Related Experiment Video
Updated: Aug 12, 2026

A General Method for Detecting Nitrosamide Formation in the In Vitro Metabolism of Nitrosamines by Cytochrome P450s
Published on: September 25, 2017
Mechanism of action of nickel as a carcinogen: needed information
Abstract:
It is generally accepted that cancer induction by organic compounds is a multistage process. Attempts to explain the carcinogenic action of nickel have been limited in scope, and centre around its interaction with nucleic acids, so that only one phase of the initiation process is emphasized. Other possible modes of action of nickel as a carcinogen have not received adequate attention. Classical initiation-promotion experiments employing nickel compounds as either the initiator or the promoter appear to be lacking. Also, little attention has been given to the possible indirect role of nickel as a stabilizer of free radicals formed by the oxidation of various unsaturated molecules including the dienes, cholesterol, and the well-known aromatic carcinogenic hydrocarbons. Other problems to be investigated include the role of nickel, if any, in the enhancement of the kinetics of the formation of ultimate carcinogens from the procarcinogen, or the possible inhibition of the biotransformation of active carcinogens into their inactive conjugates. It will be necessary at all times to carry out control experiments with the so-called inactive metal ions. Without experiments designed specifically to investigate the mechanism of action of nickel as a carcinogen, this topic will continue to remain in the realm of pure speculation.
Insights
Nickel
Area of Science:
- Environmental Science
- Toxicology
- Carcinogenesis
Background:
- Cancer induction is a multistage process.
- Nickel's carcinogenic mechanisms are not fully understood, with focus primarily on nucleic acid interactions.
- Other potential nickel carcinogenicity pathways require further investigation.
Purpose of the Study:
- To explore the limited scope of current research on nickel's carcinogenic action.
- To highlight the need for comprehensive studies on nickel's diverse roles in cancer initiation and promotion.
- To investigate nickel's potential indirect mechanisms, such as free radical stabilization and modulation of carcinogen metabolism.
Main Methods:
- Review of existing literature on nickel carcinogenicity.
- Identification of research gaps in understanding nickel's mechanisms of action.
- Proposal for future experimental designs, including initiation-promotion studies and investigation of nickel's role in free radical formation and carcinogen metabolism.
Main Results:
- Current understanding of nickel carcinogenicity is limited, emphasizing nucleic acid interactions.
- Classical initiation-promotion experiments with nickel compounds are lacking.
- Potential indirect roles of nickel, including free radical stabilization and metabolic modulation, are underexplored.
Conclusions:
- Further research is crucial to elucidate the complete carcinogenic mechanism of nickel.
- Experimental designs must address nickel's potential indirect roles and interactions beyond direct DNA damage.
- Control experiments with inactive metal ions are necessary for accurate mechanistic interpretation.
More Related Videos
09:33Formation of Covalent DNA Adducts by Enzymatically Activated Carcinogens and Drugs In Vitro and Their Determination by 32P-postlabeling
Published on: March 20, 2018
08:19Transfer of Manipulated Tumor-associated Neutrophils into Tumor-Bearing Mice to Study their Angiogenic Potential In Vivo
Published on: July 20, 2019
Related Concept Videos
Catalysis
Cancer Prevention
Some...
2° Amines to N-Nitrosamines: Reaction with NaNO2
Mutagenicity and Carcinogenicity
Drugs Acting on Autonomic Ganglia: Stimulants
Ganglionic stimulants activate NM nicotinic receptors in autonomic ganglia, falling into two categories: nicotine mimetics [e.g., lobeline, dimethylpiperazine, tetramethylammonium] and muscarinic receptor agonists [e.g., muscarine, methacholine]. The first category's action is rapid and blocked by nicotinic receptor antagonists, while the second category's action is delayed and blocked by atropine-like agents. Nicotine, an alkaloid, affects the heart rate by stimulating sympathetic or...
Bioactivation and Tissue Toxicity