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Integrative analysis reveals a conserved role for the amyloid precursor protein in proteostasis during aging

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Listed:
  • Vanitha Nithianandam

    (Brigham and Women’s Hospital, Harvard Medical School
    Aligning Science Across Parkinson’s (ASAP) Collaborative Research Network)

  • Hassan Bukhari

    (Brigham and Women’s Hospital, Harvard Medical School
    Aligning Science Across Parkinson’s (ASAP) Collaborative Research Network)

  • Matthew J. Leventhal

    (Massachusetts Institute of Technology
    MIT Ph.D. Program in Computational and Systems Biology)

  • Rachel A. Battaglia

    (Brigham and Women’s Hospital, Harvard Medical School
    Aligning Science Across Parkinson’s (ASAP) Collaborative Research Network)

  • Xianjun Dong

    (Aligning Science Across Parkinson’s (ASAP) Collaborative Research Network
    Genomics and Bioinformatics Hub, Brigham and Women’s Hospital)

  • Ernest Fraenkel

    (Massachusetts Institute of Technology)

  • Mel B. Feany

    (Brigham and Women’s Hospital, Harvard Medical School
    Aligning Science Across Parkinson’s (ASAP) Collaborative Research Network)

Abstract

Aβ peptides derived from the amyloid precursor protein (APP) have been strongly implicated in the pathogenesis of Alzheimer’s disease. However, the normal function of APP and the importance of that role in neurodegenerative disease is less clear. We recover the Drosophila ortholog of APP, Appl, in an unbiased forward genetic screen for neurodegeneration mutants. We perform comprehensive single cell transcriptional and proteomic studies of Appl mutant flies to investigate Appl function in the aging brain. We find an unexpected role for Appl in control of multiple cellular pathways, including translation, mitochondrial function, nucleic acid and lipid metabolism, cellular signaling and proteostasis. We mechanistically define a role for Appl in regulating autophagy through TGFβ signaling and document the broader relevance of our findings using mouse genetic, human iPSC and in vivo tauopathy models. Our results demonstrate a conserved role for APP in controlling age-dependent proteostasis with plausible relevance to Alzheimer’s disease.

Suggested Citation

  • Vanitha Nithianandam & Hassan Bukhari & Matthew J. Leventhal & Rachel A. Battaglia & Xianjun Dong & Ernest Fraenkel & Mel B. Feany, 2023. "Integrative analysis reveals a conserved role for the amyloid precursor protein in proteostasis during aging," Nature Communications, Nature, vol. 14(1), pages 1-19, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-42822-1
    DOI: 10.1038/s41467-023-42822-1
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