Medicine› Neurology› Parkinson's Disease Mechanisms and Treatments

Parkinson's disease — cGAS/STING innate immune signalling in Pink1/parkin loss

Submitted 2026-10-22

Field: Medicine › NeurologyType: No effect foundArea: parkinson's diseaseTarget: cGAS/STING innate immune signalling in Pink1/parkin lossStage: preclinical

Hypothesis

Because knocking out Sting prevented neurodegeneration in Pink1/Prkn-deficient mice under mitochondrial stress, removing Sting in Drosophila would likewise rescue Pink1/parkin mutant defects.

What failed

Loss of Sting, or of its downstream effector Relish, did not suppress the behavioural deficits or the mitochondrial disruption of Drosophila Pink1 or parkin mutants, nor of an mtDNA mutator model.

Broken assumption

STING-driven inflammation is a conserved cause of Pink1/parkin pathology across species.

Why

The authors conclude that the phenotypes caused by losing Pink1/parkin are not universally driven by aberrant STING activation; the mouse mechanism did not carry over to flies.

From the published paper: Lee et al. Scientific Reports, 2020. ↗CC BY

Research ideas from this failure

Unvetted lead — read the papers

New hypotheses this failure suggests, each with a crucial experiment, a rival explanation of the original result, and the papers it rests on. Written by AI from paper titles and abstracts found on OpenAlex (and Europe PMC, for life and health sciences).

Related failures (1)

Matched on shared genes, mechanisms and ways of failing as well as wording. Each shows why it matched — treat these as leads rather than verdicts.

parkinson's diseaseLRRK2 (wild-type and G2019S)
High levels of LRRK2, especially the G2019S mutant that causes inherited Parkinson's disease, would cause or worsen alpha-synuclein disease in mouse brain neurons.
High LRRK2 left alpha-synuclein and Tau levels unchanged and did not worsen alpha-synuclein disease in mice that also made high alpha-synuclein. In some lines, high LRRK2 improved motor skills.
Why it matched: same research area · failed the same way: Held in the model species, not beyond it

Links in published research

Where this experiment's genes are known to matter outside its own research area, and the papers behind those links. Sources: Open Targets Platform and Europe PMC.