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Related Concept Videos

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...
Parkinson Disease l: Introduction01:24

Parkinson Disease l: Introduction

Parkinson’s disease is a chronic, progressive neurodegenerative disorder that primarily affects movement. It is characterized by motor symptoms such as resting tremors, muscle rigidity, bradykinesia (slowness of movement), and postural instability. Patients may notice hand tremors at rest, stiffness during movement, or a shuffling gait. In addition to motor features, non-motor symptoms include sleep disturbances, mood and behavioral changes, constipation, and cognitive impairment, all of which...
Neural Regulation01:37

Neural Regulation

Digestion begins with a cephalic phase that prepares the digestive system to receive food. When our brain processes visual or olfactory information about food, it triggers impulses in the cranial nerves innervating the salivary glands and stomach to prepare for food.
Parkinson's Disease: Overview01:15

Parkinson's Disease: Overview

Neurodegenerative disorders are progressive diseases that cause irreversible damage and loss to neurons in specific brain areas. Examples of these disorders include Parkinson's disease, Alzheimer's disease, Multiple Sclerosis (MS), and Amyotrophic Lateral Sclerosis (ALS). These disorders share characteristics such as proteinopathies, selective neuronal vulnerability, and a complex interplay between genetic and environmental factors. The primary therapeutic goal for these conditions is to...
Alzheimer Disease ll: Pathophysiology01:23

Alzheimer Disease ll: Pathophysiology

Alzheimer disease involves structural changes in the brain that begin long before symptoms appear. The most distinctive features are extracellular neuritic plaques and intracellular neurofibrillary tangles.Neuritic plaques form in the cerebral cortex and around blood vessels. These plaques contain a dense core of beta-amyloid (Aβ)—a toxic protein fragment that clumps outside neurons. The core is surrounded by damaged neuronal extensions, as well as reactive astrocytes and microglia. Abnormal...
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...

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Gene-environment Interaction Models to Unmask Susceptibility Mechanisms in Parkinson's Disease
08:09

Gene-environment Interaction Models to Unmask Susceptibility Mechanisms in Parkinson's Disease

Published on: January 7, 2014

Inflammatory Pathways in Parkinson's Disease; A BNE Microarray Study.

Pascal F Durrenberger1, Edna Grünblatt, Francesca S Fernando

  • 1Centre for Neuroscience, Division of Experimental Medicine, Faculty of Medicine, Imperial College London, Hammersmith Hospital Campus, Du Cane Road, London W12 0NN, UK.

Parkinson'S Disease
|May 2, 2012
PubMed
Summary
This summary is machine-generated.

Parkinson's disease involves neuronal death linked to dopamine metabolism and oxidative stress. Targeting microglial activation and endothelial pathways may offer neuroprotection against this neurodegenerative condition.

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Phenotypic Profiling of Human Stem Cell-Derived Midbrain Dopaminergic Neurons
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Phenotypic Profiling of Human Stem Cell-Derived Midbrain Dopaminergic Neurons

Published on: July 7, 2023

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Last Updated: May 22, 2026

Gene-environment Interaction Models to Unmask Susceptibility Mechanisms in Parkinson's Disease
08:09

Gene-environment Interaction Models to Unmask Susceptibility Mechanisms in Parkinson's Disease

Published on: January 7, 2014

Phenotypic Profiling of Human Stem Cell-Derived Midbrain Dopaminergic Neurons
09:21

Phenotypic Profiling of Human Stem Cell-Derived Midbrain Dopaminergic Neurons

Published on: July 7, 2023

Area of Science:

  • Neuroscience
  • Cell Biology
  • Pathology

Background:

  • The precise cause of Parkinson's disease (PD) remains unclear, but multifactorial neuronal cell death is suspected.
  • Substantia nigra homeostasis disruption and alpha-synuclein aggregation are key research focuses in PD.
  • ALDH1A1 gene variations suggest dopamine metabolism dysfunction, oxidative stress, and subsequent neuronal death in PD.

Purpose of the Study:

  • To investigate pathways contributing to neuronal cell death in Parkinson's disease.
  • To identify potential neuroprotective therapeutic targets.
  • To explore the roles of microglial activation and angiogenesis in PD pathogenesis.

Main Methods:

  • Utilized microarray technology to analyze gene expression patterns in PD.
  • Focused on the P2X7 receptor pathway (microglial activation) and NOS3 pathway (angiogenesis).
  • Examined the consequences of striatal dopamine neuronal cell death.

Main Results:

  • ALDH1A1 gene consistently highlighted dopamine metabolism dysfunction and oxidative stress.
  • Neuronal cell death triggers inflammation via astrocyte and microglia activation.
  • Extracellular ATP and reactive astrocytes activate microglia, releasing proinflammatory cytokines.

Conclusions:

  • While the initial trigger of striatal dopamine neuronal cell death is undetermined, its consequences are significant.
  • Therapeutic strategies should consider reducing oxidative stress, microglial activation, and endothelial activation.
  • Targeting these pathways may support neuronal outgrowth and offer novel neuroprotective approaches for Parkinson's disease.