- ICH GCP
- US Clinical Trials Registry
- Klinisk forsøg NCT00170144
Effect of Branched Chain Amino Acids on Muscle
Branched Chain Amino Acids as Stimulant of Muscle Mitochondrial Function in Elderly People
Studieoversigt
Detaljeret beskrivelse
Skeletal muscle mito ATP production in young people are stimulated by insulin when infused with a mixture of amino acids while clamping blood glucose at the basal level. Our preliminary results indicate that this effect on mito ATP production is directly related to amino acid levels. Recent publications indicated that infusion of insulin with amino acids specifically stimulate muscle mitochondrial protein synthesis with no effect on synthesis or contractile proteins or sarcoplasmic proteins. The recent publications also indicated that intracellular amino acid anabolic sensors are stimulated by amino acids. It appears that BCAA, especially leucine has a specific effect in stimulating intracellular signaling or translation of mRNA to protein synthesis. It has been shown that amino acids, especially leucine, stimulate protein synthesis by activation of the mTOR pathway in mTOR phosphorylates p70S6 kinase which in turn phosphorylates the ribosomal S6 protein, resulting in increased activity of the protein synthesis complex. Activated mTOR also phosphorylates eIF4E-BP1 and activates the protein synthesis initiation complex. It is the abundance of specific mRNAase that determines synthesis of which specific proteins are promoted. Our preliminary data supports that amino acids selectively promotes muscle mitochondrial protein synthesis by enhancing the abundance of transcripts of genes that encode mitochondrial proteins. Administration of an amino acid mixture, specifically BCAA, is proposed as a stimulant of muscle mitochondrial ATP production. Secondary measurements will be performed to understand the underlying mechanism of enhanced muscle ATP production. These results are likely to contribute to our understanding of the basic mechanisms of the regulation of mitochondrial biogenesis in humans which will have potential future application.
This is a cross-sectional study between young and old. The study will use the new proteomic techniques established in our laboratory to profile and quantify mitochondrial protein synthesis in the participants. The combination of metabolic labeling with stable isotope and measuring synthesis rates of specific mito proteins by tandem mass spectrometry will determine whether actual stimulation by BCAA occurs differentially in young and elderly.
Undersøgelsestype
Tilmelding (Forventet)
Fase
- Ikke anvendelig
Kontakter og lokationer
Studiesteder
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Minnesota
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Rochester, Minnesota, Forenede Stater, 55905
- Mayo Clinic
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Deltagelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
Tager imod sunde frivillige
Køn, der er berettiget til at studere
Beskrivelse
Studieplan
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
- Primært formål: Behandling
- Tildeling: Ikke-randomiseret
- Interventionel model: Crossover opgave
- Maskning: Ingen (Åben etiket)
Hvad måler undersøgelsen?
Primære resultatmål
Resultatmål |
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Does branched chain amino acids stimulate muscle mitochondrial ATP production in young and elderly?
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Sekundære resultatmål
Resultatmål |
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Does branched chain amino acids increase abundance of mRNA of genes encoding mitochondrial proteins and transcription factors equally in young and old?
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Does branched chain amino acids increase levels of phosphorylated signaling proteins through the mTOR pathways equally in the young and old?
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Does branched chain amino acids increase fractional synthesis rates of specific mitochondrial proteins, mitochondrial protein concentrations and mitochondrial enzyme activities equally in the young and old?
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Samarbejdspartnere og efterforskere
Sponsor
Efterforskere
- Ledende efterforsker: K. Sreekumaran Nair, M.D., Mayo Clinic
Datoer for undersøgelser
Studer store datoer
Studiestart
Primær færdiggørelse (Faktiske)
Studieafslutning (Faktiske)
Datoer for studieregistrering
Først indsendt
Først indsendt, der opfyldte QC-kriterier
Først opslået (Skøn)
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Skøn)
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidst verificeret
Mere information
Begreber relateret til denne undersøgelse
Andre undersøgelses-id-numre
- 05-004000
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