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Sökning: WFRF:(Albin Maria)

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1.
  • Klionsky, Daniel J, et al. (författare)
  • Guidelines for the use and interpretation of assays for monitoring autophagy
  • 2012
  • Ingår i: Autophagy. - Landes Bioscience. - 1554-8635. ; 8:4, s. 445-544
  • Forskningsöversikt (refereegranskat)abstract
    • In 2008 we published the first set of guidelines for standardizing research in autophagy. Since then, research on this topic has continued to accelerate, and many new scientists have entered the field. Our knowledge base and relevant new technologies have also been expanding. Accordingly, it is important to update these guidelines for monitoring autophagy in different organisms. Various reviews have described the range of assays that have been used for this purpose. Nevertheless, there continues to be confusion regarding acceptable methods to measure autophagy, especially in multicellular eukaryotes. A key point that needs to be emphasized is that there is a difference between measurements that monitor the numbers or volume of autophagic elements (e.g., autophagosomes or autolysosomes) at any stage of the autophagic process vs. those that measure flux through the autophagy pathway (i.e., the complete process); thus, a block in macroautophagy that results in autophagosome accumulation needs to be differentiated from stimuli that result in increased autophagic activity, defined as increased autophagy induction coupled with increased delivery to, and degradation within, lysosomes (in most higher eukaryotes and some protists such as Dictyostelium) or the vacuole (in plants and fungi). In other words, it is especially important that investigators new to the field understand that the appearance of more autophagosomes does not necessarily equate with more autophagy. In fact, in many cases, autophagosomes accumulate because of a block in trafficking to lysosomes without a concomitant change in autophagosome biogenesis, whereas an increase in autolysosomes may reflect a reduction in degradative activity. Here, we present a set of guidelines for the selection and interpretation of methods for use by investigators who aim to examine macroautophagy and related processes, as well as for reviewers who need to provide realistic and reasonable critiques of papers that are focused on these processes. These guidelines are not meant to be a formulaic set of rules, because the appropriate assays depend in part on the question being asked and the system being used. In addition, we emphasize that no individual assay is guaranteed to be the most appropriate one in every situation, and we strongly recommend the use of multiple assays to monitor autophagy. In these guidelines, we consider these various methods of assessing autophagy and what information can, or cannot, be obtained from them. Finally, by discussing the merits and limits of particular autophagy assays, we hope to encourage technical innovation in the field.
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2.
  • Albin, Maria, et al. (författare)
  • Aktuella arbets- och miljömedicinska problem
  • 2010
  • Ingår i: Arbets- och miljömedicin - en lärobok om hälsa och miljö. - Studentlitteratur AB. - 978-91-44-05399-8 ; s. 165-176
  • Bokkapitel (refereegranskat)
3.
  • Edling, Christer, et al. (författare)
  • Arbets- och miljömedicin- begrepp och trender
  • 2009
  • Ingår i: Arbets- och miljömedicin - en lärobok om hälsa och miljö. - Studentlitteratur AB. - 978-91-44-05399-8 ; s. 13-24
  • Bokkapitel (refereegranskat)
4.
5.
  • Albin, Maria, et al. (författare)
  • Risk Assessment for Carbon Nanotubes
  • 2011
  • Ingår i: Arbete och Hälsa. - Occupational and Environmental Medicine, Sahlgrenska Academy, University of Gothenburg. - 0346-7821. ; 45:5, s. 1-1
  • Konferensbidrag (refereegranskat)
6.
  • Hedmer, Maria, et al. (författare)
  • Validation of urinary excretion of cyclophosphamide as a biomarker of exposure by studying its renal clearance at high and low plasma concentrations in cancer patients
  • 2008
  • Ingår i: International Archives of Occupational and Environmental Health. - Springer. - 1432-1246. ; 81:3, s. 285-293
  • Tidskriftsartikel (refereegranskat)abstract
    • OBJECTIVES: Cyclophosphamide (CP) is an alkylating agent classified as a human carcinogen. Health care workers handling this drug may be exposed during, e.g., preparation or administration. Cyclophosphamide is readily absorbed by inhalation and by dermal uptake. A biomarker, CP in urine, has frequently been used to assess the occupational exposure to CP, but has not been fully validated. The aim of this study was to investigate if the proportion of the CP dose that is excreted in urine (renal clearance) is constant over different plasma drug concentrations and other pharmacokinetic parameters, e.g., urine flow. METHODS: Pharmacokinetics of CP were studied in 16 breast cancer patients that were treated with postoperative adjuvant chemotherapy including CP. Plasma and urine from the patients were collected at different occasions up to 12 days after the dose. Urine was collected during 4-h periods and blood was sampled at the end of each period. Analysis of CP was performed by liquid chromatography tandem mass spectrometry. The limit of detection for CP in urine and plasma was 0.01 and 0.02 ng/ml, respectively. The precisions of the developed methods were determined to </=8%. RESULTS: The administered doses of CP in absolute amounts ranged between 800 and 2,240 mg. Mean renal clearance of CP was 8.6 (confidence interval 6.5-10.7) ml/min and was not significantly dependent of the plasma drug concentration. However, a significant correlation between renal clearance and urine flow was observed. There was a large inter-individual variation in the plasma and urine concentrations even when the same doses were given. CONCLUSIONS: Cyclophosphamide in urine can be continued to be used as a biomarker to monitor occupational exposure to CP, however the inter-individual variability of excretion of CP in urine, and its dependency on urine flow must be taken into consideration in future applications.
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7.
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8.
  • Xu, Yiyi, et al. (författare)
  • Occupational exposure to particles and mitochondrial DNA : : Relevance for blood pressure
  • 2017
  • Ingår i: Environmental Health: A Global Access Science Source. - BioMed Central. - 1476-069X. ; 16:1
  • Tidskriftsartikel (refereegranskat)abstract
    • Background: Particle exposure is a risk factor for cardiovascular diseases. Mitochondrial DNA (mtDNA) is a primary target for oxidative stress generated by particle exposure. We aimed to elucidate the effects of occupational exposure to particle-containing welding fumes on different biomarkers of mtDNA function, and in turn, explore if they modify the association between particle exposure and cardiovascular response, measured as blood pressure. Methods: We investigated 101 welders and 127 controls (all non-smoking males) from southern Sweden. Personal sampling of the welders’ exposure to respirable dust was performed during work hours (average sampling time: 6.8 h; range: 2.4-8.6 h) and blood pressure was measured once for each subject. We measured relative mtDNA copy number by quantitative PCR and methylation of the mitochondrial regulatory region D-loop and the tRNA encoding gene MT-TF by bisulfite-pyrosequencing. We calculated the relative number of unmethylated D-loop and MT-TF as markers of mtDNA function to explore the modification of mtDNA on the association between particle exposure and blood pressure. General linear models were used for statistical analyses. Results: Welders had higher mtDNA copy number (β = 0.11, p = 0.003) and lower DNA methylation of D-loop (β = −1.4, p = 0.002) and MT-TF (β = −1.5, p = 0.004) than controls. Higher mtDNA copy number was weakly associated with higher personal respirable dust exposure among welders with exposure level above 0.7 mg/m3 (β = 0.037, p = 0.054). MtDNA function modified the effect of welding fumes on blood pressure: welders with low mtDNA function had higher blood pressure than controls, while no such difference was found in the group with high mtDNA function. Conclusion: Increased mtDNA copy number and decreased D-loop and MT-TF methylation were associated with particle-containing welding fumes exposure, indicating exposure-related oxidative stress. The modification of mtDNA function on exposure-associated increase in blood pressure may represent a mitochondria-environment interaction.
9.
  • Albin, Maria, et al. (författare)
  • 0253 Hairdressers are occupationally exposed to ortho- and meta- toluidine
  • 2014
  • Ingår i: Occupational and Environmental Medicine. - BMJ Publishing Group. - 1470-7926. ; 71 Suppl 1, s. 32-33
  • Tidskriftsartikel (refereegranskat)abstract
    • Hairdressing work is classified as carcinogenic based on excess risk for bladder cancer. We aimed at evaluating if current hairdressers are exposed to established/suspected bladder carcinogens (aromatic amines) and indicate possible sources of exposure.
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10.
  • Albin, Maria, et al. (författare)
  • Acute myeloid leukemia and clonal chromosome aberrations in relation to past exposure to organic solvents
  • 2000
  • Ingår i: Scandinavian Journal of Work, Environment and Health. - Finnish Institute of Occupational Health. - 0355-3140. ; 26:6, s. 482-491
  • Tidskriftsartikel (refereegranskat)abstract
    • OBJECTIVES: The effects of occupational and leisure-time exposures on the risk of acute myeloid leukemia (AML) were investigated with emphasis on clonal chromosome aberrations (CCA) and morphological subtypes. METHODS: Consecutively diagnosed cases of AML (N=333) and 1 population referent per case were retrospectively included in the study. Information on worktasks, companies, and leisure-time activities was obtained with telephone interviews. Exposure probability and intensity were assessed by occupational hygienists. Associations were evaluated with logistic regression. RESULTS: Exposure to organic solvents was associated with an increased risk of AML [low exposure: OR 1.5 (95% confidence interval (95% CI) 1.0-2.3, moderate-high exposure: OR 2.3 (95% CI 1.0-5.0)]. For exposure to solvents, but not to benzene, the OR was 1.2 (95% CI 0.69-2.0) for "low" and 2.7 (95% CI 1.0-7.3) for "moderate-high" exposure. The observed effects increased with intensity and duration of exposure. The estimated effects were higher for patients >60 years of age at the time of diagnosis. The effect of exposure to organic solvents was not differential with regard to morphology [except possibly erythroleukemia: OR 4.2, 95% CI 1.0-17 or the presence of CCA in general]. No increased risk for AML with complex CCA or with total or partial losses of chromosomes 5 or 7 were observed, but a higher risk was found for AML with trisomy 8 (OR 11, 95% CI 2.7-42) as the sole aberration. CONCLUSIONS: Exposure to organic solvents was associated with an increased risk of AML. This association was not due to benzene exposure alone and may be modified by age. Furthermore, specific associations with trisomy 8, and possibly also erythroleukemia, were suggested.
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