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ConstipationPhase 2NCT06827977

A Study of Microbiome Transplantation for the Treatment of Constipation and/or Significant Bloating in Patients With Systemic Sclerosis

A Phase 2 study testing PRIM-DJ2727 in people with Constipation and Bloating, run by The University of Texas Health Science Center, Houston at 1 site in United States.

Recruiting

Looking for participants now. Contact the study team or a site below to ask about taking part.

Sites and contacts
Official record
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Trial summary

The purpose of this study is to characterize the intestinal flora in subjects with systemic sclerosis-related constipation and/or significant bloating and to determine safety and trends in improvements in the diversity of colonic microbiome and patient symptoms following the administration of either frozen or… Read more about this study

Who is it for?
Ages 18 years and older
Conditions the study is for
Constipation, Bloating
What is being tested?
PRIM-DJ2727
Type of treatment
Pill or oral medicine
Could I receive a placebo?
Yes, some participants may receive a placebo
How many people
21 participants
Where
1 siteUnited States
Study dates
3 Mar 2025to 30 Jun 2028
Phase
Phase 2
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 years and older
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Are seen in the UT Houston Scleroderma Center (UTHSC)
  • Meet 2013 American college of rheumatology (ACR)/European league against rheumatism (EULAR) criteria or CREST criteria for SSc
  • Meet Rome IV criteria for constipation and/or significant bloating
  • Subject willing to sign an informed consent form
  • Subject deemed likely to survive for ≥ 1 year after enrollment
  • Able to follow study procedure and follow-up
Show all 10Show fewer
  • Sexually active male and female subjects of childbearing potential must agree to use an effective method of birth control during the treatment and follow-up period
  • Female subjects of childbearing potential must have a negative pregnancy test in the 72 hours before the procedure
  • Subjects who agree to adhere to a stable diet for at least 4 weeks before joining the study and throughout the study
  • Subjects must have an attending physician who will provide non-transplant care for the subject

Who cannot join

  • Subjects with constipation and/or significant bloating from causes not attributed to SSc as determined by the treating physician (e.g., inflammatory bowel disease, medication, significant diabetes, or hypothyroidism, etc.)
  • Subjects unwilling to stop taking probiotic supplements during the duration of the study
  • Subjects that have post-total or hemicolectomy or the presence of a colostomy
  • Subjects unable to tolerate microbiome transplant via enema for any reason or swallow capsules
  • Subjects requiring systemic antibiotic therapy 4 weeks before the study
  • If subjects are on immunosuppression, the immunosuppression dose should be stable for at least 4 weeks before study enrollment

Trial locations and contacts

1 site in 1 country. Contact the study team or a site near you to ask about taking part.

Zsuzsanna McMahan, MD, MHS contact

713-500-7531

Zsuzsanna.H.McMahan@uth.tmc.edu

Ashish P Balar, MBBS, MPH contact

713-500-4409

Ashish.P.Balar@uth.tmc.edu

United States1 site, 1 recruiting
  • The University of Texas Health Science Center at Houston

    Houston, Texas, 77030

    Zsuzsanna McMahan, MD, MHS, 713-500-7531, Zsuzsanna.H.McMahan@uth.tmc.edu

    Ashish P Balar, MBBS, MPH, 713-500-4409, Ashish.P.Balar@uth.tmc.edu

    Recruiting

Other trials in United States

About this study

The purpose of this study is to characterize the intestinal flora in subjects with systemic sclerosis-related constipation and/or significant bloating and to determine safety and trends in improvements in the diversity of colonic microbiome and patient symptoms following the administration of either frozen or lyophilized PRIM-DJ2727 microbiota.

Read the detailed description

The purpose of this study is to evaluate the tolerability and safety of frozen and lyophilized microbiome transplant product (PRIM- DJ2727), to characterize the microbiome (α-diversity and β-diversity) and metabolome in patients with Systemic Sclerosis (SSc)-related constipation and/or significant bloating, to examine improvement in constipation and/or significant bloating after microbiome transplant, to examine improved colonic transit after microbiome transplant, to examine subjective global improvement and improvement in SSc disease characteristics, to monitor change in concentration of systemic and fecal inflammatory markers, and to monitor for change in fecal short-chain fatty acids and metabolome.

Being tested
PRIM-DJ2727, Placebo
Keywords
Systemic Sclerosis
Medical subject headings
Constipation, Scleroderma, Systemic

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • PRIM-DJ2727Drug

    For oral administration, each dose will contain the number of capsules needed to deliver the lyophilized intestinal bacteria powder derived after lyophilization of 60 g of filtered stool in 300 mL 0.85% NaCl and 2% mannitol. Participants will take the capsules (5-6 capsules twice weekly) from week 2 through week 10. Capsules will be taken over a period of up to one hour to maximize tolerance and ensure the capsules are not expelled by vomiting.

    For administration via retention enema, which will be done at baseline and week 11, 50 g of filtered, frozen stool in 250 mL of 0.85% sodium chloride (NaCl) will be used.

  • PlaceboDrug

    Placebo will be administered as capsules from week 2-10 and as enema at baseline and week 11.

Study groups in NCT06827977
Study groupRoleWhat they receive
PRIM-DJ2727ExperimentalNot described
Receives: Drug: PRIM-DJ2727
PlaceboPlacebo comparatorNot described
Receives: Drug: Placebo

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Change in symptoms and signs of constipation and/or significant bloating as assessed by total score on the University of California, Los Angeles Gastrointestinal Tract Questionnaire, version 2.0 (UCLA GIT 2.0)

    This consists of 34 questions covering domains such as diarrhea, constipation, abdominal pain, nausea, bloating, gastroesophageal reflux, fecal incontinence, and emotional well-being related to GI symptoms. Each item is scored on a Likert scale ranging from 0 to 3 (0 = none, 1 = mild, 2 = moderate, 3 = severe), with higher scores indicating greater symptom severity. Domain scores are calculated as the sum of responses to items within the domain, and a total score is calculated by summing all domain scores, representing the overall GI symptom burden. Total score will be reported, and the total score ranges from 0-102.

    Measured: pre-transplant, post-treatment within weeks 11 to 12

  2. Change in Pelvic Floor Distress as Assessed by the Pelvic Floor Distress Inventory Questionnaire-20 (PFDI-20 summary score)

    The Pelvic Floor Distress Inventory Questionnaire-20 (PFDI-20) is composed of 3 subscales: the Urinary Distress Inventory-6 (UDI-6), the Pelvic Organ Prolapse Distress Inventory-6 (POPDI-6), and the Colorectal-Anal Distress Inventory-8 (CRADI-8). For each question, the participant must indicate how much bowl, bladder, or pelvic symptoms have been bothering them in the past 3 months on a 4-point scale that ranges from "not at all" (0) to "quite a bit" (4). Total score for each subscale ranges from 0 to 100, with a higher score indicating worse distress. The sum of the 3 subscales are added together to get the PFDI-20 summary score, which ranges from 0 to 300, with a higher score indicating worse distress.

    Measured: pre-transplant, post-treatment within weeks 11 to 12

  3. Change in Pelvic Floor Distress as Assessed by the Pelvic Floor Distress Inventory Questionnaire-20 (UDI-6 subscale score)

    The Pelvic Floor Distress Inventory Questionnaire-20 (PFDI-20) is composed of 3 subscales: the Urinary Distress Inventory-6 (UDI-6), the Pelvic Organ Prolapse Distress Inventory-6 (POPDI-6), and the Colorectal-Anal Distress Inventory-8 (CRADI-8). For each question, the participant must indicate how much bowl, bladder, or pelvic symptoms have been bothering them in the past 3 months on a 4-point scale that ranges from "not at all" (0) to "quite a bit" (4). Total score for each subscale ranges from 0 to 100, with a higher score indicating worse distress. The sum of the 3 subscales are added together to get the PFDI-20 summary score, which ranges from 0 to 300, with a higher score indicating worse distress.

    Measured: pre-transplant, post-treatment within weeks 11 to 12

  4. Change in Pelvic Floor Distress as Assessed by the Pelvic Floor Distress Inventory Questionnaire-20 (POPDI-6 subscale score)

    The Pelvic Floor Distress Inventory Questionnaire-20 (PFDI-20) is composed of 3 subscales: the Urinary Distress Inventory-6 (UDI-6), the Pelvic Organ Prolapse Distress Inventory-6 (POPDI-6), and the Colorectal-Anal Distress Inventory-8 (CRADI-8). For each question, the participant must indicate how much bowl, bladder, or pelvic symptoms have been bothering them in the past 3 months on a 4-point scale that ranges from "not at all" (0) to "quite a bit" (4). Total score for each subscale ranges from 0 to 100, with a higher score indicating worse distress. The sum of the 3 subscales are added together to get the PFDI-20 summary score, which ranges from 0 to 300, with a higher score indicating worse distress.

    Measured: pre-transplant, post-treatment within weeks 11 to 12

  5. Change in Pelvic Floor Distress as Assessed by the Pelvic Floor Distress Inventory Questionnaire-20 (CRADI-8 subscale score)

    The Pelvic Floor Distress Inventory Questionnaire-20 (PFDI-20) is composed of 3 subscales: the Urinary Distress Inventory-6 (UDI-6), the Pelvic Organ Prolapse Distress Inventory-6 (POPDI-6), and the Colorectal-Anal Distress Inventory-8 (CRADI-8). For each question, the participant must indicate how much bowl, bladder, or pelvic symptoms have been bothering them in the past 3 months on a 4-point scale that ranges from "not at all" (0) to "quite a bit" (4). Total score for each subscale ranges from 0 to 100, with a higher score indicating worse distress. The sum of the 3 subscales are added together to get the PFDI-20 summary score, which ranges from 0 to 300, with a higher score indicating worse distress.

    Measured: pre-transplant, post-treatment within weeks 11 to 12

  6. Change in symptoms and signs of constipation as assessed by score on the Patient Assessment of Constipation Symptoms (PAC-SYM) scale

    The PAC-SYM is a 12-item questionnaire that assesses abdominal, rectal, and stool symptoms, with each item scored from 0 (No symptoms) to 4 (Very severe symptoms), for a total score range of 0-48, with a higher score indicating worse constipation severity.

    Measured: pre-transplant, post-treatment within weeks 11 to 12

  7. Change in Gastrointestinal Symptom Severity as Assessed by the Patient Assessment of Gastrointestinal Disorders-Symptom Severity Index (PAGI-SYM)

    Total score ranges from 0 (none or absent) to 5 (very severe), with a higher score indicating a worse outcome.

    Measured: pre-transplant, post-treatment within weeks 11 to 12

  8. Number of participants who show an improvement in constipation and/or significant bloating symptoms as indicated by the stool diary

    Measured: from baseline to end of study (week 12)

  9. Change in gut transit times (assessed by Sitz markers and X-ray)

    Measured: pre-transplant, post-treatment within weeks 11 to 12

Secondary outcomes (2)
  1. Change in alpha diversity of the microbiome

    Species richness and evenness within a single sample will be measured.

    Measured: pre-transplant, post-treatment within weeks 11 to 12

  2. Change in beta diversity of the microbiome

    Measured: pre-transplant, post-treatment within weeks 11 to 12

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted14 Feb 2025
  2. Study start3 Mar 2025
  3. Primary completion30 Jun 2027 (estimated)
  4. Study completion30 Jun 2028 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 2
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Parallel groups
Masking
Quadruple blind
Who is masked
Participant, Care provider, Investigator, Outcomes assessor
Enrolment
21 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT06827977
Sponsor's protocol ID
HSC-MS-24-0630
Status last verified
Jul 2026
First submitted
9 Feb 2025
Last updated
8 Jul 2026
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
Yes
FDA-regulated device
No
Individual data sharing
No

Questions about this trial

What is this clinical trial studying?

A Phase 2 study testing PRIM-DJ2727 in people with Constipation and Bloating, run by The University of Texas Health Science Center, Houston at 1 site in United States.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 10 inclusion and 6 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: looking for participants now, as of the sponsor's last update on 8 Jul 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

Contact Zsuzsanna McMahan, MD, MHS (713-500-7531, Zsuzsanna.H.McMahan@uth.tmc.edu), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Change in symptoms and signs of constipation and/or significant bloating as assessed by total score on the University of California, Los Angeles Gastrointestinal Tract Questionnaire, version 2.0 (UCLA GIT 2.0) (time frame: pre-transplant, post-treatment within weeks 11 to 12). The study lists 9 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 8 Jul 2026.

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