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Träfflista för sökning "WFRF:(Sundstrom Johan) ;pers:(Levy Daniel)"

Sökning: WFRF:(Sundstrom Johan) > Levy Daniel

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1.
  • 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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2.
  • Vasan, Ramachandran S, et al. (författare)
  • Relative importance of borderline and elevated levels of coronary heart disease risk factors.
  • 2005
  • Ingår i: Ann Intern Med. - 1539-3704. ; 142:6, s. 393-402
  • Tidskriftsartikel (refereegranskat)abstract
    • BACKGROUND: Clinical trials indicate that a sizable proportion of adults have multiple borderline coronary risk factors and may benefit from treatment. OBJECTIVE: To estimate the relative and absolute contributions of borderline and elevated risk factors to the population burden of coronary heart disease (CHD) events. DESIGN: A prospective cohort study and a national cross-sectional survey. SETTING: The Framingham Study and the Third National Health and Nutrition Examination Survey (NHANES III). PARTICIPANTS: White non-Hispanic persons in the Framingham Study and in NHANES III who were between 35 to 74 years of age and had no CHD. MEASUREMENTS: Occurrence of first CHD events according to 5 major CHD risk factors: blood pressure, low-density lipoprotein and high-density lipoprotein cholesterol levels, glucose intolerance, and smoking. Three categories-optimal, borderline, and elevated-were defined for each risk factor per national guidelines. Sex-specific 10-year CHD event rates from the Framingham Study were applied to numbers of at-risk individuals estimated from NHANES III and the 2000 U.S. Census. RESULTS: Twenty-six percent of men and 41% of women had at least 1 borderline risk factor in NHANES III. According to estimates, more than 90% of CHD events will occur in individuals with at least 1 elevated risk factor, and approximately 8% will occur in people with only borderline levels of multiple risk factors. Absolute 10-year CHD risk exceeded 10% in men older than age 45 years who had 1 elevated risk factor and 4 or more borderline risk factors and in those who had at least 2 elevated risk factors. In women, absolute CHD risk exceeded 10% only in those older than age 55 years who had at least 3 elevated risk factors. LIMITATIONS: The generalizability of the findings to persons of other ethnic backgrounds is unknown. CONCLUSIONS: Borderline CHD risk factors alone account for a small proportion of CHD events.
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