- ICH GCP
- Registro degli studi clinici negli Stati Uniti
- Sperimentazione clinica NCT02145780
Polyphenols and Overfeeding (Poly-Nut)
Polyphenols: Protection From Overfeeding-induced Insulin Resistance?
Obesity is a complex and multifactorial disease representing a major public health challenge. Indeed, overweight and obese people carry a major risk of developing insulin resistance and type 2 diabetes mellitus. It has been demonstrated that polyphenols could be used to counteract some of the mechanisms involved in the generation of insulin resistance. The model of overfeeding represents a very good study model of the metabolic complications of obesity, since it has been shown to induce a transient state of insulin resistance in the human.
The purpose of this research is to study the effects of a overfeeding (+50% of daily caloric needs over 31 days) with or without polyphenols supplementation (2g/days over 31 days) on insulin sensitivity measured in the setting of a hyperinsulinemic euglycemic clamp and on post prandial partitioning of exogenous lipids after a test meal.
During 31 days, the volunteers will consume chocolate bars, chips, chocolate breads and cola in addition to their usual diet and will be supplemented with 2g of grape polyphenols extract or with placebo.
Panoramica dello studio
Stato
Condizioni
Tipo di studio
Iscrizione (Effettivo)
Fase
- Non applicabile
Contatti e Sedi
Luoghi di studio
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Pierre-bénite, Francia, 69495
- Rhône Alpes Human Nutrition Center (CRNH Rhône-Alpes)
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Criteri di partecipazione
Criteri di ammissibilità
Età idonea allo studio
Accetta volontari sani
Sessi ammissibili allo studio
Descrizione
Inclusion Criteria:
- Male
- Aged from 18 to 55 years
- Body Mass Index of 23 to 27 kg/m²
- Normal blood pressure
- Fasting glycemia < 7 mmol/L
- CRPus < 10mg/L
- Triglycerides ≤ 3mmol/L
Exclusion Criteria:
- Medical or surgical history which may affect the results (renal -cardiovascular - hepatic- endocrine-inflammatory diseases)
- Subjects under treatment which may interfere with the measured parameters
- Eating disorder
- Intensive sportive activity
- Dairy products allergy or intolerance
Piano di studio
Come è strutturato lo studio?
Dettagli di progettazione
- Scopo principale: Scienza basilare
- Assegnazione: Randomizzato
- Modello interventistico: Assegnazione parallela
- Mascheramento: Quadruplicare
Armi e interventi
Gruppo di partecipanti / Arm |
Intervento / Trattamento |
|---|---|
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Sperimentale: 2g of grape polyphenol extract supplement
Men will have to consume daily 2g of grape polyphenol extract during the 31 days of overfeeding.
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Men will have to consume daily 2g of grape polyphenol extract during the 31 days of overfeeding.
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Comparatore placebo: 2g of placebo (lactose)
Men will have to consume daily 2g of placebo during the 31 days of overfeeding.
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Men will have to consume daily 2g of placebo during the 31 days of overfeeding.
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Cosa sta misurando lo studio?
Misure di risultato primarie
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
|---|---|---|
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Peripheral insulin sensitivity
Lasso di tempo: During 31 days
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Volunteers will have peripheral and hepatic insulin sensitivity determined by using a two-stage hyperinsulinemic euglycemic clamp with stable isotopically labeled tracer infusion.
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During 31 days
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Misure di risultato secondarie
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
|---|---|---|
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Hepatic insulin sensitivity
Lasso di tempo: before and after the 31 days of overfeeding
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Endogenous glucose production (EGP) will be determined during the last 30 minutes of the low-dose insulin infusion.
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before and after the 31 days of overfeeding
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Change in genes expression in adipose and muscle tissues
Lasso di tempo: Before and after the 31 days of overfeeding
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RT-PCR
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Before and after the 31 days of overfeeding
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Anthropometry, Fat quantification and Abdominal fat distribution
Lasso di tempo: During 31 days
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Weight, height, waist and hip circumferences, fat mass using dual x-ray absorptiometry (DEXA) and abdominal fat distribution using resonance magnetic imaging (RMI).
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During 31 days
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Fasting and Postprandial partitioning of exogenous lipid
Lasso di tempo: Fasting and during all the postprandial period (0-300 minutes)
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13C enrichment will be measured in blood samples and breath test during a test meal performed before and after the 31 days of overfeeding.
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Fasting and during all the postprandial period (0-300 minutes)
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Modification in intestinal microbiota
Lasso di tempo: Before and after the 31 days of overfeeding
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Feces analyses
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Before and after the 31 days of overfeeding
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Energy expenditure and substrate oxidation with indirect calorimetry
Lasso di tempo: Fasting and during all the postprandial period (0-300 minutes)
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Energy metabolism will be measured before and after the 31 days of overfeeding.
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Fasting and during all the postprandial period (0-300 minutes)
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Collaboratori e investigatori
Sponsor
Investigatori
- Investigatore principale: Martine LAVILLE, MD, PhD, Rhône Alpes Human Nutrition Center (CRNH Rhône-Alpes)
Pubblicazioni e link utili
Pubblicazioni generali
- Bartova S, Madrid-Gambin F, Fernandez L, Carayol J, Meugnier E, Segrestin B, Delage P, Vionnet N, Boizot A, Laville M, Vidal H, Marco S, Hager J, Moco S. Grape polyphenols decrease circulating branched chain amino acids in overfed adults. Front Nutr. 2022 Oct 26;9:998044. doi: 10.3389/fnut.2022.998044. eCollection 2022.
- Segrestin B, Delage P, Nemeth A, Seyssel K, Disse E, Nazare JA, Lambert-Porcheron S, Meiller L, Sauvinet V, Chanon S, Simon C, Ratiney H, Beuf O, Pralong F, Yassin NA, Boizot A, Gachet M, Burton-Pimentel KJ, Vidal H, Meugnier E, Vionnet N, Laville M. Polyphenol Supplementation Did Not Affect Insulin Sensitivity and Fat Deposition During One-Month Overfeeding in Randomized Placebo-Controlled Trials in Men and in Women. Front Nutr. 2022 May 9;9:854255. doi: 10.3389/fnut.2022.854255. eCollection 2022.
Studiare le date dei record
Studia le date principali
Inizio studio (Effettivo)
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 (Effettivo)
Ultimo aggiornamento inviato che soddisfa i criteri QC
Ultimo verificato
Maggiori informazioni
Termini relativi a questo studio
Parole chiave
Termini MeSH pertinenti aggiuntivi
Altri numeri di identificazione dello studio
- 2013-807
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 .
Prove cliniche su 2g of grape polyphenol extract
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Oregon Health and Science UniversityCompletato