What upstream mechanisms trigger c-Jun upregulation specifically in Alzheimer's disease?

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Description

The study identifies c-Jun upregulation as the key driver of TE mobilization and downstream pathology, but doesn’t explain what causes this initial c-Jun elevation in AD. Understanding this trigger mechanism is critical for developing preventive interventions targeting the earliest disease stages.

Gap type: unexplained_observation Source paper: JUN upregulation drives aberrant transposable element mobilization, associated innate immune response, and impaired neurogenesis in Alzheimer’s disease. (2023, Nature communications, PMID:38049398)

Resolution criteria

Resolved when upstream triggers of c-Jun induction in AD neural cells are identified and causally tested. Required evidence: time-course transcriptomics/ATAC-seq or phosphoproteomics in AD organoids, iPSC neurons, or postmortem single-cell datasets; candidate triggers such as Abeta/tau stress, DNA damage, innate immune signaling, or oxidative stress; and perturbation of JNK/AP-1 pathway components. Closure requires showing which trigger is necessary and sufficient for c-Jun upregulation and downstream transposable-element mobilization.

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