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Gene-Environment Interaction and Precision Nutrition on Adiposity, Glycemic, Lipids Changes, and Bone Health

26 agosto 2019 aggiornato da: Lu Qi, Tulane University

Obesity Genes, Energy Regulation in Response to Weight-Loss

The purpose of this study is to test the interactions between the genes and diet interventions varying in macronutrient intake on glycemic, waist circumference, body weight, visceral fat and lipids changes. In the POUNDS LOST, all of the 811 participants DNA was extracted from the buffy coat fraction of centrifuged blood using the QIAmp blood kit (Qiagen, Chatsworth, CA). Single nucleotide polymorphisms were genotyped using the OpenArray™ SNP genotyping system (BioTrove, Woburn, MA). The study is only accepting participants in the Boston, Massachusetts or Baton Rouge, Louisiana area. For further enrollment information in Boston or Baton Rouge, see Eligibility Criteria or Design Narrative.

Besides, the investigators integrated novel pathway analyses in large cohorts and comprehensive genetic analyses on long-term weight loss and mechanisms in randomized diet intervention trials would provide very important evidence to unravel the etiology of obesity, and have significant public health and clinical implications. Establishing relationship between genetic variants and diets in determining weight change will help identify individuals at high risk for obesity especially when adherent to specific diet.

Panoramica dello studio

Stato

Completato

Condizioni

Intervento / Trattamento

Descrizione dettagliata

The epidemic of obesity has become a major public health problem. Obesity is a multifactorial abnormality that has a genetic basis but requires environmental influences to manifest. Common-form obesity is underpinned by both environmental and genetic factors. Recent genome-wide association studies have identified several genes convincingly related to obesity risk. Testing gene-environment interaction is a relatively new field. Evidence from association studies and intervention trials continues to mount, indicating that genetic components may modify lifestyle effects on the development of obesity. However, these findings are at most preliminary. The interplay between genetic and environmental components may facilitate the choice of more effective and specific measures for obesity prevention based on personalized genetic make-up.

The investigators aimed to examine whether the genetic variation affected glycemic, waist circumference, body weight, visceral fat and lipids changes in response to weight-loss dietary intervention varying in macronutrient intake (target percentages of energy derived from fat, protein, and carbohydrate in the 4 diets were as follows 20%, 15% and 65%; 20%, 25%, and 55%; 40%, 15%, and 45%; and 40%, 25%, and 35%).

The primary outcome is to test the interactions between the genes and diet interventions varying in macronutrient intake on body weight changes. The secondary outcome is to test the interactions between the genes and diet interventions varying in macronutrient intake on glycemic, waist circumference, visceral fat, and lipids changes. Understanding gene-diet interactions in relation to weight loss hold great promise for delivering more efficient prevention and treatment on obesity and related metabolic disorders.

In addition, besides gene-diet interactions, the investigators will also conduct other precision nutrition analysis. These analyses include interactions between pretreatment factors with diet intervention adiposity traits, initial changes induced by diet intervention with various outcomes measured in POUNDS Lost, including body weight, waist circumference, body composition, ectopic fat, and bone health.

Tipo di studio

Interventistico

Iscrizione (Effettivo)

811

Fase

  • Non applicabile

Criteri di partecipazione

I ricercatori cercano persone che corrispondano a una certa descrizione, chiamata criteri di ammissibilità. Alcuni esempi di questi criteri sono le condizioni generali di salute di una persona o trattamenti precedenti.

Criteri di ammissibilità

Età idonea allo studio

Da 30 anni a 70 anni (Adulto, Adulto più anziano)

Accetta volontari sani

No

Sessi ammissibili allo studio

Tutto

Descrizione

Inclusion Criteria:

  • Only accepting participants in the Boston, Massachusetts or Baton Rouge, Louisiana area
  • Between the ages of 30 - 70
  • Willing to modify eating pattern according to instructions
  • Overweight or obese and in good health with a BMI of 25-40
  • Committed to a long-term weight loss and maintenance program
  • Willing to attend multiple weight loss group sessions
  • Willing to increase activity level

Exclusion Criteria:

  • Pregnant, planning to become pregnant, or are breastfeeding
  • Unwilling to participate in the schedule of group sessions and individual visits
  • Unstable or recent onset of heart disease or any other serious illness
  • Cannot change diet due to medical or other reasons
  • Planning to leave the area prior to the anticipated end of participation
  • Current participation in another clinical trial with an intervention that affects weight change
  • Have diabetes that is treated with insulin or hypoglycemic oral medicines
  • Diagnosis of psychiatric or emotional problems within 6 months of study
  • Currently have an eating disorder
  • Have hypothyroidism
  • Have an unstable weight

Piano di studio

Questa sezione fornisce i dettagli del piano di studio, compreso il modo in cui lo studio è progettato e ciò che lo studio sta misurando.

Come è strutturato lo studio?

Dettagli di progettazione

  • Scopo principale: Prevenzione
  • Assegnazione: Randomizzato
  • Modello interventistico: Assegnazione fattoriale
  • Mascheramento: Nessuno (etichetta aperta)

Armi e interventi

Gruppo di partecipanti / Arm
Intervento / Trattamento
Sperimentale: diet 1
diet with moderate in fat (40% energy) and protein(15%)
Altro: Preventing Overweight Using Novel Dietary Strategies
The study tests the effectiveness for weight loss and weight maintenance of four diets differing in macronutrient composition: moderate in fat (40% energy) with two different protein levels (15% and 25%), and low in fat (20% energy), also with 15% and 25% protein levels.
Sperimentale: diet 2
diet with moderate in fat (40% energy) and protein(25%)
Altro: Preventing Overweight Using Novel Dietary Strategies
The study tests the effectiveness for weight loss and weight maintenance of four diets differing in macronutrient composition: moderate in fat (40% energy) with two different protein levels (15% and 25%), and low in fat (20% energy), also with 15% and 25% protein levels.
Sperimentale: diet 3
diet with low in fat (20% energy) and protein(15%)
Altro: Preventing Overweight Using Novel Dietary Strategies
The study tests the effectiveness for weight loss and weight maintenance of four diets differing in macronutrient composition: moderate in fat (40% energy) with two different protein levels (15% and 25%), and low in fat (20% energy), also with 15% and 25% protein levels.
Sperimentale: diet 4
diet with low in fat (20% energy) and protein(25%)
Altro: Preventing Overweight Using Novel Dietary Strategies
The study tests the effectiveness for weight loss and weight maintenance of four diets differing in macronutrient composition: moderate in fat (40% energy) with two different protein levels (15% and 25%), and low in fat (20% energy), also with 15% and 25% protein levels.

Cosa sta misurando lo studio?

Misure di risultato primarie

Misura del risultato
Lasso di tempo
Test the interactions between the genes and diet interventions varying in macronutrient intake on body weight changes(weight in kilograms) .
Lasso di tempo: measured at Year 2
measured at Year 2

Misure di risultato secondarie

Misura del risultato
Misura Descrizione
Lasso di tempo
Test the interactions between the genes and diet interventions varying in macronutrient intake on glycemic changes (mg/dL for fasting glucose,uU/mL for fasting insulin).
Lasso di tempo: measured at Year 2
measured at Year 2
Test the interactions between the genes and diet interventions varying in macronutrient intake on waist circumference changes (cm).
Lasso di tempo: measured at Year 2
measured at Year 2
Test the interactions between the genes and diet interventions varying in macronutrient intake on visceral fat changes (%).
Lasso di tempo: measured at Year 2
measured at Year 2
Test the interactions between the genes and diet interventions varying in macronutrient intake on lipids changes (mg/dL for Total cholesterol, HDL cholesterol, LDL cholesterol and Triglycerides).
Lasso di tempo: measured at Year 2
measured at Year 2
Test the interactions between the genes and diet interventions varying in macronutrient intake on bone health (Bone mineral density at different skeletal sites).
Lasso di tempo: measured at Year 2
Bone mineral density was measured by dual-energy X-ray (DEXA)
measured at Year 2

Altre misure di risultato

Misura del risultato
Misura Descrizione
Lasso di tempo
Ectopic fat
Lasso di tempo: 2 year (measured at baseline, 6 months, and 2 years)
Computed tomography (CT) measured hepatic fat, abdominal fat distribution (includes visercal adipose tissue, subcutaneous adipose tissue, and total adipose tissue)
2 year (measured at baseline, 6 months, and 2 years)

Collaboratori e investigatori

Qui è dove troverai le persone e le organizzazioni coinvolte in questo studio.

Sponsor

Tulane University

Collaboratori

Brigham and Women's Hospital

Pubblicazioni e link utili

La persona responsabile dell'inserimento delle informazioni sullo studio fornisce volontariamente queste pubblicazioni. Questi possono riguardare qualsiasi cosa relativa allo studio.

Pubblicazioni generali

Studiare le date dei record

Queste date tengono traccia dell'avanzamento della registrazione dello studio e dell'invio dei risultati di sintesi a ClinicalTrials.gov. I record degli studi e i risultati riportati vengono esaminati dalla National Library of Medicine (NLM) per assicurarsi che soddisfino specifici standard di controllo della qualità prima di essere pubblicati sul sito Web pubblico.

Studia le date principali

Inizio studio (Effettivo)

1 settembre 2003

Completamento primario (Effettivo)

1 dicembre 2010

Completamento dello studio (Effettivo)

1 dicembre 2010

Date di iscrizione allo studio

Primo inviato

11 agosto 2017

Primo inviato che soddisfa i criteri di controllo qualità

21 agosto 2017

Primo Inserito (Effettivo)

23 agosto 2017

Aggiornamenti dei record di studio

Ultimo aggiornamento pubblicato (Effettivo)

29 agosto 2019

Ultimo aggiornamento inviato che soddisfa i criteri QC

26 agosto 2019

Ultimo verificato

1 agosto 2019

Maggiori informazioni

Termini relativi a questo studio

Termini MeSH pertinenti aggiuntivi

Altri numeri di identificazione dello studio

  • R01DK091718 (Sovvenzione/contratto NIH degli Stati Uniti)

Piano per i dati dei singoli partecipanti (IPD)

Hai intenzione di condividere i dati dei singoli partecipanti (IPD)?

NO

Informazioni su farmaci e dispositivi, documenti di studio

Studia un prodotto farmaceutico regolamentato dalla FDA degli Stati Uniti

No

Studia un dispositivo regolamentato dalla FDA degli Stati Uniti

No

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 .

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