721 research outputs found
Utilizing a New Graphical Elicitation Technique to Collect Emotional Narratives Describing Disease Trajectories
Elicitation techniques in connection with semi-structured interviews are scantily used, but reported to be beneficial to research. We developed and tested a new visual technique to be utilized in the latter part of semi-structured interviews. It has proved to be feasible and beneficial to use, and it could possibly be used by others. This way of extending the interviews generates more data in a visual form, as well as in a verbal form, by supporting the participants in remembering nearly forgotten parts of their experiences and in expressing emotions associated with those significant experiences. As a contribution to qualitative research, our study showed that the visual data, created by the participants, also contributed to getting the elaborated narratives
Scalability and feasibility of photoelectrochemical H<sub>2</sub> evolution: the ultimate limit of Pt nanoparticle as an HER catalyst
Regulation of root traits for internal aeration and tolerance to soil waterlogging-flooding stress
Polygenic risk score, parental socioeconomic status, family history of psychiatric disorders, and the risk for schizophrenia: a Danish population-based study and meta-analysis
IMPORTANCE Schizophrenia has a complex etiology influenced both by genetic and nongenetic factors but disentangling these factors is difficult. OBJECTIVE To estimate (1) how strongly the risk for schizophrenia relates to the mutual effect of the polygenic risk score, parental socioeconomic status, and family history of psychiatric disorders; (2) the fraction of cases that could be prevented if no one was exposed to these factors; (3) whether family background interacts with an individual's genetic liability so that specific subgroups are particularly risk prone; and (4) to what extent a proband's genetic makeup mediates the risk associated with familial background. DESIGN, SETTINGS, AND PARTICIPANTS We conducted a nested case-control study based onDanish population-based registers. The study consisted of 866 patients diagnosed as having schizophrenia between January 1, 1994, and December 31, 2006, and 871 matched control individuals. Genome-wide data and family psychiatric and socioeconomic background information were obtained from neonatal biobanks and national registers. Results from a separate meta-analysis (34 600 cases and 45 968 control individuals) were applied to calculate polygenic risk scores. EXPOSURES Polygenic risk scores, parental socioeconomic status, and family psychiatric history. MAIN OUTCOMES AND MEASURES Odds ratios (ORs), attributable risks, liability R2 values, and proportions mediated. RESULTS Schizophrenia was associated with the polygenic risk score (OR, 8.01; 95%CI, 4.53-14.16 for highest vs lowest decile), socioeconomic status (OR, 8.10; 95%CI, 3.24-20.3 for 6 vs no exposures), and a history of schizophrenia/psychoses (OR, 4.18; 95%CI, 2.57-6.79). The R2 values were 3.4%(95%CI, 2.1-4.6) for the polygenic risk score, 3.1%(95%CI, 1.9-4.3) for parental socioeconomic status, and 3.4%(95%CI, 2.1-4.6) for family history. Socioeconomic status and psychiatric history accounted for 45.8% (95%CI, 36.1-55.5) and 25.8% (95%CI, 21.2-30.5) of cases, respectively. There was an interaction between the polygenic risk score and family history (P = .03). A total of 17.4%(95%CI, 9.1-26.6) of the effect associated with family history of schizophrenia/psychoses was mediated through the polygenic risk score. CONCLUSIONS AND RELEVANCE Schizophrenia was associated with the polygenic risk score, family psychiatric history, and socioeconomic status. Our study demonstrated that family history of schizophrenia/psychoses is partly mediated through the individual's genetic liability
Community recommendations on terminology and procedures used in flooding and low oxygen stress research
Apart from playing a key role in important biochemical reactions, molecular oxygen (O2) and its by-products also have crucial signaling roles in shaping plant developmental programs and environmental responses. Even under normal conditions, sharp O2 gradients can occur within the plant when cellular O2 demand exceeds supply, especially in dense organs such as tubers, seeds and fruits. Spatial and temporal variations in O2 concentrations are important cues for plants to modulate development (van Dongen & Licausi, 2015; Considine et al., 2016). Environmental conditions can also expand the low O2 regions within the plant. For example, excessive rainfall can lead to partial or complete plant submergence resulting in O2 deficiency in the root or the entire plant (Voesenek & Bailey-Serres, 2015). Climate change-associated increases in precipitation events have made flooding a major abiotic stress threatening crop production and food sustainability. This increased flooding and associated crop losses highlight the urgency of understanding plant flooding responses and tolerance mechanisms.
Timely manifestation of physiological and morphological changes triggering developmental adjustments or flooding survival strategies requires accurate sensing of O2 levels. Despite progress in understanding how plants sense and respond to changes in intracellular O2 concentrations (van Dongen & Licausi, 2015), several questions remain unanswered due to a lack of high resolution tools to accurately and noninvasively monitor (sub)cellular O2 concentrations. In the absence of such tools, it is therefore critical for researchers in the field to be aware of how experimental conditions can influence plant O2 levels, and thus on the importance of accurately reporting specific experimental details. This also requires a consensus on the definition of frequently used terms.
At the 15th New Phytologist Workshop on Flooding stress (Voesenek et al., 2016), community members discussed and agreed on unified nomenclature and standard norms for low O2 and flooding stress research. This consensus on terminology and experimental guidelines is presented here. We expect that these norms will facilitate more effective interpretation, comparison and reproducibility of research in this field. We also highlight the current challenges in noninvasively monitoring and measuring O2 concentrations in plant cells, outlining the technologies currently available, their strengths and drawbacks, and their suitability for use in flooding and low O2 research
Gas film retention and underwater photosynthesis during field submergence of four contrasting rice genotypes
Floods can completely submerge some rice (Oryza sativa L.) fields. Leaves of rice have gas films that aid O(2) and CO(2) exchange under water. The present study explored the relationship between gas film persistence and underwater net photosynthesis (P(N)) as influenced by genotype and submergence duration. Four contrasting genotypes (FR13A, IR42, Swarna, and Swarna-Sub1) were submerged for 13 days in the field and leaf gas films, chlorophyll, and the capacity for underwater P(N) at near ambient and high CO(2) were assessed with time of submergence. At high CO(2) during the P(N) assay, all genotypes initially showed high rates of underwater P(N), and this rate was not affected by time of submergence in FR13A. This superior photosynthetic performance of FR13A was not evident in Swarna-Sub1 (carrying the SUB1 QTL) and the declines in underwater P(N) in both Swarna-Sub1 and Swarna were equal to that in IR42. At near ambient CO(2) concentration, underwater P(N) declined in all four genotypes and this corresponded with loss of leaf gas films with time of submergence. FR13A retained leaf gas films moderately longer than the other genotypes, but gas film retention was not linked to SUB1. Diverse rice germplasm should be screened for gas film persistence during submergence, as this trait could potentially increase carbohydrate status and internal aeration owing to increased underwater P(N), which contributes to submergence tolerance in rice
Benefits and challenges perceived by patients with cancer when offered a nurse navigator
<p class="MsoNormal" style="line-height: 200%; margin: 0cm 0cm 10pt;"><span style="font-size: small;"><strong style="mso-bidi-font-weight: normal;"><span style="font-family: " lang="EN-US">Introduction: </span></strong><span style="font-family: " lang="EN-US">Lack of communication, care and respect from healthcare professionals can be challenges for patients in trajectories of cancer, possibly accompanied by experienced fragmentation of the care, anxiety and worries. One way to try to improve delivery of care is additional help from Nurse Navigators (NN) offered in a predefined shorter or longer period, but patients´ experiences with this have seldom been investigated.</span></span></p><p class="MsoNormal" style="line-height: 200%; margin: 0cm 0cm 10pt;"><span style="font-size: small;"><strong style="mso-bidi-font-weight: normal;"><span style="font-family: " lang="EN-US">Aims: </span></strong><span style="font-family: " lang="EN-US">To explore patients´ experiences of an NN offered in a short period of a longer trajectory of cancer. </span></span></p><p class="MsoNormal" style="line-height: 200%; margin: 0cm 0cm 10pt;"><span style="font-size: small;"><strong style="mso-bidi-font-weight: normal;"><span style="font-family: " lang="EN-US">Methods: </span></strong><span style="font-family: " lang="EN-US">NN worked from the hospital side in the transition between primary care and a university hospital before admission. A phenomenological-hermeneutical longitudinal study was performed from referral and until two months after discharge from the hospital. Semi-structured interviews provided data for the analysis, which started open-minded.</span></span></p><p class="MsoNormal" style="line-height: 200%; margin: 0cm 0cm 10pt;"><span style="font-size: small;"><strong style="mso-bidi-font-weight: normal;"><span style="font-family: " lang="EN-US">Results: </span></strong><span style="font-family: " lang="EN-US"><span style="mso-spacerun: yes;"> </span>Affectional bonds were made to NN and patients felt that they benefited from her presence and her help,<strong style="mso-bidi-font-weight: normal;"> </strong>which they requested until one month after discharge. They were deeply disappointed and felt rejected when the contact to the NN stopped. </span></span></p><p class="MsoNormal" style="line-height: 200%; margin: 0cm 0cm 10pt;"><span style="font-size: small;"><strong style="mso-bidi-font-weight: normal;"><span style="font-family: " lang="EN-US">Conclusion:</span></strong><span style="font-family: " lang="EN-US"> In efforts to increase quality of care for patients with cancer we recommend paying special attention to critical periods in their trajectories, as well as to the theory of attachment to supplement thoughts of continuity of care and coordination in the care for women. In short, it is fine to offer additional help to those who can use it, but in practice as well as in research we call attention to awareness on how and when to stop the help, to prevent patients from feeling hurt.</span></span></p
Benchmarking the HLA typing performance of Polysolver and Optitype in 50 Danish parental trios
YAP/TAZ-Dependent Reprogramming of Colonic Epithelium Links ECM Remodeling to Tissue Regeneration.
Tissue regeneration requires dynamic cellular adaptation to the wound environment. It is currently unclear how this is orchestrated at the cellular level and how cell fate is affected by severe tissue damage. Here we dissect cell fate transitions during colonic regeneration in a mouse dextran sulfate sodium (DSS) colitis model, and we demonstrate that the epithelium is transiently reprogrammed into a primitive state. This is characterized by de novo expression of fetal markers as well as suppression of markers for adult stem and differentiated cells. The fate change is orchestrated by remodeling the extracellular matrix (ECM), increased FAK/Src signaling, and ultimately YAP/TAZ activation. In a defined cell culture system recapitulating the extracellular matrix remodeling observed in vivo, we show that a collagen 3D matrix supplemented with Wnt ligands is sufficient to sustain endogenous YAP/TAZ and induce conversion of cell fate. This provides a simple model for tissue regeneration, implicating cellular reprogramming as an essential element.This work was supported by Worldwide Cancer Research (13-1216 to KBJ), Lundbeck Foundation (R105-A9755 to KBJ), the Danish Cancer Society (R56-A2907 and R124-A7724 to KBJ), the Carlsberg Foundation (to KBJ), EMBO Young Investigator programme (to KBJ), AIRC Special Program Molecular Clinical Oncology ‘‘5 per mille’’ (to SP), an AIRC PI-Grant (to SP), Epigenetics Flagship projects (CNR-Miur grants. to SP), the DFF mobilix programme (to SY), Marie Curie fellowship programme (SY and JG), Foundation of Aase and Ejnar Danielsen (OHN), Axel Muusfeldts Foundation (OHN), The Ragnar Söderberg Foundation (CDM). This
project has received funding from the European Union’s Horizon 2020 research and innovation programme (grant agreements STEMHEALTH ERCCoG682665 and INTENS 668294 to KBJ and DENOVOSTEM No. 670126 to SP)
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