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- Ensaio Clínico 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.
Visão geral do estudo
Status
Condições
Tipo de estudo
Inscrição (Real)
Estágio
- Não aplicável
Contactos e Locais
Locais de estudo
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Pierre-bénite, França, 69495
- Rhône Alpes Human Nutrition Center (CRNH Rhône-Alpes)
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Critérios de participação
Critérios de elegibilidade
Idades elegíveis para estudo
Aceita Voluntários Saudáveis
Gêneros Elegíveis para o Estudo
Descrição
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
Plano de estudo
Como o estudo é projetado?
Detalhes do projeto
- Finalidade Principal: Ciência básica
- Alocação: Randomizado
- Modelo Intervencional: Atribuição Paralela
- Mascaramento: Quadruplicar
Armas e Intervenções
Grupo de Participantes / Braço |
Intervenção / Tratamento |
|---|---|
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Experimental: 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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Comparador de 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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O que o estudo está medindo?
Medidas de resultados primários
Medida de resultado |
Descrição da medida |
Prazo |
|---|---|---|
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Peripheral insulin sensitivity
Prazo: 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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Medidas de resultados secundários
Medida de resultado |
Descrição da medida |
Prazo |
|---|---|---|
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Hepatic insulin sensitivity
Prazo: 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
Prazo: 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
Prazo: 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
Prazo: 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
Prazo: 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
Prazo: 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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Colaboradores e Investigadores
Patrocinador
Investigadores
- Investigador principal: Martine LAVILLE, MD, PhD, Rhône Alpes Human Nutrition Center (CRNH Rhône-Alpes)
Publicações e links úteis
Publicações Gerais
- 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.
Datas de registro do estudo
Datas Principais do Estudo
Início do estudo (Real)
Conclusão Primária (Real)
Conclusão do estudo (Real)
Datas de inscrição no estudo
Enviado pela primeira vez
Enviado pela primeira vez que atendeu aos critérios de CQ
Primeira postagem (Estimativa)
Atualizações de registro de estudo
Última Atualização Postada (Real)
Última atualização enviada que atendeu aos critérios de controle de qualidade
Última verificação
Mais Informações
Termos relacionados a este estudo
Palavras-chave
Termos MeSH relevantes adicionais
Outros números de identificação do estudo
- 2013-807
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