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Related Concept Videos

Biological Effects of Radiation02:59

Biological 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...
Mutations01:35

Mutations

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...
Mutations01:39

Mutations

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Other Unique Bacteria01:18

Other Unique Bacteria

Magnetic bacteria exhibit a directed movement called magnetotaxis, driven by structures called magnetosomes. These magnetosomes consist of chains of magnetic particles made of either magnetite (Fe₃O₄) or greigite (Fe₃S₄) and are organized in a linear conformation by a protein scaffold within invaginations of the cell membrane. The bacteria align along the north–south magnetic field lines, much like a compass needle. They are typically microaerophilic or anaerobic and are commonly found near the...
Nuclear Power02:36

Nuclear Power

Controlled nuclear fission reactions are used to generate electricity. Any nuclear reactor that produces power via the fission of uranium or plutonium by bombardment with neutrons has six components: nuclear fuel consisting of fissionable material, a nuclear moderator, a neutron source, control rods, reactor coolant, and a shield and containment system.
Nuclear Fuels
Nuclear fuel consists of a fissile isotope, such as uranium-235, which must be present in sufficient quantity to provide a...
Mutagenicity and Carcinogenicity01:25

Mutagenicity 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...

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Related Experiment Video

Updated: Jun 18, 2026

Laser-heating and Radiance Spectrometry for the Study of Nuclear Materials in Conditions Simulating a Nuclear Power Plant Accident
09:18

Laser-heating and Radiance Spectrometry for the Study of Nuclear Materials in Conditions Simulating a Nuclear Power Plant Accident

Published on: December 14, 2017

Radiation carcinogenesis: lessons from Chernobyl.

D Williams1

  • 1Christ's College, University of Cambridge, Cambridge, UK. dillwyn.williams@srl.cam.ac.uk

Oncogene
|December 4, 2009
PubMed
Summary
This summary is machine-generated.

Radiation exposure, particularly from Chernobyl, significantly increased childhood thyroid cancer (papillary thyroid carcinoma). Molecular analysis reveals specific gene rearrangements in these tumors, changing with time since exposure and highlighting the need for long-term follow-up.

Related Experiment Videos

Last Updated: Jun 18, 2026

Laser-heating and Radiance Spectrometry for the Study of Nuclear Materials in Conditions Simulating a Nuclear Power Plant Accident
09:18

Laser-heating and Radiance Spectrometry for the Study of Nuclear Materials in Conditions Simulating a Nuclear Power Plant Accident

Published on: December 14, 2017

Area of Science:

  • Oncology
  • Radiation Biology
  • Molecular Pathology

Background:

  • Radiation is a known carcinogen, inducing DNA mutations and genomic instability.
  • Previous radiation effect studies primarily used atomic bomb exposure data.
  • Chernobyl fallout exposed millions to radioactive isotopes, with early increases in thyroid and possible breast cancers.

Purpose of the Study:

  • To analyze the impact of Chernobyl-related radiation exposure on cancer incidence, focusing on thyroid carcinoma.
  • To investigate the age-dependent risk and changing molecular pathology of radiation-induced papillary thyroid carcinoma (PTC).
  • To explore the genetic mechanisms underlying radiation-induced oncogenesis.

Main Methods:

  • Analysis of thyroid carcinoma incidence following Chernobyl fallout.
  • Correlation of exposure age with PTC risk and latency.
  • Molecular subtyping and genetic rearrangement analysis (RET, BRAF) of Chernobyl-associated PTCs.
  • Comparison of Chernobyl exposure with atomic bomb radiation effects.

Main Results:

  • A significant increase in thyroid carcinoma, especially in children exposed at a young age, was observed after Chernobyl.
  • The molecular subtypes and genetic rearrangements (e.g., RET-PTC1, RET-PTC3) of PTCs varied with latency.
  • Radiation-induced tumors showed common rearrangements involving oncogenes and potentially tumor suppressor/DNA repair genes.

Conclusions:

  • Chernobyl fallout led to a substantial burden of radiation-induced PTC, with age at exposure being a critical factor.
  • The evolving molecular landscape of these tumors with latency suggests complex oncogenic pathways.
  • Long-term, comprehensive follow-up of exposed populations is crucial to understand delayed cancer risks.