Effects of Short-term Energy Deficit on Muscle Protein Turnover
Studienübersicht
Status
Status
Bedingungen
Bedingungen
Intervention / Behandlung
Intervention / Behandlung
Detaillierte Beschreibung
Studientyp
Studientyp
Einschreibung (Tatsächlich)
Einschreibung
Phase
Phase
- Unzutreffend
Kontakte und Standorte
Studienorte
-
-
Ontario
-
Hamilton, Ontario, Kanada, L8S 4K1
- Exercise Metabolism Research Laboratory, McMaster Univeristy
-
-
Teilnahmekriterien
Zulassungskriterien
Zulassungskriterien
Studienberechtigtes Alter
Akzeptiert gesunde Freiwillige
Studienberechtigte Geschlechter
Beschreibung
Inclusion Criteria:
- Between the ages of 20 and 30 years inclusive
- Have a BMI between 25 and 33 inclusive
Exclusion Criteria:
- Have a body mass index less than 25 kg/m2 or greater than 33 kg/m2.
- Vegan
- History of allergy, sensitivity, or strong dislike towards dairy protein
- Smoker or user of tobacco products
- High physical activity
- Have health problems such as: renal or gastrointestinal disorders, metabolic disease, heart disease, vascular disease, rheumatoid arthritis, diabetes, poor lung function, uncontrolled blood pressure, dizziness, thyroid problems, or any other health conditions for which volunteers are being treated that might put them at risk for this study.
- Taking anti-diabetic, anti-inflammatory, platelet inhibitor, or anti-coagulant medications
- Use of an investigational drug product within the last 30 days
- Have participated in an infusion protocol in the last year
- Do not understand English or have a condition the PI believes would interfere with the ability to provide informed consent, comply with the study protocol, or which might confound the interpretation of the study results or put volunteers at undue risk
Studienplan
Wie ist die Studie aufgebaut?
Designdetails
- Hauptzweck: Grundlegende Wissenschaft
- Zuteilung: Zufällig
- Interventionsmodell: Parallele Zuordnung
- Maskierung: Single
Anzahl der Arme
Waffen und Interventionen
Teilnehmergruppe / ArmTeilnehmergruppe / Arm |
Intervention / BehandlungIntervention / Behandlung |
|---|---|
|
Experimental: High Protein
2.4g protein/kg/d.
The macronutrient composition will be 50:15:35 (carbohydrates:fat:protein) during Energy Restriction
|
All meals will be provided for the duration of the energy restriction intervention and the energy deficit will be calculated based on estimated energy requirements by indirect calorimetry to provide 60% of energy requirements.
In addition, one leg will be assigned to perform resistance exercise for 5 days during the 10 day energy deficit.
|
|
Experimental: Adequate Protein
1.2g protein/kg/d.
The macronutrient composition will be 50:35:15 (carbohydrates:fat:protein) during Energy Restriction
|
All meals will be provided for the duration of the energy restriction intervention and the energy deficit will be calculated based on estimated energy requirements by indirect calorimetry to provide 60% of energy requirements.
In addition, one leg will be assigned to perform resistance exercise for 5 days during the 10 day energy deficit.
|
Was misst die Studie?
Primäre Ergebnismessungen
Primäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
|---|---|---|
|
Muscle protein turnover
Zeitfenster: Baseline and 10 days
|
Change in muscle protein synthesis and muscle protein breakdown before and after the weight loss diet will be assessed.
The relationship between high protein diets (parallel groups) and exercise (unilateral resistance exercise) on muscle protein turnover will also be examined.
Muscle protein synthesis and muscle protein breakdown will be measured with stable isotope infusions of labelled phenylalanine tracers before and after the 10 day diet.
In addition, long term muscle protein synthesis will be measured with orally ingested deuterated water.
|
Baseline and 10 days
|
Sekundäre Ergebnismessungen
Sekundäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
|---|---|---|
|
Molecular markers
Zeitfenster: Baseline and 10 days
|
Change in the the transcriptional expression of genes involved in the ubiquitin-proteasome pathway (main regulator of muscle protein breakdown) measured in muscle samples obtained at baseline and following the 10 day dietary intervention by quantitative polymerase chain reaction (qPCR).
These same samples will be analyzed by western blot for the expression of active and inactive isoforms of caspase-3, an important component of muscle protein breakdown.
Finally, immunoprecipitation and western blot will be used to examine the ubiquitination of translation initiation factors at baseline and following the 10 day intervention
|
Baseline and 10 days
|
Mitarbeiter und Ermittler
Sponsor
Sponsor
Publikationen und hilfreiche Links
Allgemeine Veröffentlichungen
- Areta JL, Burke LM, Camera DM, West DW, Crawshay S, Moore DR, Stellingwerff T, Phillips SM, Hawley JA, Coffey VG. Reduced resting skeletal muscle protein synthesis is rescued by resistance exercise and protein ingestion following short-term energy deficit. Am J Physiol Endocrinol Metab. 2014 Apr 15;306(8):E989-97. doi: 10.1152/ajpendo.00590.2013. Epub 2014 Mar 4.
- Pasiakos SM, Cao JJ, Margolis LM, Sauter ER, Whigham LD, McClung JP, Rood JC, Carbone JW, Combs GF Jr, Young AJ. Effects of high-protein diets on fat-free mass and muscle protein synthesis following weight loss: a randomized controlled trial. FASEB J. 2013 Sep;27(9):3837-47. doi: 10.1096/fj.13-230227. Epub 2013 Jun 5.
- Pasiakos SM, Vislocky LM, Carbone JW, Altieri N, Konopelski K, Freake HC, Anderson JM, Ferrando AA, Wolfe RR, Rodriguez NR. Acute energy deprivation affects skeletal muscle protein synthesis and associated intracellular signaling proteins in physically active adults. J Nutr. 2010 Apr;140(4):745-51. doi: 10.3945/jn.109.118372. Epub 2010 Feb 17.
- Hector AJ, Marcotte GR, Churchward-Venne TA, Murphy CH, Breen L, von Allmen M, Baker SK, Phillips SM. Whey protein supplementation preserves postprandial myofibrillar protein synthesis during short-term energy restriction in overweight and obese adults. J Nutr. 2015 Feb;145(2):246-52. doi: 10.3945/jn.114.200832. Epub 2014 Dec 17. Erratum In: J Nutr. 2015 Jun;145(6):1373.
Studienaufzeichnungsdaten
Haupttermine studieren
Studienbeginn
Studienbeginn
Primärer Abschluss (Tatsächlich)
Primärer Abschluss
Studienabschluss (Tatsächlich)
Studienabschluss
Studienanmeldedaten
Zuerst eingereicht
Zuerst eingereicht
Zuerst eingereicht, das die QC-Kriterien erfüllt hat
Zuerst eingereicht, das die QC-Kriterien erfüllt hat
Zuerst gepostet (Schätzen)
Zuerst gepostet
Studienaufzeichnungsaktualisierungen
Letztes Update gepostet (Schätzen)
Letztes Update gepostet
Letztes eingereichtes Update, das die QC-Kriterien erfüllt
Letztes eingereichtes Update, das die QC-Kriterien erfüllt
Zuletzt verifiziert
Zuletzt verifiziert
Mehr Informationen
Begriffe im Zusammenhang mit dieser Studie
Schlüsselwörter
Andere Studien-ID-Nummern
Andere Studien-ID-Nummern
- Not assigned (Charles A. Dana Foundation Brain and Immuno-Imaging Grant)
Diese Informationen wurden ohne Änderungen direkt von der Website clinicaltrials.gov abgerufen. Wenn Sie Ihre Studiendaten ändern, entfernen oder aktualisieren möchten, wenden Sie sich bitte an register@clinicaltrials.gov. Sobald eine Änderung auf clinicaltrials.gov implementiert wird, wird diese automatisch auch auf unserer Website aktualisiert .