- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT05562310
Phenylalanine, Methionine and Histidine Requirements in TPN Fed Neonates
Phenylalanine, Methionine and Histidine Requirements in Total Parenteral Nutrition (TPN) Fed Neonates
This is a single center project assessing the requirements for three essential amino acids in TPN fed neonates. Using the Carbon Oxidation method (indicator amino oxidation and direct amino acid oxidation method), the investigators will determine the requirement of each of the 3 amino acids. The investigators will first determine the requirement for Phenylalanine, then Methionine and finally Histidine. The investigators will recruit 18 - 20 babies per amino acid study. Breath and urine samples will be collected to determine the oxidation of the indicator amino acid. The response of the indicator amino acid to changes in intake of the test amino acid (phenylalanine, methionine, and histidine) will be analyzed by bi-phase linear mixed effect model to determine the breakpoint or mean requirement for each amino acid.
It is hypothesized that the requirement for phenylalanine, methionine and histidine will be at least 50% lower than what is currently available in commercial amino acids solutions used for TPN feeding of neonates.
Study Overview
Status
Intervention / Treatment
Detailed Description
The study is based on the carbon oxidation protocol. Each baby will receive one or two levels of either phenylalanine or methionine or histidine. Each level will be assessed over a two-day period.
On day 1: each baby will receive a standard pediatric amino acid solution, Primene used in the NICU and L-[1-13C]Na Bicarbonate will be given to measure carbon dioxide production. On day 2: he/she will receive the appropriate TPN Test Solution made up of the appropriate Bulk Amino Acid solution (for Phenylalanine/ Methionine/ Histidine Studies) with a different amount of the amino acid being investigated. To see how these amino acids are used in the body the investigators will add a small amount (calculated based on the body weight of the baby) of the amino acid L-[1-13C]phenylalanine to the amino acid solution. Breath and urine will be collected from the baby to study the oxidation of the L -[1-13C]phenylalanine. The investigators will take 2 x 0.75 ml blood to measure plasma amino acid concentration. The investigators will aim to coordinate blood taking with regular blood work done for clinical monitoring.
Study Type
Enrollment (Estimated)
Phase
- Not Applicable
Contacts and Locations
Study Contact
- Name: Mahroukh Rafii
- Phone Number: 6472151201
- Email: mahroukh.rafii@sickkids.ca
Study Contact Backup
- Name: Glenda Courtney-Martin
- Phone Number: 4168135744
- Email: glenda.courtney-martin@sickkids.ca
Study Locations
-
-
Ontario
-
Toronto, Ontario, Canada, M5G 1X8
- Recruiting
- Glenda Courtney-Martin
-
Contact:
- Glenda Courtney-Martin
- Phone Number: 4168135744
- Email: glenda.courtney-martin@sickkids.ca
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Description
Inclusion Criteria:
- Stable preterm babies that are growing and fully TPN fed (at least 90% of calories and protein).
- TPN providing adequate calories and protein as determined by attending physician and dietitian.
- Babies born ≥ 28 weeks gestation,
- ≤ 28 days chronological age at the time of the study,
- Birth weight and length appropriate for gestational age,
- Medically stable as determined by normal blood results and lack of a fever or infection,
- At least 3 days after surgery, if the baby had a surgery.
Exclusion Criteria:
- Babies on mechanical ventilation, on low flow oxygen and CPAP.
- Small for gestational age,
- On medications known to affect protein and amino acid metabolism,
- Documented infection, fever
- Unstable medical condition
- Receiving enteral feeding providing > 10% of protein intake.
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Other
- Allocation: N/A
- Interventional Model: Single Group Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: Phenylalanine, methionine, histidine requirement
|
phenylalanine, methionine and histidine intakes will be varied in the TPN solutions to study the requirements for each of these amino acids in neonates that are TPN fed.
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Amino acid oxidation using a labelled amino acid.
Time Frame: 48 hrs
|
Breath samples will be collected and analyzed to determine the amount of amino acid oxidized.
This will be used to determine the amount retained in the body and therefore the amount that is required for protein synthesis.
|
48 hrs
|
Collaborators and Investigators
Sponsor
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Estimated)
Study Completion (Estimated)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Other Study ID Numbers
- 1000076474
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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