GO:0010193 response to ozone: Pulmonary Oxidative Stress Response, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0010193 (response to ozone) is a biological_process describing any change in a cell or organism's state or activity caused by an ozone stimulus.
• Ozone exposure triggers a coordinated pulmonary response involving antioxidant enzymes, inflammatory cytokines, and airway epithelial repair mechanisms.
• The response to ozone is dose-, time-, age-, sex-, and strain-dependent, with significant inter-individual variability in pulmonary function.
• Key genes implicated include antioxidant enzymes (e.g., NQO1, HMOX1), inflammatory mediators (e.g., IL6, TNF), and hyaluronan-related factors (e.g., HABP2).
• Ozone exposure primes the immune response to subsequent stimuli such as lipopolysaccharide, linking oxidative stress to innate immune activation.
• CRISPR-based models (KO, point mutation, knock-in, overexpression) enable causal dissection of genes within the response to ozone pathway.
Description
Response to ozone (GO:0010193) is a biological process that encompasses any change in the state or activity of a cell or organism as a result of an ozone stimulus. Ozone is a major component of photochemical smog and a potent pulmonary irritant that induces oxidative stress, airway inflammation, and altered lung function in humans and animal models. Understanding this process is critical for environmental health research, as ozone exposure is associated with asthma exacerbation, chronic obstructive pulmonary disease (COPD), and increased respiratory morbidity. The response involves rapid antioxidant mobilization, cytokine release, and immune cell recruitment, with outcomes modulated by age, sex, strain, and cumulative exposure history. Transcriptional profiling of the murine airway after acute ozone exposure has revealed dynamic changes in gene expression programs that orchestrate these responses. This article synthesizes authoritative GO annotation and published literature to provide a research-grade overview of GO:0010193, its molecular players, and experimental strategies for its study.
response to ozone At A Glance
| GO ID | GO:0010193 |
|---|---|
| GO term | response to ozone |
| Ontology | biological_process |
| Synonym | None |
| Major function | Cellular and organismal response to ozone stimulus, including oxidative stress management, inflammation, and tissue repair |
| Definition source | QuickGO |
| Related stimuli | Ozone exposure via inhalation; oxidative stress; air pollution |
| Key physiological outcomes | Airway inflammation, antioxidant enzyme induction, altered pulmonary function, immune priming |
| Modulating factors | Age, sex, strain, cumulative exposure, microbiota |
What Is GO:0010193?
GO:0010193 (response to ozone) is defined as 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 an ozone stimulus. This biological_process term captures the full spectrum of physiological, cellular, and molecular reactions triggered by ozone exposure, from immediate antioxidant responses to sustained inflammatory and repair programs.
Why Is response to ozone Important in Cell Biology?
The response to ozone is a central mechanism linking environmental air pollution to respiratory and systemic disease. Ozone exposure affects millions worldwide and is associated with asthma, COPD, and cardiovascular complications. Studying GO:0010193 helps researchers identify susceptibility genes, biomarkers, and therapeutic targets for pollution-related lung injury. Furthermore, ozone-induced oxidative stress and immune priming have broader implications for understanding innate immunity and inflammatory disease mechanisms.
• Ozone is a major air pollutant with well-documented adverse effects on pulmonary function.
• The response to ozone involves oxidative stress, a shared mechanism in many inflammatory diseases.
• Age, sex, and strain differences in ozone response highlight genetic and developmental susceptibility factors.
• Ozone exposure primes the immune system, enhancing responses to subsequent bacterial stimuli.
• Cumulative ozone exposure alters nasal and airway responses, relevant to chronic pollution exposure.
• Microbiota composition influences obesity-related pulmonary responses to ozone.
• Transcriptional profiling of ozone response reveals candidate genes for environmental health research.
• Ozone therapy in clinical settings (extracorporeal blood oxygenation) demonstrates biological effects of controlled ozone exposure.
• Understanding GO:0010193 aids in developing interventions for pollution-associated respiratory diseases.
• CRISPR models enable causal testing of genes within the ozone response pathway.
What Happens During response to ozone?
Ozone Sensing and Initial Oxidative Stress
In simple terms: When ozone is inhaled, it immediately reacts with the lining of the lungs, creating harmful molecules called free radicals.
Ozone reacts with unsaturated fatty acids and antioxidants in the airway lining fluid, generating reactive oxygen species (ROS) and lipid ozonation products. This initial oxidative burst triggers rapid depletion of endogenous antioxidants such as glutathione and ascorbate, leading to cellular stress. The extent of this response varies with age, sex, and strain, as shown in neonatal rat models.
Antioxidant Enzyme Induction
In simple terms: Cells turn on protective enzymes to neutralize the harmful free radicals produced by ozone.
In response to oxidative stress, cells upregulate antioxidant enzymes including NAD(P)H quinone dehydrogenase 1 (NQO1), heme oxygenase 1 (HMOX1), and superoxide dismutase (SOD). Transcriptional profiling of murine airways after acute ozone exposure reveals coordinated induction of these cytoprotective genes. The magnitude of antioxidant response is modulated by age and sex, with neonatal rats showing differential expression compared to adults.
Inflammatory Cytokine Release and Immune Cell Recruitment
In simple terms: The damage signals attract immune cells and cause the release of molecules that promote inflammation.
Ozone exposure induces pro-inflammatory cytokines such as IL-6, TNF-alpha, and CXCL chemokines in airway epithelial cells and macrophages. This leads to neutrophil and macrophage recruitment into the lungs, a hallmark of ozone-induced airway inflammation. Hyaluronan fragments generated during ozone exposure further amplify the immune response to subsequent lipopolysaccharide (LPS) challenge, demonstrating immune priming.
Airway Epithelial Repair and Remodeling
In simple terms: After the initial damage, the lung lining tries to repair itself, which can change its structure.
Following ozone-induced injury, airway epithelial cells proliferate and migrate to restore barrier integrity. Cumulative ozone exposure can lead to persistent changes in nasal and airway epithelium, including goblet cell metaplasia and altered mucociliary function. These repair processes involve growth factors and extracellular matrix remodeling, which may contribute to chronic airway disease.
Systemic and Microbiota-Dependent Modulation
In simple terms: Gut bacteria and whole-body factors can change how the lungs react to ozone.
Microbiota composition contributes to obesity-related increases in pulmonary response to ozone, indicating that systemic factors modulate GO:0010193. Obesity alters the gut-lung axis, leading to enhanced ozone-induced inflammation in animal models. This highlights the importance of considering host-microbe interactions when studying ozone response mechanisms.
Key Genes Involved in GO:0010193 response to ozone
The following genes and proteins have been experimentally implicated in the response to ozone (GO:0010193) based on published literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| NQO1 | Antioxidant enzyme; reduces quinones and protects against oxidative stress | Upregulated in murine airway after acute ozone exposure |
| HMOX1 | Heme oxygenase 1; degrades heme to biliverdin, iron, and CO; antioxidant | Induced by ozone-induced oxidative stress |
| SOD1/2/3 | Superoxide dismutases; convert superoxide to hydrogen peroxide | Part of antioxidant defense in ozone response |
| CAT | Catalase; detoxifies hydrogen peroxide | Antioxidant response to ozone |
| IL6 | Pro-inflammatory cytokine; mediates acute phase response | Induced in airway after ozone exposure |
| TNF | Pro-inflammatory cytokine; activates immune cells | Elevated in ozone-induced inflammation |
| CXCL1/2 | Chemokines; recruit neutrophils | Upregulated in ozone-exposed lungs |
| HABP2 | Hyaluronan-binding protein 2; involved in hyaluronan fragmentation | Contributes to ozone-primed immune response |
| TLR4 | Toll-like receptor 4; recognizes LPS and hyaluronan fragments | Mediates ozone-primed immune response to LPS |
| NFE2L2 (Nrf2) | Transcription factor; master regulator of antioxidant response | Likely mediates antioxidant gene induction by ozone |
| MAPK1/3 | Mitogen-activated protein kinases; stress signaling | Activated by ozone-induced oxidative stress |
| NFKB1 | Nuclear factor kappa B; inflammatory transcription factor | Drives cytokine expression in ozone response |
| GCLC | Glutamate-cysteine ligase catalytic subunit; glutathione synthesis | Supports antioxidant defense during ozone exposure |
| GCLM | Glutamate-cysteine ligase modifier subunit; glutathione synthesis | Modulates glutathione levels in ozone response |
| GPX1 | Glutathione peroxidase 1; reduces hydrogen peroxide | Antioxidant enzyme in ozone response |
| TXN | Thioredoxin; redox regulation | Protects against ozone-induced oxidative stress |
| PRDX1 | Peroxiredoxin 1; peroxidase | Antioxidant defense in airway epithelium |
| CCL2 | Monocyte chemoattractant protein-1; recruits monocytes | Induced in ozone-exposed lungs |
How Is response to ozone Regulated?
The response to ozone is regulated at multiple levels. The transcription factor NFE2L2 (Nrf2) is a master regulator of antioxidant gene induction, controlling expression of NQO1, HMOX1, GCLC, and GCLM. Inflammatory signaling via NF-kB and MAPK pathways drives cytokine and chemokine production. Age, sex, and strain-specific factors modulate the intensity of these responses, as shown in neonatal rat studies. Additionally, microbiota-derived signals influence systemic inflammatory tone and modify pulmonary ozone responses in obesity. Cumulative exposure history also shapes the adaptive response, with repeated ozone exposure altering nasal epithelial responses.
response to ozone and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| NQO1 | Asthma, COPD; antioxidant defense | Knockout mouse; point mutation (loss of function) |
| HMOX1 | COPD, oxidative stress | Knock-in reporter; overexpression |
| IL6 | Airway inflammation, asthma | Knockout mouse; conditional KO |
| TLR4 | Immune priming, infection susceptibility | Knockout mouse; point mutation |
| HABP2 | Ozone-primed immune response | Knockout mouse; overexpression |
Asthma and Airway Hyperresponsiveness
Ozone exposure exacerbates asthma symptoms and airway hyperresponsiveness. The response to ozone involves inflammatory mediators that overlap with asthma pathogenesis, including IL-6, TNF, and chemokines. Individuals with heightened cough sensitivity show altered pulmonary function responses to ozone, suggesting shared mechanisms with airway sensory nerve activation.
Chronic Obstructive Pulmonary Disease (COPD)
Chronic ozone exposure contributes to COPD progression through persistent oxidative stress and airway remodeling. Cumulative ozone exposure leads to nasal and airway epithelial changes that may predispose to chronic obstructive disease. Antioxidant gene polymorphisms in NQO1 and HMOX1 may modify susceptibility.
Obesity-Related Pulmonary Complications
Obesity increases pulmonary response to ozone, with microbiota playing a contributory role. This interaction highlights the gut-lung axis in environmental lung disease and suggests that metabolic factors modulate GO:0010193. Obese individuals may be at higher risk for ozone-induced respiratory morbidity.
Immune Priming and Infection Susceptibility
Ozone exposure primes the innate immune system, enhancing responses to bacterial LPS via hyaluronan fragments and TLR4 signaling. This immune priming may alter susceptibility to respiratory infections and inflammatory complications. Understanding this mechanism is relevant for pollution-associated infection risk.
From response to ozone-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does NQO1 protect against ozone-induced oxidative stress? | NQO1 knockout mouse |
| What is the role of HMOX1 in ozone response? | HMOX1 overexpression or KO |
| Does TLR4 mediate ozone-primed immune response? | TLR4 point mutation knock-in |
| How does IL6 contribute to ozone-induced inflammation? | IL6 knockout mouse |
| Can antioxidant response be monitored in real time? | NQO1-tagged knock-in reporter |
| Does microbiota modulate ozone response? | Germ-free or antibiotic-treated mouse |
How to Study the response to ozone Process
| Method | What It Measures | Typical Application |
|---|---|---|
| RNA-seq | Global gene expression changes | Identify ozone-responsive genes |
| Spirometry/Plethysmography | Pulmonary function (FEV1, resistance) | Assess ozone-induced lung function changes |
| ELISA | Cytokine and chemokine levels | Quantify inflammation |
| Flow cytometry | Immune cell populations | Characterize cell recruitment |
| Glutathione assay | Antioxidant capacity | Measure oxidative stress |
| Western blot | Protein expression and activation | Validate antioxidant/inflammatory proteins |
| Histology/IHC | Tissue morphology and protein localization | Assess airway remodeling |
Transcriptional Profiling (RNA-seq)
RNA sequencing of airway epithelial cells or whole lung tissue after ozone exposure reveals global changes in gene expression, identifying antioxidant, inflammatory, and repair genes. This method has been used to characterize the murine airway response to acute ozone exposure, uncovering novel candidate genes.
Pulmonary Function Testing
Spirometry and plethysmography measure changes in lung function (e.g., FEV1, airway resistance) in response to ozone inhalation in humans and animal models. Time-course studies in healthy adult females show variable responses, highlighting individual susceptibility.
Oxidative Stress Biomarkers
Measurement of glutathione, malondialdehyde, 8-isoprostane, and antioxidant enzyme activities in bronchoalveolar lavage fluid or tissue quantifies oxidative stress induced by ozone. These biomarkers are useful for assessing the efficacy of antioxidant interventions.
Inflammatory Cell and Cytokine Profiling
Flow cytometry and ELISA are used to quantify immune cell populations (neutrophils, macrophages) and cytokine levels (IL-6, TNF, CXCL1) in lung tissue or lavage after ozone exposure. This approach characterizes the inflammatory component of GO:0010193.
How CRISPR Can Be Used to Study GO:0010193 response to ozone
Knockout
CRISPR knockout (KO) of candidate genes such as NQO1, HMOX1, or IL6 in mice or cell lines enables causal testing of their role in the response to ozone. KO models can be exposed to ozone and assessed for oxidative stress, inflammation, and lung function changes.
Point Mutation
Point mutations can be introduced to model human polymorphisms in antioxidant genes (e.g., NQO1, HMOX1) that may alter ozone susceptibility. These models help determine whether specific variants affect the response to ozone.
Knock-in
Knock-in of reporter tags (e.g., GFP, luciferase) into endogenous loci such as NQO1 or HMOX1 allows real-time monitoring of antioxidant gene expression during ozone exposure. This approach provides dynamic insights into the kinetics of GO:0010193.
Overexpression
CRISPR activation (CRISPRa) or transgenic overexpression of protective genes (e.g., HMOX1, SOD) can test whether enhancing antioxidant capacity mitigates ozone-induced injury. Overexpression models are useful for preclinical target validation.
How EDITGENE Supports response to ozone Research
Researchers studying response to ozone-related genes often need to determine whether a candidate gene is causally involved in the oxidative, inflammatory, or repair processes triggered by ozone exposure. EDITGENE provides comprehensive CRISPR-based services to generate precisely engineered cell and animal models, enabling rigorous functional studies of GO:0010193.
Contact EDITGENE today to design your custom CRISPR model for response to ozone research.
Frequently Asked Questions About response to ozone
What is GO:0010193?
GO:0010193 is the Gene Ontology term for response to ozone, defined as any process that results in a change in state or activity of a cell or an organism as a result of an ozone stimulus.
What genes are involved in response to ozone?
Key genes include NQO1, HMOX1, SOD, CAT, IL6, TNF, CXCL1, HABP2, TLR4, and NFE2L2, among others.
How does ozone cause lung inflammation?
Ozone reacts with airway lining fluid to generate reactive oxygen species, which activate antioxidant and inflammatory pathways, leading to cytokine release and immune cell recruitment.
What is the role of Nrf2 in ozone response?
NFE2L2 (Nrf2) is a transcription factor that regulates antioxidant gene expression, including NQO1 and HMOX1, in response to ozone-induced oxidative stress.
Does ozone exposure affect immune response to bacteria?
Yes, ozone exposure primes the immune system via hyaluronan fragments and TLR4 signaling, enhancing responses to subsequent bacterial lipopolysaccharide.
How is response to ozone studied in the lab?
Common methods include RNA-seq, pulmonary function tests, cytokine ELISAs, oxidative stress biomarkers, and CRISPR knockout models.
What are the health effects of ozone exposure?
Ozone exposure is associated with asthma exacerbation, COPD, reduced lung function, and increased respiratory morbidity.
Does obesity affect ozone response?
Yes, obesity-related increases in pulmonary response to ozone are partly mediated by microbiota.
What is the difference between acute and chronic ozone exposure?
Acute exposure causes rapid oxidative stress and inflammation, while chronic exposure leads to persistent airway remodeling and altered responses.
Can CRISPR be used to study response to ozone genes?
Yes, CRISPR knockout, knock-in, and overexpression models enable causal testing of genes involved in GO:0010193.
Conclusion
GO:0010193 (response to ozone) is a critical biological process linking environmental ozone exposure to oxidative stress, inflammation, and respiratory disease. Research using transcriptional profiling, functional assays, and CRISPR models has identified key genes such as NQO1, HMOX1, IL6, and TLR4 that mediate these responses. Understanding the mechanisms of ozone response is essential for developing interventions against pollution-associated lung diseases. EDITGENE provides comprehensive CRISPR services to accelerate functional studies of GO:0010193.
References
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- 3. Tovar A et al.. 2020. Transcriptional Profiling of the Murine Airway Response to Acute Ozone Exposure.. Toxicol Sci 173(1):114-130 PMID: 31626304
- 4. Folinsbee LJ et al.. 2000. Time course of response to ozone exposure in healthy adult females.. Inhal Toxicol 12(3):151-67 PMID: 10715622
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- 6. Dye JA et al.. 2017. Neonatal rat age, sex and strain modify acute antioxidant response to ozone.. Inhal Toxicol 29(7):291-303 PMID: 28880688
- 7. Li Z et al.. 2010. Hyaluronan fragments contribute to the ozone-primed immune response to lipopolysaccharide.. J Immunol 185(11):6891-8 PMID: 21037098
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