| 1. |
- Adermark, Louise, 1974, et al.
(författare)
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Weight gain and neuroadaptations elicited by high fat diet depend on fatty acid composition.
- 2021
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Ingår i: Psychoneuroendocrinology. - : Elsevier BV. - 1873-3360 .- 0306-4530. ; 126
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Tidskriftsartikel (refereegranskat)abstract
- Overconsumption of food is a major health concern in the western world. Palatable food has been shown to alter the activity of neural circuits, and obesity has been linked to alterations in the connectivity between the hypothalamus and cortical regions involved in decision-making and reward processing, putatively modulating the incentive value of food. Outlining neurophysiological adaptations induced by dietary intake of high fat diets (HFD) is thus valuable to establish how the diet by itself may promote overeating. To this end, C57BL/6 mice were fed HFD rich in either saturated fatty acids (HFD-S) or polyunsaturated fatty acids (HFD-P), or a low-fat control diet (LFD) for four weeks. Food and energy intake were monitored and ex vivo electrophysiology was employed to assess neuroadaptations in lateral hypothalamus (LH) and corticostriatal circuits, previously associated with food intake. In addition, the effects of dietary saturated and polyunsaturated fatty acids on the gene expression of NMDA, AMPA and GABAA receptor subunits in the hypothalamus were investigated. Our data shows that mice fed HFD-P had increased daily food and energy intake compared with mice fed HFD-S or LFD. However, this increase in energy intake had no obesogenic effects. Electrophysiological recordings demonstrated that HFD-P had a selective effect on glutamatergic neurotransmission in the LH, which was concomitant with a change in mRNA expression of AMPA receptor subtypes Gria1, Gria3 and Gria4, with no effect on the mRNA expression of NMDA receptor subtypes or GABAA receptor subtypes. Furthermore, while synaptic output from corticostriatal subregions was not significantly modulated by diet, synaptic plasticity in the form of long-term depression (LTD) was impaired in the dorsomedial striatum of mice fed HFD-S. In conclusion, this study suggests that the composition of fatty acids in the diet not only affects weight gain, but may also modulate neuronal function and plasticity in brain regions involved in food intake.
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| 2. |
- Hammarlund, Maria, et al.
(författare)
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The Alpha 7 Nicotinic Acetylcholine Receptor Does Not Affect Neonatal Brain Injury
- 2022
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Ingår i: Biomedicines. - : MDPI AG. - 2227-9059. ; 10:8
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Tidskriftsartikel (refereegranskat)abstract
- Inflammation plays a central role in the development of neonatal brain injury. The alpha 7 nicotinic acetylcholine receptor (alpha 7nAChR) can modulate inflammation and has shown promising results as a treatment target in rodent models of adult brain injury. However, little is known about the role of the alpha 7nAChR in neonatal brain injury. Hypoxic-ischemic (HI) brain injury was induced in male and female C57BL/6 mice, alpha 7nAChR knock-out (KO) mice and their littermate controls on postnatal day (PND) 9-10. C57BL/6 pups received i.p. injections of alpha 7nAChR agonist PHA 568487 (8 mg/kg) or saline once daily, with the first dose given directly after HI. Caspase-3 activity and cytokine mRNA expression in the brain was analyzed 24 h after HI. Motor function was assessed 24 and 48 h after HI, and immunohistochemistry was used to assess tissue loss at 24 h and 7 days after HI and microglial activation 7 days after HI. Activation of alpha 7nAChR with the agonist PHA 568487 significantly decreased CCL2/MCP-1, CCL5/RANTES and IL-6 gene expression in the injured brain hemisphere 24 h after HI compared with saline controls in male, but not female, pups. However, alpha 7nAChR activation did not alter caspase-3 activity and TNF alpha, IL-1 beta and CD68 mRNA expression. Furthermore, agonist treatment did not affect motor function (24 or 48 h), neuronal tissue loss (24 h or 7 days) or microglia activation (7 days) after HI in either sex. Knock-out of alpha 7nAChR did not influence neuronal tissue loss 7 days after HI. In conclusion, targeting the alpha 7nAChR in neonatal brain injury shows some effect on dampening acute inflammatory responses in male pups. However, this does not lead to an effect on overall injury outcome.
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| 3. |
- Hammarlund, Maria, et al.
(författare)
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The selective alpha7 nicotinic acetylcholine receptor agonist AR‑R17779 does not affect ischemia-reperfusion brain injury in mice.
- 2021
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Ingår i: Bioscience reports. - 1573-4935. ; 41:6
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Tidskriftsartikel (refereegranskat)abstract
- Inflammation plays a central role in stroke-induced brain injury. The alpha7 nicotinic acetylcholine receptor (α7nAChR) can modulate immune responses in both the periphery and the brain. The aims of this study were to investigate α7nAChR expression in different brain regions and evaluate the potential effect of the selective α7nAChR agonist AR-R17779 on ischemia-reperfusion brain injury in mice. Droplet digital PCR (ddPCR) was used to evaluate the absolute expression of the gene encoding α7nAChR (Chrna7) in hippocampus, striatum, thalamus and cortex in adult, naïve mice. Mice subjected to transient middle cerebral artery occlusion (tMCAO) or sham surgery were treated with α7nAChR agonist AR-R17779 (12 mg/kg) or saline once daily for five days. Infarct size and microglial activation seven days after tMCAO were analyzed using immunohistochemistry. Chrna7 expression was found in all analyzed brain regions in naïve mice, with the highest expression in cortex and hippocampus. At sacrifice, white blood cell count was significantly decreased in AR-R17779 treated mice compared with saline controls in the sham groups, although, no effect was seen in the tMCAO groups. Brain injury and microglial activation was evident seven days after tMCAO. However, no difference was found between mice treated with saline or AR‑R17779. In conclusion, α7nAChR expression varies in different brain regions and, despite a decrease in white blood cells in sham mice receiving AR-R17779, this compound does not affect stroke-induced brain injury.
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| 4. |
- Henoch, Ingela, 1956, et al.
(författare)
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The Swedish Version of the Frommelt Attitude Toward Care of the Dying Scale : Aspects of Validity and Factors Influencing Nurses' and Nursing Students' Attitudes.
- 2014
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Ingår i: Cancer Nursing. - : Lippincott Williams & Wilkins. - 0162-220X .- 1538-9804. ; 37:1, s. E1-E11
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND:: Nurses' attitudes toward caring for dying persons need to be explored. The Frommelt Attitude Toward Care of the Dying (FATCOD) scale has not previously been used in Swedish language. OBJECTIVES:: The objectives of this study were to compare FATCOD scores among Swedish nurses and nursing students with those from other languages, to explore the existence of 2 subscales, and to evaluate influences of experiences on attitudes toward care of dying patients. METHODS:: A descriptive, cross-sectional, and predictive design was used. The FATCOD scores of Swedish nurses from hospice, oncology, surgery clinics, and palliative home care and nursing students were compared with published scores from the United States, Israel, and Japan. Descriptive statistics, t tests, and factor and regression analyses were used. RESULTS:: The sample consisted of 213 persons: 71 registered nurses, 42 enrolled nurses, and 100 nursing students. Swedish FATCOD mean scores did not differ from published means from the United States and Israel, but were significantly more positive than Japanese means. In line with Japanese studies, factor analyses yielded a 2-factor solution. Total FATCOD and subscales had low Cronbach α's. Hospice and palliative team nurses were more positive than oncology and surgery nurses to care for dying patients. CONCLUSIONS:: Although our results suggest that the Swedish FATCOD may comprise 2 distinct scales, the total scale may be the most adequate and applicable for use in Sweden. Professional experience was associated with nurses' attitudes toward caring for dying patients. IMPLICATION FOR PRACTICE:: Care culture might influence nurses' attitudes toward caring for dying patients; the benefits of education need to be explored.
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| 5. |
- Henoch, Ingela, et al.
(författare)
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The Swedish version of the Frommelt Attitude Toward Care of the Dying Scale (FATCOD) : Aspects of validity and factors influencing nurses' and nursing students' attitudes
- 2014
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Ingår i: Cancer Nursing. - : Lippincott Williams & Wilkins. - 0162-220X .- 1538-9804. ; 37:1
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Tidskriftsartikel (refereegranskat)abstract
- Background: Nurses' attitudes toward caring for dying persons need to be explored. The Frommelt Attitude Toward Care of the Dying (FATCOD) scale has not previously been used in Swedish language.Objectives: The objectives of this study were to compare FATCOD scores among Swedish nurses and nursing students with those from other languages, to explore the existence of 2 subscales, and to evaluate influences of experiences on attitudes toward care of dying patients.Methods: A descriptive, cross-sectional, and predictive design was used. The FATCOD scores of Swedish nurses from hospice, oncology, surgery clinics, and palliative home care and nursing students were compared with published scores from the United States, Israel, and Japan. Descriptive statistics, t tests, and factor and regression analyses were used.Results: The sample consisted of 213 persons: 71 registered nurses, 42 enrolled nurses, and 100 nursing students. Swedish FATCOD mean scores did not differ from published means from the United States and Israel, but were significantly more positive than Japanese means. In line with Japanese studies, factor analyses yielded a 2-factor solution. Total FATCOD and subscales had low Cronbach [alpha]'s. Hospice and palliative team nurses were more positive than oncology and surgery nurses to care for dying patients.Conclusions: Although our results suggest that the Swedish FATCOD may comprise 2 distinct scales, the total scale may be the most adequate and applicable for use in Sweden. Professional experience was associated with nurses' attitudes toward caring for dying patients.Implication for Practice: Care culture might influence nurses' attitudes toward caring for dying patients; the benefits of education need to be explored.
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| 6. |
- Pattanaik, Bagmi, 1977, et al.
(författare)
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Polymorphisms in alpha 7 nicotinic acetylcholine receptor gene, CHRNA7, and its partially duplicated gene, CHRFAM7A, associate with increased inflammatory response in human peripheral mononuclear cells
- 2022
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Ingår i: Faseb Journal. - : Wiley. - 0892-6638 .- 1530-6860. ; 36:5
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Tidskriftsartikel (refereegranskat)abstract
- The vagus nerve can, via the alpha 7 nicotinic acetylcholine receptor (alpha 7nAChR), regulate inflammation. The gene coding for the alpha 7nAChR, CHRNA7, can be partially duplicated, that is, CHRFAM7A, which is reported to impair the anti-inflammatory effect mediated via the alpha 7nAChR. Several single nucleotide polymorphisms (SNPs) have been described in both CHRNA7 and CHRFAM7A, however, the functional role of these SNPs for immune responses remains to be investigated. In the current study, we set out to investigate whether genetic variants of CHRNA7 and CHRFAM7A can influence immune responses. By investigating data available from the Swedish SciLifeLab SCAPIS Wellness Profiling (S3WP) study, in combination with droplet digital PCR and freshly isolated PBMCs from the S3WP participants, challenged with lipopolysaccharide (LPS), we show that CHRNA7 and CHRFAM7A are expressed in human PBMCs, with approximately four times higher expression of CHRFAM7A compared with CHRNA7. One SNP in CHRFAM7A, rs34007223, is positively associated with hsCRP in healthy individuals. Furthermore, gene ontology (GO)-terms analysis of plasma proteins associated with gene expression of CHRNA7 and CHRFAM7A demonstrated an involvement for these genes in immune responses. This was further supported by in vitro data showing that several SNPs in both CHRNA7 and CHRFAM7A are significantly associated with cytokine response. In conclusion, genetic variants of CHRNA7 and CHRFAM7A alters cytokine responses. Furthermore, given that CHRFAM7A SNP rs34007223 is associated with inflammatory marker hsCRY in healthy individuals suggests that CHRFAM7A may have a more pronounced role in regulating inflammatory processes in humans than previously been recognized.
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| 7. |
- Silva, Vagner Ramon R, et al.
(författare)
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Somatic ablation of IKKβ in liver and leukocytes is not tolerated in obese mice but hepatic IKKβ deletion improves fatty liver and insulin sensitivity.
- 2022
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Ingår i: FASEB journal : official publication of the Federation of American Societies for Experimental Biology. - 1530-6860. ; 36:9
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Tidskriftsartikel (refereegranskat)abstract
- The kinase IKKβ controls pro-inflammatory gene expression, and its activity in the liver and leukocytes was shown to drive metabolic inflammation and insulin resistance in obesity. However, it was also proposed that liver IKKβ signaling protects obese mice from insulin resistance and endoplasmic reticulum (ER) stress by increasing XBP1s protein stability. Furthermore, mice lacking IKKβ in leukocytes display increased lethality to lipopolysaccharides. This study aims at improving our understanding of the role of IKKβ signaling in obesity. We induced IKKβ deletion in hematopoietic cells and liver of obese mice by Cre-LoxP recombination, using an INF-inducible system, or a liver-specific IKKβ deletion in obese mice by adenovirus delivery of the Cre recombinase. The histopathological, immune, and metabolic phenotype of the mice was characterized. IKKβ deletion in the liver and hematopoietic cells was not tolerated in mice with established obesity exposed to the TLR3 agonist poly(I:C) and exacerbated liver damage and ER-stress despite elevated XBP1s. By contrast, liver-specific ablation of IKKβ in obese mice reduced steatosis and improved insulin sensitivity in association with increased XBP1s protein abundance and reduced expression of de-novo lipogenesis genes. We conclude that IKKβ blockage in liver and leukocytes is not tolerated in obese mice exposed to TLR3 agonists. However, selective hepatic IKKβ ablation improves fatty liver and insulin sensitivity in association with increased XBP1s protein abundance and reduced expression of lipogenic genes.
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| 8. |
- Sjödahl Hammarlund, Catharina, et al.
(författare)
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External and internal factors influencing self-directed online learning of physiotherapy undergraduate students in Sweden : a qualitative study
- 2015
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Ingår i: Journal of Educational Evaluation for Health Professions. - : NATL HEALTH PERSONNEL LICENSING EXAMINATION BOARD. - 1975-5937. ; 12
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Tidskriftsartikel (refereegranskat)abstract
- Purpose: Online courses have become common in health sciences education. This learning environment can be designed using different approaches to support student learning. To further develop online environment, it is important to understand how students perceive working and learning online. The aim of this study is to identify aspects influencing students’ learning processes and their adaptation to self-directed learning online.Methods: Thirty-four physiotherapy students with a mean age of 25 years (range, 21 to 34 years) participated. Qualitative content analysis and triangulation was used when investigating the students’ self-reflections, written during a five week self-directed, problem-oriented online course.Results: Two categories emerged: ‘the influence of the structured framework’ and ‘communication and interaction with teachers and peers.’ The learning processes were influenced by external factors, e.g., a clear structure including a transparent alignment of assignments and assessment. Important challenges to overcome were primarily internal factors, e.g., low self-efficacy, difficulties to plan the work effectively and adapting to a new environment.Conclusion: The analyses reflected important perspectives targeting areas which enable further course development. The influences of external and internal factors on learning strategies and self-efficacy are important aspects to consider when designing online courses. Factors such as pedagogical design, clarity of purpose, goals, and guidelines were important as well as continuous opportunities for communication and collaboration. Further studies are needed to understand and scaffold the motivational factors among students with low self-efficacy
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| 9. |
- Sjödahl Hammarlund, Catharina, et al.
(författare)
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Measuring outcomes in Parkinson's disease : a multi-perspective concept mapping study
- 2012
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Ingår i: Quality of Life Research. - : Springer. - 0962-9343 .- 1573-2649. ; 21:3, s. 453-463
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Tidskriftsartikel (refereegranskat)abstract
- To identify and develop a conceptual map of prioritized areas and to determine their relative importance for outcome measurement in clinical Parkinson's disease (PD) trials, from the perspectives of health care professionals and people with PD.METHOD:We used concept mapping, a qualitative/quantitative method consisting of three steps: item generation through focus groups (n = 27; 12 people with PD, 12 health care professionals, 3 researchers), item sorting and rating (n = 38; 19 people with PD, 19 health care professionals), and data analysis (multidimensional scaling, cluster analysis).RESULTS:Ninety-nine items and eight clusters were generated. Clusters representing Participation; Mobility and motor functioning; Cognitive and executive functioning; and Emotions were the most homogenous. Statements within clusters representing Energy and abilities; Autonomic dysfunctions; Sensory, speech and swallowing problems; and Neuropsychiatric symptoms also related to statements outside their respective clusters. Clusters rated most important were Participation and Mobility and motor functioning, and the highest rated items were quality of life, walking ability, and sleeping problems.CONCLUSION:By the use of concept mapping, a multi-perspective conceptual map of prioritized aspects for the outcome measurement in PD was defined. These findings provide an initial conceptual basis toward improved outcome measurement priorities in clinical PD trials.
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| 10. |
- Sjödahl Hammarlund, Catharina, et al.
(författare)
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Motor and non-motor predictors of illness-related distress in Parkinson's disease
- 2012
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Ingår i: Parkinsonism & Related Disorders. - : Elsevier. - 1353-8020 .- 1873-5126. ; 18:3, s. 299-302
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Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVE: To identify motor and non-motor symptoms independently associated with distress in Parkinson's disease (PD).METHOD: Clinical and patient-reported data from 118 people with PD (mean age and PD-duration, 64 and 8 years) were analyzed regarding associations with patient-reported distress using multiple regressions (controlling for age).RESULTS: Non-motor symptoms independently associated with distress were pain, fatigue, sleep, depression and anxiety (R(2), 0.81). The only significant motor aspect was mobility (R(2), 0.31). When considering both motor and non-motor symptoms, fatigue, pain, depression and sleep showed independent associations with distress (R(2), 0.76).CONCLUSION: Distress in PD is primarily associated with non-motor features.
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