DJ-1 Protein Function and Oxidative Stress in Neurodegenerative Diseases

DJ-1 (PARK7) is a multifunctional protein central to cellular defence against oxidative stress and proteotoxic insults, with mutations or dysregulation linked to familial and sporadic forms of Parkinson’s and other neurodegenerative diseases. Functioning as a redox sensor, molecular chaperone and deglycase, DJ-1 mitigates reactive oxygen species (ROS) accumulation, repairs glycation damage and modulates key transcriptional pathways such as Nrf2, PI3K/PKB and p53 to maintain mitochondrial integrity and proteostasis. It also interacts with α-synuclein to attenuate aggregation. Beyond neuronal roles, DJ-1 in glial cells—astrocytes and microglia—supports metabolic cooperation and regulates neuroinflammatory programmes. Oxidative modification of its conserved cysteine residue governs its activity, and loss of function compromises autophagy, proteasomal dynamics and lysosomal clearance, accelerating neuronal vulnerability. As a detectable oxidised species in patient biofluids, DJ-1 holds promise both as a biomarker and as a target for therapies aimed at bolstering antioxidant defences and restoring protein homeostasis in affected brain regions.

Research from Nature Portfolio

Recent studies employing human midbrain organoids deficient in DJ-1 reveal that loss of DJ-1 impairs lysosomal proteolysis in astrocytes, driving accumulation of advanced glycation end products, enhanced α-synuclein phosphorylation and protein aggregation. Co-culture experiments demonstrate that DJ-1–competent astrocytes restore proteolytic capacity and mitigate neurodegenerative cascades. Complementary work has shown that under oxidative challenge DJ-1 binds to the 20S proteasome, transiently inhibiting its activity while simultaneously activating Nrf2-dependent upregulation of proteasomal components and antioxidant responses. This dual regulatory circuit balances the removal of damaged proteins with the preservation of intrinsically unstructured regulatory proteins, highlighting a dynamic role for DJ-1 in proteasomal control during stress.

DJ-1 Protein Function and Oxidative Stress in Neurodegenerative Diseases publication trend

The graph below shows the total number of articles in dj-1 protein function and oxidative stress in neurodegenerative diseases across all publications each year (not limited to Nature Index journals).

Technical terms

Oxidative stress: imbalance between ROS production and antioxidant defences that damages cellular components.

Reactive oxygen species (ROS): chemically reactive molecules derived from oxygen that can cause macromolecular damage.

Proteostasis: the regulated balance of protein synthesis, folding, trafficking and degradation.

Proteasome: a multicatalytic protein complex responsible for targeted degradation of damaged or misfolded proteins.

Glycation: non-enzymatic covalent modification of proteins by reducing sugars, impairing function.

Microglia: resident immune cells of the central nervous system involved in surveillance and inflammatory responses.

Astrocytes: glial cells that support neuronal metabolism, synaptic function and clearance of toxins.

Autophagy: lysosome-dependent process for bulk degradation and recycling of cellular constituents.

References

1. Disruption of lysosomal proteolysis in astrocytes facilitates midbrain organoid proteostasis failure in an early-onset Parkinson’s disease model. Nature Communications (2024).
2. PARK7/DJ-1 in microglia: implications in Parkinson’s disease and relevance as a therapeutic target. Journal of Neuroinflammation (2023).
3. Regulation of Hsa‐miR‐4639‐5p expression and its potential role in the pathogenesis of Parkinson's disease. Aging Cell (2023).
4. Role of DJ-1 in the mechanism of pathogenesis of Parkinson's disease. Journal of Bioenergetics and Biomembranes (2019).
5. Parkinsonism-associated Protein DJ-1/Park7 Is a Major Protein Deglycase That Repairs Methylglyoxal- and Glyoxal-glycated Cysteine, Arginine, and Lysine Residues. Journal of Biological Chemistry (2014).
6. DJ-1 Is a Redox-Dependent Molecular Chaperone That Inhibits α-Synuclein Aggregate Formation. PLOS Biology (2004).
7. DJ-1 interactions with α-synuclein attenuate aggregation and cellular toxicity in models of Parkinson’s disease. Cell Death & Disease (2014).
8. DJ-1 Up-regulates Glutathione Synthesis during Oxidative Stress and Inhibits A53T α-Synuclein Toxicity*. Journal of Biological Chemistry (2005).
9. Formation of a Stabilized Cysteine Sulfinic Acid Is Critical for the Mitochondrial Function of the Parkinsonism Protein DJ-1*. Journal of Biological Chemistry (2009).
10. Reduced Basal Autophagy and Impaired Mitochondrial Dynamics Due to Loss of Parkinson's Disease-Associated Protein DJ-1. PLOS ONE (2010).
11. The Parkinson’s-associated protein DJ-1 regulates the 20S proteasome. Nature Communications (2015).
12. Oxidative Damage of DJ-1 Is Linked to Sporadic Parkinson and Alzheimer Diseases*. Journal of Biological Chemistry (2006).