Related Experiment Video
Updated: Aug 12, 2026
Using Mouse Mammary Tumor Cells to Teach Core Biology Concepts: A Simple Lab Module
Published on: June 18, 2015
Blocking and suppressing mechanisms of chemoprevention by dietary constituents
M M Manson1, A Gescher, E A Hudson
1MRC Toxicology Unit, CMHT Hodgkin Building, University of Leicester, Lancaster Road, PO Box 138, Leicester, UK. mmm2@le.ac.uk
Abstract:
Many dietary constituents are chemopreventive in animal models, and experiments with cultured cells are revealing various potential mechanisms of action. Compounds classified as blocking agents can prevent, or greatly reduce, initiation of carcinogenesis, while suppressing agents affect later stages of the process by reducing cell proliferation. Many compounds have both types of activity. Blocking mechanisms include alteration of drug metabolising activities and scavenging of reactive oxygen species. Mechanisms which suppress tumorigenesis often involve modulation of signal transduction pathways, leading to altered gene expression, cell cycle arrest or apoptosis. As our knowledge of how these dietary components affect cell biochemistry improves, so the likelihood of success in chemoprevention trials and in provision of dietary advice to the general population to optimise the chances of preventing disease is increased.
Insights
Dietary compounds show chemopreventive potential by blocking cancer initiation and suppressing tumor growth through various mechanisms. Understanding these actions enhances disease prevention strategies and dietary recommendations.
Area of Science:
- Nutritional biochemistry
- Cancer prevention research
Background:
- Dietary constituents demonstrate chemopreventive effects in animal models and cell cultures.
- Compounds can act as blocking agents (preventing initiation) or suppressing agents (reducing proliferation).
- Many compounds exhibit dual blocking and suppressing activities.
Purpose of the Study:
- To explore the mechanisms of action for dietary chemopreventive compounds.
- To understand how these compounds affect cellular processes relevant to carcinogenesis.
Main Methods:
- Review of studies on dietary constituents in animal models and cell cultures.
- Analysis of biochemical mechanisms, including drug metabolism, reactive oxygen species scavenging, and signal transduction pathways.
Main Results:
- Blocking agents alter drug metabolism and scavenge reactive oxygen species.
- Suppressing agents modulate signal transduction, affecting gene expression, cell cycle arrest, and apoptosis.
- Compounds often possess both blocking and suppressing activities.
Conclusions:
- Improved understanding of dietary components' effects on cell biochemistry increases the success of chemoprevention trials.
- Knowledge gained can inform public dietary advice for optimizing disease prevention.
More Related Videos
11:44Cellular Membrane Affinity Chromatography Columns to Identify Specialized Plant Metabolites Interacting with Immobilized Tropomyosin Kinase Receptor B
Published on: January 19, 2022
10:25Screening Traditional Chinese Medicine Compounds for Inhibiting UCHL3 Activity Based on Molecular Docking and Deubiquitinating Enzyme Probe Technology
Published on: November 22, 2024
Related Concept Videos
01:12Loss of Tumor Suppressor Gene Functions
When the tumor suppressor genes develop mutations or are lost, cells start growing out of control, leading to cancer. However, a single functional copy of the tumor suppressor gene is enough for the cells to maintain their normal functions and cell...
02:59Cancer Prevention
Some...
01:25Mutagenicity and Carcinogenicity
01:28Acid Suppressive Drugs for Peptic Ulcer Disease: Histamine H2-Receptor Antagonists
01:28Chemotherapy-Induced Nausea and Vomiting: Neurokinin-1 Receptor Antagonists
01:29Chemotherapy-Induced Nausea and Vomiting: Dopamine Receptor Antagonists
Phenothiazines, such as prochlorperazine...