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Sökning: WFRF:(Donachie Martin)

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1.
  • Grdic Eliasson, Dubravka, et al. (författare)
  • The mucosal adjuvant effects of cholera toxin and immune-stimulating complexes differ in their requirement for IL-12, indicating different pathways of action.
  • 1999
  • Ingår i: European journal of immunology. - 0014-2980. ; 29:6, s. 1774-84
  • Tidskriftsartikel (refereegranskat)abstract
    • Adjuvants that can improve mucosal vaccine efficacy are much warranted. In this comparative study between cholera toxin (CT) and immune-stimulating complexes (ISCOM) we found that, contrary to CT, ovalbumin (OVA)-ISCOM were poor inducers of mucosal anti-OVA IgA responses, but induced similar or better systemic immunity following oral immunizations. The addition of CT to the oral OVA-ISCOM protocol did not stimulate local anti-OVA IgA immunity, nor did it change the quality or magnitude of the systemic responses. Both vectors recruited strong innate immunity, but only OVA-ISCOM could directly induce IL-12, demonstrable at the protein and mRNA levels. CT had no inhibitory effects on lipopolysaccharide/IFN-gamma-induced IL-12 mRNA expression or IL-12 production. Furthermore, adjuvanticity of CT was unaffected in IL-12-deficient mice, while OVA-ISCOM showed partly impaired adjuvant effects by the lack of IL-12. CT abrogated the induction of oral tolerance stimulated by antigen feeding in these mice. In addition, CT did not alter TGF-beta levels, suggesting that the immunomodulating effect of CT was independent of IL-12 as well as TGF-beta production. Taken together, these findings indicate that mucosal adjuvanticity of CT and ISCOM are differently dependent on IL-12, suggesting that separate and distinct antigen-processing pathways are involved.
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2.
  • Hirao, Yuki, et al. (författare)
  • OGLE-2017-BLG-0406 : Spitzer Microlens Parallax Reveals Saturn-mass Planet Orbiting M-dwarf Host in the Inner Galactic Disk
  • 2020
  • Ingår i: Astronomical Journal. - : American Astronomical Society. - 0004-6256 .- 1538-3881. ; 160:2
  • Tidskriftsartikel (refereegranskat)abstract
    • We report the discovery and analysis of the planetary microlensing event OGLE-2017-BLG-0406, which was observed both from the ground and by the Spitzer satellite in a solar orbit. At high magnification, the anomaly in the light curve was densely observed by ground-based-survey and follow-up groups, and it was found to be explained by a planetary lens with a planet/host mass ratio of q = 7.0 x 10(-4) from the light-curve modeling. The ground-only and Spitzer-only data each provide very strong one-dimensional (1D) constraints on the 2D microlens parallax vector pi(E). When combined, these yield a precise measurement of pi(E) and of the masses of the host M-host = 0.56 +/- 0.07 M-circle dot and planet M-planet = 0.41 +/- 0.05 M-Jup. The system lies at a distance D-L = 5.2 +/- 0.5 kpc from the Sun toward the Galactic bulge, and the host is more likely to be a disk population star according to the kinematics of the lens. The projected separation of the planet from the host is a(perpendicular to) = 3.5 +/- 0.3 au (i.e., just over twice the snow line). The Galactic-disk kinematics are established in part from a precise measurement of the source proper motion based on OGLE-IV data. By contrast, the Gaia proper-motion measurement of the source suffers from a catastrophic 10 sigma error.
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