Related Experiment Video

Updated: Aug 22, 2026

Production and Detection of Reactive Oxygen Species (ROS) in Cancers
07:17

Production and Detection of Reactive Oxygen Species (ROS) in Cancers

Published on: November 21, 2011

Oxygen free radical and antioxidant defense mechanism in cancer

Gilberto Pérez Trueba1, Gregorio Martínez Sánchez, Atilia Giuliani

  • 1Centro de Investigaciones Biomedicas, ICBP Victoria de Girón, Ciudad de La Habana, CUBA. carlos.perez@equant.com

Frontiers in Bioscience : a Journal and Virtual Library
|September 9, 2004
PubMed

Insights

Reactive oxygen species (ROS) damage DNA, driving cancer development and progression. Understanding ROS in carcinogenesis may lead to new antioxidant-based cancer therapies.

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Oncology

Background:

  • Reactive oxygen species (ROS) are implicated in DNA damage, a key event in carcinogenesis.
  • Oxidative DNA damage is hypothesized to frequently cause mutations in normal human cells.
  • ROS play a significant role in tumor clone expansion and progression, classifying them as carcinogens.

Purpose of the Study:

  • To investigate the involvement of ROS in carcinogenesis.
  • To explore the role of oxidative DNA damage in mutagenesis.
  • To understand the imbalance of antioxidant mechanisms in various cancers.

Main Methods:

  • Literature review on ROS and DNA damage.
  • Analysis of evidence linking ROS to tumor progression.
  • Review of immunohistochemical studies on antioxidant mechanisms in cancer.

Main Results:

  • Oxidative DNA modification is a fundamental molecular event in cancer initiation.
  • ROS are considered relevant carcinogens due to their role in tumor expansion.
  • Cancers exhibit an imbalance in antioxidant mechanisms compared to normal cells.

Conclusions:

  • ROS-induced DNA damage is a critical factor in carcinogenesis.
  • Further research into ROS and antioxidant mechanisms can inform novel cancer therapies.
  • Modulating cellular redox status presents a promising strategy against ROS-driven carcinogenesis.

More Related Videos

Analysis of Oxidative Stress in Zebrafish Embryos11:05

Analysis of Oxidative Stress in Zebrafish Embryos

Published on: July 7, 2014

Quantification of three DNA Lesions by Mass Spectrometry and Assessment of Their Levels in Tissues of Mice Exposed to Ambient Fine Particulate Matter12:15

Quantification of three DNA Lesions by Mass Spectrometry and Assessment of Their Levels in Tissues of Mice Exposed to Ambient Fine Particulate Matter

Published on: May 29, 2019

Related Concept Videos

Radical Autoxidation01:20

Radical Autoxidation

The oxidation of an organic compound in the presence of air or oxygen is called autoxidation. For example, cumene reacts with oxygen to form hydroperoxide. Autoxidation involves initiation, propagation, and termination steps. Many organic compounds are susceptible to autoxidation—especially ethers in the presence of oxygen, which form hydroperoxides. Even though this reaction is slow, old ether bottles contain small amounts of peroxide, which leads to laboratory explosions during ether...
Adaptive Mechanisms in Cancer Cells02:53

Adaptive Mechanisms in Cancer Cells

Cancer cells accumulate genetic changes at an abnormally rapid rate due to the defects in the DNA repair mechanisms. From an evolutionary perspective, such genetic instability is advantageous for cancer development. Mutant cell lines accumulate a series of beneficial mutations that contribute to their progression into cancer.
Some of the advantages that cancer cells have on normal cells include - enhanced ability to divide without terminally differentiating, induce new blood vessel formation,...
Adaptive Mechanisms in Cancer Cells02:53

Adaptive Mechanisms in Cancer Cells

Cancer cells accumulate genetic changes at an abnormally rapid rate due to the defects in the DNA repair mechanisms. From an evolutionary perspective, such genetic instability is advantageous for cancer development. Mutant cell lines accumulate a series of beneficial mutations that contribute to their progression into cancer.
Some of the advantages that cancer cells have on normal cells include - enhanced ability to divide without terminally differentiating, induce new blood vessel formation,...
Oxygen Requirements and Growth Patterns01:29

Oxygen Requirements and Growth Patterns

Microorganisms exhibit diverse oxygen requirements and growth patterns driven by their metabolic strategies and environmental adaptations. Oxygen, while essential for many organisms, can also be toxic under certain conditions, shaping how microorganisms grow and survive.Oxygen Requirements of MicroorganismsMicroorganisms are classified based on their ability to use or tolerate oxygen:● Obligate aerobes like Mycobacterium tuberculosis need oxygen for energy production, as it serves as the...
Electron Transport Chain: Complex I and II01:46

Electron Transport Chain: Complex I and II

The mitochondrial electron transport chain (ETC) is the main energy generation system in the eukaryotic cells. However, mitochondria also produce cytotoxic reactive oxygen species (ROS) due to the large electron flow during oxidative phosphorylation. While Complex I is one of the primary sources of superoxide radicals, ROS production by Complex II is uncommon and may only be observed in cancer cells with mutated complexes.
ROS generation is regulated and maintained at moderate levels necessary...
Bioactivation and Tissue Toxicity01:25

Bioactivation 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...