Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
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RECRUITING
NA
50 participants
INTERVENTIONAL
2022-06-24
2026-09-30
Brief Summary
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Detailed Description
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Subjects will be asked to arrive in the fasted state on all study days. Fasting prior to screening is not required. On the screening day, body weight, height, and body composition by Dual-energy X-ray absorptiometry (DXA) will be measured. In addition, The Six-Minute Walk Test (6MWT) and skeletal muscle function tests will be assessed at the end of each screening visit.
Each study visit will begin with vital signs. Before administration of the feeding or the tracer solution, baseline blood will be collected for measurement of the natural enrichment of metabolites. After the baseline sample is collected, feeding will begin and will be followed by tracers of several compounds that may be administered by IV pulse.
Next, the subjects will be fed one of six liquid nutritional supplement every 20 minutes for 6 hours. The liquid nutrition supplement will target the amino acid formulation in the following meals (1) total amino acid, (2) Essential Amino Acids (EAA), (3) EAA + -hydroxy -methylbutyric acid (HMB), (4) EAA + leucine (LEU), (5) EAA high, and (6) Placebo.
Conditions
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Study Design
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RANDOMIZED
CROSSOVER
OTHER
DOUBLE
Study Groups
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Healthy male older adults
Healthy male older adults
Total Amino Acids
Histidine, Isoleucine, Leucine, Lysine, Methionine, Phenylalanine, Threonine, Tryptophan, Valine, Alanine, Arginine, Aspartate, Cystine, Glutamine, Glutamate, Glycine, Proline, Serine, Tyrosine. All supplements are commercially available.
Essential Amino Acids
Histidine, Isoleucine, Leucine, Lysine, Methionine, Phenylalanine, Threonine, Tryptophan, Valine. All supplements are commercially available.
Essential Amino Acids + Hydroxy-methylbutyric acid (HMB)
Histidine, Isoleucine, Leucine, Lysine, Methionine, Phenylalanine, Threonine, Tryptophan, Valine, HMB. All supplements are commercially available.
Essential Amino Acids + Leucine
Histidine, Isoleucine, Leucine, Lysine, Methionine, Phenylalanine, Threonine, Tryptophan, Valine, Extra leucine. All supplements are commercially available.
Essential Amino Acids High
Histidine, Isoleucine, Leucine, Lysine, Methionine, Phenylalanine, Threonine, Tryptophan, Valine. All supplements are commercially available.
Placebo Water
Water
Healthy female older adults
Healthy female older adults
Total Amino Acids
Histidine, Isoleucine, Leucine, Lysine, Methionine, Phenylalanine, Threonine, Tryptophan, Valine, Alanine, Arginine, Aspartate, Cystine, Glutamine, Glutamate, Glycine, Proline, Serine, Tyrosine. All supplements are commercially available.
Essential Amino Acids
Histidine, Isoleucine, Leucine, Lysine, Methionine, Phenylalanine, Threonine, Tryptophan, Valine. All supplements are commercially available.
Essential Amino Acids + Hydroxy-methylbutyric acid (HMB)
Histidine, Isoleucine, Leucine, Lysine, Methionine, Phenylalanine, Threonine, Tryptophan, Valine, HMB. All supplements are commercially available.
Essential Amino Acids + Leucine
Histidine, Isoleucine, Leucine, Lysine, Methionine, Phenylalanine, Threonine, Tryptophan, Valine, Extra leucine. All supplements are commercially available.
Essential Amino Acids High
Histidine, Isoleucine, Leucine, Lysine, Methionine, Phenylalanine, Threonine, Tryptophan, Valine. All supplements are commercially available.
Placebo Water
Water
Interventions
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Total Amino Acids
Histidine, Isoleucine, Leucine, Lysine, Methionine, Phenylalanine, Threonine, Tryptophan, Valine, Alanine, Arginine, Aspartate, Cystine, Glutamine, Glutamate, Glycine, Proline, Serine, Tyrosine. All supplements are commercially available.
Essential Amino Acids
Histidine, Isoleucine, Leucine, Lysine, Methionine, Phenylalanine, Threonine, Tryptophan, Valine. All supplements are commercially available.
Essential Amino Acids + Hydroxy-methylbutyric acid (HMB)
Histidine, Isoleucine, Leucine, Lysine, Methionine, Phenylalanine, Threonine, Tryptophan, Valine, HMB. All supplements are commercially available.
Essential Amino Acids + Leucine
Histidine, Isoleucine, Leucine, Lysine, Methionine, Phenylalanine, Threonine, Tryptophan, Valine, Extra leucine. All supplements are commercially available.
Essential Amino Acids High
Histidine, Isoleucine, Leucine, Lysine, Methionine, Phenylalanine, Threonine, Tryptophan, Valine. All supplements are commercially available.
Placebo Water
Water
Eligibility Criteria
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Inclusion Criteria
* Stable body-weight (± 5%) for the past 3 months
* Subject is judged to be in satisfactory health based on medical history, physical examination, and laboratory screening evaluations.
* Ability to walk, sit down and stand up independently or with walking mobility aids
* Ability to lie in supine or elevated position for up to 7 hours
* Willingness and ability to comply with the protocol
Exclusion Criteria
* History of untreated metabolic diseases including hepatic or renal disorder
* Presence of acute illness or metabolically unstable chronic illness
* Presence of fever within the last 3 days
* Use of short course of oral corticosteroids within 4 weeks preceding study day
* (Possible) pregnancy
* Failure to give informed consent or Investigator's uncertainty about the willingness or ability of the subject to comply with the protocol requirements
* Already enrolled in another clinical trial and that clinical trial interferes with participating in this study
* Any other condition according to the PI or nurse that was found during the screening visit, that would interfere with the study or safety of the patient
60 Years
80 Years
ALL
Yes
Sponsors
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Texas A&M University
OTHER
Responsible Party
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Marielle PKJ Engelen, PhD
Professor
Locations
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Human Clinical Research Facility
College Station, Texas, United States
Countries
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Central Contacts
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Facility Contacts
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Other Identifiers
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83 - Pulse Feeding
Identifier Type: -
Identifier Source: org_study_id
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