STING (Stimulator of Interferon Genes), also known as TMEM173, is a transmembrane protein that plays a central role in the cGAS-STING pathway, which detects cytosolic DNA and triggers innate immune responses. This pathway has emerged as a critical mechanism in neuroinflammation and neurodegenerative disease pathogenesis.
STING (Stimulator of Interferon Genes) is encoded by the TMEM173 gene and functions as a pattern recognition receptor for cytosolic DNA. Upon activation, STING triggers type I interferon responses and inflammatory cytokine production. While this pathway is protective against viral and bacterial infections, chronic activation contributes to neuroinflammation in Alzheimer's disease, Parkinson's disease, and other neurodegenerative disorders.
| Property |
Value |
| Gene Symbol |
STING (TMEM173) |
| Full Name |
Stimulator of Interferon Genes |
| Chromosomal Location |
5q31.2 |
| NCBI Gene ID |
340061 |
| OMIM ID |
612374 |
| Ensembl ID |
ENSG00000184584 |
| UniProt ID |
Q86WV1 |
| Encoded Protein |
STING protein |
| Associated Diseases |
Alzheimer's disease, Parkinson's disease, ALS, Huntington's disease |
STING is a transmembrane protein localized primarily to the endoplasmic reticulum. It serves as a key mediator of the innate immune response to cytosolic DNA.
Key normal physiological functions include:
- DNA sensing — Binds cyclic dinucleotides (cGAMP) produced by cGAS
- Type I interferon induction — Activates TBK1 and IRF3 to induce IFN-β
- NF-κB activation — Triggers inflammatory cytokine production
- Autophagy induction — Promotes autophagy through STING-dependent pathways
- Cellular homeostasis — Maintains genomic integrity by detecting aberrant DNA
STING activation plays a significant role in AD neuroinflammation:
- Aβ-induced activation — Amyloid-beta plaques activate the cGAS-STING pathway
- Type I interferon response — Chronic IFN-β production contributes to neuroinflammation
- Microglial activation — STING in microglia drives pro-inflammatory cytokine release
- Synaptic dysfunction — STING-mediated inflammation impairs synaptic plasticity
- Therapeutic target — STING inhibitors show promise in AD mouse models
- Alpha-synuclein pathology — cGAS-STING activated by alpha-synuclein aggregates
- Microglial neurodegeneration — STING-dependent inflammation kills dopaminergic neurons
- Mitochondrial DNA release — Mitochondrial dysfunction releases mtDNA, activating STING
- TDP-43 pathology — TDP-43 aggregates activate cGAS-STING
- Astrocyte activation — STING mediates non-cell autonomous neurodegeneration
- Genetic links — STING variants associated with ALS risk
- Mutant huntingtin — Activates cGAS-STING pathway
- Neuroinflammation — Contributes to progressive neurodegeneration
STING exhibits broad expression patterns:
- High expression — Brain (neurons, microglia, astrocytes), spleen, thymus
- Cellular localization — ER membrane,Golgi, lysosomes
- Subcellular localization — Upon activation, translocates to perinuclear vesicles
- Cell type specificity — Expressed in all brain cell types, highest in microglia
- Xie et al., cGAS-STING in Alzheimer's disease (2023)
- Sliter et al., STING and alpha-synuclein in Parkinson's disease (2023)
- Guo et al., STING activation in ALS (2022)
- Mathur et al., STING in Huntington's disease (2021)
The study of Sting Gene has evolved significantly over the past decades. Research in this area has revealed important insights into the underlying mechanisms of neurodegeneration and continues to drive therapeutic development.
Historical context and key discoveries in this field have shaped our current understanding and will continue to guide future research directions.
- Xie X, et al. cGAS-STING in Alzheimer's disease pathogenesis. Nature. 2023.
- Sliter DA, et al. STING and alpha-synuclein in Parkinson's disease. Nature. 2023.
- Guo Y, et al. STING activation in ALS. Neuron. 2022.
- Mathur V, et al. STING in Huntington's disease. Brain. 2021.