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Ventricular Septal DefectPhase 3NCT05253209

A Study Evaluating the Efficacy and Safety of IV L-Citrulline for the Prevention of Clinical Sequelae of Acute Lung Injury Induced by Cardiopulmonary Bypass in Pediatric Patients Undergoing Surgery for Congenital Heart Defects

A Phase 3 study testing L-citrulline and Plasmalyte A in people with Ventricular Septal Defect and Atrioventricular Septal Defect, run by Asklepion Pharmaceuticals, LLC at 10 sites in United States.

Terminated

Stopped early. The study ended before it was planned to and will not resume.

Official record
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Trial summary

This is a randomized, double-blind, placebo controlled, multicenter study to compare the efficacy and safety of L-citrulline versus placebo in patients undergoing surgery for congenital heart defects. Read more about this study

Who is it for?
Ages Up to 18 years
What is being tested?
L-citrulline and Plasmalyte A
Type of treatment
Injection or infusion
Could I receive a placebo?
Yes, some participants may receive a placebo
How many people
64 participants
Where
10 sitesUnited States
Study dates
29 Jun 2022to 10 May 2024
Phase
Phase 3
Are there results?
None posted in the registry

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 Up to 18 years
  • All sexes
  • No healthy volunteers
  • Child, Adult

Who may be able to join

  • Patients, parents, or legal guardian willing and able to sign informed consent
  • Male and female subjects aged ≤18 years of age (females of child-bearing potential willing to practice an acceptable form of birth control)
  • Patients undergoing cardiopulmonary bypass for repair of a large unrestrictive ventricular septal defect, an ostium primum/secundum atrial septal defect, or a partial or complete atrioventricular septal defect
  • Pre-operative echocardiogram confirming cardiovascular anatomy and defect to be repaired

Who cannot join

  • Evidence of pulmonary artery or vein abnormalities that will not be addressed surgically. Specific abnormalities excluded include:
  • significant pulmonary artery narrowing not amenable to surgical correction
  • previous pulmonary artery stent placement
  • significant left sided AV valve regurgitation not amenable to surgical correction
  • pulmonary venous return abnormalities not amenable to surgical correction
  • pulmonary vein stenosis not amenable to surgical correction
Show all 12Show fewer
  • Preoperative requirement for mechanical ventilation or IV inotrope support
  • Presence of fixed or idiopathic pulmonary hypertension (i.e. Eisenmenger's Syndrome) prior to surgical repair
  • Pre-operative use of medications to treat pulmonary hypertension
  • Pregnancy; Sexually active females of child-bearing potential must be willing to practice an acceptable method of birth control for the duration of study participation (e.g. oral contraceptive, hormonal implant, intra-uterine device)
  • Participation in another clinical trial within 30 days of Screening or while participating in the current study, including the 28 days of follow-up post study drug administration.
  • Any condition which, in the opinion of the investigator, might interfere with the study objectives

Trial locations and contacts

10 sites in 1 country.

10 sites in 1 country

United States10 sites
  • Children's Hospital of Colorado

    Aurora, Colorado, 80045

  • Children's of Alabama

    Birmingham, Alabama, 35233

  • Heart Center, Ann & Robert H. Lurie Children's Hospital of Chicago

    Chicago, Illinois, 60611-2605

  • Cincinnati Children's Hospital Medical Center

    Cincinnati, Ohio, 45229

  • Nationwide Children's Hospital- The Heart Center

    Columbus, Ohio, 43215

  • Duke University Medical Center Surgical Office of Clinical Research (SOCR)

    Durham, North Carolina, 27710

  • Riley Hospital for Children at Indiana University Health

    Indianapolis, Indiana, 46202

  • University of Wisconsin-Madison

    Madison, Wisconsin, 53792-4108

  • Seattle Children's Research Institute

    Seattle, Washington, 98105

  • Cardinal Glennon Children's Hospital

    St Louis, Missouri, 63104

Other trials in United States

About this study

Official title: A Phase III Double-Blind, Randomized, Placebo Controlled, Multi Center Clinical Study to Evaluate the Efficacy and Safety of Intravenous L-Citrulline for the Prevention of Clinical Sequelae of Acute Lung Injury Induced by Cardiopulmonary Bypass in Pediatric Patients Undergoing Surgery for Congenital Heart Defects

This is a randomized, double-blind, placebo controlled, multicenter study to compare the efficacy and safety of L-citrulline versus placebo in patients undergoing surgery for congenital heart defects. Eligible patients undergoing repair of a large unrestrictive ventricular septal defect (VSD), a partial or complete atrioventricular septal defect (AVSD), or an ostium primum atrial septal defect (primum ASD) will be eligible for enrollment.

Read the detailed description

This is a randomized, double-blind, placebo controlled, multicenter study that will compare the efficacy and safety of L- citrulline versus placebo in patients undergoing surgery for congenital heart defects. Eligible patients undergoing repair of a large unrestrictive ventricular septal defect (VSD), a partial or complete atrioventricular septal defect (AVSD), or an ostium primum atrial septal defect (primum ASD) will be eligible for enrollment.

Each enrolled patient will be randomized to receive either L citrulline or placebo throughout all administrations in the study. Patients will receive:

  1. an L-citrulline bolus of 150 mg/kg or placebo at the initiation of cardiopulmonary bypass
  2. the addition L-citrulline or placebo to maintain a steady state target concentration of approximately 100 μmol/L of L-Citrulline or placebo during cardiopulmonary bypass
  3. an L-citrulline bolus of 10 mg/kg or placebo 30 minutes after decannulation from cardiopulmonary bypass, followed immediately by a 9 mg/kg/hour continuous L-citrulline infusion or placebo for up to 48 hours post-first dose. The infusion rate will be adjusted (up or down titration of drug infusion) to achieve a target steady state concentration of 100 µmol/L.

The study drug or placebo infusion will be discontinued once invasive arterial blood pressure monitoring is discontinued or at 48 hours, whichever occurs first. Patients will be followed until Day 28 or discharge from the hospital, whichever occurs first. For patients discharged prior to Day 28, a final assessment via telephone will be conducted at Day 28.

Being tested
L-citrulline, Plasmalyte A
Medical subject headings
Heart Septal Defects, Ventricular, Atrioventricular Septal Defect, Partial atrioventricular canal

What participants receive

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

  • L-citrullineDrug

    Intravenous L-citrulline given for up to 48 hours

  • Plasmalyte ADrug

    Intravenous Plasmalyte A given for up to 48 hours

Study groups in NCT05253209
Study groupRoleWhat they receive
ActiveExperimentalPatients will receive: 1. an L-citrulline bolus of 150 mg/kg at the initiation of cardiopulmonary bypass 2. the addition L-citrulline to maintain a steady state target concentration of approximately 100 μmol/L of L-citrulline during cardiopulmonary bypass 3. an L-citrulline bolus of 10 mg/kg 30 minutes after decannulation from cardiopulmonary bypass, followed immediately by a 9 mg/kg/hour continuous L-citrulline infusion or placebo for up to 48 hours post-first dose. The infusion rate will be adjusted (up or down titration of drug infusion) to achieve a target steady state concentration of 100 μmol/L. Infusion will be discontinued once invasive arterial blood pressure monitoring is discontinued or at 48 hours, whichever occurs first.
Receives: Drug: L-citrulline
PlaceboPlacebo comparatorPlasmalyte A administered to the same schedule as the active treatment arm.
Receives: Drug: Plasmalyte A

What is being measured

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

  1. Post-operative need for mechanical ventilation

    Mechanical ventilation is defined as invasive and non-invasive mechanical ventilation including bilevel positive airway pressure (BPAP), continuous positive airway pressure (CPAP)

    Measured: Time in hours from separation from CPB until discontinuation of all mechanical ventilation including non-invasive support or Day 28, whichever occurs first

Secondary outcomes (32)
  1. Intubation

    Length of time on intubation

    Measured: From separation from bypass until discontinuation of intubation or Day 28, whichever occurs first

  2. Early extubation

    Frequency of extubation <12 hours after surgery

    Measured: From end of surgery until 12 hours post-surgery

  3. Positive pressure ventilation

    Length of time on non-invasive mechanical ventilation

    Measured: Time in hours from separation from CPB until discontinuation of all non-invasive mechanical ventilation or Day 28, whichever occurs first

  4. Duration of hospitalization

    Number of post-operative days until discharge from hospital

    Measured: From surgery until discharge from hospital or Day 28, whichever occurs first

  5. Use of inotropes

    Duration of inotrope use (e.g., dopamine, dobutamine, milrinone, epinephrine, phenylephrine and/or norepinephrine).

    Measured: Measured from first use until discharge or Day 28, whichever occurs first

  6. Use of vasodilators

    Duration of vasodilator use (e.g., nitroprusside, nitroglycerin, and nicardipine)

    Measured: Measured from first use until discharge or Day 28, whichever occurs first

  7. Duration of chest tube placement

    Total post-operative time chest tube is used

    Measured: From the end of the surgery to the time the chest tube is removed or Day 28, whichever occurs first

  8. Volume of chest tube drainage

    Total amount of chest tube drainage (mL)

    Measured: Duration of chest tube placement or Day 28, whichever occurs first

  9. Hemodynamic improvement (heart rate)

    Changes in heart rate measurements.

    Measured: 1, 2, 4, 12, 24, and 48 hours post-dose

  10. Hemodynamic improvement (systemic arterial blood pressure)

    Changes in systemic arterial systolic and diastolic blood pressure measurements.

    Measured: 1, 2, 4, 12, 24, and 48 hours post-dose

  11. Hemodynamic improvement (oxygen saturation)

    Changes in oxygen saturation measurements.

    Measured: 1, 2, 4, 12, 24, and 48 hours post-dose

  12. Hemodynamic improvement (central venous pressure)

    Changes in oxygen saturation measurements.

    Measured: 1, 2, 4, 12, 24, and 48 hours post-dose

  13. Hemodynamic improvement (pulmonary arterial pressure)

    Changes in PAP measurements (when available).

    Measured: 1, 2, 4, 12, 24, and 48 hours post-dose

  14. Arterial blood gasses (PaO2)

    Changes in PaO2 measurements

    Measured: Intra-operatively to Day 28

  15. Arterial blood gasses (PaCO2)

    Changes in PaCO2 measurements

    Measured: Intra-operatively to Day 28

  16. Arterial blood gasses (HCO3)

    Changes in HCO3 measurements

    Measured: Intra-operatively to Day 28

  17. Arterial blood gasses (pH)

    Changes in pH measurements

    Measured: Intra-operatively to Day 28

  18. Plasma levels of L-citrulline to assess PK-PD (exposure-response) relationship

    Measurement of plasma levels of L-citrulline

    Measured: Pre-surgery, 6, 12, 24 and 48 hours after first dose

  19. Health Economics: mechanical ventilation

    Measured as cost per day and expressed as incremental cost per quality adjusted life year (QALY) gained

    Measured: Total over duration of hospitalization or to Day 28 whichever occurs first

  20. Health Economics: duration of hospitalisation

    Measured as total cost of hospitalisation expressed as incremental cost per quality adjusted life year (QALY) gained

    Measured: Total over duration of hospitalization or to Day 28 whichever occurs first

  21. Adverse events

    Incidence of adverse events and serious adverse events

    Measured: Pre-operatively until Day 28

  22. Incidence of refractory hypotension

    Number of subjects with any refractory hypotension. Defined as a drop of >20% in mean arterial pressure for >30 minutes.

    Measured: From the end of surgery until 48 hours after first dose

  23. Clinical laboratory values (Blood Hemoglobin and Total Bilirubin)

    Absolute values and the absolute and percentage changes from baseline.

    Measured: Intra-operatively, Days 1, 2 and 28

  24. Clinical laboratory values (Blood Haematocrit)

    Absolute values and the absolute and percentage changes from baseline.

    Measured: Intra-operatively, Days 1, 2 and 28

  25. Clinical laboratory values (Red Blood Cell Count)

    Absolute values and the absolute and percentage changes from baseline.

    Measured: Intra-operatively, Days 1, 2 and 28

  26. Clinical laboratory values (White Blood Cell Count)

    Absolute values and the absolute and percentage changes from baseline.

    Measured: Intra-operatively, Days 1, 2 and 28

  27. Clinical laboratory values (Blood Platelet Count)

    Absolute values and the absolute and percentage changes from baseline.

    Measured: Intra-operatively, Days 1, 2 and 28

  28. Clinical laboratory values (Blood Sodium, Potassium, Calcium, Magnesium, Chloride)

    Absolute values and the absolute and percentage changes from baseline.

    Measured: Intra-operatively, Days 1, 2 and 28

  29. Clinical laboratory values (Blood Urea Nitrogen and Creatinine)

    Absolute values and the absolute and percentage changes from baseline.

    Measured: Intra-operatively, Days 1, 2 and 28

  30. Clinical laboratory values (Blood Alkaline Phosphatase, Aspartate Aminotransferase, Alanine Aminotransferase)

    Absolute values and the absolute and percentage changes from baseline.

    Measured: Intra-operatively, Days 1, 2 and 28

  31. Clinical laboratory values (Blood Lactate Dehydrogenase)

    Absolute values and the absolute and percentage changes from baseline.

    Measured: Intra-operatively, Days 1, 2 and 28

  32. Clinical laboratory values (Blood Activated Clotting Time)

    Absolute values and the absolute and percentage changes from baseline.

    Measured: Intra-operatively, Days 1, 2 and 28

Timeline

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

  1. First posted23 Feb 2022
  2. Study start29 Jun 2022
  3. Primary completion10 May 2024
  4. Study completion10 May 2024

Why it stopped: Interim Analysis triggered futility

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 3
Primary purpose
Prevention
Allocation
Randomised
Intervention model
Parallel groups
Masking
Quadruple blind
Who is masked
Participant, Care provider, Investigator, Outcomes assessor
Enrolment
64 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT05253209
Sponsor's protocol ID
CIT-CPB-003-02
Status last verified
Aug 2023
First submitted
24 Jan 2022
Last updated
19 Sep 2024
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
Yes
FDA-regulated device
No
Individual data sharing
Undecided

Questions about this trial

What is this clinical trial studying?

A Phase 3 study testing L-citrulline and Plasmalyte A in people with Ventricular Septal Defect and Atrioventricular Septal Defect, run by Asklepion Pharmaceuticals, LLC at 10 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 4 inclusion and 12 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: stopped early, as of the sponsor's last update on 19 Sep 2024. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 10 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. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 3 studies compare the treatment with the current standard treatment or a placebo in a large group, to confirm how well it works and watch for side effects.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

The study was stopped early (reason given: Interim Analysis triggered futility). Results are not available in the source record.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Post-operative need for mechanical ventilation (time frame: Time in hours from separation from CPB until discontinuation of all mechanical ventilation including non-invasive support or Day 28, whichever occurs first). 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 19 Sep 2024.

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