- ICH GCP
- Registro degli studi clinici negli Stati Uniti
- Sperimentazione clinica NCT00170144
Effect of Branched Chain Amino Acids on Muscle
Branched Chain Amino Acids as Stimulant of Muscle Mitochondrial Function in Elderly People
Panoramica dello studio
Descrizione dettagliata
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.
Tipo di studio
Iscrizione (Anticipato)
Fase
- Non applicabile
Contatti e Sedi
Luoghi di studio
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Minnesota
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Rochester, Minnesota, Stati Uniti, 55905
- Mayo Clinic
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Criteri di partecipazione
Criteri di ammissibilità
Età idonea allo studio
Accetta volontari sani
Sessi ammissibili allo studio
Descrizione
Piano di studio
Come è strutturato lo studio?
Dettagli di progettazione
- Scopo principale: Trattamento
- Assegnazione: Non randomizzato
- Modello interventistico: Assegnazione incrociata
- Mascheramento: Nessuno (etichetta aperta)
Cosa sta misurando lo studio?
Misure di risultato primarie
Misura del risultato |
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Does branched chain amino acids stimulate muscle mitochondrial ATP production in young and elderly?
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Misure di risultato secondarie
Misura del risultato |
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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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Collaboratori e investigatori
Sponsor
Investigatori
- Investigatore principale: K. Sreekumaran Nair, M.D., Mayo Clinic
Studiare le date dei record
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Inizio studio
Completamento primario (Effettivo)
Completamento dello studio (Effettivo)
Date di iscrizione allo studio
Primo inviato
Primo inviato che soddisfa i criteri di controllo qualità
Primo Inserito (Stima)
Aggiornamenti dei record di studio
Ultimo aggiornamento pubblicato (Stima)
Ultimo aggiornamento inviato che soddisfa i criteri QC
Ultimo verificato
Maggiori informazioni
Termini relativi a questo studio
Altri numeri di identificazione dello studio
- 05-004000
Queste informazioni sono state recuperate direttamente dal sito web clinicaltrials.gov senza alcuna modifica. In caso di richieste di modifica, rimozione o aggiornamento dei dettagli dello studio, contattare register@clinicaltrials.gov. Non appena verrà implementata una modifica su clinicaltrials.gov, questa verrà aggiornata automaticamente anche sul nostro sito web .
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