What this means
Aging gradually reduces the ability of cells to maintain and restore homeostasis under metabolic and oxidative stress. Sirtuin 1 (SIRT1) is an NAD+-dependent deacetylase that regulates metabolism, mitochondrial function, inflammatory signaling, and cellular stress responses.
A plain-English summary is on its way. Until then, this is the start of the authors' own summary.
- Who it was tested in
- Earlier studies
- Kind of research
- A summary of earlier studies
The science
- Original title
- SIRT1-Redox Crosstalk in Aging: Adaptive Capacity and Cellular State Transitions.
- Authors
- Yan M, Hua L, He Y et al.
- Journal
- Biology
- Published
- Oct 27, 2026
- Study type
- Review
- PMID
- 42939445 ↗
Abstract
Aging gradually reduces the ability of cells to maintain and restore homeostasis under metabolic and oxidative stress. Sirtuin 1 (SIRT1) is an NAD+-dependent deacetylase that regulates metabolism, mitochondrial function, inflammatory signaling, and cellular stress responses. Its activity depends on NAD+ availability, redox state, post-translational regulation, subcellular localization, and metabolic context, arguing against a simple linear relationship between oxidative stress, SIRT1 loss, and cellular dysfunction. SIRT1 functional reserve is defined as the remaining capacity of SIRT1-dependent processes to respond to a defined cellular demand and is placed within a broader framework of adaptive capacity and adaptive threshold. An experimental protocol with measurable readouts is described to test this framework. SIRT1-redox-mitochondrial adaptive capacity is examined under transient, repeated, and persistent stress, with attention to incomplete recovery and transitions from adaptive to compensatory and persistent dysfunctional states. Neuronal vulnerability is also considered in relation to mitochondrial dependence and proteostasis. Rather than treating SIRT1 activation as universally beneficial, strategies that restore the conditions required for appropriate SIRT1 activity are discussed. The proposed framework remains a hypothesis and requires experimental and clinical validation.
Yan M, Hua L, He Y et al. SIRT1-Redox Crosstalk in Aging: Adaptive Capacity and Cellular State Transitions. Biology. 2026. doi:10.3390/biology15201845. PMID: 42939445. https://pubmed.ncbi.nlm.nih.gov/42939445/
Related research
Two drugs together eased stroke brain damage in mice
Researchers gave mice two compounds, alone and together, after a stroke-like injury to the brain. The mice given both had less brain damage and better nerve function than those given either one alone.
Mitochondrial Quality Control in Degenerative Musculoskeletal Diseases: Signaling Networks and Therapeutic Landscapes.
Degenerative musculoskeletal disorders, including osteoarthritis (OA), intervertebral disc degeneration (IVDD), and osteoporosis (OP), are increasingly viewed as disorders of mitochondrial quality control (MQC) rather…
Targeting of Protein Persulfidation in Aging and Age-Related Disorders.
Aging is associated with a progressive loss of proteostasis and increased susceptibility to neurodegenerative and metabolic disorders.
Eye supplements that target aging pathways: a review of current evidence
This review looked at vitamins and similar products for eye diseases tied to aging. It says early signs look promising, but long-term benefit is not yet proven.
Nicotinamide Mononucleotide-Producing Probiotic Strain B12-N Attenuates Aging and Cognitive Decline in a Caenorhabditis elegans Model of Alzheimer's Disease:…
Nicotinamide mononucleotide (NMN) is an active component found in probiotics that may help alleviate Alzheimer's disease and the effects of aging.
Sirtuin-1 in Hypertension: Linking Oxidative Stress and Mitochondrial Dysfunction to Vascular Aging and Therapeutic Potential.
Hypertension is a multifactorial cardiovascular disorder characterized by oxidative stress, endothelial dysfunction, chronic inflammation, mitochondrial impairment, and accelerated vascular aging, all of which…
See all research on NAD+ boosters →