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Redox biology and oxidative stress
Research Guide
What is Redox biology and oxidative stress?
Redox biology and oxidative stress is the study of reactive oxygen species (ROS) and redox signaling in cellular processes, including mechanisms of redox regulation, oxidative stress responses, and antioxidant systems such as thioredoxin, peroxiredoxins, glutathione catalysis, protein carbonylation, and cellular redox homeostasis.
This field encompasses 24,772 published works on the roles of ROS in physiology and pathology. Key topics include hydrogen peroxide signaling, superoxide dismutation, and mitochondrial ROS production. Antioxidant defenses like superoxide dismutase and glutathione maintain redox balance against oxidative damage.
Topic Hierarchy
Research Sub-Topics
Hydrogen Peroxide Redox Signaling
This sub-topic elucidates H2O2 as a diffusible second messenger regulating protein kinases and phosphatases. Researchers identify sensors and kinetic models for signaling specificity.
Thioredoxin Antioxidant System
This sub-topic studies the thioredoxin reductase-thioredoxin pathway in reducing disulfides and peroxiredoxins. Researchers explore its roles in apoptosis regulation and disease therapeutics.
Peroxiredoxin Redox Regulation
This sub-topic investigates peroxiredoxins as H2O2 scavengers and floodgate chaperones in redox homeostasis. Researchers analyze hyperoxidation and oligomerization mechanisms.
Glutathione Redox Homeostasis
This sub-topic covers glutathione peroxidase/glutathione reductase cycles maintaining GSH/GSSG ratios. Researchers quantify fluxes and compartment-specific regulation in stress responses.
Protein Carbonylation Mechanisms
This sub-topic examines irreversible oxidative modifications by 4-hydroxynonenal and glyoxal on proteins. Researchers develop detection methods and study functional consequences in proteostasis.
Why It Matters
Redox biology and oxidative stress influence disease processes through ROS-mediated damage and signaling. Haider Raza et al. (2013) in "Short-Term Effects of Nose-Only Cigarette Smoke Exposure on Glutathione Redox Homeostasis, Cytochrome P450 1A1/2 and Respiratory Enzyme Activities in Mice Tissues" showed that short-term cigarette smoke exposure disrupts glutathione redox homeostasis and mitochondrial functions in mouse tissues, linking it to complications from chronic smoking with 47,283 citations. Michael P. Murphy (2008) in "How mitochondria produce reactive oxygen species" explained superoxide as the primary mitochondrial ROS, contributing to oxidative damage in pathologies and retrograde redox signaling to the cytosol and nucleus. These mechanisms connect to conditions like aging, as proposed by Denham Harman (1956) in "Aging: A Theory Based on Free Radical and Radiation Chemistry," and endothelial injury from peroxynitrite, per Joseph S. Beckman et al. (1990) in "Apparent hydroxyl radical production by peroxynitrite: implications for endothelial injury from nitric oxide and superoxide."
Reading Guide
Where to Start
"Superoxide Dismutase" by Joe M. McCord and Irwin Fridovich (1969) provides the foundational purification and mechanism of a core antioxidant enzyme, offering a clear entry to ROS detoxification basics.
Key Papers Explained
Joe M. McCord and Irwin Fridovich (1969) in "Superoxide Dismutase" established the enzyme's role in superoxide dismutation, which Michael P. Murphy (2008) in "How mitochondria produce reactive oxygen species" built upon by detailing superoxide as the primary mitochondrial ROS. Wulf Dröge (2002) in "Free Radicals in the Physiological Control of Cell Function" extended this to signaling functions at moderate ROS levels, while Marián Valko et al. (2006) in "Free radicals and antioxidants in normal physiological functions and human disease" connected these to disease contexts. Haider Raza et al. (2013) in "Short-Term Effects of Nose-Only Cigarette Smoke Exposure on Glutathione Redox Homeostasis, Cytochrome P450 1A1/2 and Respiratory Enzyme Activities in Mice Tissues" applied these concepts to smoke-induced redox disruption.
Paper Timeline
Most-cited paper highlighted in red. Papers ordered chronologically.
Advanced Directions
Current frontiers emphasize ROS in redox signaling and oxidative stress, as in Michael Schieber and Navdeep S. Chandel (2014) in "ROS Function in Redox Signaling and Oxidative Stress." No recent preprints or news available, so focus remains on established mechanisms like hydrogen peroxide signaling and protein carbonylation from top papers.
Papers at a Glance
| # | Paper | Year | Venue | Citations | Open Access |
|---|---|---|---|---|---|
| 1 | Short-Term Effects of Nose-Only Cigarette Smoke Exposure on Gl... | 2013 | Cellular Physiology an... | 47.3K | ✓ |
| 2 | Free radicals and antioxidants in normal physiological functio... | 2006 | The International Jour... | 13.9K | ✕ |
| 3 | Superoxide Dismutase | 1969 | Journal of Biological ... | 12.7K | ✓ |
| 4 | Free Radicals in the Physiological Control of Cell Function | 2002 | Physiological Reviews | 9.7K | ✕ |
| 5 | Free Radicals in Biology and Medicine | 2015 | Oxford University Pres... | 8.7K | ✕ |
| 6 | Aging: A Theory Based on Free Radical and Radiation Chemistry | 1956 | Journal of Gerontology | 8.4K | ✕ |
| 7 | How mitochondria produce reactive oxygen species | 2008 | Biochemical Journal | 7.8K | ✓ |
| 8 | Apparent hydroxyl radical production by peroxynitrite: implica... | 1990 | Proceedings of the Nat... | 7.0K | ✓ |
| 9 | ROS Function in Redox Signaling and Oxidative Stress | 2014 | Current Biology | 6.4K | ✓ |
| 10 | [49] Determination of carbonyl content in oxidatively modified... | 1990 | Methods in enzymology ... | 5.8K | ✕ |
Frequently Asked Questions
What role does superoxide dismutase play in redox biology?
Superoxide dismutase catalyzes the dismutation of superoxide radicals (O2·- + O2·- + 2H+ → O2 + H2O2) and contains 2 equivalents of copper per mole of enzyme from bovine erythrocytes. Joe M. McCord and Irwin Fridovich (1969) in "Superoxide Dismutase" purified this enzyme, highlighting its function in detoxifying superoxide. The copper is reversibly removable, underscoring its role in antioxidant defense.
How does cigarette smoke affect redox homeostasis?
Short-term nose-only cigarette smoke exposure adversely affects mitochondrial functions and glutathione redox homeostasis in mouse tissues. Haider Raza et al. (2013) in "Short-Term Effects of Nose-Only Cigarette Smoke Exposure on Glutathione Redox Homeostasis, Cytochrome P450 1A1/2 and Respiratory Enzyme Activities in Mice Tissues" demonstrated impacts on cytochrome P450 1A1/2 and respiratory enzyme activities. These changes may lead to complications associated with chronic smoking.
What is the function of ROS in cell signaling?
At moderate concentrations, ROS such as nitric oxide, superoxide anion, and hydrogen peroxide serve important signaling roles in physiological control of cell function. Wulf Dröge (2002) in "Free Radicals in the Physiological Control of Cell Function" noted that high concentrations damage cellular constituents, but lower levels enable regulation. This dual nature underlies redox signaling and oxidative stress.
How do mitochondria generate reactive oxygen species?
Mitochondria produce superoxide (O2•−) as the proximal ROS, which contributes to oxidative damage and retrograde redox signaling. Michael P. Murphy (2008) in "How mitochondria produce reactive oxygen species" detailed this process in mammalian mitochondria. It underlies pathologies and signaling from mitochondria to cytosol and nucleus.
What methods detect protein carbonylation in oxidative stress?
Protein carbonylation serves as a marker of oxidative modification. Rodney L. Levine et al. (1990) in "[49] Determination of carbonyl content in oxidatively modified proteins" described a method to quantify carbonyl content in proteins. This technique aids in assessing oxidative damage in biological samples.
What is the link between free radicals and human disease?
Free radicals and antioxidants participate in normal physiological functions and contribute to human diseases. Marián Valko et al. (2006) in "Free radicals and antioxidants in normal physiological functions and human disease" reviewed their roles. Imbalances lead to oxidative stress implicated in various pathologies.
Open Research Questions
- ? How do specific ROS gradients enable precise redox signaling without causing widespread oxidative damage?
- ? What are the molecular mechanisms linking mitochondrial ROS production to nuclear gene expression changes?
- ? How do thioredoxin and peroxiredoxin systems interact with glutathione catalysis to maintain redox homeostasis under varying stress levels?
- ? What distinguishes physiological ROS concentrations from pathological ones in cellular contexts?
- ? How does protein carbonylation propagate oxidative stress signals in aging and disease?
Recent Trends
The field includes 24,772 works with no specified 5-year growth rate available.
Highly cited papers like Haider Raza et al. with 47,283 citations highlight applications to environmental exposures, while classics like Denham Harman (1956) on aging persist in influence.
2013No recent preprints or news in the last 12 months indicate steady focus on core mechanisms from top-cited works.
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