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Sökning: WFRF:(Kwiecinski H)

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  • Badelek, B, et al. (författare)
  • The photon collider at TESLA
  • 2004
  • Ingår i: International Journal of Modern Physics A. - 0217-751X. ; 19:30, s. 5097-5186
  • Forskningsöversikt (refereegranskat)abstract
    • High energy photon colliders (gammagamma,gammae) are based on e(-)e(-) linear colliders where high energy photons are produced using Compton scattering of laser light on high energy electrons just before the interaction point. This paper is a part of the Technical Design Report of the linear collider TESLA.(1) Physics program, possible parameters and some technical aspects of the photon collider at TESLA are discussed.
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  • Peetermans, Marijke, et al. (författare)
  • Plasminogen activation by staphylokinase enhances local spreading of S. aureus in skin infections.
  • 2014
  • Ingår i: BMC microbiology. - : Springer Science and Business Media LLC. - 1471-2180. ; 14:1
  • Tidskriftsartikel (refereegranskat)abstract
    • Background Staphylococcus aureus (S. aureus) is a frequent cause of skin and soft tissue infections. A unique feature of S. aureus is the combined presence of coagulases that trigger fibrin formation and of the plasminogen activator staphylokinase (SAK). Whereas the importance of fibrin generation for S. aureus virulence has been established, the role of SAK remains unclear.We studied the role of plasminogen activation by SAK in a skin infection model in mice and evaluated the impact of alpha-2-antiplasmin (¿2AP) deficiency on the spreading and proteolytic activity of S. aureus skin infections. The species-selectivity of SAK was overcome by adenoviral expression of human plasminogen. Bacterial spread and density was assessed non-invasively by imaging the bioluminescence of S. aureus Xen36.ResultsSAK-mediated plasmin activity increased the local invasiveness of S. aureus, leading to larger lesions with skin disruption as well as decreased bacterial clearance by the host. Even though fibrin and bacterial surfaces protected SAK-mediated plasmin activity from inhibition by ¿2AP, the deficiency of ¿2AP resulted in increased bacterial spreading. SAK-mediated plasmin also induced secondary activation of gelatinases, shown both in vitro and in lesions from the in vivo model.ConclusionSAK contributes to the phenotype of S. aureus skin infections by enhancing bacterial spreading as a result of fibrinolytic and proteolytic activation.
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  • Resultat 1-6 av 6

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