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Related Concept Videos

Redox Reactions01:27

Redox Reactions

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Redox reactions are vital biochemical processes that underpin energy metabolism in cells. These reactions involve the transfer of electrons between molecules, occurring in tandem as oxidation and reduction. Oxidation refers to the loss of electrons, while reduction denotes their gain. This coupling ensures the seamless flow of electrons through metabolic pathways. For example, in bacterial metabolism, glucose undergoes oxidation to carbon dioxide, while oxygen is simultaneously reduced to...
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Redox Reactions01:24

Redox Reactions

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Oxidation-reduction or redox reactions involve the transfer of electrons from one molecule or atom to another. When an atom gains an electron, another atom must lose an electron, meaning oxidation and reduction must occur together. Since the redox occurs in pairs, the atom that gets oxidized is also called the reducing agent or reductant, and the atom that is reduced is also called the oxidizing agent or oxidant. A straightforward way to remember the definitions of oxidation and reduction is...
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Redox Equilibria: Overview01:23

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A reduction-oxidation reaction is commonly called a redox reaction. In a redox reaction, electrons are transferred from one species to another rather than being shared between or among atoms. The reducing agent or reductant is the species that loses electrons and gets oxidized in the process. The species that gains electrons and gets reduced in the process is the oxidizing agent or oxidant. Redox reactions are represented as two separate equations called half-reactions, where one equation...
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Balancing Redox Equations02:58

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Electrochemistry is the science involved in the interconversion of electrical and chemical reactions. Such reactions are called reduction-oxidation, or redox reactions. These important reactions are defined by changes in oxidation states for one or more reactant elements and include a subset of reactions involving the transfer of electrons between reactant species. Electrochemistry as a field has evolved to yield sufficient insights on the fundamental principles of redox chemistry and multiple...
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Redox Titration: Overview01:21

Redox Titration: Overview

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Redox titration is a chemical analysis technique used to determine the concentration of an unknown substance by measuring the electron transfer in a redox (reduction-oxidation) reaction. The process involves gradually adding a titrant with a known concentration of an oxidizing or reducing agent, to the analyte, the solution with an unknown concentration, until reaching the endpoint, which indicates the completion of the reaction between the two substances. Ensuring the analyte is in a single...
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Oxidation-Reduction Reactions03:11

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ROS Live Cell Imaging During Neuronal Development
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NRF2: Translating the Redox Code.

Krishna S Tummala1, Filippos Kottakis1, Nabeel Bardeesy1

  • 1Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA 02114, USA.

Trends in Molecular Medicine
|August 25, 2016
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Summary
This summary is machine-generated.

Cancer cells use Nrf2 to manage harmful reactive oxygen species (ROS). This antioxidant pathway prevents damage to protein synthesis machinery, crucial for tumor growth.

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Area of Science:

  • Oncology
  • Molecular Biology
  • Biochemistry

Background:

  • Cancer cells generate reactive oxygen species (ROS) during rapid growth.
  • Cells require antioxidant mechanisms, like the transcription factor Nrf2, to survive.
  • The specific targets of ROS-induced damage in cancer remain largely unknown.

Purpose of the Study:

  • To investigate the role of Nrf2-mediated redox control in pancreatic cancer.
  • To identify the molecular targets affected by ROS in the context of cancer cell proliferation.
  • To understand how antioxidant pathways support protein synthesis in cancer.

Main Methods:

  • Analysis of Nrf2 activity in pancreatic cancer models.
  • Investigation of cysteine oxidation in the mRNA translational machinery.
  • Assessment of protein synthesis rates under varying redox conditions.

Main Results:

  • Nrf2 activation in pancreatic cancer mitigates ROS.
  • Redox control by Nrf2 prevents cysteine oxidation of key translational components.
  • This protection of the translational machinery supports efficient protein synthesis, aiding cancer growth.

Conclusions:

  • Nrf2 plays a critical role in managing ROS in pancreatic cancer.
  • Protecting the mRNA translational machinery from oxidative damage is a key function of Nrf2.
  • Targeting Nrf2 or its downstream pathways could be a strategy for pancreatic cancer therapy.