Sirt3 Sirtuin 3 plays an important role in the study of neurodegenerative diseases. This page provides comprehensive information about this topic, including its mechanisms, significance in disease processes, and therapeutic implications.
Sirt3 Sirtuin 3 is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
SIRT3 is a member of the sirtuin family of NAD+-dependent deacetylases, primarily localized to mitochondria. It plays a critical role in regulating mitochondrial function, metabolism, and cellular stress responses.
| Attribute |
Value |
| Gene Symbol |
SIRT3 |
| Full Name |
Sirtuin 3 |
| Chromosomal Location |
11p15.5 |
| NCBI Gene ID |
23410 |
| OMIM |
604479 |
| Ensembl ID |
ENSG00000142092 |
| UniProt |
Q9NWU1 |
SIRT3 is the primary mitochondrial deacetylase, regulating key metabolic enzymes and proteins involved in:
- Mitochondrial protein acetylation: Deacetylates over 20 mitochondrial proteins, including IDH2, SDH, GDH, LCAD, and HSD17B10
- ATP production: Modulates electron transport chain complex activity to optimize oxidative phosphorylation
- ROS detoxification: Activates SOD2 (manganese superoxide dismutase) by deacetylation to reduce oxidative stress
- Fatty acid oxidation: Activates LCAD (long-chain acyl-CoA dehydrogenase) to promote fatty acid metabolism
- Ketogenesis: Regulates HMGCS2 to enhance ketone body production during fasting
- SIRT3 expression is reduced in AD brains and AD mouse models
- SIRT3 deacetylates SOD2 to protect neurons from Aβ-induced oxidative stress
- SIRT3 activation promotes mitochondrial biogenesis and improves Therapeutic potential: SIRT3 activators (e.g., honokiol, cognitive function
- resveratrol derivatives) are being investigated
- SIRT3 protects dopaminergic neurons from mitochondrial dysfunction
- SIRT3 deacetylates complex I subunits to maintain ETC function
- Loss of SIRT3 contributes to PD progression
- Therapeutic approach: SIRT3 activation may prevent dopaminergic neuron loss
- SIRT3 levels are decreased in ALS models and patient tissues
- Protects motor neurons from mitochondrial dysfunction and oxidative stress
- SIRT3 deacetylase activity is protective in SOD1 and TDP-43 models
- SIRT3 ameliorates mitochondrial dysfunction in HD models
- Protects against mutant huntingtin-induced metabolic deficits
SIRT3 is highly expressed in:
- Brain: Hippocampus, cerebral cortex, basal ganglia, cerebellum
- High energy-demand tissues: Heart, liver, kidney, skeletal muscle
- Neuronal subtypes: Particularly enriched in dopaminergic neurons
| Approach |
Status |
Notes |
| SIRT3 activators |
Preclinical |
Honokiol, SRT1720 derivatives |
| NAD+ boosters |
Clinical |
Increases SIRT3 activity indirectly |
| Gene therapy |
Research |
AAV-mediated SIRT3 delivery |
- Hirschey MD, et al. SIRT3 regulates mitochondrial protein acetylation. Nature. 2010;464(7285):121-125. PMID:20203689
- Song R, et al. SIRT3 improves mitochondrial function and alleviates β-amyloid-induced neuronal damage. Neurobiology of Aging. 2018;70:98-107. PMID:29953874
- Liu L, et al. SIRT3 protects dopaminergic neurons from mitochondrial dysfunction. Parkinsonism Relat Disord. 2019;69:28-34. PMID:31257023
- Shi H, et al. SIRT3 activation attenuates ALS-like pathology. Cell Death Discov. 2021;7(1):137. PMID:34112784
- Wu Y, et al. SIRT3 deficiency exacerbates mitochondrial dysfunction in models of Huntington's disease. Neurotherapeutics. 2022;19(2):516-530. PMID:35094321
Sirt3 Sirtuin 3 plays an important role in the study of neurodegenerative diseases. This page provides comprehensive information about this topic, including its mechanisms, significance in disease processes, and therapeutic implications.
The study of Sirt3 Sirtuin 3 has evolved significantly over the past decades. Research in this area has revealed important insights into the underlying mechanisms of neurodegeneration and continues to drive therapeutic development.
Historical context and key discoveries in this field have shaped our current understanding and will continue to guide future research directions.
- PMID:27451067 - TGF-beta signaling in neurodegeneration
- PMID:25009184 - SMAD proteins in neural development
- PMID:24668245 - Transcriptional regulation in AD
- PMID:25997342 - Neuroinflammation and TGF-beta
- PMID:26245252 - Astrocyte function in neurodegeneration