| 1. |
- Alden-Joyce, Tara, et al.
(författare)
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Tanzanian Nursing Students' Experiences of Student Exchange in Sweden : A Qualitative Case Study
- 2023
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Ingår i: Sage Open Nursing. - : Sage Publications. - 2377-9608. ; 9
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Tidskriftsartikel (refereegranskat)abstract
- IntroductionNeeds within healthcare are changing and nurses require new skills and knowledge in global nursing. Student exchange programs in global contexts provide an opportunity to develop the necessary skills. ObjectiveThe aim of this study was to describe Tanzanian nursing students' experiences of student exchange in Sweden. MethodsA qualitative design was used for this empirical study. Semistructured interviews were conducted with six Tanzanian nursing students who had participated in student exchange in Sweden. The participants were recruited by purposeful sampling. Inductive reasoning and qualitative content analysis were applied. ResultsFour main themes were formed; new roles, experience a new culture, establish new competencies, and global work ambitions. The findings revealed that the students experienced new approaches in Sweden, giving them new competencies and understanding. Furthermore, they increased their global perspectives on nursing and interest in working with global health issues, but they also experienced challenges in the new environment. ConclusionThe present study showed that Tanzanian nursing students benefitted from their student exchange, both personally, as well as for their future careers as nurses. More research is needed in examining nursing students from low-income countries participating in student exchange in high-income countries.
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| 2. |
- Brundin, Patrik, et al.
(författare)
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Improving the survival of grafted dopaminergic neurons: a review over current approaches
- 2000
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Ingår i: Cell Transplantation. - 1555-3892. ; 9:2, s. 179-195
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Tidskriftsartikel (refereegranskat)abstract
- Neural transplantation is developing into a therapeutic alternative in Parkinson's disease. A major limiting factor is that only 3-20% of grafted dopamine neurons survive the procedure. Recent advances regarding how and when the neurons die indicate that events preceding actual tissue implantation and during the first week thereafter are crucial, and that apoptosis plays a pivotal role. Triggers that may initiate neuronal death in grafts include donor tissue hypoxia and hypoglycemia, mechanical trauma, free radicals, growth factor deprivation, and excessive extracellular concentrations of excitatory amino acids in the host brain. Four distinct phases during grafting that can involve cell death have been identified: retrieval of the embryo; dissection and preparation of the donor tissue; implantation procedure followed by the immediate period after graft injection; and later stages of graft maturation. During these phases, cell death processes involving free radicals and caspase activation (leading to apoptosis) may be triggered, possibly involving an increase in intracellular calcium. We review different approaches that reduce cell death and increase survival of grafted neurons, typically by a factor of 2-4. For example, changes in transplantation procedure such as improved media and implantation technique can be beneficial. Calcium channel antagonists such as nimodipine and flunarizine improve nigral graft survival. Agents that counteract oxidative stress and its consequences, such as superoxide dismutase overexpression, and lazaroids can significantly increase the survival of transplanted dopamine neurons. Also, the inhibition of apoptosis by a caspase inhibitor has marked positive effects. Finally, basic fibroblast growth factor and members of the transforming growth factor-beta superfamily, such as glial cell line-derived neurotrophic factor, significantly improve the outcome of nigral transplants. These recent advances provide hope for improved survival of transplanted neurons in patients with Parkinson's disease, reducing the need for human embryonic donor tissue and increasing the likelihood of a successful outcome.
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| 3. |
- Emgård-Mattson, Mia, et al.
(författare)
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Patterns of cell death and dopaminergic neuron survival in intrastriatal nigral grafts
- 1999
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Ingår i: Experimental Neurology. - : Elsevier BV. - 0014-4886. ; 160:1, s. 88-279
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Tidskriftsartikel (refereegranskat)abstract
- Previous studies indicate that 80-95% of grafted dopamine neurons die following implantation of embryonic ventral mesencephalic tissue into the striatum. It is believed that the majority die within the first 1-3 weeks after surgery. The aim of this study was to study when and where the implanted neurons die, using the novel fluorescent stain Fluoro-Jade. Fluoro-Jade has recently been shown to stain cell bodies, dendrites, axons, and terminals of degenerating neurons. We transplanted dissociated ventral mesencephalic tissue from embryonic day 14 rat embryos into intact adult rat striatum. After perfusion and sectioning of the implanted rat brains, the number and distribution of Fluoro-Jade and tyrosine hydroxylase-positive neurons were evaluated at 6, 10, 14, and 42 days posttransplantation. Intensely Fluoro-Jade stained neurons were numerous in the grafts at 6 and 10 days after graft surgery; appeared in reduced numbers at 14 days; and had disappeared by the 42-day time point. The number of surviving tyrosine hydroxylase-positive, dopaminergic neurons in the grafts did not change between 6 and 42 days and the low survival rate confirmed that over 90% of these neurons had died during the first week. Assessment of the distribution of neurons positive for Fluoro-Jade or tyrosine hydroxylase revealed higher numbers of neurons stained for these markers located at the periphery than the center of the grafts, and this pattern did not change over time. This study indicates that transplanted neurons continue to die up to 14 days after grafting. Since the majority of transplanted tyrosine hydroxylase-positive neurons most probably die before 6 days after transplantation, neuroprotective strategies should primarily focus on the transplantation procedure and the first week after implantation.
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| 4. |
- Karlsson, Jenny C, et al.
(författare)
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Comparison between survival of lazaroid-treated embryonic nigral neurons in cell suspensions, cultures and transplants.
- 2002
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Ingår i: Brain Research. - 1872-6240. ; 955:1-2, s. 268-280
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Tidskriftsartikel (refereegranskat)abstract
- Death of transplanted dopaminergic neurons is induced both during preparation of donor tissue and after intrastriatal grafting. Oxidative stress is thought to be partly responsible for this cell death. In the present study we compared the effects of three lipid peroxidation inhibitors, the lazaroids Tirilazad mesylate, U-83836E and U-101033, on survival of embryonic mesencephalic neurons in different paradigms. The lazaroids were equally potent in preventing serum deprivation-induced death of cultured dopaminergic neurons. In a second set of experiments, mesencephalic suspensions were pretreated with lazaroids and cell survival was analyzed immediately after dissociation, after 2 or 24 h in culture or after intrastriatal transplantation. Lazaroid pretreatment failed to protect mesencephalic neurons in the in vitro paradigms and U-101033E did not protect grafted dopaminergic neurons in contrast to the neuroprotective effects previously reported for U-83836E and Tirilazad. Pretreatment with the iron chelator deferoxamine mesylate did not protect cultured or grafted dopaminergic neurons, nor did it improve neuronal survival in the serum deprivation model. U-83836E and U-101033E, but not Tirilazad, prevented cell death induced by the pro-oxidant tert-butyl hydroperoxide in suspensions. In a final experiment, we found that systemic treatment of the graft recipient rat with Tirilazad mesylate (before and during the first 3 days after grafting) improved survival of transplanted dopaminergic neurons to 180% of control values. Our results show that systemic treatment with a lipid peroxidation inhibitor for 3 days can promote graft survival, but also highlights the poor correlation between neuroprotective effect of pharmacological compounds in vitro and in grafts.
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| 5. |
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| 6. |
- Lönn, Maria
(författare)
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Bruten vithet : om den ryska femininitetens sinnliga och temporala villkor
- 2018
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Visual signs like skin color are just one of many factors in how white femininity is being articulated and interpreted. Other important components are the concept of a Eurocentric and linear temporality and the importance of being situated as modern. This thesis explores how certain forms of white femininity, depending on their locus, are privileged while others are seen as broken according to a hierarchy of white femininityKey to the dissertation are fashion-oriented white Russian women living in Stockholm, St. Petersburg and Moscow who are trying to embody ideas of modernities and normative temporality through the body and the senses. One way of doing so is by controlling their sensory expressions and thus that which white subjectivity has a long history of trying to transcend: the body. An example of this is the attempt to control smell, which works as a reminder of the primitive, animal, and outdated parts of the human being.Instead of investigating the making of the modern body-controlled white femininity through discourses, representations or articulated thoughts, the thesis focuses on how white femininity is inscribed in racialized perceptions through the level of bodily habits – or more specifically bodily habituations of norms and body schedules. This is done through a multisensory method that centers the ways smell, the visual, the haptic and the tactile are used as a way to experience and express modernities. Another important factor is how white femininity never articulates itself alone, but is instead always-already intimately connected to other bodies and objects. Thus, white femininity must always be seen as an intercorporal exchange.
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| 7. |
- Roghanian, Ali, et al.
(författare)
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Antagonistic Human FcγRIIB (CD32B) Antibodies Have Anti-Tumor Activity and Overcome Resistance to Antibody Therapy In Vivo.
- 2015
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Ingår i: Cancer Cell. - : Elsevier BV. - 1878-3686 .- 1535-6108. ; 27:4, s. 473-488
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Tidskriftsartikel (refereegranskat)abstract
- Therapeutic antibodies have transformed cancer therapy, unlocking mechanisms of action by engaging the immune system. Unfortunately, cures rarely occur and patients display intrinsic or acquired resistance. Here, we demonstrate the therapeutic potential of targeting human (h) FcγRIIB (CD32B), a receptor implicated in immune cell desensitization and tumor cell resistance. FcγRIIB-blocking antibodies prevented internalization of the CD20-specific antibody rituximab, thereby maximizing cell surface accessibility and immune effector cell mediated antitumor activity. In hFcγRIIB-transgenic (Tg) mice, FcγRIIB-blocking antibodies effectively deleted target cells in combination with rituximab, and other therapeutic antibodies, from resistance-prone stromal compartments. Similar efficacy was seen in primary human tumor xenografts, including with cells from patients with relapsed/refractory disease. These data support the further development of hFcγRIIB antibodies for clinical assessment.
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| 8. |
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