Clinical trial Recruiting at 1 site Interventional Ages 40 to 75

Using fecal microbiota transplantation to treat constipation in Parkinson's disease

Official title: Evaluation of the Efficacy and Safety of Fecal Microbiota Transplantation for Parkinson's Disease Patients With Constipation

Run by Shanghai Zhongshan Hospital · NCT06388863 · Data updated 2026-11-12

This study is testing whether a treatment using gut bacteria from healthy donors can help people with Parkinson's disease who struggle with constipation.

More Parkinson Disease trials

Quick facts

Study typeInterventional
Ages40 Years to 75 Years
SexAll
Enrollment76 (estimated)
SponsorShanghai Zhongshan Hospital
Academic / other
Locations1 site (Shanghai, Shanghai Municipality)
StatusRecruiting
StartedFebruary 21, 2025
Main results expectedDecember 31, 2026
Study endsDecember 31, 2027
Registry record updatedApril 4, 2025
Trial IDNCT06388863 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are individuals aged 40-75 with a diagnosis of Parkinson's disease and specific constipation symptoms.

Probably not a fit

Patients with advanced Parkinson's disease or those with other gastrointestinal disorders may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This clinical trial evaluates the efficacy and safety of fecal microbiota transplantation (FMT) for treating constipation in patients with Parkinson's disease. Participants are randomly assigned to receive either FMT capsules or placebo capsules for 24 weeks, with assessments conducted to measure improvements in constipation, emotional well-being, and quality of life. Fecal and blood samples will also be collected for further analysis of gut microbiota and levodopa levels. The study aims to provide insights into the potential benefits of FMT in managing gastrointestinal symptoms associated with Parkinson's disease.

Why it matters

Potential benefit: If successful, this treatment could significantly improve constipation and overall quality of life for patients with Parkinson's disease.

How similar studies have gone: While the use of fecal microbiota transplantation is a novel approach in this context, similar studies have shown promising results in other gastrointestinal conditions.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

1. Participants who fulfill Chinese diagnostic criteria for PD (2016 edition), aged 40-75 years;
2. PD Hoehn-Yahr stage 1-3
3. Participants who have at least 2 of the following symptoms in the past 3 months and the symptoms have been present for at least 6 months: ① More than 25% of defecations are laborious; ② More than 25% of defecations consist of hard or lumpy stools; ③ More than 25% of defecations are accompanied by a sensation of incomplete evacuation; ④ More than 25% of defecations are accompanied by a sensation of anorectal obstruction; ⑤ More than 25% of defecations require manual assistance; ⑥ Less than 3 spontaneous bowel movements per week.
4. Have taken a stable dose of anti-Parkinson drugs, antidepressants and antipsychotics for at least 1 month;
5. Absence of red flags such as weight loss, hematochezia and exclusion of other diagnosis;
6. Have signed the informed consent and agree to participate in this study;

Exclusion Criteria:

1. Parkinsonism-plus syndrome;
2. Stroke, brain trauma or epilepsy;
3. Have undergone surgery intervention due to PD;
4. Pregnant, planning pregnancy or lactating;
5. Psychiatric disorder or unable to cooperate with treatment and follow-up visit;
6. Immunodeficiency or treatment with immune-modulating medication;
7. Have undergone any abdominal surgery, with the exception of appendectomy, cholecystectomy, caesarean section and hysterectomy;
8. Presence of uncontrolled diabetes, hypertension, thyroid disease or other systemic disease;
9. Use of probiotics or antibiotics within 1 month prior to study entry;
10. Presence of severe diseases related to heart, brain, kidney and lung or concomitant malignancies;

Where it's running

  • 180 Fenglin Road
    Shanghai, Shanghai Municipality, China
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.