- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT02620111
Protein Balance in Protein Supplemented Elderly Patients: Acute Study With Protein-tracer-techniques
Effect of Protein High in Leucine on Muscle Protein Balance in Elderly Patients: Acute Study With Protein-tracer-techniques
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
Background: Improved muscle function/strength will enhance the quality of life of the more frail elderly population. Dietary proteins and amino acids act as anabolic substrates in muscles in elderly people. In particular the amino acid leucine is suggested to have an impact on muscle protein synthesis. In collaboration with the Danish dairy company Arla Foods we will use their conventional Whey protein and leucine enriched Whey protein in an acute study on elderly patients.
Our aim is to examine the acute effects of supplementation with whey protein high in leucine compared to whey protein with normal leucine content on muscle protein synthesis and protein balance in elderly patients.
Methods: We include 10 elderly patients, age 60-85 years in a randomized crossover study. The subjects will be recruited from the Osteoporosis Section at the Department of Endocrinology at Aarhus University Hospital. The subjects are their own controls in 2 x 1 day interventions A: whey protein high in leucine and B: whey protein with normal leucine content. Interventions are conducted with a 4 week washout period between them. On the intervention day postprandial protein synthesis rate will be measured over 2 X 3h using a tracer infusing protocol with 15Nphenylalanine along with blood samples and muscle biopsies. For analyzing steps of signaling in muscle protein synthesis initiated by leucine mammalian target of rapamycin (mTor) and sites downstream from mTor is quantified using western blotting. Whole body protein kinetics are calculated using the formula Q=i*Ei/Ep-i
Study Type
Phase
- Not Applicable
Contacts and Locations
Study Locations
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Aarhus C, Denmark, 8000
- Department of Endocrinology, Aarhus University Hospital
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion criteria:
- Healthy elder people
Exclusion criteria:
- Liver and kidney disease.
- Known diabetes or Hgb1c ≥6,5% (≥48mmol/l).
- Severe heart disease (NYHA-Class >2).
- Oral corticosteroid treatment within the last 3 month.
- participation in other intervention studies within the last 4 weeks.
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Treatment
- Allocation: Randomized
- Interventional Model: Crossover Assignment
- Masking: Single
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
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Experimental: Whey protein high leucine
Subjects are supplemented water in a fasted state for 180 minutes while the isotopic tracer 15Nphenylalanin is infused.
Subjects are supplemented with whey protein high in leucine from 180 - 360 minutes while the isotopic tracer 15Nphenylalanin is infused.
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This Group is analysed for muscle protein synthesis and breakdown, mTor pathway signaling and Amino acid metabolism while supplemented first water then whey protein high in leucin
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Active Comparator: Whey protein normal leucine
Subjects are supplemented water in a fasted state for 180 minutes while the isotopic tracer 15Nphenylalanin is infused.
Subjects are supplemented with whey protein normal in leucine from 180 - 360 minutes while the isotopic tracer 15Nphenylalanin is infused.
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This Group is analysed for muscle protein synthesis and breakdown, mTor pathway signaling and Amino acid metabolism while supplemented first water then whey protein normal in leucin.
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Time Frame |
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Protein balance
Time Frame: Protein balance is measured in a triplet from 160-180 minutes into the protein supplementation
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Protein balance is measured in a triplet from 160-180 minutes into the protein supplementation
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Collaborators and Investigators
Sponsor
Investigators
- Principal Investigator: Jesper L Mehlsen, Phd student, University of Aarhus
Study record dates
Study Major Dates
Study Start
Primary Completion (Anticipated)
Study Completion (Anticipated)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Estimate)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Other Study ID Numbers
- 44853
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
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