Related Experiment Video
Updated: Jun 4, 2026
09:23
Removal of Trace Elements by Cupric Oxide Nanoparticles from Uranium In Situ Recovery Bleed Water and Its Effect on Cell Viability
Published on: June 21, 2015
Arsenic: toxicity, oxidative stress and human disease
K Jomova1, Z Jenisova, M Feszterova
1Department of Chemistry, Faculty of Natural Sciences, Constantine The Philosopher University, Nitra, Slovakia.
Journal of Applied Toxicology : JAT
|February 16, 2011
Summary
Arsenic exposure causes oxidative stress and cell damage, leading to various health issues. Antioxidants like vitamin C and E can help protect against arsenic toxicity.
Area of Science:
- Environmental Science
- Toxicology
- Biochemistry
Background:
- Arsenic is a toxic metalloid found in the environment.
- Inorganic arsenic is more toxic than organic forms.
- Oxidative stress and mitochondrial damage are key to arsenic toxicity.
Purpose of the Study:
- To review the health effects of arsenic exposure.
- To discuss the mechanisms of arsenic-induced oxidative stress.
- To explore the role of antioxidants in mitigating arsenic toxicity.
Main Methods:
- Literature review of arsenic toxicology and health impacts.
- Analysis of biochemical pathways involved in oxidative stress.
- Examination of antioxidant defence mechanisms.
Main Results:
- Arsenic exposure increases reactive oxygen species (ROS) and reactive nitrogen species (RNS).
- Oxidative damage affects lipids and DNA, producing biomarkers like MDA and HNE.
- Arsenic is linked to cancer, cardiovascular, neurological, liver, kidney, and reproductive diseases.
Conclusions:
- Arsenic toxicity is mediated by oxidative stress and cellular damage.
- Antioxidant systems, including vitamins C and E, curcumin, and enzymes, offer protection.
- Understanding these mechanisms is crucial for managing arsenic-related health risks.
More Related Videos
09:33Imaging Approaches to Assessments of Toxicological Oxidative Stress Using Genetically-encoded Fluorogenic Sensors
Published on: February 7, 2018
03:35Rapid Quantification of Oxidized and Reduced Forms of Glutathione Using Ortho -phthalaldehyde in Cultured Mammalian Cells In Vitro
Published on: June 28, 2024
Related Concept Videos
01:26Toxic Reactions: Overview
When toxic substances penetrate the human body, they disseminate to various tissues, undergoing metabolic changes. This process yields reactive metabolites that may covalently bind with specific target molecules, resulting in toxicity.
Toxicity falls into two primary categories: local and systemic.
Local toxicity appears at the exposure site, such as protein denaturation caused by caustic substances.
In contrast, systemic toxicity requires the toxic agent's absorption and distribution,...
Toxicity falls into two primary categories: local and systemic.
Local toxicity appears at the exposure site, such as protein denaturation caused by caustic substances.
In contrast, systemic toxicity requires the toxic agent's absorption and distribution,...
01:36Types of Toxins
Humans continually engage with an environment rich in potentially harmful chemicals. These are introduced to our bodies through inhalation, ingestion, or skin contact. These chemicals exist in various forms, such as air and environmental pollutants, agricultural chemicals, organic solvents, and heavy metals.
Air pollutants, primarily gases, pose significant threats to respiratory health, leading to conditions like hypoxia, lung cancer, and in extreme cases, death.
Environmental pollutants like...
Air pollutants, primarily gases, pose significant threats to respiratory health, leading to conditions like hypoxia, lung cancer, and in extreme cases, death.
Environmental pollutants like...
01:24Drug Toxicity: Dose-Dependent Reactions
Drug toxicities can be stratified into pharmacological, pathological, or genotoxic based on their mechanisms. The incidence and severity of these toxicities generally increase with the drug's concentration in the body and exposure time.Pharmacological toxicity is evident when the therapeutic effects of drugs overshoot into adverse reactions in a predictable, dose-dependent manner. Central nervous system (CNS) depression from barbiturates is a classic example, with effects escalating from...
01:25Bioactivation and Tissue Toxicity
Bioactivation is a metabolic process that transforms less reactive substances into highly reactive metabolites, initiating tissue toxicity. This transformation can lead to various toxic effects, including carcinogenesis and teratogenesis. Reactive metabolites are classified into two main types: electrophiles and free radicals.Electrophiles are electron-deficient species and are produced primarily by the enzyme cytochrome P-450 during the metabolism of compounds containing carbon, nitrogen, or...
01:17Antidotes
Antidotes are medicinal substances used to counteract the harmful effects of toxins or drugs in the body. They function in various ways, each uniquely designed to combat specific toxic compounds.
Specific antidotes operate by inhibiting the enzymes that control biochemical pathways, reducing the production of harmful metabolites.
An example of an antidote is atropine, which counteracts the detrimental effects of cholinesterase inhibitors. It achieves this by deactivating muscarinic receptors,...
Specific antidotes operate by inhibiting the enzymes that control biochemical pathways, reducing the production of harmful metabolites.
An example of an antidote is atropine, which counteracts the detrimental effects of cholinesterase inhibitors. It achieves this by deactivating muscarinic receptors,...
01:00Drug Toxicity: Overview
Drug toxicity quantifies the harm a compound causes to an organism, varying by dose and potentially impacting whole systems or specific organs like the liver. Toxic reactions may arise from venomous insect or spider bites, with effects ranging from mild symptoms to severe outcomes such as brain damage or death. Common forms of acute poisoning include ethanol intoxication and overdose of pain or fever medications, with substances like GHB and heroin being particularly lethal at doses close to...