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60 result(s) for "Axelsson, Lena"
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Half a century of multiple anthropogenic stressors has altered northern forest understory plant communities
Boreal forests form the largest and least disturbed forest biome in the northern hemisphere. However, anthropogenic pressure from intensified forest management, eutrophication, and climate change may alter the ecosystem functions of understory vegetation and services boreal forests provide. Swedish forests span long gradients of climate, nitrogen deposition, and management intensity. This makes them ideal to study how the species composition and functions of other, more pristine, boreal forests might change under increased anthropogenic pressure. Moreover, the National Forest Inventory (NFI) has collected systematic data on Swedish forest vegetation since the mid-20th century. We use this data to quantify changes in vegetation types between two periods, 1953–1962 and 2003–2012. The results show changes in forest understory vegetation since the 1950s at scales not previously documented in the boreal biome. The spatial extent of most vegetation types changed significantly. Shade-adapted and nutrient-demanding species (those with high specific leaf area) have become more common at the expense of light-demanding and nutrient-conservative (low specific leaf area) species. The cover of ericaceous dwarf shrubs decreased dramatically. These effects were strongest where anthropogenic impacts were greatest, suggesting links to drivers such as nitrogen deposition and land-use change. These changes may impact ecosystem functions and services via effects on higher trophic levels and faster plant litter decomposition in the expanding vegetation types. This, in turn, may influence nutrient dynamics, and consequently ecosystem productivity and carbon sequestration.
Men’s experiences of decision-making in life-prolonging treatments of metastatic castration-resistant prostate cancer – wishing for a process adapted to personal preferences: a prospective interview study
Background In the fast-expanding field of life-prolonging-treatment of metastatic, castration-resistant prostate cancer, treatment decision-making is very complex - both for patients and healthcare professionals since there is no “one size that fits all” in choosing treatment in this phase. Little research has been conducted about men’s experiences of treatment decision-making in this advanced, incurable, phase. Hence, this study aimed to describe men’s experiences of decision-making in life-prolonging treatments of metastatic castration-resistant prostate cancer. Methods Seventeen men were recruited from four oncology clinics in Sweden and interviewed at baseline. Qualitative interviews ( n  = 31) were conducted over two years, the timepoints for subsequent interviews (10 men were interviewed twice or more) adhered to when each man switched or terminated life-prolonging treatment. Data was analysed with qualitative content analysis. Results Initially, the men were adamant about proceeding with treatment. As their illness continued to progress, they gradually turned their focus more towards their well-being. They wished for continuity regarding treating physicians and constantly being assigned new physicians compromised the quality of care and complicated decision-making. In their decision-making, the men adapted their own approach to the approach taken by their physician, even if it was not an approach they had originally preferred. They wished for their role preferences to be respected. Most men had made treatment decisions collaboratively with their physician, but some described having taken on a more, or less, driving role in decision-making than they really wished for. Navigating healthcare was perceived as difficult and for some it thus felt necessary to pursue and coordinate their own care by e.g. using personal connections or contacting clinics ahead of referral. A part of treatment decision-making was forming a basis for a decision, in which the need for personalized information (quality, quantity and timing) came forth as important. Conclusions When diagnosed with metastatic castration-resistant prostate cancer, men’s preferences for their decision-making role, and perspectives on the treatment outcome need to be continuously addressed throughout their disease course. Improved continuity of care and a more personalised care approach should meet these patients’ wishes and needs in this phase. Trial registration Clinical trial number: Not applicable.
End-of-life and palliative care of patients on maintenance hemodialysis treatment: a focus group study
Background Despite complex illness trajectories and a high symptom burden, palliative care has been sub-optimal for patients with end-stage kidney disease and hemodialysis treatment who have a high rate of hospitalization and intensive care towards end of life. There is a growing awareness that further development of palliative care is required to meet the needs of these patients and their family members. In this process, it is important to explore healthcare professionals’ views on provision of care. The aim of this study was therefore to describe nurses’ and physicians’ perspectives on end-of-life and palliative care of patients treated with maintenance hemodialysis. Methods Four focus group interviews were conducted with renal nurses (17) and physicians (5) in Sweden. Qualitative content analysis was used to analyze data. Results Participants were committed to giving the best possible care to their patients, but there were challenges and barriers to providing quality palliative care in nephrology settings. Professionals described palliative care as end-of-life care associated with hemodialysis withdrawal or palliative dialysis, but also identified care needs and possibilities that are in line with an earlier integrated palliative approach. This was perceived as complex from an organizational point of view. Participants identified challenges related to coordination of care and different perspectives on care responsibilities that impacted symptom management and patients’ quality of life. Communication issues relating to the provision of palliative care were revealed where the hemodialysis setting was regarded as an impediment, and personal and professional experiences, beliefs and knowledge were considered of major importance. Conclusions Nurses and physicians identified a need for the improvement of both late and earlier palliative care approaches. The results highlighted a requirement for and possibilities of training, counselling and support of health care professionals in the dialysis context. Further, multi-professional palliative care collaborations should be developed to improve the coordination and organization of end-of-life and palliative care of patients and their family members. A climate allowing conversations about advance care planning throughout the illness trajectory may facilitate the gradual integration of palliative care alongside life-prolonging treatment for improved support of patients and families.
START – physical exercise and person-centred cognitive skills training as treatment for adult ADHD: protocol for a randomized controlled trial
Background Core symptoms in attention deficit hyperactivity disorder (ADHD) are inattention, impulsivity and hyperactivity. Many individuals with this disorder also have a sedentary lifestyle, co-morbid mental illness such as depressive and anxiety disorders, and reduced quality of life. People with ADHD often have impaired executive function, which among other things may include difficulty in time management and structuring of everyday life. Pharmacological treatment is often the first-line option, but non-pharmacological treatment is also available and is used in clinical settings. In children and adolescents with ADHD, physical exercise is used as a non-pharmacological treatment. However, the evidence for the effectiveness of exercise in adults is sparse. Objective To implement the START intervention (START =  Stöd i Aktivitet, Rörelse och Träning [Support in activity, movement and exercise]) consisting of a 12-week, structured mixed exercise programme with or without a cognitive intervention, in adults with ADHD, and study whether it has an effect on core symptoms of ADHD as well as physical, cognitive, mental and everyday functioning compared with usual treatment. A secondary aim is to investigate the participants’ experiences of the intervention and its possible benefits, and to evaluate the cost-effectiveness of START compared with usual treatment. Methods This is a randomized controlled trial planned to be conducted in 120 adults with ADHD, aged 18–65. The intervention will be given as an add-on to standard care. Participants will be randomized to three groups. Group 1 will be given a physiotherapist-led mixed exercise programme for 12 weeks. Group 2 will receive the same intervention as group 1 with the addition of occupational therapist-led cognitive skills training. Group 3 will be the control group who will receive standard care only. The primary outcome will be reduction of ADHD symptoms measured using the World Health Organization (WHO) Adult ADHD Self-Report Scale (ASRS-v1.1), Clinical Global Impression-Severity scale (CGI-S) and CGI-Improvement scale (CGI-I). The effect will be measured within 1 week after the end of the intervention and 6 and 12 months later. Discussion Data collection began in March 2021. The final 12-month follow-up is anticipated to be completed by autumn 2024. Trial registration ClinicalTrials.gov (Identifier: NCT05049239). Registered on 20 September 2021 (last verified: May 2021).
t-butyloxycarbonyl-modified Wnt5a-derived hexapeptide functions as a potent antagonist of Wnt5a-dependent melanoma cell invasion
The influential role of Wnt5a in tumor progression underscores the requirement for developing molecules that can target Wnt5a-mediated cellular responses. In the aggressive skin cancer, melanoma, elevated Wnt5a expression promotes cell motility and drives metastasis. Two approaches can be used to counteract these effects: inhibition of Wnt5a expression or direct blockade of Wnt5a signaling. We have investigated both options in the melanoma cell lines, A2058 and HTB63. Both express Frizzled-5, which has been implicated as the receptor for Wnt5a in melanoma cells. However, only the HTB63 cell line expresses and secretes Wnt5a. In these cells, the cytokine, TGFβ1, controlled the expression of Wnt5a, but due to the unpredictable effects of TGFβ1 signaling on melanoma cell motility, targeting Wnt5a signaling via TGFβ1 was an unsuitable strategy to pursue. We therefore attempted to target Wnt5a signaling directly. Exogenous Wnt5a stimulation of A2058 cells increased adhesion, migration and invasion, all crucial components of tumor metastasis, and the Wnt5a-derived N-butyloxycarbonyl hexapeptide (Met-Asp-Gly-Cys-Glu-Leu; 0.766 kDa) termed Box5, abolished these responses. Box5 also inhibited the basal migration and invasion of Wnt5a-expressing HTB63 melanoma cells. Box5 antagonized the effects of Wnt5a on melanoma cell migration and invasion by directly inhibiting Wnt5a-induced protein kinase C and Ca²⁺ signaling, the latter of which we directly demonstrate to be essential for cell invasion. The Box5 peptide directly inhibits Wnt5a signaling, representing an approach to anti-metastatic therapy for otherwise rapidly progressive melanoma, and for other Wnt5a-stimulated invasive cancers.
Higher levels of unmet support needs in spouses are associated with poorer quality of life – a descriptive cross-sectional study in the context of palliative home care
Background Family caregivers often report having unmet support needs when caring for someone with life-threatening illness. They are at risk for psychological distress, adverse physical symptoms and negatively affected quality of life. This study aims to explore associations between family caregivers’ support needs and quality of life when caring for a spouse receiving specialized palliative home care. Methods A descriptive cross-sectional design was used: 114 family caregivers completed the Carer Support Needs Assessment Tool (CSNAT) and the Quality of Life in Life-Threatening Illness – Family caregiver version (QOLLTI-F) and 43 of them also answered one open-ended question on thoughts about their situation. Descriptive statistics, multiple linear regression analyses, and qualitative content analysis, were used for analyses. Results Higher levels of unmet support needs were significantly associated with poorer quality of life. All CSNAT support domains were significantly associated with one or more quality of life domains in QOLLTI-F, with the exception of the QoL domain related to distress about the patient condition. However, family caregivers described in the open-ended question that their life was disrupted by the patient’s life-threatening illness and its consequences. Family caregivers reported most the need of more support concerning knowing what to expect in the future, which they also described as worries and concerns about what the illness would mean for them and the patient further on. Lowest QoL was reported in relation to the patient’s condition, and the family caregiver’s own physical and emotional health. Conclusion With a deeper understanding of the complexities of supporting family caregivers in palliative care, healthcare professionals might help to increase family caregivers’ QoL by revealing their problems and concerns. Thus, tailored support is needed.
The Support Needs Approach for Patients (SNAP): content validity and response processes from the perspective of patients and nurses in Swedish specialised palliative home care
Background The Support Needs Approach for Patients (SNAP) enables patients to reflect on, identify and prioritise their own support needs from a holistic perspective and enable tailored support. Therefore, the aim of this study was to examine the content validity and response processes for the Swedish version of the SNAP Tool among patients with life-threatening illness and palliative care needs, and registered nurses (RN) in specialized palliative home care services. Methods This was a two-stage validation study: (I) translation of the original English version of the SNAP Tool into Swedish, and (II) examination of content validity for patients and RNs in specialized palliative home care, and response processes among the patients. Cognitive interviews were conducted with patients ( n =11) and focus groups with RNs ( n =10). Data were, in stage II, analysed for relevance, clarity, and sensitivity. Results The translation process identified a few differences in wordings that were thoroughly debated to retain the meaning of the questions. Both patients and RNs considered the Swedish version of the SNAP Tool relevant to the palliative care context and its questions clear and easy to understand. Patients believed that their responses on the tool could be helpful in providing a clear structure for conversations and present a picture of their individual support needs. There were just a few considerations about sensitivity of questions from the patients’ perspectives and the RNs felt that some of the questions may need to be handled with care. Conclusions This study demonstrates that the Swedish version of the SNAP Tool has good coverage of Swedish patients’ support needs, and that the questions are perceived as intended. This indicates that the SNAP Tool effectively captures a wide range of support needs and aligns with its intended purpose. The tool is appropriate for specialized palliative home care and allows the SNAP intervention to be made available to this group of patients.
Measuring quality of life in life-threatening illness – content validity and response processes of MQOL-E and QOLLTI-F in Swedish patients and family carers
Background The McGill Quality of Life Questionnaire - Expanded (MQOL-E) and the Quality of Life in Life-Threatening Illness-Family Carer/Caregiver version (QOLLTI-F) are developed for use with patients facing the end of life and their family carers, respectively. They are also developed for possible use as companion instruments. Contemporary measurement validity theory places emphasis on response processes, i.e. what people feel and think when responding to items. Response processes may be affected when measurement instruments are translated and adapted for use in different cultures. The aim of this study was to translate and examine content validity and response processes during completion of MQOL-E and QOLLTI-F version 2 (v2) among Swedish patients with life-threatening illness and their family carers. Methods The study was conducted in two stages (I) translation and adaptation (II) examination of content validity and response processes using cognitive interviews with 15 patients and 9 family carers. Participants were recruited from the hemodialysis unit, heart clinic, lung clinic and specialized palliative care of a Swedish county hospital. Patients had life-threatening illness such as advanced heart failure, advanced chronic obstructive pulmonary disease, end-stage kidney disease or advanced cancer. Patients were outpatients, inpatients or receiving home care. Results Patients and family carers respectively believed that the items of the MQOL-E and QOLLTI-F v2 reflect relevant and important areas of their quality of life. Although some items needed more time for reflection, both instruments were considered easy to understand. Some changes were made to resolve issues of translation. Participants expressed that reflecting on their situation while answering questions was valuable and meaningful to them, and that responding was an opportunity to express feelings. Conclusions The results of response processes pertaining to the Swedish translations of both MQOL-E and QOLLTI-F v2 contribute evidence regarding content validity, linguistic equivalence and cultural appropriateness of the translated instruments. In addition, results show that the instruments may support conversations on matters of importance for quality of life between patients and/or family carers and health care professionals. Further research is needed to study the psychometric properties of Swedish translations.
WNT-5A triggers Cdc42 activation leading to an ERK1/2 dependent decrease in MMP9 activity and invasive migration of breast cancer cells
An important role for WNT-5A is implicated in a variety of tumors, including breast carcinoma. We previously showed that WNT-5A signaling inhibits migration and metastasis of breast cancer cells, and that patients with primary breast cancer in which WNT-5A was expressed have a better prognosis. Despite the fact that RhoGTPase Cdc42 is commonly associated with increased cell migration, we here show that recombinant WNT-5A activates the Cdc42 in breast cancer cells (lines MDA-MB468 and MDA-MB231) in a time-dependent manner. Activation of Cdc42 was also observed in MDA-MB468 cells that were stably transfected with a WNT-5A plasmid (MDA-MB468-5A). In all situations, increased Cdc42 activity was accompanied by decreased migration and invasion of the breast cancer cells. To explore these findings further we also investigated the effect of WNT-5A signaling on ERK1/2 activity. Apart from an initial Ca2+-dependent rWNT-5A-induced activation of ERK1/2, Cdc42 activity was inversely correlated with ERK1/2 activity in both rWNT-5A-stimulated parental MDA-MB468 and MDA-MB468-5A cells. We also demonstrated increased ERK1/2 activity in MDA-MB468-5A cells following siRNA knockdown of Cdc42. Consistent with these results, breast cancer cells transfected with constitutively active Cdc42 exhibited reduced ERK1/2 activity, migration and invasion, whereas cells transfected with dominant negative Cdc42 had increased ERK1/2 activity in response to rWNT-5A. To gain information on how ERK1/2 can mediate its effect on breast cancer cell migration and invasion, we next investigated and demonstrated that WNT-5A signaling and constitutively active Cdc42 both decreased matrix metalloproteinase 9 (MMP9) activity. These data indicate an essential role of Cdc42 and ERK1/2 signaling and MMP9 activity in WNT-5A-impaired breast cancer cells. •A controversy exists regarding the role of WNT-5A in breast cancer cell migration.•Surprisingly, WNT-5A-induced Cdc42 activation leads to decreased breast cancer cell migration and invasion.•WNT-5A triggers cross-talk between Cdc42 and ERK1/2 thereby regulating MMP9 activity.•WNT-5A mediates a tumor suppressor effect on breast cancer cells.