participants (40 BD, 39 TSD, 40 TRD, and 53 age-gender-matched healthy controls) underwent resting-state fMRI scans. Seed-based and independent component analyses were performed to investigate group differences in resting-state connectivity between the four groups. RESULTS All three clinical groups had significantly lower connectivity within the frontoparietal network (FPN) relative to controls. TRD and BD were significantly different from TSD (TRD, BD > TSD) but were not significantly different from each other. TRDs were also significantly different from both BD and TSD for salience network connectivity with the posterior cingulate (DMN) and the FPN with frontal pole (DMN). Additionally, the BD group exhibited greater DMN-FPN (sgACC-RDLPFC) connectivity relative to TRD, TSD, and controls, which was correlated with a previous number of depressive episodes, in the BD group only. CONCLUSIONS BD demonstrated shared and differential connectivity features relative to symptomatic TRD and euthymic TSD groups. The increased sgACC-RDLPFC connectivity in BD and its correlation with a number of depressive episodes could be a neural feature associated with illness chronicity.
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Affiliation(s)
- Sabina Rai
- Brain Dynamics Centre, Westmead Institute for Medical Research, The University of Sydney, Westmead, Sydney, New South Wales, Australia.,Faculty of Medicine and Health, Westmead Clinical School, The University of Sydney, Sydney, New South Wales, Australia
| | - Kristi R Griffiths
- Brain Dynamics Centre, Westmead Institute for Medical Research, The University of Sydney, Westmead, Sydney, New South Wales, Australia
| | - Isabella A Breukelaar
- Brain Dynamics Centre, Westmead Institute for Medical Research, The University of Sydney, Westmead, Sydney, New South Wales, Australia.,School of Psychology, University of New South Wales, Sydney, New South Wales, Australia
| | - Ana R Barreiros
- Brain Dynamics Centre, Westmead Institute for Medical Research, The University of Sydney, Westmead, Sydney, New South Wales, Australia.,Faculty of Medicine and Health, Westmead Clinical School, The University of Sydney, Sydney, New South Wales, Australia
| | - Philip Boyce
- Specialty of Psychiatry, The University of Sydney School of Medicine, Sydney, New South Wales, Australia
| | - Philip Hazell
- Specialty of Psychiatry, The University of Sydney School of Medicine, Sydney, New South Wales, Australia
| | - Sheryl L Foster
- Department of Radiology, Westmead Hospital, New South Wales, Australia.,Faculty of Medicine and Health, Sydney School of Health Sciences, The University of Sydney, Sydney, New South Wales, Australia
| | - Gin S Malhi
- Specialty of Psychiatry, The University of Sydney School of Medicine, Sydney, New South Wales, Australia.,Department of Psychiatry, CADE Clinic, Royal North Shore Hospital, Sydney, New South Wales, Australia.,Department of Psychiatry, University of Oxford, Oxford, UK
| | - Anthony W F Harris
- Brain Dynamics Centre, Westmead Institute for Medical Research, The University of Sydney, Westmead, Sydney, New South Wales, Australia.,Specialty of Psychiatry, The University of Sydney School of Medicine, Sydney, New South Wales, Australia
| | - Mayuresh S Korgaonkar
- Brain Dynamics Centre, Westmead Institute for Medical Research, The University of Sydney, Westmead, Sydney, New South Wales, Australia.,Specialty of Psychiatry, The University of Sydney School of Medicine, Sydney, New South Wales, Australia.,Faculty of Medicine and Health, Sydney School of Health Sciences, The University of Sydney, Sydney, New South Wales, Australia
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Rai S, Griffiths KR, Breukelaar IA, Barreiros AR, Chen W, Boyce P, Hazell P, Foster SL, Malhi GS, Harris AWF, Korgaonkar MS. Default-mode and fronto-parietal network connectivity during rest distinguishes asymptomatic patients with bipolar disorder and major depressive disorder. Transl Psychiatry 2021; 11:547. [PMID: 34689161 PMCID: PMC8542033 DOI: 10.1038/s41398-021-01660-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Revised: 09/21/2021] [Accepted: 10/01/2021] [Indexed: 11/08/2022] Open
Abstract
Bipolar disorder (BD) is commonly misdiagnosed as major depressive disorder (MDD). This is understandable, as depression often precedes mania and is otherwise indistinguishable in both. It is therefore imperative to identify neural mechanisms that can differentiate the two disorders. Interrogating resting brain neural activity may reveal core distinguishing abnormalities. We adopted an a priori approach, examining three key networks documented in previous mood disorder literature subserving executive function, salience and rumination that may differentiate euthymic BD and MDD patients. Thirty-eight patients with BD, 39 patients with MDD matched for depression severity, and 39 age-gender matched healthy controls, completed resting-state fMRI scans. Seed-based and data-driven Independent Component analyses (ICA) were implemented to examine group differences in resting-state connectivity (pFDR < 0.05). Seed analysis masks were target regions identified from the fronto-parietal (FPN), salience (SN) and default-mode (DMN) networks. Seed-based analyses identified significantly greater connectivity between the subgenual cingulate cortex (DMN) and right dorsolateral prefrontal cortex (FPN) in BD relative to MDD and controls. The ICA analyses also found greater connectivity between the DMN and inferior frontal gyrus, an FPN region in BD relative to MDD. There were also significant group differences across the three networks in both clinical groups relative to controls. Altered DMN-FPN functional connectivity is thought to underlie deficits in the processing, management and regulation of affective stimuli. Our results suggest that connectivity between these networks could potentially distinguish the two disorders and could be a possible trait mechanism in BD persisting even in the absence of symptoms.
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Affiliation(s)
- Sabina Rai
- Brain Dynamics Centre, Westmead Institute for Medical Research, The University of Sydney, Westmead, Sydney, NSW, Australia.
| | - Kristi R Griffiths
- Brain Dynamics Centre, Westmead Institute for Medical Research, The University of Sydney, Westmead, Sydney, NSW, Australia
| | - Isabella A Breukelaar
- Brain Dynamics Centre, Westmead Institute for Medical Research, The University of Sydney, Westmead, Sydney, NSW, Australia
- School of Psychology, University of New South Wales, Sydney, NSW, Australia
| | - Ana R Barreiros
- Brain Dynamics Centre, Westmead Institute for Medical Research, The University of Sydney, Westmead, Sydney, NSW, Australia
| | - Wenting Chen
- Brain Dynamics Centre, Westmead Institute for Medical Research, The University of Sydney, Westmead, Sydney, NSW, Australia
| | - Philip Boyce
- Discipline of Psychiatry, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW, Australia
| | - Philip Hazell
- Discipline of Psychiatry, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW, Australia
| | - Sheryl L Foster
- Department of Radiology, Westmead Hospital, Sydney, NSW, Australia
- Sydney School of Health Sciences, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW, Australia
| | - Gin S Malhi
- Discipline of Psychiatry, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW, Australia
- CADE Clinic, Department of Psychiatry, Royal North Shore Hospital, Sydney, NSW, Australia
| | - Anthony W F Harris
- Brain Dynamics Centre, Westmead Institute for Medical Research, The University of Sydney, Westmead, Sydney, NSW, Australia
- Discipline of Psychiatry, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW, Australia
| | - Mayuresh S Korgaonkar
- Brain Dynamics Centre, Westmead Institute for Medical Research, The University of Sydney, Westmead, Sydney, NSW, Australia.
- Discipline of Psychiatry, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW, Australia.
- Sydney School of Health Sciences, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW, Australia.
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Breukelaar IA, Griffiths KR, Harris A, Foster SL, Williams LM, Korgaonkar MS. Intrinsic functional connectivity of the default mode and cognitive control networks relate to change in behavioral performance over two years. Cortex 2020; 132:180-190. [PMID: 32987241 DOI: 10.1016/j.cortex.2020.08.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Revised: 07/31/2020] [Accepted: 08/23/2020] [Indexed: 10/23/2022]
Abstract
Understanding how brain circuitry mediates cognitive control of behavior is crucial for understanding both mental health and disease. Cognitive control describes the group of behaviors that guide goal-directed action such as sustaining attention, processing information and inhibiting impulsive responses. We rely on these behaviors for daily social, occupational and emotional functioning. Two brain networks, the cognitive control network (CCN) and default mode network (DMN), are thought to cooperate in an inverse relationship to support these functions. However, we do not yet know how connectivity within and between these networks directly relates to healthy cognitive control behaviors, and whether these interactions change over time. Here, we employed a longitudinal design to investigate if change in intrinsic connectivity in these networks will correlate with change in a range of cognitive control functions. Over two years, 109 healthy individuals, aged eight to thirty-eight, were tested twice using fMRI to assess intrinsic functional connectivity of the CCN and DMN and a validated cognitive battery. We found that increased within-network connectivity through central and left DMN was associated with increased memory performance. Additionally, decreased connectivity between posterior parietal CCN and DMN nodes and decreased connectivity between left and right dorsolateral prefrontal nodes was associated with increased cognitive performance. These findings were age and gender controlled, suggesting that age-independent plastic change in intrinsic connectivity through these networks directly relate to changing behavior. This has implications for targeting intrinsic connectivity as a possible mechanism to improve cognitive function.
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Affiliation(s)
- Isabella A Breukelaar
- Brain Dynamics Centre, The Westmead Institute for Medical Research, The University of Sydney, Westmead, NSW, Australia.
| | - Kristi R Griffiths
- Brain Dynamics Centre, The Westmead Institute for Medical Research, The University of Sydney, Westmead, NSW, Australia
| | - Anthony Harris
- Brain Dynamics Centre, The Westmead Institute for Medical Research, The University of Sydney, Westmead, NSW, Australia; Discipline of Psychiatry, Sydney Medical School, Westmead, NSW, Australia
| | - Sheryl L Foster
- Department of Radiology, Westmead Hospital, Westmead, NSW, Australia; The Discipline of Medical Radiation Sciences, Faculty of Health Science, The University of Sydney, NSW, Australia
| | - Leanne M Williams
- Brain Dynamics Centre, The Westmead Institute for Medical Research, The University of Sydney, Westmead, NSW, Australia; Psychiatry and Behavioral Sciences, Stanford University, Stanford, CA, USA; MIRECC, Palo Alto VA, Palo Alto, CA, USA
| | - Mayuresh S Korgaonkar
- Brain Dynamics Centre, The Westmead Institute for Medical Research, The University of Sydney, Westmead, NSW, Australia; Discipline of Psychiatry, Sydney Medical School, Westmead, NSW, Australia.
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Crosson T, Roversi K, Balood M, Othman R, Ahmadi M, Wang JC, Seadi Pereira PJ, Tabatabaei M, Couture R, Eichwald T, Latini A, Prediger RD, Rangachari M, Seehus CR, Foster SL, Talbot S. Profiling of how nociceptor neurons detect danger - new and old foes. J Intern Med 2019; 286:268-289. [PMID: 31282104 DOI: 10.1111/joim.12957] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [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] [Indexed: 02/06/2023]
Abstract
The host evolves redundant mechanisms to preserve physiological processing and homeostasis. These functions range from sensing internal and external threats, creating a memory of the insult and generating reflexes, which aim to resolve inflammation. Impairment in such functioning leads to chronic inflammatory diseases. By interacting through a common language of ligands and receptors, the immune and sensory nervous systems work in concert to accomplish such protective functions. Whilst this bidirectional communication helps to protect from danger, it can contribute to disease pathophysiology. Thus, the somatosensory nervous system is anatomically positioned within primary and secondary lymphoid tissues and mucosa to modulate immunity directly. Upstream of this interplay, neurons detect danger, which prompts the release of neuropeptides initiating (i) defensive reflexes (ranging from withdrawal response to coughing) and (ii) chemotaxis, adhesion and local infiltration of immune cells. The resulting outcome of such neuro-immune interplay is still ill-defined, but consensual findings start to emerge and support neuropeptides not only as blockers of TH 1-mediated immunity but also as drivers of TH 2 immune responses. However, the modalities detected by nociceptors revealed broader than mechanical pressure and temperature sensing and include signals as various as cytokines and pathogens to immunoglobulins and even microRNAs. Along these lines, we aggregated various dorsal root ganglion sensory neuron expression profiling datasets supporting such wide-ranging sensing capabilities to help identifying new danger detection modalities of these cells. Thus, revealing unexpected aspects of nociceptor neuron biology might prompt the identification of novel drivers of immunity, means to resolve inflammation and strategies to safeguard homeostasis.
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Affiliation(s)
- T Crosson
- From the, Département de Pharmacologie et Physiologie, Faculté de Médecine, Université de Montréal, Montréal, QC, Canada
| | - K Roversi
- From the, Département de Pharmacologie et Physiologie, Faculté de Médecine, Université de Montréal, Montréal, QC, Canada.,Departamento de Farmacologia Centro de Ciências Biológicas, Universidade Federal de Santa Catarina, Florianópolis, Brazil
| | - M Balood
- From the, Département de Pharmacologie et Physiologie, Faculté de Médecine, Université de Montréal, Montréal, QC, Canada.,Axe Neurosciences, Centre de recherche du CHU, Université Laval, Québec, QC, Canada.,Département de Médecine Moléculaire, Faculté de Médecine, Université Laval, Québec, QC, Canada
| | - R Othman
- From the, Département de Pharmacologie et Physiologie, Faculté de Médecine, Université de Montréal, Montréal, QC, Canada
| | - M Ahmadi
- From the, Département de Pharmacologie et Physiologie, Faculté de Médecine, Université de Montréal, Montréal, QC, Canada
| | - J-C Wang
- From the, Département de Pharmacologie et Physiologie, Faculté de Médecine, Université de Montréal, Montréal, QC, Canada.,Graduate Institute of Microbiology, College of Medicine, National Taiwan University, Taipei, Taiwan
| | | | - M Tabatabaei
- From the, Département de Pharmacologie et Physiologie, Faculté de Médecine, Université de Montréal, Montréal, QC, Canada
| | - R Couture
- From the, Département de Pharmacologie et Physiologie, Faculté de Médecine, Université de Montréal, Montréal, QC, Canada
| | - T Eichwald
- Departamento de Bioquímica, Centro de Ciências Biológicas, Universidade Federal de Santa Catarina, Florianópolis, Brazil
| | - A Latini
- Departamento de Bioquímica, Centro de Ciências Biológicas, Universidade Federal de Santa Catarina, Florianópolis, Brazil
| | - R D Prediger
- Departamento de Farmacologia Centro de Ciências Biológicas, Universidade Federal de Santa Catarina, Florianópolis, Brazil
| | - M Rangachari
- Axe Neurosciences, Centre de recherche du CHU, Université Laval, Québec, QC, Canada.,Département de Médecine Moléculaire, Faculté de Médecine, Université Laval, Québec, QC, Canada
| | - C R Seehus
- FM Kirby Neurobiology Center, Children's Hospital, Boston, MA, USA
| | - S L Foster
- Depression Clinical Research Program, Massachusetts General Hospital, Boston, MA, USA
| | - S Talbot
- From the, Département de Pharmacologie et Physiologie, Faculté de Médecine, Université de Montréal, Montréal, QC, Canada
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8
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Diaz-Manera J, Fernandez-Torron R, LLauger J, James MK, Mayhew A, Smith FE, Moore UR, Blamire AM, Carlier PG, Rufibach L, Mittal P, Eagle M, Jacobs M, Hodgson T, Wallace D, Ward L, Smith M, Stramare R, Rampado A, Sato N, Tamaru T, Harwick B, Rico Gala S, Turk S, Coppenrath EM, Foster G, Bendahan D, Le Fur Y, Fricke ST, Otero H, Foster SL, Peduto A, Sawyer AM, Hilsden H, Lochmuller H, Grieben U, Spuler S, Tesi Rocha C, Day JW, Jones KJ, Bharucha-Goebel DX, Salort-Campana E, Harms M, Pestronk A, Krause S, Schreiber-Katz O, Walter MC, Paradas C, Hogrel JY, Stojkovic T, Takeda S, Mori-Yoshimura M, Bravver E, Sparks S, Bello L, Semplicini C, Pegoraro E, Mendell JR, Bushby K, Straub V. Muscle MRI in patients with dysferlinopathy: pattern recognition and implications for clinical trials. J Neurol Neurosurg Psychiatry 2018; 89:1071-1081. [PMID: 29735511 PMCID: PMC6166612 DOI: 10.1136/jnnp-2017-317488] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [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: 10/19/2017] [Revised: 03/02/2018] [Accepted: 03/26/2018] [Indexed: 11/08/2022]
Abstract
BACKGROUND AND OBJECTIVE Dysferlinopathies are a group of muscle disorders caused by mutations in the DYSF gene. Previous muscle imaging studies describe a selective pattern of muscle involvement in smaller patient cohorts, but a large imaging study across the entire spectrum of the dysferlinopathies had not been performed and previous imaging findings were not correlated with functional tests. METHODS We present cross-sectional T1-weighted muscle MRI data from 182 patients with genetically confirmed dysferlinopathies. We have analysed the pattern of muscles involved in the disease using hierarchical analysis and presented it as heatmaps. Results of the MRI scans have been correlated with relevant functional tests for each region of the body analysed. RESULTS In 181 of the 182 patients scanned, we observed muscle pathology on T1-weighted images, with the gastrocnemius medialis and the soleus being the most commonly affected muscles. A similar pattern of involvement was identified in most patients regardless of their clinical presentation. Increased muscle pathology on MRI correlated positively with disease duration and functional impairment. CONCLUSIONS The information generated by this study is of high diagnostic value and important for clinical trial development. We have been able to describe a pattern that can be considered as characteristic of dysferlinopathy. We have defined the natural history of the disease from a radiological point of view. These results enabled the identification of the most relevant regions of interest for quantitative MRI in longitudinal studies, such as clinical trials. CLINICAL TRIAL REGISTRATION NCT01676077.
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Affiliation(s)
- Jordi Diaz-Manera
- Centro de Investigación Biomédica en Red en Enfermedades Raras (CIBERER), Barcelona, Spain.,Neuromuscular Disorders Unit, Neurology Department, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
| | - Roberto Fernandez-Torron
- Neuromuscular Area, Biodonostia Health Research Institute, Neurology Service, Donostia University Hospital, Donostia-San Sebastian, Spain.,The John Walton Muscular Dystrophy Research Centre, MRC Centre for Neuromuscular Diseases, Newcastle upon Tyne, UK
| | - Jaume LLauger
- Radiology Department, Universitat Autònoma de Barcelona, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
| | - Meredith K James
- The John Walton Muscular Dystrophy Research Centre, MRC Centre for Neuromuscular Diseases, Newcastle upon Tyne, UK
| | - Anna Mayhew
- The John Walton Muscular Dystrophy Research Centre, MRC Centre for Neuromuscular Diseases, Newcastle upon Tyne, UK
| | - Fiona E Smith
- Magnetic Resonance Centre, Institute for Cellular Medicine, Newcastle University, Newcastle upon Tyne, UK
| | - Ursula R Moore
- The John Walton Muscular Dystrophy Research Centre, MRC Centre for Neuromuscular Diseases, Newcastle upon Tyne, UK
| | - Andrew M Blamire
- Magnetic Resonance Centre, Institute for Cellular Medicine, Newcastle University, Newcastle upon Tyne, UK
| | - Pierre G Carlier
- AIM & CEA NMR Laboratory, Institute of Myology, Pitié-Salpêtrière University Hospital, Paris, France
| | | | | | - Michelle Eagle
- The John Walton Muscular Dystrophy Research Centre, MRC Centre for Neuromuscular Diseases, Newcastle upon Tyne, UK
| | - Marni Jacobs
- Center for Translational Science, Division of Biostatistics and Study Methodology, Children's National Health System, Washington, District of Columbia, USA.,Department of Pediatrics, Epidemiology and Biostatistics, George Washington University, Washington, District of Columbia, USA
| | - Tim Hodgson
- Magnetic Resonance Centre, Institute for Cellular Medicine, Newcastle University, Newcastle upon Tyne, UK
| | - Dorothy Wallace
- Magnetic Resonance Centre, Institute for Cellular Medicine, Newcastle University, Newcastle upon Tyne, UK
| | - Louise Ward
- Magnetic Resonance Centre, Institute for Cellular Medicine, Newcastle University, Newcastle upon Tyne, UK
| | - Mark Smith
- Department of Radiology, Nationwide Children's Hospital, Columbus, Ohio, USA
| | - Roberto Stramare
- Radiology Unit, Department of Medicine, University of Padova, Padova, Italy
| | - Alessandro Rampado
- Radiology Unit, Department of Medicine, University of Padova, Padova, Italy
| | - Noriko Sato
- Department of Radiology, National Center Hospital, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Takeshi Tamaru
- Department of Radiology, National Center Hospital, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Bruce Harwick
- Department of Radiology, CMC Mercy Charlotte, Carolinas Healthcare System Neurosciences Institute, Charlotte, North Carolina, USA
| | - Susana Rico Gala
- Department of Radiology, Hospital U. Virgen de Valme, Sevilla, Spain
| | - Suna Turk
- AIM & CEA NMR Laboratory, Institute of Myology, Pitié-Salpêtrière University Hospital, Paris, France
| | - Eva M Coppenrath
- Department of Clinical Radiology, Ludwig-Maximilians-University, Munich, Germany
| | - Glenn Foster
- Center for Clinical Imaging Research CCIR, Washington University, St. Louis, Missouri, USA
| | - David Bendahan
- Centre de Résonance, Magnétique Biologique et Médicale, Marseille, France.,Aix-Marseille Université, Marseille, France
| | | | - Stanley T Fricke
- Department of Diagnostic Imaging and Radiology, Children's National Health System, Washington, District of Columbia, USA
| | - Hansel Otero
- Department of Diagnostic Imaging and Radiology, Children's National Health System, Washington, District of Columbia, USA
| | - Sheryl L Foster
- Department of Radiology, Westmead Hospital, Westmead, New South Wales, Australia.,Faculty of Health Sciences, University of Sydney, Sydney, Australia
| | - Anthony Peduto
- Department of Radiology, Westmead Hospital, Westmead, New South Wales, Australia.,Faculty of Health Sciences, University of Sydney, Sydney, Australia
| | - Anne Marie Sawyer
- Lucas Center for Imaging, Stanford University School of Medicine, Stanford, California, USA
| | - Heather Hilsden
- The John Walton Muscular Dystrophy Research Centre, MRC Centre for Neuromuscular Diseases, Newcastle upon Tyne, UK
| | - Hanns Lochmuller
- The John Walton Muscular Dystrophy Research Centre, MRC Centre for Neuromuscular Diseases, Newcastle upon Tyne, UK
| | - Ulrike Grieben
- Charite Muscle Research Unit, Experimental and Clinical Research Center, A Joint Co-operation of the Charité Medical Faculty and the Max Delbrück Center for Molecular Medicine, Berlin, Germany
| | - Simone Spuler
- Charite Muscle Research Unit, Experimental and Clinical Research Center, A Joint Co-operation of the Charité Medical Faculty and the Max Delbrück Center for Molecular Medicine, Berlin, Germany
| | - Carolina Tesi Rocha
- Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford, California, USA
| | - John W Day
- Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford, California, USA
| | - Kristi J Jones
- Institute for Neuroscience and Muscle Research, Children's Hospital at Westmead, University of Sydney, Sydney, New South Wales, Australia
| | - Diana X Bharucha-Goebel
- Department of Neurology, Children's National Health System, Washington, District of Columbia, USA.,National Institutes of Health (NINDS), Bethesda, Maryland, USA
| | | | - Matthew Harms
- Department of Neurology, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Alan Pestronk
- Department of Neurology, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Sabine Krause
- Friedrich-Baur-Institute, Department of Neurology, Ludwig-Maximilians-University of Munich, Munich, Germany
| | - Olivia Schreiber-Katz
- Friedrich-Baur-Institute, Department of Neurology, Ludwig-Maximilians-University of Munich, Munich, Germany
| | - Maggie C Walter
- Friedrich-Baur-Institute, Department of Neurology, Ludwig-Maximilians-University of Munich, Munich, Germany
| | - Carmen Paradas
- Neuromuscular Unit, Department of Neurology, Hospital U. Virgen del Rocío/Instituto de Biomedicina de Sevilla, Sevilla, Spain
| | - Jean-Yves Hogrel
- Institut de Myologie, AP-HP, G.H. Pitié-Salpêtrière, Paris, Île-de-France, France
| | - Tanya Stojkovic
- Institut de Myologie, AP-HP, G.H. Pitié-Salpêtrière, Paris, Île-de-France, France
| | - Shin'ichi Takeda
- Department of Neurology, National Center Hospital, National Center of Neurology and Psychiatry, Kodaira, Tokyo, Japan
| | - Madoka Mori-Yoshimura
- Department of Neurology, National Center Hospital, National Center of Neurology and Psychiatry, Kodaira, Tokyo, Japan
| | - Elena Bravver
- Neurosciences Institute, Carolinas Healthcare System, Charlotte, North Carolina, USA
| | - Susan Sparks
- Neurosciences Institute, Carolinas Healthcare System, Charlotte, North Carolina, USA
| | - Luca Bello
- Department of Neurosciences, University of Padova, Padova, Italy
| | | | - Elena Pegoraro
- Department of Neurosciences, University of Padova, Padova, Italy
| | | | - Kate Bushby
- The John Walton Muscular Dystrophy Research Centre, MRC Centre for Neuromuscular Diseases, Newcastle upon Tyne, UK
| | - Volker Straub
- The John Walton Muscular Dystrophy Research Centre, MRC Centre for Neuromuscular Diseases, Newcastle upon Tyne, UK
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A Breukelaar I, Williams LM, Antees C, Grieve SM, Foster SL, Gomes L, Korgaonkar MS. Cognitive ability is associated with changes in the functional organization of the cognitive control brain network. Hum Brain Mapp 2018; 39:5028-5038. [PMID: 30136345 DOI: 10.1002/hbm.24342] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Revised: 07/23/2018] [Accepted: 07/23/2018] [Indexed: 01/25/2023] Open
Abstract
Cognitive control is one of the most important skills in day-to-day social and intellectual functioning but we are yet to understand the neural basis of the group of behaviors required to carry this out. Here, we probed changes over time in the brain network associated with cognitive control (the dorsolateral prefrontal cortex, the dorsal posterior parietal cortex, and the dorsal anterior cingulate cortex) using both behavioral assays and functional brain imaging during a selective working memory task in 69 healthy participants within the age range 18-38 years (mean: 25, SD: ±6), assessed twice, 2 years apart. We aimed to explore the relationship of changing network activation and connectivity with behavioral tasks associated with cognitive control in this otherwise neurodevelopmentally stable group. We found that increased connectivity between frontoparietal cognitive control network regions during the working memory task was associated with improved memory and executive functions over the 2-year period and that this association was not impacted by age, gender, or baseline performance. These results provide evidence that changes in the functional organization of the cognitive control brain network occur despite the absence of neurodevelopment, aging or targeted cognitive training effects, and could modulate cognitive performance in early to mid-adulthood. Understanding how and why this change is occurring could provide insights into the mechanisms through which cognitive control ability is cultivated over time. This could aid in the development of interventions in cases where cognitive control is impaired.
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Affiliation(s)
- Isabella A Breukelaar
- Brain Dynamics Centre, The Westmead Institute for Medical Research, The University of Sydney, Westmead, New South Wales, Australia
| | - Leanne M Williams
- Brain Dynamics Centre, The Westmead Institute for Medical Research, The University of Sydney, Westmead, New South Wales, Australia.,Psychiatry and Behavioral Sciences, Stanford University, Stanford, California.,VA Palo Alto (Sierra-Pacific MIRECC), Palo Alto, California
| | - Cassandra Antees
- Brain Dynamics Centre, The Westmead Institute for Medical Research, The University of Sydney, Westmead, New South Wales, Australia
| | - Stuart M Grieve
- Brain Dynamics Centre, The Westmead Institute for Medical Research, The University of Sydney, Westmead, New South Wales, Australia.,Sydney Translational Imaging Laboratory, Heart Research Institute, Charles Perkins Centre and Sydney Medical School, University of Sydney, New South Wales, Australia.,Department of Radiology, Royal Prince Alfred Hospital, Camperdown, New South Wales, Australia
| | - Sheryl L Foster
- Department of Radiology, Westmead Hospital, Westmead, New South Wales, Australia.,Faculty of Health Science, The Discipline of Medical Radiation Sciences, The University of Sydney, New South Wales, Australia
| | - Lavier Gomes
- Department of Radiology, Westmead Hospital, Westmead, New South Wales, Australia
| | - Mayuresh S Korgaonkar
- Brain Dynamics Centre, The Westmead Institute for Medical Research, The University of Sydney, Westmead, New South Wales, Australia.,Discipline of Psychiatry, Sydney Medical School, Westmead, Sydney, Australia
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10
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Kozlowska K, Griffiths KR, Foster SL, Linton J, Williams LM, Korgaonkar MS. Grey matter abnormalities in children and adolescents with functional neurological symptom disorder. Neuroimage Clin 2017; 15:306-314. [PMID: 28560155 PMCID: PMC5440356 DOI: 10.1016/j.nicl.2017.04.028] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/26/2017] [Revised: 03/28/2017] [Accepted: 04/12/2017] [Indexed: 11/18/2022]
Abstract
Objective Functional neurological symptom disorder refers to the presence of neurological symptoms not explained by neurological disease. Although this disorder is presumed to reflect abnormal function of the brain, recent studies in adults show neuroanatomical abnormalities in brain structure. These structural brain abnormalities have been presumed to reflect long-term adaptations to the disorder, and it is unknown whether child and adolescent patients, with illness that is typically of shorter duration, show similar deficits or have normal brain structure. Method High-resolution, three-dimensional T1-weighted magnetic resonance images (MRIs) were acquired in 25 patients (aged 10–18 years) and 24 healthy controls. Structure was quantified in terms of grey matter volume using voxel-based morphometry. Post hoc, we examined whether regions of structural difference related to a measure of motor readiness to emotional signals and to clinical measures of illness duration, illness severity, and anxiety/depression. Results Patients showed greater volumes in the left supplementary motor area (SMA) and right superior temporal gyrus (STG) and dorsomedial prefrontal cortex (DMPFC) (corrected p < 0.05). Previous studies of adult patients have also reported alterations of the SMA. Greater SMA volumes correlated with faster reaction times in identifying emotions but not with clinical measures. Conclusions The SMA, STG, and DMPFC are known to be involved in the perception of emotion and the modulation of motor responses. These larger volumes may reflect the early expression of an experience-dependent plasticity process associated with increased vigilance to others' emotional states and enhanced motor readiness to organize self-protectively in the context of the long-standing relational stress that is characteristic of this disorder. We used high-resolution MRI to investigate brain structure in children presenting with acute functional neurological symptom disorder (FND). Patients had multiple antecedent stressors, a long-standing history of relational stress and at-risk attachment strategies. Patients had greater volumes in the SMA—where motor-, cognitive-, and emotion-processing signals interact to influence motor function. FND may involve experience-dependent changes in brain structure alongside experience-dependent changes in brain function.
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Affiliation(s)
- Kasia Kozlowska
- The Children's Hospital at Westmead, Psychological Medicine, Locked Bag 4001, Westmead, NSW 2145, Australia; The Brain Dynamics Centre, Westmead Institute for Medical Research, 176 Hawkesbury Rd, Westmead, NSW 2145, Australia; The University of Sydney, Sydney, Australia.
| | - Kristi R Griffiths
- The Brain Dynamics Centre, Westmead Institute for Medical Research, 176 Hawkesbury Rd, Westmead, NSW 2145, Australia; The University of Sydney, Sydney, Australia.
| | - Sheryl L Foster
- The University of Sydney, Sydney, Australia; Westmead Hospital Radiology Department, Darcy Rd, Westmead, NSW 2145, Australia.
| | - James Linton
- The Brain Dynamics Centre, Westmead Institute for Medical Research, 176 Hawkesbury Rd, Westmead, NSW 2145, Australia.
| | - Leanne M Williams
- Psychiatry and Behavioral Sciences, Stanford University, VA Palo Alto (Sierra-Pacific MIRECC) 401 Quarry Rd, United States.
| | - Mayuresh S Korgaonkar
- The Brain Dynamics Centre, Westmead Institute for Medical Research, 176 Hawkesbury Rd, Westmead, NSW 2145, Australia; The University of Sydney, Sydney, Australia.
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11
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Breukelaar IA, Antees C, Grieve SM, Foster SL, Gomes L, Williams LM, Korgaonkar MS. Cognitive control network anatomy correlates with neurocognitive behavior: A longitudinal study. Hum Brain Mapp 2016; 38:631-643. [PMID: 27623046 PMCID: PMC5347905 DOI: 10.1002/hbm.23401] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Revised: 08/05/2016] [Accepted: 08/30/2016] [Indexed: 01/31/2023] Open
Abstract
Cognitive control is the process of employing executive functions, such as attention, planning or working memory, to guide appropriate behaviors in order to achieve a specific goal. Functional magnetic resonance imaging studies suggest a superordinate cognitive control network, comprising the dorsal regions of the lateral prefrontal cortex (DLPFC), anterior cingulate cortex (dACC) and parietal cortex (DPC). How gray matter structure changes across this network throughout neurodevelopment and how these changes impact cognitive control are not yet fully understood. Here we investigate changes in gray matter volume of the key nodes of the cognitive control network using structural MRI scans from 176 participants aged 8-38 years. One hundred and eleven of these also completed a longitudinal follow-up at two years. We compare these with performance on a cognitive battery also measured at these two time points. We found that volume decreases in the cognitive control network were associated with improved performance in executive function (in left DLPFC and bilateral DPC), information processing (in bilateral dACC and right DPC) and emotion identification tasks (left DLPFC). These results were significant after controlling for age. Furthermore, gray matter changes were coordinated across the network. These findings imply age-independent synaptic pruning in the cognitive control network may have a role in improving performance in cognitive domains. This study provides insight into the direct impact of structural changes on behavior within this network during neurodevelopment and provides a normative evidence base to better understand development of cognitive dysfunction in brain disorders. Hum Brain Mapp 38:631-643, 2017. © 2016 The Authors Human Brain Mapping Published by Wiley Periodicals, Inc.
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Affiliation(s)
- Isabella A Breukelaar
- Brain Dynamics Centre, The Westmead Institute for Medical Research, The University of Sydney, Westmead, Sydney, Australia
| | - Cassandra Antees
- Brain Dynamics Centre, The Westmead Institute for Medical Research, The University of Sydney, Westmead, Sydney, Australia
| | - Stuart M Grieve
- Brain Dynamics Centre, The Westmead Institute for Medical Research, The University of Sydney, Westmead, Sydney, Australia.,Sydney Translational Imaging Laboratory, Heart Research Institute, Charles Perkins Centre and Sydney Medical School, University of Sydney, NSW, Australia.,Department of Radiology, Royal Prince Alfred Hospital, Camperdown, NSW, Australia
| | - Sheryl L Foster
- Department of Radiology, Westmead Hospital, Westmead, NSW, Australia.,The Discipline of Medical Radiation Sciences, Faculty of Health Science, The University of Sydney, NSW, Australia
| | - Lavier Gomes
- Department of Radiology, Westmead Hospital, Westmead, NSW, Australia
| | - Leanne M Williams
- Brain Dynamics Centre, The Westmead Institute for Medical Research, The University of Sydney, Westmead, Sydney, Australia.,Psychiatry and Behavioral Sciences, Stanford University, Stanford, California.,MIRECC, Palo Alto VA, Palo Alto, California
| | - Mayuresh S Korgaonkar
- Brain Dynamics Centre, The Westmead Institute for Medical Research, The University of Sydney, Westmead, Sydney, Australia.,Discipline of Psychiatry, Sydney Medical School, Westmead, Sydney, Australia
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12
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Cromer MS, Foster SL, Bourne RM, Fransen M, Fulton R, Wang SC. Use of 3T MRI and an unspoiled 3D fast gradient echo sequence for porcine knee cartilage volumetry: Preliminary findings. J Magn Reson Imaging 2013; 38:245-50. [DOI: 10.1002/jmri.23898] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2012] [Accepted: 09/18/2012] [Indexed: 11/08/2022] Open
Affiliation(s)
| | | | - Roger M. Bourne
- Discipline of Medical Radiation Sciences; Faculty of Health Sciences; University of Sydney; Sydney; Australia
| | - Marlene Fransen
- Clinical and Rehabilitation Sciences Research Group; Faculty of Health Sciences; University of Sydney; Sydney; Australia
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13
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Rangan GK, Schwensen KG, Foster SL, Korgaonkar MS, Peduto A, Harris DC. Chronic effects of dietary vitamin D deficiency without increased calcium supplementation on the progression of experimental polycystic kidney disease. Am J Physiol Renal Physiol 2013; 305:F574-82. [PMID: 23698116 DOI: 10.1152/ajprenal.00411.2012] [Citation(s) in RCA: 12] [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] [Indexed: 11/22/2022] Open
Abstract
Increasing evidence indicates that vitamin D deficiency exacerbates chronic kidney injury, but its effects on renal enlargement in polycystic kidney disease (PKD) are not known. In this study, male Lewis polycystic kidney disease (LPK) rats received a normal diet (ND; AIN-93G) supplemented with or without cholecalciferol (vitamin D-deficient diet, VDD; both 0.5% calcium), commenced at either postnatal week 3 (until weeks 10-20; study 1) or from week 10 (until week 20; study 2). Levels of 25-hydroxy vitamin D were reduced in groups receiving the VDD (12 ± 1 nmol/l vs. 116 ± 5 in ND; P < 0.001). In study 1, food intake and weight gain increased by ∼25% in LPK rats receiving the VDD ad libitum, and at week 20 this was associated with a mild reduction in the corrected serum calcium (SCa(2+), 7.4%) and TKW:BW ratio (8.8%), and exacerbation of proteinuria (87%) and hypertension (19%; all P < 0.05 vs. ND). When LPK rats were pair-fed for weeks 3-10, there was a further reduction in the SCa(2+) (25%) and TKW:BW ratio (22%) in the VDD group (P < 0.05 vs. ND). In study 2, the VDD did not alter food intake and body weight, reduced SCa(2+) (7.7%), worsened proteinuria (41.9%), interstitial monocyte accumulation (26.4%), renal dysfunction (21.4%), and cardiac enlargement (13.2%, all P < 0.05), but there was a trend for a reduction in the TKW:BW ratio (13%, P = 0.09). These data suggest that chronic vitamin D deficiency has adverse long-term actions on proteinuria, interstitial inflammation, renal function, and cardiovascular disease in PKD, and these negate its mild inhibitory effect on kidney enlargement.
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Affiliation(s)
- Gopala K Rangan
- Centre for Transplant and Renal Research, Level 2, Clinical Sciences Block, Westmead Hospital, Cnr Bridge and Darcy Rds., Westmead, NSW, Australia 2145.
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14
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Oates EC, Payne JM, Foster SL, Clarke NF, North KN. Young Australian adults with NF1 have poor access to health care, high complication rates, and limited disease knowledge. Am J Med Genet A 2013; 161A:659-66. [DOI: 10.1002/ajmg.a.35840] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2012] [Accepted: 12/04/2012] [Indexed: 11/09/2022]
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Abstract
Recent interest in children's social competence has been prompted by findings of correlational and retrospective studies that indicate a positive relationship between early social adjustment problems of children and their adjustment later in life. To date, the assessment methodology in the area has pursued two directions: (1) sociometric measures (peer nomination and peer rating scales), which have provided the major means of identifying the socially competent child, and (2) direct observation, principally employed in the specification of socially competent behaviors. The current uses and the inherent assets and limitations of both strategies are discussed along with suggestions for enhancing current data collection methods. Issues concerning the definition of social competence, generalizability of current findings, and social norms are also examined.
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16
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Camicioli RM, Korzan JR, Foster SL, Fisher NJ, Emery DJ, Bastos AC, Hanstock CC. Posterior cingulate metabolic changes occur in Parkinson's disease patients without dementia. Neurosci Lett 2004; 354:177-80. [PMID: 14700725 DOI: 10.1016/j.neulet.2003.09.076] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The basis for cognitive deficits in Parkinson's disease (PD) is unknown. Hippocampal atrophy has been shown in Alzheimer's disease (AD) and PD. N-Acetyl aspartate (NAA)/creatine (Cr) ratio in the posterior cingulate gyrus (PCG) is decreased in AD, but unknown in PD. Volumetric magnetic resonance (MR) imaging (at 1.5 T) determined corrected HC volume and MR spectroscopy (MRS) PCG metabolites in 12 non-demented mild to moderately affected PD patients (six male, six female) and ten controls (five male, five female). Age (PD=60.6 years, control=62.2; P=0.62), education (PD=14.1 years, controls=13.8; P=0.89) and global cognition (Mini-Mental State Exam score: PD=28.7, controls=29.6; P=0.14) did not differ. Only recall (CVLT-II, P=0.046) and NAA/Cr (PD=1.53, controls=1.78; P=0.03) were decreased in PD. Memory correlated with NAA/Cr (r=0.65, P=0.02) in PD. In conclusion, cingulate metabolic changes occur in PD.
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Affiliation(s)
- R M Camicioli
- Department of Medicine (Neurology Division), Room E-223, Glenrose Rehabilitation Hospital, 10230-111th Avenue, University of Alberta, Edmonton, AB, Canada T5G 0B7.
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17
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Abstract
The special section on analogue behavioral observation (ABO) provided an in-depth review of various ABO assessment procedures. Despite their availability, however, these procedures are rarely used in clinical practice. This may result in part from the traditions on which most ABO assessments are based, from distinctions between clinical and research assessment environments, and from the need for more information about the cost-effectiveness of ABO strategies for meeting specific needs of clinicians in applied settings. Suggestions for bridging the research-clinical gap involve investigating more thoroughly when ABO does and does not provide useful information for various purposes in applied settings and increasing accessibility and cost-effectiveness of ABO procedures for practitioners.
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Affiliation(s)
- E J Mash
- Department of Psychology, University of Calgary, 2500 University Drive N.W., Calgary, Alberta T2N 1N4, Canada.
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18
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Foster SL, Richardson SH, Failla ML. Elevated iron status increases bacterial invasion and survival and alters cytokine/chemokine mRNA expression in Caco-2 human intestinal cells. J Nutr 2001; 131:1452-8. [PMID: 11340099 DOI: 10.1093/jn/131.5.1452] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.4] [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: 11/12/2022] Open
Abstract
Iron status affects both microbial growth and immune function. Mammalian iron homeostasis is maintained primarily by regulating the absorption of the micronutrient in the proximal small intestine. The iron concentration of the enterocyte can fluctuate widely in response to both dietary and whole body iron status, as well as in response to infections. The possibility that an enterocyte with an elevated iron concentration is more susceptible to invasion by enteric pathogens is not known. Therefore, we examined the impact of enterocyte iron status on the invasion and survival of an enteric pathogen, as well as on the levels of several cytokine and chemokine mRNAs by the host cell. The enterocyte-like Caco-2 human intestinal cell line and Salmonella enteritidis served as the models to examine the effect of iron on the host-parasite interaction. Iron status of Caco-2 cells was altered by incubation in serum-free medium supplemented with varying levels of iron. Elevated iron status of Caco-2 cells increased the efficiency of the invasion and the number of bacteria surviving in the intracellular environment. Caco-2 cells constitutively expressed transforming growth factor-beta1, interleukin-8, monocyte chemotactic protein-1, tumor necrosis factor-alpha and interleukin-1beta, and infection with S. enteritidis increased the relative quantities of all cytokine/chemokine mRNAs except interleukin-1beta. Elevated iron status of Caco-2 cells decreased the levels of cytokine/chemokine mRNAs by 25-45% in uninfected cells. In contrast, bacterial infection was associated with a 21-95% increase in cytokine/chemokine mRNAs levels in Caco-2 cells with higher iron concentration compared with infected cells with lower iron concentration. These data support the hypothesis that elevated enterocyte iron status increases susceptibility to infection and exacerbates the mucosal inflammatory response initiated by microbial invasion by increasing cytokine/chemokine expression.
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Affiliation(s)
- S L Foster
- Department of Nutrition and Foodservice Systems, The University of North Carolina at Greensboro, Greensboro, North Carolina 27402, USA
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19
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Syms MJ, Foster SL. Bezold's abscess. Mil Med 2001; 166:354-5. [PMID: 11315480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023] Open
Affiliation(s)
- M J Syms
- Tripler Army Medical Center, Honolulu, HI 96859-5000, USA
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20
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Abstract
The special section on analogue behavioral observation (ABO) provided an in-depth review of various ABO assessment procedures. Despite their availability, however, these procedures are rarely used in clinical practice. This may result in part from the traditions on which most ABO assessments are based, from distinctions between clinical and research assessment environments, and from the need for more information about the cost-effectiveness of ABO strategies for meeting specific needs of clinicians in applied settings. Suggestions for bridging the research-clinical gap involve investigating more thoroughly when ABO does and does not provide useful information for various purposes in applied settings and increasing accessibility and cost-effectiveness of ABO procedures for practitioners.
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Affiliation(s)
- E J Mash
- Department of Psychology, University of Calgary, 2500 University Drive N.W., Calgary, Alberta T2N 1N4, Canada.
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21
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Andrews JA, Foster SL, Capaldi D, Hops H. Adolescent and family predictors of physical aggression, communication, and satisfaction in young adult couples: a prospective analysis. J Consult Clin Psychol 2000. [PMID: 10780119 DOI: 10.1037//0022-006x.68.2.195] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
This study tested a model wherein the family conflict, depression, and antisocial behavior of 254 adolescents (mean age = 17 years; 63% female) are prospectively related to functioning within a marital (51%) or dating relationship in young adulthood (mean age = 23 years). Family aversive communication in adolescence and adolescent antisocial behavior predicted couple physical aggression. Family aversive communication predicted dyadic satisfaction and aversive couple communication for married women and dating men. Among those with partners who reported little antisocial behavior, adolescent antisocial behavior inversely predicted couple satisfaction and facilitative behavior. Partner antisocial behavior did not mediate the relation between adolescent characteristics and couple functioning. Findings emphasize the importance of the early family environment and psychopathology of the adolescent in the development of adaptive couple relationships.
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Affiliation(s)
- J A Andrews
- Oregon Research Institute, Eugene 97403-1983, USA.
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22
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Andrews JA, Foster SL, Capaldi D, Hops H. Adolescent and family predictors of physical aggression, communication, and satisfaction in young adult couples: a prospective analysis. J Consult Clin Psychol 2000; 68:195-208. [PMID: 10780119 PMCID: PMC9070545 DOI: 10.1037/0022-006x.68.2.195] [Citation(s) in RCA: 84] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
This study tested a model wherein the family conflict, depression, and antisocial behavior of 254 adolescents (mean age = 17 years; 63% female) are prospectively related to functioning within a marital (51%) or dating relationship in young adulthood (mean age = 23 years). Family aversive communication in adolescence and adolescent antisocial behavior predicted couple physical aggression. Family aversive communication predicted dyadic satisfaction and aversive couple communication for married women and dating men. Among those with partners who reported little antisocial behavior, adolescent antisocial behavior inversely predicted couple satisfaction and facilitative behavior. Partner antisocial behavior did not mediate the relation between adolescent characteristics and couple functioning. Findings emphasize the importance of the early family environment and psychopathology of the adolescent in the development of adaptive couple relationships.
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Affiliation(s)
- J A Andrews
- Oregon Research Institute, Eugene 97403-1983, USA.
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23
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Abstract
Social validity is a term coined by behavior analysts to refer to the social importance and acceptability of treatment goals, procedures, and outcomes. This article discusses dimensions of social validity, methods used to evaluate various aspects of social validity, and the applicability of these concepts and methods in clinical treatment research.
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Affiliation(s)
- S L Foster
- California School of Professional Psychology-San Diego 92121, USA.
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24
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Abstract
Social validity is a term coined by behavior analysts to refer to the social importance and acceptability of treatment goals, procedures, and outcomes. This article discusses dimensions of social validity, methods used to evaluate various aspects of social validity, and the applicability of these concepts and methods in clinical treatment research.
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Affiliation(s)
- S L Foster
- California School of Professional Psychology-San Diego 92121, USA.
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25
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Peduto AJ, Frawley KJ, Bellemore MC, Kuo RS, Foster SL, Onikul E. MR imaging of dysplasia epiphysealis hemimelica: bony and soft-tissue abnormalities. AJR Am J Roentgenol 1999; 172:819-23. [PMID: 10063889 DOI: 10.2214/ajr.172.3.10063889] [Citation(s) in RCA: 33] [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: 12/28/2022]
Abstract
OBJECTIVE The purpose of this study is to describe the bony and, to our knowledge, previously unreported associated soft-tissue abnormalities seen on MR imaging of dysplasia epiphysealis hemimelica. CONCLUSION MR imaging accurately depicted bony and cartilagenous structural abnormalities in multiple planes and revealed previously undescribed secondary changes in menisci, tendons, ligaments, and muscle. MR imaging is of value in the assessment of patients with this disorder.
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Affiliation(s)
- A J Peduto
- Department of Radiology, The New Children's Hospital, Westmead, New South Wales, Australia
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26
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Foster SL, Smith EB. Patient consultation in a managed care setting: guiding pharmacy into the future. Am J Manag Care 1998; 4:1039-46; quiz 1047-8. [PMID: 10181993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Abstract
Managed care organizations are excellent environments for pharmaceutical care programs to demonstrate their impact on patient care outcomes and to decrease costs. Patient consultation is the cornerstone in implementing pharmaceutical care because it increases patient contact with the pharmacists while improving patient compliance with drug therapy (adherence). Implementation of a patient consultation program that verifies patients' understanding of their disease and therapy gives the pharmacist information necessary to monitor drug therapy. Use of strategic planning to overcome barriers, followed by the development of local standards of practice, will refocus the practice philosophy to one of improving patient outcomes. Pharmacy managers must demonstrate and document the value that patient consultation brings to the patient and the healthcare system. Then, they must integrate their counseling effort with other health education efforts of the managed care system. Pharmacists will gain the support of other disciplines by reinforcing their efforts. Together they can work to decrease the problems that are inherent with drug therapy. These goals can be accomplished with minimal expense and have the potential to produce significant savings in healthcare costs.
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Affiliation(s)
- S L Foster
- University of Tennessee College of Pharmacy, Memphis, TN 38163, USA
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27
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Affiliation(s)
- S L Foster
- Indian Health Service (IHS), Pharmacy Practice Training Program, Clinical Support Center, Phoenix, Ariz 85016, USA
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28
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Abstract
This article reviews current strategies for assessing social skills with peers in childhood, highlighting contemporary unresolved issues in identifying children who need intervention, selecting target behaviors, and assessing treatment outcome. Sociometric measures of peer acceptance are also considered. Although many current measures of social skills have adequate evidence of reliability and convergent validity, assessment could benefit from (a) increased documentation that the content of measures assesses important skills in relating to peers, (b) improved methods for assessing social behavior in specific interpersonal situations, and (c) more empirical evidence that indirect assessment methods (self-report, peer assessment, and teacher report) and analogue observations reflect in vivo behavior.
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Affiliation(s)
- S L Foster
- California School of Professional Psychology, San Diego 92121
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29
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Abstract
The convergent validity of the two most frequently used methods for assessing violent offending in juveniles (i.e., self-reports and arrests) was evaluated. Participants were 87 serious juvenile offenders and their maternal figures, primarily from disadvantaged families. Validation measures tapped established behavioral, family, and peer correlates of delinquency. Results failed to support the ability of either arrests for violent crimes or self-reported violent offenses to index violent criminal behavior accurately. Several methodological features of the study support our hypothesis that the findings were not spurious. Procedural and conceptual implications of the findings are discussed.
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Affiliation(s)
- S W Henggeler
- Department of Psychiatry and Behavioral Sciences, Medical University of South Carolina, Charleston 29425-0742
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30
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Guevremont DC, Foster SL. Impact of social problem-solving training on aggressive boys: skill acquisition, behavior change, and generalization. J Abnorm Child Psychol 1993; 21:13-27. [PMID: 8463502 DOI: 10.1007/bf00910486] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [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: 01/30/2023]
Abstract
This study examined the impact of social problem-solving training on the behavior of five aggressive boys. Acquisition of problem-solving skills and changes in classroom behavior were evaluated using multiple-baseline designs within and across subjects. A generalization-programming procedure to promote the use of problem-solving skills in the natural environment was introduced across children in multiple-baseline fashion. Direct observation and behavior ratings were used to evaluate the treatment. Results indicated that each subject acquired the problem-solving skills at levels comparable to well-adjusted peers. Only one child showed behavioral improvement coincident with problem-solving skill acquisition. Three others showed moderate behavior change after the generalization-programming procedure was introduced. Only one child's gains on teacher ratings were maintained at the 6-month followup. The results suggest that cognitive-behavioral treatment of childrens' aggressive behavior may produce changes of limited magnitude and durability.
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Affiliation(s)
- D C Guevremont
- University of Massachusetts Medical Center, Worcester 01655
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31
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Abstract
The hypothesis is experimentally examined that a positive behavioral repertoire can ameliorate the negative social impact of aggressive behavior. Sixty-six fourth- through sixth-grade girls viewed and rated a series of videotaped interactions between two female confederates. The proportion of positive to aggressive behavior viewed by each subject was manipulated across six experimental conditions by varying the number of positive behaviors exhibited by one of the confederates (target) while the number of aggressive behaviors displayed by her remained constant (i.e., 0%, 20%, 43%, 60%, 80%, and 100% positive). Each subject provided sociometric ratings of the target and selected trait descriptors that best described her from a checklist. The results indicated that positive behavior exhibited in high rates (80% or more, compared to aggressive behavior) offset the negative effects of aggression on both sociometric ratings and positive and negative descriptors.
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32
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Hodson KE, Ryan ME, Judy M, Foster SL. Team management: an alternative to acting directorship. Nurse Educ 1990; 15:29-33. [PMID: 2377327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
A sudden absence of leadership due to unexpected illness, death, or resignation can seriously weaken an organization. Orderly administrative transition was believed to be necessary by those confronting a sudden leadership void. A team management administrative approach was proposed in response to an urgent and complex problem. Results of an evaluation of the team at the end of 1 year of leadership are presented. Team management is documented as a viable alternative to a one person acting director in an academic setting.
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33
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Willis LM, Foster SL. Differences in children's peer sociometric and attribution ratings due to context and type of aggressive behavior. J Abnorm Child Psychol 1990; 18:199-215. [PMID: 2189923 DOI: 10.1007/bf00910731] [Citation(s) in RCA: 12] [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: 12/30/2022]
Abstract
Sociometric and attribution (internality and responsibility) ratings of boys performing different kinds of aggression (hostile and instrumental hitting and pushing) and of neutral behavior occurring in two contexts (provoked and unprovoked) were investigated in an analogue fashion. Thirty fifth- and sixth-grade boys viewed and rated 12 brief videotaped scenes of two unfamiliar male peers interacting, presented in one of six random orders. Provoked aggression resulted in less dislike, less worthiness of punishment, and greater attribution to external causes than unprovoked aggression. Instrumental and hostile aggression produced lower liking ratings and were viewed as more deserving of punishment than neutral behavior but did not differ from each other. Results support distinctions between provoked and unprovoked aggression but not between hostile and instrumental aggression, at least in terms of their functional impact on peer judgements.
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Affiliation(s)
- L M Willis
- Department of Psychology, West Virginia University, Morgantown 26506-6040
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34
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Pisko EJ, Skipper ER, Foster SL, Panetti M, Challa VR, Geisinger KR, Wainer RA, Poehling GG, White RE, Turner RA. Decreased production of suppressive-B-cell factor by synovial membrane B-lymphocytes in rheumatoid arthritis. Clin Exp Rheumatol 1988; 6:239-45. [PMID: 3263239] [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: 01/05/2023]
Abstract
Suppressive-B-cell factor (SBF) is an autoregulatory B-cell lymphokine produced by heat-aggregated-IgG stimulated B-lymphocytes which suppresses polyclonal immunoglobulin production. SBF production by rheumatoid arthritis (RA) patients' peripheral blood B-lymphocytes inversely correlates with disease activity and in vitro rheumatoid factor production. To further define the role of SBF in the pathogenesis of RA, the present study measured SBF production by surgically-obtained synovial membrane mononuclear leukocytes. SBF production by RA synovial leukocytes was similar to the levels previously described for RA peripheral blood leukocytes. Both RA and osteoarthritis (OA) synovial leukocytes produced significantly less SBF than leukocytes obtained from otherwise healthy patients with plica. OA patients produced less SBF than RA patients, but the difference was not statistically significant. SBF values for combined RA patients and controls with OA or plica correlated with the degree of histological plasma cell infiltration providing further evidence for SBF production by cells of the B-lymphocyte lineage. Depletion studies also demonstrated that synovial SBF was produced by B-lymphocytes. The molecular weight (34,000) of synovial SBF was similar to the molecular weight of peripheral blood SBF. Decreased SBF production by RA synovial B-lymphocytes is a functional abnormality in RA which may contribute to the perpetuation of synovial rheumatoid factor production and chronic synovial inflammation.
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Affiliation(s)
- E J Pisko
- Department of Medicine, Bowman Gray School of Medicine, Wake Forest University, Winston-Salem, NC 27103
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35
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Goodman LA, Pisko EJ, Foster SL, Turner RA, Panetti M, Semble EL. Analysis of combined rheumatoid factor determinations by the rheumatoid arthritis latex and sheep cell agglutination tests and the American Rheumatism Association criteria for rheumatoid arthritis. J Rheumatol 1987; 14:234-9. [PMID: 3598993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The clinical records of randomly selected patients receiving both the sheep cell agglutination test (SCAT) and the latex agglutination test (RA latex) for rheumatoid factor (RF) were analyzed for the presence of American Rheumatism Association (ARA) criteria for rheumatoid arthritis (RA). When both tests were positive there was a 3-fold increase compared to only one test positive in the relative risk that a patient met ARA criteria for RA, and there was a 2-fold increase in the probability that a patient with 2 positive tests had classical RA compared to only a positive RA latex. The occurrence of RF reactive with both human and rabbit IgG identifies a population of patients likely to have more ARA criteria for RA and classical disease.
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36
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White RE, Pisko EJ, Foster SL, Panetti M, Turner RA. Decreased suppressive B cell factor (SBF) in rheumatoid arthritis: evidence for a defect in B cell autoregulation. The Journal of Immunology 1986. [DOI: 10.4049/jimmunol.136.6.2151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Abstract
Rheumatoid arthritis (RA) is a disorder characterized by defective immunoregulation. Hypergammaglobulinemia, circulating immune complexes (IC), and autoantibodies such as rheumatoid factor (RF) are common serum abnormalities. To assess IC-mediated feedback suppression in RA, we evaluated the ability of a suppressive B cell factor (SBF) generated by culturing heat-aggregated IgG (HAIgG) with peripheral blood mononuclear leukocytes (PBL) from patients with RA and normal controls to suppress the pokeweed mitogen (PWM)-induced RF plaque-forming cell (PFC) response of normal PBL. RA patients generated less SBF than age-matched controls. Background suppression (supernatants obtained from PBL cultured without HAIgG) was similar in the RA patients and age-matched controls. To determine the effects of nonsteroidal antiinflammatory drug (NSAID) therapy on suppression, RA patients and age-matched controls were studied before and after NSAID therapy. NSAID therapy significantly reduced background suppression in RA patients who were not on immunosuppressive drugs and in age-matched controls, but there was no effect on SBF in RA patients or controls. There was a small increase in background suppression when NSAID were administered to RA patients on immunosuppressives, suggesting an ameliorative effect of NSAID in this group of patients, which tended to increase their level of suppression when compared with RA patients only on NSAID. Spontaneous RF-PFC were measured in normal controls and RA patients and were compared with suppressor activity. There were increased numbers of spontaneous RF-PFC in RA patients. Total suppressor activity was greatest in young adult controls, who also had the least RF-PFC. The percentage of suppression correlated inversely with the number of RF-PFC in patients and controls. Additionally, disease activity in RA as measured by total joint count and erythrocyte sedimentation rate (ESR) was shown to correlate inversely with total suppressor activity. We conclude that the PBL from patients with RA produce decreased SBF after HAIgG stimulation and that loss of suppression is also associated with aging. This study suggests a defect in IC-stimulated B cell suppressor activity in RA leading to decreased ability to suppress antibody and further IC formation. The combination of increased RF-PFC and decreased SBF suggests that there is defective B cell autoregulation in RA, which may be involved in the pathogenesis and chronicity of this disease.
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37
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Pisko EJ, Foster SL, White RE, Panetti M, Turner RA. Suppression of a pokeweed mitogen-stimulated plaque-forming cell response by a human B lymphocyte-derived aggregated IgG-stimulated suppressor factor: suppressive B cell factor (SBF). J Immunol 1986; 136:2141-50. [PMID: 2419423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The mechanisms whereby formed immune complexes (IC) or immunoglobulin aggregates can suppress further antibody production were explored by culturing normal human peripheral blood mononuclear leukocytes (PBL) with heat-aggregated IgG (HAIgG) and collecting the culture supernatants at 24 hr. These supernatants were found to suppress a pokeweed mitogen (PWM)-induced rheumatoid factor plaque-forming cell (RF-PFC) response in normal individuals. PWM-induced anti-trinitrophenylated sheep red blood cell (TNP-SRBC) PFC were also inhibited by suppressor supernatants from HAIgG-stimulated PBL, suggesting that the polyclonal PFC response was inhibited by a suppressor factor. The suppressor factor inhibited PWM stimulated RF-PFC throughout the culture period, but suppression was maximal at the peak of the RF-PFC response. Suppressor factor was only effective at the initiation of cultures, suggesting that it inhibited early events in the PWM-stimulated RF-PFC response. Molecular weight determination of the suppressor factor by differential membrane fractionation suggested a m.w. range of 30,000 to 50,000, and chromatography on Sephadex G-100 showed a peak activity at an approximate m.w. of 32,000. Studies suggested the factor was not an interferon. Depletion of T lymphocytes by E rosetting and macrophages/monocytes by G-10 adherence did not affect the generation of suppressor factor. Depletion of T lymphocytes (OKT4, OKT8) and NK cells (Leu-11b) by antibody-dependent, complement-mediated cytotoxicity also did not affect the generation of suppressor factor. Depletion of B lymphocytes with OKB7 resulted in the generation of significantly less suppressor factor. Suppression produced by unstimulated purified B lymphocytes was approximately one-half that seen when B lymphocytes were stimulated with HAIgG. Differential membrane fractionation studies suggested that only HAIgG-stimulated B cell cultures contained peak activity in the 30,000 to 50,000 m.w. fraction. Supernatants from unstimulated purified T cells also generated suppression, which was approximately one-half of that seen with HAIgG-stimulated B cells, but no increase in suppressor activity was seen in T cell cultures after incubation with HAIgG. These studies demonstrate that HAIgG is capable of stimulating B lymphocytes to produce a lymphokine, suppressive B cell factor (SBF), which is capable of suppressing a polyclonal PFC response. SBF may be important in feedback control of human immunoglobulin production.
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38
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White RE, Pisko EJ, Foster SL, Panetti M, Turner RA. Decreased suppressive B cell factor (SBF) in rheumatoid arthritis: evidence for a defect in B cell autoregulation. J Immunol 1986; 136:2151-7. [PMID: 3485142] [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: 01/06/2023]
Abstract
Rheumatoid arthritis (RA) is a disorder characterized by defective immunoregulation. Hypergammaglobulinemia, circulating immune complexes (IC), and autoantibodies such as rheumatoid factor (RF) are common serum abnormalities. To assess IC-mediated feedback suppression in RA, we evaluated the ability of a suppressive B cell factor (SBF) generated by culturing heat-aggregated IgG (HAIgG) with peripheral blood mononuclear leukocytes (PBL) from patients with RA and normal controls to suppress the pokeweed mitogen (PWM)-induced RF plaque-forming cell (PFC) response of normal PBL. RA patients generated less SBF than age-matched controls. Background suppression (supernatants obtained from PBL cultured without HAIgG) was similar in the RA patients and age-matched controls. To determine the effects of nonsteroidal antiinflammatory drug (NSAID) therapy on suppression, RA patients and age-matched controls were studied before and after NSAID therapy. NSAID therapy significantly reduced background suppression in RA patients who were not on immunosuppressive drugs and in age-matched controls, but there was no effect on SBF in RA patients or controls. There was a small increase in background suppression when NSAID were administered to RA patients on immunosuppressives, suggesting an ameliorative effect of NSAID in this group of patients, which tended to increase their level of suppression when compared with RA patients only on NSAID. Spontaneous RF-PFC were measured in normal controls and RA patients and were compared with suppressor activity. There were increased numbers of spontaneous RF-PFC in RA patients. Total suppressor activity was greatest in young adult controls, who also had the least RF-PFC. The percentage of suppression correlated inversely with the number of RF-PFC in patients and controls. Additionally, disease activity in RA as measured by total joint count and erythrocyte sedimentation rate (ESR) was shown to correlate inversely with total suppressor activity. We conclude that the PBL from patients with RA produce decreased SBF after HAIgG stimulation and that loss of suppression is also associated with aging. This study suggests a defect in IC-stimulated B cell suppressor activity in RA leading to decreased ability to suppress antibody and further IC formation. The combination of increased RF-PFC and decreased SBF suggests that there is defective B cell autoregulation in RA, which may be involved in the pathogenesis and chronicity of this disease.
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39
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Pisko EJ, Foster SL, White RE, Panetti M, Turner RA. Suppression of a pokeweed mitogen-stimulated plaque-forming cell response by a human B lymphocyte-derived aggregated IgG-stimulated suppressor factor: suppressive B cell factor (SBF). The Journal of Immunology 1986. [DOI: 10.4049/jimmunol.136.6.2141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Abstract
The mechanisms whereby formed immune complexes (IC) or immunoglobulin aggregates can suppress further antibody production were explored by culturing normal human peripheral blood mononuclear leukocytes (PBL) with heat-aggregated IgG (HAIgG) and collecting the culture supernatants at 24 hr. These supernatants were found to suppress a pokeweed mitogen (PWM)-induced rheumatoid factor plaque-forming cell (RF-PFC) response in normal individuals. PWM-induced anti-trinitrophenylated sheep red blood cell (TNP-SRBC) PFC were also inhibited by suppressor supernatants from HAIgG-stimulated PBL, suggesting that the polyclonal PFC response was inhibited by a suppressor factor. The suppressor factor inhibited PWM stimulated RF-PFC throughout the culture period, but suppression was maximal at the peak of the RF-PFC response. Suppressor factor was only effective at the initiation of cultures, suggesting that it inhibited early events in the PWM-stimulated RF-PFC response. Molecular weight determination of the suppressor factor by differential membrane fractionation suggested a m.w. range of 30,000 to 50,000, and chromatography on Sephadex G-100 showed a peak activity at an approximate m.w. of 32,000. Studies suggested the factor was not an interferon. Depletion of T lymphocytes by E rosetting and macrophages/monocytes by G-10 adherence did not affect the generation of suppressor factor. Depletion of T lymphocytes (OKT4, OKT8) and NK cells (Leu-11b) by antibody-dependent, complement-mediated cytotoxicity also did not affect the generation of suppressor factor. Depletion of B lymphocytes with OKB7 resulted in the generation of significantly less suppressor factor. Suppression produced by unstimulated purified B lymphocytes was approximately one-half that seen when B lymphocytes were stimulated with HAIgG. Differential membrane fractionation studies suggested that only HAIgG-stimulated B cell cultures contained peak activity in the 30,000 to 50,000 m.w. fraction. Supernatants from unstimulated purified T cells also generated suppression, which was approximately one-half of that seen with HAIgG-stimulated B cells, but no increase in suppressor activity was seen in T cell cultures after incubation with HAIgG. These studies demonstrate that HAIgG is capable of stimulating B lymphocytes to produce a lymphokine, suppressive B cell factor (SBF), which is capable of suppressing a polyclonal PFC response. SBF may be important in feedback control of human immunoglobulin production.
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40
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Pisko EJ, Turner RA, Panetti M, Foster SL, Heise E. Spontaneous and aggregated IgG induced rheumatoid factor producing cells in rheumatoid arthritis. Rheumatol Int 1985; 5:155-61. [PMID: 2931794 DOI: 10.1007/bf00541516] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Seropositive rheumatoid arthritis (RA) patients were found to have high numbers of spontaneously occurring cells making rheumatoid factor (RF) reactive with human IgG as measured by a RF plaque forming cell (RF-PFC) assay. There was a significant positive correlation between the number of RF-PFC and both disease activity measured by the sedimentation rate and RF titer measured by the RA latex test. Aggregated IgG and pokeweed mitogen were equally effective stimulators of RF-PFC in cultures of RA peripheral blood mononuclear leukocytes. The rheumatoid ratio of helper (T4): suppressor (T8) T lymphocytes was also significantly increased over the ratio of normal controls, but this ratio did not correlate with the number of RF-PFC. Aggregated IgG or immune complexes may be responsible for stimulating RA RF-PFC in vivo.
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Jackson M, Kimmins CS, Young CM, Scarpino L, Foster SL. A product report: Osto-Zyme as an odor eliminator. J Surg Oncol 1983; 23:81-2. [PMID: 6855245 DOI: 10.1002/jso.2930230206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
A product, Osto-Zyme, was clinically tested at our Institute for the elimination of odor. Thirteen clients were chosen by enterostomal therapists to be tested. The product was sprayed directly into pouch, peristomal skin, and into night drainage units. This product proved very effective in the elimination of odor. The manufacturer of Osto-Zyme is the Richard C. Shelton Co., Wright Brothers Branch, Dayton, Ohio.
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Turner RA, Pisko EJ, Agudelo CA, Counts GB, Foster SL, Treadway WJ. Uric acid effects on in vitro models of rheumatoid inflammatory and autoimmune processes. Ann Rheum Dis 1983; 42:338-42. [PMID: 6859966 PMCID: PMC1001143 DOI: 10.1136/ard.42.3.338] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
A neutrophil monolayer system was used to study the effects of uric acid on neutrophil-aggregate interactions important in rheumatoid inflammation. No effect on immunoglobulin G aggregate phagocytosis was seen, but hyperuricaemic levels of uric acid were associated with an enhancement of phagocytosis-induced release of the azurophilic granular enzyme beta-glucuronidase. A trinitrophenyl-coupled mononuclear leucocyte rheumatoid factor plaque-forming assay was utilised to study uric acid effects on polyclonal activation of immunocompetent cells. Low levels of uric acid enhanced and high levels suppressed this system. Hyperuricaemia may enhance some aspects of rheumatoid inflammation, while uric acid may modulate an important component of rheumatoid autoimmunity.
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Pisko EJ, Panetti M, Foster SL, Turner RA. Human rheumatoid factor-producing cell induction by 2-mercaptoethanol: immunomodulation by a simple thiol compound. Int J Immunopharmacol 1983; 5:163-71. [PMID: 6874169 DOI: 10.1016/0192-0561(83)90009-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Two-mercaptoethanol (2-ME), a simple 2 carbon thiol compound with a wide variety of in vitro and in vivo immunomodulating effects, was evaluated for its usefulness as a molecular probe of human antibody producing cell activation by adding 2-ME to cultures of peripheral blood mononuclear leukocytes from normal human volunteers. Culturing normal human leukocytes with 2-ME induced a significant number of cells producing rheumatoid factor as measured by a hemolytic plaque forming cell (PFC) assay. Dose response studies revealed 5 X 10(-5)M to be the optimum concentration of 2-ME for the induction of rheumatoid factor plaque forming cells (RF-PFC). This concentration of 2-ME also maximally induced PFC making antibodies to sheep red cells coupled to the trinitrophenyl (TNP) hapten demonstrating that 2-ME is a polyclonal inducer of human PFC. The addition of 5 X 10(-5) M 2-ME to cultures containing maximal concentrations of the polyclonal stimulators, pokeweed mitogen and human heat-aggregrated IgG, increased the number of RF-PFC detected in these cultures by approximately 50%, although both lower and higher concentrations of 2-ME suppressed the RF-PFC response. We conclude that 2-ME induces normal human leukocytes to produce rheumatoid factor as part of a polyclonal activation of antibody producing cells. 2-ME also has immunomodulating effects when added to other polyclonal stimulators of antibody producing cells.
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Pisko EJ, Turner RA, Soderstrom LP, Panetti M, Foster SL, Treadway WJ. Inhibition of neutrophil phagocytosis and enzyme release by hyaluronic acid. Clin Exp Rheumatol 1983; 1:41-4. [PMID: 6681123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Hyaluronic acid at a concentration found in normal joints (4 mg/ml) inhibited the uptake of aggregated IgG by human peripheral blood polymorphonuclear leukocytes, but concentrations of hyaluronic acid found in inflammatory joints (1 mg/ml) did not. Similarly, hyaluronic acid at 4 mg/ml, but not 1 mg/ml, inhibited the release of lysozyme from aggregated IgG stimulated polymorphonuclear leukocytes. beta-Glucuronidase release was inhibited by both concentrations of hyaluronic acid. Physiological concentrations of hyaluronic acid inhibit this model system for the fluid phase of rheumatoid arthritis and hyaluronic acid may be an important immunomodulating substance in the rheumatoid joint.
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Pisko EJ, Foster SL, Turner RA. Induction of autoantibody-producing cells after the coculture of haptenated and normal human mononuclear leukocytes. Proc Soc Exp Biol Med 1981; 168:131-6. [PMID: 7033965 DOI: 10.3181/00379727-168-41247] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
The coculture of normal human peripheral blood mononuclear leukocytes (PBL) and autologous mononuclear leukocytes coupled to the trinitrophenyl (TNP) hapten (TNP-PBL) was found to induce a polyclonal activation of antibody-producing cells. The polyclonal activation of antibody-producing cells was demonstrated by detecting the induction of cells producing antibody to sheep red blood cells using a complement-dependent, direct, hemolytic plaque-forming cell (PFC) assay. A ratio of four normal to one haptenated mononuclear leukocyte was found to be optimal for inducing the polyclonal activation of antibody-producing cell in these cultures. The plaque-forming cells assay in these experiments utilized monolayers of indicator red cells. Further evidence for the polyclonal induction of antibody-producing cells by TNP-PBL was provided by demonstrating PFC on monolayers of not only sheep red blood cells, but also autologous human red cells, bromelain-treated autologous red cells, TNP-coupled human and sheep red cells, and human autologous red cells coupled to human heat-aggregated IgG with chromic chloride. Thus cells secreting antibody to TNP, human red cells, and human IgG were induced. Anti-IgG and anti-human red cell-producing cells were first detected on Day 2 of culture and were still present on Day 9. Mononuclear leukocytes altered by chemical haptenation polyclonally stimulate normal mononuclear leukocytes to become antibody-producing cells. This polyclonal stimulation of antibody-producing cells includes cells producing antibodies to human IgG and human autologous red blood cells suggesting that autoantibody-producing cells are induced.
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King N, Gripper J, Hallam EW, Foster SL, Walsby JW, Gunn SD, Carter D. Pet health insurances and contract services: the potential for practice involvement. Vet Rec 1979; 104:494-5. [PMID: 483538 DOI: 10.1136/vr.104.22.494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Pet medical insurance has appreciable advantages and the existing policies appear to provide a beneficial service. But administrative costs of the small premiums involved make it of doubtful commercial attraction or benefit to the client. However, practice contract service schemes reduce administrative costs and can provide many of the advantages of insurance. Such a scheme is described. A coordinating agency outside the practice to produce promotional material, contracts, formulae for setting premiums and exclusions and to act as an arbitration agency for disputes could be established given the demand.
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Abstract
Ninety-nine teachers participated in a survey designed to assess teacher attitudes toward and experience with a variety of strategies for dealing with conduct problem children in regular classes. Results indicated that (a) a majority of teachers favored placing conduct problem children in regular rather than special classes; (b) current sources of assistance (school psychologists, clinical psychologists, principals, parents, and other teachers) were uniformly perceived as only slightly affective in helping teachers handle problem children; and (c) of 14 alternative educational and psychological assistance delivery strategies, teachers most frequently preferred smaller classes, teacher aides, increased counseling staff, and resource classrooms.
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Ford JD, Foster SL. Letter: Extrinsic incentives and token-based programs. A reevaluation. Am Psychol 1976. [PMID: 1247208 DOI: 10.1037//0003-066x.31.1.87] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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