Local Effects of Amino Acids and 3-hydroxybutyrate in the Bilaterally Perfused Human Leg
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|ClinicalTrials.gov Identifier: NCT01461603|
Recruitment Status : Unknown
Verified January 2016 by University of Aarhus.
Recruitment status was: Active, not recruiting
First Posted : October 28, 2011
Last Update Posted : March 3, 2016
Introduction: Protein loss during critical illness is an important problem and is shown to predict overall survival. In animal studies, infusion of leucine is shown to increase the synthesis of muscle protein by 30-40% and decrease protein degradation by 30%.
Objectives: Compared to saline, an amino acid or 3hydroxybutyrate infusion in the femoral artery will promote protein synthesis and inhibit breakdown assessed with local a/v phenylalanine and tyrosine tracer kinetics in healthy volunteers. These effects will include distinct alterations in muscle signal events, in particular mTOR.
Methods: n = 10 healthy male subjects are equipped with catheters in aa. femorals and vv. femorals bilaterally under local anaesthetics. Each study comprises a 3-hour basal period and a 3-hour period with hyperinsulinaemic-euglycaemic clamp. During the test, samples of arterial and venous blood and 4 muscle biopsies are obtained. The intervention contain continues saline infusion compared to either amino acids (Vamin) or 3hydroxybutyrate solution FFa-3OHB.
Perspectives: This study elucidates the direct effect of aminoacids and ketone bodies on muscle protein metabolism in humans and contribute to further development of nutritional therapy in human catabolic states.
|Condition or disease||Intervention/treatment||Phase|
|Critical Illness Protein Metabolism Pharmaconutrients||Dietary Supplement: Vamin (Fresenius Kabi) Dietary Supplement: 3hydroxybutyrate||Not Applicable|
|Study Type :||Interventional (Clinical Trial)|
|Actual Enrollment :||10 participants|
|Intervention Model:||Parallel Assignment|
|Masking:||Double (Participant, Care Provider)|
|Official Title:||Local Effects of Amino Acids and 3-hydroxybutyrate in the Bilaterally Perfused Human Leg|
|Study Start Date :||September 2011|
|Actual Primary Completion Date :||February 2013|
|Estimated Study Completion Date :||July 2016|
Active Comparator: Amino acids
Amino acids compared to saline
Dietary Supplement: Vamin (Fresenius Kabi)
Vamin 18gN 1ml/min infusion in 6 hours
Active Comparator: 3hydroxybutyrat (3OHB)
Ketone body, 3OHB compared to saline
Dietary Supplement: 3hydroxybutyrate
Goldbio, FFA-3OHB, dry powder mixed with sterile water at Aarhus University hospital pharmacy.
Other Name: 3OHB, 3hydroxybutyric acid
- Changes in muscle metabolism after administration of amino acids. [ Time Frame: Basal period and a glucose clamp (6 hours pr.day) ]Measured by arterio-venous differences of isotope tracers
- Intracellular mTOR and pAkt signal activation after infusion of amino acids. [ Time Frame: Basal period and a glucose clamp (6 hours pr. day) ]4 muscle biopsies measured for mTOR and pAkt activation by western blotting
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT01461603
|M-researchlab. MEA, Aarhus University Hospital, NBG|
|Aarhus C, Denmark, 8000|
|Principal Investigator:||Niels Møller, Professor, Dr.Med.||University of Aarhus|