Healthy Clinical Trial
Official title:
Supplementation of a Leucine-Enriched Dairy Protein Blend: Effects on Plasma Amino Acids in Older Adults
Verified date | February 2020 |
Source | McMaster University |
Contact | n/a |
Is FDA regulated | No |
Health authority | |
Study type | Observational |
It is well known that dietary protein is a powerful transient stimulator of the muscle protein synthetic rate (MPS) whereby changes in MPS in response to feeding may be regulated by specific downstream target proteins of mammalian target of rapamycin signaling, such as S6K1, rpS6, and eIF2B. A meal deficient in protein, however, does not increase the rate of MPS because a rise in the bioavailability of amino acids does not occur. In addition, the source of dietary proteins has been shown to impact postprandial blood levels of amino acids. The concept that certain types of proteins are "fast acting" or "slow acting" has been shown to affect the postprandial profile of amino acids appearing in the systemic circulation. Native whey and micellar casein are both dairy proteins that contain a similar amount of essential (EAA), but blood EAA levels increase faster and to a higher level after the consumption of whey protein. Differences in gastric emptying, digestion and absorption kinetics between micellar casein and native whey are the underlying factors. Nonetheless, micellar casein protein has been shown to protract MPS in humans. Despite the significant amount of information gained with respect to both of these protein sources, the effects of combinatorial formulations on the postprandial profile of amino acids appearing in the blood is less well known. The purpose of the present study is to determine post-ingestion aminoacidemia, glycemia, and insulinemia from a specially formulated dairy protein blend.
Status | Active, not recruiting |
Enrollment | 8 |
Est. completion date | June 1, 2020 |
Est. primary completion date | December 1, 2019 |
Accepts healthy volunteers | |
Gender | All |
Age group | 65 Years and older |
Eligibility |
Inclusion Criteria: - 8 participants will be included in this study. Each participant will consume the supplement only once in a randomized fashion during one of three separate visits and there will be approximately 1 week between each visit. In order to participate in this study, each participant must be male or female, 65 years or older (inclusive) and cannot be a smoker or user of tobacco products. Exclusion Criteria: - The exclusion requirements for this study include the following conditions: - Take any analgesic or anti-inflammatory drugs(s), prescription or non-prescription, chronically will be excluded. However, a washout period of 4 weeks will be suitable for participation. - A history of neuromuscular problems or muscle and/or bone wasting diseases - Any acute or chronic illness, cardiac, pulmonary, liver, or kidney abnormalities, uncontrolled hypertension, insulin- or non-insulin dependent diabetes or other metabolic disorders-all ascertained through medical history screening questionnaires - Use medications known to affect protein metabolism (i.e. corticosteroids, non-steroidal anti-inflammatories, or prescription strength acne medications) |
Country | Name | City | State |
---|---|---|---|
Canada | Exercise Metabolism Research Laboratory, McMaster Univeristy | Hamilton | Ontario |
Lead Sponsor | Collaborator |
---|---|
McMaster University |
Canada,
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* Note: There are 14 references in all — Click here to view all references
Type | Measure | Description | Time frame | Safety issue |
---|---|---|---|---|
Primary | Easy-fast amino acid sample testing kit for gas chromatography mass spectrometry | plasma amino acid concentrations | 375 minutes | |
Secondary | Hexokinase/G-6-PDH methodology | plasma glucose concentrations | 375 minutes | |
Secondary | Chemiluminescent Microparticle Immunoassay | plasma insulin concentrations | 375 minutes | |
Secondary | Visual Analog Scale Questionnaires for food sensory perception desire to eat | Units on a 100mm Paper Scale, 0mm = lowest score and 100mm = highest score | Average score across 13 measurements | |
Secondary | Visual Analog Scale Questionnaires for food sensory perception for hunger | Units on a 100mm Paper Scale, 0mm = lowest score and 100mm = highest score | Average score across 13 measurements | |
Secondary | Visual Analog Scale Questionnaires for food sensory perception for fullness | Units on a 100mm Paper Scale, 0mm = lowest score and 100mm = highest score | Average score across 13 measurements | |
Secondary | Visual Analog Scale Questionnaires for food sensory perception for thirst | Units on a 100mm Paper Scale, 0mm = lowest score and 100mm = highest score | Average score across 13 measurements | |
Secondary | Visual Analog Scale Questionnaires for food sensory perception for how much food could be eaten | Units on a 100mm Paper Scale, 0mm = lowest score and 100mm = highest score | Average score across 13 measurements | |
Secondary | Visual Analog Scale Questionnaires for food sensory perception for liking or disliking of food | Units on a 100mm Paper Scale, 0mm = worst score and 100mm = best score | Average score across 13 measurements | |
Secondary | Visual Analog Scale Questionnaires for food sensory perception for visual appeal | Units on a 100mm Paper Scale, 0mm = worst score and 100mm = best score | Average score across 2 measurements | |
Secondary | Visual Analog Scale Questionnaires for food sensory perception for smell | Units on a 100mm Paper Scale, 0mm = worst score and 100mm = best score | Average score across 2 measurements | |
Secondary | Visual Analog Scale Questionnaires for food sensory perception for taste | Units on a 100mm Paper Scale, 0mm = worst score and 100mm = best score | Average score across 2 measurements | |
Secondary | Visual Analog Scale Questionnaires for food sensory perception for aftertaste | Units on a 100mm Paper Scale, 0mm = worst score and 100mm = best score | Average score across 2 measurements | |
Secondary | Visual Analog Scale Questionnaires for food sensory perception for pleasantness | Units on a 100mm Paper Scale, 0mm = worst score and 100mm = best score | Average score across 2 measurements | |
Secondary | Height in meters | Stadiometer | One measurement at baseline | |
Secondary | Weight in kilograms | Physician scale | One measurement at baseline |
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