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Isaksson M, Isaksson J, Schwab-Stone M, Ruchkin V. Longitudinal associations between community violence exposure, posttraumatic stress symptoms, and eating disorder symptoms. J Eat Disord 2024; 12:6. [PMID: 38212849 PMCID: PMC10785541 DOI: 10.1186/s40337-024-00965-6] [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] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Accepted: 01/04/2024] [Indexed: 01/13/2024] Open
Abstract
BACKGROUND Eating disorder (ED) symptoms have been associated with different types of traumatic events, such as exposure to sexual and physical violence, and emotional abuse. However, the relation between ED symptoms and community violence exposure (CVE) is underexplored, despite the latter's adverse effects on many aspects of adolescent functioning. The primary aim of this study was to evaluate the relation between CVE and ED symptoms in adolescents, while also investigating the potential mediating and moderating roles of posttraumatic stress (PTS) symptoms, gender, and ethnicity. METHODS Data were collected longitudinally over two consecutive years in the city of New Haven, CT, in the United States. Participants were 2612 adolescent students from the public school system (1397 girls and 1215 boys) with an average age of 12.8 years (SD = 1.29). The students were comprised of several different ethnic groups, including Caucasians, African Americans and Hispanic Americans. Associations between CVE (no exposure, witnessing, and victimization) and PTS symptoms at year one, and ED symptoms (thoughts and compensatory behaviors) at year two, were assessed with self-rating instruments. Moderation and mediation analyses were conducted using a variant of linear regression (Hayes PROCESS macro). RESULTS ED symptoms at year two were significantly associated with both witnessing and being a victim of community violence at year one, with most or all of the relations being explained by PTS symptoms. Overall, neither gender nor ethnicity had a meaningful moderating effect in the observed relations. CONCLUSIONS The findings support the notion that assessing and addressing PTS symptoms might be beneficial when treating individuals with ED symptoms who have experienced community violence, irrespective of gender or ethnicity.
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Affiliation(s)
- Martina Isaksson
- Child and Adolescent Psychiatry Unit, Department of Medical Sciences, Uppsala University, S-751 85, Uppsala, Sweden
| | - Johan Isaksson
- Child and Adolescent Psychiatry Unit, Department of Medical Sciences, Uppsala University, S-751 85, Uppsala, Sweden
- Center of Neurodevelopmental Disorders (KIND), Centre for Psychiatry Research, Department of Women's and Children's Health, Karolinska Institutet and Stockholm Health Care Services, Region Stockholm, Sweden
| | - Mary Schwab-Stone
- Child Study Center, Yale University School of Medicine, New Haven, USA
| | - Vladislav Ruchkin
- Child and Adolescent Psychiatry Unit, Department of Medical Sciences, Uppsala University, S-751 85, Uppsala, Sweden.
- Child Study Center, Yale University School of Medicine, New Haven, USA.
- Sala Forensic Psychiatric Clinic, Sala, Sweden.
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Isaksson J, Isaksson M, Stickley A, Vermeiren R, Koposov R, Schwab-Stone M, Ruchkin V. Community Violence Exposure and Eating Disorder Symptoms among Belgian, Russian and US Adolescents: Cross-Country and Gender Perspectives. Child Psychiatry Hum Dev 2023:10.1007/s10578-023-01590-1. [PMID: 37606867 DOI: 10.1007/s10578-023-01590-1] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 08/11/2023] [Indexed: 08/23/2023]
Abstract
Community violence exposure (CVE) is one of the most common adverse childhood experiences worldwide. Despite this, its potential effect on disordered eating in adolescents from different cultures is underexplored. In the present cross-sectional study, self-reported data were collected from 9751 students (Mean age = 14.27) from Belgium, Russia and the US on CVE (witnessing violence and violence victimization), eating disorder (ED) symptoms (ED thoughts with associated compensatory behaviors), and comorbid symptoms of posttraumatic stress, depression and anxiety. Increased CVE (from no exposure to witnessing to victimization) was associated with more ED symptoms, and the associations remained significant after adjusting for comorbid conditions. The associations were similar for adolescents across the three countries. No gender differences were observed in the association between CVE and ED symptoms, even though girls in general reported more ED symptoms than boys. We conclude that CVE appears to be associated with ED symptoms in three culturally different samples of adolescents.
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Affiliation(s)
- Johan Isaksson
- Child and Adolescent Psychiatry Unit, Department of Medical Sciences, Uppsala University, Uppsala, Sweden
- Center of Neurodevelopmental Disorders (KIND), Centre for Psychiatry Research, Department of Women's and Children's Health, Karolinska Institutet & Stockholm Health Care Services, Region Stockholm, Sweden
| | - Martina Isaksson
- Child and Adolescent Psychiatry Unit, Department of Medical Sciences, Uppsala University, Uppsala, Sweden
| | - Andrew Stickley
- Department of Preventive Intervention for Psychiatric Disorders, National Institute of Mental Health, National Center of Neurology and Psychiatry, Tokyo, Japan
- Stockholm Center for Health and Social Change (SCOHOST), Södertörn University, Huddinge, Sweden
| | - Robert Vermeiren
- Department of Child and Adolescent Psychiatry Curium, Leiden University Medical Center, Leiden, Netherlands
| | - Roman Koposov
- Regional Centre for Child and Youth Mental Health and Child Welfare, UiT The Arctic University of Norway, Tromsö, Norway
- Department of Epidemiology and Modern Technologies of Vaccination, Institute of Professional Education, Sechenov First Moscow State Medical University, Moscow, Russia
| | - Mary Schwab-Stone
- Child Study Center, Yale University School of Medicine, New Haven, USA
| | - Vladislav Ruchkin
- Child and Adolescent Psychiatry Unit, Department of Medical Sciences, Uppsala University, Uppsala, Sweden.
- Child Study Center, Yale University School of Medicine, New Haven, USA.
- Sala Forensic Psychiatric Clinic, Sala, Sweden.
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Ali Y, Thomas R, Holgersson S, Isaksson M, Insulander Björk K. Experimental determination of concentration factors of Ni, Ru and Sb in the model diatom Phaeodactylum tricornutum. Sci Rep 2023; 13:13575. [PMID: 37604893 PMCID: PMC10442315 DOI: 10.1038/s41598-023-38795-2] [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: 11/08/2022] [Accepted: 07/14/2023] [Indexed: 08/23/2023] Open
Abstract
This paper describes the experimental determination of concentration factors (CF) for nickel, ruthenium and antimony in the model diatom Phaeodactylum tricornutum Bohlin (Bacillariophyceae), which was chosen as a representative of marine phytoplankton. Better determinations of these CF are needed to improve the modelling of marine ecosystems at release points, where radioactive pollutants enter the ecosystem, for more accurate predictions of radiation dose to humans caused by these pollutants. A literature study revealed that the currently implemented values of these CF are based on very scarce data, and a computational sensitivity study showed that the radiation dose caused by radioisotopes of these elements depend strongly on the phytoplankton CF. Nutrient-enriched water samples from Swedish coastal waters were used as a medium for growing of the diatom species P. tricornutum and radioactive isotopes of the studied elements were added to the cultures during the exponential growth phase. The radioactivity in the P. tricornutum and in the culture medium were measured separately and used for determination of CF. Conservative estimates of the CF based on this phytoplankton proxy on the present data are 6400 L/kg for nickel, 20,000 L/kg for ruthenium and 890 L/kg for antimony, with P. tricornutum biomass masses referring to dry weight. The estimates for nickel and ruthenium are similar to previously published values, which underpins the credibility of radiation dose calculations based on these values. The estimate for antimony is uncertain, but also, to our knowledge, represents the first published experimentally based data on this CF.
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Affiliation(s)
- Y Ali
- Department of Medical Radiation Sciences, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - R Thomas
- Department of Medical Radiation Sciences, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - S Holgersson
- Division of Energy and Materials, Department of Chemistry, Chalmers University of Technology, Gothenburg, Sweden
| | - M Isaksson
- Department of Medical Radiation Sciences, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - K Insulander Björk
- Department of Medical Radiation Sciences, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
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Piñero-García F, Thomas R, Mantero J, Forssell-Aronsson E, Isaksson M. Biodistribution of naturally occurring radionuclides and radiocesium in wild European perch (Perca fluviatilis). Ecotoxicol Environ Saf 2023; 260:115085. [PMID: 37267782 DOI: 10.1016/j.ecoenv.2023.115085] [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] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 05/12/2023] [Accepted: 05/27/2023] [Indexed: 06/04/2023]
Abstract
Wild European perch (Perca fluviatilis) is one of the most important freshwater fish species, in Sweden, due to its widespread and his value for recreational fishing. Little it is known regarding the biodistribution of naturally occurring radionuclides such as 238U, 234U, 226Ra, 210Po in perch. Therefore, in this study, perches from five lakes located in different counties in Sweden were collected to investigate the biodistribution of 238U, 234U, 226Ra, 210Po and 137Cs in organs and tissues of perch as well as their radiological impact. The results showed that uranium radionuclides ranged between 0.1 and 6 Bq/kg with an average value of 1.1 ± 1.5 Bq/kg. 226Ra varied from 0.4 to 8 Bq/kg with a mean concentration of 1.7 ± 1.9 Bq/kg. The ranged of 210Po was 0.5 - 250 Bq/kg, with an average value of 24 ± 52 Bq/kg. On the other hand, the highest activity concentration of 137Cs, 151 ± 1 Bq/kg, was detected in muscle samples of perch from Redsjösjön lake. For uranium radionuclides and 226Ra uptake from water is the main source whereas for 210Po and 137Cs the uptake is controlled by the perch diet. Regarding naturally occurring radionuclides, the perch tended to accumulated uranium radionuclides in fins, gills, and skin; 226Ra in bones, fins and skin and 210Po in the organs linked to digestive system. Finally, in case of consumption, it is advised the consumption of skinned fillets of perch due to the higher bioaccumulation of the radionuclides investigated in the skin and scales.
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Affiliation(s)
- F Piñero-García
- Department of Medical Radiation Sciences, Institute of Clinical Sciences, Sahlgrenska Academy at University of Gothenburg, Gothenburg SE-413 45, Sweden.
| | - R Thomas
- Department of Medical Radiation Sciences, Institute of Clinical Sciences, Sahlgrenska Academy at University of Gothenburg, Gothenburg SE-413 45, Sweden
| | - J Mantero
- Department of Medical Radiation Sciences, Institute of Clinical Sciences, Sahlgrenska Academy at University of Gothenburg, Gothenburg SE-413 45, Sweden; Department of Applied Physics II, ETSA, University of Seville, Seville 41012, Spain
| | - E Forssell-Aronsson
- Department of Medical Radiation Sciences, Institute of Clinical Sciences, Sahlgrenska Academy at University of Gothenburg, Gothenburg SE-413 45, Sweden; Department of Medical Physics and Biomedical Engineering, Sahlgrenska University Hospital, Gothenburg SE-413 45, Sweden
| | - M Isaksson
- Department of Medical Radiation Sciences, Institute of Clinical Sciences, Sahlgrenska Academy at University of Gothenburg, Gothenburg SE-413 45, Sweden
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Insulander Björk K, Thomas R, Holgersson S, Isaksson M. Experimental determination of concentration factors of Mn, Zn and I in the phytoplankton species Phaeodactylum Tricornutum. J Environ Radioact 2023; 261:107134. [PMID: 36805951 DOI: 10.1016/j.jenvrad.2023.107134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 09/16/2022] [Accepted: 02/03/2023] [Indexed: 06/18/2023]
Abstract
Anthropogenic radionuclides released into the environment cause a radiation dose to wildlife and humans which must be quantified, both to assess the effect of normal releases, and to predict the consequences of a larger, unplanned release. To estimate the spread of the radioactive elements, the ecosystem around release points is modelled, and element uptake is usually quantified by concentration factors (CF), which relates the concentration of an element in an organism to the concentration of the same element in a medium under equilibrium conditions. In this work, we experimentally determine some phytoplankton CF that are needed for improved modelling of the marine ecosystems around nuclear facilities and release points. CFs that require better determination have been identified through literature search. Sensitivity studies, using the currently used ecosystem modelling software PREDO, show that for most studied groups, the dose committed by the respective radionuclides is almost proportional to the corresponding phytoplankton CFs. In the present work, CFs are determined through laboratory experiments with cultured phytoplankton and radionuclides of the concerned elements, assessing the element uptake by the phytoplankton through detection of the emitted radiation. The three CF assessed in this work were those for manganese, zinc and iodine in phytoplankton. Conservative estimates of these CF based on the present data are 40 000 L/kg for manganese, 50 000 L/kg for zinc and 180 L/kg for iodine with the phytoplankton masses referring to their dry weight.
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Affiliation(s)
- K Insulander Björk
- Department of Medical Radiation Sciences, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Sweden.
| | - R Thomas
- Department of Medical Radiation Sciences, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Sweden
| | - S Holgersson
- Division of Energy and Materials, Department of Chemistry, Chalmers University of Technology, Sweden
| | - M Isaksson
- Department of Medical Radiation Sciences, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Sweden
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Eriksson E, Ramklint M, Wolf-Arehult M, Isaksson M. The relationship between self-control and symptoms of anxiety and depression in patients with eating disorders: a cross-sectional study including exploratory longitudinal data. J Eat Disord 2023; 11:21. [PMID: 36788558 PMCID: PMC9930220 DOI: 10.1186/s40337-023-00750-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Accepted: 02/06/2023] [Indexed: 02/16/2023] Open
Abstract
BACKGROUND Personality style can partly be described as the way an individual controls and regulates emotions and can be divided into over- and undercontrol. Studies have indicated that personality style may impact the onset, clinical presentation, and recovery from an eating disorder (ED). Furthermore, symptoms of anxiety and depression are common in patients with EDs. However, the association between self-control levels and anxiety/depression symptoms in patients with EDs remains unknown. The main aim of this study was to assess how levels of self-control relate to anxiety/depression symptoms in patients with EDs, with a secondary, exploratory aim to assess the stability of self-control during treatment. METHODS Patients were recruited from the outpatient ED clinic at the Uppsala University Hospital, between October 2014 and December 2019. In total, 227 patients (age: 25.4, SD: 7.1) were included at the start of their treatment, with 14 participants also completing post-treatment measurements. Self-control was assessed with the Ego Undercontrol scale (EUC-13), anxiety/depression symptoms with the Hopkins Symptoms Checklist (HSCL-25), and ED diagnosis and symptoms with the Eating Disorder Examination Interview (EDE-I) and Questionnaire (EDE-Q), respectively. RESULTS A quadratic regression (n = 227) showed that levels of self-control accounted for about four percent of the variance in degree of global anxiety/depressive symptoms. Anxiety/depression symptoms were better explained by ED symptoms (R2 = 0.24). Visualizations in boxplots revealed a tendency for extreme values of both over- and undercontrol to be associated with higher levels of depression, whereas symptoms of anxiety increased with increasing undercontrol. In the exploratory analyses (n = 14) levels of self-control remained more stable than symptoms of anxiety and depression, which decreased significantly during ED treatment. CONCLUSIONS Our results indicated that anxiety/depression symptoms, in patients with EDs, were not strongly correlated with levels of self-control, but rather with ED symptoms. However, extreme values of both over- and undercontrol showed a tendency to be associated with higher levels of depression symptoms, whereas anxiety symptoms increased with increasing levels of undercontrol. Future studies could benefit from considering both over- and undercontrol as potentially dysfunctional.
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Affiliation(s)
- Emmi Eriksson
- Department of Medical Sciences, Child and Adolescent Psychiatry, Uppsala University, Entrance 10, Floor 3B, 751 85, Uppsala, Sweden
| | - Mia Ramklint
- Department of Medical Sciences, Child and Adolescent Psychiatry, Uppsala University, Entrance 10, Floor 3B, 751 85, Uppsala, Sweden
| | - Martina Wolf-Arehult
- Department of Medical Sciences, Child and Adolescent Psychiatry, Uppsala University, Entrance 10, Floor 3B, 751 85, Uppsala, Sweden.,Department of Clinical Neuroscience, Centre for Psychiatry Research, Karolinska Institutet and Stockholm Health Care Services, Region Stockholm, Solna, Sweden
| | - Martina Isaksson
- Department of Medical Sciences, Child and Adolescent Psychiatry, Uppsala University, Entrance 10, Floor 3B, 751 85, Uppsala, Sweden.
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Alfonsson S, Winai E, Collin E, Isaksson M, Wolf-Arehult M. The Self-Compassion Scale-Short Form: Psychometric evaluation in one non-clinical and two clinical Swedish samples. Clin Psychol Psychother 2023. [PMID: 36648383 DOI: 10.1002/cpp.2830] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 01/10/2023] [Accepted: 01/11/2023] [Indexed: 01/18/2023]
Abstract
BACKGROUND Self-compassion has been defined as the ability to be with one's feelings of suffering in a warm and caring way. Research has shown a negative association between self-compassion and mental illness, and that low self-compassion can make psychotherapeutic effects less likely. The ability to measure a patient's self-compassion in a fast and reliable way is therefore important in investigating effects of psychotherapies. The aim of the present study was to evaluate the psychometric properties of the Swedish version of the Self-Compassion Scale-Short Form (SCS-SF) in both non-clinical (NC) and clinical samples. METHODS Cross-sectional data were gathered in a NC community sample (n = 1,089), an eating disorder (ED) sample (n = 253) and a borderline personality disorder (BPD) sample (n = 151). All participants were asked to complete a number of questionnaires, including the SCS-SF, and 121 participants in the NC sample repeated the assessment after 2 weeks for test-retest analysis. RESULTS Confirmatory factor analyses supported the first-order model suggested in previous research. Good internal consistency (Cronbach's alpha = 0.78-0.87) and test-retest reliability (intra-class correlation = 0.84) were demonstrated for the entire scale. Results also showed good convergent validity, demonstrating moderate negative associations between self-compassion and mental illnesses, as expected, and acceptable divergent validity, demonstrating weak positive associations between self-compassion and quality of life and mindfulness. DISCUSSION The correlations between the SCS-SF and the instruments used for validation were weaker in the clinical samples than the NC sample. This may be due to difficulties measuring these constructs or that the associations differ somewhat between different populations, which could warrant further research. The results added some support to the assumption that self-compassion may overlap with mindfulness yet still represents a distinct construct. CONCLUSIONS Analyses of the SCS-SF provided evidence of adequate to good psychometric properties, supporting use of the scale's total sum score and a first-order factor structure. This is in accordance with previous evaluations of the SCS-SF, suggesting that it is a reliable and time-efficient instrument for measuring a general level of self-compassion. This may be important when evaluating psychotherapy and investigating self-compassion and its influence on psychiatric illness.
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Affiliation(s)
- Sven Alfonsson
- Centre for Psychiatry Research, Department of Clinical Neuroscience, Karolinska Institutet & Stockholm Health Care Services, Stockholm County Council, Stockholm, Sweden
| | - Ebba Winai
- Psychiatry Northwest, Region Stockholm, Sollentuna, Sweden
| | - Emelie Collin
- Department of Medical Sciences, Uppsala University, Uppsala, Sweden.,The Eating Disorder Unit for Adults, Uppsala University Hospital, Uppsala, Sweden
| | - Martina Isaksson
- Department of Medical Sciences, Uppsala University, Uppsala, Sweden
| | - Martina Wolf-Arehult
- Centre for Psychiatry Research, Department of Clinical Neuroscience, Karolinska Institutet & Stockholm Health Care Services, Stockholm County Council, Stockholm, Sweden.,Department of Medical Sciences, Uppsala University, Uppsala, Sweden
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Vasiljevic S, Isaksson M, Wolf-Arehult M, Öster C, Ramklint M, Isaksson J. Brief internet-delivered skills training based on DBT for adults with borderline personality disorder - a feasibility study. Nord J Psychiatry 2023; 77:55-64. [PMID: 35352615 DOI: 10.1080/08039488.2022.2055791] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
OBJECTIVE Borderline personality disorder (BPD) is characterized by instability in emotions, relationships, and behaviors, such as self-injury and suicidal behavior. Dialectical Behavioral Therapy (DBT) is an established intervention for BPD, but there are long waiting times for treatment. This study aimed to explore if a brief internet-delivered DBT skills training program with minimal therapist support is acceptable, that it can be administered, useful, and does not do harm for patients with BPD. METHODS Acceptability was measured through data on recruitment and attrition, utilization of the intervention, reported impulses to drop out, and through ratings on self-injury and suicidality. Participants were interviewed about their experiences of the intervention; analyzed with content analysis. RESULTS Twenty patients on the waiting list for treatment at a DBT-clinic were invited and nine female patients (age 19-37 years) volunteered. The participants completed a large part of the intervention, which did not appear harmful since ratings of suicidal and self-harming behavior were similar before and after the intervention. In the interviews, participants stated that they had gained new knowledge and skills to manage situations, e.g. to stop and think before acting. Some even reported decreased levels of self-injury. The time spent on patient contact was short, and some patients reported difficulties to practice on their own and requested more support. CONCLUSIONS The intervention seems to be acceptable. Future studies should investigate in what ways some BPD patients are more susceptible to internet-delivered skills training than others, and if this intervention could be delivered within a stepped-care model.
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Affiliation(s)
- Sara Vasiljevic
- Department of Medical Sciences, Uppsala University, Uppsala, Sweden.,Department of Clinical Neuroscience, Karolinska Institutet, Stockholm
| | - Martina Isaksson
- Department of Medical Sciences, Uppsala University, Uppsala, Sweden
| | - Martina Wolf-Arehult
- Department of Medical Sciences, Uppsala University, Uppsala, Sweden.,Department of Clinical Neuroscience, Karolinska Institutet, Stockholm
| | - Caisa Öster
- Department of Medical Sciences, Uppsala University, Uppsala, Sweden
| | - Mia Ramklint
- Department of Medical Sciences, Uppsala University, Uppsala, Sweden
| | - Johan Isaksson
- Department of Medical Sciences, Uppsala University, Uppsala, Sweden.,Center of Neurodevelopmental Disorders (KIND), Centre for Psychiatry Research, Department of Women's and Children's Health, Karolinska Institutet & Stockholm Health Care Services, Stockholm, Sweden
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Isaksson M, Holmbom Goh M, Ramklint M, Wolf-Arehult M. The Social Safeness and Pleasure Scale (SSPS): a psychometric evaluation of the Swedish version in a non-clinical sample and two clinical samples with eating disorders or borderline personality disorder. BMC Psychol 2022; 10:311. [PMID: 36527142 PMCID: PMC9756562 DOI: 10.1186/s40359-022-01020-2] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Accepted: 12/09/2022] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Social safeness and pleasure refer to the extent to which people experience their world as safe, warm, and soothing. Difficulties in achieving social safeness have been identified as a transdiagnostic vulnerability factor for developing and maintaining psychopathology and for feeling less contentment and self-compassion. The study aim was to evaluate the psychometric properties of the Swedish version of the Social Safeness and Pleasure Scale (SSPS). METHODS The SSPS was evaluated in a non-clinical sample of 407 participants. The internal consistency and test-retest reliability of the SSPS were explored and a confirmatory factor analysis was performed. Convergent validity was studied based on the assumption of negative correlations with the personality traits detachment and mistrust, derived from the Swedish Universities Scale of Personality. Divergent validity was studied based on the assumption of no or small correlations with impulsiveness and adventure-seeking-personality traits not assumed to be related to social safeness. Validity was also investigated by comparing the SSPS results in the non-clinical sample with those in two clinical groups of patients diagnosed with either borderline personality disorder (BPD; n = 58) or eating disorders (n = 103), recruited from two psychiatric outpatient clinics. RESULTS Confirmatory factor analysis confirmed a one-factor structure. Cronbach's alpha was 0.95 and test-retest reliability was 0.92. Validity was supported by moderate to strong negative correlations between the SSPS and the detachment and mistrust scales and no or small correlations with the impulsiveness and adventure-seeking scales in a personality questionnaire. Finally, we found significantly lower mean values on the SSPS in the clinical groups compared with the non-clinical group, with the lowest mean in the BPD sample. CONCLUSIONS The results showed good to excellent psychometric properties for the Swedish version of the SSPS, supporting its use in both clinical practice and research. Future research could use the SSPS when evaluating interventions aimed at improving the ability to develop social safeness, such as compassion-focused therapy or radically open dialectical behavior therapy, interventions that may be particularly important in BPD patients.
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Affiliation(s)
- Martina Isaksson
- grid.8993.b0000 0004 1936 9457Department of Medical Sciences, Psychiatry, Uppsala University, Entrance 10, Floor 3B, 751 85 Uppsala, Sweden
| | - Maria Holmbom Goh
- grid.8993.b0000 0004 1936 9457Department of Medical Sciences, Psychiatry, Uppsala University, Entrance 10, Floor 3B, 751 85 Uppsala, Sweden
| | - Mia Ramklint
- grid.8993.b0000 0004 1936 9457Department of Medical Sciences, Psychiatry, Uppsala University, Entrance 10, Floor 3B, 751 85 Uppsala, Sweden
| | - Martina Wolf-Arehult
- grid.8993.b0000 0004 1936 9457Department of Medical Sciences, Psychiatry, Uppsala University, Entrance 10, Floor 3B, 751 85 Uppsala, Sweden ,grid.425979.40000 0001 2326 2191Department of Clinical Neuroscience, Centre for Psychiatry Research, Karolinska Institutet and Stockholm Health Care Services, Region Stockholm, Stockholm, Sweden
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Alfonsson S, Mardula K, Toll C, Isaksson M, Wolf-Arehult M. The self-efficacy in distress tolerance scale (SE-DT): a psychometric evaluation. Borderline Personal Disord Emot Dysregul 2022; 9:23. [PMID: 36210475 PMCID: PMC9549621 DOI: 10.1186/s40479-022-00195-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Accepted: 08/20/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Skills training is believed to be essential in dialectical behavior therapy (DBT) and is also offered as a standalone intervention. There is a need to better understand each skills module's separate contribution to treatment outcomes. Several assessment instruments are available, but none of them provides specific information about patients' perceived ability to use skills promoting distress tolerance. The aim of the present study was to develop and evaluate the psychometric properties of a Swedish adaptation of the General Self-Efficacy scale (GSE) for skills use in distress tolerance - the Self-Efficacy in Distress Tolerance scale (SE-DT). METHODS Cross-sectional and longitudinal data were gathered in a non-clinical (NC) community sample (n = 407) and a clinical psychiatric (CP) sample (n = 46). Participants in the NC sample were asked to complete a set of 19 self-report instruments, including the SE-DT, and 45 participants repeated the assessment after 2 weeks. The patients in the CP sample filled out a subset of eight instruments; twenty patients repeated the assessment after completing a treatment intervention including mindfulness skills and distress tolerance skills or emotion regulation skills. RESULTS The analyses showed that the SE-DT is unidimensional with high internal consistency (Cronbach's alpha = .92) and good test-retest reliability (intraclass correlation = .74). The SE-DT also showed good convergent and divergent validity, demonstrating positive correlations with general self-efficacy and self-compassion, and negative correlations with difficulties in emotion regulation, psychiatric symptoms, and borderline symptoms. The SE-DT showed sensitivity to change, when pre- and post-treatment assessments were compared (Cohen's d = 0.82). DISCUSSION This is preliminary evidence that the SE-DT has adequate to good psychometric properties, supporting the use of a total sum score. The results indicate that the SE-DT can adequately measure the construct of self-efficacy with regard to dealing with distress and emotional crises. The instrument enables continued investigation of standalone skills training and the specific contribution of distress tolerance skills to treatment outcomes in DBT. Further studies are needed to investigate whether these results are valid in other populations. In addition, the field would benefit from a common definition of distress tolerance.
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Affiliation(s)
- Sven Alfonsson
- Department of Clinical Neuroscience, Centre for Psychiatry Research, Karolinska Institutet and Stockholm City County, SE-171 77, Stockholm, Sweden
| | - Karolina Mardula
- Psychiatry Northwest, PO Box 98, Region Stockholm, SE-191 22, Sollentuna, Sweden
| | - Christine Toll
- Psychiatry Northwest, PO Box 98, Region Stockholm, SE-191 22, Sollentuna, Sweden
| | - Martina Isaksson
- Department of Neuroscience, Psychiatry, Uppsala University, Entrance 10, Floor 3B, SE-751 85, Uppsala, Sweden
| | - Martina Wolf-Arehult
- Department of Clinical Neuroscience, Centre for Psychiatry Research, Karolinska Institutet and Stockholm City County, SE-171 77, Stockholm, Sweden. .,Department of Neuroscience, Psychiatry, Uppsala University, Entrance 10, Floor 3B, SE-751 85, Uppsala, Sweden.
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Wright L, Florez M, Isaksson M, Lambert G, Marwick T. Current Applications of Remote Robot-Assisted Cardiac Ultrasound Examination: A Systematic Review of Clinical Use and Technological limitations. Heart Lung Circ 2022. [DOI: 10.1016/j.hlc.2022.06.241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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12
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Isaksson M, Ghaderi A, Wolf-Arehult M, Ramklint M. Psychometric properties of the Eating Disorder Symptom List (EDSL), a brief questionnaire for weekly assessment of eating disorder symptoms. Scand J Psychol 2021; 62:648-654. [PMID: 34291815 DOI: 10.1111/sjop.12765] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Accepted: 06/03/2021] [Indexed: 11/28/2022]
Abstract
Frequent assessment of eating disorder (ED) symptoms (e.g., on a weekly basis) may guide treatment planning in clinical services, and be an invaluable tool for improving clinical research. The aim of the present study was to evaluate the psychometric properties of a brief eight-item scale designed to assess ED behaviors during the preceding week (Eating Disorder Symptom List: EDSL). Cross-sectional data were collected in a non-clinical community sample (n = 406) and cross-sectional and longitudinal data were gathered in a clinical ED sample before and after treatment with Enhanced Cognitive Behavior Therapy for eating disorders (n = 47) and weekly during treatment with Radically Open Dialectical Behavior Therapy (n = 13). The EDSL showed acceptable to good internal consistency (α = 0.72-0.82) and test-retest reliability (r = 0.88). Convergent and divergent validity was satisfactory. Also, the EDSL was sensitive to change and could detect changes between before and after treatment, as well as on a weekly basis. We conclude that the EDSL is a brief scale entailing little patient burden, and that initial analyses of the scale provide preliminary evidence of satisfactory psychometric properties. The scale can be used for repeated measures in ED treatment studies and clinics to assess change or absence of change during treatment.
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Affiliation(s)
- Martina Isaksson
- Department of Neuroscience, Psychiatry, Uppsala University, Uppsala, Sweden
| | - Ata Ghaderi
- Department of Clinical Neuroscience, Division of psychology, Karolinska Institutet, Stockholm, Sweden.,Stockholm Centre for Eating Disorders, Stockholm Health Care Services, Stockholm County Council, Stockholm, SE-171 77, Sweden
| | - Martina Wolf-Arehult
- Department of Neuroscience, Psychiatry, Uppsala University, Uppsala, Sweden.,Psychiatry Northwest, Region Stockholm, Clinical Management, PO Box 98, Sollentuna, SE-191 22, Sweden
| | - Mia Ramklint
- Department of Neuroscience, Psychiatry, Uppsala University, Uppsala, Sweden
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13
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Isaksson M, Ghaderi A, Ramklint M, Wolf-Arehult M. Radically open dialectical behavior therapy for anorexia nervosa: A multiple baseline single-case experimental design study across 13 cases. J Behav Ther Exp Psychiatry 2021; 71:101637. [PMID: 33524917 DOI: 10.1016/j.jbtep.2021.101637] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 11/23/2020] [Accepted: 01/07/2021] [Indexed: 01/19/2023]
Abstract
BACKGROUND AND OBJECTIVES No treatment for adult anorexia nervosa (AN) has shown sufficient effectiveness or superiority to other treatments. Overcontrol has been suggested as a viable mechanism to target in the treatment of patients with AN. Radically open dialectical behavior therapy (RO DBT) is developed for disorders related to maladaptive overcontrol. Our objective was to evaluate the outcome of RO DBT for AN in a clinical outpatient setting. METHODS Thirteen adult female patients with mild to moderate AN provided written consent and entered a multiple baseline single-case experimental design study. Median age at eating disorder (ED) onset was 15 years and the median duration of the ED was 10 years. Individual changes were assessed weekly during a baseline phase (A) of four to six weeks, and during the subsequent 40-week RO DBT phase (B). Additional assessments were conducted before and after treatment, and at a six-month follow-up. Primary outcome was ED psychopathology. Secondary outcomes were psychosocial impairment, quality of life, social connectedness, and adaptive control strategies. RESULTS Eight patients (62%) completed treatment. All completers were in full remission after treatment, with BMI ≥18.5 kg/m2 and ED psychopathology within one standard deviation of the community mean. Improvements occurred after introducing RO DBT, not during baseline. LIMITATIONS Participants were female with mild to moderate AN, limiting generalizability to severe AN or males. CONCLUSIONS The study provides preliminary support for using RO DBT in adult outpatients with AN and overcontrol. Further studies should replicate these findings.
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Affiliation(s)
- Martina Isaksson
- Department of Neuroscience, Psychiatry, Uppsala University, Entrance 10, Floor 3B, 751 85, Uppsala, Sweden.
| | - Ata Ghaderi
- Division of Psychology, Department of Clinical Neuroscience, Karolinska Institutet, SE-171 77, Stockholm, Sweden.
| | - Mia Ramklint
- Department of Neuroscience, Psychiatry, Uppsala University, Entrance 10, Floor 3B, 751 85, Uppsala, Sweden.
| | - Martina Wolf-Arehult
- Department of Neuroscience, Psychiatry, Uppsala University, Entrance 10, Floor 3B, 751 85, Uppsala, Sweden.
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14
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Isaksson M, Ghaderi A, Wolf-Arehult M, Ramklint M. Overcontrolled, undercontrolled, and resilient personality styles among patients with eating disorders. J Eat Disord 2021; 9:47. [PMID: 33863394 PMCID: PMC8052746 DOI: 10.1186/s40337-021-00400-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Accepted: 03/26/2021] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND Personality has been suggested to be an important factor in understanding onset, maintenance, and recovery from eating disorders (ED). The objective of the current study was to evaluate personality style in different ED diagnostic groups as classified in the Diagnostic and Statistical Manual of Mental Disorders, Fifth edition (DSM-5). METHODS The overcontrolled, undercontrolled, and resilient personality styles were compared in four groups of patients with EDs: anorexia nervosa restricting (ANr) (n = 34), anorexia nervosa binge eating/purging (ANbp) (n = 31), atypical anorexia nervosa (AAN) (n = 29), and bulimia nervosa (BN) (n = 76). These groups were compared with a group of patients with borderline personality disorder (BPD) (n = 108), and a non-clinical group (NC) (n = 444). Patient data were collected at two outpatient clinics in Uppsala, Sweden. NC control data were collected through convenience sampling. Participants filled out questionnaires assessing personality style. RESULTS The main findings were more pronounced overcontrol reported by the ANr and AAN groups compared with the BN, BPD, and NC groups, and no significant difference in resilience between the ED and the NC groups. Considerable variability of over- and undercontrol was also found within each group. CONCLUSIONS The results replicate previous findings when EDs are classified according to current diagnostic criteria (DSM-5). Taking personality styles into account may improve our understanding of certain characteristics in EDs, such as social deficits and rigidity that are attributed to poor treatment outcome.
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Affiliation(s)
- Martina Isaksson
- Department of Neuroscience, Psychiatry, Uppsala University, Entrance 10, Floor 3B, SE-751 85, Uppsala, Sweden.
| | - Ata Ghaderi
- Division of Psychology, Department of Clinical Neuroscience, Karolinska Institutet, SE-171 77, Stockholm, Sweden.,Stockholm Centre for Eating Disorders, Stockholm Health Care Services, Stockholm County Council, SE-171 77, Stockholm, Sweden
| | - Martina Wolf-Arehult
- Department of Neuroscience, Psychiatry, Uppsala University, Entrance 10, Floor 3B, SE-751 85, Uppsala, Sweden.,Psychiatry Northwest, Region Stockholm, Clinical Management, PO Box 98, SE-191 22, Sollentuna, Sweden
| | - Mia Ramklint
- Department of Neuroscience, Psychiatry, Uppsala University, Entrance 10, Floor 3B, SE-751 85, Uppsala, Sweden
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15
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Isaksson M, Ghaderi A, Wolf-Arehult M, Öster C, Ramklint M. Sharing and connecting with others - patient experiences of radically open dialectical behavior therapy for anorexia nervosa and overcontrol: a qualitative study. J Eat Disord 2021; 9:29. [PMID: 33663612 PMCID: PMC7931519 DOI: 10.1186/s40337-021-00382-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Accepted: 02/11/2021] [Indexed: 01/19/2023] Open
Abstract
BACKGROUND Recovery rates after psychological treatments for anorexia nervosa are low to moderate, and in adults, no treatment outperforms any other. The aim of this study was to evaluate patient experiences of Radically open dialectical behavior therapy (RO DBT), a treatment developed for disorders related to maladaptive overcontrol. METHODS Eleven female patients with anorexia nervosa were interviewed after either treatment completion (eight patients) or drop-out (three patients) from RO DBT. Interviews were transcribed and analyzed with inductive thematic analysis. RESULTS The analysis yielded five main themes: 1) a comprehensive treatment, 2) the benefits of sharing and connecting with others, 3) growing trust, 4) moving toward valued goals - but some remain, and 5) doing well in treatment. CONCLUSION Patients appreciated what they described as a comprehensive treatment and holistic view of their problems, which helped them reduce both maladaptive overcontrol and eating disorder symptoms. Gradually sharing personal experiences both in- and outside therapy was described as essential and led to enhanced social connectedness. TRIAL REGISTRATION The intervention study (Isaksson M, et al. J Behav Ther Exp Psychiatry. 71, 2021) that preceded this interview study was performed by the first, second, third, and fifth author, preregistered in the ISRCTN registry (no: ISRCTN47156042 ).
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Affiliation(s)
- Martina Isaksson
- Department of Neuroscience, Psychiatry, Uppsala University, Entrance 10, Floor 3B, SE-751 85, Uppsala, Sweden.
| | - Ata Ghaderi
- Division of Psychology, Department of Clinical Neuroscience, Karolinska Institutet, SE-171 77, Stockholm, Sweden.,Stockholm Centre for Eating Disorders, Stockholm Health Care Services, Stockholm County Council, SE-171 77, Stockholm, Sweden
| | - Martina Wolf-Arehult
- Department of Neuroscience, Psychiatry, Uppsala University, Entrance 10, Floor 3B, SE-751 85, Uppsala, Sweden.,Psychiatry Northwest, Region Stockholm, Clinical Management, PO Box 98, SE-191 22, Sollentuna, Sweden
| | - Caisa Öster
- Department of Neuroscience, Psychiatry, Uppsala University, Entrance 10, Floor 3B, SE-751 85, Uppsala, Sweden
| | - Mia Ramklint
- Department of Neuroscience, Psychiatry, Uppsala University, Entrance 10, Floor 3B, SE-751 85, Uppsala, Sweden
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16
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Thomas R, Mantero J, Pérez-Moreno SM, Ruiz-Canovas C, Vioque I, Isaksson M, Forssell-Aronsson E, Holm E, García-Tenorio R. 226Ra, 210Po and lead isotopes in a pit lake water profile in Sweden. J Environ Radioact 2020; 223-224:106384. [PMID: 32919820 DOI: 10.1016/j.jenvrad.2020.106384] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Revised: 07/01/2020] [Accepted: 08/08/2020] [Indexed: 06/11/2023]
Abstract
A pit lake arises as a consequence of anthropogenic activities in opencast mining areas. These water bodies may be enriched in hazardous stable contaminants and/or in naturally occurring radionuclides depending on the local geological conditions. Mining legacy in Sweden produced hundreds of these pit lakes and most of them are used for recreational purposes in the southern part of the country. In this paper, one pit lake was selected for having enhanced levels of natural radionuclides. Physico-chemical parameters (temperature, pH, oxidation-reduction potential, dissolved oxygen and depth), elemental composition (via Inductive Coupled Plasma Mass Spectrometry) and radiometric characterization (via alpha spectrometry of 226Ra, 210Po and 210Pb) were carried along the depth of a 60 m depth pit lake, with the main aim to describe how natural radionuclides and elements behaves with depth in a non-uraniferous pit lake. Based on observed changes in physico-chemical parameters, a thermocline and a chemocline region were identified at around 10 and 30 m depth respectively. Concerning radionuclides, 226Ra ranged from 75 ± 3 up to 360 ± 12 mBq/kg while 210Po ranged from 11 ± 1 up to 71 ± 3 mBq/kg. 210Pb distribution with depth was also determined via secular equilibrium with 210Po after 2 years and also stable Pb was measured. Disequilibrium 226Ra-210Pb was found and the residence time of 210Pb in the water column was assessed. Additionally, different vertical distributions between 210Pb and Pb were found which points out different sources for different lead isotopes in the water body.
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Affiliation(s)
- R Thomas
- Department of Radiation Physics, Institute of Clinical Sciences, Sahlgrenska Academy at University of Gothenburg, Gothenburg, 413 45, Sweden
| | - J Mantero
- Department of Radiation Physics, Institute of Clinical Sciences, Sahlgrenska Academy at University of Gothenburg, Gothenburg, 413 45, Sweden; Department of Applied Physics II, ETSA, Universidad de Sevilla, Seville, 41012 Spain.
| | - S M Pérez-Moreno
- Group of Radiation Physics and Environment, Universidad de Huelva, Huelva, Spain
| | - C Ruiz-Canovas
- Department of Earth Sciences & Research Center on Natural Resources, Health and the Environment. University of Huelva, Huelva, 21071, Spain
| | - I Vioque
- Department of Applied Physics II, ETSA, Universidad de Sevilla, Seville, 41012 Spain
| | - M Isaksson
- Department of Radiation Physics, Institute of Clinical Sciences, Sahlgrenska Academy at University of Gothenburg, Gothenburg, 413 45, Sweden
| | - E Forssell-Aronsson
- Department of Radiation Physics, Institute of Clinical Sciences, Sahlgrenska Academy at University of Gothenburg, Gothenburg, 413 45, Sweden
| | - E Holm
- Department of Radiation Physics, Institute of Clinical Sciences, Sahlgrenska Academy at University of Gothenburg, Gothenburg, 413 45, Sweden
| | - R García-Tenorio
- Department of Applied Physics II, ETSA, Universidad de Sevilla, Seville, 41012 Spain; Spanish National Accelerator Centre (CNA), US-JA-CSIC, Sevilla, 41092, Spain
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Rääf C, Finck R, Martinsson J, Hinrichsen Y, Isaksson M. Averting cumulative lifetime attributable risk (LAR) of cancer by decontamination of residential areas affected by a large-scale nuclear power plant fallout: time aspects of radiological benefits for newborns and adults. J Radiol Prot 2020; 40:790-814. [PMID: 32492663 DOI: 10.1088/1361-6498/ab993a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The averted cumulative lifetime attributable risk (LAR), the residual dose and highest ground deposition of 137Cs complying with a reference dose level of 20 mSv yr-1 to an individual returning after one year to an area contaminated by unfiltered releases of fission products from a nuclear power plant (NPP) were evaluated by applying an existing exposure model designed to compute age- and gender-dependent time-integrated LAR. The model was applied to four types of nuclear fallout scenarios, partly based on data from the Chernobyl and Fukushima releases and from theoretical source terms from Swedish NPPs. For rapid decontamination measures that achieve a 50% relative reduction in external dose rate within 1 year, compliance with the reference level 20 mSv yr-1 can be attained for an initial 137Cs ground deposition of up to 2 MBq m-2 with relaxed food restrictions. This compliance can be attained at even higher ground deposition (up to 4.5 MBq m-2) if using the strict food restrictions employed in Japan after 2011. Considering longer than 1 year return times it was also found that the benefit of implementing decontamination decreases rapidly with time (2-3 years half-time), especially if the fallout has a high initial 134Cs to 137Cs activity ratio and if the ecological half-time of the external dose rate is short (<5 years). Depending on fallout scenario the averted cumulative LAR for newborn girls by decontamination that is achieved after 5 years is only between 6% and 11% of that obtained by evacuation alone during the same time, indicating a rather limited radiological benefit of decontamination if delayed more than a few years. We conclude that decision makers and emergency response planners need to consider that protracted decontamination measures may have limited radiological benefit compared with evacuation in terms of averted future cancer cases, albeit it may have other societal benefits.
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Affiliation(s)
- C Rääf
- Medical Radiation Physics, Department of Translational Medicine, Malmö, Lund University, SE-205 02 Malmö, Sweden
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18
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Passlov HM, Pontén A, Björk J, Rosén B, Bruze M, Svedman C, Isaksson M. Hand strength and dexterity in individuals with hand eczema. J Eur Acad Dermatol Venereol 2020; 34:2856-2862. [PMID: 32243631 DOI: 10.1111/jdv.16401] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2019] [Accepted: 03/10/2020] [Indexed: 11/29/2022]
Abstract
BACKGROUND Patients with hand eczema often describe symptoms such as pain, clumsiness and difficulty flexing their fingers, thus impairing the function of the hand. OBJECTIVE The aim of this study was to investigate whether hand eczema is associated with a measurable impairment of hand strength and dexterity. We also studied the relationship between hand function and the ability to perform activities of daily living (ADL), pain level and quality of life measured with the Dermatology Life Quality Index (DLQI). METHODS Twenty-one participants with ongoing hand eczema were examined with well-established methods for measuring hand grip strength, pinch strength and dexterity. A questionnaire was designed to investigate perceived ability to perform ADL. The participants were also asked to grade their current pain level, and the DLQI was used to assess the participants' quality of life. A group of 12 participants was reinvestigated when healed. RESULTS The participants demonstrated a significant improvement in all functional tests when healed. There was a strong correlation between ADL and both dexterity and hand grip strength. There was also a strong correlation between ADL and pain. All participants reported some difficulty performing ADL. CONCLUSIONS Our results suggest that ongoing hand eczema may lead to a measurable decrease of strength and dexterity of the hand, leading to an impairment of the ability to perform ADL and consequently to a poorer quality of life.
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Affiliation(s)
- H M Passlov
- Department of Occupational and Environmental Dermatology, Skåne University Hospital, Lund University, Malmö, Sweden
| | - A Pontén
- Department of Occupational and Environmental Dermatology, Skåne University Hospital, Lund University, Malmö, Sweden
| | - J Björk
- Department of Occupational and Environmental Medicine, Skåne University Hospital, Lund University, Lund, Sweden
| | - B Rosén
- Department of Hand Surgery, Skåne University Hospital, Lund University, Malmö, Sweden
| | - M Bruze
- Department of Occupational and Environmental Dermatology, Skåne University Hospital, Lund University, Malmö, Sweden
| | - C Svedman
- Department of Occupational and Environmental Dermatology, Skåne University Hospital, Lund University, Malmö, Sweden
| | - M Isaksson
- Department of Occupational and Environmental Dermatology, Skåne University Hospital, Lund University, Malmö, Sweden
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Lebacq A, Saizu M, Takahashi M, Isaksson M, Bravo B, Brose J, Csizmadia L, Fojtík P, Kövendiné-Kónyi J, Lünendonk G, Meisenberg O, Mosimann N, Osko J, Pantya A, Saurat D, Taba G, Torvela T, Vagfoldi Z, Vilardi I, Vu I, Youngman M, Zoriy P, Beaumont T, Franck D, Broggio D. European intercomparison on the measurement of l-131 in thyroid of adults and children. RADIAT MEAS 2019. [DOI: 10.1016/j.radmeas.2019.106178] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Bruze M, Engfeldt M, Ofenloch R, Elsner P, Goncalo M, Isaksson M, Naldi L, Schuttelaar M, Svensson Å, Diepgen T. Validation of a questionnaire algorithm based on repeated open application testing with the constituents of fragrance mix I. Br J Dermatol 2019; 182:955-964. [DOI: 10.1111/bjd.18224] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/10/2019] [Indexed: 01/10/2023]
Affiliation(s)
- M. Bruze
- Department of Occupational and Environmental Dermatology Lund University Skåne University Hospital Malmö Sweden
| | - M. Engfeldt
- Department of Occupational and Environmental Dermatology Lund University Skåne University Hospital Malmö Sweden
| | - R. Ofenloch
- Department of Clinical Social Medicine University Hospital Heidelberg Heidelberg Germany
| | - P. Elsner
- Department of Dermatology University Hospital Jena Jena Germany
| | - M. Goncalo
- Department of Dermatology University Hospital and Faculty of Medicine University of Coimbra Coimbra Portugal
| | - M. Isaksson
- Department of Occupational and Environmental Dermatology Lund University Skåne University Hospital Malmö Sweden
| | - L. Naldi
- Centro Studi GISED – FROM Presidio Ospedaliero Matteo Rota Bergamo Italy
| | - M.‐L. Schuttelaar
- Department of Dermatology University of Groningen University Medical Center Groningen Groningen the Netherlands
| | - Å. Svensson
- Department of Dermatology Lund University Skåne University Hospital Malmö Sweden
| | - T. Diepgen
- Department of Clinical Social Medicine University Hospital Heidelberg Heidelberg Germany
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Rääf CL, Tondel M, Isaksson M. A model for estimating the total absorbed dose to the thyroid in Swedish inhabitants following the Chernobyl Nuclear Power Plant accident: implications for existing international estimates and future model applications. J Radiol Prot 2019; 39:522-547. [PMID: 30736018 DOI: 10.1088/1361-6498/ab0577] [Citation(s) in RCA: 2] [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] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The time-integrated absorbed dose to the thyroid gland in the years after a fallout event can indicate the potential excess number of thyroid cancers among young individuals after a radionuclide release. Typical mean values of the absorbed dose to the thyroid have been calculated previously using reported data on radioiodine obtained from air sampling and dairy milk surveys in Sweden after the Chernobyl fallout, not including the contribution from 134Cs and 137Cs. We have developed a model for Swedish conditions taking these additional dose contributions into account. Our estimate of the average time-integrated absorbed dose to the thyroid, D th,tot, during the first 5 years after fallout ranged from 0.5-4.1 mGy for infants and from 0.3-3.3 mGy for adults. The contribution to D th,tot from 131I through inhalation and milk consumption varied considerably among different regions of Sweden, ranging from 9%-79% in infants, and from 4%-58% in adults. The external irradiation and exposure from the ingestion of 134,137Cs in foodstuffs accounted for the remaining contributions to D th,tot (i.e. up to 96% for adults). These large variations can be explained by the highly diverse conditions in the regions studied, such as different degrees of fractionation between wet and dry deposition, different grazing restrictions on dairy cattle, and differences in 134,137Cs transfers through food resulting from differences in the local fallout. It is our conclusion that the main contribution to D th,tot from nuclear power plant fallout in areas subjected to predominantly wet deposition will be from external exposure from ground deposition, followed by internal exposure from contaminated food containing the long-lived fission product 137Cs and the neutron-activated fission product 134Cs. The contribution from 134,137Cs to the thyroid absorbed dose should thus be taken into account in future epidemiological studies.
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Affiliation(s)
- C L Rääf
- Medical Radiation Physics, Department of Translational Medicine (ITM), Lund University, Sweden
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Maksimov P, Isaksson M, Schares G, Romig T, Conraths FJ. Validation of PCR-based protocols for the detection of Echinococcus multilocularis DNA in the final host using the Intestinal Scraping Technique as a reference. Food Waterborne Parasitol 2019; 15:e00044. [PMID: 32095616 PMCID: PMC7034050 DOI: 10.1016/j.fawpar.2019.e00044] [Citation(s) in RCA: 5] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2018] [Revised: 02/24/2019] [Accepted: 02/26/2019] [Indexed: 12/28/2022] Open
Abstract
Oral uptake of infectious Echinococcus multilocularis eggs shed by canids with their faeces may lead to development of alveolar echinococcosis in humans, which is clinically similar to a malignant infiltrative tumor and may be fatal if left untreated. E. multilocularis is therefore regarded as one of the most important and neglected metazoan parasites in the Northern hemisphere. The diagnosis of this tapeworm in the final host plays a key role in the epidemiology of E. multilocularis. The diagnostic performance of a magnetic-capture (MC) DNA extraction protocol in combination with a minor groove-binder real time PCR (MC-MGBqPCR) for the detection of E. multilocularis eggs was determined relative to a highly sensitive variant of the Intestinal Scraping Technique (IST) using faecal samples of foxes. In addition, we compared results obtained by MC-MGBqPCR with those of a previously validated protocol (QIAamp Fast DNA Stool Mini Kit (QT) combined with a TaqMan qPCR). Furthermore, a workflow using the NucleoMagVet DNA extraction kit (NM) in combination with MGBqPCR and TaqMan-qPCR was also included in the comparisons. To estimate the analytical sensitivity, phosphate-buffered saline and fox faecal samples were spiked with different numbers of eggs and tested in defined combinations of DNA extraction and PCR protocols. To assess the diagnostic sensitivity of the different workflows, samples were used that had been collected from the ampulla recti or the rectum of 120 foxes hunted in Brandenburg, Germany. The samples represented five IST categories formed according to the E. multilocularis worm burden of the foxes. For DNA extraction by MC or using two other commercial extraction kits, the supernatants obtained from 3 g of bead-beaten faecal samples were used. The extracted DNAs were then processed in the respective PCR protocols. The MC-MGBqPCR showed the highest diagnostic sensitivity (93%; 95% Confidence Interval (CI): 86–97%) relative to IST. The QT extraction protocol in combination with TaqMan-qPCR had the second highest sensitivity (89%; 95% CI: 80–94%), followed by NM with MGBqPCR (86%; 95% CI: 77–93%) in comparison to IST. The lowest diagnostic sensitivity was found for the NM combined with the TaqMan-qPCR protocol (72%; 95% CI: 62–82%). In conclusion, the MC-MGBqPCR seems to represent a suitable alternative to IST. However, applied to 3 g faecal samples, the less costly QT-TaqMan-qPCR workflow yielded a similar diagnostic sensitivity relative to IST. However, differences between these two workflows were not statistically significant. PCR based protocols can be used for the detection of E. multilocularis in faeces of final hosts after careful validation A DNA capture method seems to represent a suitable alternative to the Intestinal Scraping Technique The QT-TaqMan-qPCR workflow yielded also a similar diagnostic sensitivity relative to the Intestinal Scraping Technique None of the DNA extraction kits was able to remove faecal PCR inhibitors completely
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Affiliation(s)
- P Maksimov
- Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Institute of Epidemiology, Südufer 10, 17493 Greifswald-Insel Riems, Germany
| | - M Isaksson
- Department of Virology Immunobiology and Parasitology, National Veterinary Institute, Uppsala, Sweden
| | - G Schares
- Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Institute of Epidemiology, Südufer 10, 17493 Greifswald-Insel Riems, Germany
| | - T Romig
- FG Parasitologie 220B, Universität Hohenheim, 70593 Stuttgart, Germany
| | - F J Conraths
- Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Institute of Epidemiology, Südufer 10, 17493 Greifswald-Insel Riems, Germany
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23
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Saevik ÅB, Åkerman AK, Grønning K, Nermoen I, Valland SF, Finnes TE, Isaksson M, Dahlqvist P, Bergthorsdottir R, Ekwall O, Skov J, Nedrebø BG, Hulting AL, Wahlberg J, Svartberg J, Höybye C, Bleskestad IH, Jørgensen AP, Kämpe O, Øksnes M, Bensing S, Husebye ES. Clues for early detection of autoimmune Addison's disease - myths and realities. J Intern Med 2018; 283:190-199. [PMID: 29098731 DOI: 10.1111/joim.12699] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
BACKGROUND Early detection of autoimmune Addison's disease (AAD) is important as delay in diagnosis may result in a life-threatening adrenal crisis and death. The classical clinical picture of untreated AAD is well-described, but methodical investigations are scarce. OBJECTIVE Perform a retrospective audit of patient records with the aim of identifying biochemical markers for early diagnosis of AAD. MATERIAL AND METHODS A multicentre retrospective study including 272 patients diagnosed with AAD at hospitals in Norway and Sweden during 1978-2016. Scrutiny of medical records provided patient data and laboratory values. RESULTS Low sodium occurred in 207 of 247 (84%), but only one-third had elevated potassium. Other common nonendocrine tests were largely normal. TSH was elevated in 79 of 153 patients, and hypoglycaemia was found in 10%. Thirty-three per cent were diagnosed subsequent to adrenal crisis, in whom electrolyte disturbances were significantly more pronounced (P < 0.001). Serum cortisol was consistently decreased (median 62 nmol L-1 [1-668]) and significantly lower in individuals with adrenal crisis (38 nmol L-1 [2-442]) than in those without (81 nmol L-1 [1-668], P < 0.001). CONCLUSION The most consistent biochemical finding of untreated AAD was low sodium independent of the degree of glucocorticoid deficiency. Half of the patients had elevated TSH levels. Only a minority presented with marked hyperkalaemia or other nonhormonal abnormalities. Thus, unexplained low sodium and/or elevated TSH should prompt consideration of an undiagnosed AAD, and on clinical suspicion bring about assay of cortisol and ACTH. Presence of 21-hydroxylase autoantibodies confirms autoimmune aetiology. Anticipating additional abnormalities in routine blood tests may delay diagnosis.
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Affiliation(s)
- Å B Saevik
- Department of Clinical Medicine, University of Bergen, Bergen, Norway
| | - A-K Åkerman
- Department of Medicine, Örebro University Hospital, Örebro, Sweden.,Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden
| | - K Grønning
- Division of Medicine, Akershus University Hospital, Lørenskog, Norway
| | - I Nermoen
- Division of Medicine, Akershus University Hospital, Lørenskog, Norway.,Institute of Clinical Medicine, Akershus University Hospital, University of Oslo, Lørenskog, Norway
| | - S F Valland
- Division of Endocrinology, Innlandet Hospital Trust, Hamar, Norway
| | - T E Finnes
- Division of Endocrinology, Innlandet Hospital Trust, Hamar, Norway
| | - M Isaksson
- Department of Medical Sciences, Uppsala University, Uppsala, Sweden
| | - P Dahlqvist
- Department of Public Health and Clinical Medicine, Umeå University, Umeå, Sweden
| | - R Bergthorsdottir
- Department of Endocrinology, Sahlgrenska University Hospital, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.,Department of Internal Medicine and Clinical Nutrition, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - O Ekwall
- Department of Pediatrics, Institute of Clinical Sciences, The Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.,Department of Rheumatology and Inflammation Research, Institute of Medicine, The Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - J Skov
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden.,Endocrine Division, Department of Medicine, Karlstad City Hospital, Karlstad, Sweden
| | - B G Nedrebø
- Department of Clinical Medicine, University of Bergen, Bergen, Norway.,Department of Medicine, Haugesund Hospital, Haugesund, Norway
| | - A-L Hulting
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden
| | - J Wahlberg
- Division of Endocrinology, Department of Medical and Health Sciences, Faculty of Health Sciences, Linköping University, Linköping, Sweden
| | - J Svartberg
- Division of Internal Medicine, University Hospital of North Norway, Tromsø, Norway.,Tromsø Endocrine Research Group, Department of Clinical Medicine, UiT The Arctic University of Norway, Tromsø, Norway
| | - C Höybye
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden.,Department of Endocrinology, Metabolism and Diabetes, Karolinska University Hospital, Stockholm, Sweden
| | - I H Bleskestad
- Department of Internal Medicine, Stavanger University Hospital, Stavanger, Norway
| | - A P Jørgensen
- Department of Endocrinology, Oslo University Hospital, Oslo, Norway
| | - O Kämpe
- Department of Endocrinology, Metabolism and Diabetes, Karolinska University Hospital, Stockholm, Sweden.,Department of Medicine, Solna, Karolinska Institutet, Stockholm, Sweden.,K.G. Jebsen center for Autoimmune Disorders, University of Bergen, Bergen, Norway
| | - M Øksnes
- Department of Clinical Medicine, University of Bergen, Bergen, Norway.,Department of Medicine, Solna, Karolinska Institutet, Stockholm, Sweden.,Department of Medicine, Haukeland University Hospital, Bergen, Norway
| | - S Bensing
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden.,Department of Endocrinology, Metabolism and Diabetes, Karolinska University Hospital, Stockholm, Sweden
| | - E S Husebye
- Department of Clinical Medicine, University of Bergen, Bergen, Norway.,Department of Medicine, Solna, Karolinska Institutet, Stockholm, Sweden.,K.G. Jebsen center for Autoimmune Disorders, University of Bergen, Bergen, Norway.,Department of Medicine, Haukeland University Hospital, Bergen, Norway
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24
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Isaksson M, Fahlström M, Ossipova N, Rosén K. Rapid gamma spectrometric analysis of soil samples after radioactive fallout using a "conjugate view" technique. J Environ Radioact 2017; 177:250-255. [PMID: 28719852 DOI: 10.1016/j.jenvrad.2017.07.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2017] [Revised: 07/07/2017] [Accepted: 07/08/2017] [Indexed: 06/07/2023]
Abstract
A method for fast determination of the activity in soil samples by measuring a fresh soil core sample from both ends with an HPGe-detector is proposed. The method was tested by simulations, as well as by measurements on spiked soil samples. Both simulations and measurements showed that the geometrical mean of the count rates when the sample is measured twice, with the bottom and the top end, respectively, facing the detector closely resembles the count rate from a measurement on a homogenized sample. Therefore, an efficiency calibration for homogenized samples could be used even if the activity is highly inhomogeneous in the soil core, as is the case with fresh fallout. It was also shown that by studying the ratio between the two measurements, a rough estimation of the extent of penetration of the radionuclide in the soil can be found. This will enhance the possibility to make rapid estimations of the soil inventory by field gamma spectrometry.
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Affiliation(s)
- M Isaksson
- Department of Radiation Physics, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Sweden.
| | - M Fahlström
- Department of Radiation Physics, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Sweden
| | - N Ossipova
- Department of Radiation Physics, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Sweden
| | - K Rosén
- Department of Soil and Environment, Swedish University of Agricultural Sciences, Sweden
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25
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Döse M, Silfwerbrand J, Jelinek C, Trägårdh J, Isaksson M. Naturally occurring radioactivity in some Swedish concretes and their constituents - Assessment by using I-index and dose-model. J Environ Radioact 2016; 155-156:105-111. [PMID: 26942843 DOI: 10.1016/j.jenvrad.2016.02.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Revised: 02/05/2016] [Accepted: 02/13/2016] [Indexed: 06/05/2023]
Abstract
The reference level for effective dose due to gamma radiation from building materials and construction products used for dwellings is set to 1 mSv per year (EC, 1996, 1999), (CE, 2014). Given the specific conditions presented by the EC in report 112 (1999) considering building and construction materials, an I-index of 1 may generate an effective dose of 1 mSv per year. This paper presents a comparison of the activity concentrations of (4)(0)K, (226)Ra and (232)Th of aggregates and when these aggregates constitute a part of concrete. The activity concentration assessment tool for building and construction materials, the I-index, introduced by the EC in 1996, is used in the comparison. A comparison of the I-indices values are also made with a recently presented dose model by Hoffman (2014), where density variations of the construction material and thickness of the construction walls within the building are considered. There was a ∼16-19% lower activity index in concretes than in the corresponding aggregates. The model by Hoffman further implies that the differences between the I-indices of aggregates and the concretes' final effective doses are even larger. The difference is due, mainly to a dilution effect of the added cement with low levels of natural radioisotopes, but also to a different and slightly higher subtracted background value (terrestrial value) used in the modeled calculation of the revised I-index by Hoffman (2014). Only very minimal contributions to the annual dose could be related to the water and additives used, due to their very low content of radionuclides reported.
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Affiliation(s)
- M Döse
- Swedish Cement and Concrete Research Institute (CBI), c/o SP, Box 857, SE-501 15 Borås, Sweden.
| | - J Silfwerbrand
- Royal Institute of Technology (KTH), Department of Civil and Architectural Engineering, Brinellvägen 23, SE-100 44 Stockholm, Sweden.
| | - C Jelinek
- Geological Survey of Sweden, Box 670, SE-751 28 Uppsala, Sweden.
| | - J Trägårdh
- Swedish Cement and Concrete Research Institute (CBI), Drottning Kristinas väg 26, SE-100 44 Stockholm, Sweden.
| | - M Isaksson
- University of Gothenburg, Institute of Clinical Science, Department of Radiation Physics, Gula Stråket 2B, Sahlgrenska University Hospital, SE-413 45, Göteborg, Sweden.
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26
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Hauksson I, Pontén A, Gruvberger B, Isaksson M, Engfeldt M, Bruze M. Skincare products containing low concentrations of formaldehyde detected by the chromotropic acid method cannot be safely used in formaldehyde-allergic patients. Br J Dermatol 2015; 174:371-9. [PMID: 26480304 DOI: 10.1111/bjd.14241] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/17/2015] [Indexed: 11/30/2022]
Abstract
BACKGROUND Formaldehyde is a well-known contact sensitizer. Formaldehyde releasers are widely used preservatives in skincare products. It has been found that formaldehyde at concentrations allowed by the European Cosmetics Directive can cause allergic contact dermatitis. However, we still lack information on whether formaldehyde at low concentrations affects dermatitis in formaldehyde-allergic individuals. OBJECTIVES To study the effects of low concentrations of formaldehyde on irritant contact dermatitis in formaldehyde-allergic individuals. METHODS Fifteen formaldehyde-allergic individuals and a control group of 12 individuals without contact allergy to formaldehyde and formaldehyde releasers were included in the study. The individuals performed the repeated open application test (ROAT) during 4 weeks with four different moisturizers releasing formaldehyde in concentrations that had been determined as > 40, 20-40, 2·5-10 and 0 p.p.m. by the chromotropic acid (CA) spot test. Dimethyloldimethylhydantoin was used as a formaldehyde releaser in the moisturizers. The ROAT was performed on areas of experimentally induced sodium lauryl sulfate dermatitis. The study was double blind, controlled and randomized. RESULTS Nine of the 15 formaldehyde-allergic individuals had reappearance or worsening of dermatitis on the areas that were treated with moisturizers containing formaldehyde. No such reactions were observed in the control group (P < 0·001) or for the moisturizers without formaldehyde in the formaldehyde-allergic individuals (P < 0·001). CONCLUSIONS Our results demonstrate that the low concentrations of formaldehyde often found in skincare products by the CA method are sufficient to worsen an existing dermatitis in formaldehyde-allergic individuals.
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Affiliation(s)
- I Hauksson
- Department of Occupational and Environmental Dermatology, Lund University, Skåne University Hospital, SE-20502, Malmö, Sweden
| | - A Pontén
- Department of Occupational and Environmental Dermatology, Lund University, Skåne University Hospital, SE-20502, Malmö, Sweden
| | - B Gruvberger
- Department of Occupational and Environmental Dermatology, Lund University, Skåne University Hospital, SE-20502, Malmö, Sweden
| | - M Isaksson
- Department of Occupational and Environmental Dermatology, Lund University, Skåne University Hospital, SE-20502, Malmö, Sweden
| | - M Engfeldt
- Department of Occupational and Environmental Dermatology, Lund University, Skåne University Hospital, SE-20502, Malmö, Sweden
| | - M Bruze
- Department of Occupational and Environmental Dermatology, Lund University, Skåne University Hospital, SE-20502, Malmö, Sweden
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27
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Liu L, Benyeda Z, Zohari S, Yacoub A, Isaksson M, Leijon M, LeBlanc N, Benyeda J, Belák S. Assessment of Preparation of Samples Under the Field Conditions and a Portable Real-Time RT-PCR Assay for the Rapid On-Site Detection of Newcastle Disease Virus. Transbound Emerg Dis 2014; 63:e245-50. [PMID: 25209697 DOI: 10.1111/tbed.12261] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [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: 03/30/2014] [Indexed: 02/06/2023]
Abstract
Newcastle disease virus (NDV), also known as virulent forms of avian paramyxovirus serotype 1 (AMPV-1), is the causative agent of Newcastle disease affecting many species of birds and causing heavy losses to the poultry industry worldwide. Early, rapid and sensitive detection of the viruses or the viral nucleic acids is very important for disease diagnosis and control. This study aimed to evaluate sample preparation under field conditions and the application of a real-time RT-PCR method in the portable T-COR4 platform for the rapid, on-site detection of NDV on a farm. In the laboratory setting, the portable real-time RT-PCR assay had a similar performance compared with that obtained with a larger, stationary Rotor Gene real-time thermocycler. In the field conditions, viral nucleic acids were manually extracted just outside of animal units with minimal equipment and real-time RT-PCR detection was performed with the portable thermocycler T-COR4 placed in a nearby room. The portable assay at the farm detected viral RNA in 15 samples and reached an agreement of 83% (39/47) when the same RNA preparations were tested in the Rotor Gene thermocycler under the laboratory setting. The results demonstrated the feasibility of performing field detection but also the need to improve and further simplify sample preparation procedures.
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Affiliation(s)
- L Liu
- Department of Virology, Immunobiology and Parasitology, National Veterinary Institute, Uppsala, Sweden.,The OIE Collaborating Centre for the Biotechnology-based Diagnosis of Infectious Diseases in Veterinary Medicine, Uppsala, Sweden
| | - Z Benyeda
- Prophyl Animal Health Ltd, Mohács, Hungary
| | - S Zohari
- Department of Virology, Immunobiology and Parasitology, National Veterinary Institute, Uppsala, Sweden.,The OIE Collaborating Centre for the Biotechnology-based Diagnosis of Infectious Diseases in Veterinary Medicine, Uppsala, Sweden
| | - A Yacoub
- Department of Virology, Immunobiology and Parasitology, National Veterinary Institute, Uppsala, Sweden.,The OIE Collaborating Centre for the Biotechnology-based Diagnosis of Infectious Diseases in Veterinary Medicine, Uppsala, Sweden
| | - M Isaksson
- Department of Virology, Immunobiology and Parasitology, National Veterinary Institute, Uppsala, Sweden.,The OIE Collaborating Centre for the Biotechnology-based Diagnosis of Infectious Diseases in Veterinary Medicine, Uppsala, Sweden
| | - M Leijon
- Department of Virology, Immunobiology and Parasitology, National Veterinary Institute, Uppsala, Sweden.,The OIE Collaborating Centre for the Biotechnology-based Diagnosis of Infectious Diseases in Veterinary Medicine, Uppsala, Sweden
| | - N LeBlanc
- Department of Virology, Immunobiology and Parasitology, National Veterinary Institute, Uppsala, Sweden.,The OIE Collaborating Centre for the Biotechnology-based Diagnosis of Infectious Diseases in Veterinary Medicine, Uppsala, Sweden
| | - J Benyeda
- Prophyl Animal Health Ltd, Mohács, Hungary
| | - S Belák
- Department of Virology, Immunobiology and Parasitology, National Veterinary Institute, Uppsala, Sweden.,The OIE Collaborating Centre for the Biotechnology-based Diagnosis of Infectious Diseases in Veterinary Medicine, Uppsala, Sweden
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28
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Horev L, Isaksson M, Engfeldt M, Persson L, Ingber A, Bruze M. Preservatives in cosmetics in the Israeli market conform well to the EU legislation. J Eur Acad Dermatol Venereol 2014; 29:761-6. [DOI: 10.1111/jdv.12676] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2014] [Accepted: 07/03/2014] [Indexed: 11/28/2022]
Affiliation(s)
- L. Horev
- Department of Dermatology; Hadassah - Hebrew University Medical Center; Jerusalem Israel
| | - M. Isaksson
- Department of Occupational and Environmental Dermatology; Skane University Hospital. Lund University; Malmö Sweden
| | - M. Engfeldt
- Department of Occupational and Environmental Dermatology; Skane University Hospital. Lund University; Malmö Sweden
| | - L. Persson
- Department of Occupational and Environmental Dermatology; Skane University Hospital. Lund University; Malmö Sweden
| | - A. Ingber
- Department of Dermatology; Hadassah - Hebrew University Medical Center; Jerusalem Israel
| | - M. Bruze
- Department of Occupational and Environmental Dermatology; Skane University Hospital. Lund University; Malmö Sweden
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29
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Pálsson SE, Howard BJ, Bergan TD, Paatero J, Isaksson M, Nielsen SP. A simple model to estimate deposition based on a statistical reassessment of global fallout data. J Environ Radioact 2013; 121:75-86. [PMID: 22476088 DOI: 10.1016/j.jenvrad.2012.03.006] [Citation(s) in RCA: 5] [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] [Subscribe] [Scholar Register] [Received: 12/14/2011] [Revised: 03/03/2012] [Accepted: 03/07/2012] [Indexed: 05/31/2023]
Abstract
Atmospheric testing of nuclear weapons began in 1945 and largely ceased in 1963. Monitoring of the resulting global fallout was carried out globally by the Environmental Measurements Laboratory and the UK Atomic Energy Research Establishment as well as at national level by some countries. A correlation was identified between fallout deposition and precipitation and an uneven distribution with latitude. In this study, the available data from 1954 to 1976 for (90)Sr and (137)Cs were reanalysed using analysis of covariance (ANCOVA) and logarithmically transformed values of the monthly deposition density as the response variable. Generalized additive models (GAM) were used to explore the relationship of different variables to the response variable and quantify the explanatory power that could be achieved. The explanatory variables which consistently explained most of the variability were precipitation at each site, latitude and change with time and a simple linear model was produced with similar explanatory power as the GAM. The estimates improved as the temporal resolution of the precipitation data increased. A good log-log fit could be obtained if a bias of about 1-6 mm precipitation per month was added, this could be interpreted as dry deposition which is not otherwise accounted for in the model. The deposition rate could then be explained as a simple non-linear power function of the precipitation rate (r(0.2-0.6) depending on latitude band). A similar non-linear power function relationship has been the outcome of some studies linking wash-out and rain-out coefficients with rain intensity. Our results showed that the precipitation rate was an important parameter, not just the total amount. The simple model presented here allows the recreation of the deposition history at a site, allowing comparison with time series of activity concentrations for different environmental compartments, which is important for model validation.
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Affiliation(s)
- S E Pálsson
- Icelandic Radiation Safety Authority, Raudararstig 10, IS-150 Reykjavik, Iceland.
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30
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Olausson EA, Brock C, Drewes AM, Grundin H, Isaksson M, Stotzer P, Abrahamsson H, Attvall S, Simrén M. Measurement of gastric emptying by radiopaque markers in patients with diabetes: correlation with scintigraphy and upper gastrointestinal symptoms. Neurogastroenterol Motil 2013; 25:e224-32. [PMID: 23316944 DOI: 10.1111/nmo.12075] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND Scintigraphy, the gold standard to measure gastric emptying, is expensive and not widely available. Therefore, we compared emptying of radiopaque markers (ROM) from the stomach, by use of fluoroscopy, with scintigraphy in patients with insulin-treated diabetes. METHODS On the same day we measured gastric emptying of 20 ROM using fluoroscopy and scintigraphic emptying of a standard solid meal. The subjects also completed a validated gastrointestinal (GI) symptom questionnaire. KEY RESULTS We included 115 patients with insulin-treated diabetes (median age 53, range 21-69 years; 59 women). A moderately strong correlation was demonstrated between scintigraphic (% retained at 2 h) and ROM emptying (markers retained at 6 h) (r = 0.47; P < 0.0001). Eighty-three patients had delayed gastric emptying with scintigraphy, whereas only 29 patients had delayed emptying of ROM. Of the 29 patients with delayed emptying of ROM, 28 also had delayed scintigraphic emptying. The sensitivity and specificity of the ROM test was 34% and 97%, respectively. Significant correlations were only noted between scintigraphic gastric emptying and GI symptom severity, with the strongest correlations for fullness/early satiety (r = 0.34; P < 0.001) and nausea/vomiting (r = 0.30; P < 0.001). CONCLUSIONS & INFERENCES A gastric emptying test with ROM is a widely available screening method to detect delayed gastric emptying in patients with diabetes, where a positive result seems reliable. However, a normal ROM test does not exclude delayed gastric emptying, and if the clinical suspicion of gastroparesis remains, scintigraphy should be performed. Results from scintigraphy also correlate with GI symptom severity, which ROM test did not.
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Affiliation(s)
- E A Olausson
- Department of Internal Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
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31
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Ström Holst B, Hagberg Gustavsson M, Grapperon-Mathis M, Lilliehöök I, Johannisson A, Isaksson M, Lindhe A, Axnér E. Canine Herpesvirus During Pregnancy and Non-Pregnant Luteal Phase. Reprod Domest Anim 2012; 47 Suppl 6:362-5. [DOI: 10.1111/rda.12099] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
| | - M Hagberg Gustavsson
- Department of Clinical Sciences; Swedish University of Agricultural Sciences; Uppsala; Sweden
| | - M Grapperon-Mathis
- Section of Diagnostic Imaging; University Animal Hospital; Uppsala; Sweden
| | - I Lilliehöök
- Clinical Pathology Laboratory; University Animal Hospital; Swedish University of Agricultural Sciences; Uppsala; Sweden
| | | | - M Isaksson
- National Veterinary Institute; Uppsala; Sweden
| | - A Lindhe
- National Veterinary Institute; Uppsala; Sweden
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32
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Nilsson J, Isaksson M. A comparison between Monte Carlo-calculated and -measured total efficiencies and energy resolution for large plastic scintillators used in whole-body counting. Radiat Prot Dosimetry 2011; 144:555-559. [PMID: 21044997 DOI: 10.1093/rpd/ncq340] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The measured total efficiency for several source positions has been determined for a large, plastic scintillation detector (NE 102A, 91.5 × 76.0 × 24.5 cm(3)) used for whole-body counting gamma spectrometry. The results have been compared with Monte Carlo-calculated total efficiencies; the code used was MCNPX 2.60. For (137)Cs, there was a good agreement between the measured and calculated total efficiencies. MXNPX was also used to calculate the electron light yield for (137)Cs; for the detector material NE 102A, Birks' constant kB was found to be 9.6 mg cm(-2) MeV(-1). The effect of light losses on spectrum resolution has been investigated for (65)Zn.
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Affiliation(s)
- J Nilsson
- Department of Radiation Physics, Institute of Clinical Sciences, The Sahlgrenska Academy, University of Gothenburg, SU/Sahlgrenska, 413 45 Gothenburg, Sweden
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33
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Hauksson I, Pontén A, Gruvberger B, Isaksson M, Bruze M. Clinically relevant contact allergy to formaldehyde may be missed by testing with formaldehyde 1·0%. Br J Dermatol 2011; 164:568-72. [DOI: 10.1111/j.1365-2133.2010.10151.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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34
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Goon A, Bruze M, Zimerson E, Sörensen Ö, Goh C, Koh D, Isaksson M. Variation in allergen content over time of acrylates/methacrylates in patch test preparations. Br J Dermatol 2010; 164:116-24. [DOI: 10.1111/j.1365-2133.2010.10087.x] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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35
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Johansson H, Isaksson M, Sörqvist EF, Roos F, Stenberg J, Sjöblom T, Botling J, Micke P, Edlund K, Fredriksson S, Kultima HG, Ericsson O, Nilsson M. Targeted resequencing of candidate genes using selector probes. Nucleic Acids Res 2010; 39:e8. [PMID: 21059679 PMCID: PMC3025563 DOI: 10.1093/nar/gkq1005] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Targeted genome enrichment is a powerful tool for making use of the massive throughput of novel DNA-sequencing instruments. We herein present a simple and scalable protocol for multiplex amplification of target regions based on the Selector technique. The updated version exhibits improved coverage and compatibility with next-generation-sequencing (NGS) library-construction procedures for shotgun sequencing with NGS platforms. To demonstrate the performance of the technique, all 501 exons from 28 genes frequently involved in cancer were enriched for and sequenced in specimens derived from cell lines and tumor biopsies. DNA from both fresh frozen and formalin-fixed paraffin-embedded biopsies were analyzed and 94% specificity and 98% coverage of the targeted region was achieved. Reproducibility between replicates was high (R2 = 0, 98) and readily enabled detection of copy-number variations. The procedure can be carried out in <24 h and does not require any dedicated instrumentation.
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Affiliation(s)
- H Johansson
- Department of Genetics and Pathology, Uppsala University, Rudbeck Laboratory, Uppsala, Sweden
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36
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Malinauskiene L, Bruze M, Ryberg K, Zimerson E, Isaksson M. Late patch test reaction to Disperse Orange 1 not related to active sensitization. Contact Dermatitis 2010; 63:298-9. [DOI: 10.1111/j.1600-0536.2010.01810.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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37
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38
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Arnason U, Lima-de-Faria A, Granström H, Isaksson M. Analysis of cetacean DNA. II. Localization of 18S and 28S ribosomal RNA cistrons in a heavy DNA component. Hereditas 2009; 87:67-76. [PMID: 591358 DOI: 10.1111/j.1601-5223.1977.tb01247.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
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39
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Ryberg K, Goossens A, Isaksson M, Gruvberger B, Zimerson E, Nilsson F, Björk J, Hindsén M, Bruze M. Is contact allergy to disperse dyes and related substances associated with textile dermatitis? Br J Dermatol 2009; 160:107-15. [DOI: 10.1111/j.1365-2133.2008.08953.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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40
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Netterlid E, Bruze M, Hindsén M, Isaksson M, Olin P. FS02.7
Rates of persistent itchy nodules after fourth dose of DT vaccines. Contact Dermatitis 2008. [DOI: 10.1111/j.0105-1873.2004.0309y.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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41
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Frick M, Zimerson E, Karlsson D, Mar Å, Skarping G, Isaksson M, Bruze M. FS12.5
Chemical analysis of MDI in petrolatum patch test preparations. Contact Dermatitis 2008. [DOI: 10.1111/j.0105-1873.2004.0309de.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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42
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Svedman C, Isaksson M, Zimerson E, Bruze M. FC01.2
Contact allergy to grease-a case report. Contact Dermatitis 2008. [DOI: 10.1111/j.0105-1873.2004.0309as.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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43
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Lima-de-Faria A, Essen-Möller J, Müntzing A, Granström H, Olsson E, Isaksson M. Comparison of DNA cleavage in rye with and without B chromosomes. Hereditas 2008; 99:203-8. [PMID: 6668206 DOI: 10.1111/j.1601-5223.1983.tb00892.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
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44
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Almgren S, Isaksson M, Barregard L. Gamma radiation doses to people living in Western Sweden. J Environ Radioact 2008; 99:394-403. [PMID: 18069099 DOI: 10.1016/j.jenvrad.2007.10.020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2007] [Revised: 10/01/2007] [Accepted: 10/29/2007] [Indexed: 05/25/2023]
Abstract
Indoor environments contribute to gamma radiation in the general population. The aims of the present study were to investigate average gamma radiation doses in a rural and an urban area of Sweden, compare indoor dose rates with personal exposure, and study the effects of building characteristics on radiation levels. Radiation was measured with thermoluminescence dosimeters (TLDs). Repeated measurements were performed with TLDs worn by participants (n=46) and placed in their dwellings. Personal dose rates were 0.092microSv/h (rural) and 0.096microSv/h (urban). The mean effective gamma dose rates in dwellings were 0.091microSv/h (rural) and 0.11microSv/h (urban), which are higher than the world average. Dose rates in apartments were higher than in detached houses and higher for concrete than wooden dwellings. Personal dose rates were strongly associated with dwelling dose rates (r(p)=0.68, p<0.01) and could be modelled. Within-participant variability was low.
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Affiliation(s)
- S Almgren
- Department of Radiation Physics, Göteborg University, SU/Sahlgrenska, SE-413 45 Göteborg, Sweden.
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45
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Isaksson M, Siemund I, Bruze M. Allergic contact dermatitis from ethylcyanoacrylate in an office worker with artificial nails led to months of sick leave. Contact Dermatitis 2007; 57:346-7. [DOI: 10.1111/j.1600-0536.2007.01133.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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46
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Escutenaire S, Isaksson M, Renström LHM, Klingeborn B, Buonavoglia C, Berg M, Belák S, Thorén P. Characterization of divergent and atypical canine coronaviruses from Sweden. Arch Virol 2007; 152:1507-14. [PMID: 17533554 PMCID: PMC7087124 DOI: 10.1007/s00705-007-0986-1] [Citation(s) in RCA: 22] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2006] [Accepted: 04/18/2007] [Indexed: 11/30/2022]
Abstract
Field canine coronaviruses (CCVs) identified during a series of outbreaks of gastroenteritis in Swedish dogs were subjected to genetic analysis involving the open reading frame 1b (ORF1b) and the membrane (M) and spike (S) protein genes. Four field viruses originating from the Stockholm region presented identical sequences and segregated separately from other CCVs characterized so far and from GOT/05, the variant recovered in Western Sweden. A recombinant origin of the fifth virus identified in the Stockholm region is suggested. In addition, the five viruses originating from the same geographical area displayed atypical 5′ S gene sequences.
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Affiliation(s)
- S Escutenaire
- Department of Virology, National Veterinary Institute (SVA), Uppsala, Sweden.
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Escutenaire S, Mohamed N, Isaksson M, Thorén P, Klingeborn B, Belák S, Berg M, Blomberg J. SYBR Green real-time reverse transcription-polymerase chain reaction assay for the generic detection of coronaviruses. Arch Virol 2006; 152:41-58. [PMID: 16941059 PMCID: PMC7087200 DOI: 10.1007/s00705-006-0840-x] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2006] [Accepted: 07/12/2006] [Indexed: 12/02/2022]
Abstract
Coronaviruses are etiologic agents of respiratory and enteric diseases in humans and in animals. In this study, a one-step real-time reverse transcription-polymerase chain reaction (RT-PCR) assay based on SYBR Green chemistry and degenerate primers was developed for the generic detection of coronaviruses. The primers, designed in the open reading frame 1b, enabled the detection of 32 animal coronaviruses including strains of canine coronavirus, feline coronavirus, transmissible gastroenteritis virus (TGEV), bovine coronavirus (BCoV), murine hepatitis virus (MHV) and infectious bronchitis virus (IBV). A specific amplification was also observed with the human coronaviruses (HCoV) HCoV-NL63, HCoV-OC43, HCoV-229E and severe acute respiratory syndrome coronavirus (SARS-CoV). The real-time RT-PCR detected down to 10 cRNA copies from TGEV, BCoV, SARS-CoV and IBV. In addition, the assay exhibited a high sensitivity and specificity on clinical samples from different animal species. The developed assay represents a potential tool for laboratory diagnostics and for detecting still uncharacterized coronaviruses.
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Affiliation(s)
- S Escutenaire
- Department of Virology, National Veterinary Institute, Uppsala, Sweden
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Rahman M, Zhu D, Lindblad C, Johansson IM, Holmberg E, Isaksson M, Taube M, Bäckström T, Wang MD. GABA-site antagonism and pentobarbital actions do not depend on the alpha-subunit type in the recombinant rat GABA receptor. Acta Physiol (Oxf) 2006; 187:479-88. [PMID: 16866778 DOI: 10.1111/j.1748-1716.2006.01593.x] [Citation(s) in RCA: 9] [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: 11/26/2022]
Abstract
AIM The roles of alpha-subunits on the gamma-aminobutyric acid (GABA)-site antagonism and pentobarbital actions were examined in rat recombinant GABA(A) receptors in Xenopus oocytes. METHODS Experiments were performed with binary and ternary GABA(A) receptors containing alpha1-, alpha4- or alpha5-subunit by the two-electrode voltage-clamp technique. RESULTS The potency of GABA was significantly higher in the alpha1beta2, alpha4beta2 and alpha5beta2 receptors compared with the alpha1beta2gamma2L, alpha4beta2gamma2L and alpha5beta2gamma2L receptors. However, the alpha5beta2 receptor possessed significantly lower GABA efficacy compared with the alpha5beta2gamma2L receptor. While the gamma2-subunit was essential to the potency of GABA, its influence on the apparent GABA-site antagonism was less profound. The antagonist affinity constants (K(B)) of bicuculline inhibition and slopes of Schild plots were similar between all types of ternary and binary receptors except alpha5beta2 receptor which was not tested. The pK(B)s and IC(50)s of the GABA-site antagonism were not significantly different between the alpha1beta2gamma2L, alpha4beta2gamma2L and alpha5beta2gamma2L receptors. Bicuculline blocked pentobarbital-activated currents in a reversible and non-competitive manner with the alpha1beta2gamma2L, alpha4beta2gamma2L, and alpha5beta2gamma2L receptors, indicating an allosteric inhibition of the GABA-site. No significant difference of bicuculline potencies in inhibiting GABA- and pentobarbital-activated currents was found between the alpha1beta2gamma2L, alpha4beta2gamma2L and alpha5beta2gamma2L receptors. CONCLUSION The GABA-site antagonism does not depend on the subtype of alpha-subunits. Similarly, pentobarbital activates ternary receptors composed of different alpha-subunits in a bicuculline-sensitive manner. The potencies of bicuculline to inhibit pentobarbital-activated currents are identical with receptors containing alpha1, alpha4 or alpha5-subunit. The alpha1beta2 and alpha4beta2 receptors possess higher GABA potencies compared with the alpha1beta2gamma2L and alpha4beta2gamma2L receptors.
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Affiliation(s)
- M Rahman
- Department of Clinical Science, Umeå Neurosteroid Research Center, Obstetrics and Gynecology, Umeå University, Umeå, Sweden
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Abstract
Contact allergy to disperse dyes in textiles is documented in prevalence studies from southern Europe. To evaluate the prevalence of allergic patch test reactions to different textile dyes in southern Sweden, and to look at the sites of dermatitis in individuals hypersensitive to textile dyes, we retrospectively investigated 3325 consecutively patch-tested patients. They had all been patch tested with the standard test series supplemented with a textile dye mix (TDM) consisting of 8 disperse dyes, i.e. Disperse (D) Blue 35, 106 and 124, D Yellow 3, D Orange 1 and 3 and D Red 1 and 17. All but 3 of the TDM-positive patients were additionally tested with the separate dyes included in the mix. The frequency of contact allergy to TDM was 1.5%, which is comparable with studies from southern Europe. The most common dye allergen was D Orange 1. The high prevalence of allergic reactions to D Orange 1 was unexpected, whereas test reactions to D Blue 106 and 124 were lower than expected from other studies. Compared to all tested patients, the TDM-positive patients more often had dermatitis on their arms, face, neck and axillary folds, and women also had a higher frequency of hand dermatitis.
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Affiliation(s)
- K Ryberg
- Department of Occupational and Environmental Dermatology, Lund University, Lund, Sweden.
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50
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Rasmussen K, Carstensen O, Pontén A, Gruvberger B, Isaksson M, Bruze M. Risk of contact allergy and dermatitis at a wind turbine plant using epoxy resin-based plastics. Int Arch Occup Environ Health 2005; 78:211-7. [PMID: 15739094 DOI: 10.1007/s00420-004-0575-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2004] [Accepted: 09/09/2004] [Indexed: 10/25/2022]
Abstract
AIMS To identify workplace and individual risk factors for occupational contact allergy and dermatitis. METHODS A cross-sectional study was carried out at an international company producing wind turbine systems in Denmark. A cohort of 724 production workers at four facilities was highly exposed to epoxy resin as well as other chemicals. A screening questionnaire (participation rate 84.7%) was followed by an interview by an occupational physician and a dermatological examination, including patch testing, for a comprehensive list of potential workplace sensitizers. RESULTS Clinically diagnosed dermatitis was found among 214 workers (35.8%) and contact allergy to materials used in the workplace was found in 66 workers (10.9% of the total population and 20.3% of those who underwent patch testing). Of the 66 workers with a work-related allergy, 40 (60.6%) were allergic to epoxy compounds, 25 (37.9%) to hardeners and ten (15.2%) to other workplace materials, where one person showed an allergy only to these materials. Experiencing contact allergy was related to older age and longer employment in the workplace-however, neither of these risk factors was significant. The main risk factor for current dermatitis was contact allergy to materials used in the workplace, determined by patch testing, OR=5.4 (95% CI 3.9-9.9). Fewer days of absence from work was also related to current dermatitis, OR=2.0 (95% CI 1.2-3.5). CONCLUSIONS In a cohort of workers with extensive exposure to chemicals related to epoxy-resin systems, contact dermatitis and allergy was prevalent. Older age and longer duration of employment at the workplace were individual risk factors for allergy to workplace materials, whilst work-related allergies and longer duration of employment at the workplace were significant risk factors for current dermatitis.
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Affiliation(s)
- K Rasmussen
- Department of Occupational Medicine, Herning Hospital, 7400, Herning, Denmark.
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