Related Experiment Video

Updated: May 12, 2026

Two- and Three-Dimensional Live Cell Imaging of DNA Damage Response Proteins
10:24

Two- and Three-Dimensional Live Cell Imaging of DNA Damage Response Proteins

Published on: September 28, 2012

[p53-independent signaling pathway in DNA damage-induced cell apoptosis]

Xiaoyun Zhang1, Ying Jiang, Jun Yang

  • 1Zhejiang University School of Public Health, Hangzhou 310058, China.

Zhejiang Da Xue Xue Bao. Yi Xue Ban = Journal of Zhejiang University. Medical Sciences
|April 16, 2013
PubMed

Insights

The tumor suppressor p53 is crucial for apoptosis after DNA damage but is often mutated in cancer. Research into p53-independent apoptosis pathways offers new therapeutic strategies for cancer treatment.

Area of Science:

  • Molecular Biology
  • Cancer Research
  • Cellular Biology

Context:

  • The p53 protein is a key regulator of apoptosis following DNA damage.
  • Mutations in the p53 gene are prevalent in over 50% of human cancers.
  • This high mutation rate necessitates the exploration of alternative cell death mechanisms.

Purpose:

  • To review recent advancements in understanding p53-independent apoptosis pathways.
  • To highlight the roles of specific signaling cascades in DNA damage-induced cell death independent of p53.
  • To identify potential therapeutic targets for cancers with p53 mutations.

Summary:

  • DNA damage can trigger apoptosis through p53-independent routes.
  • Key pathways involved include Caspase-2, p73, p63, and NF-kappa B signaling.
  • These pathways represent critical nodes in cellular response to genotoxic stress.

Impact:

  • Understanding p53-independent apoptosis can lead to novel cancer therapies.
  • Targeting these pathways may overcome resistance in p53-mutated cancers.
  • This research opens avenues for developing treatments for a wide range of malignancies.

More Related Videos

Yeast As a Chassis for Developing Functional Assays to Study Human P5314:57

Yeast As a Chassis for Developing Functional Assays to Study Human P53

Published on: August 4, 2019

Laser Microirradiation to Study In Vivo Cellular Responses to Simple and Complex DNA Damage10:44

Laser Microirradiation to Study In Vivo Cellular Responses to Simple and Complex DNA Damage

Published on: January 31, 2018

Related Concept Videos

DNA Damage Can Stall the Cell Cycle02:36

DNA Damage Can Stall the Cell Cycle

In response to DNA damage, cells can pause the cell cycle to assess and repair the breaks. However, the cell must check the DNA at certain critical stages during the cell cycle. If the cell cycle pauses before DNA replication, the cells will contain twice the amount of DNA. On the other hand, if cells arrest after DNA replication but before mitosis, they will contain four times the normal amount of DNA. With a host of specialized proteins at their disposal,cells must use the right protein at...
DNA Damage can Stall the Cell Cycle02:36

DNA Damage can Stall the Cell Cycle

In response to DNA damage, cells can pause the cell cycle to assess and repair the breaks. However, the cell must check the DNA at certain critical stages during the cell cycle. If the cell cycle pauses before DNA replication, the cells will contain twice the amount of DNA. On the other hand, if cells arrest after DNA replication but before mitosis, they will contain four times the normal amount of DNA. With a host of specialized proteins at their disposal,cells must use the right protein at...
The Intrinsic Apoptotic Pathway01:31

The Intrinsic Apoptotic Pathway

Internal cellular stress, such as cellular injury or hypoxia, triggers intrinsic apoptosis. The B-cell lymphoma 2 (Bcl-2) family of proteins are the primary regulators of the intrinsic apoptotic pathway. For example, during DNA damage, checkpoint proteins, such as Ataxia Telangiectasia Mutated (ATM protein) and Checkpoints Factor-2 (Chk2) proteins, are activated. These proteins phosphorylate p53 which further activates pro-apoptotic proteins, such as Bax, Bak, PUMA, and Noxa, and inhibits...
Abnormal Proliferation02:23

Abnormal Proliferation

Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the daughter...
Interactions Between Signaling Pathways01:19

Interactions Between Signaling Pathways

Signaling cascades usually lack linearity. Multiple pathways interact and regulate one another, allowing cells to integrate and respond to diverse environmental stimuli.
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...
Negative Regulator Molecules01:23

Negative Regulator Molecules

Positive regulators allow a cell to advance through cell cycle checkpoints. Negative regulators have an equally important role as they terminate a cell’s progression through the cell cycle—or pause it—until the cell meets specific criteria.