41 research outputs found
Animal models for COVID-19
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is the aetiological agent of coronavirus disease 2019 (COVID-19), an emerging respiratory infection caused by the introduction of a novel coronavirus into humans late in 2019 (first detected in Hubei province, China). As of 18 September 2020, SARS-CoV-2 has spread to 215 countries, has infected more than 30 million people and has caused more than 950,000 deaths. As humans do not have pre-existing immunity to SARS-CoV-2, there is an urgent need to develop therapeutic agents and vaccines to mitigate the current pandemic and to prevent the re-emergence of COVID-19. In February 2020, the World Health Organization (WHO) assembled an international panel to develop animal models for COVID-19 to accelerate the testing of vaccines and therapeutic agents. Here we summarize the findings to date and provides relevant information for preclinical testing of vaccine candidates and therapeutic agents for COVID-19
Search for Neutrinoless Double- β Decay with the Complete EXO-200 Dataset
A search for neutrinoless double-β decay (0νββ) in Xe136 is performed with the full EXO-200 dataset using a deep neural network to discriminate between 0νββ and background events. Relative to previous analyses, the signal detection efficiency has been raised from 80.8% to 96.4±3.0%, and the energy resolution of the detector at the Q value of Xe136 0νββ has been improved from σ/E=1.23% to 1.15±0.02% with the upgraded detector. Accounting for the new data, the median 90% confidence level 0νββ half-life sensitivity for this analysis is 5.0×1025 yr with a total Xe136 exposure of 234.1 kg yr. No statistically significant evidence for 0νββ is observed, leading to a lower limit on the 0νββ half-life of 3.5×1025 yr at the 90% confidence level
'It is fun, fitness and football really': a process evaluation of a football-based health intervention for men
Concerns about gender inequalities in longevity, particularly premature male mortality, have prompted a range of innovative approaches to health promotion work dating back to the 1980s. In developing such work, sport, and football in particular, has emerged as a gendered cultural field that has utility for engaging men in community health initiatives. Evaluations of such work have shown that health initiatives using football settings, football interventions or even club branding can have positive impact on various health measures in the short and longer term. However, little work to date has looked at the underlying mechanisms that generate success in such projects. This paper presents secondary analysis of data collected during the evaluation of the Premier League Health (PLH) programme specifically focusing on these underlying mechanisms and how/where gender (masculinities) appears in these processes. We draw on interview data with 16 staff who had been involved in the delivery of the PLH initiative and 58 men who took part. Thematic analysis highlighted two overarching (and underpinning) themes: 'Trust', what processes it was key to and how it was developed and sustained; and 'Change', including what it was facilitated by and what impact it had. The paper adds to our understanding of how active listening, flexibility and sustained engagement are key to community-based sports projects' success. Furthermore, it demonstrates how the physicality and sociability of involvement, rather than any direct focus on 'health', are important in acting as a springboard for facilitating reflection and aiding lifestyle changes for men. © 2013 Taylor & Francis
Development and characterization of a chimaeric tissue-specific promoter in wheat and rice endosperm
The recently achieved significant improvement of cereal transformation
protocols provides facilities to alter the protein composition of the
endosperm, for example, to increase or decrease the quantity of one of
its protein components or to express foreign molecules. To achieve this
goal, strong endosperm-specific promoters have to be available. The aim
of our work was to develop a more efficient tissue-specific promoter
which is currently used. A chimaeric promoter was assembled using the
5' UTR (1,900 bp) of the gene coding for the 1Bx17 HMW glutenin subunit
protein, responsible for tissue-specific expression and the first
intron of the rice actin gene (act1). The sequence around of the
translation initial codon was optimized. The effect of the intron and
promoter regulatory sequences, using different lengths of 1Bx17 HMW-GS
promoter, were studied on the expression of uidA gene. The function of
promoter elements, promoter length, and the first intron of the rice
actin gene were tested by a transient expression assay in immature
wheat endosperm and in stable transgenic rice plants. Results showed
that insertion of the rice act1 first intron increased GUS expression
by four times in transient assay. The shortest 1Bx17 HMW-GS promoter
fragment (173 bp) linked to the intron and GUS reporter gene provided
almost the same expression level than the intronless long 1Bx17 HMW-GS
promoter. Analysis of the stable transformant plants revealed that 173
nucleotides were sufficient for endosperm-specific expression of the
uidA gene, despite 13 nucleotides missing from the HMW enhancer
sequence, a relevant regulatory element in the promoter region