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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.
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Genes usually encode proteins necessary for the proper functioning of a healthy cell. Mutations can often cause changes to the gene expression pattern, thereby altering the phenotype.
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Mitogen-activated protein kinase, or MAPK pathway, activates three sequential kinases to regulate cellular responses such as proliferation, differentiation, survival, and apoptosis. The canonical MAPK pathway starts with a mitogen or growth factor binding to an RTK. The activated RTKs stimulate Ras, which recruits Raf or MAP3 Kinase (MAPKKK), the first kinase of the MAPK signaling cascade. Raf further phosphorylates and activates MEK or MAP2 Kinases (MAPKK), which in turn phosphorylates MAP...
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Genes usually encode proteins necessary for the proper functioning of a healthy cell. Mutations can often cause changes to the gene expression pattern, thereby altering the phenotype.
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Nuclear factor-kappaB in cancer development and progression.

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Area of Science:

  • Molecular Biology
  • Immunology
  • Oncology

Background:

  • Nuclear factor-kappaB (NF-kappaB) transcription factors coordinate immune responses.
  • NF-kappaB signalling is increasingly recognized for its role in cancer.
  • It provides a link between inflammation and cancer development.

Purpose of the Study:

  • To elucidate the role of NF-kappaB signalling in cancer.
  • To understand how NF-kappaB influences tumour-surveillance mechanisms.
  • To identify NF-kappaB pathways as potential therapeutic targets.

Main Methods:

  • The study reviews existing literature on NF-kappaB signalling in immunity and cancer.
  • Analysis of NF-kappaB's role in apoptosis resistance, angiogenesis, and invasiveness.
  • Exploration of NF-kappaB activation pathways.

Main Results:

  • NF-kappaB is crucial for innate and adaptive immunity.
  • NF-kappaB signalling promotes cancer development and progression.
  • It enables cancer cells to evade apoptosis-based tumour surveillance.
  • NF-kappaB may regulate tumour angiogenesis and invasiveness.

Conclusions:

  • NF-kappaB signalling is a critical mediator linking inflammation and cancer.
  • Targeting NF-kappaB activation pathways offers potential for cancer chemoprevention and chemotherapy.