1
|
Bø R, Kraft B, Jonassen R, Pedersen ML, Harmer CJ, Landrø NI. The long-term effects of ABM on symptom severity in patients with recurrent depression: A randomized sham-controlled trial. J Affect Disord 2023; 340:886-892. [PMID: 37579884 DOI: 10.1016/j.jad.2023.08.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 06/29/2023] [Accepted: 08/03/2023] [Indexed: 08/16/2023]
Abstract
BACKGROUND The present study reports on long-term outcomes of ABM over one year in self-reported and clinician-rated depression symptoms, anxiety symptoms, and relapse rates. METHODS We conducted a double-blind randomized sham-controlled trial in 301 participants with recurrent major depression disorder between January 2015 and October 2016 (#NCT02658682). Participants were allocated to ABM or sham condition twice daily for 14 consecutive days. Long-term effects of ABM were assessed by BDI-II, HDRS and BAI at one-, six-, and 12-months follow-up. Relapse rates at 12-months follow-up were also assessed. RESULTS There was no long-term effect of ABM (as compared to sham) on clinician-rated depression symptoms, on anxiety symptoms, nor in relapse rates. By 12 months follow-up, there was a small effect on self-reported depression favoring ABM over sham. LIMITATIONS The lack of an assessment-only condition hinders comparison to natural trajectories of depression symptoms. CONCLUSIONS The overall long-term effect of ABM was limited, and currently there is no convincing evidence for implementing this as a viable treatment option in clinical populations. We speculate if the sham condition should be replaced by another control condition when investigating the clinical utility of ABM.
Collapse
Affiliation(s)
- Ragnhild Bø
- Clinical Neuroscience Research Group, Department of Psychology, University of Oslo, Norway.
| | - Brage Kraft
- Clinical Neuroscience Research Group, Department of Psychology, University of Oslo, Norway; Division of Psychiatry, Diakonhjemmet Hospital, Norway
| | - Rune Jonassen
- Faculty of Health Sciences, Oslo Metropolitan University, Norway
| | - Mads Lund Pedersen
- Department of Psychology, University of Oslo, Norway; NORMENT, Division of Mental Health and Addiction, Oslo University Hospital & Institute of Clinical Medicine, University of Oslo, Norway
| | - Catherine J Harmer
- Clinical Neuroscience Research Group, Department of Psychology, University of Oslo, Norway; Department of Psychiatry, Oxford University, United Kingdom; Oxford Health NHS Foundation Trust, Warneford Hospital, Oxford, OX3 7JX, United Kingdom
| | - Nils Inge Landrø
- Clinical Neuroscience Research Group, Department of Psychology, University of Oslo, Norway; Division of Psychiatry, Diakonhjemmet Hospital, Norway
| |
Collapse
|
2
|
Bø R, Kraft B, Pedersen ML, Joormann J, Jonassen R, Osnes K, Harmer CJ, Landrø NI. The effect of attention bias modification on depressive symptoms in a comorbid sample: a randomized controlled trial. Psychol Med 2023; 53:6389-6396. [PMID: 36617964 PMCID: PMC10520597 DOI: 10.1017/s0033291722003956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Revised: 11/11/2022] [Accepted: 12/16/2022] [Indexed: 01/10/2023]
Abstract
BACKGROUND Studies investigating the long-term effect of attention bias modification (ABM) in clinical samples are lacking. This study investigates the 6-months follow-up effect of ABM on depressive symptoms in participant with major depressive disorder with and without comorbid disorders. METHODS We conducted a double-blind randomized sham-controlled trial in 101 participants between 19 November 2019, and 17 August 2021. Follow-up ended 3 April 2022. Participants were allocated to ABM or sham condition twice daily for 14 consecutive days. Primary outcomes were the total score on the Beck Depression Inventory-II (BDI-II) at 6 months, mean Brief State Rumination Inventory (BSRI) score post-treatment and reduction in BSRI post-treatment. Secondary outcome was change in attentional bias (AB). The trial was preregistered in ClinicalTrials.gov (#NCT04137367). RESULTS A total of 118 patients aged 18-65 years were assessed for eligibility, and 101 were randomized and subjected to intention-to-treat analyses. At 6 months, ABM had no effect on depression and anxiety compared to a sham condition. While rumination decreased during the intervention, there was no effect of condition on rumination and AB. Predictor analysis did not reveal differences between participants with ongoing major depressive episode or comorbid anxiety. CONCLUSION Compared to sham training, there was no effect of ABM on depressive symptoms at 6-months follow-up. Since the intervention failed at modifying AB, it is unclear whether changes in AB are related to long-term outcomes.
Collapse
Affiliation(s)
- Ragnhild Bø
- Clinical Neuroscience Research Group, Department of Psychology, University of Oslo, Oslo, Norway
| | - Brage Kraft
- Clinical Neuroscience Research Group, Department of Psychology, University of Oslo, Oslo, Norway
- Division of Psychiatry, Diakonhjemmet Hospital, Oslo, Norway
| | - Mads Lund Pedersen
- Department of Psychology, University of Oslo, Oslo, Norway
- NORMENT, Division of Mental Health and Addiction, Oslo University Hospital & Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | - Jutta Joormann
- Affect Regulation and Cognition Lab, Yale University, USA
| | - Rune Jonassen
- Faculty of Health Sciences, Oslo Metropolitan University, Norway
| | - Kåre Osnes
- Division of Psychiatry, Diakonhjemmet Hospital, Oslo, Norway
| | - Catherine J. Harmer
- Clinical Neuroscience Research Group, Department of Psychology, University of Oslo, Oslo, Norway
- Department of Psychiatry, Oxford University, UK
- Oxford Health NHS Foundation Trust, Warneford Hospital, Oxford, OX3 7JX
| | - Nils Inge Landrø
- Clinical Neuroscience Research Group, Department of Psychology, University of Oslo, Oslo, Norway
- Division of Psychiatry, Diakonhjemmet Hospital, Oslo, Norway
| |
Collapse
|
3
|
Ulrichsen KM, Kolskår KK, Richard G, Pedersen ML, Alnaes D, Dørum ES, Sanders AM, Tornås S, Maglanoc LA, Engvig A, Ihle-Hansen H, Nordvik JE, Westlye LT. No add-on effect of tDCS on fatigue and depression in chronic stroke patients: A randomized sham-controlled trial combining tDCS with computerized cognitive training. Brain Behav 2022; 12:e2643. [PMID: 35666655 PMCID: PMC9304833 DOI: 10.1002/brb3.2643] [Citation(s) in RCA: 5] [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] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Revised: 05/10/2022] [Accepted: 05/11/2022] [Indexed: 01/30/2023] Open
Abstract
BACKGROUND Fatigue and emotional distress rank high among self-reported unmet needs in life after stroke. Transcranial direct current stimulation (tDCS) may have the potential to alleviate these symptoms for some patients, but the acceptability and effects for chronic stroke survivors need to be explored in randomized controlled trials. METHODS Using a randomized sham-controlled parallel design, we evaluated whether six sessions of 1 mA tDCS (anodal over F3, cathodal over O2) combined with computerized cognitive training reduced self-reported symptoms of fatigue and depression. Among the 74 chronic stroke patients enrolled at baseline, 54 patients completed the intervention. Measures of fatigue and depression were collected at five time points spanning a 2 months period. RESULTS While symptoms of fatigue and depression were reduced during the course of the intervention, Bayesian analyses provided evidence for no added beneficial effect of tDCS. Less severe baseline symptoms were associated with higher performance improvement in select cognitive tasks, and study withdrawal was higher in patients with more fatigue and younger age. Time-resolved symptom analyses by a network approach suggested higher centrality of fatigue items (except item 1 and 2) than depression items. CONCLUSION The results reveal no add-on effect of tDCS on fatigue or depression but support the notion of fatigue as a relevant clinical symptom with possible implications for treatment adherence and response.
Collapse
Affiliation(s)
- Kristine M Ulrichsen
- NORMENT, Division of Mental Health and Addiction, Oslo University Hospital & Institute of Clinical Medicine, University of Oslo, Oslo, Norway.,Department of Psychology, University of Oslo, Oslo, Norway.,Sunnaas Rehabilitation Hospital HT, Nesodden, Norway
| | - Knut K Kolskår
- NORMENT, Division of Mental Health and Addiction, Oslo University Hospital & Institute of Clinical Medicine, University of Oslo, Oslo, Norway.,Department of Psychology, University of Oslo, Oslo, Norway.,Sunnaas Rehabilitation Hospital HT, Nesodden, Norway
| | - Geneviève Richard
- NORMENT, Division of Mental Health and Addiction, Oslo University Hospital & Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | - Mads Lund Pedersen
- NORMENT, Division of Mental Health and Addiction, Oslo University Hospital & Institute of Clinical Medicine, University of Oslo, Oslo, Norway.,Department of Psychology, University of Oslo, Oslo, Norway
| | - Dag Alnaes
- NORMENT, Division of Mental Health and Addiction, Oslo University Hospital & Institute of Clinical Medicine, University of Oslo, Oslo, Norway.,Bjørknes College, Oslo, Norway
| | - Erlend S Dørum
- NORMENT, Division of Mental Health and Addiction, Oslo University Hospital & Institute of Clinical Medicine, University of Oslo, Oslo, Norway.,Department of Psychology, University of Oslo, Oslo, Norway.,Sunnaas Rehabilitation Hospital HT, Nesodden, Norway
| | - Anne-Marthe Sanders
- NORMENT, Division of Mental Health and Addiction, Oslo University Hospital & Institute of Clinical Medicine, University of Oslo, Oslo, Norway.,Department of Psychology, University of Oslo, Oslo, Norway.,Sunnaas Rehabilitation Hospital HT, Nesodden, Norway
| | | | - Luigi A Maglanoc
- University Center for Information Technology, University of Oslo, Oslo, Norway
| | - Andreas Engvig
- Department of Medicine, Diakonhjemmet Hospital, Oslo, Norway.,Department of Nephrology, Oslo University Hospital, Oslo, Norway
| | | | | | - Lars T Westlye
- NORMENT, Division of Mental Health and Addiction, Oslo University Hospital & Institute of Clinical Medicine, University of Oslo, Oslo, Norway.,Department of Psychology, University of Oslo, Oslo, Norway.,KG Jebsen Centre for Neurodevelopmental Disorders, University of Oslo, Norway
| |
Collapse
|
4
|
Albertsen N, Riahi S, Pedersen ML, Skovgaard N, Andersen S. The prevalence of atrial fibrillation in Greenland: a register-based cross-sectional study based on disease classifications and prescriptions of oral anticoagulants. Int J Circumpolar Health 2022; 81:2030522. [PMID: 35086441 PMCID: PMC8803055 DOI: 10.1080/22423982.2022.2030522] [Citation(s) in RCA: 2] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Previous studies of the prevalence of atrial fibrillation (AF) in Greenland are based on either single-point electrocardiograms (ECGs) or patients admitted with stroke. This study estimates the prevalence of AF based on disease classifications in the electronic medical record system (EMR) and prescriptions of oral anticoagulants (OACs). Patients given a diagnose classification code for AF or atrial flutter or prescribed the vitamin K antagonist Warfarin or the direct-acting oral anticoagulant Rivaroxaban were identified in the EMR. Descriptive data and selected laboratory values were extracted, and a minimum CHA2DS2-VASc score was calculated for the 790 patients identified in the EMR (66% men). A total prevalence of AF of 1.4% was found in the general population (1.8% among men and 1.0% among women), with a significantly lower prevalence among women younger than 70 years. There was a significant increase in AF-prevalence with advancing age (p<0.001) for both men and women. A minimum CHA2DS2-VASc was estimated and app. 10% of the patients may be undertreated with OACs. The prevalence of AF found in this study is higher than that found in previous studies in Greenland and comparable to the prevalence found in other Western countries, indicating that AF is common in Greenland.
Collapse
Affiliation(s)
- N Albertsen
- Department of Geriatric Medicine, Aalborg University Hospital, Aalborg, Denmark.,Department of Clinical Medicine, University of Aalborg, Aalborg, Denmark.,Arctic Health Research Centre, Aalborg University Hospital, Aalborg, Denmark
| | - S Riahi
- Department of Clinical Medicine, University of Aalborg, Aalborg, Denmark.,Department of Cardiology, Aalborg University Hospital, Aalborg, Denmark
| | - M L Pedersen
- Steno Diabetes Centre, Nuuk, Greenland.,Greenland Centre for Health Research, University of Greenland, Nuuk, Greenland
| | - N Skovgaard
- Greenland Centre for Health Research, University of Greenland, Nuuk, Greenland
| | - S Andersen
- Department of Geriatric Medicine, Aalborg University Hospital, Aalborg, Denmark.,Department of Clinical Medicine, University of Aalborg, Aalborg, Denmark.,Arctic Health Research Centre, Aalborg University Hospital, Aalborg, Denmark.,Greenland Centre for Health Research, University of Greenland, Nuuk, Greenland
| |
Collapse
|
5
|
Ironside M, Amemori KI, McGrath CL, Pedersen ML, Kang MS, Amemori S, Frank MJ, Graybiel AM, Pizzagalli DA. Approach-Avoidance Conflict in Major Depressive Disorder: Congruent Neural Findings in Humans and Nonhuman Primates. Biol Psychiatry 2020; 87:399-408. [PMID: 31672243 PMCID: PMC7007869 DOI: 10.1016/j.biopsych.2019.08.022] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 08/08/2019] [Accepted: 08/10/2019] [Indexed: 12/17/2022]
Abstract
BACKGROUND Maladaptive approach-avoidance behavior has been implicated in the pathophysiology of major depressive disorder (MDD), but the neural basis of these abnormalities in decision making remains unclear. Capitalizing on recent preclinical findings, we adapted an approach-avoidance conflict task from nonhuman primate research for use in human functional magnetic resonance imaging (fMRI). METHODS Forty-two female participants, including 18 unmedicated individuals with current MDD (mean age 25.2 ± 5.1 years) and 24 psychiatrically healthy control subjects (mean age 26.3 ± 7.6 years) completed the adapted approach-avoidance task during fMRI. To probe potential mechanistic factors underlying the observed behavioral and fMRI findings and to inform interpretation of putative group differences, we examined electrophysiological data from 2 female Macaca mulatta monkeys performing the approach-avoidance conflict task mimicked in the fMRI study. RESULTS Findings demonstrated congruent neural correlates of approach-avoidance conflict and aversive responsiveness in the anterior cingulate cortex, including the pregenual cortex, of human subjects and macaques (humans: p < .05 whole-brain corrected; macaques: p < .05). The MDD group exhibited aberrant task-related activations in the anterior cingulate cortex, prefrontal cortex, and striatum (all ps < .05). Neural effects in the MDD group were cross-sectionally associated with stress and depressive symptoms. Importantly, they also prospectively predicted stress at 6-month follow-up (all ps < .05). CONCLUSIONS Findings indicate that there is conservation of anterior cingulate activation across species and that frontal and striatal regions, in unmedicated humans with MDD, are abnormally responsive during cost-benefit decision making. We suggest that these disruptions could be valuable candidates for translational biomarkers.
Collapse
Affiliation(s)
- Maria Ironside
- Center for Depression, Anxiety and Stress Research, McLean Hospital, Belmont, MA 02478, USA,Department of Psychiatry, Harvard Medical School, Boston, MA 02115, USA,These authors contributed equally
| | - Ken-ichi Amemori
- McGovern Institute for Brain Research and Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, USA,The Hakubi Center for Advanced Research and Primate Research Institute, Kyoto University, Aichi 484-8506, Japan,These authors contributed equally
| | - Callie L. McGrath
- Center for Depression, Anxiety and Stress Research, McLean Hospital, Belmont, MA 02478, USA
| | - Mads Lund Pedersen
- Brown Institute for Brain Science, Psychiatry and Human Behavior, Brown University, Providence, USA
| | - Min Su Kang
- Center for Depression, Anxiety and Stress Research, McLean Hospital, Belmont, MA 02478, USA
| | - Satoko Amemori
- McGovern Institute for Brain Research and Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Michael J. Frank
- Brown Institute for Brain Science, Psychiatry and Human Behavior, Brown University, Providence, USA
| | - Ann M. Graybiel
- McGovern Institute for Brain Research and Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Diego A. Pizzagalli
- Center for Depression, Anxiety and Stress Research, McLean Hospital, Belmont, MA 02478, USA,Department of Psychiatry, Harvard Medical School, Boston, MA 02115, USA
| |
Collapse
|
6
|
Backe MB, Pedersen ML. Prevalence, incidence, mortality, and quality of care of diagnosed diabetes in Greenland. Diabetes Res Clin Pract 2020; 160:107991. [PMID: 31877343 DOI: 10.1016/j.diabres.2019.107991] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Revised: 11/28/2019] [Accepted: 12/19/2019] [Indexed: 11/15/2022]
Abstract
AIMS To estimate prevalence, incidence, and mortality of diagnosed diabetes in Greenland, and to evaluate quality of diabetes care among men and women, and patients living in towns and settlements. METHODS This study was designed as an observational cross-sectional study based on review of data obtained from the electronic medical record (EMR) in Greenland. All permanent residents of Greenland registered with a diabetes diagnosis in the EMR (N = 1498) were included. RESULTS The age-standardized prevalence of diabetes was 2.19% as of Nov 30, 2018. The age-standardized incidence was 147 per 100,000 per year and the age-standardized mortality was 62 per 10,000 person-year among people aged ≥0 years old (Dec 1, 2017 to Nov 30, 2018). Quality of diabetes care was slightly higher among women compared to men concerning proportion with annual measurement of glycated haemoglobin (HbA1c) (89.9% vs. 85.8%; p < 0.015), blood pressure (83.7% vs. 76.7%; p < 0.001).The only difference observed in quality of care among settlements and towns was lower proportion tested for microalbuminuria within one year in settlements (50.3% vs. 40.1%; p < 0.001). CONCLUSIONS The age-standardized prevalence of diagnosed diabetes in Greenland was 2.19% and the prevalence of diagnosed diabetes among adults aged ≥20 years was 3.7%. Only minor differences in quality of care related to gender and place of residence were observed. Further improvements in quality of care are warranted.
Collapse
Affiliation(s)
- M B Backe
- Agency of Health and Prevention, Queen Ingrid Hospital, Nuuk, Greenland
| | - M L Pedersen
- Queen Ingrid Primary Health Care Center, Nuuk, Greenland; Greenland Center of Health Research, Institute of Nursing and Health Science, University of Greenland, Nuuk, Greenland.
| |
Collapse
|
7
|
Pedersen ML, Endestad T, Biele G. Evidence Accumulation and Choice Maintenance Are Dissociated in Human Perceptual Decision Making. PLoS One 2015; 10:e0140361. [PMID: 26510176 PMCID: PMC4624809 DOI: 10.1371/journal.pone.0140361] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2015] [Accepted: 09/24/2015] [Indexed: 11/17/2022] Open
Abstract
Perceptual decision making in monkeys relies on decision neurons, which accumulate evidence and maintain choices until a response is given. In humans, several brain regions have been proposed to accumulate evidence, but it is unknown if these regions also maintain choices. To test if accumulator regions in humans also maintain decisions we compared delayed and self-paced responses during a face/house discrimination decision making task. Computational modeling and fMRI results revealed dissociated processes of evidence accumulation and decision maintenance, with potential accumulator activations found in the dorsomedial prefrontal cortex, right inferior frontal gyrus and bilateral insula. Potential maintenance activation spanned the frontal pole, temporal gyri, precuneus and the lateral occipital and frontal orbital cortices. Results of a quantitative reverse inference meta-analysis performed to differentiate the functions associated with the identified regions did not narrow down potential accumulation regions, but suggested that response-maintenance might rely on a verbalization of the response.
Collapse
Affiliation(s)
- Mads Lund Pedersen
- Department of Psychology, University of Oslo, 0317, Oslo, Norway; Intervention Centre, Oslo University Hospital, Rikshospitalet, 0372, Oslo, Norway
| | - Tor Endestad
- Department of Psychology, University of Oslo, 0317, Oslo, Norway
| | - Guido Biele
- Department of Psychology, University of Oslo, 0317, Oslo, Norway; Norwegian Institute of Public Health, 0473, Oslo, Norway
| |
Collapse
|
8
|
Abstract
OBJECTIVE Deficient reward processing has gained attention as an important aspect of ADHD, but little is known about reward-based decision-making (DM) in adults with ADHD. This article summarizes research on DM in adult ADHD and contextualizes DM deficits by comparing them to attention deficits. METHOD Meta-analytic methods were used to calculate average effect sizes for different DM domains and continuous performance task (CPT) measures. RESULTS None of the 59 included studies (DM: 12 studies; CPT: 43; both: 4) had indications of publication bias. DM and CPT measures showed robust, small to medium effects. Large effect sizes were found for a drift diffusion model analysis of the CPT. CONCLUSION The results support the existence of DM deficits in adults with ADHD, which are of similar magnitude as attention deficits. These findings warrant further examination of DM in adults with ADHD to improve the understanding of underlying neurocognitive mechanisms.
Collapse
Affiliation(s)
| | | | | | - Guido Biele
- University of Oslo, Norway Norwegian Institute of Public Health, Oslo, Norway
| |
Collapse
|
9
|
Abstract
AIMS To estimate the prevalence of diagnosed Type 2 diabetes mellitus in Greenland and to evaluate the quality of the diabetes care before and after implementation of a new diabetes programme. METHODS In this observational and cross-sectional study, data from the medical records were collected in Greenland in 2008 and 2010. Information about age, gender, most recently measured HbA(1c) , blood pressure and serum cholesterol and from the examination of eyes, feet and urine was obtained. The prevalence was estimated using the whole adult population in Greenland as background population. The quality of the diabetes care was monitored by six process, three biological and three treatment indicators. A diabetes concept based on national guidelines, systematized recording in an electronic medical record and feedback to the clinics were used to improve diabetes care. RESULTS Four hundred and sixty-five patients were included in the 2008 sample and 691 in the 2010 sample. The total prevalence increased from 2.3 (95% CI 2.1-2.5) % in 2008 to 2.7 (95%CI 2.5-3.0) among Greenlanders aged 40 years old or above, corresponding to an increase of 19% (P = 0.006). All process indicators improved significantly between the two observations. CONCLUSIONS Along with an increasing prevalence of diagnosed Type 2 diabetes, all six process quality indicators increased. It is strongly recommended that focus on the quality of diabetes care in Greenland should be maintained in order to benefit from the programme in the longer term.
Collapse
Affiliation(s)
- M L Pedersen
- Center of Primary Health Care in Nuuk, Nuuk, Greenland
| | | |
Collapse
|
10
|
Pedersen ML. DNA barcode profiling: a new platform for the investigation of genome integrity. Genome Biol 2010. [PMCID: PMC3026260 DOI: 10.1186/gb-2010-11-s1-p30] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Affiliation(s)
- M L Pedersen
- Genomic Expression Inc, Wyoming, DE 19934-4033, USA
| |
Collapse
|
11
|
|
12
|
Nourian Z, Mow T, Muftic D, Burek S, Pedersen ML, Matz J, Mulvany MJ. Orthostatic hypotensive effect of antipsychotic drugs in Wistar rats by in vivo and in vitro studies of alpha1-adrenoceptor function. Psychopharmacology (Berl) 2008; 199:15-27. [PMID: 18542932 DOI: 10.1007/s00213-007-1064-9] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/20/2007] [Accepted: 12/20/2007] [Indexed: 02/02/2023]
Abstract
RATIONALE Many antipsychotics cause orthostatic hypotension possibly due to antagonist action on resistance vessel alpha1A-adrenoceptors (alpha1A-AR). OBJECTIVE We have tested this possibility by determining in Wistar rats how the orthostatic hypotensive effect of several antipsychotic drugs compares with their affinity for adrenoceptors in mesenteric small arteries (MSA with mainly alpha1A-AR) and aorta (mainly alpha1D-AR). MATERIALS AND METHODS Using a tilt setup, orthostatic hypotension was measured in anaesthetized rats for prazosin and the antipsychotics haloperidol, sertindole, risperidone, clozapine, ziprasidone, domperidone, olanzapine, and aripiprazole. For in vitro studies, segments of MSA and aorta were mounted on a wire myograph for isometric tension recording. Cumulative concentration-response curves were constructed to phenylephrine (PE) in the absence and presence of the drugs. Apparent affinity (pA2) was calculated by Schild analysis. RESULTS Prazosin antagonized tilt-induced and PE responses in both studies (threshold 4 ng/ml, pA2 9.52 MSA, 10.1 aorta). The rank order of the potency of the antipsychotics in the tilt experiments correlated (r2 = 0.69, P = 0.01) with the pA2-values in MSA: Risperidone and sertindole had the highest potency in the tilt test (threshold 159 and 97 ng/ml) and the highest apparent affinity in MSA (pA2 8.92 and 8.78), in contrast with aripiprazole and domperidone, which had the lowest in each case (threshold 4.1 and 3.0 microg/ml, pA2 7.17 and 6.99). In aorta, the pA2 values did not correlate with the in vivo potencies; in particular, sertindole had no functional affinity in aorta. CONCLUSION We conclude that the orthostatic hypotensive effect in rats of the antipsychotic drugs investigated is mediated through alpha1A-ARs.
Collapse
Affiliation(s)
- Z Nourian
- Department of Pharmacology, University of Aarhus, University Park 1240, 8000, Aarhus C, Denmark
| | | | | | | | | | | | | |
Collapse
|
13
|
Selenica ML, Jensen HS, Larsen AK, Pedersen ML, Helboe L, Leist M, Lotharius J. Efficacy of small-molecule glycogen synthase kinase-3 inhibitors in the postnatal rat model of tau hyperphosphorylation. Br J Pharmacol 2007; 152:959-79. [PMID: 17906685 PMCID: PMC2078230 DOI: 10.1038/sj.bjp.0707471] [Citation(s) in RCA: 96] [Impact Index Per Article: 5.6] [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: 01/18/2023] Open
Abstract
BACKGROUND AND PURPOSE Glycogen synthase kinase-3 (GSK-3) affects neuropathological events associated with Alzheimeŕs disease (AD) such as hyperphosphorylation of the protein, tau. GSK-3beta expression, enzyme activity and tau phosphorylated at AD-relevant epitopes are elevated in juvenile rodent brains. Here, we assess five GSK-3beta inhibitors and lithium in lowering phosphorylated tau (p-tau) and GSK-3beta enzyme activity levels in 12-day old postnatal rats. EXPERIMENTAL APPROACH Brain levels of inhibitors following treatment in vivo were optimized based on pharmacokinetic data. At optimal doses, p-tau (Ser(396)) levels in brain tissue was measured by immunoblotting and correlated with GSK-3beta enzyme activities in the same tissues. Effects of GSK inhibitors on p-tau, GSK-3beta activities and cell death were measured in a human neuronal cell line (LUHMES). KEY RESULTS Lithium and CHIR98014 reduced tau phosphorylation (Ser(396)) in the cortex and hippocampus of postnatal rats, while Alsterpaullone and SB216763 were effective only in hippocampus. AR-A014418 and Indirubin-3'-monoxime were ineffective in either brain region. Inhibition of p-tau in brain required several-fold higher levels of GSK inhibitors than the IC(50) values obtained in recombinant or cell-based GSK-3beta enzyme activity assays. The inhibitory effect on GSK-3beta activity ex vivo correlated with protection against cell death and decrease of p-tau- in LUHMES cells, using low microM inhibitor concentrations. CONCLUSIONS AND IMPLICATIONS Selective small-molecule inhibitors of GSK-3 reduce tau phosphorylation in vivo. These findings corroborate earlier suggestions that GSK-3beta may be an attractive target for disease-modification in AD and related conditions where tau phosphorylation is believed to contribute to disease pathogenesis.
Collapse
Affiliation(s)
- M-L Selenica
- Division of Biological Research, H Lundbeck A/S Copenhagen, Denmark
| | - H S Jensen
- Division of Biological Research, H Lundbeck A/S Copenhagen, Denmark
| | - A K Larsen
- Division of Clinical Research, Neurology, H Lundbeck A/S Copenhagen, Denmark
| | - M L Pedersen
- Department of Metabolism, H Lundbeck A/S Copenhagen, Denmark
| | - L Helboe
- Division of Biological Research, H Lundbeck A/S Copenhagen, Denmark
| | - M Leist
- Faculty of Biology, University of Konstanz Konstanz, Germany
| | - J Lotharius
- Division of Biological Research, H Lundbeck A/S Copenhagen, Denmark
- Author for correspondence:
| |
Collapse
|
14
|
Huang MJ, Regunathan S, Botta M, Lee K, McClendon E, Yi GB, Pedersen ML, Berkowitz DB, Wang G, Travagli M, Piletz JE. Structure-activity analysis of guanidine group in agmatine for brain agmatinase. Ann N Y Acad Sci 2004; 1009:52-63. [PMID: 15028570 DOI: 10.1196/annals.1304.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
To identify a selective inhibitor of mammalian agmatinase, screening was performed on four analogues of agmatine with modifications directly to the guanidine group, six analogues with modifications to the carbon-amine chain, and one analogue with modifications at both ends of the molecule. Control compounds were aminoguanidine and 7-nitroindazole, known inhibitors of the three isoforms (i, e, n) of nitric oxide synthase (NOS), and arcaine, a known inhibitor of the glutamate NMDA receptor. These compounds were compared for inhibition of rat agmatinase and arginine decarboxylase (ADC) activities. Results were studied by ab initio Hartee-Fock descriptors based on optimized geometries and van der Waals radii. Linear correlations were obtained using various geometric and electronic descriptors of the carbon (C), nitrogen (N), and hydrogen (H) atoms in the guanidine moiety. The best fit equation for percent activity remaining of rat agmatinase was = 0.3225 D + 72.76 D1916 + 64.97 D1920 - 192.58 H21 - 253.09 (r = 0.89), where D is the calculated dipole moment, D1916 and D1920 are the N19-N16 and N19-N20 distances, respectively, and H21 is the charge on H21. This agmatinase equation is distinct from the equations fit for ADC, the three NOS isoforms, and inhibition of NMDA receptor binding.
Collapse
Affiliation(s)
- M-J Huang
- Department of Chemistry, Jackson State University, Jackson, Mississippi 39217, USA.
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
15
|
Brøndum-Nielsen K, Pedersen ML. [Epigenetic modification of the genetic material. Genomic imprinting and its significance for disease in human beings]. Ugeskr Laeger 2001; 163:3218-22. [PMID: 11421188] [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: 04/16/2023]
Abstract
Genomic imprinting is the epigenetic differential marking of maternally and paternally inherited alleles of specific genes or chromosomal subregions during gametogenesis, leading after fertilization to differential expression during development. Expression is thus monoallelic, with one parental allele being expressed, the other silenced. Imprinting implies the existence of a reversible imprinting signal, which is erased in the gonads to be reset according to the sex of the individual. Mutations in imprinted genes are not inherited in a regular Mendelian fashion. The number of identified imprinted genes is now around 35. Three congenital human disorders are known to be caused by errors in the expression pattern of imprinted genes: Prader-Willi syndrome, Angelman syndrome and Beckwith-Wiedemann syndrome. A number of cancers are also caused by errors in imprinted genes.
Collapse
|
16
|
Andersen HE, Pedersen ML, Jørgensen O, Kronvang B. Analysis of the hydrology and flow of nitrogen in 17 Danish catchments. Water Sci Technol 2001; 44:63-68. [PMID: 11724496] [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: 05/23/2023]
Abstract
In the search for tools for evaluating the effects of national action plans combating diffuse nutrient pollution causing eutrophication of surface waters, a study of the nitrogen (N) flow in 17 Danish agricultural catchments was carried out. Data on N input and N harvest for the agricultural year of 1993/1994 was obtained from questionnaire surveys facilitating the set up of N balances. Net export of N from the catchments measured at the outlet was obtained from time-series of stream water chemistry and discharge from 1993-1997. N leaching from the root zone of each field was calculated using an empirical model. A physically based lumped rainfall-runoff model was used for separating the hydrograph time-series into three runoff components: baseflow, interflow and overland flow. Large regional variations in net N input were found ranging from 62 kg N ha(-1) yr(-1) in the loamy eastern part of the country dominated by cereal production to 137 kg N ha(-1) yr(-1) in the western part characterised by less fertile sandy soils and dominated by animal husbandry. N leaching from the root zone showed a corresponding variation with regional averages ranging from 34.5 kg N ha(-1) yr(-1) to 90.9 kg N ha(-1) yr(-1). No similar regional pattern could however be found regarding net N export, and no relationship could be established between net N export and root zone N leaching. This finding was ascribed to a varying and in some catchments very high (>80%) N retention during subsurface transport to the stream. The hydrological modelling revealed that loamy catchments had a high proportion of quick flow (overland flow + interflow), whereas baseflow dominated the sandy catchments. Further, a highly significant relationship between N retention and proportion of quick flow was found emphasising the importance of understanding the hydrological pathways. This should be taken into consideration when evaluating the N loading of surface waters resulting from a given agricultural practice and the effects of possible changes in this practice.
Collapse
Affiliation(s)
- H E Andersen
- National Environmental Research Institute, Department of Streams and Riparian Areas, Silkeborg, Denmark
| | | | | | | |
Collapse
|
17
|
Berkowitz DB, McFadden JM, Smith MK, Pedersen ML. Synthesis of α-Vinyl Amino Acids. Methods Mol Med 1999; 23:467-488. [PMID: 21380914 DOI: 10.1385/0-89603-517-4:467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
This chapter presents procedures for the synthesis of α-vinyl amino acids, in which the usual α-proton is replaced by an unsubstituted vinyl group (Fig. 1). The parent member of this family, α-vinylglycine (R≠H), is a natural product (1,2) and acts as a suicide substrate for a number of PLP-dependent enzymes (4-9). Higher members of this family (R≠H) have also been synthesized (10-12). Several including α-vinyl-m-tyrosine (13-15), α-vinyl-DOPA (13-15), α-vinylglutamate (16), α-vinylornithine (17), α-vinyllysine (18), and α-vinylarginine (18) are Trojan horse inhibitors of their cognate amino acid decarboxylases (AADCs). Such (appropriately labeled) AADC inhibitors may also have potential as reagents for positron emission tomography (19). Fig. 1. Generic structure for α-vinyl amino acids.
Collapse
Affiliation(s)
- D B Berkowitz
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, NE
| | | | | | | |
Collapse
|
18
|
Pedersen ML, Arnved KR, Johansen E. Genetic analysis of the minimal replicon of the Lactococcus lactis subsp. lactis biovar diacetylactis citrate plasmid. Mol Gen Genet 1994; 244:374-82. [PMID: 8078463 DOI: 10.1007/bf00286689] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Using a combination of mutagenesis with the transposon gamma delta and polymerase chain reaction subcloning, the essential elements of the replication region of the Lactococcus lactis subsp. lactis biovar diacetylactis citrate plasmid have been identified. An open reading frame, coding for a protein with homology to Rep proteins from other Lactococcus plasmids, is essential. This protein is trans-acting and could not be replaced by the Rep protein from another Lactococcus plasmid. A second open reading frame immediately downstream from the first could be removed or inactivated with no apparent effect on plasmid replication. A region containing two 10 bp direct repeats and three tandem repeats of a 22 bp sequence, immediately upstream of the essential open reading frame, is also essential and probably includes the origin of replication. A 181-bp DNA fragment containing this region was sufficient to allow replication in Lactococcus if the trans-acting protein was provided on another replicon. Single-stranded replication intermediates could not be detected, suggesting that the citrate plasmid uses theta replication rather than rolling-circle replication.
Collapse
Affiliation(s)
- M L Pedersen
- Institute of Life Sciences and Chemistry, Roskilde University Center, Denmark
| | | | | |
Collapse
|
19
|
Abstract
Intralobar bronchopulmonary sequestration typically receives systemic arterial supply from the descending thoracic or upper abdominal aorta. Isolated reports have documented supply from branch vessels of the abdominal aorta, including the celiac axis and inferior phrenic artery. We report a case of the anomalous arterial supply arising from the right renal artery.
Collapse
Affiliation(s)
- M L Pedersen
- Department of Radiology/SGHQRD, Wilford Hall United States Air Force Medical Center, Lackland Air Force Base, TX 78236-5300
| | | | | | | |
Collapse
|
20
|
Abstract
Oesophageal stricture and dysphagia after endoscopic sclerotherapy of oesophageal varices were assessed with regard to occurrence and severity and the relation to the treatment. We followed 34 patients for three to 47 months who had two to 25 treatments with submucosal, paravenous injections of polidocanol (3%). Twenty patients (59%) developed stricture or dysphagia; 14 both dysphagia and endoscopically verified stricture, two dysphagia without stricture, and four stricture without dysphagia. Both phenomena occurred intermittently and often independent of each other, but occupied median 38% of the observation time in these 20 patients. The patients developing strictures had received significantly more treatments and greater amount of sclerosant, and they had significantly more preceding mucosal necroses. The varices were eradicated to about the same degree and the incidence of recurrent haemorrhage was the same as in the patients who had not developed stricture.
Collapse
|
21
|
Siemssen OJ, Blichert-Toft M, Pedersen ML, Olesen KP, Jensen LB, Jacobsen GK. Mammography directed wire marking of nonpalpable breast lesions. A consecutive biopsy study of 100 patients. Acta Chir Scand 1981; 147:525-527. [PMID: 7345843] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Among 665 patients referred for breast complaints, 100 women (15%) had mammographically detected nonpalpable lesions suspected of malignancy. Using a mammography directed hook wire marking, 115 excisional biopsies were carried out. A correct biopsy containing the lesion was obtained in 113 instances. There were 2 failures, due to displacements of the wire in one case and surgical inexperience in another case. Two patients had minor wound complications. Invasive carcinoma was found in 12 and carcinoma in situ in 4 biopsies, i.e., a cancer rate of 16% of patients and 14% of biopsies. The biopsy procedure was simple, time saving, and acceptable of patients. The excisions were small and the cosmetic results excellent. During mammography for control of wire position, and during dressing and surgical manipulations the flexible hooked wire remained as originally placed in all cases but one.
Collapse
|
22
|
Abstract
Testis and liver histology, and pituitary-testicular function were studied in thirty chronic alcoholics. Severe reduction of spermatogenesis was found in 30% and in these patients serum follicle stimulating hormone and prolactin concentrations were significantly higher. There was no correlation between abnormalities in the liver and testis. The serum testosterone was normal in most cases. Sexual dysfunction and testicular atrophy occurred in more than half of the patients and were not related to liver disease. Testicular disorder in chronic alcoholism may be independent of liver disease.
Collapse
|