| 1. |
- Hardell, L, et al.
(författare)
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In utero exposure to persistent organic pollutants in relation to testicular cancer risk
- 2006
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Ingår i: International Journal of Andrology. - : Wiley. - 0105-6263 .- 1365-2605. ; 29:1, s. 228-234
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Tidskriftsartikel (refereegranskat)abstract
- Testicular cancer is the most common tumour type in young men. In Sweden the annual age-adjusted incidence increased significantly by 2.4% during the time period 1984-1993 and during 1994-2003 by 1.4%. Exposure to endocrine disrupting chemicals during the foetal period has been postulated to be a risk factor. In this investigation we studied the concentrations of chlorinated biphenyls (PCBs), p,p'-dichlorodiphenyl-dichloroethylene (pp'-DDE), hexachlorobenzene (HCB), chlordanes and polybrominated diphenylethers (PBDEs) in 58 cases with testicular cancer and 61 age-matched controls. Furthermore, case and control mothers were also asked to participate and 44 case mothers and 45 control mothers agreed. No significant differences were found between cases and controls. Case mothers had in general higher concentrations of these chemicals. For the sum of PCBs an odds ratio (OR) = 3.8, 95% confidence interval (CI) = 1.4-10 was calculated using the median concentration for the controls as cut-off value. For HCB OR = 4.4, CI = 1.7-12 and for PBDE OR = 2.5, 95% Cl = 1.02-6.0 were obtained, whereas OR was not significantly increased for pp'-DDE and sum of chlordanes. The cases were born during a period with high concentrations of persistent organic pollutants (POPs) in humans. The decline of the increasing incidence of testicular cancer during recent years may reflect decreasing body burden of certain POPs since the 1980s.
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| 2. |
- Hardell, Lennart, et al.
(författare)
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Long-term use of cellular phones and brain tumours : increased risk associated with use for ≥10 years
- 2007
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Ingår i: Occupational and Environmental Medicine. - London : BMJ Publishing Group. - 1351-0711 .- 1470-7926. ; 64, s. 626-632
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Tidskriftsartikel (refereegranskat)abstract
- AIM: To evaluate brain tumour risk among long-term users of cellular telephones. METHODS: Two cohort studies and 16 case-control studies on this topic were identified. Data were scrutinised for use of mobile phone for > or =10 years and ipsilateral exposure if presented. RESULTS: The cohort study was of limited value due to methodological shortcomings in the study. Of the 16 case-control studies, 11 gave results for > or =10 years' use or latency period. Most of these results were based on low numbers. An association with acoustic neuroma was found in four studies in the group with at least 10 years' use of a mobile phone. No risk was found in one study, but the tumour size was significantly larger among users. Six studies gave results for malignant brain tumours in that latency group. All gave increased odd ratios (OR), especially for ipsilateral exposure. In a meta-analysis, ipsilateral cell phone use for acoustic neuroma was OR = 2.4 (95% CI 1.1 to 5.3) and OR = 2.0, (1.2 to 3.4) for glioma using a tumour latency period of > or =10 years. CONCLUSIONS: Results from present studies on use of mobile phones for > or =10 years give a consistent pattern of increased risk for acoustic neuroma and glioma. The risk is highest for ipsilateral exposure.
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| 3. |
- Holmqvist, Rolf, et al.
(författare)
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Deliberate self-harm behaviour in Swedish adolescent girls reports from public assessment and treatment agencies
- 2008
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Ingår i: Child and Youth Care Forum. - : Springer Science and Business Media LLC. - 1053-1890 .- 1573-3319. ; 37:1
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Tidskriftsartikel (refereegranskat)abstract
- Self-harming behaviour among adolescents, and particularly adolescent girls, has evoked much public attention. This article presents a Swedish study about what information assessment and treatment agencies have about self-harming behaviour in the form of cutting and burning in adolescent girls. The study was made on assignment by the Swedish National Board of Health and Welfare. All public agencies assessing or treating adolescents with psychological problems in three Swedish cities were asked to deliver information about self-harming behaviour in the form of self-cutting or self-burning in girls between 13 and 18 years of age. In addition, the young offender institutions within the National Board of Institutional Care treating teenager girls were asked to deliver information about self-harming behaviour in their clients. We found that about 1% of the total population of girls in these ages were known to have cut or burnt themselves and about one third of the girls in the institutions. Attempts to distinguish subgroups among the girls were only partly successful. Although some subgroups could be identified, the overlap between them was large. The conclusion was that this behaviour may be seen as an expression of a wide variety of problems in a heterogeneous group of young persons. © 2007 Springer Science+Business Media, LLC.
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| 4. |
- Lee, Min S, et al.
(författare)
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Micelle-induced folding of spinach thylakoid soluble phosphoprotein of 9 kDa and its functional implications
- 2006
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Ingår i: Biochemistry. - : American Chemical Society (ACS). - 1520-4995 .- 0006-2960. ; 45:51, s. 15633-43
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Tidskriftsartikel (refereegranskat)abstract
- Thylakoid soluble phosphoprotein of 9 kDa (TSP9) has been identified as a plant-specific protein in the photosynthetic thylakoid membrane (Carlberg et al. (2003) Proc. Natl. Acad. Sci. 100, 757-762). Nonphosphorylated TSP9 is associated with the membrane, whereas, after light-induced phosphorylation, a fraction of the phosphorylated TSP9 is released into the aqueous stroma. By NMR spectroscopy, we have determined the structural features of nonphosphorylated TSP9 both in aqueous solution and in membrane mimetic micelles. The results show that both wild type nonphosphorylated TSP9 and a triple-mutant (T46E + T53E + T60E) mimic of the triphosphorylated form of TSP9 are disordered under aqueous conditions, but adopt an ordered conformation in the presence of detergent micelles. The micelle-induced structural features, which are similar in micelles either of SDS or dodecylphosphocholine (DPC), consist of an N-terminal alpha-helix, which may represent the primary site of interaction between TSP9 and binding partners, and a less structured helical turn near the C-terminus. These structured elements contain mainly hydrophobic residues. NMR relaxation data for nonphosphorylated TSP9 in SDS micelles indicated that the molecule is highly flexible with the highest order in the N-terminal alpha-helix. Intermolecular NOE signals, as well as spin probe-induced broadening of NMR signals, demonstrated that the SDS micelles contact both the structured and a portion of the unstructured regions of TSP9, in particular, those containing the three phosphorylation sites (T46, T53, and T60). This interaction may explain the selective dissociation of phosphorylated TSP9 from the membrane. Our study presents a structural model for the role played by the structured and unstructured regions of TSP9 in its membrane association and biological function.
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| 5. |
- Mullan, Rebecca J, et al.
(författare)
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Systematic reviewers commonly contact study authors but do so with limited rigor.
- 2009
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Ingår i: Journal of Clinical Epidemiology. - : Elsevier BV. - 0895-4356 .- 1878-5921. ; 62:2, s. 138-142
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Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVES: Author contact can enhance the quality of systematic reviews. We conducted a systematic review of the practice of author contact in recently published systematic reviews to characterize its prevalence, quality, and results. STUDY DESIGN AND SETTING: Eligible studies were systematic reviews of efficacy published in 2005-2006 in the 25 journals with the highest impact factor publishing systematic reviews in clinical medicine and the Cochrane Library, identified by searching MEDLINE, EMBASE, and the Cochrane Library. Two researchers determined whether and why reviewers contacted authors. To assess the accuracy of the abstracted data, we surveyed reviewers by e-mail. RESULTS: Forty-six (50%) of the 93 eligible systematic reviews published in top journals and 46 (85%) of the 54 eligible Cochrane reviews reported contacting authors of eligible studies. Requests were made most commonly for missing information: 40 (76%) clinical medicine reviews and 45 (98%) Cochrane reviews. One hundred and nine of 147 (74%) reviewers responded to the survey, and reported a higher rate of author contact than apparent from the published record. CONCLUSION: Although common, author contact is not a universal feature of systematic reviews published in top journals and the Cochrane Library. The conduct and reporting of author contact purpose, procedures, and results require improvement.
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| 6. |
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