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Sökning: WFRF:(Eidsmo Liv) > (2015-2019)

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1.
  • Baptista, Marisa A. P., et al. (författare)
  • Deletion of Wiskott-Aldrich syndrome protein triggers Rac2 activity and increased cross-presentation by dendritic cells
  • 2016
  • Ingår i: Nature Communications. - : Springer Science and Business Media LLC. - 2041-1723. ; 7
  • Tidskriftsartikel (refereegranskat)abstract
    • Wiskott-Aldrich syndrome (WAS) is caused by loss-of-function mutations in the WASp gene. Decreased cellular responses in WASp-deficient cells have been interpreted to mean that WASp directly regulates these responses in WASp-sufficient cells. Here, we identify an exception to this concept and show that WASp-deficient dendritic cells have increased activation of Rac2 that support cross-presentation to CD8(+) T cells. Using two different skin pathology models, WASp-deficient mice show an accumulation of dendritic cells in the skin and increased expansion of IFN gamma-producing CD8(+) T cells in the draining lymph node and spleen. Specific deletion of WASp in dendritic cells leads to marked expansion of CD8(+) T cells at the expense of CD4(+) T cells. WASp-deficient dendritic cells induce increased cross-presentation to CD8(+) T cells by activating Rac2 that maintains a near neutral pH of phagosomes. Our data reveals an intricate balance between activation of WASp and Rac2 signalling pathways in dendritic cells.
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  • Li, Xi, et al. (författare)
  • MicroRNA-132 with Therapeutic Potential in Chronic Wounds.
  • 2017
  • Ingår i: Journal of Investigative Dermatology. - : Elsevier BV. - 0022-202X .- 1523-1747. ; 137:12, s. 2630-2638
  • Tidskriftsartikel (refereegranskat)abstract
    • Chronic wounds represent a major and rising health and economic burden worldwide. There is a continued search toward more effective wound therapy. We found significantly reduced microRNA-132 (miR-132) expression in human diabetic ulcers compared with normal skin wounds and also in skin wounds of leptin receptor-deficient (db/db) diabetic mice compared with wild-type mice. Local replenishment of miR-132 in the wounds of db/db mice accelerated wound closure effectively, which was accompanied by increased proliferation of wound edge keratinocytes and reduced inflammation. The pro-healing effect of miR-132 was further supported by global transcriptome analysis, which showed that several inflammation-related signaling pathways (e.g., NF-κB, NOD-like receptor, toll-like receptor, and tumor necrosis factor signaling pathways) were the top ones regulated by miR-132 in vivo. Moreover, we topically applied liposome-formulated miR-132 mimics mixed with pluronic F-127 gel on human ex vivo skin wounds, which promoted re-epithelialization. Together, our study showed the therapeutic potential of miR-132 in chronic wounds, which warrants further evaluation in controlled clinical trials.
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