Astrocyte-specific autophagy deficiency induces NADPH oxidase-mediated oxidative stress in motor neurons via mitophagy impairment

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How do non-cell autonomous effects of autophagy dysfunction contribute to ALS pathogenesis?

The authors explicitly state that the manner and extent to which autophagy dysfunction in non-neuronal cells contributes to ALS is not fully understood. This gap limits understanding of disease progression and therapeutic targeting strategies. Gap type: open_question Source paper: Autophagy and ALS: mechanistic insights and therapeutic implications. (2022, Autophagy, PMID:34057020)

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graph TD
    MTOR["MTOR"] -.->|inhibits| autophagy_initiation["autophagy initiation"]
    mitochondrial_DAMPs["mitochondrial DAMPs"] -->|triggers| microglial_activation["microglial activation"]
    SOD1["SOD1"] -->|causes| protein_aggregation["protein aggregation"]
    SQSTM1["SQSTM1"] -->|mediates| selective_autophagy["selective autophagy"]
    ULK1["ULK1"] -->|initiates| autophagy_initiation_1["autophagy initiation"]
    AQP4["AQP4"] -->|facilitates| glymphatic_clearance["glymphatic clearance"]
    autophagy_dysfunction["autophagy dysfunction"] -->|contributes to| ALS["ALS"]
    non_cell_autonomous_mecha["non-cell autonomous mechanisms"] -->|drives| neurodegeneration["neurodegeneration"]
    PINK1["PINK1"] -.->|reduces| mitochondrial_DAMP_releas["mitochondrial DAMP release"]
    ATG7["ATG7"] -->|enhances| damaged_myelin_debris_cle["damaged myelin debris clearance"]
    glial_activation["glial activation"] -->|causes| neurodegeneration_2["neurodegeneration"]
    misfolded_proteins["misfolded proteins"] -->|causes| motor_neuron_death["motor neuron death"]
    style MTOR fill:#ce93d8,stroke:#333,color:#000
    style autophagy_initiation fill:#81c784,stroke:#333,color:#000
    style mitochondrial_DAMPs fill:#4fc3f7,stroke:#333,color:#000
    style microglial_activation fill:#4fc3f7,stroke:#333,color:#000
    style SOD1 fill:#ce93d8,stroke:#333,color:#000
    style protein_aggregation fill:#4fc3f7,stroke:#333,color:#000
    style SQSTM1 fill:#ce93d8,stroke:#333,color:#000
    style selective_autophagy fill:#81c784,stroke:#333,color:#000
    style ULK1 fill:#ce93d8,stroke:#333,color:#000
    style autophagy_initiation_1 fill:#81c784,stroke:#333,color:#000
    style AQP4 fill:#ce93d8,stroke:#333,color:#000
    style glymphatic_clearance fill:#81c784,stroke:#333,color:#000
    style autophagy_dysfunction fill:#4fc3f7,stroke:#333,color:#000
    style ALS fill:#ef5350,stroke:#333,color:#000
    style non_cell_autonomous_mecha fill:#4fc3f7,stroke:#333,color:#000
    style neurodegeneration fill:#4fc3f7,stroke:#333,color:#000
    style PINK1 fill:#ce93d8,stroke:#333,color:#000
    style mitochondrial_DAMP_releas fill:#4fc3f7,stroke:#333,color:#000
    style ATG7 fill:#ce93d8,stroke:#333,color:#000
    style damaged_myelin_debris_cle fill:#4fc3f7,stroke:#333,color:#000
    style glial_activation fill:#4fc3f7,stroke:#333,color:#000
    style neurodegeneration_2 fill:#4fc3f7,stroke:#333,color:#000
    style misfolded_proteins fill:#4fc3f7,stroke:#333,color:#000
    style motor_neuron_death fill:#4fc3f7,stroke:#333,color:#000

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