Dna Damage Response
Dna Damage Response - Related Videos
10:24
Two- and Three-Dimensional Live Cell Imaging of DNA Damage Response Proteins
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Cited by 4 •
2012
This protocol describes a method for visualizing a DNA double-strand break signaling protein activated in response to DNA damage as well as its localization during mitosis.
10:44
Laser Microirradiation to Study In Vivo Cellular Responses to Simple and Complex DNA Damage
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Cited by 12 •
2018
The goal of this protocol is to describe how to use laser microirradiation to induce different types of DNA damage, including relatively simple strand breaks and complex damage, to study DNA damage signaling and repair factor assembly at damage sites in vivo.
10:28
Imaging Mismatch Repair and Cellular Responses to DNA Damage in Bacillus subtilis
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Cited by 8 •
2010
A detailed protocol is described for imaging the real time formation of DNA repair complexes in Bacillus subtilis cells.
06:19
Comet Assay for DNA Damage Detection in Cells
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2025
The video demonstrates the comet assay for detecting DNA damage following exposure to harmful agents. Under alkaline conditions, the DNA unwinds and denatures, and upon electrophoresis, the undamaged and damaged DNA migrate differently in the agarose gel, forming a comet-shaped structure. The slowly migrating undamaged DNA forms the circular comet head, while the rapidly migrating damaged DNA fragments form the elongated comet tail.
04:09
Assessing DNA Damage Foci: To Identify Radiation-Induced DNA Damage Foci in Cancer Cell Line Using Immunofluorescence Staining
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2023
This video describes a protocol to detect radiation-induced DNA repair foci in the colon cancer cell lines using immunofluorescence staining. DNA repair proteins get activated at the DNA damage site; therefore, we can detect them using specific antibodies and visualize them under a fluorescence microscope.
FAQs
Detection initiates a signaling cascade that communicates the presence and significance of a lesion throughout the cell. Signaling proteins help recruit repair factors to the affected DNA and can pause cell-cycle progression, creating time for corrective processes. This ordered response links local damage recognition with broader control of genome maintenance and cell proliferation.
A temporary cell-cycle pause limits the chance that damaged DNA will be copied or passed to daughter cells before repair occurs. This checkpoint-like control coordinates genome maintenance with proliferation, helping prevent replication errors from becoming stable mutations. If damage cannot be resolved, the same response can redirect the cell toward senescence or apoptosis rather than continued division.
The response integrates damage signaling with the outcome of repair activity. When repair factors can address the lesion, signaling supports restoration of DNA and eventual resumption of proliferation. When damage remains irreparable, the system can promote senescence, a durable loss of proliferative capacity, or apoptosis, which removes the affected cell and limits the risk of harmful genome instability.
Replication errors, radiation, and chemical exposure are identified as important sources of DNA lesions that activate these pathways. Although the initiating events differ, each can threaten the accuracy or continuity of genetic information. Studying how cells respond to these varied stresses helps connect environmental or replication-associated damage with mutation prevention and genome stability.
A biological analysis can follow the sequence from lesion detection through signaling, cell-cycle control, repair-factor recruitment, and the final cellular outcome. Examining these linked stages reveals how cells preserve genetic information under stress. The approach also helps investigators relate defects in genome maintenance to altered proliferation, mutation risk, and cellular survival.
Defects or altered activity in genome-maintenance pathways can change how cells regulate proliferation, tolerate environmental stress, or accumulate harmful mutations. These relationships make the response relevant to cancer and aging research, while inherited repair disorders provide another context for studying faulty genome preservation. The same biology also informs therapies designed to target tumor cells with defective repair systems.