期刊
FEBS JOURNAL
卷 290, 期 8, 页码 2127-2145出版社
WILEY
DOI: 10.1111/febs.16691
关键词
CBR1; diapause; Helicoverpa armigera; protein carbonyl; ROS
This study found that diapause-destined pupae of the moth Helicoverpa armigera have higher levels of protein carbonylation in the brain compared to nondiapause-destined pupae. The study also showed that ROS activate Akt, which phosphorylates CREB and facilitates its nuclear import, leading to the regulation of CBR1 expression and reduction of protein carbonyl levels.
Reactive oxygen species (ROS) are considered a major cause of ageing and ageing-related diseases through protein carbonylation. Little is known about the molecular mechanisms that confer protection against ROS. Here, we observed that, compared with nondiapause-destined pupae, high protein carbonyl levels are present in the brains of diapause-destined pupae, which is a 'non-ageing' phase in the moth Helicoverpa armigera. Protein carbonyl levels respond to ROS and decrease metabolic activity to induce diapause in order to extend lifespan. However, protein carbonylation in the brains of diapause-destined pupae still occurs at a physiological level compared to young adult brains. We find that ROS activate Akt, and Akt then phosphorylates the transcription factor CREB to facilitate its nuclear import. CREB binds to the promoter of carbonyl reductase 1 (CBR1) and regulates its expression. High CBR1 levels reduce protein carbonyl levels to maintain physiological levels. This is the first report showing that the moth brain can naturally control protein carbonyl levels through a distinct ROS-Akt-CREB-CBR1 pathway to extend lifespan.
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