Frontiers in Immunology (Jan 2024)

Inflammasome signaling is dispensable for ß-amyloid-induced neuropathology in preclinical models of Alzheimer’s disease

  • Sahana Srinivasan,
  • Sahana Srinivasan,
  • Daliya Kancheva,
  • Sofie De Ren,
  • Takashi Saito,
  • Takashi Saito,
  • Takashi Saito,
  • Maude Jans,
  • Maude Jans,
  • Fleur Boone,
  • Fleur Boone,
  • Charysse Vandendriessche,
  • Charysse Vandendriessche,
  • Ine Paesmans,
  • Hervé Maurin,
  • Roosmarijn E. Vandenbroucke,
  • Roosmarijn E. Vandenbroucke,
  • Esther Hoste,
  • Esther Hoste,
  • Sofie Voet,
  • Sofie Voet,
  • Isabelle Scheyltjens,
  • Benjamin Pavie,
  • Benjamin Pavie,
  • Saskia Lippens,
  • Saskia Lippens,
  • Marius Schwabenland,
  • Marco Prinz,
  • Marco Prinz,
  • Marco Prinz,
  • Takaomi Saido,
  • Astrid Bottelbergs,
  • Kiavash Movahedi,
  • Mohamed Lamkanfi,
  • Geert van Loo,
  • Geert van Loo

DOI
https://doi.org/10.3389/fimmu.2024.1323409
Journal volume & issue
Vol. 15

Abstract

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BackgroundAlzheimer’s disease (AD) is the most common neurodegenerative disorder affecting memory and cognition. The disease is accompanied by an abnormal deposition of ß-amyloid plaques in the brain that contributes to neurodegeneration and is known to induce glial inflammation. Studies in the APP/PS1 mouse model of ß-amyloid-induced neuropathology have suggested a role for inflammasome activation in ß-amyloid-induced neuroinflammation and neuropathology.MethodsHere, we evaluated the in vivo role of microglia-selective and full body inflammasome signalling in several mouse models of ß-amyloid-induced AD neuropathology.ResultsMicroglia-specific deletion of the inflammasome regulator A20 and inflammasome effector protease caspase-1 in the AppNL-G-F and APP/PS1 models failed to identify a prominent role for microglial inflammasome signalling in ß-amyloid-induced neuropathology. Moreover, global inflammasome inactivation through respectively full body deletion of caspases 1 and 11 in AppNL-G-F mice and Nlrp3 deletion in APP/PS1 mice also failed to modulate amyloid pathology and disease progression. In agreement, single-cell RNA sequencing did not reveal an important role for Nlrp3 signalling in driving microglial activation and the transition into disease-associated states, both during homeostasis and upon amyloid pathology.ConclusionCollectively, these results question a generalizable role for inflammasome activation in preclinical amyloid-only models of neuroinflammation.

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