ArticleCell structure and function2025
A quantitative method to monitor STING degradation with dual-luciferase reporters.
Article in Cell structure and function, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed.
- Review
- A PI(3,5)PNature communications · 2026Article
- Cell biological insights into human STING variants.Cell structure and function · 2025Review
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9 authors.
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Abstract
Stimulator of interferon genes (STING) triggers the type I interferon and inflammatory responses against a variety of DNA pathogens, which is essential to limiting viral infection and replication. STING activates the downstream kinase TBK1 at the trans-Golgi network (TGN) and is degraded at lysosomes through a process called lysosomal microautophagy. Impaired STING targeting to lysosomes results in the prolonged inflammatory signal, which may be associated with a variety of neurodegenerative and autoinflammatory diseases. Thus, development of methods to quantify STING degradation helps understand the mechanism of lysosomal microautophagy and its related diseases. Here we report a quantitative method to monitor STING degradation with two luciferases, firefly luciferase (FLuc) and Nanoluciferase (NLuc). The expression plasmid is composed of FLuc, a P2A self-cleavage site, and NLuc-tagged STING. FLuc intensity reflects the total amount of translated protein, serving as an internal control, while NLuc intensity corresponds to the amount of STING. Comparison of the NLuc/FLuc ratios at different time points after STING stimulation revealed the kinetics of decay of STING levels in live cells. This method should provide a useful complement to western blotting and fluorescence-activated cell sorter (FACS) analysis presently used to monitor STING degradation.Key words: innate immunity, STING, membrane traffic, lysosomal degradation, luciferase.
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