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Träfflista för sökning "WFRF:(Giraud Antoine) srt2:(2005-2009)"

Sökning: WFRF:(Giraud Antoine) > (2005-2009)

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1.
  • Giraud, Antoine, 1972- (författare)
  • Axenic mice model.
  • 2008
  • Ingår i: Innate Immunity. - Totowa, NJ : Humana Press. - 9781588297464 - 9781597455701 ; , s. 321-336
  • Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
    • The interaction of an organism with surrounding microbial communities has a profound impact on its anatomy, physiology, and behavior. The innate immune system plays a major role in the crosstalk between bacteria and the hosts they colonize. Axenic mice provide a powerful in vivo controlled model to decipher the particular interactions between the host and one defined strain, or group of strains, isolated from the "noise" of the rest of the flora. This chapter briefly reviews the specificities of axenic mice and describes the main guidelines to derive, house, and work with axenic mice.
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2.
  • Giraud, Antoine, et al. (författare)
  • Dissecting the genetic components of adaptation of Escherichia coli to the mouse gut
  • 2008
  • Ingår i: PLOS Genetics. - : Public Library of Science (PLoS). - 1553-7390 .- 1553-7404. ; 4:1
  • Tidskriftsartikel (refereegranskat)abstract
    • While pleiotropic adaptive mutations are thought to be central for evolution, little is known on the downstream molecular effects allowing adaptation to complex ecologically relevant environments. Here we show that Escherichia coli MG1655 adapts rapidly to the intestine of germ-free mice by single point mutations in EnvZ/OmpR two-component signal transduction system, which controls more than 100 genes. The selective advantage conferred by the mutations that modulate EnvZ/OmpR activities was the result of their independent and additive effects on flagellin expression and permeability. These results obtained in vivo thus suggest that global regulators may have evolved to coordinate activities that need to be fine-tuned simultaneously during adaptation to complex environments and that mutations in such regulators permit adjustment of the boundaries of physiological adaptation when switching between two very distinct environments.
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