Familial Fecal Microbiota Transplant for the Treatment of Subjects With Autism Spectrum Disorders

Phase 1

Not yet recruiting

• Conditions: Autism Spectrum Disorder; Autism
• Interventions: Biological: Fecal Microbiota Transplant

• Registration Number: NCT04630847
• Lead Sponsor: ProgenaBiome

Brief Summary

This is an open-label clinical trial to evaluate the benefits of familial fecal microbiota transplant following a 6-week treatment with Vancomycin in adult subjects with ASD for treatment of social deficits and language delays.

Detailed Description

This is an open-label clinical trial to evaluate the benefits of familial fecal microbiota transplant following a 6-week treatment with Vancomycin in adult subjects with ASD for treatment of social deficits and language delays. Participants are given FMT by colonoscopy

Study Timeline

• Study First Submitted: 2020-11-11
• Study First Submitted QC: 2020-11-11
• Study First Posted: 2020-11-16
• Status Verified: 2025-09
• Last Update Submitted: 2025-09-18
• Last Update Posted: 2025-09-23
• Study Start: 2025-12-01
• Primary Completion: 2026-12
• Study Completion: 2027-07-01

Recruitment & Eligibility

• Status: NOT_YET_RECRUITING
• Sex: All
• Target Recruitment: 10

Inclusion Criteria

1. Subject at least six years of age.
2. Subject has confirmed diagnosis of ASD based on the DSM-V.
3. Subject with ASD whose parents/caregiver/guardian/LAR can complete informed consent process.
4. A reliable parent or caregiver who can report the side effects and communicate effectively with the research team.
5. Comorbid gastrointestinal symptoms
6. Stable medications during the two months prior to enrollment.
7. Currently receiving interventions in the community or school for ASD.
8. If female and of childbearing potential, must be willing to utilize at least one highly effective method of birth control for the duration of the study. This includes oral birth control pills, contraceptive implants, and intra-uterine devices. Diaphragms and condoms are not considered highly effective. Subjects not of reproductive potential will be exempt (e.g., post-menopausal, surgically sterilized)
9. If male, and partner is of childbearing potential, must be willing to utilize at least one highly effective method of birth control for the duration of the study. This includes oral birth control pills, contraceptive implants, and intra-uterine devices Diaphragms and condoms are not considered highly effective. Subjects not of reproductive potential will be exempt (surgically sterilized)

Exclusion Criteria

1. Female subjects who are pregnant, nursing, or intend to become pregnant during the study period.
2. Subjects whose caregivers are unable/unwilling to cooperate with the protocol requirements.
3. Subject will be excluded who are suffering with Rett syndrome and Childhood Disintegrative Disorder.
4. Other serious co-morbid medical disorders affecting brain function and behavior, including uncontrolled seizures.
5. Subjects unable to refrain from taking non-study antibiotics for the period of the study.
6. Subjects diagnosed with cancer, except small localized basal cell carcinoma.
7. Subjects known to abuse alcohol or drugs.
8. Subjects who have undergone gastric bypass or total colectomy, or who are scheduled for these procedures.
9. Infection with HIV.
10. Infection with Hepatitis B or C.
11. Allergy to benzodiazepine.
12. Inability to stop loperamide, diphenoxylatye/atropine, or cholestyramine before the study
13. Unable to stop opiate treatment unless on a stable dose including PRN dosing, and no dose increase planned for the duration of the study
14. Known positive stool cultures for enteropathogens including, but not limited to Shigella, Salmonella, and Campylobacter within 30 days before enrollment. (These infection agents should be treated in advance of participation in this FMT study because they affect the good flora).
15. Known stool studies positive for ova and/or parasites in 30 days prior to enrollment. (Same as above).
16. Planned travel outside United States during study period.
17. Hypersensitivity to vancomycin
18. Renal insufficiency
19. Colitis

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
Autism Subjects	Fecal Microbiota Transplant	These subjects will be administered fecal microbiota transplant by colonoscopy

Primary Outcome Measures

Name	Time	Method
ATEC	52 Weeks	Number of participants with changes in the Autism Treatment Evaluation Checklist scores
QoLA	52 Weeks	Number of participants with changes in Quality of Life Autism scores
CARS-2	52 Weeks	Number of participants with changes in Childhood Autism Rating Scale 2 scores
SRS-2	52 weeks	Number of patients with changes in SRS-2 scores
Behavioral changes	52 weeks	Changes in reported incidence of disturbances in non-core aspects of behavior or function
GSRS	52 weeks	Number of patients with reported changes in GSRS measure of GI disturbances
abbrvCDAI	52 weeks	Number of patients with changes in abbrevCDAI scores
HSPP	52 weeks	Number of subjects with changes in quality of life metric HSPP

Secondary Outcome Measures

Name	Time	Method
Shannon Diversity Index	52 Weeks	Changes in Shannon Diversity index compared between pre and post FMT scores
Microbiome changes	52 weeks	Number of subjects with changes to microbiome relative abundance and composition

Trial Locations

Locations (1)

ProgenaBiome; 🇺🇸 Ventura, California, United States