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| 6. |
- Iregren, A, et al.
(författare)
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Effects on the nervous system in different groups of workers exposed to aluminium
- 2001
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Ingår i: Occupational and Environmental Medicine. ; 58, s. 453-60
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Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVE - To investigate possible neurotoxic effects in groups of aluminium pot room and foundry workers, aluminium welders, and a small group of workers exposed to aluminium in the production of flake powder.METHODS - Exposure to aluminium was evaluated with aluminium concentrations in blood and urine as well as a questionnaire. The groups exposed to aluminium were compared with a group of mild steel welders. Neurotoxic effects were studied with mood and symptom questionnaires and several psychological and neurophysiological tests.RESULTS - The pot room and foundry workers showed very low aluminium uptake as their aluminium concentrations in blood and urine were close to normal, and no effects on the nervous system were detected. The group of workers exposed to flake powder had high concentrations of aluminium in blood and urine, even higher than those of the aluminium welders. However, aluminium could not be shown to affect the functioning of the nervous system in flake powder producers. Although significant effects could not be shown in the present analysis of the data on welders, the performance of the welders exposed to high concentrations of aluminium was affected according to the analyses in the original paper from this group.CONCLUSIONS - For the pot room and foundry workers no effects related to the exposure to aluminium could be found. For the group of flake powder producers exposed for a short term no effects on the nervous systems were evident despite high levels of exposure. Due to the high concentrations of aluminium in the biological samples of this group, measures to reduce the exposure to aluminium are recommended, as effects on the central nervous system might develop after protracted exposures. However, this assumption needs to be verified in further studies.
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| 8. |
- Bloniecki, Victor, et al.
(författare)
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The Geras Solutions Cognitive Test for Assessing Cognitive Impairment : Normative Data from a Population-Based Cohort
- 2023
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Ingår i: The Journal of Prevention of Alzheimer's Disease. - : Springer. - 2274-5807 .- 2426-0266. ; 2:10, s. 207-211
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Tidskriftsartikel (refereegranskat)abstract
- Background: There is a need for the development of accurate, accessible and efficient screening instruments, focused on early-stage detection of neurocognitive disorders. The Geras Solutions cognitive test (GSCT) has showed potential as a digital screening tool for cognitive impairment but normative data are needed.Objective: The aim of this study was to obtain normative data for the GSCT in cognitively healthy patients, investigate the effects of gender and education on test scores as well as examine test-retest reliability.Methods: The population in this study consisted of 144 cognitively healthy subjects (MMSE>26) all at the age of 70 who were earlier included in the Healthy Aging Initiative Study conducted in Umea, Sweden. All patients conducted the GSCT and a subset of patients (n=32) completed the test twice in order to establish test-retest reliability.Results: The mean GSCT score was 46.0 (+/- 4.5) points. High level of education (>12 years) was associated with a high GSCT score (p = 0.02) while gender was not associated with GSCT outcomes (p = 0.5). GSCT displayed a high correlation between test and retest (r(30) = 0.8, p <0.01).Conclusion: This study provides valuable information regarding normative test-scores on the GSCT for cognitively healthy individuals and indicates education level as the most important predictor of test outcome. Additionally, the GSCT appears to display a good test-retest reliability further strengthening the validity of the test.
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| 9. |
- Brissman, M., et al.
(författare)
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Physical Fitness and Body Composition Two Years after Roux-En-Y Gastric Bypass in Adolescents
- 2017
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Ingår i: Obesity Surgery. - : Springer Science and Business Media LLC. - 0960-8923 .- 1708-0428. ; 27:2, s. 330-337
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Tidskriftsartikel (refereegranskat)abstract
- We have previously shown promising results 2 years after Roux-en-Y gastric bypass surgery, within the Adolescence Morbid Obesity Surgery study (AMOS). The aim of the current study was to describe the 2-year outcome in cardiorespiratory fitness, body composition, and functional capacity in the Stockholm subset of the AMOS study. Forty-one adolescents (10 male, 31 female, age 14-18 years, body mass index 35-69 kg center dot m(-2)) were included. In addition to anthropometric measurements, participants performed a submaximal bicycle test, 6-min walk test, dual-energy X-ray absorptiometry, and a short interview at baseline, 1 and 2 years after surgery. Relative improvements in maximal oxygen consumption (VO(2)max) per kilogram body mass (+62 %) and per kilogram fat-free mass (+21 %), as well as walking distance (+13 %) were observed after 1 year, and persisted 2 years after surgery. Despite a reduction of fat-free mass (-15 %), absolute VO(2)max was maintained across the full group (+8 %, p = ns) and significantly increased in non-smokers. Body mass and fat mass were significantly decreased (-45.4 and -33.3 kg, respectively). Self-reported physical activity was significantly increased, and pain associated with movement was reduced. In adolescents with obesity, Roux-en-Y gastric bypass improved VO(2)max more than could be explained by fat mass loss alone. In combination with improved functional capacity and body composition, these results suggest that surgery in adolescence might add specific benefits of importance for future health.
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| 12. |
- Buijs, J, et al.
(författare)
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Inter- and intra-molecular migration of peptide amide hydrogens during electrospray ionization
- 2001
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Ingår i: JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY. - : ELSEVIER SCIENCE INC. - 1044-0305. ; 12:4, s. 410-419
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Tidskriftsartikel (refereegranskat)abstract
- The isotopic exchange of amide hydrogens in proteins in solution strongly depends on the surrounding protein structure, thereby allowing structural studies of proteins by mass spectrometry. However, during electrospray ionization (ESI), gas phase processe
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| 13. |
- C. Lin, Yin, et al.
(författare)
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A global network of transcription factors, involving E2A, EBF1 and Foxo1, that orchestrates B cell fate
- 2010
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Ingår i: Nature Immunology. - : Nature Publishing Group. - 1529-2908 .- 1529-2916. ; 11:7, s. 635-U109
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Tidskriftsartikel (refereegranskat)abstract
- It is now established that the transcription factors E2A, EBF1 and Foxo1 have critical roles in B cell development. Here we show that E2A and EBF1 bound regulatory elements present in the Foxo1 locus. E2A and EBF1, as well as E2A and Foxo1, in turn, were wired together by a vast spectrum of cis-regulatory sequences. These associations were dynamic during developmental progression. Occupancy by the E2A isoform E47 directly resulted in greater abundance, as well as a pattern of monomethylation of histone H3 at lysine 4 (H3K4) across putative enhancer regions. Finally, we divided the pro-B cell epigenome into clusters of loci with occupancy by E2A, EBF and Foxo1. From this analysis we constructed a global network consisting of transcriptional regulators, signaling and survival factors that we propose orchestrates B cell fate.
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| 16. |
- Ekblad, M., et al.
(författare)
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Influence of operational conditions and wastewater properties on the removal of organic micropollutants through ozonation
- 2021
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Ingår i: Journal of Environmental Management. - : Elsevier BV. - 0301-4797. ; 286
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Tidskriftsartikel (refereegranskat)abstract
- The objective of this study was to evaluate the influence of operational conditions and wastewater properties on the removal of pharmaceuticals, contrast media and antibiotics through ozonation, in order to facilitate the optimization of treatment and its implementation on a full scale. Pilot-scale ozone oxidation trials were performed on treated wastewater, before and after post-precipitation, over a seven-month period, including summer and winter months. Hydraulic retention times as short as 7 min were found to be sufficient for organic micropollutant removal. A short hydraulic retention time reduces both investment costs and land use. Neither the choice of ozone dispersion method, a static mixer or a Venturi injector, nor the wastewater temperature had any significant effect on the removal efficiency of organic micropollutants, however, higher removal was achieved after on-site post-precipitation with aluminum chloride.
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| 17. |
- Ekblad, M., et al.
(författare)
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Is dissolved COD a suitable design parameter for ozone oxidation of organic micropollutants in wastewater?
- 2019
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Ingår i: Science of the Total Environment. - : Elsevier BV. - 0048-9697. ; 658, s. 449-456
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Tidskriftsartikel (refereegranskat)abstract
- Ozone oxidation of organic micropollutants in biologically treated wastewater was investigated in pilot-scale after a high- and a low loaded activated sludge process. Higher ozone doses were required to remove organic micropollutants in the effluent wastewater from the high loaded activated sludge process. Further comparison of the micropollutant removal was based on normalized ozone doses, expressed as g O3/g DOC and g O3/g soluble COD (sCOD). A clear difference was noted for the two effluents when the micropollutant removal was normalized by DOC. This difference disappeared almost completely when the removal was linked to ozone doses normalized by sCOD. The dose-response curves for the organic micropollutants were practically linear in the removal range up to 95%. A linear prediction model was developed and compared with literature values to test the transferability of the obtained results. Results from this comparison indicated that the slope of the dose-response functions could be used to predict the removal efficiency of organic micropollutants at a third plant with an average uncertainty of 10%. The modeled ozone requirements were then set in relation to the COD concentrations in the discharged water from approximately 90 Swedish activated sludge treatment plants with and without nitrogen removal. This comparison highlighted the need for a well-functioning biological treatment for an effective ozone oxidation of organic micropollutants. The results in this study suggest that soluble COD should be further explored for design and modeling of ozone oxidation of organic micropollutants in biologically treated wastewater.
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| 18. |
- El-taliawy, H., et al.
(författare)
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Ozonation efficiency in removing organic micro pollutants from wastewater with respect to hydraulic loading rates and different wastewaters
- 2017
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Ingår i: Chemical Engineering Journal. - : Elsevier BV. - 1385-8947. ; 325, s. 310-321
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Tidskriftsartikel (refereegranskat)abstract
- Organic micro pollutants can be removed from water by ozonation. In this article we studied the performance of ozonation under real life conditions and compared results of the same ozonation pilot plant installed at different wastewater treatment plants (WWTPs) thus operating with different waters. The comparability of the removal and reaction rate constants from one waste water treatment plant were low in respect to reaction rate, removal as well as to response to the specific ozone dose. Neither pH-value nor residual nitrite concentrations were the driving force considering these differences. Further tests with different loadings were conducted at the same WWTP under different weather conditions. For the different hydraulic loading of the biological plant, the ozonation was running with rather similar removal rates concerning the same specific (TOC normalized) ozone dose. The compounds that were removed quantitatively under dry weather were still removed well with three times dry weather flow. Using a dataset from one WWTP to optimize operation in another one is thus questionable.
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| 23. |
- Hagman, A., et al.
(författare)
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Obstetric Outcomes in Women With Turner Karyotype EDITORIAL COMMENT
- 2012
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Ingår i: Obstetrical and Gynecological Survey. - 0029-7828. ; 67:4, s. 228-229
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- There is concern over the high risk of cardiovascular complications, hypertensive disorders, and other adverse obstetric outcomes among pregnant women with Turner syndrome (TS). A diagnosis of TS is made in some women late in life or not at all. Spontaneous pregnancies are rare in women with TS and are associated with a high rate of complications, especially miscarriage. The use of assisted reproductive techniques is an option for these women; pregnancy and implantation rates after oocyte donation in women with TS seem to be comparable with those without TS who need this treatment. Few data are available on obstetric outcome in pregnant women with TS. The aim of this retrospective population-based cohort study was to compare maternal and neonatal outcomes among singleton pregnancies of women with and without TS. Data on births occurring between 1973 and 2007 from the Swedish Genetic Turner Register and the Swedish Medical Birth Register were cross-linked. Obstetric outcome in infants born to women with TS was compared with a reference group of 56,000 women from the general population. Mean gestational age and birth weight were adjusted for maternal age. Outcome in TS women with twins was described separately. A total of 115 women with TS gave birth to 208 children (202 singletons and 3 sets of twins) during the study period. The TS diagnosis was unknown in 52% of the women before the first delivery. Women in the TS group were older at the first delivery than women in the reference group; median age was 30 years and 26 years, respectively (P < 0.0001). There was a trend toward more women with TS having preeclampsia during their first pregnancy (6.3 vs. 3.0%; P = 0.07). One woman suffered from an aortic dissection during her second spontaneous pregnancy. Compared with the reference group, the median gestational age was shorter in children in the TS group (-6.4 days, P = 0.0067), and median birth weight was lower (-208 g, P = 0.001); however, no significant difference was found in median standard deviation scores for weight and length at birth. The rate of cesarean delivery was higher in the TS group than in the reference group (35.6% vs. 11.8%, respectively, P < 0.0001). There was no significant difference in birth defects between groups. These findings show that women with a TS karyotype have mostly favorable obstetric outcomes. Singletons of women with TS have a shorter gestational age but a similar size at birth. The data also show no difference in birth defects between women with and without TS.
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| 30. |
- Jeong, S. H., et al.
(författare)
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Liquid alloy printing of microfluidic stretchable electronics
- 2012
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Ingår i: Lab on a Chip. - : Royal Society of Chemistry (RSC). - 1473-0197 .- 1473-0189. ; 12:22, s. 4657-4664
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Tidskriftsartikel (refereegranskat)abstract
- Recently, microfluidic stretchable electronics has attracted great interest from academia since conductive liquids allow for larger cross-sections when stretched and hence low resistance at longer lengths. However, as a serial process it has suffered from low throughput, and a parallel processing technology is needed for more complex systems and production at low costs. In this work, we demonstrate such a technology to implement microfluidic electronics by stencil printing of a liquid alloy onto a semi-cured polydimethylsiloxane (PDMS) substrate, assembly of rigid active components, encapsulation by pouring uncured PDMS on-top and subsequent curing. The printing showed resolution of 200 μm and linear resistance increase of the liquid conductors when elongated up to 60%. No significant change of resistance was shown for a circuit with one LED after 1000 times of cycling between a 0% and an elongation of 60% every 2 s. A radio frequency identity (RFID) tag was demonstrated using the developed technology, showing that good performance could be maintained well into the radio frequency (RF) range.
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| 31. |
- Johnsson, A., et al.
(författare)
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A randomized phase III trial on maintenance treatment with bevacizumab alone or in combination with erlotinib after chemotherapy and bevacizumab in metastatic colorectal cancer : the Nordic ACT Trial
- 2013
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Ingår i: Annals of Oncology. - : Elsevier BV. - 0923-7534 .- 1569-8041. ; 24:9, s. 2335-2341
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Tidskriftsartikel (refereegranskat)abstract
- Background: The main objective was to study the effect on progression-free survival (PFS) of adding erlotinib to bevacizumab as maintenance treatment following chemotherapy and bevacizumab as first-line treatment of metastatic colorectal cancer (mCRC). Patients and methods: Patients with untreated mCRC received doublet chemotherapy + bevacizumab during 18 weeks and those without tumor progression were eligible for randomization to bevacizumab + erlotinib (arm A) or bevacizumab alone (arm B), until progression or unacceptable toxic effect. Results: Of the 249 patients enrolled, 80 started maintenance treatment in arm A and 79 in arm B. The rate of any grade 3/4 toxic effect was 53% in arm A and 13% in arm B. Median PFS was 5.7 months in arm A and 4.2 months in arm B (HR = 0.79; 95% confidence interval 0.55-1.12; P = 0.19). Overall survival (OS) from start of induction chemotherapy was 26.7 months in the randomized population, with no difference between the two arms. Conclusions: The addition of erlotinib to bevacizumab as maintenance treatment after first-line chemotherapy in mCRC did not improve PFS significantly. On-going clinical and translational studies focus on identifying subgroups of patients that may benefit from erlotinib in the maintenance setting.
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| 32. |
- LINDHOLM, C, et al.
(författare)
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A nutrition study in juvenile elite gymnasts
- 1995
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Ingår i: Acta paediatrica (Oslo, Norway : 1992). - : Wiley. - 0803-5253 .- 1651-2227. ; 84:3, s. 273-277
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Tidskriftsartikel (refereegranskat)
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| 33. |
- Loren, N., et al.
(författare)
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Fluorescence recovery after photobleaching in material and life sciences: putting theory into practice
- 2015
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Ingår i: Quarterly Reviews of Biophysics. - : Cambridge University Press (CUP). - 0033-5835 .- 1469-8994. ; 48:3, s. 323-387
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Tidskriftsartikel (refereegranskat)abstract
- Fluorescence recovery after photobleaching (FRAP) is a versatile tool for determining diffusion and interaction/binding properties in biological and material sciences. An understanding of the mechanisms controlling the diffusion requires a deep understanding of structure-interaction-diffusion relationships. In cell biology, for instance, this applies to the movement of proteins and lipids in the plasma membrane, cytoplasm and nucleus. In industrial applications related to pharmaceutics, foods, textiles, hygiene products and cosmetics, the diffusion of solutes and solvent molecules contributes strongly to the properties and functionality of the final product. All these systems are heterogeneous, and accurate quantification of the mass transport processes at the local level is therefore essential to the understanding of the properties of soft (bio)materials. FRAP is a commonly used fluorescence microscopy-based technique to determine local molecular transport at the micrometer scale. A brief high-intensity laser pulse is locally applied to the sample, causing substantial photobleaching of the fluorescent molecules within the illuminated area. This causes a local concentration gradient of fluorescent molecules, leading to diffusional influx of intact fluorophores from the local surroundings into the bleached area. Quantitative information on the molecular transport can be extracted from the time evolution of the fluorescence recovery in the bleached area using a suitable model. A multitude of FRAP models has been developed over the years, each based on specific assumptions. This makes it challenging for the non-specialist to decide which model is best suited for a particular application. Furthermore, there are many subtleties in performing accurate FRAP experiments. For these reasons, this review aims to provide an extensive tutorial covering the essential theoretical and practical aspects so as to enable accurate quantitative FRAP experiments for molecular transport measurements in soft (bio)materials.
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| 34. |
- Lundback, V, et al.
(författare)
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Thyroid-Stimulating Hormone, Degree of Obesity, and Metabolic Risk Markers in a Cohort of Swedish Children with Obesity
- 2017
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Ingår i: Hormone research in paediatrics. - : S. Karger AG. - 1663-2826 .- 1663-2818. ; 88:2, s. 140-146
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Tidskriftsartikel (refereegranskat)abstract
- <b><i>Background/Aims:</i></b> Thyroid-stimulating hormone (TSH) is affected in obesity and might influence metabolic risk. It is unclear what mechanisms cause elevated TSH in obesity. We aimed to investigate TSH status within the normal range and the association of TSH with degree of obesity and metabolic parameters in children with obesity. <b><i>Methods:</i></b> A total of 3,459 children, aged 3.0–17.9 years, were identified in the Swedish Childhood Obesity Treatment Registry, BORIS. Age, gender, TSH, free triiodothyronine (fT3), free thyroxine (fT4), body mass index standard deviation scores (BMI SDS), as well as variables of lipid and glucose metabolism were examined. <b><i>Results:</i></b> Children with high-normal TSH (>3.0 mU/L) (28.8%) had higher BMI SDS compared to children with low-normal TSH (<3.0 mU/L) (<i>p</i> < 0.001). Multivariable regression analysis adjusted for age and gender showed that TSH levels were associated with BMI SDS (β: 0.21, 95% CI: 0.14–0.28, <i>p</i> < 0.001). Associations of thyroid hormones with markers of lipid and glucose metabolism were observed, where TSH was associated with fasting insulin, HOMA (homeostatic model assessment of insulin resistance), total cholesterol, and triglycerides. <b><i>Conclusions:</i></b> A positive association between TSH levels and BMI SDS was seen in children with obesity. Associations of TSH and free thyroid hormones with glucose metabolism indicated that TSH might be one of several factors acting to determine body weight and obesity co-morbidities, although the underlying mechanism remains unclear.
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| 37. |
- Ricci Hagman, J., et al.
(författare)
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Multiple miscarriages in two sisters of Thai origin with the rare Pk phenotype caused by a novel nonsense mutation at the B3GALNT1 locus
- 2019
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Ingår i: Transfusion Medicine. - : Wiley. - 0958-7578. ; 29:3, s. 202-208
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Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVES: To determine the genetic background underlying the Pk phenotype in two Thai sisters suffering from multiple spontaneous abortions.BACKGROUND: The P antigen is carried by globoside, an abundant glycosphingolipid in the red blood cell (RBC) membrane. Inactivating mutations in the 3-β-N-acetylgalactosaminyltransferase gene (B3GALNT1) give rise to the rare Pk phenotype, which lack the P and PX2 antigens. Consequently, naturally occurring anti-P may cause recurrent miscarriages following the cytotoxic attack of the globoside-rich fetal portion of the placenta.METHODS/MATERIALS: P/P1/PX2/Pk antigens on RBCs and their corresponding antibodies were detected by haemagglutination and flow cytometry. The B3GALNT1 coding region was sequenced, and an allele-specific polymerase chain reaction (PCR) was developed.RESULTS: The two sisters had suffered 8 and 11 miscarriages, most of which occurred in the first trimester. Anti-P and anti-PX2 were identified in their plasmas, and the RBCs typed as P-PX2-Pk +, i.e. had the Pk phenotype. Sequencing revealed homozygosity for a nonsense mutation, c.420T>G, in B3GALNT1. This substitution introduces a premature stop codon, p.Tyr140Ter, which is predicted to abolish enzymatic activity. Screening of 384 Thai donors indicated an allele frequency of 0·13%.CONCLUSION: We describe a novel nonsense mutation (c.420T>G) in B3GALNT1 (GLOB*01N·13), which was added to the 12 alleles already known in the GLOB system.
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| 38. |
- Sindi, S., et al.
(författare)
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Multimodal Preventive Trial for Alzheimer’s Disease : MIND-ADmini Pilot Trial Study Design and Progress
- 2022
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Ingår i: The Journal of Prevention of Alzheimer's Disease. - : Serdi-Editions. - 2274-5807 .- 2426-0266. ; 9:1, s. 30-39
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Tidskriftsartikel (refereegranskat)abstract
- Background: Interventions simultaneously targeting multiple risk factors and mechanisms are most likely to be effective in preventing cognitive impairment. This was indicated in the Finnish Geriatric Intervention Study to Prevent Cognitive Impairment and Disability (FINGER) testing a multidomain lifestyle intervention among at-risk individuals. The importance of medical food at the early symptomatic disease stage, prodromal Alzheimer’s disease (AD), was emphasized in the LipiDiDiet trial. The feasibility and effects of multimodal interventions in prodromal AD are unclear. Objectives: To evaluate the feasibility of an adapted FINGER-based multimodal lifestyle intervention, with or without medical food, among individuals with prodromal AD. Methods: MIND-ADmini is a multinational proof-of-concept 6-month randomized controlled trial (RCT), with four trial sites (Sweden, Finland, Germany, France). The trial targeted individuals with prodromal AD defined using the International Working Group-1 criteria, and with vascular or lifestyle-related risk factors. The parallel-group RCT includes three arms: 1) multimodal lifestyle intervention (nutritional guidance, exercise, cognitive training, vascular/metabolic risk management and social stimulation); 2) multimodal lifestyle intervention+medical food (Fortasyn Connect); and 3) regular health advice/ care (control group). Primary outcomes are feasibility and adherence. Secondary outcomes are adherence to the individual intervention domains and healthy lifestyle changes. Results: Screening began on 28 September 2017 and was completed on 21 May 2019. Altogether 93 participants were randomized and enrolled. The intervention proceeded as planned. Conclusions: For the first time, this pilot trial tests the feasibility and adherence to a multimodal lifestyle intervention, alone or combined with medical food, among individuals with prodromal AD. It can serve as a model for combination therapy trials (non-pharma, nutrition-based and/or pharmacological interventions).
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