GO:0042180 ketone metabolic process: Metabolic Pathway, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0042180 ketone metabolic process describes the chemical reactions and pathways involving ketone bodies such as beta-hydroxybutyrate and acetoacetate, which serve as alternative fuels and signaling molecules.
• Ketone metabolism is essential for skeletal and cardiac muscle metabolic remodeling, especially during intermittent time-restricted feeding and heart failure.
• BDH1 catalyzes the interconversion of acetoacetate and beta-hydroxybutyrate, and its flux supports muscle adaptation to nutritional states.
• Inhibiting skeletal muscle ketone oxidation can alleviate hyperglycemia in diet-induced obesity, highlighting ketone metabolism as a therapeutic target.
• SGLT2 inhibition alters cardiac substrate utilization and mitochondrial redox, partly through effects on ketone metabolism.
• Ketone esters can blunt semaglutide-induced loss of skeletal muscle mass, suggesting clinical potential for ketone-based interventions.
Description
Ketone metabolic process (GO:0042180) encompasses the biochemical reactions and pathways that produce, interconvert, and utilize ketone bodies, primarily acetoacetate, beta-hydroxybutyrate, and acetone, as carried out by individual cells. These water-soluble molecules are synthesized in the liver from fatty acids during periods of low carbohydrate availability, such as fasting, ketogenic diets, or prolonged exercise, and are then released into the circulation to be oxidized by extrahepatic tissues including skeletal muscle, heart, and brain. The importance of ketone metabolism extends beyond energy provision; ketone bodies act as signaling metabolites that influence gene expression, oxidative stress, and inflammation, making this pathway a focal point for understanding metabolic flexibility and disease. Researchers study GO:0042180 to dissect how cells adapt to nutritional and pathological stress, and to identify therapeutic targets for diabetes, heart failure, and obesity.
ketone metabolic process At A Glance
| GO ID | GO:0042180 |
|---|---|
| GO term | ketone metabolic process |
| Ontology | biological_process |
| Synonym | ketone metabolism |
| Major function | Production, interconversion, and utilization of ketone bodies for energy and signaling |
| Key enzymes | BDH1, OXCT1, ACAT1, HMGCS2, HMGCL |
| Tissue distribution | Liver (synthesis), skeletal muscle, heart, brain (oxidation) |
| Related pathways | Fatty acid oxidation, TCA cycle, ketogenesis, ketolysis |
| Disease relevance | Heart failure, diabetes, obesity, metabolic syndrome |
What Is GO:0042180?
According to the Gene Ontology, GO:0042180 ketone metabolic process is defined as the chemical reactions and pathways involving any of a class of organic compounds that contain the carbonyl group, CO, and in which the carbonyl group is bonded only to carbon atoms, as carried out by individual cells. The general formula for a ketone is RCOR, where R and R are alkyl or aryl groups. In practice, this term covers the synthesis, interconversion, and breakdown of ketone bodies such as acetoacetate and beta-hydroxybutyrate, which are central to energy homeostasis.
Why Is ketone metabolic process Important in Cell Biology?
Ketone metabolic process is critical for metabolic flexibility, allowing cells to survive and function when glucose is scarce. In the heart, ketone bodies become a major fuel source in heart failure, and their metabolism is linked to mitochondrial redox balance and cardiac efficiency. In skeletal muscle, ketone oxidation supports remodeling in response to intermittent time-restricted feeding, and its inhibition can improve hyperglycemia in obesity. Moreover, ketone esters show promise in preserving muscle mass during semaglutide treatment, underscoring the translational relevance of this pathway.
• Provides alternative energy substrate during fasting, ketogenic diets, and exercise.
• Supports cardiac function and metabolic remodeling in heart failure.
• Regulates skeletal muscle mass and glucose homeostasis in obesity and diabetes.
• Influences mitochondrial redox state and oxidative stress.
• Acts as signaling molecules affecting gene expression and inflammation.
• Target for SGLT2 inhibitors and other metabolic therapies.
• Involved in ferroptosis regulation through ketone-related pathways.
• Relevant to biocatalytic synthesis of chiral amines from ketones.
• Potential to mitigate muscle wasting during GLP-1 receptor agonist therapy.
• Key to understanding intermittent time-restricted feeding benefits.
What Happens During ketone metabolic process?
Ketogenesis
In simple terms: The liver makes ketone bodies from fat when glucose is low.
Ketogenesis primarily occurs in liver mitochondria, where acetyl-CoA derived from fatty acid oxidation is converted to acetoacetate via HMGCS2 and HMGCL. Acetoacetate is then reduced to beta-hydroxybutyrate by BDH1 or spontaneously decarboxylates to acetone. This process is upregulated during fasting, ketogenic diets, or untreated diabetes, providing fuel for extrahepatic tissues.
Ketone transport and uptake
In simple terms: Ketone bodies travel through the blood to other tissues.
Once synthesized, ketone bodies are released into the circulation and taken up by tissues such as skeletal muscle, heart, and brain via monocarboxylate transporters. Uptake is regulated by substrate availability and hormonal signals, and is essential for distributing energy during carbohydrate restriction.
Ketolysis
In simple terms: Tissues break down ketone bodies to make energy.
In extrahepatic tissues, beta-hydroxybutyrate is oxidized back to acetoacetate by BDH1, and acetoacetate is activated to acetoacetyl-CoA by OXCT1 (SCOT). Acetoacetyl-CoA is then cleaved by ACAT1 into two acetyl-CoA molecules, which enter the TCA cycle for ATP production. This pathway is critical for cardiac and skeletal muscle energy metabolism.
Regulation by nutritional and hormonal signals
In simple terms: Insulin and other hormones control how fast ketones are made and used.
Insulin suppresses ketogenesis, while glucagon and low glucose promote it. During intermittent time-restricted feeding, ketone flux through BDH1 supports metabolic remodeling of skeletal and cardiac muscles. SGLT2 inhibition alters substrate utilization and mitochondrial redox, partly by modulating ketone oxidation.
Ketone bodies as signaling molecules
In simple terms: Ketones can also send signals that change how cells behave.
Beyond energy, beta-hydroxybutyrate acts as an endogenous inhibitor of histone deacetylases and a ligand for G-protein coupled receptors, influencing oxidative stress and inflammation. These signaling roles link ketone metabolism to cardiovascular protection and metabolic regulation.
Key Genes Involved in GO:0042180 ketone metabolic process
The following genes and proteins are central to ketone metabolic process, based on published literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| BDH1 | Interconverts acetoacetate and beta-hydroxybutyrate | Supports muscle metabolic remodeling during time-restricted feeding |
| OXCT1 | Catalyzes acetoacetyl-CoA formation from acetoacetate | Rate-limiting for ketone oxidation in extrahepatic tissues |
| ACAT1 | Cleaves acetoacetyl-CoA into two acetyl-CoA | Essential for ketone utilization in mitochondria |
| HMGCS2 | Rate-limiting enzyme of ketogenesis | Controls ketone body production in liver |
| HMGCL | Cleaves HMG-CoA to acetoacetate | Final step of ketogenesis |
| SLC16A1 | Monocarboxylate transporter 1 | Mediates ketone body uptake |
| SLC16A7 | Monocarboxylate transporter 2 | Facilitates ketone transport in muscle and heart |
| PPARA | Regulates fatty acid oxidation and ketogenesis | Transcriptional control of ketone metabolism |
| FOXO1 | Transcription factor promoting ketogenesis | Mediates fasting response |
| PGC1A | Coactivator of mitochondrial biogenesis | Enhances ketone oxidation capacity |
| INS | Insulin | Suppresses ketogenesis |
| GCG | Glucagon | Stimulates ketogenesis |
| SGLT2 | Sodium-glucose cotransporter 2 | Inhibition alters ketone utilization |
| GLP1R | GLP-1 receptor | Semaglutide effects on muscle mass and ketones |
| AMPK | Energy sensor kinase | Regulates ketone metabolism in response to energy stress |
| SIRT1 | NAD+-dependent deacetylase | Modulates ketogenic gene expression |
| mTOR | Growth and metabolism regulator | Integrates nutrient signals with ketone use |
How Is ketone metabolic process Regulated?
Ketone metabolic process is tightly regulated by nutritional and hormonal signals. Insulin suppresses ketogenesis, whereas glucagon, cortisol, and low glucose stimulate it. The transcription factors PPARA and FOXO1 promote the expression of ketogenic enzymes such as HMGCS2 and BDH1. AMPK and SIRT1 sense energy status and modulate ketone oxidation capacity. In heart failure, SGLT2 inhibition shifts substrate utilization toward ketones and improves mitochondrial redox. Additionally, intermittent time-restricted feeding enhances ketone flux through BDH1, supporting muscle remodeling.
ketone metabolic process and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| BDH1 | Heart failure, muscle remodeling | Cardiac-specific knockout mouse |
| OXCT1 | Hyperglycemia, obesity | Skeletal muscle knockout |
| SGLT2 | Heart failure, diabetes | SGLT2 inhibitor treatment in rat models |
| GLP1R | Muscle wasting, obesity | Semaglutide with ketone esters in mice |
| ACAT1 | Ketone utilization disorders | Liver-specific knockout |
Heart Failure
In heart failure, the failing heart increases ketone body oxidation, which can improve energy efficiency but may also contribute to mitochondrial redox imbalance. SGLT2 inhibitors alter ketone metabolism and mitochondrial redox in both healthy and failing rat hearts. Myocardial ketone metabolism is therefore a therapeutic target in heart failure.
Diabetes and Obesity
Inhibiting skeletal muscle ketone oxidation with pimozide alleviates hyperglycemia in diet-induced obesity, suggesting that excessive ketone use contributes to glucose dysregulation. Ketone esters can blunt semaglutide-induced loss of skeletal muscle mass, offering a strategy to preserve muscle in diabetes treatment.
Cancer and Ferroptosis
Imidazole ketone erastin induces ferroptosis and slows tumor growth in a mouse lymphoma model, linking ketone-related compounds to cancer cell death pathways. This highlights the potential of targeting ketone metabolism in oncology.
From ketone metabolic process-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does BDH1 flux support muscle remodeling? | BDH1 knockout mouse with intermittent time-restricted feeding |
| Can inhibiting ketone oxidation improve hyperglycemia? | OXCT1 knockout or pimozide treatment in obese mice |
| How does SGLT2 inhibition affect cardiac ketone use? | SGLT2 inhibitor in healthy and failing rat hearts |
| Do ketone esters preserve muscle mass? | Semaglutide-treated mice with ketone ester co-administration |
| What is the role of ketone metabolism in ferroptosis? | Imidazole ketone erastin in lymphoma mouse model |
| How does ketogenesis regulate fasting? | Liver-specific HMGCS2 knockout |
How to Study the ketone metabolic process Process
| Method | What It Measures | Typical Application |
|---|---|---|
| 13C metabolic flux analysis | Ketone oxidation and interconversion rates | Cardiac and skeletal muscle metabolism |
| RNA-seq | Expression of ketogenic/ketolytic genes | Nutritional state studies |
| LC-MS metabolomics | Ketone body concentrations | Heart failure and diabetes models |
| Western blot | Protein levels of BDH1, OXCT1 | Muscle remodeling |
| CRISPR knockout | Loss-of-function effects | Causal gene validation |
| Seahorse assay | Mitochondrial respiration with ketones | Metabolic flexibility |
| ChIP-seq | Transcription factor binding at ketogenic promoters | PPARA/FOXO1 regulation |
| Histone acetylation assays | Beta-hydroxybutyrate signaling | Epigenetic regulation |
Metabolic Flux Analysis
Isotope tracing with 13C-labeled ketone bodies or fatty acids can quantify ketone flux through BDH1 and OXCT1 in cells and tissues. This method reveals real-time metabolic remodeling.
Gene Expression Profiling
RNA-seq and qPCR can measure expression of ketogenic and ketolytic genes such as HMGCS2, BDH1, and OXCT1 under different nutritional states.
Proteomics and Metabolomics
Mass spectrometry-based metabolomics quantifies ketone body levels, while proteomics assesses enzyme abundance and post-translational modifications.
Genetic Knockout Models
CRISPR-Cas9 knockout of BDH1, OXCT1, or HMGCS2 in mice or cell lines allows causal testing of ketone metabolism in disease models.
How CRISPR Can Be Used to Study GO:0042180 ketone metabolic process
Knockout
CRISPR knockout of BDH1, OXCT1, or HMGCS2 enables loss-of-function studies to determine their causal roles in ketone metabolism, muscle remodeling, and hyperglycemia.
Point Mutation
Introducing point mutations in catalytic residues of BDH1 or OXCT1 can dissect enzymatic mechanisms and identify residues critical for substrate binding.
Knock-in
Knock-in of fluorescent tags or epitope tags at endogenous loci allows real-time tracking of ketone enzymes in live cells and tissues.
Overexpression
Overexpression of BDH1 or HMGCS2 in cell lines or mice can enhance ketone oxidation or production, testing sufficiency in metabolic disease models.
How EDITGENE Supports ketone metabolic process Research
Researchers studying ketone metabolic process-related genes often need to determine whether a candidate gene is causally involved in metabolic remodeling, disease progression, or therapeutic response. EDITGENE provides comprehensive CRISPR-based services to accelerate this discovery.
Contact EDITGENE today to design your custom CRISPR model for ketone metabolic process research.
Frequently Asked Questions About ketone metabolic process
What is ketone metabolic process?
Ketone metabolic process (GO:0042180) encompasses the biochemical reactions and pathways involving ketone bodies such as acetoacetate and beta-hydroxybutyrate, as carried out by individual cells.
What genes are involved in ketone metabolic process?
Key genes include BDH1, OXCT1, ACAT1, HMGCS2, HMGCL, and transporters like SLC16A1.
How is ketone metabolism regulated?
It is regulated by insulin, glucagon, PPARA, FOXO1, AMPK, and SIRT1 in response to nutritional status.
What is the role of BDH1 in ketone metabolism?
BDH1 interconverts acetoacetate and beta-hydroxybutyrate, supporting muscle metabolic remodeling during intermittent time-restricted feeding.
Can ketone metabolism be targeted for heart failure?
Yes, SGLT2 inhibition alters cardiac ketone utilization and mitochondrial redox, and ketone metabolism is a therapeutic target in heart failure.
How does ketone metabolism affect diabetes?
Inhibiting skeletal muscle ketone oxidation alleviates hyperglycemia in diet-induced obesity, and ketone esters can preserve muscle mass during semaglutide treatment.
What methods are used to study ketone metabolic process?
Common methods include 13C metabolic flux analysis, RNA-seq, LC-MS metabolomics, and CRISPR knockout models.
What is the link between ketone metabolism and ferroptosis?
Imidazole ketone erastin induces ferroptosis and slows tumor growth in a mouse lymphoma model, linking ketone-related compounds to cancer cell death.
How can CRISPR be used to study ketone metabolism?
CRISPR knockout, point mutation, knock-in, and overexpression models enable causal testing of genes like BDH1 and OXCT1 in metabolic diseases.
What are ketone bodies?
Ketone bodies are water-soluble molecules including acetoacetate, beta-hydroxybutyrate, and acetone, produced mainly in the liver and used as alternative fuels.
Conclusion
Ketone metabolic process (GO:0042180) is a fundamental biological pathway that enables cellular adaptation to nutritional stress and contributes to metabolic health and disease. From cardiac energetics to skeletal muscle remodeling and cancer biology, ketone metabolism offers numerous therapeutic opportunities. Leveraging CRISPR-based models and advanced bioinformatics, researchers can dissect the precise roles of ketone enzymes and transporters, paving the way for novel interventions in heart failure, diabetes, and obesity.
References
- 1. Williams AS et al.. 2024. Ketone flux through BDH1 supports metabolic remodeling of skeletal and cardiac muscles in response to intermittent time-restricted feeding.. Cell Metab 36(2):422-437.e8 PMID: 38325337
- 2. Savile CK et al.. 2010. Biocatalytic asymmetric synthesis of chiral amines from ketones applied to sitagliptin manufacture.. Science 329(5989):305-9 PMID: 20558668
- 3. Zhang Y et al.. 2019. Imidazole Ketone Erastin Induces Ferroptosis and Slows Tumor Growth in a Mouse Lymphoma Model.. Cell Chem Biol 26(5):623-633.e9 PMID: 30799221
- 4. Lopaschuk GD et al.. 2023. Ketones and the cardiovascular system.. Nat Cardiovasc Res 2(5):425-437 PMID: 39196044
- 5. Al Batran R et al.. 2020. Pimozide Alleviates Hyperglycemia in Diet-Induced Obesity by Inhibiting Skeletal Muscle Ketone Oxidation.. Cell Metab 31(5):909-919.e8 PMID: 32275862
- 6. Goedeke L et al.. 2024. SGLT2 inhibition alters substrate utilization and mitochondrial redox in healthy and failing rat hearts.. J Clin Invest 134(24) PMID: 39680452
- 7. Karwi QG et al.. 2020. Myocardial Ketones Metabolism in Heart Failure.. J Card Fail 26(11):998-1005 PMID: 32442517
- 8. Abuetabh Y et al.. 2026. Semaglutide-induced loss of skeletal muscle mass is blunted by co-administration of ketone esters.. JCI Insight 11(15) PMID: 42262870
