NCT06315738 · Noveome Biotherapeutics, formerly Stemnion
Study to Assess the Safety, Tolerability, and Preliminary Efficacy of ST266 in Infants With Necrotizing Enterocolitis
What this study is about
The primary objective of this study is to determine the safety and how well patients handle the treatment of two dose levels (0.5 mL/kg and 1.
View original scientific description
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.
Interventions
BIOLOGICAL
ST266
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.
Primary outcome measures
Safety and Tolerability endpoint: incidence of adverse events
Time frame: From date of randomization through 24 months of age
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.
Safety and Tolerability endpoint: incidence of serious adverse events
Time frame: From date of randomization through 24 months of age
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)
Safety and Tolerability endpoint: Changes in labs and vitals relative to disease progression
Time frame: From date of randomization through 24 months of age
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.
Who can participate
This study lists these criteria on ClinicalTrials.gov. A study coordinator reviews eligibility during screening — this page does not determine whether you qualify.
Inclusion criteria
- Infants born from ≥26 weeks gestational age to 40 weeks gestational age; up to 40 weeks postmenstrual gestational age (gestational age plus chronological age in terms of weeks) with current weight at diagnosis of NEC between ≥800g and ≤3000g as a result of prematurity and/or IUGR. Parent(s)/legal medical representative(s) voluntarily provides written consent prior to study enrollment. 2. Minimum Bell stage IIA NEC diagnosis by radiologic confirmed pneumatosis intestinalis and may include intestinal dilation and ileus.
Exclusion criteria
- Infants with abdominal perforation at less than 10 days of life 2. 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). 3. Born with major congenital anomalies such as cardiac defects (e.g., Tetralogy of Fallot) or chromosomal disorders/anomalies (e.g., neural tube defect). 4. Mother's r
Where
- Little Rock, Arkansas
- New Haven, Connecticut
- Tampa, Florida
- Evanston, Illinois
- Oklahoma City, Oklahoma
- Hershey, Pennsylvania
- Pittsburgh, Pennsylvania
Collaborators
Parexel
Related conditions & keywords
Frequently asked questions
What is a clinical trial?
A clinical trial is a research study that tests new medical treatments, drugs, devices, or procedures to determine their safety and effectiveness. Trials are carefully designed and monitored to protect participants while advancing medical knowledge.
Is it safe to participate?
Clinical trials follow strict safety guidelines and ethical standards. Trials must be reviewed and approved, and participants are closely monitored by medical professionals throughout the study. You can withdraw at any time if you choose.
Will I be compensated?
Many clinical trials offer compensation for your time, travel expenses, and inconvenience. The specific compensation varies by study and will be discussed during the screening process. All study-related medical care is typically provided at no cost to participants.
Will I receive a placebo instead of treatment?
When effective treatment exists, participants typically receive either the standard treatment plus the study intervention, or the standard treatment plus placebo. You would not be denied effective care. Placebos are primarily used when no proven treatment is available, or in addition to standard care. Your trial consent form will clearly explain what treatments you may receive.
Can I leave a trial if I change my mind?
Absolutely. Participation in clinical trials is completely voluntary. You have the right to withdraw from the study at any time, for any reason, without penalty or loss of benefits to which you are otherwise entitled.
How long does a clinical trial last?
Trial duration varies widely depending on the study design and purpose. Some trials last just a few weeks, while others may continue for months or years. The study coordinator will provide specific timeline information during your screening call.
Data: ClinicalTrials.gov · synced Apr 13, 2026 · Source of record for eligibility and locations