Related Experiment Video
Updated: Jul 6, 2026
08:09
Gene-environment Interaction Models to Unmask Susceptibility Mechanisms in Parkinson's Disease
Published on: January 7, 2014
[The gut microbiome in Parkinson's disease]
J R Bedarf1,2, F Hildebrand3, F Goeser4,5
1Klinik und Poliklinik für Neurologie, Universitätsklinikum Bonn, Sigmund-Freud-Straße 25, 53127, Bonn, Deutschland. janis.bedarf@ukbonn.de.
Der Nervenarzt
|September 2, 2018
Summary
Parkinson's disease (PD) gut microbiome alterations are detectable even in early stages. Specific bacterial shifts in Parkinson's patients may indicate disease progression and potential diagnostic markers.
Area of Science:
- Microbiology
- Neurology
- Gastroenterology
Background:
- The etiology of sporadic Parkinson's disease (PD) remains largely unknown.
- Gut microbiome alterations are increasingly implicated in PD pathogenesis.
- Previous studies suggest PD-specific changes in intestinal bacteria.
Purpose of the Study:
- To characterize the gut microbiome composition in Parkinson's disease.
- To investigate the potential of the gut microbiome as an early diagnostic marker for PD.
- To explore the link between gut microbiota and prodromal PD symptoms.
Main Methods:
- Metagenomic sequencing of gut microbiota in PD patients and healthy controls.
- Comparative analysis of bacterial composition between groups.
- Identification of specific bacterial taxa associated with PD.
Main Results:
- Consistent PD-specific alterations in gut bacterial composition were observed across studies.
- Metagenomic sequencing can distinguish early-stage PD patients from healthy individuals based on their microbiota.
- Specific bacteria, including Akkermansia, Lactobacillus, Faecalibacterium, and Prevotella, were significantly altered in PD patients.
- Similar microbial shifts were found in patients with REM sleep behavior disorder (RBD), a PD risk factor.
Conclusions:
- The gut microbiome plays a significant role in Parkinson's disease pathogenesis.
- Gut microbiota profiling shows potential for early PD diagnosis and risk assessment.
- Prodromal microbiome changes may precede synucleinopathy development, as indicated by RBD findings.
Related Concept Videos
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...
01:18Dysbiosis of the Gut Microbiota
The human gut microbiome includes a diverse array of microbial species, including beneficial commensals and opportunistic pathogens, which interact to support host health. These microbes contribute to essential functions such as nutrient metabolism, immune system modulation, and maintenance of intestinal barrier integrity. However, disruptions to this equilibrium—referred to as dysbiosis—can have widespread physiological consequences.Dysbiosis is often characterized by reduced microbial...
01:22Gut-Brain Axis
The gut–brain axis is a bidirectional communication system that connects the gastrointestinal tract and the brain. This interaction is mediated through multiple pathways, including the vagus nerve, hormonal signals, immune responses, and chemical messengers produced by gut microbes.Microbial Contributions to Brain FunctionGut microbiota contributes significantly to brain function by producing neuroactive compounds. These include neuroactive compounds that influence neurotransmitters such as...
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...
01:24Parkinson 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...