- ICH GCP
- US Clinical Trials Registry
- Klinisk utprøving NCT01299519
Progressive Weight Loss and Metabolic Health (PWL)
30. juni 2017 oppdatert av: Washington University School of Medicine
This study will evaluate the potential beneficial cardiometabolic effect of moderate (5%) weight loss and progressive (5%, 10%, and 15%) weight loss in obese adults without diabetes.
Participants will be randomly assigned to one of 2 groups.
Group 1: supervised weight loss group (low-calorie diet).
Group 2: supervised weight maintenance group (normal diet).
Of those assigned to group 1, half of the participants will lose 5% of their body weight and the other half will lose 5%, 10%, and 15% of their weight over time under the guidance of a dietitian.
Research testing will be repeated at each time point (5%, 10%, and 15% weight loss).
In group 2, research testing will be repeated after six months.
Studieoversikt
Status
Fullført
Forhold
Intervensjon / Behandling
Studietype
Intervensjonell
Registrering (Faktiske)
59
Fase
- Ikke aktuelt
Kontakter og plasseringer
Denne delen inneholder kontaktinformasjon for de som utfører studien, og informasjon om hvor denne studien blir utført.
Studiesteder
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Missouri
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Saint Louis, Missouri, Forente stater, 63110
- Washington University School of Medicine
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Deltakelseskriterier
Forskere ser etter personer som passer til en bestemt beskrivelse, kalt kvalifikasjonskriterier. Noen eksempler på disse kriteriene er en persons generelle helsetilstand eller tidligere behandlinger.
Kvalifikasjonskriterier
Alder som er kvalifisert for studier
21 år til 65 år (Voksen, Eldre voksen)
Tar imot friske frivillige
Nei
Kjønn som er kvalifisert for studier
Alle
Beskrivelse
Inclusion Criteria:
- Obese: Body Mass Index from 30 to 45
- Insulin Resistant: HOMA-IR score greater than or equal to 2
Exclusion Criteria:
- diabetes
- smoking
- pregnancy
- breastfeeding
- heart failure
- history of liver disease including hepatitis
- alcoholism
- exercise more than 2 hours per week
Studieplan
Denne delen gir detaljer om studieplanen, inkludert hvordan studien er utformet og hva studien måler.
Hvordan er studiet utformet?
Designdetaljer
- Primært formål: Grunnvitenskap
- Tildeling: Randomisert
- Intervensjonsmodell: Parallell tildeling
- Masking: Ingen (Open Label)
Våpen og intervensjoner
Deltakergruppe / Arm |
Intervensjon / Behandling |
|---|---|
|
Eksperimentell: Weight Loss
Half of the subjects in the weight loss arm will lose 5% of their weight through a low-calorie diet, and half will also lose 10% and 15% body weight.
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Half of the subjects in the weight loss arm will lose 5% of their weight through a low-calorie diet, and half will also lose 10% and 15% body weight.
|
|
Aktiv komparator: Weight Maintenance
Subjects in the weight maintenance arm will maintain a steady body weight (plus or minus 2% of initial body weight) for six months.
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Subjects in the weight maintenance arm will maintain a steady body weight (plus or minus 2% of initial body weight) for six months.
|
Hva måler studien?
Primære resultatmål
Resultatmål |
Tiltaksbeskrivelse |
Tidsramme |
|---|---|---|
|
Insulin Sensitivity
Tidsramme: baseline through weight loss (approximately one year)
|
In the weight-loss arm we will measure insulin sensitivity at baseline, after 5% weight loss, after 10% weight loss and again after 15% weight loss.
Each weight loss phase will last an average of four months for a total of approximately one year.
In the weight maintenance arm we will measure insulin sensitivity at baseline and after six months.
|
baseline through weight loss (approximately one year)
|
|
intra-hepatic triglyceride
Tidsramme: baseline through weight loss (approximately one year)
|
In the weight-loss arm we will measure intra-hepatic triglyceride at baseline, after 5% weight loss, after 10% weight loss and again after 15% weight loss.
Each weight loss phase will last an average of four months for a total of approximately one year.
In the weight maintenance arm we will measure intra-hepatic triglyceride at baseline and after six months.
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baseline through weight loss (approximately one year)
|
Sekundære resultatmål
Resultatmål |
Tiltaksbeskrivelse |
Tidsramme |
|---|---|---|
|
total cholesterol
Tidsramme: baseline through weight loss (approximately one year)
|
In the weight-loss arm we will measure total cholesterol at baseline, after 5% weight loss, after 10% weight loss and again after 15% weight loss.
Each weight loss phase will last an average of four months for a total of approximately one year.
In the weight maintenance arm we will measure total cholesterol at baseline and after six months.
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baseline through weight loss (approximately one year)
|
|
systolic blood pressure
Tidsramme: baseline through weight loss (approximately one year)
|
In the weight-loss arm we will measure systolic blood pressure at baseline, after 5% weight loss, after 10% weight loss and again after 15% weight loss.
Each weight loss phase will last an average of four months for a total of approximately one year.
In the weight maintenance arm we will measure systolic blood pressure at baseline and after six months.
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baseline through weight loss (approximately one year)
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Cell proliferation (growth) rates in the colon - optional procedure
Tidsramme: baseline through weight loss (approximately four months to one year)
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Colon cell proliferation rates will be determined using stable isotope labelled tracer methods in conjunction with sigmoid colon biopsy samples.
In the weight-loss arm we will measure colonocyte proliferation rate at baseline, and once again after weight loss (either 5% weight loss, or 10% weight loss, or 15% weight loss; i.e.
only one time after weight loss).
Each weight loss phase will last an average of four months for a total of approximately one year.
In the weight maintenance arm we will measure colonocyte proliferation rate at baseline and after six months.
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baseline through weight loss (approximately four months to one year)
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Samarbeidspartnere og etterforskere
Det er her du vil finne personer og organisasjoner som er involvert i denne studien.
Publikasjoner og nyttige lenker
Den som er ansvarlig for å legge inn informasjon om studien leverer frivillig disse publikasjonene. Disse kan handle om alt relatert til studiet.
Generelle publikasjoner
- Yoshino J, Patterson BW, Klein S. Adipose Tissue CTGF Expression is Associated with Adiposity and Insulin Resistance in Humans. Obesity (Silver Spring). 2019 Jun;27(6):957-962. doi: 10.1002/oby.22463. Epub 2019 Apr 19.
- Volkow ND, Wang GJ, Telang F, Fowler JS, Goldstein RZ, Alia-Klein N, Logan J, Wong C, Thanos PK, Ma Y, Pradhan K. Inverse association between BMI and prefrontal metabolic activity in healthy adults. Obesity (Silver Spring). 2009 Jan;17(1):60-5. doi: 10.1038/oby.2008.469. Epub 2008 Oct 23.
- van Vliet S, Koh HE, Patterson BW, Yoshino M, LaForest R, Gropler RJ, Klein S, Mittendorfer B. Obesity Is Associated With Increased Basal and Postprandial beta-Cell Insulin Secretion Even in the Absence of Insulin Resistance. Diabetes. 2020 Oct;69(10):2112-2119. doi: 10.2337/db20-0377. Epub 2020 Jul 10.
- de Jonge L, Moreira EA, Martin CK, Ravussin E; Pennington CALERIE Team. Impact of 6-month caloric restriction on autonomic nervous system activity in healthy, overweight, individuals. Obesity (Silver Spring). 2010 Feb;18(2):414-6. doi: 10.1038/oby.2009.408. Epub 2009 Nov 12.
- McLaughlin T, Abbasi F, Kim HS, Lamendola C, Schaaf P, Reaven G. Relationship between insulin resistance, weight loss, and coronary heart disease risk in healthy, obese women. Metabolism. 2001 Jul;50(7):795-800. doi: 10.1053/meta.2001.24210.
- Chondronikola M, Magkos F, Yoshino J, Okunade AL, Patterson BW, Muehlbauer MJ, Newgard CB, Klein S. Effect of Progressive Weight Loss on Lactate Metabolism: A Randomized Controlled Trial. Obesity (Silver Spring). 2018 Apr;26(4):683-688. doi: 10.1002/oby.22129. Epub 2018 Feb 24.
Studierekorddatoer
Disse datoene sporer fremdriften for innsending av studieposter og sammendragsresultater til ClinicalTrials.gov. Studieposter og rapporterte resultater gjennomgås av National Library of Medicine (NLM) for å sikre at de oppfyller spesifikke kvalitetskontrollstandarder før de legges ut på det offentlige nettstedet.
Studer hoveddatoer
Studiestart
1. februar 2011
Primær fullføring (Faktiske)
1. september 2015
Studiet fullført (Faktiske)
1. april 2016
Datoer for studieregistrering
Først innsendt
10. februar 2011
Først innsendt som oppfylte QC-kriteriene
17. februar 2011
Først lagt ut (Anslag)
18. februar 2011
Oppdateringer av studieposter
Sist oppdatering lagt ut (Faktiske)
5. juli 2017
Siste oppdatering sendt inn som oppfylte QC-kriteriene
30. juni 2017
Sist bekreftet
1. juni 2017
Mer informasjon
Begreper knyttet til denne studien
Nøkkelord
Ytterligere relevante MeSH-vilkår
Andre studie-ID-numre
- 201012904
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