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Trace Elements in Health
Research Guide
What is Trace Elements in Health?
Trace elements in health refers to the physiological roles, molecular mechanisms, homeostasis, toxicity, and clinical implications of essential metals such as copper, zinc, selenium, and iron in preventing oxidative stress, supporting antioxidant defenses, immune function, and neurological health.
This field encompasses 89,239 papers on copper, zinc, selenium, and iron in relation to oxidative stress, antioxidants like glutathione peroxidase, metallothionein, neurological disorders, homeostasis, toxicity, immune function, and nutrition. Key works address metal-induced reactive oxygen species formation causing DNA damage, lipid peroxidation, and altered homeostasis, as in 'Metals, Toxicity and Oxidative Stress' (2005) and 'Oxidative mechanisms in the toxicity of metal ions' (1995). Research also covers iron regulation via hepcidin and ferroportin, with implications for overload and anemia.
Topic Hierarchy
Research Sub-Topics
Copper Homeostasis in Neurological Disorders
This sub-topic examines the dysregulation of copper transport and storage proteins like ceruloplasmin and ATP7B in neurodegenerative diseases such as Alzheimer's and Parkinson's. Researchers investigate molecular mechanisms linking copper imbalance to amyloid aggregation and tau hyperphosphorylation.
Zinc and Oxidative Stress in Immune Function
This area explores how zinc modulates reactive oxygen species production and antioxidant enzyme activity in immune cells during inflammation and infection. Studies focus on zinc finger proteins and signaling pathways influencing T-cell activation and cytokine release.
Metallothionein in Copper and Zinc Detoxification
Researchers study the induction and function of metallothioneins as cytosolic buffers that sequester excess copper and zinc to prevent cellular toxicity. This includes transcriptional regulation by metal-responsive transcription factor-1 (MTF-1) and roles in heavy metal tolerance.
Dietary Copper and Zinc in Cardiovascular Health
This sub-topic investigates how nutritional levels of copper and zinc influence endothelial function, lipid peroxidation, and atherosclerosis progression. Clinical trials and cohort studies assess optimal intake ratios for preventing ischemic heart disease.
Copper-Zinc Superoxide Dismutase in Amyotrophic Lateral Sclerosis
Focuses on mutations in the SOD1 gene encoding Cu/Zn superoxide dismutase and their contributions to motor neuron degeneration in ALS. Research covers protein misfolding, aggregation, and mitochondrial dysfunction triggered by SOD1 anomalies.
Why It Matters
Trace elements influence health through antioxidant protection and toxicity risks; for example, selenium as a glutathione peroxidase component protects hemoglobin from oxidative damage in selenium-deficient erythrocytes, as shown by Rotruck et al. (1973). Copper and zinc imbalances contribute to oxidative stress-linked diseases, with Valko et al. (2005) detailing metal-mediated free radical formation causing DNA base modifications, lipid peroxidation, and sulfhydryl group alterations. Iron homeostasis is regulated by hepcidin binding to ferroportin, preventing overload or inflammation-induced anemia (Nemeth et al., 2004), with direct applications in nutrition, neurology, and clinical management of deficiencies or toxicities.
Reading Guide
Where to Start
'Selenium: Biochemical Role as a Component of Glutathione Peroxidase' by Rotruck et al. (1973) because it provides a foundational experiment showing selenium's direct role in protecting against oxidative damage, introducing core concepts of trace elements in antioxidant defense.
Key Papers Explained
'Metals, Toxicity and Oxidative Stress' by Valko et al. (2005) reviews reactive oxygen species from metals causing DNA and lipid damage, building on 'Oxidative mechanisms in the toxicity of metal ions' by Stohs and Bagchi (1995) which details ion-specific pathways; 'Hepcidin Regulates Cellular Iron Efflux by Binding to Ferroportin and Inducing Its Internalization' by Nemeth et al. (2004) extends this to iron homeostasis mechanisms; 'Selenium: Biochemical Role as a Component of Glutathione Peroxidase' by Rotruck et al. (1973) connects to selenium's protective enzyme role.
Paper Timeline
Most-cited paper highlighted in red. Papers ordered chronologically.
Advanced Directions
Current research emphasizes copper-zinc homeostasis, metallothionein regulation, and links to immune function and neurological disorders, as no recent preprints are available but the 89,239 papers sustain focus on molecular-clinical translation.
Papers at a Glance
| # | Paper | Year | Venue | Citations | Open Access |
|---|---|---|---|---|---|
| 1 | Ferroptosis: An Iron-Dependent Form of Nonapoptotic Cell Death | 2012 | Cell | 16.8K | ✓ |
| 2 | Identification of programmed cell death in situ via specific l... | 1992 | The Journal of Cell Bi... | 9.5K | ✓ |
| 3 | Selenium: Biochemical Role as a Component of Glutathione Perox... | 1973 | Science | 7.7K | ✕ |
| 4 | A person centered work psychology: changing paradigms by broad... | 1996 | Institutional Research... | 5.4K | ✓ |
| 5 | Prions | 1998 | Proceedings of the Nat... | 5.3K | ✕ |
| 6 | Metals, Toxicity and Oxidative Stress | 2005 | Current Medicinal Chem... | 4.9K | ✕ |
| 7 | Caspases: the executioners of apoptosis | 1997 | Biochemical Journal | 4.7K | ✓ |
| 8 | Hepcidin Regulates Cellular Iron Efflux by Binding to Ferropor... | 2004 | Science | 4.7K | ✕ |
| 9 | The precursor of Alzheimer's disease amyloid A4 protein resemb... | 1987 | Nature | 4.6K | ✕ |
| 10 | Oxidative mechanisms in the toxicity of metal ions | 1995 | Free Radical Biology a... | 4.2K | ✕ |
Frequently Asked Questions
What role does selenium play in antioxidant defense?
Selenium serves as a biochemical component of glutathione peroxidase, which protects hemoglobin from oxidative damage by H2O2 or ascorbate in erythrocytes. In selenium-deficient rats, hemolyzates fail to maintain glutathione protection, leading to hemoglobin oxidation (Rotruck et al., 1973). This enzyme activity is absent in deficient cells, highlighting selenium's essential role in redox homeostasis.
How do metals induce oxidative stress?
Metals generate reactive oxygen and nitrogen species, causing DNA base modifications, lipid peroxidation, and disruptions in calcium and sulfhydryl homeostasis. Valko et al. (2005) reviewed metal toxicity leading to carcinogenicity through free radical formation. Stohs and Bagchi (1995) detailed oxidative mechanisms in metal ion toxicity.
What is the mechanism of iron regulation by hepcidin?
Hepcidin binds to ferroportin, the cellular iron exporter, inducing its internalization and degradation to regulate iron efflux. This prevents tissue iron overload during high hepcidin states from iron loading or inflammation (Nemeth et al., 2004). Decreased hepcidin results in overload, while excess causes hypoferremia and anemia of inflammation.
How do trace elements relate to neurological disorders?
Copper and zinc influence neurological health via homeostasis, metallothionein, and oxidative stress pathways. Papers in this field link metal dyshomeostasis to neurodegeneration, as explored in the cluster's focus on molecular mechanisms. Toxicity from metals like iron contributes via oxidative damage (Valko et al., 2005).
What are the clinical implications of copper and zinc in health?
Copper and zinc support immune function, antioxidant properties, and nutrition but cause toxicity through oxidative stress when imbalanced. The field examines their roles in disease prevention and homeostasis. Key papers address metallothionein-mediated regulation and neurological impacts.
Open Research Questions
- ? How do interactions between copper, zinc, and iron specifically modulate metallothionein expression in response to oxidative stress?
- ? What molecular pathways link trace element dyshomeostasis to specific neurological disorders beyond general oxidative damage?
- ? How can nutritional interventions precisely balance trace element levels to mitigate toxicity while supporting immune function?
- ? What are the thresholds for copper and zinc toxicity in relation to antioxidant enzyme activities like glutathione peroxidase?
Recent Trends
The field maintains 89,239 works with sustained interest in copper, zinc, oxidative stress, and homeostasis, as no growth rate data or recent preprints/news indicate stable exploration of toxicity, antioxidants, and nutrition without specified shifts.
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