Mediterranean Diet Adherence in People With Parkinson's Disease Reduces Constipation Symptoms and Changes Fecal Microbiota After a 5-Week Single-Arm Pilot Study

Carley Rusch, Matthew Beke, Lily Tucciarone, Carmelo Nieves Jr, Maria Ukhanova, Massimiliano S Tagliamonte, Volker Mai, Joon Hyuk Suh, Yu Wang, Shannon Chiu, Bhavana Patel, Adolfo Ramirez-Zamora, Bobbi Langkamp-Henken, Carley Rusch, Matthew Beke, Lily Tucciarone, Carmelo Nieves Jr, Maria Ukhanova, Massimiliano S Tagliamonte, Volker Mai, Joon Hyuk Suh, Yu Wang, Shannon Chiu, Bhavana Patel, Adolfo Ramirez-Zamora, Bobbi Langkamp-Henken

Abstract

Introduction: Non-motor symptoms of Parkinson's disease (PD) such as gastrointestinal (GI) dysfunction are common, yet little is known about how modifying dietary intake impacts PD symptoms. The aim of this study in individuals with PD was to determine whether a Mediterranean diet intervention is feasible and affects GI function, intestinal permeability and fecal microbial communities. Methods: A single-arm, 5-week Mediterranean diet intervention study was conducted in eight people with PD. Daily and weekly questionnaires were administered to determine changes in GI symptoms. Urine and stool samples were collected at baseline and after 5 weeks to assess intestinal permeability and fecal microbial communities. Additionally, live-in partners of the participants with PD were matched as controls (n = 8) for baseline urine and stool samples. Results: Participants with PD increased intake of Mediterranean diet based on adherence scores from baseline to week 5 (4.4 ± 0.6 vs. 11.9 ± 0.7; P < 0.01 with >10 representing good adherence), which was linked with weight loss (77.4 kg vs. 74.9 kg, P = 0.01). Constipation syndrome scores decreased after 5 weeks (2.3 ± 0.5 vs. 1.5 ± 0.3; P = 0.04). Bilophila, was higher at baseline in PD (0.6 ± 0.1% vs. 0.2 ± 0.1% P = 0.02) and slightly decreased after the diet intervention (0.5 ± 0.1%; P = 0.01). Interestingly, the proportion of Roseburia was significantly lower in PD compared to controls (0.6 ± 0.2% vs. 1.6 ± 0.3%; P = 0.02) and increased at week 5 (0.9 ± 0.2%; P < 0.01). No differences were observed for markers of intestinal permeability between the control and PD groups or post-intervention. Conclusions: Short-term Mediterranean diet adherence is feasible in participants with PD; correlated with weight loss, improved constipation, and modified gut microbiota. Clinical Trial Registration: ClinicalTrials.gov, identifier: NCT03851861.

Keywords: Mediterranean diet; Parkinson's disease; constipation; intestinal permeability; microbiota.

Conflict of interest statement

The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

Copyright © 2021 Rusch, Beke, Tucciarone, Nieves, Ukhanova, Tagliamonte, Mai, Suh, Wang, Chiu, Patel, Ramirez-Zamora and Langkamp-Henken.

Figures

Figure 1
Figure 1
Heat-map of prevalent bacterial OTUs (determined by z-score) with 95% similarity at baseline between control (n = 8) and PD groups (n = 8) and changes after a 5-week Mediterranean diet intervention (PD group; n = 8). (A) OTUs that were more prevalent in the control group compared to PD group at baseline. (B) OTUs that were more prevalent in the PD group compared to control group at baseline. (C) OTUs that decreased after the Mediterranean diet intervention in the PD group.

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