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  • × 急救医学
  • × 2020
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PLoS One,2020年

Brianna C. Delker, Rowan Salton, Kate C. McLean, Moin Syed

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Although survivors of sexual violence have shared their stories with the public on social media and mass media platforms in growing numbers, less is known about how general audiences perceive such trauma stories. These perceptions can have profound consequences for survivor mental health. In the present experimental, vignette-based studies, we anticipated that cultural stigma surrounding sexual violence and cultural preference for positive (redemptive) endings to adversity in the United States (U.S.) would shape perceptions. Four samples of U.S. adults ( N = 1872) rated first-person narratives of 6 more stigmatizing (i.e., sexual violence) or less stigmatizing (e.g., natural disaster) traumatic events. Confirming pre-registered hypotheses, sexual violence trauma (versus other types of trauma) stories were perceived as more difficult to tell, and their storytellers less likeable, even when they had redemptive endings. Disconfirming other pre-registered hypotheses, redemptive (versus negative) story endings did not boost the perceived likelihood or obligation to share a sexual violence trauma story. Rather, redemptive (versus negative) story endings only boosted the perceived likelihood, obligation, and ease of telling other, less stigmatizing types of trauma stories. Findings suggest that sexual violence survivors do not benefit, to the same degree as other survivors, from telling their stories with the culturally valued narrative template of redemption. Clinical and societal implications of the less receptive climate for sexual violence stories are discussed.

    PLoS One,2020年

    Wun-Chung Szeto, Ho-Pan Hsia, Yun-Sang Tang, Pang-Chui Shaw

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    Influenza A virus controls replication and transcription of its genome through the tight regulation of interaction between the ribonucleoprotein (RNP) complex subunits. The helical scaffold of RNP is maintained by nucleoprotein (NP). Previous studies have revealed that NP interacts with both PB2 N-terminal and C-terminal regions, with both regions sharing similar affinity to NP as revealed in co-immunoprecipitation assay. Our work here suggests that the interaction between NP and PB2 N-terminal region lies in the cap-binding domain (residue 320–483). By co-immunoprecipitation assay, the interaction was found to involve RNA. On the other hand, the cap-binding activity was not essential in the interaction. As shown by the NHS pull-down assay, a specific RNA sequence was not required. Among the cap-binding domain, residues K331 and R332 of PB2 play a role in RNP function so that polymerase activity was reduced when these residues were mutated, while K331 was found to be more crucial in the NP interaction. Collectively, our findings suggest a new binding mode between NP and PB2 which was mediated by RNA, and such interaction may provide a novel interacting site for influenza drug development.

      PLoS One,2020年

      Thomas Scherngell, Charlotte Rohde, Martina Neuländtner

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      The purpose of this study is to identify and characterize the structure and dynamics of global R&D collaboration networks in ICT by analyzing cross-country co-patents, with a special focus on the role of China. We employ a Social Network Analysis (SNA) perspective, using information on more than 77 thousand co-patents from 2001–2015. These co-patents are disaggregated by three time periods and four ICT subsectors. Global measures for the network as a whole, as well as local measures on the positioning of countries in the networks are interpreted. The empirical results are highly interesting. First, international R&D collaboration networks in ICT show a dynamic transformation in becoming larger in magnitude (more countries but also more inter-linkages), less centralized and more densely connected, though with varying degrees across ICT subsectors. Second, the powerful position of the US weakens relatively compared to other, increasingly connected countries, in particular China. While China has already surpassed the US in total patenting in ICT in 2015, China is now also catching up from a network perspective shown by its growing central position over the observed time period.

        PLoS One,2020年

        Lorena Maestre, Juan Fernando García-García, Scherezade Jiménez, Ana Isabel Reyes-García, Álvaro García-González, Santiago Montes-Moreno, Alberto J. Arribas, Patricia González-García, Eduardo Caleiras, Alison H. Banham, Miguel Ángel Piris, Giovanna Roncador

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        Thymocyte selection-associated high-mobility group box (TOX) is a DNA-binding factor that is able to regulate transcription by modifying local chromatin structure and modulating the formation of multi-protein complexes. TOX has multiple roles in the development of the adaptive immune system including development of CD4 T cells, NK cells and lymph node organogenesis. However very few antibodies recognizing this molecule have been reported and no extensive study of the expression of TOX in reactive and neoplastic lymphoid tissue has been performed to date. In the present study, we have investigated TOX expression in normal and neoplastic lymphoid tissues using a novel rat monoclonal antibody that recognizes its target molecule in paraffin-embedded tissue sections. A large series of normal tissues and B- and T-cell lymphomas was studied, using whole sections and tissue microarrays. We found that the majority of precursor B/T lymphoblastic, follicular and diffuse large B-cell lymphomas, nodular lymphocyte-predominant Hodgkin lymphomas and angioimmunoblastic T-cell lymphomas strongly expressed the TOX protein. Burkitt and mantle cell lymphomas showed TOX expression in a small percentage of cases. TOX was not found in the majority of chronic lymphocytic leukemia, myelomas, marginal zone lymphomas and classical Hodgkin lymphomas. In conclusion, we describe for the first time the expression of TOX in normal and neoplastic lymphoid tissues. The co-expression of TOX and PD-1 identified in normal and neoplastic T cells is consistent with recent studies identifying TOX as a critical regulator of T-cell exhaustion and a potential immunotherapy target. Its differential expression may be of diagnostic relevance in the differential diagnosis of follicular lymphoma, the identification of the phenotype of diffuse large B-cell lymphoma and the recognition of peripheral T-cell lymphoma with a follicular helper T phenotype.

          PLoS One,2020年

          Geng Tian, Guoqing Li, Yanling Liu, Qinghua Liu, Yanxia Wang, Guangmin Xia, Mengcheng Wang

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          Synonymous codon usage bias (SCUB) of both nuclear and organellar genes can mirror the evolutionary specialization of plants. The polyploidization process exposes the nucleus to genomic shock, a syndrome which promotes, among other genetic variants, SCUB. Its effect on organellar genes has not, however, been widely addressed. The present analysis targeted the chloroplast genomes of two leading polyploid crop species, namely cotton and bread wheat. The frequency of codons in the chloroplast genomes ending in either adenosine (NNA) or thymine (NNT) proved to be higher than those ending in either guanidine or cytosine (NNG or NNC), and this difference was conserved when comparisons were made between polyploid and diploid forms in both the cotton and wheat taxa. Preference for NNA/T codons was heterogeneous among genes with various numbers of introns and was also differential among the exons. SCUB patterns distinguished tetraploid cotton from its diploid progenitor species, as well as bread wheat from its diploid/tetraploid progenitor species, indicating that SCUB in the chloroplast genome partially mirrors the formation of polyploidies.

            PLoS One,2020年

            Raymond Yeung, Xiaobo Zhu, Terence Gee, Ben Gheen, David Jassby, Victor G. J. Rodgers

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            Electrically conductive composite ultrafiltration membranes composed of carbon nanotubes have exhibited efficient fouling inhibition in wastewater treatment applications. In the current study, poly(vinyl-alcohol)-carbon nanotube membranes were applied to fed batch crossflow electroultrafiltration of dilute (0.1 g/L of each species) single and binary protein solutions of α-lactalbumin and hen egg-white lysozyme at pH 7.4, 4 mM ionic strength, and 1 psi. Electroultrafiltration using the poly(vinyl-alcohol)-carbon nanotube composite membranes yielded temporary enhancements in sieving for single protein filtration and in selectivity for binary protein separation compared to ultrafiltration using the unmodified PS-35 membranes. Assessment of membrane fouling based on permeate flux, zeta potential measurements, and scanning electron microscopy visualization of the conditioned membranes indicated significant resulting protein adsorption and aggregation which limited the duration of improvement during electroultrafiltration with an applied cathodic potential of -4.6 V (vs. Ag/AgCl). These results imply that appropriate optimization of electroultrafiltration using carbon nanotube-deposited polymeric membranes may provide substantial short-term improvements in binary protein separations.