Related Experiment Video

Updated: Jul 28, 2026

Oral Administration of Rotenone using a Gavage and Image Analysis of Alpha-synuclein Inclusions in the Enteric Nervous System
11:53

Oral Administration of Rotenone using a Gavage and Image Analysis of Alpha-synuclein Inclusions in the Enteric Nervous System

Published on: October 26, 2010

Enhanced sensitivity of dopaminergic neurons to rotenone-induced toxicity with aging

Amie L Phinney1, Gerda Andringa, John G J M Bol

  • 1Department of Medical Pharmacology, Institute for Clinical and Experimental Neurosciences, VU University Medical Center, Van der Boechorststraat 7, 1081 BT Amsterdam, The Netherlands.

Parkinsonism & Related Disorders
|February 21, 2006
PubMed

Insights

Advancing age increases the vulnerability of dopaminergic neurons to rotenone, a Parkinsonism-inducing agent. Older rats showed significant neuron loss, unlike younger rats, highlighting age as a critical factor in rotenone toxicity models.

Area of Science:

  • Neuroscience
  • Toxicology
  • Aging Research

Background:

  • Rotenone is a pesticide known to induce Parkinsonism in animal models.
  • The impact of aging on neuronal susceptibility to neurotoxins like rotenone is not fully understood.

Purpose of the Study:

  • To investigate if advancing age alters the sensitivity of dopaminergic neurons to rotenone.
  • To determine the effect of age on rotenone-induced neurotoxicity in the substantia nigra.

Main Methods:

  • Administration of a low, systemic dose of rotenone to young and older rats.
  • Quantification of tyrosine hydroxylase-positive neurons in the substantia nigra.
  • Assessment of glial cell activation.

Main Results:

  • A low dose of rotenone caused no significant effect in young rats.
  • Older rats exhibited a 20-30% reduction in tyrosine hydroxylase-positive neurons after rotenone exposure.
  • The observed neurotoxicity was specific to dopaminergic neurons in the substantia nigra and correlated with increased glial activation.

Conclusions:

  • Aging enhances the sensitivity of dopaminergic neurons to rotenone.
  • Age-related changes, including glial activation, may contribute to increased susceptibility to rotenone.
  • These findings are crucial for refining rodent models of Parkinson's disease.

More Related Videos

Protocol for the Differentiation of Human Induced Pluripotent Stem Cells into Mixed Cultures of Neurons and Glia for Neurotoxicity Testing09:02

Protocol for the Differentiation of Human Induced Pluripotent Stem Cells into Mixed Cultures of Neurons and Glia for Neurotoxicity Testing

Published on: June 9, 2017

Quantifying Levels of Dopaminergic Neuron Morphological Alteration and Degeneration in Caenorhabditis elegans06:17

Quantifying Levels of Dopaminergic Neuron Morphological Alteration and Degeneration in Caenorhabditis elegans

Published on: November 20, 2021

Related Concept Videos

Parkinson's Disease: Treatment01:24

Parkinson's Disease: Treatment

Neurodegenerative disorders, such as Parkinson's Disease (PD), involve the gradual and irreversible destruction of neurons in particular brain areas. These disorders exhibit standard features like proteinopathies, selective vulnerability of some neurons, and an interaction of intrinsic properties, genetics, and environmental influences in neural injury.
Parkinson's Disease is primarily a result of the loss of dopaminergic neurons in the substantia nigra pars compacta. The cornerstone of its...
Parkinson Disease ll: Pathophysiology01:24

Parkinson Disease ll: Pathophysiology

Parkinson disease (PD) is a progressive neurodegenerative disorder primarily affecting movement, with additional non-motor features. Its pathophysiology involves complex interactions among genetic susceptibility, environmental exposures, and cellular dysfunction, including dopaminergic neuron loss, protein aggregation, and mitochondrial impairment.Selective NeurodegenerationA key feature is the degeneration of dopaminergic neurons in the substantia nigra pars compacta, leading to reduced...