ClinicalTrials.gg
Not yet recruitingNCT07619638AIM-IBDUpdated Sep 30, 2026

AIM-IBD: A Microbiome-Targeted Supplement in Mild-to-Moderate Ulcerative Colitis

An interventional study of Microbiome-Targeting Nutraceutical and Placebo in Ulcerative Colitis (UC), Inflammatory Bowel Disease (IBD) and Colitis, sponsored by ENBIOSIS BIOTECHNOLOGIES. Not yet recruiting at 1 site in Turkey (Türkiye). Open to participants aged 18 Years to 75 Years. Per ClinicalTrials.gov, last updated 2026-09-30.

Sponsored by ENBIOSIS BIOTECHNOLOGIES · Not applicable, Interventional, and Supportive care

Updated Sep 30, 2026Now Not yet recruitingStart date moved+2 moreGo to Updates ↓
Phase
Not applicable
Study type
Interventional
Enrollment
162
Allocation
Randomized
Ages
18 Years to 75 Years
Sex
All
01

Study summary

This Phase 2b randomized, double-blind, placebo-controlled, multicenter trial will evaluate the efficacy and safety of a once-daily oral microbiome-targeted food supplement compared with matching placebo in adults with mild-to-moderate, objectively active ulcerative colitis. The supplement is food-grade and is intended for use either alongside stable standard ulcerative colitis therapy (5-aminosalicylic acid/mesalamine) or in participants not currently on any inflammatory bowel disease therapy.

Approximately 162 participants will be enrolled at university hospital centers in Turkey and randomized in a 1:1 ratio to receive either the food supplement or matching placebo for 24 weeks, in addition to their existing background therapy as defined by eligibility.

The primary objective is to determine whether the supplement increases the proportion of participants achieving composite clinical-plus-biochemical remission at Week 24. This composite endpoint requires absence of rectal bleeding, improvement in stool frequency, fecal calprotectin ≤250 micrograms/g, and no rescue therapy, prohibited treatment escalation, ulcerative colitis-related hospitalization, colectomy, or discontinuation for lack of efficacy before Week 24.

Key secondary endpoints include endoscopic improvement, deep biochemical remission, change in fecal calprotectin, change in partial Mayo score, corticosteroid-free composite remission, change in quality of life, change in C-reactive protein, time to treatment failure, and safety. Exploratory analyses will assess stool microbiome composition, eukaryotic carriage including Blastocystis, and associations between baseline microbiome features and treatment response.

Read the detailed description

Ulcerative colitis is a chronic inflammatory disease of the colonic mucosa characterized by relapsing and remitting symptoms including rectal bleeding, increased stool frequency, urgency, and impaired quality of life. Although 5-aminosalicylic acid (5-ASA, mesalamine) is the foundation of treatment for mild-to-moderate disease, a meaningful proportion of patients have persistent symptoms or ongoing objective inflammation despite optimized therapy, and many wish to defer immunosuppressive or biologic therapy. The intestinal microbiota of patients with active ulcerative colitis differ from those of healthy individuals, with depletion of short-chain fatty acid-producing taxa, reduced diversity, and altered microbial metabolism. Food-grade microbiome-targeted interventions therefore offer a non-immunosuppressive option to modify intestinal microbial ecology and inflammatory activity in this gap.

AIM-IBD is designed as a Phase 2b, randomized, double-blind, placebo-controlled, parallel-group, multicenter proof-of-concept trial. Randomization is centralized and stratified by study site and baseline 5-ASA status. Participants, investigators, site staff, outcome assessors, endoscopy readers, central laboratory personnel, microbiome and metabolomics analysts, and the primary trial statistician remain blinded to allocation until database lock, except where emergency unblinding is required for participant safety. Blinding integrity is formally assessed at Weeks 12 and 24 using participant and investigator treatment-guess questionnaires summarized with Bang's and James's blinding indices.

The Week 24 endoscopic assessment is by protocol-mandated flexible sigmoidoscopy with dual independent blinded reading and adjudication of discordant scores. Fecal calprotectin and other biomarkers are measured in a central laboratory. Stool samples for microbiome and metabolomics analyses are collected at baseline, Week 12, and Week 24 under a harmonized study procedure.

The planned sample size of 162 participants (81 per arm) provides approximately 90% power to detect a 23-percentage-point absolute difference in the Week 24 primary endpoint (placebo 12% vs active 35%), with two-sided alpha 0.05 and approximately 15% attrition. This ambitious effect size is defensible only because the trial is designed as a high-signal proof-of-concept study: the enrolled population is enriched for objectively active disease (fecal calprotectin ≥250 µg/g and rectal bleeding subscore ≥1 at screening), background therapy is held constant (stable 5-ASA at unchanged dose for ≥8 weeks, or no inflammatory bowel disease therapy), and patients with recent advanced-therapy exposure or current corticosteroids are excluded. Sensitivity analyses across a range of placebo and active response assumptions are prespecified in the Statistical Analysis Plan.

The intention-to-treat population is the primary analysis population. The primary composite endpoint is analyzed using stratified Cochran-Mantel-Haenszel methodology adjusted for randomization stratification factors. Key secondary endpoints are tested in a fixed-sequence hierarchical procedure controlling the family-wise error rate at two-sided alpha 0.05. The estimand framework follows ICH E9(R1): treatment failures (rescue therapy, prohibited escalation, ulcerative colitis-related hospitalization, colectomy, discontinuation for lack of efficacy) are handled under a composite strategy, with a supplementary treatment-policy estimand and prespecified sensitivity analyses (multiple imputation, tipping-point analysis, pattern-mixture).

An independent Data Safety Monitoring Board with a written charter oversees safety, with scheduled reviews after approximately 25%, 50%, and 75% of planned enrollment and ad hoc reviews for predefined safety signals. An independent Endpoint Adjudication Committee adjudicates ulcerative colitis-related hospitalizations, colectomies, and any deaths. Rescue therapy is permitted at any time when clinically necessary; participants requiring rescue therapy or any prohibited treatment escalation before Week 24 are classified as treatment failures for the primary endpoint and continue safety follow-up whenever feasible.

The trial is conducted in accordance with the Declaration of Helsinki and ICH-GCP E6(R3). Reporting follows the CONSORT statement, the SPIRIT protocol framework, and the STORMS reporting checklist for the microbiome workstream.

02

Conditions studied

  • Ulcerative Colitis (UC)
  • Inflammatory Bowel Disease (IBD)
  • Colitis

Keywords

  • Ulcerative colitis
  • Inflammatory bowel disease
  • Microbiome
  • Gut microbiota
  • Fecal calprotectin
  • Artificial intelligence
  • Partial Mayo score
  • 5-ASA
  • Mesalamine
  • Nutraceutical
  • Placebo-controlled trial
  • Blastocystis
  • Microbiome-targeting nutraceutical
03

In context

Colitis, Ulcerative

1,853 studies on the registry are indexed under Colitis, Ulcerative; 472 are open to participants now.

This study's planned enrollment of 162 is above the median of 70 across 1,236 interventional studies indexed under Colitis, Ulcerative.

Browse Colitis, Ulcerative studies →

Lead sponsor

ENBIOSIS BIOTECHNOLOGIES is the lead sponsor of 2 studies on the registry; 2 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 75 Years
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  1. Adults aged 18 to 75 years inclusive at screening.
  2. Documented diagnosis of ulcerative colitis established at least 3 months before screening, based on standard clinical, endoscopic, and histologic criteria.
  3. Mild-to-moderate active ulcerative colitis defined by a partial Mayo score of 4 to 8 at screening.
  4. Rectal bleeding subscore of at least 1 at screening.
  5. Objective intestinal inflammation defined by fecal calprotectin of at least 250 micrograms per gram at screening, measured by the central laboratory or by a validated harmonized assay.
  6. Eligible disease extent: left-sided colitis or extensive/pancolitis. Proctosigmoiditis is eligible if inflammation extends beyond isolated proctitis and is measurable by study endoscopy. Isolated ulcerative proctitis (E1 only) is eligible only within a prespecified cap not exceeding 10 percent of total enrollment.
  7. Either no current ulcerative colitis-directed therapy, or stable oral and/or rectal 5-aminosalicylate (5-ASA, mesalamine) therapy at unchanged dose for at least 8 weeks before randomization, with intent to continue at the same unchanged dose through Week 24 unless rescue therapy is clinically required.
  8. Able and willing to provide written .
  9. Able and willing to comply with study visits, stool sampling, endoscopy, medication restrictions, and diary/patient-reported outcome completion.
  10. Participants of must agree to use a highly effective method of during dosing and for at least 4 weeks after the last dose, in accordance with EMA/CTFG guidance and local ethics requirements.

Exclusion criteria

Exclusion Criteria:

  1. Crohn disease, inflammatory bowel disease-unclassified, microscopic colitis, ischemic colitis, infectious colitis, radiation colitis, or any other non-ulcerative-colitis form of colitis.
  2. Severe ulcerative colitis, acute severe ulcerative colitis, fulminant colitis, toxic megacolon, or any disease severity requiring immediate hospitalization or treatment escalation in the investigator's judgment.
  3. Isolated ulcerative proctitis (E1 only) outside the prespecified 10 percent enrollment cap.
  4. Use of biologics, Janus kinase (JAK) inhibitors, sphingosine-1-phosphate (S1P) receptor modulators, or systemic within 8 weeks before randomization, or planned use of any of these during the trial.
  5. Systemic within 4 weeks before randomization.
  6. Current budesonide-class therapy at baseline.
  7. Rectal or topical corticosteroids unless discontinued at least 2 weeks before randomization.
  8. Antibiotic use within 4 weeks before randomization, except topical antibiotics not expected to affect the gut microbiota.
  9. Probiotic, prebiotic, synbiotic, postbiotic, fermented microbiome-directed supplement, or other non-study microbiome-directed product within 4 weeks before randomization, or planned use during the trial.
  10. Active or recent Clostridioides difficile infection within 12 weeks before screening (screening uses a two-step algorithm: glutamate dehydrogenase plus toxin A/B enzyme immunoassay, with reflex nucleic acid amplification testing for discordant results).
  11. Positive stool test for any enteric infection at screening, per local diagnostic standard operating procedures.
  12. Prior colectomy, planned colectomy, known dysplasia requiring intervention, or colorectal cancer.
  13. Pregnancy, breastfeeding, or planned pregnancy during the trial.
  14. Uncontrolled clinically significant comorbidity, including but not limited to uncontrolled diabetes, advanced liver or renal disease, unstable cardiovascular disease, immunodeficiency, active other than adequately treated non-melanoma skin cancer, or any other condition compromising participant safety or interpretation of study results.
  15. Known allergy, intolerance, or to any component of the product or matching placebo.
  16. Participation in another interventional clinical trial within 30 days before screening.
  17. Any other condition that, in the investigator's judgment, would make participation unsafe or compromise protocol adherence.
Terms in these criteria, in plain language(9)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

Childbearing potential

Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).

Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.

Contraception

Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.

Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.

Immunosuppression

A weakened immune system. It can come from an illness, such as HIV or some blood cancers, or from medicines that turn the immune system down, for example after an organ transplant or for an autoimmune disease; steroids at higher doses count.

Read whether the line is about a condition or about medicines, and which medicines and doses it means.

Corticosteroids (steroids)

Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.

Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.

Clinically significant

Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.

Cancer (malignancy)

Malignancy means cancer. Criteria about another or earlier malignancy ask whether you have had a different cancer, usually within a set number of years.

Some are commonly allowed, such as treated skin cancers other than melanoma and early cancers removed completely — check the exceptions this study lists.

Contraindication

A reason a treatment, test or procedure should not be given to a particular person, such as an allergy, another illness or a medicine they take.

Investigational drug or device

A drug or device being studied in a clinical trial.

It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.

05

Study design

Phase
Not applicable
Primary purpose
Supportive care
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Quadruple (Participant, Care provider, Investigator, Outcomes assessor)
Enrollment
162 participants (estimated)

Study arms

  • Experimental
    Microbiome-Targeting Investigational Product

    Participants assigned to this arm will receive the microbiome-targeting investigational product orally once daily for 24 weeks, in addition to either no background ulcerative colitis therapy or stable 5-aminosalicylic acid/mesalamine therapy at an unchanged dose, according to eligibility criteria. Rescue therapy or treatment escalation is permitted at any time if clinically needed.

    Dietary Supplement: Microbiome-Targeting Nutraceutical

  • Placebo comparator
    Placebo

    Participants assigned to this arm will receive matching placebo orally once daily for 24 weeks, in addition to either no background ulcerative colitis therapy or stable 5-aminosalicylic acid/mesalamine therapy at an unchanged dose, according to eligibility criteria. Rescue therapy or treatment escalation is permitted at any time if clinically needed.

    Dietary Supplement: Placebo

Interventions

  • Dietary supplementMicrobiome-Targeting Nutraceutical

    The investigational product is an oral microbiome-targeting preparation administered once daily for 24 weeks. It is intended to modulate gut microbial ecology and/or microbial metabolite production in adults with mild-to-moderate ulcerative colitis. The dosage form, dose, composition class, storage conditions, and batch-release specifications are documented in the study protocol and investigational product dossier reviewed by the ethics committee and relevant regulatory authority.

  • Dietary supplementPlacebo

    The placebo is an oral matching preparation administered once daily for 24 weeks. It contains inactive excipients only and is matched to the investigational product in appearance, packaging, administration schedule, and organoleptic characteristics, including color, taste, smell, and mouthfeel, as closely as technically feasible.

06

What researchers measure

Primary outcomes

  1. Proportion of Participants Achieving Composite Clinical-Plus-Biochemical Remission at Week 24

    Responder defined by all four criteria at Week 24: (1) rectal bleeding subscore = 0 on the Mayo 0-3 scale (lower = less bleeding; 0 = no blood seen); (2) stool frequency subscore ≤1 on the Mayo 0-3 scale (lower = fewer stools above the participant's normal) with at least a 1-point decrease from baseline; (3) fecal calprotectin ≤250 µg/g (lower = less mucosal inflammation), measured centrally; (4) no rescue therapy, prohibited escalation, UC-related hospitalization, colectomy, or discontinuation for lack of efficacy through Week 24. Participants not meeting any criterion, or with missing Week 24 data, are counted as non-responders (non-responder imputation). Higher proportion = greater treatment benefit. Analyzed in the intention-to-treat population using stratified Cochran-Mantel-Haenszel adjusted for randomization stratification factors, reporting absolute risk difference with Newcombe 95% CI.

    Time frame: Baseline to Week 24

Secondary outcomes

  1. Proportion of Participants With Endoscopic Improvement at Week 24

    Responder defined as Mayo endoscopic subscore ≤1 at Week 24 (scale 0-3; lower = less inflammation; 0 = normal, 1 = mild erythema/decreased vascular pattern, 2 = marked erythema/friability/erosions, 3 = spontaneous bleeding/ulceration). Week 24 assessment is by protocol-mandated flexible sigmoidoscopy of the most inflamed segment with standardized image/video capture, scored by two independent blinded readers; discordant scores or scores crossing the ≤1 vs \>1 threshold are adjudicated by a third blinded reader (adjudicator score = trial-of-record). Participants meeting any treatment-failure criterion before Week 24, or not undergoing the Week 24 endoscopy without documented medical exception, are counted as non-responders. A completer-only sensitivity analysis is prespecified. Higher proportion = greater treatment benefit. Analyzed in the intention-to-treat population using stratified Cochran-Mantel-Haenszel; effect estimate is absolute risk difference (Newcombe 95% CI).

    Time frame: Baseline to Week 24

  2. Proportion of Participants With Deep Biochemical Remission at Week 24

    Responder defined as fecal calprotectin ≤150 µg/g at Week 24, measured centrally using a validated assay. Fecal calprotectin is a stool neutrophil-derived biomarker of intestinal inflammation: healthy adults typically \<50 µg/g; well-controlled UC \<150-250 µg/g; active disease often several hundred to several thousand µg/g. The 150 µg/g threshold is stricter than the 250 µg/g threshold used in the primary composite endpoint and corresponds to the deep biochemical remission target in STRIDE-II treat-to-target guidance. Participants meeting any treatment-failure criterion before Week 24, or with missing Week 24 calprotectin, are counted as non-responders (non-responder imputation). A completer-only sensitivity analysis is prespecified. Higher proportion = greater treatment benefit. Analyzed in the intention-to-treat population using stratified Cochran-Mantel-Haenszel adjusted for randomization stratification factors; effect estimate is absolute risk difference (Newcombe 95% CI).

    Time frame: Baseline to Week 24

  3. Change in Fecal Calprotectin From Baseline to Week 24

    Continuous endpoint quantifying treatment effect on intestinal inflammation. Fecal calprotectin is a stool neutrophil-derived biomarker measured centrally using a validated assay at baseline and Week 24; healthy adults typically \<50 µg/g, well-controlled UC \<150-250 µg/g, active disease often several hundred to several thousand µg/g, with no fixed upper limit. Lower values indicate less mucosal inflammation. Values are log-transformed (natural log, after substituting half the lower limit of quantification for any below-LLOQ result), and the treatment effect is summarized as the geometric mean ratio of active vs placebo at Week 24 with 95% confidence interval, derived from a mixed model for repeated measures with treatment, visit, treatment-by-visit interaction, log baseline calprotectin, and randomization stratification factors as fixed effects. A geometric mean ratio below 1 indicates a greater reduction in fecal calprotectin in the active arm relative to placebo.

    Time frame: Baseline to Week 24

  4. Change in Fecal Calprotectin From Baseline to Week 12

    Continuous endpoint quantifying early treatment effect on intestinal inflammation, prespecified as an interim biomarker readout midway through the 24-week treatment period. Fecal calprotectin is a stool neutrophil-derived biomarker measured centrally using a validated assay at baseline and Week 12; healthy adults typically \<50 µg/g, well-controlled UC \<150-250 µg/g, active disease often several hundred to several thousand µg/g. Lower values indicate less mucosal inflammation. Values are log-transformed (natural log, after substituting half the lower limit of quantification for any below-LLOQ result) and the treatment effect is summarized as the geometric mean ratio of active vs placebo at Week 12 with 95% confidence interval, derived from a mixed model for repeated measures with treatment, visit, treatment-by-visit interaction, log baseline calprotectin, and randomization stratification factors as fixed effects. A ratio below 1 indicates greater reduction in the active arm vs placebo.

    Time frame: Baseline to Week 12

  5. Proportion of Participants With Corticosteroid-Free Composite Remission at Week 24

    Responder defined by meeting both: (1) the primary composite clinical-plus-biochemical remission endpoint at Week 24 (rectal bleeding subscore = 0; stool frequency subscore ≤1 with at least a 1-point decrease from baseline; fecal calprotectin ≤250 µg/g; and no rescue therapy, prohibited escalation, UC-related hospitalization, colectomy, or discontinuation for lack of efficacy through Week 24); and (2) no use of systemic or rectal corticosteroids (including budesonide-class) at any time between randomization and the Week 24 assessment. Corticosteroid exposure is captured from concomitant medication records and reconciled with rescue therapy documentation. Participants not meeting either criterion, or with missing Week 24 data, are counted as non-responders (non-responder imputation). Higher proportion = greater treatment benefit. Analyzed in the intention-to-treat population using stratified Cochran-Mantel-Haenszel; effect estimate is absolute risk difference (Newcombe 95% CI).

    Time frame: Baseline to Week 24

  6. Change in Partial Mayo Score From Baseline to Week 24

    Continuous endpoint quantifying treatment effect on clinical disease activity. The partial Mayo score is the sum of three Mayo subscores - stool frequency (0-3, lower = fewer stools above the participant's normal), rectal bleeding (0-3, lower = less bleeding; 0 = no blood seen), and physician global assessment (0-3, lower = less overall disease severity in the physician's judgment) - yielding a total score from 0 to 9, with lower scores indicating less disease activity. Assessed at baseline and Week 24. Treatment effect is summarized as the least-squares mean difference between active and placebo in change from baseline to Week 24 with 95% confidence interval, derived from a mixed model for repeated measures with treatment, visit, treatment-by-visit interaction, baseline partial Mayo, and randomization stratification factors as fixed effects. A more negative change indicates greater reduction in disease activity; a between-arm difference favoring active = greater treatment benefit.

    Time frame: Baseline to Week 24

  7. Change in Inflammatory Bowel Disease Questionnaire-32 Total Score From Baseline to Week 24

    Continuous endpoint quantifying treatment effect on disease-specific quality of life. The Inflammatory Bowel Disease Questionnaire-32 (IBDQ-32) is a 32-item validated patient-reported instrument covering four domains: bowel symptoms, systemic symptoms, emotional function, and social function. Each item is rated 1-7 (1 = worst, 7 = best); the total score ranges from 32 to 224, with higher scores indicating better quality of life. A change of 16 points or more is generally considered clinically meaningful. A locally validated Turkish translation is administered at baseline and Week 24. Treatment effect is summarized as the least-squares mean difference between active and placebo in change from baseline to Week 24 with 95% confidence interval, derived from a mixed model for repeated measures with treatment, visit, treatment-by-visit interaction, baseline IBDQ-32, and randomization stratification factors as fixed effects. A larger positive change in the active arm = greater benefit.

    Time frame: Baseline to Week 24

  8. Change in C-Reactive Protein From Baseline to Week 24

    Continuous endpoint quantifying treatment effect on systemic inflammation. C-reactive protein (CRP) is a serum acute-phase reactant of hepatic origin, measured in mg/L by the central laboratory using a high-sensitivity assay at baseline and Week 24. Healthy adults typically have CRP \<3 mg/L; lower values indicate less systemic inflammation. Note that CRP can be normal in a sizeable subset of UC patients with active mucosal disease, particularly those with distal/left-sided disease. Values are log-transformed and the treatment effect is summarized as the geometric mean ratio of active vs placebo at Week 24 with 95% confidence interval, derived from a mixed model for repeated measures adjusting for log baseline CRP and randomization stratification factors. A ratio below 1 indicates greater reduction with active treatment.

    Time frame: Baseline to week 24

  9. Incidence of Treatment-Emergent Adverse Events

    Safety endpoint summarizing the cumulative incidence and exposure-adjusted rates of adverse events over the treatment period. A treatment-emergent adverse event (TEAE) is any adverse event with onset, or worsening, on or after the first dose of study product through 4 weeks after the last dose. Reported by treatment arm: number and proportion of participants with any TEAE; any serious adverse event (SAE); any TEAE leading to study product discontinuation; and any adverse event of special interest (AESI). AESI: new-onset Clostridioides difficile infection; serious enteric or opportunistic infection; UC worsening requiring hospitalization; colectomy; hepatobiliary events; severe allergic or anaphylactic reactions; gastrointestinal perforation; death. Coded with MedDRA (version current at database lock); severity graded per CTCAE v5.0; relatedness assessed by the investigator. Higher numbers and proportions indicate more frequent events.

    Time frame: From first dose through 4 weeks after the last dose (up to approximately Week 28)

  10. Change in Stool Microbiome Composition From Baseline to Weeks 12 and 24

    Exploratory endpoint characterizing treatment-associated shifts in gut microbial communities. Stool samples are collected at baseline, Week 12, and Week 24 under a harmonized SOP and processed centrally. Sequencing is by 16S rRNA gene profiling and/or shotgun metagenomics (final choice locked in the microbiome analysis plan before database lock), with negative controls, mock communities, and batch randomization. Outputs include alpha diversity (Shannon index, Faith's phylogenetic diversity; higher = more diverse), beta diversity (Aitchison and weighted/unweighted UniFrac distances; quantifying between-sample compositional difference), differential abundance of taxa using compositionally appropriate transformations (CLR/ILR) with Benjamini-Hochberg false discovery rate control at q\<0.05, and treatment-associated taxonomic and functional shifts. As an exploratory endpoint, no formal hypothesis testing within the confirmatory hierarchy is performed.

    Time frame: Baseline, Week 12, and Week 24

07

Study locations

1 site
08

References and documents

Individual participant data

Plan to share: Yes — De-identified individual participant data underlying the published primary and key secondary results, together with the study protocol, statistical analysis plan, analytic code, and a redacted informed consent form, will be made available on reasonable request to qualified researchers via a data-access committee. Access decisions will be made in accordance with the scope of the original participant consent and applicable Turkish data-protection law (KVKK), as well as GDPR where applicable. Microbiome and metabolomics sequence data will be deposited in a public repository (the European Nucleotide Archive, the Sequence Read Archive, or DNA Data Bank of Japan), subject to participant consent and applicable regulations. Requests will be considered for the purpose of scientific replication, secondary analyses, and individual participant data meta-analyses, consistent with the consent provided by participants. Data will be made available beginning 9 months after publication of the primary re

Supporting information: Study protocol, Statistical analysis plan, Clinical study report

Time frame: Beginning 9 months and ending 36 months following publication of the primary results.

Access criteria: Requests will be reviewed by the sponsor's independent data-access committee. Data will be shared under a signed data-access agreement. Proposed analyses must be consistent with the scope of the original participant consent and applicable Turkish (KVKK) and EU (GDPR) data-protection regulations. Priority will be given to requests for scientific replication, secondary analyses, and individual participant data meta-analyses.

No publications or documents are linked to this record.

09

Timeline

1 registry update since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedDate before it movedWhere the date was before it movedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Start is estimated for Oct 2026; primary completion for Dec 2027, 14 months later.

Of 236 interventional studies with no phase under Colitis, Ulcerative, half reached primary completion within 34 months of starting (the median), counting those still running; a quarter within 16 and three quarters within 54. This study's planned 14 months is below that.

Since we started tracking on Sep 25, 2026, the dates moved once, on Sep 30, 2026: start Jun 2026 → Oct 2026, primary completion May 2027 → Dec 2027 and completion Nov 2027 → Apr 2028.

Earlier changes are on the record history on ClinicalTrials.gov ↗

How these figures are worked out, and which studies are left out of them.

Registered
May 26, 2026
First posted
Jun 2, 2026
StartEst.
Oct 10, 2026was Jun 2026
Primary completionEst.
Dec 30, 2027was May 2027
CompletionEst.
Apr 30, 2028was Nov 2027
Last update
Sep 30, 2026
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
Status
Recruiting→Not yet recruiting
changed Sep 30, 2026
Start date
Jun 10, 2026→Oct 10, 2026
Sep 30, 2026
Primary completion
May 30, 2027→Dec 30, 2027
Sep 30, 2026
Study completion
Nov 30, 2027→Apr 30, 2028
Sep 30, 2026
Show all 1 update
  1. Sep 30, 2026
    Recruiting→Not yet recruiting
    Start date Jun 10, 2026→Oct 10, 2026
    Primary completion May 30, 2027→Dec 30, 2027
    Study completion Nov 30, 2027→Apr 30, 2028
    + 1 other change: site details

From the registry record's own update history. This site started tracking changes on Sep 25, 2026; for anything earlier, see the record history on ClinicalTrials.gov ↗

10

Registry details

Key details

Study ID
NCT07619638
Lead sponsor
ENBIOSIS BIOTECHNOLOGIES
Collaborators
Aydin Adnan Menderes University, Ege University Medical School, Dokuz Eylul University, Tepecik Training and Research Hospital
Responsible party
Varol TUNALI (Chief Medical Officer (CMO), ENBIOSIS BIOTECHNOLOGIES) — Principal investigator
First posted
Jun 2, 2026
Start date
Oct 10, 2026 (estimated)
Primary completion
Dec 30, 2027 (estimated)
Completion
Apr 30, 2028 (estimated)
Last update
Sep 30, 2026

Study contacts

Varol TUNALI, Dr.
Contact
vtunali@enbiosis.com
+905556303231
Varol TUNALI
principal investigator · Enbiosis Biotechnology Limited

Oversight

Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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