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- Birgisson, Helgi, et al.
(author)
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Microsatellite instability and mutations in BRAF and KRAS are significant predictors of disseminated disease in colon cancer
- 2015
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In: BMC Cancer. - : Springer Science and Business Media LLC. - 1471-2407. ; 15
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Journal article (peer-reviewed)abstract
- Background: Molecular alterations are well studied in colon cancer, however there is still need for an improved understanding of their prognostic impact. This study aims to characterize colon cancer with regard to KRAS, BRAF, and PIK3CA mutations, microsatellite instability (MSI), and average DNA copy number, in connection with tumour dissemination and recurrence in patients with colon cancer. Methods: Disease stage II-IV colon cancer patients (n = 121) were selected. KRAS, BRAF, and PIK3CA mutation status was assessed by pyrosequencing and MSI was determined by analysis of mononucleotide repeat markers. Genome-wide average DNA copy number and allelic imbalance was evaluated by SNP array analysis. Results: Patients with mutated KRAS were more likely to experience disease dissemination (OR 2.75; 95% CI 1.28-6.04), whereas the opposite was observed for patients with BRAF mutation (OR 0.34; 95% 0.14-0.81) or MSI (OR 0.24; 95% 0.09-0.64). Also in the subset of patients with stage II-III disease, both MSI (OR 0.29; 95% 0.10-0.86) and BRAF mutation (OR 0.32; 95% 0.16-0.91) were related to lower risk of distant recurrence. However, average DNA copy number and PIK3CA mutations were not associated with disease dissemination. Conclusions: The present study revealed that tumour dissemination is less likely to occur in colon cancer patients with MSI and BRAF mutation, whereas the presence of a KRAS mutation increases the likelihood of disseminated disease.
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- Björner Brauer, Hanna, et al.
(author)
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Pain Relieving Light - (How) Is it Possible?
- 2024. - 1
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In: IOP Science home Accessibility Help Journals Books Publishing Support Login IOP Conference Series: Earth and Environmental Science. - 1755-1307. ; 1320
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Conference paper (peer-reviewed)abstract
- About 15% of the population suffer from migraines and it is estimated that about 40% of all people with migraines would benefit from preventive treatment, but only 3-13% use it. Migraine is a huge burden for society and individuals. Migraines can be intensified by light, and some patients need to stay in a dark room until the attack is over. People with this type of photosensitivity show a clear preference for light color, specifically green, which has been shown to be more comfortable and even pain relieving in some cases. We will present a feasibility study with the aim of preparing a series of experiments to investigate if regular short-term green-light-exposure can prevent migraines. We will present findings from the literature, developed light equipment, and plans for future testing of migraine friendly light solutions.
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- Ekström, Ulf, et al.
(author)
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Internalization of cystatin C in human cell lines.
- 2008
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In: The FEBS Journal. - : Wiley. - 1742-464X. ; Aug 9, s. 4571-4582
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Journal article (peer-reviewed)abstract
- Altered protease activity is considered important for tumour invasion and metastasis, processes in which the cysteine proteases cathepsin B and L are involved. Their natural inhibitor cystatin C is a secreted protein, suggesting that it functions to control extracellular protease activity. Because cystatins added to cell cultures can inhibit polio, herpes simplex and coronavirus replication, which are intracellular processes, the internalization and intracellular regulation of cysteine proteases by cystatin C should be considered. The extension, mechanism and biological importance of this hypothetical process are unknown. We investigated whether internalization of cystatin C occurs in a set of human cell lines. Demonstrated by flow cytometry and confocal microscopy, A-431, MCF-7, MDA-MB-453, MDA-MB-468 and Capan-1 cells internalized fluorophore-conjugated cystatin C when exposed to physiological concentrations (1 mum). During cystatin C incubation, intracellular cystatin C increased after 5 min and accumulated for at least 6 h, reaching four to six times the baseline level. Western blotting showed that the internalized inhibitor was not degraded. It was functionally intact and extracts of cells exposed to cystatin C showed a higher capacity to inhibit papain and cathepsin B than control cells (decrease in enzyme activity of 34% and 37%, respectively). The uptake of labelled cystatin C was inhibited by unlabelled inhibitor, suggesting a specific pathway for the internalization. We conclude that the cysteine protease inhibitor cystatin C is internalized in significant quantities in various cancer cell lines. This is a potentially important physiological phenomenon not previously described for this group of inhibitors.
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- Eneroth, Hanna, et al.
(author)
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Risks and Benefits of Increased Nut Consumption : Cardiovascular Health Benefits Outweigh the Burden of Carcinogenic Effects Attributed to Aflatoxin B1 Exposure
- 2017
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In: Nutrients. - : MDPI AG. - 2072-6643. ; 9:12
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Journal article (peer-reviewed)abstract
- Nuts are rich in nutrients and mounting evidence shows that consumption reduces cardiovascular disease (CVD) incidence. Nuts may also be a major source of aflatoxin B₁, a potent liver carcinogen and the risk/benefit balance is unknown. Based on national statistics and data from the PREDIMED intervention trial, we estimated the potential CVD-reduction if Swedes aged 55-79 consumed 30 g nuts/day, instead of the current national average of five grams per day. We also assessed the reduction in disability-adjusted life years (DALYs) due to myocardial infarction (MI) and stroke. We estimated the aflatoxin B₁ exposure from nuts and calculated the margin of exposure. The approximation that one nanogram aflatoxin B₁/kg body weight/day results in one additional liver cancer case/10 million person-years was used to estimate the number of liver cancer cases. The increased nut consumption scenario prevented more than 7000 CVDs in 2013 (306/100,000 person-years) and contributed to about 55,000 saved DALYs for stroke and 22,000 for MI. The concomitant increase in aflatoxin B₁ exposure caused an estimated zero to three additional cases of liver cancer, corresponding to 159 DALYs spent, emphasizing the associated risks. Increased nut consumption, as part of a varied healthy diet, is warranted even when aflatoxin B₁ exposure is taken into account. However, efforts to reduce aflatoxin exposure from food are essential.
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- Frendéus, Katarina H, et al.
(author)
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Macrophage Responses to Interferon-gamma are Dependent on Cystatin C Levels.
- 2009
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In: International Journal of Biochemistry and Cell Biology. - : Elsevier BV. - 1878-5875 .- 1357-2725. ; 41, s. 2262-2269
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Journal article (peer-reviewed)abstract
- The aim of the present investigation was to elucidate possible effects of cystatin C on inflammatory responses mediated by macrophages. Previously it has been shown that in vitro treatment of murine peritoneal macrophages with interferon-gamma (IFN-gamma) causes a down-regulation of cystatin C secretion. To investigate whether such changes in cystatin C expression in turn can affect inflammatory responses mediated by macrophages, we have compared effects of IFN-gamma on macrophages isolated from wild-type (cysC(+/+)) and cystatin C knockout (cysC(-/-)) mice. It was shown that IFN-gamma-primed cysC(-/-) macrophages exhibit significantly higher interleukin-10 (IL-10) but lower tumor necrosis factor-alpha (TNF-alpha) expression, and reduced nuclear factor (NF)-kappaB p65 activation, compared to similarily primed cysC(+/+) cells. Exogenously added cystatin C enhanced IFN-gamma-induced activation of NF-kappaB p65 and increased mRNA levels for inducible NO synthase (iNOS) in cysC(-/-) macrophages as well as levels of nitric oxide and TNF-alpha in the cell culture medium, in agreement with an enhanced pro-inflammatory response. Accordingly, IFN-gamma-induced IL-10 mRNA expression in cysC(-/-) macrophages was down-regulated by exogenously added cystatin C square. Taken together, our data provide evidence that changes in cystatin C levels alter macrophage responses to IFN-gamma. The latter downregulates the production of cystatin C, which leads to a suppressed inflammatory condition with enhanced IL-10 levels and downregulated TNF-alpha and NF-kappaB. It is concluded that cystatin C through this effect can act as an immunomodulatory molecule.
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- Gabrielsson, Hanna, 1977-, et al.
(author)
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Övergången från att vara patient med cancer till person med erfarenhet av cancer : Civilsamhällets roll i rehabilitering
- 2023
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In: Socialmedicinsk Tidskrift. - : Socialmedicinsk tidskrift. - 0037-833X. ; 100:1, s. 165-178
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Research review (peer-reviewed)abstract
- En avslutad cancerbehandling innebär inte automatiskt ett avslut på de utmaningar som följer med cancer. Behovet av cancerrehabilitering ökar i takt med fler som överlever cancer. Det råder viss otydlighet kring vilka rehabiliteringsinsatser som efterfrågas och vilka aktörer som erbjuder dessa. Denna studie har genom en litteraturöversikt satt ljuset på deltagares erfarenheter av cancerrehabilitering samt civilsamhällets roll i rehabilitering efter genomgången cancer i de nordiska länderna. Resultatet av litteraturöversikten visar att få studier finns publicerade om civilsamhällets roll i cancerrehabilitering. Personer som har genomgått en cancersjukdom har ofta behov av stöd under sin rehabilitering, där stöd från personer i liknande situation uppskattas av många. Resultatet visar även att organisationer i civilsamhället spelar en betydande roll. Studien har genomförts vid Centrum för civilsamhällesforskning, Marie Cederschiöld Högskola.
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| 10. |
- Grundström, Hanna, et al.
(author)
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'You expose yourself in so many ways': young women's experiences of pelvic examination
- 2011
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In: Journal of Psychosomatic Obstetrics and Gynaecology. - : Informa Healthcare. - 0167-482X .- 1743-8942. ; 32:2, s. 59-64
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Journal article (peer-reviewed)abstract
- The aim of this study was to identify and describe young women's experiences of pelvic examination (PE). Qualitative interviews were conducted with nine women aged 18--23 years, who had undergone at least one PE. Data were analysed using an interpretative phenomenological approach. Three general themes were identified: (1) relinquishing and regaining control, (2) facilitation of the situation by the examiner and (3) PE is an unpleasant necessity. These general themes had a common structure that represented the essence: an intimate situation. The women experienced PE as an intimate situation, which they associated with their sexuality. They felt exposed both bodily and mentally and were placed in a vulnerable situation. PE was considered as unpleasant but necessary to confirm their health. During the PE, the women felt that they lost control of the situation by exposing their intimate parts. To regain control, the women felt a need for continuous information from the examiner. The vulnerable situation could be made less vulnerable if the examiner built a trusting relationship and made the women feel secure and seen as individuals. A deeper understanding of the situation from the women's perspective could facilitate the examiner's performance of PE, leading to more positive experiences among young women.
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