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Related Concept Videos

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...
Cellular Injury I: Introduction01:00

Cellular Injury I: Introduction

Cellular injury occurs when a cell cannot maintain homeostasis or adapt to stressors such as hypoxia, toxins, or trauma. Depending on severity and duration, injury may be reversible, allowing recovery, or irreversible, leading to cell death.General Mechanisms of Cell InjuryAlthough causes vary, most cellular injuries arise from a few key mechanisms that disrupt essential functions and often amplify one another. Cell survival depends on the extent and balance of these disturbances.ATP depletion...
Overview of DNA Repair02:25

Overview of DNA Repair

In order to be passed through generations, genomic DNA must be undamaged and error-free. However, every day, DNA in a cell undergoes several thousand to a million damaging events by natural causes and external factors. Ionizing radiation such as UV rays, free radicals produced during cellular respiration, and hydrolytic damage from metabolic reactions can alter the structure of DNA. Damages caused include single-base alteration, base dimerization, chain breaks, and cross-linkage.
Chemically...
Overview of Cell Death01:30

Overview of Cell Death

Cell death is an essential process where the body gets rid of old or damaged cells. Cell proliferation and death need to be balanced, as an imbalance between the two may lead to cancer or autoimmune diseases.
Cell death was observed in the early 19th century, but there was no experimental evidence to prove it. In 1842, Carl Vogt first discovered cell death in a metamorphic toad; however, it was not termed ‘cell death.’ Scientists discovered different cell death pathways only in the 20th century...
Nucleotide Excision Repair01:38

Nucleotide Excision Repair

DNA Distortion and Damage
Cells are regularly exposed to mutagens—factors in the environment that can damage DNA and generate mutations. UV radiation is one of the most common mutagens and is estimated to introduce a significant number of changes in DNA. These include bends or kinks in the structure, which can block DNA replication or transcription. If these errors are not fixed, the damage can cause mutations, which in turn can result in cancer or disease depending on which sequences are...
Nucleotide Excision Repair01:08

Nucleotide Excision Repair

Overview

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Related Experiment Video

Updated: Jun 12, 2026

One-step Protocol for Evaluation of the Mode of Radiation-induced Clonogenic Cell Death by Fluorescence Microscopy
06:47

One-step Protocol for Evaluation of the Mode of Radiation-induced Clonogenic Cell Death by Fluorescence Microscopy

Published on: October 23, 2017

Radiation-induced cell death mechanisms.

David Eriksson1, Torgny Stigbrand

  • 1Department of Immunology, University of Umeå, 90185 Umeå, Sweden. david.eriksson@climi.umu.se

Tumour Biology : the Journal of the International Society for Oncodevelopmental Biology and Medicine
|May 22, 2010
PubMed
Summary

Radiation therapy kills cancer cells through apoptosis and mitotic catastrophe. Understanding these cell death pathways, including senescence, can improve cancer treatment efficacy.

Area of Science:

  • Oncology
  • Radiation Biology
  • Molecular Biology

Background:

  • Radiation therapy aims to eliminate reproductive tumor cells.
  • Inducing apoptosis is a primary strategy, but insufficient alone.
  • Alternative cell death and cell cycle arrest (senescence) also inhibit proliferation.

Purpose of the Study:

  • To review apoptosis and mitotic catastrophe mechanisms induced by radiation.
  • To discuss treatment-induced senescence and its role in radiotherapy outcomes.
  • To highlight the importance of p53 in these cell death pathways.

Main Methods:

  • Literature review of radiation-induced cell death mechanisms.
  • Analysis of apoptosis, mitotic catastrophe, and senescence pathways.
  • Discussion of the role of p53 in mediating these responses.

More Related Videos

Cell Cycle-specific Measurement of γH2AX and Apoptosis After Genotoxic Stress by Flow Cytometry
08:21

Cell Cycle-specific Measurement of γH2AX and Apoptosis After Genotoxic Stress by Flow Cytometry

Published on: September 1, 2019

Immunofluorescence Imaging of DNA Damage and Repair Foci in Human Colon Cancer Cells
05:18

Immunofluorescence Imaging of DNA Damage and Repair Foci in Human Colon Cancer Cells

Published on: June 9, 2020

Related Experiment Videos

Last Updated: Jun 12, 2026

One-step Protocol for Evaluation of the Mode of Radiation-induced Clonogenic Cell Death by Fluorescence Microscopy
06:47

One-step Protocol for Evaluation of the Mode of Radiation-induced Clonogenic Cell Death by Fluorescence Microscopy

Published on: October 23, 2017

Cell Cycle-specific Measurement of γH2AX and Apoptosis After Genotoxic Stress by Flow Cytometry
08:21

Cell Cycle-specific Measurement of γH2AX and Apoptosis After Genotoxic Stress by Flow Cytometry

Published on: September 1, 2019

Immunofluorescence Imaging of DNA Damage and Repair Foci in Human Colon Cancer Cells
05:18

Immunofluorescence Imaging of DNA Damage and Repair Foci in Human Colon Cancer Cells

Published on: June 9, 2020

Main Results:

  • Radiation induces apoptosis and mitotic catastrophe via specific mechanisms.
  • Senescence is an alternative pathway inhibiting cancer cell proliferation post-irradiation.
  • p53 plays a crucial role in initiating and executing these cell death and arrest processes.

Conclusions:

  • Understanding radiation-induced cell death, including senescence, is key to enhancing radiotherapy and radioimmunotherapy.
  • Targeting key molecules in these pathways with inhibitors could potentiate treatment and improve tumor cell kill.