Related Experiment Video

Updated: Sep 27, 2026

A Guide to Production, Crystallization, and Structure Determination of Human IKK1/α
11:27

A Guide to Production, Crystallization, and Structure Determination of Human IKK1/α

Published on: November 2, 2018

Nuclear factor-kappaB protects the liver against genotoxic stress and functions independently of p53

Iris Lavon1, Eli Pikarsky, Elena Gutkovich

  • 1The Lautenberg Center for Immunology, The Hebrew University-Hadassah Medical School, Jerusalem 91120, Israel.

Cancer Research
|January 9, 2003
PubMed

Insights

Nuclear factor kappa B (NF-kappaB) protects liver tissue from chemotherapy damage, independent of p53. This finding in an animal model suggests NF-kappaB modulators could aid cancer therapy.

Area of Science:

  • Molecular Biology
  • Cellular Biology
  • Cancer Research

Background:

  • p53 and nuclear factor kappa B (NF-kappaB) are crucial in genotoxic stress responses.
  • NF-kappaB's role in apoptosis is inconsistent, potentially due to cross-regulation with p53.
  • Previous studies on p53-NF-kappaB interactions were limited to cell cultures, not whole organisms.

Purpose of the Study:

  • To investigate the roles of NF-kappaB and p53 in a liver model of doxorubicin-induced DNA damage.
  • To determine if NF-kappaB activation is dependent on p53 status in vivo.
  • To assess the contribution of p53 to chemotherapy-induced tissue damage.

Main Methods:

  • Utilized a liver animal model to study doxorubicin-induced genotoxic stress.
  • Examined the activation status of NF-kappaB and p53.
  • Assessed the protective effects of NF-kappaB against chemotherapy-induced tissue damage.

Main Results:

  • NF-kappaB activation was observed in response to doxorubicin-induced genotoxic stress.
  • NF-kappaB demonstrated a significant protective effect against chemotherapy-induced liver damage.
  • NF-kappaB activation occurred independently of p53.
  • p53 induction was also observed but did not contribute to the extent of tissue damage and was independent of NF-kappaB.

Conclusions:

  • In vivo, NF-kappaB activation provides a protective effect against chemotherapy-induced genotoxic stress in the liver.
  • NF-kappaB's protective role is independent of p53.
  • These findings highlight the potential therapeutic value of NF-kappaB modulators in cancer treatment.

Related Concept Videos

NF-κB-dependent Signaling Pathway02:26

NF-κB-dependent Signaling Pathway

The transcription factor NF-κB was discovered in 1986 in the lab of Nobel laureate Professor David Baltimore, for its interaction with the immunoglobulin light chain enhancer in B-cells. After more than three decades of study, it is now evident that NF-κB regulates the expression of over 100 genes. Most of these genes play an essential role in the innate and adaptive immune responses as well as the inflammatory responses of animals.
NF-κB-dependent Signaling Mechanism
The heterodimer of NF-κB...
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...
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...
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.