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Effect of probiotic supplementation on gastrointestinal motility, inflammation, motor, non-motor symptoms and mental health in Parkinson's disease: a meta-analysis of randomized controlled trials

 Jong Mi Park  ;  Sang Chul Lee  ;  Chorom Ham  ;  Yong Wook Kim 
 GUT PATHOGENS, Vol.15(1) : 9, 2023-03 
Journal Title
Issue Date
Gastrointestinal motility ; Inflammation ; Meta-analysis ; Parkinson’s disease ; Probiotics
BackgroundParkinson's disease (PD) is the second most common neurodegenerative disease worldwide. Gut dysbiosis is hypothesized to cause PD; therefore, whether probiotics can be used as adjuvants in the treatment of PD is being actively investigated.AimsWe performed a systematic review and meta-analysis to evaluate the effectiveness of probiotic therapy in PD patients.MethodsPUBMED/MEDLINE, EMBASE, Cochrane, Scopus, PsycINFO and Web of Science databases were searched till February 20, 2023. The meta-analysis used a random effects model and the effect size was calculated as mean difference or standardized mean difference. We assessed the quality of the evidence using the Grade of Recommendations Assessment, Development and Evaluation (GRADE) approach.ResultsEleven studies involving 840 participants were included in the final analysis. This meta-analysis showed high-quality evidence of improvement in Unified PD Rating Scale Part III motor scale (standardized mean difference [95% confidence interval]) (- 0.65 [- 1.11 to - 0.19]), non-motor symptom (- 0.81 [- 1.12 to - 0.51]), and depression scale (- 0.70 [- 0.93 to -0.46]). Moderate to low quality evidence of significant improvement was observed in gastrointestinal motility (0.83 [0.45-1.10]), quality of life (- 1.02 [- 1.66 to - 0.37]), anxiety scale (- 0.72 [- 1.10 to - 0.35]), serum inflammatory markers (- 5.98 [- 9.20 to - 2.75]), and diabetes risk (- 3.46 [- 4.72 to - 2.20]). However, there were no significant improvements in Bristol Stool Scale scores, constipation, antioxidant capacity, and risk of dyslipidemia. In a subgroup analysis, probiotic capsules improved gastrointestinal motility compared to fermented milk.ConclusionProbiotic supplements may be suitable for improving the motor and non-motor symptoms of PD and reducing depression. Further research is warranted to determine the mechanism of action of probiotics and to determine the optimal treatment protocol.
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1. College of Medicine (의과대학) > Dept. of Rehabilitation Medicine (재활의학교실) > 1. Journal Papers
Yonsei Authors
Kim, Yong Wook(김용욱) ORCID logo https://orcid.org/0000-0002-5234-2454
Park, Jong Mi(박종미)
Lee, Sang Chul(이상철) ORCID logo https://orcid.org/0000-0002-6241-7392
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