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  • 1
    In: Nature, Springer Science and Business Media LLC, Vol. 600, No. 7889 ( 2021-12-16), p. 472-477
    Kurzfassung: The genetic make-up of an individual contributes to the susceptibility and response to viral infection. Although environmental, clinical and social factors have a role in the chance of exposure to SARS-CoV-2 and the severity of COVID-19 1,2 , host genetics may also be important. Identifying host-specific genetic factors may reveal biological mechanisms of therapeutic relevance and clarify causal relationships of modifiable environmental risk factors for SARS-CoV-2 infection and outcomes. We formed a global network of researchers to investigate the role of human genetics in SARS-CoV-2 infection and COVID-19 severity. Here we describe the results of three genome-wide association meta-analyses that consist of up to 49,562 patients with COVID-19 from 46 studies across 19 countries. We report 13 genome-wide significant loci that are associated with SARS-CoV-2 infection or severe manifestations of COVID-19. Several of these loci correspond to previously documented associations to lung or autoimmune and inflammatory diseases 3–7 . They also represent potentially actionable mechanisms in response to infection. Mendelian randomization analyses support a causal role for smoking and body-mass index for severe COVID-19 although not for type II diabetes. The identification of novel host genetic factors associated with COVID-19 was made possible by the community of human genetics researchers coming together to prioritize the sharing of data, results, resources and analytical frameworks. This working model of international collaboration underscores what is possible for future genetic discoveries in emerging pandemics, or indeed for any complex human disease.
    Materialart: Online-Ressource
    ISSN: 0028-0836 , 1476-4687
    RVK:
    RVK:
    RVK:
    Sprache: Englisch
    Verlag: Springer Science and Business Media LLC
    Publikationsdatum: 2021
    ZDB Id: 120714-3
    ZDB Id: 1413423-8
    SSG: 11
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 2
    In: Nature, Springer Science and Business Media LLC, Vol. 607, No. 7917 ( 2022-07-07), p. 97-103
    Kurzfassung: Critical COVID-19 is caused by immune-mediated inflammatory lung injury. Host genetic variation influences the development of illness requiring critical care 1 or hospitalization 2–4 after infection with SARS-CoV-2. The GenOMICC (Genetics of Mortality in Critical Care) study enables the comparison of genomes from individuals who are critically ill with those of population controls to find underlying disease mechanisms. Here we use whole-genome sequencing in 7,491 critically ill individuals compared with 48,400 controls to discover and replicate 23 independent variants that significantly predispose to critical COVID-19. We identify 16 new independent associations, including variants within genes that are involved in interferon signalling ( IL10RB and PLSCR1 ), leucocyte differentiation ( BCL11A ) and blood-type antigen secretor status ( FUT2 ). Using transcriptome-wide association and colocalization to infer the effect of gene expression on disease severity, we find evidence that implicates multiple genes—including reduced expression of a membrane flippase ( ATP11A ), and increased expression of a mucin ( MUC1 )—in critical disease. Mendelian randomization provides evidence in support of causal roles for myeloid cell adhesion molecules ( SELE , ICAM5 and CD209 ) and the coagulation factor F8 , all of which are potentially druggable targets. Our results are broadly consistent with a multi-component model of COVID-19 pathophysiology, in which at least two distinct mechanisms can predispose to life-threatening disease: failure to control viral replication; or an enhanced tendency towards pulmonary inflammation and intravascular coagulation. We show that comparison between cases of critical illness and population controls is highly efficient for the detection of therapeutically relevant mechanisms of disease.
    Materialart: Online-Ressource
    ISSN: 0028-0836 , 1476-4687
    RVK:
    RVK:
    RVK:
    Sprache: Englisch
    Verlag: Springer Science and Business Media LLC
    Publikationsdatum: 2022
    ZDB Id: 120714-3
    ZDB Id: 1413423-8
    SSG: 11
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 3
    Online-Ressource
    Online-Ressource
    American Vacuum Society ; 2018
    In:  Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films Vol. 36, No. 2 ( 2018-03-01)
    In: Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films, American Vacuum Society, Vol. 36, No. 2 ( 2018-03-01)
    Kurzfassung: First results concerning a new approach of TiZrV non-evaporable getter (NEG) thin films coating on very small diameter vacuum chambers are presented. This new process is based on the electroforming of a vacuum chamber around a sacrificial mandrel, which is precoated with a NEG thin film. Aluminum was selected as the material of the mandrel and magnetron sputtering deposition for the coating. To improve the quality of the NEG coating, different coating layer sequences were applied and tested. The NEG activation was characterized by x-ray photoelectron spectroscopy (XPS). Data from flat samples prepared with the new technique were compared with those produced by the common magnetron sputtering method. Afterward, vacuum chambers equipped with flanges were produced. In addition to the XPS characterization, pumping speed measurements were performed. The results show CO pumping speeds comparable with the ones measured on a standard NEG coated vacuum chamber. However, H2 pumping speed exhibits ten times lower values than expected for standard NEG.
    Materialart: Online-Ressource
    ISSN: 0734-2101 , 1520-8559
    RVK:
    Sprache: Englisch
    Verlag: American Vacuum Society
    Publikationsdatum: 2018
    ZDB Id: 1475424-1
    ZDB Id: 797704-9
    Standort Signatur Einschränkungen Verfügbarkeit
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