| 1. |
- Klionsky, Daniel J., et al.
(författare)
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Guidelines for the use and interpretation of assays for monitoring autophagy in higher eukaryotes
- 2008
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Ingår i: Autophagy. - : Landes Bioscience. - 1554-8627 .- 1554-8635. ; 4:2, s. 151-175
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Forskningsöversikt (refereegranskat)abstract
- Research in autophagy continues to accelerate,1 and as a result many new scientists are entering the field. Accordingly, it is important to establish a standard set of criteria for monitoring macroautophagy in different organisms. Recent reviews have described the range of assays that have been used for this purpose.2,3 There are many useful and convenient methods that can be used to monitor macroautophagy in yeast, but relatively few in other model systems, and there is much confusion regarding acceptable methods to measure macroautophagy in higher eukaryotes. A key point that needs to be emphasized is that there is a difference between measurements that monitor the numbers of autophagosomes versus those that measure flux through the autophagy pathway; thus, a block in macroautophagy that results in autophagosome accumulation needs to be differentiated from fully functional autophagy that includes delivery to, and degradation within, lysosomes (in most higher eukaryotes) or the vacuole (in plants and fungi). Here, we present a set of guidelines for the selection and interpretation of the methods that can be used by investigators who are attempting to examine macroautophagy and related processes, as well as by reviewers who need to provide realistic and reasonable critiques of papers that investigate these processes. This set of guidelines is 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 verify an autophagic response.
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| 2. |
- van de Sande-Bruinsma, Nienke, et al.
(författare)
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Antimicrobial drug use and resistance in Europe
- 2008
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Ingår i: Emerging Infectious Diseases. - : Centers for Disease Control and Prevention (CDC). - 1080-6040 .- 1080-6059. ; 14:11, s. 1722-30
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Tidskriftsartikel (refereegranskat)abstract
- Our study confronts the use of antimicrobial agents in ambulatory care with the resistance trends of 2 major pathogens, Streptococcus pneumoniae and Escherichia coli, in 21 European countries in 2000-2005 and explores whether the notion that antimicrobial drug use determines resistance can be supported by surveillance data at national aggregation levels. The data obtained from the European Surveillance of Antimicrobial Consumption and the European Antimicrobial Resistance Surveillance System suggest that variation of consumption coincides with the occurrence of resistance at the country level. Linear regression analysis showed that the association between antimicrobial drug use and resistance was specific and robust for 2 of 3 compound pathogen combinations, stable over time, but not sensitive enough to explain all of the observed variations. Ecologic studies based on routine surveillance data indicate a relation between use and resistance and support interventions designed to reduce antimicrobial drug consumption at a national level in Europe.
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| 3. |
- Messias, M. J, et al.
(författare)
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The Greenland Sea tracer experiment 1996–2002: Horizontal mixing and transport of Greenland Sea Intermediate Water
- 2008
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Ingår i: Progress In Oceanography. - : Elsevier BV. - 0079-6611. ; 78:1, s. 85-105
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Tidskriftsartikel (refereegranskat)abstract
- In summer 1996, a tracer release experiment using sulphur hexafluoride (SF6) was launched in the intermediate-depth waters of the central Greenland Sea (GS), to study the mixing and ventilation processes in the region and its role in the northern limb of the Atlantic overturning circulation. Here we describe the hydrographic context of the experiment, the methods adopted and the results from the monitoring of the horizontal tracer spread for the 1996–2002 period documented by 10 shipboard surveys. The tracer marked “Greenland Sea Arctic Intermediate Water” (GSAIW). This was redistributed in the gyre by variable winter convection penetrating only to mid-depths, reaching at most 1800 m depth during the strongest event observed in 2002. For the first 18 months, the tracer remained mainly in the Greenland Sea. Vigorous horizontal mixing within the Greenland Sea gyre and a tight circulation of the gyre interacting slowly with the other basins under strong topographic influences were identified. We use the tracer distributions to derive the horizontal shear at the scale of the Greenland Sea gyre, and rates of horizontal mixing at 10 and 300 km scales. Mixing rates at small scale are high, several times those observed at comparable depths at lower latitudes. Horizontal stirring at the sub-gyre scale is mediated by numerous and vigorous eddies. Evidence obtained during the tracer release suggests that these play an important role in mixing water masses to form the intermediate waters of the central Greenland Sea. By year two, the tracer had entered the surrounding current systems at intermediate depths and small concentrations were in proximity to the overflows into the North Atlantic. After 3 years, the tracer had spread over the Nordic Seas basins. Finally by year six, an intensive large survey provided an overall synoptic documentation of the spreading of the tagged GSAIW in the Nordic Seas. A circulation scheme of the tagged water originating from the centre of the GS is deduced from the horizontal spread of the tracer. We present this circulation and evaluate the transport budgets of the tracer between the GS and the surroundings basins. The overall residence time for the tagged GSAIW in the Greenland Sea was about 2.5 years. We infer an export of intermediate water of GSAIW from the GS of 1 to 1.85 Sv (1 Sv = 106 m3 s−1) for the period from September 1998 to June 2002 based on the evolution of the amount of tracer leaving the GS gyre. There is strong exchange between the Greenland Sea and Arctic Ocean via Fram Strait, but the contribution of the Greenland Sea to the Denmark Strait and Iceland Scotland overflows is modest, probably not exceeding 6% during the period under study.
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| 4. |
- Laamanen, R, et al.
(författare)
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Client perceptions of the performance of public and independent not-for-profit primary healthcare
- 2006
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Ingår i: Scandinavian journal of public health. - : SAGE Publications. - 1403-4948 .- 1651-1905. ; 34:6, s. 598-608
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Tidskriftsartikel (refereegranskat)abstract
- Aims: To compare primary healthcare (PHC) provided by an independent not-for-profit organization (INPO) with that provided by two public municipal organizations (MO1 and MO2), in terms of clients' perceptions of performance, acceptance, and trust. Methods: A survey using a pre-tested questionnaire to all clients visiting a health centre (HC) doctor or nurse during one week in 2000 (n=511, 51% response rate) and 2002 (n=275, 47%). The data were analysed by descriptive statistics and cumulative logistic regression analysis. Results: The INPO differed from both publicly provided services in accessibility, consistency of service, and outcomes. Clients reported lower trust in HC provided by public organizations compared with the INPO. Trust was higher if clients also reported experiencing ``very good'' or ``moderate'' organizational access — or if general satisfaction was ``very high'' or ``moderate'' or if they experienced outcomes as ``very good'' or ``moderate'' compared with the ``very poor or low'' situation. Women reported lower trust in HC than men. When the family doctor was included in the same logistic regression model with the service provider, only the family doctor was a significant explanatory variable. Reported acceptance of private alternative service providers among clients was similar between the study organizations. Conclusions: Clients of the INPO generally rated the service more positively than clients of publicly provided services. The results indicate that trust in HC depends more on a family doctor system than a service provider.
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| 5. |
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| 6. |
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| 7. |
- Simonsen, A H, et al.
(författare)
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Amyloid beta1-40 quantification in CSF: comparison between chromatographic and immunochemical methods.
- 2007
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Ingår i: Dementia and geriatric cognitive disorders. - : S. Karger AG. - 1420-8008 .- 1421-9824. ; 23:4, s. 246-50
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND/AIMS: Amyloid beta (Abeta) is the principal component of senile plaques, one of the hallmarks of Alzheimer's disease (AD). Evidence is accumulating that soluble aggregates (oligomers) of Abeta are important in the pathogenesis of AD. METHODS: We compared three different methods for quantification of the 40 amino acid form of Abeta (Abeta40) in CSF, two based on antibodies [ELISA and surface-enhanced laser desorption/ionization-time of flight (SELDI-TOF) with antibody-coated arrays] and one based on direct binding of proteins to a protein array [SELDI-TOF and immobilized metal affinity [copper] (IMAC30)]. RESULTS: CSF Abeta40 concentration was only found to be significantly elevated in AD (127% of control levels; p=0.0095) using SELDI-TOF with IMAC30 arrays. CONCLUSIONS: These data suggest that the measured Abeta level in CSF may differ depending on whether antibody-based methods are used or not, possibly caused by epitope masking due to Abeta oligomerization or to binding of Abeta to carrier proteins.
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| 8. |
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| 9. |
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| 10. |
- Simonsen-Rehn, N, et al.
(författare)
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Determinants of health promotion action in primary health care: comparative study of health and home care personnel in four municipalities in Finland
- 2009
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Ingår i: Scandinavian journal of public health. - : SAGE Publications. - 1403-4948 .- 1651-1905. ; 37:1, s. 4-12
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Tidskriftsartikel (refereegranskat)abstract
- Aims: The purpose of this paper is to contribute to understanding which factors influence health promotion action in primary health care (PHC) on the municipal, i.e. local, level. Methods: A cross-sectional mail survey of all PHC personnel in four municipalities in Finland in 2002. The data were analysed by descriptive statistics, and univariate and multivariate logistic regression analyses. Results: A total of 417 (response rate 57%) healthcare professionals participated in the study; 65% of the personnel working in ambulatory care, 52% working in home care and 44% working in inpatient care were engaged in health promotion action (=higher than median engagement). Factors independently associated with engagement in health promotion were organizational values, reflected in perceived skill discretion and social support from coworkers, and the personnel's competence, reflected in knowledge about the health and living conditions of the population served. Further, the opportunities, reflected in cooperation with partners outside the organization were strongly associated with engagement in health promotion action. Conclusions: The results suggest that working conditions such as possibilities for skill usage, reflection and development as well as collegial support enable higher engagement in health promotion action in PHC. However, access to data on the local population's health and living conditions, in addition to opportunities to cooperate with decision makers and partners in the community turned out to be as important. This should be taken into consideration when striving to reorient health services to health promotion.
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| 11. |
- Trobos, Margarita, 1980, et al.
(författare)
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Characterization of sulphonamide-resistant Escherichia coli using comparison of sul2 gene sequences and multilocus sequence typing.
- 2009
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Ingår i: Microbiology (Reading, England). - : Microbiology Society. - 1350-0872 .- 1465-2080. ; 155:Pt 3, s. 831-836
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Tidskriftsartikel (refereegranskat)abstract
- The sul2 gene encodes sulphonamide resistance (Sul(R)) and is commonly found in Escherichia coli from different hosts. We typed E. coli isolates by multilocus sequence typing (MLST) and compared the results to sequence variation of sul2, in order to investigate the relation to host origin of pathogenic and commensal E. coli strains and to investigate whether transfer of sul2 into different genomic lineages has happened multiple times. Sixty-eight E. coli isolated in Denmark and Norway from different hosts and years were MLST typed and sul2 PCR products were sequenced and compared. PFGE was performed in a subset of isolates. All isolates were divided into 45 different sequence types (STs), with clonal complexes CC10, CC23, CC168, CC350 and CC69 being the most frequent. The sul2 gene from the majority of E. coli strains had only two point mutations, at positions 159 and 197, leading to a synonymous and a non-synonymous change, respectively. Five strains had extra single mutations. All poultry, poultry meat, and Danish human blood isolates had the same sul2 ST and some of these strains clustered under the same MLST STs, indicating that they shared habitats. Most PFGE profiles clustered according to source, but some included different sources. Sul(R) E. coli from different animals, food, human faeces and infections did not cluster according to their origin, suggesting that these habitats share E. coli and sul2 gene types. However, while pig isolates on one occasion clustered with urinary tract infection isolates, poultry isolates seemed more related to isolates from bloodstream infections in humans. Presence of mainly two types of the sul2 gene in both human and animal isolates, irrespective of date and geography, and the presence of both types in the same clonal lineages, suggest horizontal transfer of sul2.
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