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Related Concept Videos

Interactions Between Signaling Pathways01:19

Interactions Between Signaling Pathways

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Signaling cascades usually lack linearity. Multiple pathways interact and regulate one another, allowing cells to integrate and respond to diverse environmental stimuli.
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Translocation of Proteins into the Mitochondria01:19

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Mitochondrial precursors are translocated to the internal subcompartments via independent mechanisms involving distinct protein machineries called translocases.
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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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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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The mitochondrial electron transport chain (ETC) is the main energy generation system in the eukaryotic cells. However, mitochondria also produce cytotoxic reactive oxygen species (ROS) due to the large electron flow during oxidative phosphorylation. While Complex I is one of the primary sources of superoxide radicals, ROS production by Complex II is uncommon and may only be observed in cancer cells with mutated complexes.
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Related Experiment Video

Updated: Apr 16, 2026

Sensitive Measurement of Mitophagy by Flow Cytometry Using the pH-dependent Fluorescent Reporter mt-Keima
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Emerging functional cross-talk between the Keap1-Nrf2 system and mitochondria.

Ken Itoh1, Peng Ye1, Tomoh Matsumiya2

  • 1Department of Stress Response Science, Center for Advanced Medical Research, Hirosaki University Graduate School of Medicine, 5 Zaifu-cho, Hirosaki 036-8562, Japan.

Journal of Clinical Biochemistry and Nutrition
|March 12, 2015
PubMed
Summary

Nuclear factor erythroid-derived 2-related factor 2 (Nrf2) regulates protective genes against oxidative stress. This review explores how Nrf2 signaling interacts with mitochondria to maintain cellular health.

Keywords:
NRF-1Nrf2heme oxygenase-1mitochondriap62

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Area of Science:

  • Cellular Biology
  • Molecular Biology
  • Biochemistry

Background:

  • Nuclear factor erythroid-derived 2-related factor 2 (Nrf2) is a transcription factor regulating cytoprotective genes.
  • Nrf2 activation in tumors promotes growth and chemoresistance.
  • Emerging evidence links Nrf2 to mitochondrial biogenesis and homeostasis.

Purpose of the Study:

  • To critically examine the relationship between Nrf2 and mitochondria.
  • To explore the communication between the Nrf2 stress pathway and mitochondria.
  • To understand Nrf2's role in maintaining cellular homeostasis during oxidative stress.

Main Methods:

  • Literature review of studies on Nrf2, oxidative stress, and mitochondria.
  • Analysis of Nrf2's role in cancer and its impact on cellular processes.
  • Examination of Nrf2 activation in models of mitochondrial dysfunction.

Main Results:

  • Nrf2 regulates hundreds of genes that counteract oxidative stress.
  • Activated Nrf2 in tumors influences metabolic pathways and chemoresistance.
  • Nrf2 activation is observed in conditions of decreased cellular respiration and mitochondrial defects.

Conclusions:

  • The Nrf2 stress response pathway is intimately connected with mitochondria.
  • This communication is crucial for maintaining cellular homeostasis under oxidative stress.
  • Nrf2 plays a significant role in mitochondrial health and function.