Parkinson's disease and gut microbiota: from clinical to mechanistic and therapeutic studies
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Updated: Jul 8, 2025

Author Spotlight: Exploring Non-Motor Symptoms in Parkinson's Disease
Published on: September 22, 2023
Xuxiang Zhang1, Beisha Tang1,2,3,4,5,6, Jifeng Guo7,8,9,10,11,12
1Department of Neurology, Xiangya Hospital, Central South University, Changsha, 410008, China.
Abstract:
Parkinson's disease (PD) is one of the most prevalent neurodegenerative diseases. The typical symptomatology of PD includes motor symptoms; however, a range of nonmotor symptoms, such as intestinal issues, usually occur before the motor symptoms. Various microorganisms inhabiting the gastrointestinal tract can profoundly influence the physiopathology of the central nervous system through neurological, endocrine, and immune system pathways involved in the microbiota-gut-brain axis. In addition, extensive evidence suggests that the gut microbiota is strongly associated with PD. This review summarizes the latest findings on microbial changes in PD and their clinical relevance, describes the underlying mechanisms through which intestinal bacteria may mediate PD, and discusses the correlations between gut microbes and anti-PD drugs. In addition, this review outlines the status of research on microbial therapies for PD and the future directions of PD-gut microbiota research.
Insights
Parkinson's disease (PD) is linked to gut microbiota changes. This review explores how gut bacteria influence PD, their connection to treatments, and potential microbial therapies for this neurodegenerative disease.
Area of Science:
- Neuroscience
- Microbiology
- Gastroenterology
Background:
- Parkinson's disease (PD) is a prevalent neurodegenerative disorder.
- Non-motor symptoms, like intestinal issues, often precede motor deficits in PD.
- The gut microbiota-brain axis influences central nervous system physiology.
Purpose of the Study:
- To review current findings on gut microbial alterations in PD.
- To describe mechanisms linking gut bacteria to PD pathogenesis.
- To discuss the relationship between gut microbes, anti-PD drugs, and microbial therapies.
Main Methods:
- Literature review of recent research on PD and gut microbiota.
- Analysis of studies on microbial changes, mechanisms, and therapeutic strategies.
- Synthesis of evidence on the microbiota-gut-brain axis in PD.
Main Results:
- Significant associations exist between gut microbiota composition and PD.
- Gut bacteria can influence PD through neurological, endocrine, and immune pathways.
- Correlations between gut microbes and the efficacy of anti-PD medications are evident.
Conclusions:
- Gut microbiota plays a crucial role in Parkinson's disease.
- Understanding these microbial connections may lead to novel therapeutic approaches.
- Further research into microbial therapies for PD is warranted.
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