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Genomics, phytochemicals, and oxidative stress
Research Guide
What is Genomics, phytochemicals, and oxidative stress?
Genomics, phytochemicals, and oxidative stress refers to the study of genomic regulation of oxidative stress responses, particularly via the Nrf2 signaling pathway and Keap1-Nrf2-ARE pathway, and the role of phytochemicals like glucosinolates in activating antioxidant defenses against cancer, inflammation, and chemoprevention.
This field centers on Nrf2 signaling activation by oxidative stress, which regulates antioxidant gene expression through the Keap1-Nrf2-ARE pathway. It examines chemical diversity of glucosinolates and their impact on redox homeostasis, transcription regulation, and conditions like cancer and inflammation. Over 43,050 papers explore these mechanisms.
Topic Hierarchy
Research Sub-Topics
Keap1-Nrf2-ARE Pathway
This sub-topic examines the molecular interactions between Keap1, Nrf2, and the antioxidant response element (ARE) in regulating cellular responses to oxidative stress. Researchers investigate pathway activation mechanisms, post-translational modifications of Nrf2, and its role in transcriptional regulation of cytoprotective genes.
Nrf2 Activation by Phytochemicals
This area focuses on how phytochemicals, particularly glucosinolate-derived isothiocyanates, activate Nrf2 signaling to induce antioxidant defenses. Studies explore structure-activity relationships, bioavailability, and efficacy in preclinical models of oxidative stress.
Nrf2 in Cancer Chemoprevention
Researchers study Nrf2's dual role in cancer, emphasizing its protective effects against carcinogenesis through detoxification enzyme induction versus potential tumor promotion. Key investigations include Nrf2 polymorphisms, dietary modulators, and clinical correlations in cancer cohorts.
Nrf2 Regulation of Antioxidant Genes
This sub-topic covers Nrf2-mediated transcription of phase II detoxifying and antioxidant enzymes like GSTs, NQO1, and HO-1. Research delves into promoter architecture, co-activators, and epigenetic regulation under redox stress.
Nrf2 in Inflammation and Redox Signaling
Studies explore Nrf2's crosstalk with inflammatory pathways like NF-κB and its role in resolving chronic inflammation via redox-sensitive signaling. Focus includes non-canonical Nrf2 functions in immune cells and metabolic reprogramming.
Why It Matters
Research in this area identifies phytochemicals that modulate oxidative stress pathways to prevent diseases. For instance, 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 short-term cigarette smoke exposure disrupts glutathione redox homeostasis and mitochondrial functions in mice tissues, linking to chronic smoking complications. Similarly, Marián Valko et al. (2006) in "Free radicals, metals and antioxidants in oxidative stress-induced cancer" connected reactive oxygen species with cancer development, highlighting antioxidants' protective role. These findings support applications in chemoprevention and inflammation management, with glutathione S-transferases purified by William H. Habig et al. (1974) in "Glutathione S-Transferases" aiding detoxification processes.
Reading Guide
Where to Start
"Short-Term Effects of Nose-Only Cigarette Smoke Exposure on Glutathione Redox Homeostasis, Cytochrome P450 1A1/2 and Respiratory Enzyme Activities in Mice Tissues" by Haider Raza et al. (2013), as it provides concrete evidence of oxidative stress effects on redox homeostasis in a controlled model, introducing key concepts like glutathione disruption.
Key Papers Explained
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" establishes smoke-induced redox imbalance, building on William H. Habig et al. (1974) "Glutathione S-Transferases" purification of detoxification enzymes. Ron Mittler (2002) "Oxidative stress, antioxidants and stress tolerance" extends to plant antioxidants, while Wulf Dröge (2002) "Free Radicals in the Physiological Control of Cell Function" details ROS signaling roles. Marián Valko et al. (2006) "Free radicals, metals and antioxidants in oxidative stress-induced cancer" connects these to cancer mechanisms.
Paper Timeline
Most-cited paper highlighted in red. Papers ordered chronologically.
Advanced Directions
Focus persists on Nrf2 pathway modulation for chemoprevention, with no recent preprints or news in the last 12 months indicating steady maturation of core findings from top-cited works like Reuter et al. (2010) on oxidative stress-inflammation-cancer links.
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 | Glutathione S-Transferases | 1974 | Journal of Biological ... | 17.8K | ✓ |
| 3 | Oxidative stress, antioxidants and stress tolerance | 2002 | Trends in Plant Science | 10.5K | ✕ |
| 4 | Free Radicals in the Physiological Control of Cell Function | 2002 | Physiological Reviews | 9.7K | ✕ |
| 5 | The determination of flavonoid contents in mulberry and their ... | 1999 | Food Chemistry | 8.3K | ✕ |
| 6 | Free radicals, metals and antioxidants in oxidative stress-ind... | 2006 | Chemico-Biological Int... | 6.5K | ✕ |
| 7 | ROS Function in Redox Signaling and Oxidative Stress | 2014 | Current Biology | 6.4K | ✓ |
| 8 | Oxidative stress, inflammation, and cancer: How are they linked? | 2010 | Free Radical Biology a... | 5.1K | ✓ |
| 9 | Oxyl radicals, redox-sensitive signalling cascades and antioxi... | 2007 | Cellular Signalling | 4.8K | ✕ |
| 10 | Oxidative Stress and Antioxidant Defense | 2012 | World Allergy Organiza... | 4.8K | ✓ |
Frequently Asked Questions
What is the Keap1-Nrf2-ARE pathway?
The Keap1-Nrf2-ARE pathway regulates antioxidant gene expression in response to oxidative stress. Nrf2 activation leads to transcription of protective genes via antioxidant response elements. This pathway is central to redox homeostasis and chemoprevention.
How do phytochemicals like glucosinolates influence oxidative stress?
Glucosinolates, through their chemical diversity, activate Nrf2 signaling to enhance antioxidant defenses. They contribute to cancer prevention and inflammation reduction. This occurs via modulation of the Keap1-Nrf2-ARE pathway.
What role does glutathione play in oxidative stress response?
Glutathione maintains redox homeostasis and supports detoxification enzymes like glutathione S-transferases. Haider Raza et al. (2013) demonstrated its disruption by cigarette smoke in mice tissues. William H. Habig et al. (1974) purified these transferases from rat liver.
How is oxidative stress linked to cancer?
Oxidative stress generates free radicals that damage cells and promote cancer. Marián Valko et al. (2006) detailed metals and antioxidants' involvement in this process. Simone Reuter et al. (2010) linked it to inflammation pathways.
What are key methods to measure oxidative stress?
Methods include assays for glutathione redox status and enzyme activities like cytochrome P450. Jia Zhishen et al. (1999) measured flavonoid contents for superoxide scavenging in mulberry. Ron Mittler (2002) reviewed antioxidants in plant stress tolerance.
What is the current state of research on Nrf2 in inflammation?
Nrf2 regulates inflammation via antioxidant responses. Over 43,050 papers cover its role in cancer and chemoprevention. Recent focus remains on pathway modulation without new preprints.
Open Research Questions
- ? How do specific glucosinolate structures differentially activate the Keap1-Nrf2-ARE pathway across tissues?
- ? What genomic variations influence Nrf2 signaling efficiency in oxidative stress-related cancers?
- ? Can targeted phytochemical interventions restore redox homeostasis in chronic inflammation models?
- ? How does short-term oxidative stress from environmental toxins alter long-term antioxidant gene expression?
- ? What are the precise interactions between free radicals, metals, and Nrf2 in cancer initiation?
Recent Trends
The field includes 43,050 works with no specified 5-year growth rate, reflecting established research on Nrf2 and oxidative stress without new preprints or news in the last 12 months.
High-citation papers like Haider Raza et al. with 47,283 citations underscore sustained interest in redox homeostasis disruptions.
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