Proteína e perda de peso em adolescentes (POWER)
Efeitos da composição variada de macronutrientes na perda de peso em adolescentes obesos
The aim of the proposed study is to provide important data on weight loss efficacy in overweight and obese adolescents on an isocaloric higher protein diet vs a lower protein diet utilizing the U.S. Department of Agriculture (USDA) MyPlate nutrition guide. The investigators hypothesize that the higher protein diet will result in greater weight loss due to increased satiety and better dietary adherence.
Visão geral do estudo
Status
Condições
Intervenção / Tratamento
Descrição detalhada
Aim 1 is to test the efficacy of a personalized higher protein weight loss intervention compared to a lower protein intervention which use the USDA MyPlate nutrition guide.
It is hypothesized that participants randomly assigned to the higher protein dietary treatment will lose more weight based on BMI-Z score over 12 weeks compared to participants in the lower dietary protein treatment.
Aim 2 is to test if changes in subjective ratings of appetite differ by dietary treatment (i.e. protein intake).
It is hypothesized that participants in the higher protein intervention will report a decrease in hunger and an increase in fullness compared to participants in the lower protein intervention.
Aim 3 is to test if change in the hexosamine biosynthetic pathway (HBP) measured at the rate limiting step of glutamine fructose-6-phosphate amidotransferase (GFAT) and glycosylation measured as O-linked N-acetylglucosamine (GlcNAc) transferase (OGT) differ by dietary treatment.
It is hypothesized that participants randomly assigned to the higher protein dietary treatment will have decreased change from baseline levels of GFAT and glycosylation (OGT) due to decreased carbohydrate intake compared to the lower protein treatment.
Exploratory Aims: As exploratory aims, the investigators will test if the higher protein or lower protein dietary treatments differentially alter glucose, insulin, cholesterol, and triglycerides (markers of the metabolic syndrome).
Tipo de estudo
Inscrição (Real)
Estágio
- Não aplicável
Contactos e Locais
Locais de estudo
-
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Louisiana
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Baton Rouge, Louisiana, Estados Unidos, 70808
- Pennington Biomedical Research Center
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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:
- Be male or female
- Be between the ages of 12 and 17, inclusive
- Be at or above the 85th BMI percentile (a number calculated from the participants height, weight, sex, and date of birth)
- Be willing to fast for 12 hours prior to clinic study visits 2 and 4
- Be willing to participate in the research study
Exclusion Criteria:
- Health Conditions:
- Has HIV or AIDS
- Has uncontrolled CVD or arrhythmia
- Has Type I or Type II diabetes.
- Is unable or unwilling to complete the study procedures
- Participant may not qualify for this study based on other exclusion criteria not listed. The study coordinator will go over this information in detail.
Medications:
- Diuretics
- Beta-blocker
- Weight loss medications, diet pills
- Anti-inflammatory drugs (corticosteroid/anabolic steroid/NSAID)
- Antipsychotic medications
- Other medications that may affect fluid balance or weight
Lifestyle:
• Plans to move out of the study area within the next 4 months, or plan to be out of the study area for more than 3 weeks during the course of the study.
Plano de estudo
Como o estudo é projetado?
Detalhes do projeto
- Finalidade Principal: Prevenção
- Alocação: Randomizado
- Modelo Intervencional: Atribuição Paralela
- Mascaramento: Nenhum (rótulo aberto)
Armas e Intervenções
Grupo de Participantes / Braço |
Intervenção / Tratamento |
|---|---|
|
Experimental: Higher protein and energy restriction
Participants in this arm will consume 30% of energy as protein with 25% energy restriction. |
Participants will receive an intervention specifically designed for adolescents and their group assignment that relies on nutrition education, nutritional counseling, social cognitive therapy, behavioral strategies, self-monitoring, portion size reduction, and increased physical activity. Participants will get an individualized dietary meal plan. Dietary counseling will be based on the MyPlate guidelines with extra attention and focus on appropriate protein food choice. Also in accordance to the MyPlate guidelines, all participants will be instructed to increase physical activity to 60 minutes a day as aerobic physical activity. The higher protein group will be instructed to consume 30% of energy as protein, with 25% and 45% of energy from fat and carbohydrate, respectively. |
|
Experimental: Lower protein and energy restriction
Participants in this arm will consume 15% of energy as protein with 25% energy restriction. |
Participants will receive an intervention specifically designed for adolescents and their group assignment that relies on nutrition education, nutritional counseling, social cognitive therapy, behavioral strategies, self-monitoring, portion size reduction, and increased physical activity. Participants will get an individualized dietary meal plan. Dietary counseling will be based on the MyPlate guidelines with extra attention and focus on appropriate protein food choice. Also in accordance to the MyPlate guidelines, all participants will be instructed to increase physical activity to 60 minutes a day as aerobic physical activity. The lower protein group will be instructed to consume 15% of energy as protein, with 25% and 60% of energy from fat and carbohydrate, respectively. |
O que o estudo está medindo?
Medidas de resultados primários
Medida de resultado |
Prazo |
|---|---|
|
Pontuação Z do IMC
Prazo: até a semana 12
|
até a semana 12
|
Medidas de resultados secundários
Medida de resultado |
Descrição da medida |
Prazo |
|---|---|---|
|
Classificações subjetivas de apetite
Prazo: Linha de base e Semana 12
|
Linha de base e Semana 12
|
|
|
Hexosamine Biosynthetic Pathway
Prazo: Baseline and Week 12
|
glutamine fructose-6-phosphate amidotransferase (GFAT) and glycosylation measured as O-linked N-acetylglucosamine (GlcNAc) transferase (OGT) measurement |
Baseline and Week 12
|
Outras medidas de resultado
Medida de resultado |
Prazo |
|---|---|
|
Glicose
Prazo: Linha de base e Semana 12
|
Linha de base e Semana 12
|
|
Insulina
Prazo: Linha de base e Semana 12
|
Linha de base e Semana 12
|
|
Colesterol
Prazo: Linha de base e Semana 12
|
Linha de base e Semana 12
|
|
Triglicerídeos
Prazo: Linha de base e Semana 12
|
Linha de base e Semana 12
|
|
Pressão arterial
Prazo: Linha de base e Semana 12
|
Linha de base e Semana 12
|
Colaboradores e Investigadores
Patrocinador
Investigadores
- Investigador principal: John W Apolzan, PhD, Pennington Biomedical
Datas de registro do estudo
Datas Principais do Estudo
Início do estudo
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 (Estimado)
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
Termos MeSH relevantes adicionais
Outros números de identificação do estudo
- PBRC 2014-014
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