Related Experiment Video
Updated: Jun 4, 2026
06:07
Histological Examination of Mitochondrial Morphology in a Parkinson's Disease Model
Published on: June 23, 2023
Functional Defect Conferred by the Parkinson's Disease-Causing α-Synuclein (Ala30Pro) Mutation.
1Department of Medical Biochemistry, University of Aarhus, Denmark.
Methods in Molecular Medicine
|February 15, 2011
Summary
Parkinson's disease mutations in alpha-synuclein disrupt its transport to nerve cell terminals. This disruption may cause alpha-synuclein to accumulate in the cell body, potentially leading to Lewy bodies and Parkinson's disease.
Area of Science:
- Neuroscience
- Molecular Biology
- Genetics
Background:
- Missense mutations in the alpha-synuclein gene are linked to heritable Parkinson's disease (PD).
- Alpha-synuclein accumulation in Lewy bodies is observed in sporadic PD, suggesting a broader role in disease pathogenesis.
- The functional consequences of specific alpha-synuclein mutations, particularly regarding loss and gain of function, remain sparsely investigated.
Purpose of the Study:
- To investigate the functional effects of pathogenic alpha-synuclein mutations on protein-vesicle interactions.
- To explore how these interactions may influence fast axonal transport and contribute to Parkinson's disease pathology.
- To present a modified technique for studying alpha-synuclein and brain vesicle interactions.
Main Methods:
- Utilized a modified technique to study interactions between alpha-synuclein and brain vesicles.
- Investigated the effect of the Ala30Pro alpha-synuclein mutation on these interactions.
- Recombinant human alpha-synucleins were generated, expressed, and purified.
- Sodium dodecyl sulfate (SDS) gel electrophoresis and electroblotting methodologies were employed.
Main Results:
- The Ala30Pro mutation was found to inhibit the interaction between mutant alpha-synuclein and brain vesicles.
- This inhibition hypothetically perturbs fast axonal transport of alpha-synuclein.
- Potential consequence is increased alpha-synuclein concentration in the cell body, promoting aggregation.
Conclusions:
- The Ala30Pro mutation's inhibitory effect on vesicle interaction is a potential mechanism contributing to Parkinson's disease.
- Perturbation of fast axonal transport by mutant alpha-synuclein may lead to Lewy body formation.
- The described technique facilitates the study of pathogenic mutations' functional impact on alpha-synuclein.
Related Concept Videos
01:24Parkinson 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...
01:24Parkinson 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...
01:15Parkinson'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...
01:24Parkinson'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's Disease is primarily a result of the loss of dopaminergic neurons in the substantia nigra pars compacta. The cornerstone of its...
01:37Neural 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.
01:11Alterations in Muscle Tone lll
Rigidity and myotonia are distinct abnormalities of muscle tone that affect resistance and relaxation during movement. Although both involve altered muscle contraction, they arise from different neurological and muscular mechanisms.CharacteristicsRigidity is characterized by uniform resistance to passive movement across the entire range, independent of speed, affecting flexors and extensors equally. It may appear as lead-pipe rigidity (smooth, constant resistance) or cogwheel rigidity...