ClinicalTrials.gg
Active, not recruitingNCT03426826Updated Nov 2, 2023

The Gut-Brain Study

A Phase 1 interventional study of FMT versus placebo in Autism Spectrum Disorder (ASD) and Gastro-Intestinal Disorder, sponsored by Children's Hospital Los Angeles. Active, not recruiting at 1 site in United States. Open to participants aged 5 Years to 17 Years. Per ClinicalTrials.gov, last updated 2023-11-02.

Sponsored by Children's Hospital Los Angeles · Phase 1, Interventional, and Treatment

From the registry’s dates

  • Primary completion was expected by Mar 2026, 8 months ago, but the record still lists the study as active, not recruiting.
Phase
Phase 1
Study type
Interventional
Enrollment
10
Allocation
Randomized
Ages
5 Years to 17 Years
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-12

Among 772 studies in Autism Spectrum Disorder with a site in United States — 165 open to participants now, 204 under way, 9 of them phase 3. Autism Spectrum Disorder · United States.

Planned enrollment
576th of 658
10 · median 50
Started
2019
with 59 others
Phase 1
44 of 772
8 open now
Primary completion
2026-03
later than 41 of 202 live
Registered
296th of 772
by date

Among the 772 studies in Autism Spectrum Disorder with a site in United States, this one is the 576th largest by planned enrollment of the 658 interventional ones that give a count, is one of 60 that started in 2019, is one of 44 in phase 1, reaches primary completion later than 41 of the 202 other live ones, and was the 296th registered.

Autism Spectrum Disorder

1,724 studies on the registry are indexed under Autism Spectrum Disorder; 500 are open to participants now.

Browse Autism Spectrum Disorder studies →

Open to participants now

165 of the 772 studies in Autism Spectrum Disorder with a site in United States are open now. Recruiting first, the newest first:

160 more — sign in →

All 165 open studies →

A study can be open while its sites in United States have not opened yet or have stopped. Only those recruiting at a site in United States →

Who these studies take

Of the 349 Autism Spectrum Disorder studies recruiting now, 48 (14%) set no upper age limit and 294 (84%) stop at 75 or younger; 297 take children under 18; 92 take healthy volunteers.

This study: 5 Years to 17 Years · all sexes · no healthy volunteers.

The full table on the hub →

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Watch this landscapeDownload CSVNarrow it in search →With an account: a weekly mail of what changed among 772 studies in Autism Spectrum Disorder with a site in United States, or all of them as a file.
02

Study summary

The purpose of this study is to find out if transplant of fecal matter (stool), also known as fecal microbiota transplantation (FMT), from a healthy person into the intestines of children and young adults with Autism Spectrum Disorder (ASD).

For this study children between the ages of 5-17years will be recruited over 2 years. Children will be recruited who receive an ASD diagnosis using the gold-standard Autism Diagnosis Observation Schedule -2 (ADOS-2) using module 1, 2 or 3 (none, limited or no moderate expressive language). Children diagnosed with these modules of the ADOS-2 may be at greater risk for GI disorders and rigid-compulsive behaviors. Additional assessment of rigid-compulsive behaviors and social communication will be done using the Repetitive Behavioral Scales-Revised (RBS-R) and Social Responsiveness Scale-2 (SRS-2), respectively. KBIT (the Kaufman Brief Intelligence Test) is used at baseline to obtain patient IQ. Total evaluation time is approximately 90 minutes. Following baseline symptom evaluation, a medical exam will be performed to determine whether each child is expressing specific GI symptoms. In addition, parents will fill out the Questionnaire for Pediatric Gastrointestinal Symptoms- Rome III (QPGS-III). Once an ASD diagnosis is confirmed, FMT treatment will be initiated, which typically occurs within 4-6 weeks of the initial diagnosis. Half 50% of the children (n=5) will receive the equivalent of 50 g of stools from a healthy donor into the jejunum through upper endoscopy and the other 50% off children (n=5) will receive Saline solution as Placebo control through upper endoscopy.

Subjects will have a total of 5 visits within 24 weeks including phone call follow up on Day 7 after FMT.

Read the detailed description

Nearly 1 in 60 children are diagnosed with ASD, a dramatic increase from the start of the 21st century. Although most children with ASD exhibit core social communication deficits, very limited interests, repetitive behaviors and sensory problems, the severity of symptoms and how well each child responds to standard behavioral therapies can vary tremendously from patient to patient. This makes it difficult to enact effective interventions. Other variables also influence the outcomes for ASD patients, including age at first diagnosis, access to care, the quality of treatments and the expertise of interventionists.

Children with ASD also have medical disturbances, which affects their quality of life and compliance in intervention programs. For example, approximately 40 percent of children with ASD have gastrointestinal disturbances (GIDs). Genetics plays a substantial role in risk, but scientists also have determined that non-heritable factors can trigger the expression and severity of ASD symptoms. Clinical research studies from PI laboratories have focused on the gut-brain link that influences ASD symptoms, how a child functions and even responds to interventions .

The investigators hypothesize that children with ASD will tolerate single endoscopic delivery of fecal transplant therapy which will modify their gut microbial profile leading to reduction of repetitive and rigid-compulsive behaviors, based on the Repetitive Behavioral Scales-Revised (RBS-R). Secondary outcomes include improved score in social responsiveness scale and gastrointestinal symptoms . Investigators propose a phase I safety study for the use of FMT in children with Autism Spectrum Disorder.

03

Conditions studied

  • Autism Spectrum Disorder (ASD)
  • Gastro-Intestinal Disorder

Keywords

  • FMT
  • Gut Microbiome
  • Fecal Microbiata Transplantation
  • Autism Spectrum Disorder
  • 16s rRNA
  • Gastro-Intestinal Disorder
04

Who can participate

Ages eligible
5 Years to 17 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

  • Age: 5-17 who have been diagnosed with non-syndromic ASD-s
  • Needs upper GI endoscopy
  • Clinical Assessment of ASD
  • ADOS validated diagnoses of ASD
  • Questionnaires: RBS-2 , KBIT, SRS, Rome III Version (QPGS- RIII), Ped QL, SSP

Exclusion criteria

Exclusion Criteria:

  • Subjects able to give consent/assent but unwilling to give /assent
  • Prematurity (\<36 weeks)
  • Pregnancy: testing will be done on FMT day 0 for subjects with
  • Subjects with significant renal and liver dysfunction (creatinine > 2 mg/dl and direct > 2 mg/dl)
  • Subjects with congenital or acquired immunodeficiency, or who are such as neoplastic disease or organ transplantation), have received or are receiving chemotherapy, or have been diagnosed with .
  • Subjects with syndromic disorders of defined genetic cause, and subjects who have severe sensory or motor problems (for example, blindness, deafness, seizures, cerebral palsy)
  • Subjects with severe food allergies
Terms in these criteria, in plain language(5)

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.

Bilirubin

A yellow substance made when red blood cells are broken down, which the liver clears. A high level can mean a problem with the liver or the bile ducts.

Criteria often allow more for people with Gilbert’s syndrome, a harmless inherited condition that raises bilirubin.

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.

HIV

The human immunodeficiency virus, which weakens the immune system.

Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.

05

Study design

Phase
Phase 1
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Quadruple (Participant, Care provider, Investigator, Outcomes assessor)
Enrollment
10 participants (estimated)

Study arms

  • Placebo comparator
    Arm 1

    Placebo Comparator placebo into the jejunum through upper endoscopy.

    Biological: FMT versus placebo

  • Active comparator
    Arm 2

    Active Comparator: Donor Stool Transplant Arm 2 will get FMT (Fecal Microbial Transplant) with Healthy Donor Stool into the jejunum through upper endoscopy.

    Biological: FMT versus placebo

Interventions

  • BiologicalFMT versus placebo

    Biological/Vaccine: Fecal Microbial Transplant versus placebo Fecal Transplant via endoscopy. Other Names: FMT

    Also known as: fecal microbial transplant vs placebo

06

What researchers measure

Primary outcomes

  1. Primary Outcome Measures, safety and tolerability

    The primary Outcome is safety of FMT and also it is measured by any symptom changes in obsessive/compulsive and repetitive behaviors using the RBS-R questionnaire.

    Time frame: 24 weeks

Secondary outcomes

  1. Secondary Outcome Measures, symptom improvement

    Secondary endpoints will include cognitive improvement using language use in a 10 minute interactive session, Social Responsiveness Scale-2. The SRS-2 is newly available (Western Psychological Services). It is a parent 65-item questionnaire that provides a continuous quantitative measure of three DSM domains, including social behavior, communication, and restricted and repetitive behaviors, normed in typically developing (T-score=50, sd=10) and ASD populations. The SRS-2 offers new DSM-5 subscales. The SRS is used in a variety of clinical and research settings. T-scores of 65 correlate highly with an ASD diagnosis, but do not substitute for the ADOS. Changes in SRS T-scores have been used as a measure of social behavior change over time.

    Time frame: 24 weeks

07

Study locations

1 site
  • Children's Hospital Los Angles
    Los Angeles, California 90027, United States
08

References and documents

Publications

  • Kang DW, Adams JB, Gregory AC, Borody T, Chittick L, Fasano A, Khoruts A, Geis E, Maldonado J, McDonough-Means S, Pollard EL, Roux S, Sadowsky MJ, Lipson KS, Sullivan MB, Caporaso JG, Krajmalnik-Brown R. Microbiota Transfer Therapy alters gut ecosystem and improves gastrointestinal and autism symptoms: an open-label study. Microbiome. 2017 Jan 23;5(1):10. doi: 10.1186/s40168-016-0225-7. PubMed 28122648 ↗
  • Luna RA, Oezguen N, Balderas M, Venkatachalam A, Runge JK, Versalovic J, Veenstra-VanderWeele J, Anderson GM, Savidge T, Williams KC. Distinct Microbiome-Neuroimmune Signatures Correlate With Functional Abdominal Pain in Children With Autism Spectrum Disorder. Cell Mol Gastroenterol Hepatol. 2016 Dec 11;3(2):218-230. doi: 10.1016/j.jcmgh.2016.11.008. eCollection 2017 Mar. PubMed 28275689 ↗
  • Gorrindo P, Williams KC, Lee EB, Walker LS, McGrew SG, Levitt P. Gastrointestinal dysfunction in autism: parental report, clinical evaluation, and associated factors. Autism Res. 2012 Apr;5(2):101-8. doi: 10.1002/aur.237. PubMed 22511450 ↗
  • Gorrindo P, Lane CJ, Lee EB, McLaughlin B, Levitt P. Enrichment of elevated plasma F2t-isoprostane levels in individuals with autism who are stratified by presence of gastrointestinal dysfunction. PLoS One. 2013 Jul 3;8(7):e68444. doi: 10.1371/journal.pone.0068444. Print 2013. PubMed 23844202 ↗
  • Yao MD, von Rosenvinge EC, Groden C, Mannon PJ. Multiple endoscopic biopsies in research subjects: safety results from a National Institutes of Health series. Gastrointest Endosc. 2009 Apr;69(4):906-10. doi: 10.1016/j.gie.2008.05.015. Epub 2009 Jan 10. PubMed 19136110 ↗
  • Hamilton MJ, Weingarden AR, Sadowsky MJ, Khoruts A. Standardized frozen preparation for transplantation of fecal microbiota for recurrent Clostridium difficile infection. Am J Gastroenterol. 2012 May;107(5):761-7. doi: 10.1038/ajg.2011.482. Epub 2012 Jan 31. PubMed 22290405 ↗
  • Finegold SM. Therapy and epidemiology of autism--clostridial spores as key elements. Med Hypotheses. 2008;70(3):508-11. doi: 10.1016/j.mehy.2007.07.019. Epub 2007 Sep 29. PubMed 17904761 ↗
  • Finegold SM. State of the art; microbiology in health and disease. Intestinal bacterial flora in autism. Anaerobe. 2011 Dec;17(6):367-8. doi: 10.1016/j.anaerobe.2011.03.007. Epub 2011 Apr 16. PubMed 21524713 ↗

Individual participant data

Plan to share: No

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar 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

Started Aug 2019 (actual). Primary completion is estimated for Mar 2026, 79 months after the start.

Of 35 phase 1 interventional studies under Autism Spectrum Disorder, half reached primary completion within 19 months of starting (the median), counting those still running; a quarter within 14 and three quarters within 27. This study's planned 79 months is above that.

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

Registered
Feb 2, 2018
First posted
Feb 8, 2018
StartActual
Aug 15, 2019
Primary completionEst.
Mar 2026
CompletionEst.
Jun 2026
Last update
Nov 2, 2023
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.
No changes since tracking began. The registry record was last updated on Nov 2, 2023, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT03426826
Responsible party
Sonia Michail, MD (Physician /Professor of Clinical Pediatrics, Children's Hospital Los Angeles) — Principal investigator
First posted
Feb 8, 2018
Start date
Aug 15, 2019
Primary completion
Mar 2026 (estimated)
Completion
Jun 2026 (estimated)
Last update
Nov 2, 2023

Study contacts

Sonia Michail, MD
principal investigator · Children's Hospital Los Angeles
Pat Levitt, Ph.D
principal investigator · Children's Hospital Los Angeles

Oversight

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

Not currently enrolling

This study is active, not recruiting, as verified in Oct 2023. You cannot join it, but the record below documents what was studied.

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