Researchers Engineered Enzyme to Restore Cellular Function
A novel Staphylococcus aureus enzyme has been developed to boost cellular NADP(H) levels and reverse signs of aging.
Updated on Oct. 14, 2026 in Life Sciences
Scientists have created a constitutively active Staphylococcus aureus NAD kinase (SaNADK) to expand mammalian NADP(H) pools. This advancement aims to restore metabolic function and reverse senescence in primary human fibroblasts.
Why it matters
The study was conducted to dissect NAD(P)H redox coupling and address metabolic decline associated with aging. By normalizing redox balance, researchers successfully reversed proliferation arrest in human cells.
Researchers utilized Escherichia coli soluble transhydrogenase to model cellular redox coupling during the study. SaNADK was specifically used to restore reductive carboxylation and de novo pyrimidine biosynthesis in human fibroblasts.
The players
Nature Metabolism
Nature Metabolism is a monthly peer-reviewed scientific journal that publishes research on metabolic and endocrine processes.
The details
The research demonstrated that while normalizing the NADH/NAD ratio is insufficient to rescue cell proliferation, increasing the NADP(H) pool directly addresses metabolic dysregulation. Hepatic SaNADK expression also showed success in reducing inflammation and metabolic dysfunction in aged male mice.
Timeline
The research article was published in Nature Metabolism on October 14, 2026.
The Big Picture
This development marks a shift in the study of NAD metabolism in aging by demonstrating that targeting the NADP(H) pool is more effective than focusing solely on the NADH/NAD ratio. It challenges the existing paradigm of how researchers approach cellular senescence and metabolic decline.
This discovery could eventually lead to new therapeutic strategies for treating age-related metabolic diseases in humans. While currently limited to laboratory models, the findings offer a potential future pathway for restoring cellular health in aging populations.
The takeaway
This research highlights the importance of redox balance in maintaining cellular proliferation and health. Future efforts will likely focus on how these enzymatic interventions might be scaled for potential clinical use.
Further reading
For additional context on breakthroughs in biological research, explore the Life Sciences section.
More information
View the original Nature Metabolism research article for comprehensive data and methodology.
Source note: This article includes information reported by Nature.
