| 11. |
- Dalal, Hina, et al.
(författare)
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Clinical associations of ESR2 (estrogen receptor beta) expression across thousands of primary breast tumors
- 2022
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Ingår i: Scientific Reports. - : Springer Science and Business Media LLC. - 2045-2322. ; 12, s. 1-12
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Tidskriftsartikel (refereegranskat)abstract
- Estrogen receptor alpha (ERα, encoded by ESR1) is a well-characterized transcription factor expressed in more than 75% of breast tumors and is the key biomarker to direct endocrine therapies. On the other hand, much less is known about estrogen receptor beta (ERβ, encoded by ESR2) and its importance in cancer. Previous studies had some disagreement, however most reports suggested a more favorable prognosis for patients with high ESR2 expression. To add further clarity to ESR2 in breast cancer, we interrogated a large population-based cohort of primary breast tumors (n = 3207) from the SCAN-B study. RNA-seq shows ESR2 is expressed at low levels overall with a slight inverse correlation to ESR1 expression (Spearman R = -0.18, p = 2.2e-16), and highest ESR2 expression in the basal- and normal-like PAM50 subtypes. ESR2-high tumors had favorable overall survival (p = 0.006), particularly in subgroups receiving endocrine therapy (p = 0.03) and in triple-negative breast cancer (p = 0.01). These results were generally robust in multivariable analyses accounting for patient age, tumor size, node status, and grade. Gene modules consistent with immune response were associated to ESR2-high tumors. Taken together, our results indicate that ESR2 is generally expressed at low levels in breast cancer but associated with improved overall survival and may be related to immune response modulation.
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| 12. |
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| 13. |
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| 14. |
- Eriksson, Malin, 1969-, et al.
(författare)
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Social capital, gender and educational level : impact on self-rated health
- 2010
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Ingår i: The Open Public Health Journal. - : Bentham Science Publishers. - 1874-9445. ; 3, s. 1-12
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Tidskriftsartikel (refereegranskat)abstract
- Objectives: Social capital has been recognized as one important social determinant for health, but we still have limited knowledge about how it can be used to explain inequality in health. This study investigated the links between individual social capital and self-rated health by gender and educational level, and analyzed if access to social capital might explain the observed disparities in self-rated health between men and women and different educational groups. Study design: A cross-sectional survey in Northern Sweden. Methods: A social capital questionnaire was constructed and mailed to 15 000 randomly selected individuals. Different forms of structural and cognitive social capital were measured. Self-rated health was used as the outcome measure. Crude and adjusted OR and 95% CI were calculated for good selfrated health and access to each form of social capital. Multivariate regression was used to analyze how sociodemographic factors and access to social capital might influence differences in self-rated health by gender and educational level. Results: Access to almost each form of social capital significantly increased the odds for good self-rated health for all groups. A higher education significantly increased the odds for access to each form of social capital, and being a man significantly increased the odds for having access to some forms of social capital. The health advantage for higher educated and men partly decreased when controlling for access to social capital. Conclusions: Access to social capital can partly explain the observed health inequality between men and women and different educational groups. Strengthening social capital might be one way of tackling health inequality. It is important to consider the structural conditions that create unequal opportunities for different groups to access social capital.
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| 15. |
- Eriksson, Malin, 1969-
(författare)
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Social capital, health and community action : implications for health promotion
- 2010
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Background; The overwhelming increase in studies about social capital and health occurring since 1995 indicates a renewed interest in the social determinants of health and a call for a more explicit use of theory in public health and epidemiology. The links between social capital and health are still not clear and the meanings of different forms of individual and collective social capital and their implications for health promotion needs further exploration. The overall aims of this thesis are to explore the relationship between social capital and health and to contribute to the theoretical framework of the role of social capital for health and health promotion.Methods; Data from a social capital survey were used to investigate the associations between individual social capital and self-rated health for men and women and different educational groups. Survey data were also analyzed to determine the association between collective social capital and self-rated health for men and women. A qualitative case study in a small community with observed high levels of civic engagement formed the basis for exploring the role of social capital for community action. Data from the same study were utilized for a grounded theory situational analysis of the social mechanisms leading to social capital mobilization.Main findings; Access to individual social capital increases the odds for good self-rated health equally for men and women and different educational groups. However, the likelihood of having access to social capital differs between groups. The results indicate a positive association between collective social capital and self-rated health for women but not for men. Results from the qualitative case study illustrate how social capital in local communities can facilitate collective actions for public good but may also increase social inequality. Mobilizing social capital in local communities requires identification of community issues that call for action, a fighting spirit from trusted local leaders, “know-how” from creative entrepreneurs, and broad legitimacy and support in the community.Conclusions; This thesis supports the idea that individual social capital is health-enhancing and that strengthening individual social capital can be considered one important health promotion strategy. Collective social capital may have a positive effect on self-rated health for women but not for men and therefore mobilizing collective social capital might be more health-enhancing for women. Collective social capital may have indirect positive effects on health for all by facilitating the ability of communities to solve collective health problems. However, mobilizing social capital in local communities requires an awareness of the risk for increased social inequality.
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| 16. |
- Eriksson, Malin, 1969-, et al.
(författare)
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Understanding the role of social capital for health promotion beyond Putnam : a qualitative case study from northern Sweden
- 2009
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Ingår i: Social theory and health. - : Springer Science and Business Media LLC. - 1477-8211 .- 1477-822X. ; 7:4, s. 318-338
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Tidskriftsartikel (refereegranskat)abstract
- Social capital is believed to improve the capacity of communities to work together for solving collective health problems. The present study was conducted in a community in northern Sweden where citizens through collective actions managed to build an association-driven health center. The aims were to describe the community's existing social capital in order to explore how Putnam's theories could contribute to an understanding of the observed high civic engagement and to discuss how other theoretical perspectives might add to an understanding of the role of social capital for health promotion. A qualitative case study was performed and the analysis followed a grounded theory approach. In accordance with Putnam, inherited social capital and high participation in existing associations were found to be important for uniting people. Beyond these, other aspects such as effective information channels, strong leaders and high social control were also significant and better understood by adding Coleman's and Bourdieu's views of social capital. If social capital is to be used for the purposes of health promotion the risk of increased social inequality as an unintended consequence needs to be considered. An awareness of how specific contextual conditions affect the building and mobilizing of social capital is also crucial.
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| 17. |
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| 18. |
- Fäldt, Jenny, 1971, et al.
(författare)
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Activation of human neutrophils by mycobacterial phenolic glycolipids.
- 1999
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Ingår i: Clinical and experimental immunology. - 0009-9104. ; 118:2, s. 253-60
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Tidskriftsartikel (refereegranskat)abstract
- The interaction between mycobacterial phenolic glycolipids (PGLs) and phagocytes was studied. Human neutrophils were allowed to interact with each of four purified mycobacterial PGLs and the neutrophil production of reactive oxygen metabolites was followed kinetically by luminol-/isoluminol-amplified chemiluminescence. The PGLs from Mycobacterium tuberculosis and Mycobacterium kansasii, respectively, were shown to stimulate the production of oxygen metabolites, while PGLs from Mycobacterium marinum and Mycobacterium bovis BCG, respectively, were unable to induce an oxidative response. Periodate treatment of the M. tuberculosis PGL decreased the production of oxygen radicals, showing the importance of the PGL carbohydrate moiety for the interaction. The activation, however, could not be inhibited by rhamnose or fucose, indicating a complex interaction which probably involves more than one saccharide unit. This is in line with the fact that the activating PGLs from M. tuberculosis and M. kansasii contain tri- and tetrasaccharides, respectively, while the nonactivating PGLs from M. marinum and M. bovis BCG each contain a monosaccharide. The complement receptor 3 (CR3) has earlier been shown to be of importance for the phagocyte binding of mycobacteria, but did not appear to be involved in the activation of neutrophils by PGLs. The subcellular localization of the reactive oxygen metabolites formed was related to the way in which the glycolipids were presented to the cells.
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| 19. |
- Fäldt, Jenny, 1971, et al.
(författare)
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Priming of human neutrophils by mycobacterial lipoarabinomannans: role of granule mobilisation.
- 2001
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Ingår i: Microbes and infection. - 1286-4579. ; 3:13, s. 1101-9
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Tidskriftsartikel (refereegranskat)abstract
- Lipoarabinomannans (LAMs) from mycobacteria were investigated concerning their effect on human neutrophils. Two types of LAM, the mannose-capped ManLAM from the virulent Mycobacterium tuberculosis H37Rv and the mannose-lacking AraLAM from a rapidly growing mycobacterial strain were used. Neither AraLAM nor ManLAM induced any significant direct activation of the NADPH-oxidase. Both LAMs, however, primed the neutrophils so that subsequent stimulation with the peptide chemoattractants fMet-Leu-Phe (fMLF), Trp-Lys-Tyr-Met-Val-DMet (WKYMVm) and the mammalian lactose-binding lectin galectin-3 resulted in a markedly enhanced oxidative response. The LAM-induced priming was accompanied by an increased exposure of complement receptors 1 and 3 as well as the formyl peptide receptor on the neutrophil surface, suggesting that the enhanced oxidative response could be due to upregulation of receptors on the cell surface as a result of granule mobilisation. Since LAM-primed neutrophils released 65% of the cell content of gelatinase but showed no increased release of vitamin B(12)-binding protein, mobilisation of the gelatinase granules rather than the specific granules is concluded to be responsible for the priming effects. This is in agreement with the subcellular localisation of receptors for fMLF, WKYMVm, as well as galectin-3, which are stored in the secretory vesicles and gelatinase granules. The priming effect appeared very similar to that of Escherichia coli lipopolysaccharide, and since no differences in activity could be detected between AraLAM and ManLAM, we hypothesize that the lipid anchor of the LAM is responsible for the priming effects.
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| 20. |
- Fäldt, Jenny, 1971, et al.
(författare)
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The phagocyte chemiluminescence paradox: luminol can act as an inhibitor of neutrophil NADPH-oxidase activity.
- 1999
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Ingår i: Luminescence : the journal of biological and chemical luminescence. - 1522-7235. ; 14:3, s. 153-60
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Tidskriftsartikel (refereegranskat)abstract
- The chemiluminescence system amplified by luminol or isoluminol is a sensitive and widely used method for determination of respiratory burst products generated by the NADPH-oxidase in phagocytes. The present study shows that luminol, but not isoluminol, can inhibit the release of oxygen metabolites generated by human neutrophil NADPH-oxidase. The difference in structure between luminol and isoluminol (rendering luminol more lipophilic than isoluminol, and thereby membrane-permeable), is suggested to determine indirectly whether or not the molecule is inhibitory. Luminol was shown to have an increased inhibitory effect after preincubation of neutrophils on a surface of aggregated IgG, suggesting that the cells can be transferred from a 'luminol-insensitive' to a 'luminol-sensitive' state. Since luminol had no inhibitory effect in a cell-free NADPH-oxidase system, it is likely that it interferes with the signal transduction pathway, leading to assembly and/or activation of the oxidase. As a consequence of the present results, showing that luminol but not isoluminol can inhibit NADPH-oxidase activity, we suggest that isoluminol is used in future studies of superoxide anion release from phagocytes.
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