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1.
  • Aardal-Eriksson, Elisabeth, et al. (författare)
  • Pre-trauma Salivary Cortisol Levels and General Health Ratings in Relation to Post-trauma Changes in Cortisol and Psychological Distress after UN-service in Bosnia
  • Annan publikation (övrigt vetenskapligt/konstnärligt)abstract
    • Background: The psychobiology of post-traumatic distress is known to some extent, however the pre-trauma psychobiology is not. The aims of the present study were to relate pre- and post-trauma salivary cortisol levels and general health to post-traumatic distress in a Swedish UN-battalion in Bosnia.Methods: Salivary 8 AM and I 0 PM cortisol levels and "General Health Questionnaire" ratings were collected from 145 subjects before the six months' mission, at return and two and six months after mission. During follow-up, the ratings were extended by the "Impact of Events Scale" (IES) and "Post Traumatic Symptom Scale".Results: Low pre-trauma morning and evening salivary cortisol levels were statistically significantly related to high scores in all rating scales six months after mission and to increasing IES scores during follow-up. Low morning and high evening post-trauma salivary cortisol levels were related to high ratings of psychological distress six months after missionConclusions: Pre-trauma salivary cortisol levels seem to be related to posttrauma psychological distress, however not to the extent that salivary cortisol levels in a simple way could be used for predictive screening.
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  • Aardal-Eriksson, Elisabeth, et al. (författare)
  • Twelve Months Follow-up of Salivary Cortisol in Relation to Psychological Distress and General Health in Swedish UN-personnel after Severe Combat Exposure during Six Months Mission in Bosnia
  • Annan publikation (övrigt vetenskapligt/konstnärligt)abstract
    • Background: Our group has presented evidence of relationships between salivary cortisol levels and psychological distress before, during and after trauma-related stress. The aim of the present study was to confirm the part of evidence of relationships between salivary cortisol and posttraumatic distress and their change over time.Methods: Salivary cortisol levels at 8 AM and 10 PM and self-ratings were collected from 106 subjects six and twelve months after a six months UNmission in Bosnia. The rating instruments were the "Impact of Event Scale" (IES), the "Post Traumatic Symptom Scale" and the "General Health Questionnaire".Results: Significant statistical interactions were found between changes in mean cortisol levels and IES scores over time. Decreasing evening cortisol levels over time were significantly related to decreasing IES scores and vice versa. Morning cortisol levels showed negative, and evening cortisol positive correlations with all rating scores.Conclusions: The evidence from previous studies on trauma related stress, that salivary cortisol is related to the development of posttraumatic stress reactions, the morning cortisol in reverse (negative) direction to that (positive) of evening cortisol, were confirmed.
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3.
  • Johansson, Mikael, et al. (författare)
  • Partners in time: EARLY BIRD reveals novel regulatory function of ZEITLUPE in the Arabidopsis clock
  • Annan publikation (övrigt vetenskapligt/konstnärligt)abstract
    • The circadian clock of the model plant Arabidopsis thaliana is made up of acomplex series of interacting feedback loops whereby proteins regulate their ownexpression across day and night. early bird (ebi) is a circadian mutation that causesthe clock to speed up: ebi plants have short circadian periods, early phase of clockgene expression and are early flowering. We show that EBI associates with ZEITLUPE (ZTL), known to act in the plant clock as a post-translational mediator of protein degradation. However, EBI is not degraded by its interaction with ZTL. Instead, EBI acts in opposition to ZTL, modulating the expression of key circadiancomponents. The partnership of EBI with ZTL reveals a novel mechanism involved incontrolling the complex transcription-translation feedback loops of the clock. Thiswork highlights the importance of cross-talk between the ubiquitination pathway andtranscriptional control for regulation of the plant clock
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  • Klaric, Lucija, et al. (författare)
  • Mendelian randomisation identifies alternative splicing of the FAS death receptor as a mediator of severe COVID-19.
  • 2021
  • Ingår i: medRxiv : the preprint server for health sciences. - : Cold Spring Harbor Laboratory. ; , s. 1-28
  • Annan publikation (övrigt vetenskapligt/konstnärligt)abstract
    • Severe COVID-19 is characterised by immunopathology and epithelial injury. Proteomic studies have identified circulating proteins that are biomarkers of severe COVID-19, but cannot distinguish correlation from causation. To address this, we performed Mendelian randomisation (MR) to identify proteins that mediate severe COVID-19. Using protein quantitative trait loci (pQTL) data from the SCALLOP consortium, involving meta-analysis of up to 26,494 individuals, and COVID-19 genome-wide association data from the Host Genetics Initiative, we performed MR for 157 COVID-19 severity protein biomarkers. We identified significant MR results for five proteins: FAS, TNFRSF10A, CCL2, EPHB4 and LGALS9. Further evaluation of these candidates using sensitivity analyses and colocalization testing provided strong evidence to implicate the apoptosis-associated cytokine receptor FAS as a causal mediator of severe COVID-19. This effect was specific to severe disease. Using RNA-seq data from 4,778 individuals, we demonstrate that the pQTL at the FAS locus results from genetically influenced alternate splicing causing skipping of exon 6. We show that the risk allele for very severe COVID-19 increases the proportion of transcripts lacking exon 6, and thereby increases soluble FAS. Soluble FAS acts as a decoy receptor for FAS-ligand, inhibiting apoptosis induced through membrane-bound FAS. In summary, we demonstrate a novel genetic mechanism that contributes to risk of severe of COVID-19, highlighting a pathway that may be a promising therapeutic target.
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