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Rieck B Tourigny DS Crosatti M Schmid R Kochar M Harrison EM Ou HY Turton JF Rajakumar K 《Applied and environmental microbiology》2012,78(2):471-480
Experimental and in silico PCR analysis targeting ISAba11 and TnAbaR islands in 196 epidemiologically unrelated Acinetobacter strains representative of ≥19 species were performed. The first two Acinetobacter baumannii ISAba11 elements identified had been found to map to the same site on TnAbaR transposons. However, no further evidence of physical linkage between the two elements was demonstrated. Indeed, examination of 25 definite or putative insertion sites suggested limited sequence specificity. Importantly, an aacC1-tagged version of ISAba11 was shown to actively transpose in A. baumannii. Similarity searches identified nine iso-ISAba11 elements in Acinetobacter and one in Enhydrobacter and single representatives of four distant homologs in bacteria belonging to the phyla "Cyanobacteria" and Proteobacteria. Phylogenetic, sequence, and structural analyses of ISAba11 and/or its associated transposase (Tnp(ISAba11)) suggested that these elements be assigned to a new family. All five homologs encode transposases with a shared extended signature comprising 16 invariant residues within the N2, N3, and C1 regions, four of which constituted the cardinal ISAba11 family HHEK motif that is substituted for the YREK DNA binding motif conserved in the IS4 family. Additionally, ISAba11 family members were associated with either no flanking direct repeat (DR) or an ISAba11-typical 5-bp DR and possessed variable-length terminal inverted repeats that exhibited extensive intrafamily sequence identity. Given the limited pairwise identity among Tnp(ISAba11) homologs and the observed restricted distribution of ISAba11, we propose that substantial gaps persist in the evolutionary record of ISAba11 and that this element represents a recent though potentially highly significant entrant into the A. baumannii gene pool. 相似文献
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Smyth R Lane CS Ashiq R Turton JA Clarke CJ Dare TO York MJ Griffiths W Munday MR 《Cell biology and toxicology》2009,25(5):499-512
Proteomic techniques such as two-dimensional gel electrophoresis (2-DGE) and mass spectrometry have become important tools
for the identification of novel biomarkers of toxicity and disease. Ideally, such biomarkers need to be sensitive and organ
specific, but, recently, it has become apparent that it would be an additional benefit to be able to measure biomarkers in
samples obtained using non-invasive methods. The present study is concerned with the identification of novel urinary markers
of hepatic fibrosis. In a carbon-tetrachloride-induced liver fibrosis rat model, analysis of urine by 2-DGE revealed an increase
in the concentration of a number of proteins in animals with hepatic fibrosis. Using in-gel trypsin digest and nano-scale
liquid chromatography combined with electrospray ionisation tandem mass spectrometry, protein spots were identified as copper/zinc
superoxide dismutase, d-dopachrome tautomerase, beta-2-microglobulin and neutrophil gelatinase associated lipocalin. These proteins are known to
have important roles in the inflammatory response. 相似文献
36.
Brudin L. H.; Valind S. O.; Rhodes C. G.; Turton D. R.; Hughes J. M. 《Journal of applied physiology》1986,60(4):1155-1163
Regional lung hematocrit ratio (R) was measured in five normal subjects and five patients (2 with pneumonia, 2 with nephrotic syndrome with anemia, and 1 with pancreatitis) using positron emission tomography, a red cell marker 11CO, and a plasma marker [methyl-11C]albumin). The measurements were made in a transaxial thoracic section at midheart level with the subject in supine posture and with a spatial resolution of 1.7 cm. The normal regional hematocrit ratio (means +/- SE) calculated for the lung was 0.90 +/- 0.014, 0.94 +/- 0.023 for the thoracic wall, and 1.00 +/- 0.003 for the heart chambers. The regional lung hematocrit ratio in the patients ranged between 0.81 and 0.86. No correlation was found among the regional lung hematocrit ratio and regional blood volume, lung extravascular density, and the peripheral hematocrit (obtained from venous blood samples). To the extent that 70% of the pulmonary blood in the field of view is in larger vessels with normal hematocrit, the hematocrit in the capillary bed is approximately two-thirds that of the peripheral venous value. Blood volume measurements on the basis of single vascular tracers need to take account of these results. 相似文献
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L.J. Turton D.B. Drucker V.F. Hillier L.A. Ganguli 《Journal of applied microbiology》1983,54(2):295-304
A study was made of the influence of eight growth media upon the fermentation end-product patterns obtained with ten species of anaerobes. Acidic and neutral end-products of fermentation were analysed by gas chromatography and the results were examined statistically by computer. Differences in end-product profile were at least as great between different media used to grow a single anaerobic species, as between different anaerobes grown in a single type of medium. When individual fermentation end-products produced by a single anaerobe species were examined, statistically significant differences were found between different media for individual end-products. It is concluded that standardisation of growth medium is essential in diagnostic laboratories concerned with identification of anaerobes with the aid of gas chromatography. 相似文献
39.
Perceptions of oral health among older Cambodians and their caregivers: A qualitative study
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Rithvitou Horn Chanlay Heng Chamrouen Chea Chanthyda Sieng Chenlay Louv Bathsheba Turton Callum Durward Noor Hayaty Abu Kasim 《Gerodontology》2018,35(1):45-50
Objective
Older adults (those above the age of 60) are an emerging demographic in Cambodia, and very little is understood about their oral health experiences, needs, perceptions and behaviours. The aim of this study was to explore the oral health experiences, practices and perceptions of a convenience sample of a small but diverse group of older adults in Cambodia.Method
A cross‐sectional qualitative study in which focus group interviews were conducted by 5 trained senior Cambodian dental students. A convenience sample of 56 older adults and caregivers was recruited across urban, semi‐urban and rural locations. Focus group conversations were recorded, transcribed and analysed thematically.Results
The themes that emerged were around low expectations for both general health and oral health. A communal responsibility for health was expressed, and both money and transport were identified as key barriers to accessing care. Participants recognised that they had oral health problems, and acknowledged the impact of poor oral function on health and nutrition.Conclusion
This study is an important first step in better understanding the oral health experiences and perceptions of older people in Cambodia. Participants described the impacts of poor oral health as being important, even when compared with other general health conditions. 相似文献40.