GO:0006982 response to lipid hydroperoxide: Oxidative Stress Response, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0006982 response to lipid hydroperoxide describes any cellular or organismal change triggered by lipid hydroperoxides, the reactive primary oxygenated products of polyunsaturated fatty acids.
• Lipid hydroperoxides such as linoleic acid hydroperoxide (LHPO) are detected by cells and provoke transcriptional, proteomic, and cell-cycle responses.
• In budding yeast, genome-wide transcriptional responses to LHPO occur without induction of classical oxidant defenses, revealing a distinct adaptive program.
• The glutathione peroxidase GPX4 is a central suppressor of lipid peroxidation and ferroptosis, linking GO:0006982 to cell death regulation.
• Ferrostatin-1 inhibits ferroptosis by trapping lipid radicals, directly demonstrating that lipid hydroperoxide accumulation is a causal death signal.
• Studying GO:0006982 requires integrated approaches including transcriptomics, proteomics, lipidomics, and CRISPR-based genetic models.
Description
GO:0006982 response to lipid hydroperoxide is a biological process ontology term that captures any change in state or activity of a cell or organism as a result of a lipid hydroperoxide stimulus. Lipid hydroperoxides are the highly reactive primary oxygenated products of polyunsaturated fatty acids, and they act as both damaging agents and signaling molecules that cells must sense and respond to. Because lipid hydroperoxides are central to oxidative stress and ferroptosis, understanding this response is critical for researchers in cell biology, redox biology, and disease modeling.
response to lipid hydroperoxide At A Glance
| GO ID | GO:0006982 |
|---|---|
| GO term | response to lipid hydroperoxide |
| Ontology | biological_process |
| Synonym | response to LHPO |
| Definition | Any process that results in a change in state or activity of a cell or an organism as a result of a lipid hydroperoxide stimulus; lipid hydroperoxide is the highly reactive primary oxygenated product of polyunsaturated fatty acids. |
| Major function | Cellular and organismal sensing, adaptation, and defense against lipid hydroperoxide stress, including transcriptional, proteomic, and cell-cycle responses. |
| Key stimulus | Lipid hydroperoxides such as linoleic acid hydroperoxide (LHPO). |
| Related process | Ferroptosis, an iron-dependent form of regulated cell death driven by lipid peroxidation. |
| Key regulator | Glutathione peroxidase GPX4, which prevents lipid peroxidation and ferroptosis. |
What Is GO:0006982?
In simple terms, GO:0006982 describes everything a cell does after it encounters a lipid hydroperoxide. The official definition states that it is any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a lipid hydroperoxide stimulus, where lipid hydroperoxide is the highly reactive primary oxygenated product of polyunsaturated fatty acids. This includes transcriptional reprogramming, proteomic remodeling, cell-cycle arrest, and adaptive or death responses triggered by molecules such as linoleic acid hydroperoxide.
Why Is response to lipid hydroperoxide Important in Cell Biology?
GO:0006982 is important because lipid hydroperoxides are not merely passive damage products; they are active signals that cells must interpret to survive or die. The response to lipid hydroperoxide intersects with ferroptosis, a regulated cell death pathway implicated in cancer, neurodegeneration, and ischemia-reperfusion injury. Understanding this process provides mechanistic insight into how cells maintain redox homeostasis and how dysregulation contributes to human disease.
• Lipid hydroperoxides are primary products of polyunsaturated fatty acid oxidation and are central to oxidative stress.
• The response to lipid hydroperoxide is mechanistically linked to ferroptosis, an iron-dependent cell death pathway.
• GPX4 prevents lipid peroxidation and ferroptosis, making it a key negative regulator of this response.
• Ferrostatin-1 inhibits ferroptosis by trapping lipid radicals, showing that lipid hydroperoxide accumulation is a causal death signal.
• In yeast, LHPO triggers a genome-wide transcriptional response without induction of classical oxidant defenses, revealing a distinct adaptive program.
• A specific yeast gene is required for G1 arrest in response to linoleic acid hydroperoxide, linking this response to cell-cycle control.
• Proteomic responses to linoleic acid hydroperoxide have been mapped in Saccharomyces cerevisiae, providing a resource for pathway discovery.
• Plant peroxygenases catalyze lipoxygenase-dependent epoxidation of lipid peroxides in response to abiotic stressors, showing evolutionary conservation.
• Oxidative stress-related mechanisms affect aspirin response in diabetes mellitus, connecting lipid peroxidation to clinical pharmacology.
• Studying GO:0006982 supports development of biomarkers and therapeutics targeting redox imbalance.
What Happens During response to lipid hydroperoxide?
Sensing and initial exposure to lipid hydroperoxides
In simple terms: The cell first encounters reactive lipid hydroperoxides, which can come from external sources or from internal oxidation of membrane lipids.
Lipid hydroperoxides are the highly reactive primary oxygenated products of polyunsaturated fatty acids, and they can accumulate in membranes and lipoproteins under oxidative stress. In experimental systems, cells are exposed to defined lipid hydroperoxides such as linoleic acid hydroperoxide (LHPO) to trigger the response. This initial exposure is the stimulus that defines GO:0006982, and it can originate from enzymatic or non-enzymatic lipid oxidation.
Transcriptional reprogramming
In simple terms: The cell changes which genes are turned on or off to cope with the lipid hydroperoxide.
Genome-wide transcriptional responses to a lipid hydroperoxide occur in Saccharomyces cerevisiae, and adaptation occurs without induction of classical oxidant defenses, indicating a specialized regulatory program. This transcriptional response includes changes in gene expression that are distinct from those triggered by other oxidants, highlighting the specificity of GO:0006982. The response also involves cell-cycle-related genes, as a specific yeast gene is required for G1 arrest in response to linoleic acid hydroperoxide.
Proteomic remodeling
In simple terms: The cell changes its protein composition to deal with the lipid hydroperoxide.
Proteomic analysis of Saccharomyces cerevisiae exposed to linoleic acid hydroperoxide reveals changes in protein abundance and modifications that support adaptation. These proteomic changes complement transcriptional responses and provide a functional view of the response to lipid hydroperoxide. The proteomic response includes proteins involved in stress defense, metabolism, and protein quality control.
Cell-cycle arrest and adaptive survival
In simple terms: The cell pauses its division cycle to repair damage and survive.
A Saccharomyces cerevisiae gene required for G1 arrest in response to linoleic acid hydroperoxide has been identified, demonstrating that cell-cycle checkpoint control is an integral part of GO:0006982. This G1 arrest allows cells to repair damage before committing to division. The response can be adaptive, as cells can survive and adapt to lipid hydroperoxide exposure without inducing classical oxidant defenses.
Lipid radical trapping and ferroptosis suppression
In simple terms: Cells can use radical-trapping antioxidants to stop the chain reaction of lipid peroxidation and prevent ferroptosis.
Ferrostatin-1 inhibits ferroptosis by acting as a radical-trapping antioxidant that prevents lipid peroxidation, directly linking the response to lipid hydroperoxide to cell death regulation. GPX4 prevents lipid peroxidation and ferroptosis to sustain Treg cell activation and suppression of antitumor immunity, showing that the response to lipid hydroperoxide is critical for immune cell function. Iron metabolism and lipid peroxidation are two cornerstones in the homeostasis control of ferroptosis, further integrating GO:0006982 with iron biology.
Enzymatic detoxification and epoxidation
In simple terms: Some organisms use enzymes to chemically modify lipid peroxides into less harmful products.
Rice peroxygenase catalyzes lipoxygenase-dependent regiospecific epoxidation of lipid peroxides in response to abiotic stressors, demonstrating an enzymatic route for metabolizing lipid hydroperoxides. This enzymatic activity represents a conserved strategy to detoxify or repurpose lipid peroxides during stress. Such pathways expand the repertoire of responses encompassed by GO:0006982 beyond simple antioxidant defense.
Key Genes Involved in GO:0006982 response to lipid hydroperoxide
The following genes and proteins are experimentally implicated in the response to lipid hydroperoxide or its downstream consequences.
| Gene | Major Role | Research Relevance |
|---|---|---|
| GPX4 | Glutathione peroxidase that prevents lipid peroxidation and ferroptosis | Central negative regulator of lipid hydroperoxide accumulation; target for ferroptosis research |
| Ferrostatin-1 (small molecule) | Radical-trapping antioxidant that inhibits ferroptosis | Tool compound to block lipid peroxidation and study causal roles |
| Saccharomyces cerevisiae gene required for G1 arrest | Required for G1 arrest in response to linoleic acid hydroperoxide | Model for cell-cycle checkpoint control in response to lipid hydroperoxide |
| Saccharomyces cerevisiae proteome | Proteomic response to linoleic acid hydroperoxide | Resource for identifying novel response factors |
| Rice peroxygenase | Catalyzes lipoxygenase-dependent epoxidation of lipid peroxides | Plant model for enzymatic detoxification of lipid hydroperoxides |
| Iron metabolism proteins | Regulate ferroptosis sensitivity via iron homeostasis | Link lipid peroxidation to iron biology and disease |
| Treg cell activation proteins | GPX4 sustains Treg activation and antitumor immunity | Immune cell model for lipid hydroperoxide response |
| Aspirin response proteins | Oxidative stress mechanisms affect aspirin response in diabetes | Clinical pharmacology link to lipid peroxidation |
| Lipoxygenases | Enzymes that generate lipid hydroperoxides from polyunsaturated fatty acids | Upstream producers of the stimulus for GO:0006982 |
| Glutathione system | Provides reducing equivalents for GPX4 and other peroxidases | Redox buffer that modulates the response |
| NF-E2-related factor 2 (Nrf2) pathway | Potential regulator of antioxidant genes, though classical oxidant defenses are not induced by LHPO in yeast | Context-dependent regulator of the response |
| Cell cycle checkpoint kinases | Mediate G1 arrest in response to lipid hydroperoxide | Targets for studying cell-cycle control under oxidative stress |
| Membrane repair proteins | Maintain membrane integrity during lipid peroxidation | Potential modulators of ferroptosis |
| Iron chelators (e.g., deferoxamine) | Reduce iron availability and inhibit ferroptosis | Pharmacological tools to study iron-dependent lipid peroxidation |
| Lipid radical scavengers | Terminate lipid peroxidation chain reactions | Experimental tools to block the response |
| Saccharomyces cerevisiae transcriptional regulators | Mediate genome-wide transcriptional response to LHPO | Model for dissecting regulatory networks |
| Plant stress response proteins | Respond to abiotic stressors via lipid peroxide metabolism | Comparative model for environmental stress |
| Diabetes-associated oxidative stress proteins | Modulate aspirin response under oxidative stress | Clinical model for personalized medicine |
How Is response to lipid hydroperoxide Regulated?
The response to lipid hydroperoxide is regulated at multiple levels. GPX4 acts as a key negative regulator by reducing lipid hydroperoxides and preventing ferroptosis. Ferrostatin-1 and other radical-trapping antioxidants inhibit the chain reaction of lipid peroxidation, demonstrating that the response can be pharmacologically modulated. Iron metabolism controls ferroptosis sensitivity, as iron availability determines the extent of lipid peroxidation. In yeast, the transcriptional response to LHPO occurs without induction of classical oxidant defenses, suggesting a distinct regulatory logic. Cell-cycle arrest in response to linoleic acid hydroperoxide requires a specific gene, indicating checkpoint-mediated regulation. Additionally, oxidative stress mechanisms can affect drug responses such as aspirin in diabetes mellitus, linking the response to clinical regulation.
response to lipid hydroperoxide and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| GPX4 | Ferroptosis, cancer, Treg-mediated antitumor immunity | GPX4 knockout or point-mutation cell lines; ferroptosis induction assays |
| Iron metabolism genes | Ferroptosis, neurodegeneration | Iron chelator treatment or knockout of iron transporters |
| Ferrostatin-1 target (lipid radicals) | Ferroptosis inhibition | Lipid radical trapping assays; ferroptosis rescue experiments |
| Saccharomyces cerevisiae G1 arrest gene | Cell-cycle checkpoint control | Yeast knockout and LHPO sensitivity assays |
| Rice peroxygenase | Plant abiotic stress tolerance | Rice overexpression or knockout lines; stress tolerance phenotyping |
Ferroptosis and cancer
Lipid peroxidation and iron metabolism are two cornerstones in the homeostasis control of ferroptosis, a regulated cell death pathway implicated in cancer. GPX4 prevents lipid peroxidation and ferroptosis to sustain Treg cell activation and suppression of antitumor immunity, linking the response to lipid hydroperoxide to immune evasion in cancer. Ferrostatin-1 inhibits ferroptosis by trapping lipid radicals, providing a mechanistic basis for targeting this pathway therapeutically.
Neurodegeneration and oxidative stress
Lipid hydroperoxides are highly reactive products of polyunsaturated fatty acid oxidation that contribute to oxidative stress in neurodegenerative contexts. The response to lipid hydroperoxide, including GPX4-mediated detoxification, is critical for neuronal survival. Dysregulation of iron metabolism and lipid peroxidation can promote ferroptotic cell death in neurons.
Diabetes and cardiovascular pharmacology
Oxidative stress-related mechanisms affect response to aspirin in diabetes mellitus, connecting lipid peroxidation to clinical drug response. Lipid hydroperoxides can modulate platelet function and vascular biology, contributing to cardiovascular complications. Understanding GO:0006982 may inform personalized antiplatelet therapy in diabetic patients.
Plant stress and agriculture
Rice peroxygenase catalyzes lipoxygenase-dependent regiospecific epoxidation of lipid peroxides in response to abiotic stressors, demonstrating that the response to lipid hydroperoxide is conserved in plants. This pathway is relevant for crop stress tolerance and agricultural biotechnology.
From response to lipid hydroperoxide-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Is a candidate gene required for survival under lipid hydroperoxide stress? | CRISPR knockout cell line or yeast deletion strain |
| Does a specific point mutation in GPX4 alter its anti-ferroptotic activity? | CRISPR point-mutation knock-in cell line |
| Does tagging a protein affect its localization during LHPO response? | CRISPR knock-in of fluorescent or epitope tag |
| Does overexpression of a detoxifying enzyme protect against lipid peroxidation? | CRISPR overexpression or cDNA overexpression cell line |
| Which genes mediate the transcriptional response to LHPO? | Genome-wide CRISPR library screening coupled with RNA-seq |
| Does a gene regulate G1 arrest in response to LHPO? | Yeast knockout and cell-cycle analysis |
How to Study the response to lipid hydroperoxide Process
| Method | What It Measures | Typical Application |
|---|---|---|
| RNA-seq | Genome-wide transcript abundance | Identify transcriptional response to LHPO |
| Proteomics | Protein abundance and modifications | Map proteomic response to linoleic acid hydroperoxide |
| Lipidomics (LC-MS) | Lipid hydroperoxide species and oxidized lipids | Quantify lipid peroxidation under stress |
| C11-BODIPY staining | Lipid peroxidation in live cells | Measure ferroptosis induction |
| Cell viability assay | Cell survival and death | Test ferroptosis inhibitors |
| CRISPR knockout screening | Gene essentiality under LHPO stress | Identify novel regulators of GO:0006982 |
| Yeast cell-cycle analysis | G1 arrest and cell-cycle progression | Study checkpoint response to LHPO |
| Enzyme activity assay | Peroxygenase or peroxidase activity | Measure enzymatic detoxification of lipid peroxides |
Transcriptomics and RNA-seq
Genome-wide transcriptional profiling by RNA-seq or microarray is used to identify genes differentially expressed in response to lipid hydroperoxide. In Saccharomyces cerevisiae, this approach revealed that adaptation to LHPO occurs without induction of classical oxidant defenses. RNA-seq can be combined with CRISPR knockout screens to identify regulators of the response.
Proteomics and redox proteomics
Proteomic analysis of cells exposed to linoleic acid hydroperoxide identifies changes in protein abundance and oxidative modifications. Redox proteomics can detect specific oxidized cysteine residues and protein carbonylation. These methods provide a functional view of the response beyond transcriptional changes.
Lipidomics and measurement of lipid peroxidation
Lipidomics using mass spectrometry quantifies lipid hydroperoxide species and their oxidized products. Fluorescent probes such as C11-BODIPY are used to measure lipid peroxidation in live cells. These methods are essential to confirm that a stimulus or genetic perturbation alters lipid hydroperoxide levels.
Cell viability and ferroptosis assays
Ferroptosis is measured by cell viability assays in the presence or absence of inhibitors such as ferrostatin-1. GPX4 knockout or knockdown cells are used to sensitize cells to lipid peroxidation and ferroptosis. Iron chelators and radical-trapping antioxidants are used to dissect the contribution of iron and lipid radicals.
How CRISPR Can Be Used to Study GO:0006982 response to lipid hydroperoxide
Knockout
CRISPR knockout is used to delete candidate genes such as GPX4 or yeast genes required for G1 arrest, followed by lipid hydroperoxide exposure and viability assays. Knockout of GPX4 sensitizes cells to lipid peroxidation and ferroptosis, confirming its role in the response. Genome-wide knockout libraries enable unbiased discovery of genes required for survival under LHPO stress.
Point Mutation
CRISPR point mutation introduces specific amino acid substitutions to test the function of catalytic residues or regulatory sites in proteins such as GPX4. Point mutations can dissect the enzymatic activity required for detoxifying lipid hydroperoxides. This approach is useful for modeling human disease-associated variants in genes related to lipid peroxidation.
Knock-in
CRISPR knock-in of fluorescent or epitope tags allows visualization and immunoprecipitation of proteins involved in the response to lipid hydroperoxide. Tagged knock-in cell lines can be used to monitor protein localization and interactions during LHPO exposure. Knock-in of reporter genes under the control of stress-responsive promoters enables live-cell imaging of the response.
Overexpression
CRISPR overexpression or cDNA overexpression is used to test whether increased levels of detoxifying enzymes such as peroxygenases or GPX4 protect cells from lipid hydroperoxide stress. Overexpression of rice peroxygenase in heterologous systems can enhance lipid peroxide metabolism. Overexpression models help establish sufficiency of a gene for the response.
How EDITGENE Supports response to lipid hydroperoxide Research
Researchers studying response to lipid hydroperoxide-related genes often need to determine whether a candidate gene is causally involved in sensing, detoxifying, or responding to lipid hydroperoxides. EDITGENE provides CRISPR-based cell model services to enable precise genetic perturbations for such studies.
Contact EDITGENE today to design your custom CRISPR model for response to lipid hydroperoxide research.
Frequently Asked Questions About response to lipid hydroperoxide
What is GO:0006982 response to lipid hydroperoxide?
GO:0006982 is a biological process ontology term describing any change in state or activity of a cell or organism as a result of a lipid hydroperoxide stimulus, where lipid hydroperoxide is a highly reactive primary oxygenated product of polyunsaturated fatty acids.
What genes are involved in response to lipid hydroperoxide?
Key genes include GPX4, which prevents lipid peroxidation and ferroptosis, and a Saccharomyces cerevisiae gene required for G1 arrest in response to linoleic acid hydroperoxide. Iron metabolism genes also modulate the response.
How does the cell respond to lipid hydroperoxide?
Cells respond through transcriptional reprogramming, proteomic remodeling, cell-cycle arrest, and enzymatic detoxification, as shown in yeast and other models.
What is the role of GPX4 in lipid hydroperoxide response?
GPX4 is a glutathione peroxidase that prevents lipid peroxidation and ferroptosis, thereby acting as a negative regulator of the response to lipid hydroperoxide.
How is ferroptosis related to response to lipid hydroperoxide?
Ferroptosis is an iron-dependent form of cell death driven by lipid peroxidation; ferrostatin-1 inhibits ferroptosis by trapping lipid radicals, linking the response to lipid hydroperoxide directly to cell death.
What model organisms are used to study response to lipid hydroperoxide?
Saccharomyces cerevisiae is a key model, with genome-wide transcriptional and proteomic responses mapped to linoleic acid hydroperoxide. Rice peroxygenase studies provide a plant model.
What methods are used to study GO:0006982?
Common methods include RNA-seq, proteomics, lipidomics, C11-BODIPY staining, cell viability assays, and CRISPR screens.
Can CRISPR be used to study response to lipid hydroperoxide?
Yes, CRISPR knockout, point mutation, knock-in, and overexpression models enable precise genetic dissection of the response to lipid hydroperoxide.
What diseases are linked to lipid hydroperoxide response?
Ferroptosis, cancer, neurodegeneration, and diabetes-related oxidative stress are linked to lipid hydroperoxide response and its dysregulation.
How does oxidative stress affect aspirin response in diabetes?
Oxidative stress-related mechanisms, including lipid peroxidation, can affect response to aspirin in diabetes mellitus, as shown in clinical studies.
Conclusion
GO:0006982 response to lipid hydroperoxide is a biologically and clinically significant process that integrates oxidative stress sensing, transcriptional and proteomic adaptation, cell-cycle control, and ferroptosis regulation. Key regulators such as GPX4 and experimental tools like ferrostatin-1 provide mechanistic entry points for therapeutic intervention. Continued research using CRISPR models and multi-omics approaches will further clarify how cells respond to lipid hydroperoxides in health and disease.
References
- 1. Rochette L et al.. 2022. Lipid Peroxidation and Iron Metabolism: Two Corner Stones in the Homeostasis Control of Ferroptosis.. Int J Mol Sci 24(1) PMID: 36613888
- 2. Miotto G et al.. 2020. Insight into the mechanism of ferroptosis inhibition by ferrostatin-1.. Redox Biol 28:101328 PMID: 31574461
- 3. Xu C et al.. 2021. The glutathione peroxidase Gpx4 prevents lipid peroxidation and ferroptosis to sustain Treg cell activation and suppression of antitumor immunity.. Cell Rep 35(11):109235 PMID: 34133924
- 4. O'Doherty PJ et al.. 2017. Proteomic response to linoleic acid hydroperoxide in Saccharomyces cerevisiae.. FEMS Yeast Res 17(3) PMID: 28449083
- 5. Tran AD et al.. 2023. Rice peroxygenase catalyzes lipoxygenase-dependent regiospecific epoxidation of lipid peroxides in the response to abiotic stressors.. Bioorg Chem 131:106285 PMID: 36450198
- 6. Alic N et al.. 2004. Genome-wide transcriptional responses to a lipid hydroperoxide: adaptation occurs without induction of oxidant defenses.. Free Radic Biol Med 37(1):23-35 PMID: 15183192
- 7. Alic N et al.. 2001. Identification of a Saccharomyces cerevisiae gene that is required for G1 arrest in response to the lipid oxidation product linoleic acid hydroperoxide.. Mol Biol Cell 12(6):1801-10 PMID: 11408586
- 8. Santilli F et al.. 2015. Oxidative stress-related mechanisms affecting response to aspirin in diabetes mellitus.. Free Radic Biol Med 80:101-10 PMID: 25530150
