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Necrotizing EnterocolitisPhase 1/2NECNCT06315738

Study to Assess the Safety, Tolerability, and Preliminary Efficacy of ST266 in Infants With Necrotizing Enterocolitis (NEC)

A Phase 1/2 study testing ST266 in people with Necrotizing Enterocolitis, run by Noveome Biotherapeutics, formerly Stemnion at 8 sites 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 primary objective of this study is to determine the safety and tolerability of two dose levels (0.5 mL/kg and 1.0 mL/kg) of once daily (QD) via IV route of administration of ST266 in treating patients with Bell's stage IIA or higher medical NEC by incidence of treatment emergent adverse events (TEAEs) and SAEs… Read more about this study

Who is it for?
Ages 2 to 8 weeks
Conditions the study is for
Necrotizing Enterocolitis
What is being tested?
ST266
Could I receive a placebo?
No, everyone receives an active treatment
How many people
36 participants
Where
8 sitesUnited States
Study dates
19 Aug 2024to Nov 2029
Phase
Phase 1/2
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 2 to 8 weeks
  • All sexes
  • No healthy volunteers
  • Child

Who may be able to join

  • Infants born from ≥22 weeks gestational age up to and including 40 weeks gestational age; up to 40 weeks postmenstrual age (gestational age plus chronological age in terms of weeks) with current weight at diagnosis of NEC between ≥500g and ≤3000g, as a result of prematurity and/or IUGR. Parent(s)/legal medical representative(s) voluntarily provides written consent prior to study enrollment.
  • Bell's Stage IIA or higher medical NEC (Stages IIA - IIIA only) diagnosis by radiologic confirmed pneumatosis intestinalis and may include intestinal dilation and ileus. The clinician confirms NEC diagnosis by evaluation of the radiologic imaging for confirmed pneumatosis intestinalis. If X-ray is used and is equivocal, an ultrasound (US) may be used, if available, to confirm pneumatosis. If the clinician (Neonatologist and/or Pediatric Surgeon) has differing interpretation from that of the Radiologist, that should be documented in both the medical and research records for accuracy of NEC diagnosis.

Who cannot join

  • Infants with abdominal perforation.
  • Not expected to survive ≥2 weeks or born with a lethal condition requiring hospice or palliative care (e.g., disease has progressed to NEC totalis, or patient has multi-organ system failure).
  • Born with major congenital anomalies such as cardiac defects (e.g., Tetralogy of Fallot) or chromosomal disorders/anomalies (e.g., neural tube defect).
  • Mother's receipt of any investigational product during pregnancy.
  • Infants with malignancies (e.g., neoplastic cell growth as a solid tumor or a blood neoplasm, such as congenital leukemia).
  • Infants with hypercoagulability disorders (any active thrombosis, diagnosis of disseminated intravascular coagulation or other acquired/inherited disorders (i.e., hemophilia) of coagulation.
Show all 16Show fewer
  • Infants with a known immunodeficiency (such as galactosemia or agranulocytosis).
  • Infants with anatomic defects that require surgical intervention.
  • Infants with persistent pulmonary hypertension of newborn.
  • Infants with any congenital or acquired gastrointestinal pathology that preclude feeds within 7 days after birth (e.g., duodenal atresia).
  • Infants who have hypoxic ischemic injury (perinatal asphyxia).
  • Infants with polycythemia (at time of treatment) (>22 g/dL).
  • Positive maternal human immunodeficiency virus status.
  • History of maternal drug abuse (such as amphetamines, opiates, cocaine). This does not include marijuana, or prescription medications for treatment of drug abuse.
  • Considered by the Investigator, for any reason, to be an unsuitable candidate for the study.
  • Infants diagnosed with NEC who will require immediate surgical intervention.

Trial locations and contacts

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

Karin Potoka, MD contact

412-512-1446

kpotoka@noveome.com

Shawna M Rose, BS contact

513-205-1091

srose@noveome.com

8 sites in 1 country

United States8 sites, 8 recruiting
  • NorthShore University-Evanston Hospital

    Evanston, Illinois, 60201

    Brandy Frost, MD, 773-562-7420, bfrost@northshore.org

    Brandy Frost, MD

    Recruiting
  • Penn State Health Milton S Hershey Medical Center/Penn State University College of Medicine

    Hershey, Pennsylvania, 17033

    Timothy Palmer, MD, 717-531-8413, tpalmer@pennstatehealth.psu.edu

    Timothy Palmer, MD

    Recruiting
  • Arkansas Children's Hospital

    Little Rock, Arkansas, 72202

    Vikas Chowdhary, MD, 501-364-1028, vchowdhary@uams.edu

    Vikas Chowdhary, MD

    Recruiting
  • University of Arkansas for Medical Sciences

    Little Rock, Arkansas, 72205

    Vikas Chowdhary, MD, 848-702-3188, vchowdhary@uams.edu

    Vikas Chowdhary, MD

    Recruiting
  • Yale-New Haven Hospital

    New Haven, Connecticut, 06510

    Sarah Taylor, MD, 203-688-2320, sarah.n.taylor@yale.edu

    Sarah Taylor, MD

    Recruiting
  • Oklahoma Children's Hospital

    Oklahoma City, Oklahoma, 73104

    Hala Chaaban, MD, 405-271-5215 ext. 42063, hala-chaaban@ouhsc.edu

    Hala Chaaban, MD

    Recruiting
  • University of Pittsburgh Medical Center Magee Womens Hospital

    Pittsburgh, Pennsylvania, 15219

    Toby Yanowitz, MD, 412-641-6260, yanotd@upmc.edu

    Toby Yanowitz, MD

    Recruiting
  • BayCare Health System-St. Joseph's Women's Hospital

    Tampa, Florida, 33607

    Jenelle Ferry, MD, 813-872-2924, jenelle.ferry@baycare.org

    Jenelle Ferry, MD

    Recruiting

Other trials in United States

About this study

Official title: Randomized, Controlled, Phase 1-2 Open Label Study of ST266 IV Administration to Assess the Safety, Tolerability, and Preliminary Efficacy of ST266 in Infants With Necrotizing Enterocolitis (NEC)

The primary objective of this study is to determine the safety and tolerability of two dose levels (0.5 mL/kg and 1.0 mL/kg) of once daily (QD) via IV route of administration of ST266 in treating patients with Bell's stage IIA or higher medical NEC by incidence of treatment emergent adverse events (TEAEs) and SAEs, with a secondary objective to assess preliminary efficacy of the same two dose levels (0.5 mL/kg and 1.0 mL/kg) of QD via IV route of administration of ST266 in treating patients with Bell's stage IIA or higher medical NEC.

Read the detailed description

This Phase 1-2 clinical trial is a randomized, controlled, open-label study using a modified sequential cohort design. Assignment to cohorts will be based on the following dosages and weight ranges: 0.5 mL/kg and 1.0 mL/kg; weight ≥1000 g and ≤3000 g, and weight ≥500 g and ≤999 g.

In each cohort, patients will be randomized to either ST266 + SOC or SOC alone. In the first cohort, the first three patients randomized to ST266 were staggered, where each patient completed their 10-day treatment period containing 10 treatment cycles and Day 28/1 Month follow-up visit and were evaluated by the Data Safety Monitoring Board (DSMB), before dosing of the next patient occurred. Patients randomized to SOC alone followed the treatment plan as dictated by the Investigator site SOC procedures and were evaluated for the same inclusion/exclusion criteria and selected endpoints for analysis. If for any reason a patient was withdrawn, the decision for replacement was determined by the DSMB.

Dosing for the next cohort will occur after review of safety data up to and including Day 28/1 Month post-treatment follow-up visit from all patients in Cohort 1. DSMB reviews will include comprehensive safety data analysis of data available at that time. In Cohorts 2, 3, and 4, only a single sentinel ST266-treated patient will be required to complete their 10-day treatment period containing 10 treatment cycles and Day 28/1 Month follow-up visit and be evaluated by the Data Safety Monitoring Board (DSMB), before dosing of the next patient occurs. Given that Cohort 2 shares the same weight range and Cohort 3 the same dose as Cohort 1, Cohorts 2 and 3 may be opened for enrollment in parallel. If any safety event occurs in either Cohort 2 or 3, the DSMB will promptly evaluate and determine whether to continue the study and/or reinstate patient staggering.

Being tested
ST266
Keywords
Necrotizing Enterocolitis, NEC
Medical subject headings
Enterocolitis, Necrotizing

What participants receive

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

  • ST266Biological

    Patients randomized to investigative drug product (ST266) will receive either 0.5 mL/kg or 1.0 mL/kg of ST266 QD in addition to Standard of Care treatment; Patients randomized to SOC will receive standard of care treatment only.

Study groups in NCT06315738
Study groupRoleWhat they receive
Cohort 1 - lower dose active + SOC treatment vs. SOC alone in higher weight rangeOtherInfants with weight at diagnosis of NEC ≥1000 g and ≤3000 g; 0.5 mL/kg of ST266, QD, + Standard of Care (SOC) treatment (n=6); SOC (n=3)
Receives: Biological: ST266
Cohort 2 - higher dose active + SOC treatment vs. SOC alone in higher weight rangeOtherInfants with weight at diagnosis of NEC ≥1000 g and ≤3000 g; 1.0 mL/kg of ST266, QD; + Standard of Care (SOC) treatment (n=6); SOC (n=3)
Receives: Biological: ST266
Cohort 3 - lower dose active + SOC treatment vs. SOC alone in lower weight rangeOtherInfants with weight at diagnosis of NEC ≥500 g and ≤999 g; 0.5 mL/kg of ST266, QD; + Standard of Care (SOC) treatment (n=6); SOC (n=3)
Receives: Biological: ST266
Cohort 4 - higher dose active + SOC treatment vs. SOC alone in lower weight rangeOtherInfants with weight at diagnosis of NEC ≥500 g and ≤999 g; 1.0 mL/kg of ST266, QD; + Standard of Care (SOC) treatment (n=6); SOC (n=3)
Receives: Biological: ST266

What is being measured

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

  1. Safety and Tolerability endpoint: incidence of adverse events

    Patients will be assessed for safety and tolerability of ST266 treatment given IV (two dose options: 0.5mL/kg or 1.0mL/kg) via review of treatment emergent adverse events (TEAEs). AEs are defined as per the International Neonatal Consortium (INC) neonatal AE severity scale (NAESS): Mild, Moderate, Severe, Life Threatening, Death. Relatedness to study drug (ST266) will also be assessed.

    Measured: From date of randomization through 24 months of age

  2. Safety and Tolerability endpoint: incidence of serious adverse events

    Patients will be assessed for safety and tolerability of ST266 treatment given IV (two dose options: 0.5mL/kg or 1.0mL/kg) via review of serious adverse events, defined as: any event that results in death, is immediately life-threatening, requires in-patient hospitalization or prolongation of existing hospitalization, results in persistent or significant disability or incapacity, or may jeopardize patient so that requires intervention to prevent prior noted outcomes (includes study drug related dose-limiting toxicities and infusion reactions)

    Measured: From date of randomization through 24 months of age

  3. Safety and Tolerability endpoint: Changes in labs and vitals relative to disease progression

    Patients will be assessed for safety and tolerability of ST266 treatment given IV (two dose options: 0.5mL/kg or 1.0mL/kg) by evaluating clinically significant changes in labs and vitals as to relatedness to disease progression and study drug effects, including assessment of vital signs (temperature, systolic and Mean arterial blood pressure (mmHg), respiratory rate, heart rate, and percent oxygen saturation as measured by pulse oximetry as noted in The Harriet Lane Handbook, 21st ed., 2018), and hematology and chemistry lab tests, which will be measured against standard laboratory acceptable ranges for premature infants.

    Measured: From date of randomization through 24 months of age

Secondary outcomes (4)
  1. Efficacy endpoint: Time to pneumatosis resolution

    Pneumatosis is considered resolved when no longer observed on abdominal x-ray

    Measured: From date of NEC diagnosis until resolved, up to 10 days

  2. Efficacy endpoint: Time to full enteral nutrition assessment

    Defined as no longer receiving total parenteral nutrition (TPN)

    Measured: From date of completion of antibiotics and/or IP treatment until full feeding tolerance reached, 3-5 days

  3. Efficacy endpoint: Incidence of abdominal surgical intervention

    Abdominal surgical intervention defined as laparotomy, including drain placement

    Measured: Assessed from Day 1/Baseline visit through 24 months of age

  4. Efficacy endpoint: Change in Neonatal Sequential Organ Failure Assessment (nSOFA) score

    nSOFA score is a neonatal sequential organ failure assessment of three organ systems: respiratory score criteria (range: 0-8); cardiovascular score criteria (range: 0-4); and Hematologic score criteria (range: 0-3) with a total score range: 0 (best) to 15 (worst)

    Measured: From Randomization/Day 1 through Day 10 of treatment period (10 days).

Timeline

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

  1. First posted18 Mar 2024
  2. Study start19 Aug 2024
  3. Primary completionJun 2029 (estimated)
  4. Study completionNov 2029 (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 1/2
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Sequential
Masking
None (open label)
Enrolment
36 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT06315738
Sponsor's protocol ID
ST266-NEC-201
Acronym
NEC
Status last verified
Apr 2026
First submitted
1 Mar 2024
Last updated
13 Apr 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 1/2 study testing ST266 in people with Necrotizing Enterocolitis, run by Noveome Biotherapeutics, formerly Stemnion at 8 sites 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 2 inclusion and 16 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 13 Apr 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 8 sites 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. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this combined phase mean?

Phase 1 studies test a treatment in a small group of people for the first time or in a new way, mainly to check safety and find the right dose.

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 Karin Potoka, MD (412-512-1446, kpotoka@noveome.com), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Safety and Tolerability endpoint: incidence of adverse events (time frame: From date of randomization through 24 months of age). The study lists 3 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 13 Apr 2026.

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