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NCT05003804CompletedPhase 1/2

Allergic Disease Onset Prevention Study

A Phase 1b/2, Randomized, Double-blind, Placebo-controlled, Multi-center Study of STMC-103H in Neonates and Infants at Risk for Developing Allergic Disease

Source: ClinicalTrials.gov · Last updated 20 Nov 2025

Brief summary (registry, in English)

This is a Phase 1b/2, randomized, double-blind, multi-center study to evaluate the safety, tolerability, and preliminary clinical efficacy of STMC-103H in neonates and infants at risk for developing allergic disease (Type 1 hypersensitivity). Subjects will be enrolled in a three-part sequential approach. Participants in the safety-run portion of the study (Part A1: 1 year to \<6 years of age and A2: 1 month to \<12 months of age) will receive 28 days of treatment with STMC-103H or placebo, followed by 28 days of follow-up. A Data and Safety Monitoring Committee (DSMC) will review safety data after all patients in each part complete 28 days of therapy prior to enrolling the next part. After A2, Part B will enroll 224 patients for 336 days of treatment with STMC-103H or placebo, followed by 336 days of follow-up. Stool, blood, and optional samples will be collected in Parts A2 and part B. Primary safety endpoints are frequency, type and severity of Adverse Events (AEs) and Serious Adverse Events (SAEs), as well as findings on physical exams, vitals, and safety laboratories. The primary efficacy endpoint is incidence of physician-diagnosed atopic dermatitis at day 336.

Status (registry)
Completed
Phase (registry)
Phase 1/2
Study type
Interventional
Enrollment
283 (actual)
First submitted
4 Aug 2021
Start date
1 Sept 2021
Primary completion date
26 Nov 2024
Lead sponsor
Siolta Therapeutics, Inc.
NCT number
NCT05003804

What you commit to

  • Study type: Interventional · Phase 1/2
  • Participants enrolled: 283
  • From 1 Sept 2021 to the primary completion date, 26 Nov 2024
  • 31 sites in 3 countries
  • Visits and tests: ask the trial team, the registry does not list them

Built from the registry fields of ClinicalTrials.gov. It describes the study, not your situation.

Who cannot take part

Copied verbatim from ClinicalTrials.gov and grouped by topic. Only the trial team decides who can take part.

Other illness

  • All Parts (A1, A2, B)
    • Subject's twin (or higher order multiple) is enrolled in STMC-103H-102
    • Subject has any congenital abnormalities or condition, significant disease, illness, physical exam finding, or disorder that, in the opinion of the PI, may put the subject at safety risk or is likely to hinder feeding or affect metabolism that may influence the results of the study. (Neonatal hyperbilirubinemia (jaundice), including jaundice that requires phototherapy, should not be considered exclusionary).
    • Subject is acutely ill or on systemic antibiotics at the time of enrollment
    • Subject is participating in another interventional clinical study involving investigational medication, formula, probiotic, or prebiotic use within 30 days (or five half-lives, whichever is longer) of this study
    • Subject has evidence of immune deficiency/immune compromise in the judgment of the investigator
    • Part B Only
  • 6 (B). Subject was born at \< 35 weeks' gestation 7 (B). Biological maternal medical condition during the pregnancy that, in the opinion of the PI, may put the subject at risk because of participation in the study. (Maternal antibiotics during the time of delivery should not be considered exclusionary.)

Who the study is looking for

  • All Parts (A1, A2, B)
    • Subject's parent(s)/legal representative(s) providing consent must be 18 years or older
    • Biological mother and/or biological father and/or full sibling(s), have a history of asthma, atopic dermatitis, food allergy, or allergic rhinitis as determined by the screening questionnaire
    • Subject's parent(s)/legal representative(s) (if appropriate according to local laws) is/are willing and able to give informed consent for participation in the study
    • Subject's parent(s)/legal representative(s) (if appropriate according to local laws) is/are willing and able, in the PI's opinion, to comply with all study requirements
    • Part A1 Only
  • 5 (A1). Subject is between 1 year and \< 6 years old at the time of enrollment
  • Part A2 Only
  • 5 (A2). Subject is between 28 days and \< 12 months of life at the time of enrollment 6 (A2). Subject's parent(s)/legal representative(s) do not plan to give probiotics (including infant formula that contain probiotics) to the subject during the trial
  • Part B Only
  • 5 (B). Subject is ≤ 14 days of life at the time of enrollment. Sites should make every effort to enroll newborns as soon as possible after birth.
  • 6 (B). Subject has a birthweight ≥ 2.5 kg and ≤ 4.5 kg 7 (B). Subject's parent(s)/legal representative(s) do not plan to give probiotics (including infant formula that contain probiotics) to the subject from the time of birth to the end of the trial.

Age in the registry: 0 days to 14 days · Sex: All · Accepts healthy volunteers

Full criteria on ClinicalTrials.gov

Sites (31)

Sites in registry order. Pick your city on the disease page to sort them by distance.

SiteCityCountrySite status
The Women's and Children's Hospital
Coordinator of this site? Confirm its status
AdelaideAustraliaUnknown status
Monash Children's Hospital
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ClaytonAustraliaUnknown status
Fiona Stanley Hospital
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MurdochAustraliaUnknown status
Murdoch Children's Research Institute
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ParkvilleAustraliaUnknown status
Queensland Children's Hospital
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South BrisbaneAustraliaUnknown status
The Children's Hospital at Westmead
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WestmeadAustraliaUnknown status
Centro de Neumologia Pediatrica
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CaguasPuerto RicoUnknown status
University of Michigan Health
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Ann ArborUnited StatesUnknown status
Children's Healthcare of Atlanta
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AtlantaUnited StatesUnknown status
Children's Hospital Colorado
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AuroraUnited StatesUnknown status
Dell Medical School at UT Austin
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AustinUnited StatesUnknown status
Johns Hopkins University School of Medicine
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Baltimore, MDUnited StatesUnknown status
Boston Children's Hospital
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BostonUnited StatesUnknown status
Lurie Children's Hospital
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ChicagoUnited StatesUnknown status
University of Chicago Medicine
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ChicagoUnited StatesUnknown status
Cincinnati Children's Hospital
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CincinnatiUnited StatesUnknown status
UT Southwestern/Children's Health
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DallasUnited StatesUnknown status
Northwell Healthcare
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Great NeckUnited StatesUnknown status
Tribe Clinical Research
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GreenvilleUnited StatesUnknown status
Riley Children's Health at University of Indiana
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IndianapolisUnited StatesUnknown status
Arkansas Children's Research Institute
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Little RockUnited StatesUnknown status
UCLA Health
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Los AngelesUnited StatesUnknown status
Univ. of Wisconsin-Madison/Jackson Research Group
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MadisonUnited StatesUnknown status
NYU Langone Fink Children's
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New YorkUnited StatesUnknown status
Mt. Sinai Jaffe Allergy Institute
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New YorkUnited StatesUnknown status
University of Rochester Medical Center
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RochesterUnited StatesUnknown status
Rady Children's Hospital - San Diego
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San DiegoUnited StatesUnknown status
UCSF Benioff Children's Hospital
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San FranciscoUnited StatesUnknown status
Seattle Allergy and Asthma Research Institute
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SeattleUnited StatesUnknown status
Coastal Pediatrics Research
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SummervilleUnited StatesUnknown status
University of Arizona - Health Sciences
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TucsonUnited StatesUnknown status

This page is information, not medical advice. Discuss any trial with your doctor.