Sirtuin Family Modulation in Cellular Metabolism and Cancer

The sirtuin family comprises seven NAD⁺-dependent deacylases (SIRT1–SIRT7) that regulate diverse aspects of cellular metabolism, genomic stability and stress responses. By removing acetyl and other acyl groups from lysine residues on histones, transcription factors and metabolic enzymes, sirtuins coordinate the balance between energy production, redox homeostasis and DNA repair. In metabolic tissues, SIRT3 and SIRT5 act within mitochondria to control oxidative phosphorylation, reactive oxygen species detoxification and fatty-acid utilisation, while nuclear SIRT1 and SIRT6 modulate key transcriptional programmes governing gluconeogenesis, lipid biosynthesis and autophagy. In cancer, sirtuin activity influences tumour suppressor pathways, the DNA damage response and the metabolic rewiring that underpins aberrant proliferation. Loss or overexpression of individual sirtuins has been linked to altered tumour growth, metastasis and therapy resistance, highlighting their context-dependent roles. Pharmacological modulation of sirtuin activity therefore offers a dual opportunity to rectify metabolic dysfunction in chronic disease and to interfere with the metabolic vulnerabilities of cancer cells, making the sirtuin family a compelling target for translational research.

Research from Nature Portfolio

Recent studies have shown that deletion of endothelial SIRT1 in mouse models leads to paradoxical enhancement of skeletal muscle insulin sensitivity. Endothelial-specific SIRT1 deficiency impairs vascular function while promoting glucose uptake, Akt signalling and metabolic flexibility in fast-twitch muscle fibres through an autocrine mechanism involving reduced autophagy, activation of nuclear factor-κB and increased secretion of thymosin beta-4. This discovery reveals a blood-borne interorgan communication axis by which vascular SIRT1 modulation influences systemic glucose homeostasis and points to novel therapeutic strategies for metabolic disorders.

Sirtuin Family Modulation in Cellular Metabolism and Cancer publication trend

The graph below shows the total number of articles in sirtuin family modulation in cellular metabolism and cancer across all publications each year (not limited to Nature Index journals).

Technical terms

Deacetylase: Enzyme that removes acetyl groups from lysine residues on proteins, altering their function.

NAD⁺: Nicotinamide adenine dinucleotide in its oxidised form; a cofactor required for sirtuin catalytic activity.

Base excision repair: DNA repair pathway that corrects small base lesions by excising damaged nucleotides and restoring the proper base.

Autocrine mechanism: Mode of cell signalling in which a cell secretes a factor that binds to receptors on its own surface, eliciting a response.

Reactive oxygen species (ROS): Chemically reactive molecules containing oxygen that can damage cellular components if not regulated.

References

1. 2-APQC, a small-molecule activator of Sirtuin-3 (SIRT3), alleviates myocardial hypertrophy and fibrosis by regulating mitochondrial homeostasis. Signal Transduction and Targeted Therapy (2024).
2. Deficiency of endothelial sirtuin1 in mice stimulates skeletal muscle insulin sensitivity by modifying the secretome. Nature Communications (2023).
3. SIRT2 promotes base excision repair by transcriptionally activating OGG1 in an ATM/ATR-dependent manner. Nucleic Acids Research (2024).