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- Danielsson, Christian, et al.
(författare)
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Exploration of human, rat, and rabbit embryonic cardiomyocytes suggests K-channel block as a common teratogenic mechanism
- 2013
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Ingår i: Cardiovascular Research. - : Oxford University Press (OUP): Policy B. - 0008-6363 .- 1755-3245. ; 97:1, s. 23-32
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Tidskriftsartikel (refereegranskat)abstract
- Several drugs blocking the rapidly activating potassium (K-r) channel cause malformations (including cardiac defects) and embryonic death in animal teratology studies. In humans, these drugs have an established risk for acquired long-QT syndrome and arrhythmia. Recently, associations between cardiac defects and spontaneous abortions have been reported for drugs widely used in pregnancy (e.g. antidepressants), with long-QT syndrome risk. To investigate whether a common embryonic adverse-effect mechanism exists in the human, rat, and rabbit embryos, we made a comparative study of embryonic cardiomyocytes from all three species. less thanbrgreater than less thanbrgreater thanPatch-clamp and quantitative-mRNA measurements of K-r and slowly activating K (K-s) channels were performed on human, rat, and rabbit primary cardiomyocytes and cardiac samples from different embryo-foetal stages. The K-r channel was present when the heart started to beat in all species, but was, in contrast to human and rabbit, lost in rats in late organogenesis. The specific K-r-channel blocker E-4031 prolonged the action potential in a species- and development-dependent fashion, consistent with the observed K-r-channel expression pattern and reported sensitive periods of developmental toxicity. E-4031 also increased the QT interval and induced 2:1 atrio-ventricular block in multi-electrode array electrographic recordings of rat embryos. The K-s channel was expressed in human and rat throughout the embryo-foetal period but not in rabbit. less thanbrgreater than less thanbrgreater thanThis first comparison of mRNA expression, potassium currents, and action-potential characteristics, with and without a specific K-r-channel blocker in human, rat, and rabbit embryos provides evidence of K-r-channel inhibition as a common mechanism for embryonic malformations and death.
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| 2. |
- Grinnemo, Karl-Henrik, et al.
(författare)
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Costimulation blockade induces tolerance to HESC transplanted to the testis and induces regulatory T-cells to HESC transplanted into the heart
- 2008
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Ingår i: Stem Cells. - : Oxford University Press (OUP). - 1549-4918 .- 1066-5099. ; 26:7, s. 1850-1857
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Tidskriftsartikel (refereegranskat)abstract
- In order to study the ability of costimulation blockade to induce tolerance to human embryonic stem cells (HESC), severe combined immunodeficient (SCID), and immunocompetent C57BL/6 mice treated with costimulation blockade received intratesticular and intramyocardial HESC transplants. All SCID mice with intratesticular HESC transplants developed teratoma. When SCID mice were transplanted intramyocardially, only two of five mice developed teratoma-like tumors. C57BL/6 mice transplanted intratesticularly and treated with costimulation blockade all developed teratoma and were surrounded by CD4(+)CD25(+)Foxp3(+) T-cells, while isotype control treated recipients rejected their grafts. Most C57BL/6 mice transplanted intramyocardially and treated with costimulation blockade demonstrated lymphocytic infiltrates 1 month after transplantation, whereas one maintained its graft. Isolation of regulatory T-cells from intramyocardial transplanted recipients treated with costimulation blockade demonstrated specificity toward undifferentiated HESC and down-regulated naive T-cell activation toward HESC. These results demonstrate that costimulation blockade is sufficiently robust to induce tolerance to HESC in the immune-privileged environment of the testis. HESC specific regulatory T-cells developed to HESC transplanted to the heart and the success of transplantation was similar to that seen in SCID mice.
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| 3. |
- Ahrenberg, Lars, 1948-, et al.
(författare)
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Studying Disability Related Terms with Swe-Clarin Resources
- 2019
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Konferensbidrag (refereegranskat)abstract
- In Swedish, as in other languages, the words used to refer to disabilities and people with disabilities are manifold. Recommendations as to which terms to use have been changed several times over the last hundred years. In this exploratory paper we have used textual resources provided by Swe-Clarin to study such changes quantitatively. We demonstrate that old and new recommendations co-exist for long periods of time, and that usage sometimes converges.
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| 4. |
- Allodi Westling, Mara, 1959-, et al.
(författare)
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Discussing Projects in Special Education Directed Towards Early Interventions in Childhood Education in the Swedish Context
- 2019
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Ingår i: Research to Practice in Early Intervention.
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- In Sweden, Early Childhood Education and Care is a right for every child and children in need of special support have access to these provisions in inclusive mainstream settings. National evaluations show great quality variations in special educational support in preschools and schools across the country. A Multicenter Research School with 10 PhD students from four Universities and international partners has been funded (2018- 2021) by the Swedish Research Council to develop knowledge in early intervention. Preschool/school environments are assessed and tailored interventions at unit or child level are developed. The projects are built on previous research and identified needs in research and practice. The theoretical framework for the Research School will be described, results from a systematic review of previous research and specific plans for various topics (engagement, early literacy, expressive language development, socio- emotional development, self-regulation) will be presented and linked to the theoretical framework.
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| 5. |
- Almqvist, Lena, et al.
(författare)
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Longitudinal Typical Patterns of Behaviour and Engagement of Children with Swedish or Other Ethnicity and the Impact of Special Support in Swedish Preschools
- 2019
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Konferensbidrag (refereegranskat)abstract
- It is of concern that some children, even at a young age, are less engaged than others. Findings indicate that children of other ethnicities are less engaged in preschool activities than their Swedish peers. They also more commonly display behaviour difficulties. Such negative patterns tend to be stable over time. Provision of special support in preschool could change this; however children of other ethnicities have been found to be less supported in preschool, compared to Swedish children. This study aimed to explore longitudinal typical patterns of engagement and behaviour of children of Swedish and other ethnicities in Swedish preschools and the association with special support provision. Data were collected at three time points (n=197; 110 boys; 48 of other ethnicities; 15-57 months). A longitudinal pattern analysis revealed five stable types, examined regarding the influence of provision of support and proportion of children with other ethnicities.
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| 9. |
- Andreassen, Maria, et al.
(författare)
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An interactive digital calendar with mobile phone reminders (RemindMe) for people with cognitive impairment : A pilot randomized controlled trial
- 2022
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Ingår i: Scandinavian Journal of Occupational Therapy. - : Informa UK Limited. - 1103-8128 .- 1651-2014. ; 29:4, s. 270-281
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Tidskriftsartikel (refereegranskat)abstract
- Background: People with cognitive impairment often need support to perform everyday-life activities. Interventions are available, but evidence-based interventions are lacking.Aim: This pilot RCT aimed to investigate use of an intervention with an interactive digital calendar with mobile phone reminders (RemindMe) in relation to change in outcomes and impact on occupational performance, independence, health-related quality of life, and psychosocial impact of the support for people with cognitive impairment.Method: The study design was a multi-centre parallel-group pilot RCT [ClinicalTrails.gov, identifier: NCT04470219]. Fifteen participants from primary rehabilitation centres in Sweden were recruited and randomly assigned to intervention group (n = 8) receiving the intervention with RemindMe, or control group (n = 7) receiving usual treatment by an occupational therapist. Data were collected at baseline, after two- and four months, and analysed using descriptive and non-parametric statistics.Result: The Canadian Occupational Performance Measure (COPM), and the Functional Independence Measure (FIM item n-r) showed significant differences. There were no significant differences in health-related quality of life nor in the psychosocial impact of the used support.Conclusion: Plausible changes in outcome measures were found in COPM and FIM (items n-r). These instruments indicate change in outcome measures and impact on occupational performance and independence.
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| 10. |
- Andreassen, Maria, 1966-
(författare)
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Digital support for people with cognitive impairment : An intervention to increase the occupational performance in everyday life
- 2021
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Introduction: Senior people with cognitive impairment may experience an inability to manage everyday life due to difficulties related to time management, and planning and structuring everyday life. These difficulties can affect people negatively, for example not remembering to carry out future planned activities. Interventions that compensate for lost cognitive ability often include using assistive technology for cognition (ATC). By investigating the feasibility and potential effects of an intervention with the interactive digital calendar with active reminders, RemindMe, knowledge can be generated about aspects of learning to use and using digital support. Further, knowledge can also be generated about occupations in everyday life that people need to receive reminders for, both during the rehabilitation period and two years after the rehabilitation period. This knowledge can support building evidence-based interventions in rehabilitation for people with cognitive impairment using digital technology. Aim: The overall aim of this thesis was to study an interactive digital calendar with mobile phone reminders (RemindMe) for people with cognitive impairment, as support to increase the occupational performance in everyday life. Methods: This thesis includes four studies, using both qualitative and quantitative data collection methods. Study I was a focus group interview, exploring twenty senior people aged between 66 and 85 and their experiences of learning to use and using RemindMe in everyday life. The seniors had used RemindMe for six weeks and had received weekly support calls from a research assistant during the study period. After six weeks, the participants took part in focus group interviews. Four focus group interviews were conducted, analysed with content analyses. The use of RemindMe and feasibility aspects were also investigated in study II with a mixed-methods design. Eight patients with cognitive impairment, aged between 26–68, and seven occupational therapists participated. The occupational therapists were experienced in occupational therapy and were working at three different outpatient rehabilitation clinics in southeast Sweden. They had a median of 20 years of experience (range of 2–25 years). The patients received an introduction to using RemindMe, as well as weekly support calls from occupational therapists or a research assistant for eight weeks. Quantitative data was collected using the Quebec User Evaluation of Satisfaction with Assistive Technology 2.0 (QUEST 2.0). The frequency of and the actual use of RemindMe was generated by RemindMe. Qualitative data was collected via face-to-face interviews with occupational therapists, via field notes from the weekly support conversations, and during the assessments with patients with cognitive impairment. Analyses were conducted using descriptive statistics and directive deductive content analyses. Study III investigated the intervention with RemindMe, addressing plausible outcome measures by investigating changes in outcomes, impact on occupational performance, independence, health-related quality of life, and the psychosocial impact of support used for people with cognitive impairment. The design was a pilot randomized controlled trial with fifteen patients, with cognitive impairment, aged between 26–79, randomized to either an intervention group or a control group. The intervention group consisted of eight patients and the control group of seven patients. The outcome measures were assessed using the Canadian Occupational Performance Measure (COPM), the Functional Independence Measure (FIM), the EuroQol 5-Dimension Visual Analog Scale (EQ-5D-VAS), and the Psychosocial Impact of Assistive Devices Scale (PIADS). Study III was registered at ClinicalTrails.gov, identifier: NCT04470219. Study IV explored seven patients, aged between 51–71, experiences of strategies and support used to establish a new everyday life and their experience of support for time management and planning and structuring everyday life due to cognitive impairment. The study was a qualitative, semi-structured, face-to-face interview. The interviews were analysed with inductive content analysis. Results: The results of this thesis address learning to use and using assistive technology for cognition (ATC) in everyday life and outcomes from using RemindMe. The participants were accustomed to using calendars. However, there were differences in terms of whether they preferred to use “low tech” calendars (such as paper calendars), or “high tech” calendars (for example, digital calendars with reminders), or whether a combination of “low and high tech” was preferred (Studies I and IV). Other support strategies were also described, for example, the conscious use of objects as reminders in the home environment or everyday life routines (Study IV). Participants were positive towards the use of digital technology, especially mobile phones/smartphones that they easily can carry with them (Studies I and IV). Participants also described the advantage of using digital technology with active reminders and audio prompts, signalling, and telling them when to do something. This was described as the reminder “talks to me” (Study I). The actual use of RemindMe showed that reminders were for example used for taking medication, do exercises, or meeting family or friends (Study II). Occupational therapists in Study II described that their patients benefited from using reminders and that patients have to be active in their everyday life and perceive a need for reminders. The outcomes from measurements of occupational performance (COPM) indicate that patients in the intervention group increased their occupational performance and their satisfaction with their performance compared with the control group. The intervention group also increased their independence (FIM) in the communication and social and intellectual abilities subscales (Study III). Conclusions: The results indicate the importance of choosing a reminder that is suited to the patient’s needs, and this reminder can be either “low tech” or “high tech”. The important thing is that the reminder matches the patient’s needs. The result also indicates that for people with cognitive impairment to make full use of the reminder in everyday life, support with learning to use and using the device for a longer period is needed. Participants (Studies II, III, and IV) described scheduling and receiving active reminders as important for achieving a feeling of comfort and security. Another technique was to find habits and routines or objects to support time management and planning and structuring everyday life. Having a sense of comfort and security involved being in control of everyday life. It can be understood as people talking about being fully involved in their life situations, and in that sense as experiencing participation. However, this was s not investigated in the present studies. Two years after the rehabilitation period, digital or paper calendars were used to establish a new everyday life. Active reminders were trusted and resulted in a feeling of comfort and security as well as a sense of control and independence in everyday life.
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