Related Experiment Video
Updated: Nov 13, 2025
A Phenotyping Regimen for Genetically Modified Mice Used to Study Genes Implicated in Human Diseases of Aging
Published on: July 14, 2016
Abrogating mitochondrial ROS in neurons or astrocytes reveals cell-specific impact on mouse behaviour
Carlos Vicente-Gutierrez1, Nicolo Bonora2, Daniel Jimenez-Blasco1
1Institute of Functional Biology and Genomics, University of Salamanca, CSIC, 37007, Salamanca, Spain; Centro de Investigación Biomédica en Red Sobre Fragilidad y Envejecimiento Saludable (CIBERFES), Instituto de Salud Carlos III, Madrid, Spain; Institute of Biomedical Research of Salamanca, University Hospital of Salamanca, University of Salamanca, CSIC, 37007, Salamanca, Spain.
Abstract:
Cells naturally produce mitochondrial reactive oxygen species (mROS), but the in vivo pathophysiological significance has long remained controversial. Within the brain, astrocyte-derived mROS physiologically regulate behaviour and are produced at one order of magnitude faster than in neurons. However, whether neuronal mROS abundance differentially impacts on behaviour is unknown. To address this, we engineered genetically modified mice to down modulate mROS levels in neurons in vivo. Whilst no alterations in motor coordination were observed by down modulating mROS in neurons under healthy conditions, it prevented the motor discoordination caused by the pro-oxidant neurotoxin, 3-nitropropionic acid (3-NP). In contrast, abrogation of mROS in astrocytes showed no beneficial effect against the 3-NP insult. These data indicate that the impact of modifying mROS production on mouse behaviour critically depends on the specific cell-type where they are generated.
Insights
Mitochondrial reactive oxygen species (mROS) in neurons, not astrocytes, protect against neurotoxin-induced motor deficits. Modulating mROS in specific brain cells impacts mouse behavior differently.
Area of Science:
- Neuroscience
- Cell Biology
- Biochemistry
Background:
- Mitochondrial reactive oxygen species (mROS) are endogenously produced, but their in vivo role in disease and behavior remains debated.
- Astrocyte-derived mROS are known to regulate physiological behavior, but neuronal mROS function is unclear.
Purpose of the Study:
- To investigate the specific role of neuronal mROS in regulating behavior and their impact on neurotoxin-induced motor deficits.
Main Methods:
- Genetically modified mice were engineered to downregulate mROS levels specifically in neurons.
- Mice were subjected to behavioral tests under healthy conditions and after administration of the pro-oxidant neurotoxin 3-nitropropionic acid (3-NP).
- Comparisons were made with the effects of abrogating mROS in astrocytes.
Main Results:
- Downregulating neuronal mROS did not affect motor coordination in healthy mice.
- Neuronal mROS downregulation prevented motor discoordination induced by 3-NP.
- Abrogating mROS in astrocytes offered no protection against 3-NP-induced motor deficits.
Conclusions:
- The cell-type-specific generation of mROS critically determines their impact on mouse behavior.
- Neuronal mROS play a protective role against specific neurotoxin-induced motor impairments.
More Related Videos
06:47In Utero Electroporation of Multiaddressable Genome-Integrating Color MAGIC Markers to Individualize Cortical Mouse Astrocytes
Published on: May 21, 2020
09:56Determination of Mitochondrial Membrane Potential and Reactive Oxygen Species in Live Rat Cortical Neurons
Published on: May 23, 2011