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Sökning: WFRF:(Viollet Coralie)

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1.
  • Dewan, Ramita, et al. (författare)
  • Pathogenic Huntingtin Repeat Expansions in Patients with Frontotemporal Dementia and Amyotrophic Lateral Sclerosis
  • 2020
  • Ingår i: Neuron. - : Cell Press. - 0896-6273. ; 109:3, s. 448-460.e4
  • Tidskriftsartikel (refereegranskat)abstract
    • Using large-scale whole-genome sequencing, Dewan et al. identify pathogenic HTT repeat expansions in patients diagnosed with FTD/ALS neurodegenerative disorders. Autopsies confirm the TDP-43 pathology expected in FTD/ALS and show polyglutamine inclusions within the frontal cortices but no striatal degeneration. These data broaden the phenotype resulting from HTT repeat expansions.
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2.
  • Mogilenko, Denis A., et al. (författare)
  • Metabolic and Innate Immune Cues Merge into a Specific Inflammatory Response via the UPR
  • 2019
  • Ingår i: Cell. - : CELL PRESS. - 0092-8674 .- 1097-4172. ; 177:5, s. 1201-
  • Tidskriftsartikel (refereegranskat)abstract
    • Innate immune responses are intricately linked with intracellular metabolism of myeloid cells. Toll-like receptor (TLR) stimulation shifts intracellular metabolism toward glycolysis, while anti-inflammatory signals depend on enhanced mitochondrial respiration. How exogenous metabolic signals affect the immune response is unknown. We demonstrate that TLR-dependent responses of dendritic cells (DCs) are exacerbated by a high-fatty-acid (FA) metabolic environment. FAs suppress the TLR-induced hexokinase activity and perturb tricarboxylic acid cycle metabolism. These metabolic changes enhance mitochondria! reactive oxygen species (mtROS) production and, in turn, the unfolded protein response (UPR), leading to a distinct transcriptomic signature with IL-23 as hallmark. Interestingly, chemical or genetic suppression of glycolysis was sufficient to induce this specific immune response. Conversely, reducing mtROS production or DC-specific deficiency in XBP1 attenuated IL-23 expression and skin inflammation in an IL-23-dependent model of psoriasis. Thus, fine-tuning of innate immunity depends on optimization of metabolic demands and minimization of mtROS-induced UPR.
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