Related Experiment Video
Updated: Aug 9, 2026
28:15
Deficient Pms2, ERCC1, Ku86, CcOI in Field Defects During Progression to Colon Cancer
Published on: July 28, 2010
Role of low-level ionizing radiation in multi-step carcinogenic process
1Department of Pediatrics and Human Development, College of Human Medicine, Michigan State University, East Lansing, MI 48824, USA.
Health Physics
|June 1, 1996
Summary
Cancer development involves multiple factors, not a single cause. This study integrates various carcinogenesis theories, emphasizing intercellular communication
Area of Science:
- Oncology
- Radiation Biology
- Genetics
Background:
- Carcinogenesis is a complex process influenced by numerous endogenous and exogenous factors.
- Existing theories of carcinogenesis, including those involving ionizing radiation, require integration to fully understand cancer development.
- Intercellular communication plays a crucial role in biological processes and may be a unifying factor in different carcinogenesis models.
Purpose of the Study:
- To review and integrate prominent theories of carcinogenesis.
- To examine the role of intercellular communication in linking these theories.
- To investigate the potential impact of radiation-induced biological effects on intercellular communication and cancer development.
Main Methods:
- Literature review of experimental, in vitro, in vivo, and epidemiological studies on carcinogenesis.
- Integration of stem cell theory, oncogeny as partially blocked ontogeny, initiation/promotion/progression model, oncogene/tumor suppressor gene theory, and mutation/epigenetic theories.
- Analysis of how radiation-induced biological effects (mutations, cell killing, apoptosis, epigenetic alterations) affect intercellular communication.
Main Results:
- Carcinogenesis is a multi-step process influenced by a combination of genetic and epigenetic factors.
- Intercellular communication is a critical mechanism affected by radiation, potentially linking various carcinogenesis theories.
- Radiation-induced biological effects, including mutations and epigenetic alterations, can disrupt normal cellular communication pathways.
Conclusions:
- A unified model of carcinogenesis can be developed by considering intercellular communication as a central mechanism.
- Understanding the interplay between radiation exposure, intercellular communication, and multi-step carcinogenesis is crucial for risk assessment.
- Further research into low-level radiation effects on intercellular communication may elucidate cancer development in exposed populations.
More Related Videos
![Chemical-Induced Skin Carcinogenesis Model Using Dimethylbenz[a]Anthracene and 12-O-Tetradecanoyl Phorbol-13-Acetate (DMBA-TPA)](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F60445.jpg&w=3840&q=50)
04:12Chemical-Induced Skin Carcinogenesis Model Using Dimethylbenz[a]Anthracene and 12-O-Tetradecanoyl Phorbol-13-Acetate (DMBA-TPA)
Published on: December 19, 2019
06:20Irradiator Commissioning and Dosimetry for Assessment of LQ α and β Parameters, Radiation Dosing Schema, and in vivo Dose Deposition
Published on: March 11, 2021
Related Concept Videos
01:39Mutations
Overview
02:59Biological Effects of Radiation
All radioactive nuclides emit high-energy particles or electromagnetic waves. When this radiation encounters living cells, it can cause heating, break chemical bonds, or ionize molecules. The most serious biological damage results when these radioactive emissions fragment or ionize molecules. For example, α and β particles emitted from nuclear decay reactions possess much higher energies than ordinary chemical bond energies. When these particles strike and penetrate matter, they produce ions...
02:59Cancer Prevention
Several factors can increase the risk of cancer in an individual. About 50% of cancer cases can be prevented by adopting a healthy lifestyle, regular exercise, eating healthy, and following a modest cancer prevention diet. Epidemiological studies have consistently shown that populations with vegetable and fruit-rich diets have reduced the incidence of cancer. On the other hand, populations who have a diet rich in animal fat, red meat, junk food, or high calories are predisposed to cancer.
Some...
Some...
01:35Mutations
Mutations are changes in the sequence of DNA. These changes can occur spontaneously or they can be induced by exposure to environmental factors. Mutations can be characterized in a number of different ways: whether and how they alter the amino acid sequence of the protein, whether they occur over a small or large area of DNA, and whether they occur in somatic cells or germline cells.
Chromosomal Alterations Are Large-Scale Mutations
While point mutations are changes in a single nucleotide in...
Chromosomal Alterations Are Large-Scale Mutations
While point mutations are changes in a single nucleotide in...
01:25Mutagenicity and Carcinogenicity
Mutagenicity and carcinogenicity refer to the ability of drugs to cause genetic defects and induce cancer, respectively. The International Agency for Research on Cancer (IARC) classifies agents into four groups based on their carcinogenic potential. Group 1 agents are known human carcinogens; group 2A agents are probably carcinogenic to humans; group 3 agents lack data to support their role in carcinogenesis; and group 4 includes agents for which data support that they are not likely to be...
01:30Spontaneous and Induced Mutations
Spontaneous mutations arise infrequently during DNA replication due to errors in the process. A key factor behind these errors is tautomeric shifts in nitrogenous bases, where bases transition from keto to enol forms or amino to imino forms. This shift can alter base-pairing rules, leading to mutations. Additionally, reactive oxygen species (ROS) arising from aerobic metabolism can damage DNA, resulting in depurination (loss of a purine base) or depyrimidination (loss of a pyrimidine base).