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Effects of Lignan-rich Diet on Cardiometabolic Risk Factors

6. december 2016 opdateret af: Dr. Rikard Landberg, Swedish University of Agricultural Sciences
Diet plays an important role in relation to prevention of type 2 diabetes, cardiovascular disease and certain cancers. Studies have shown that diets with high whole-grain content could decrease the risk of these lifestyle related diseases and in Sweden the national dietary guidelines recommends whole-grain based instead of refined cereal products. It is, however, not clear whether whole-grain from wheat and rye share similar protective effects since there are large differences in amount and quality of dietary fibre and associated bioactive compounds. The aim of this study is to evaluate the impact of a wholegrain diet with low- or high lignan content on different cardiometabolic risk factors with the primary endpoint being blood glucose levels after 2h oral glucose tolerance test in men with metabolic syndrome or sign thereof.

Studieoversigt

Status

Afsluttet

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

The study will be conducted in a randomized, cross-over design (8 wk intervention periods). The lignan-rich diet will be based on whole-grain rye products whereas the control diet will be based on whole-grain wheat products with some added wheat bran. Both diets will provide similar amount of whole grain (g/d) and total dietary fiber content (but dietary fibre quality will be different). Although rye has high lignan content, the aim is to further increase the lignan intake half-way through the whole grain rye intervention period. This will allow us to distinguish the effect of lignans from the effect of whole grain rye as well as evaluating potential differences in effects on cardiometabolic risk factors between whole grain wheat and whole grain rye intake after 4-week consumption. The study design will also allow us to investigate the effects of a putative interaction between microbiome x lignan rich diet and its implication of metabolic risk factors.

Blood samples will be collected by trained nurses at screening, baseline, after 4 weeks and 8 weeks of first intervention period, after wash-out (8 weeks), and after 4 weeks and 8 weeks of the second intervention period.

At each examination day participants will arrive to the test laboratory for blood samples and an oral glucose tolerance test (OGTT) where participants will be given a drink with 75 g of glucose to consume within 10 minutes. Blood samples will be taken after 30, 60 and 120 minutes. Furthermore, participants will be instructed to complete one 3-day weighted food record and also to collect 24-h urine and a fecal sample at week 0, 4, 8, 16, 20 and 24.

Undersøgelsestype

Interventionel

Tilmelding (Faktiske)

41

Fase

  • Ikke anvendelig

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiesteder

  • Sverige
      • Uppsala, Sverige, SE-751 85
        • Paediatric Research Facility; The Children's Hospital at Uppsala University Hospital

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

40 år til 75 år (Voksen, Ældre voksen)

Tager imod sunde frivillige

Ja

Køn, der er berettiget til at studere

Han

Beskrivelse

Inclusion Criteria:

  • BMI > 25 kg/m2
  • waist circumference > 102 cm
  • at least one of the following: blood pressure >130/85 mmHg, serum triglycerides ≥1.69 mmol/L; HDL cholesterol <1.04 mmol/L; or serum glucose ≥6.1 mmol/L

Exclusion Criteria:

  • smokers
  • antibiotic use past 6 months
  • cancer diagnose (past 5 years) or other chronic disease diagnosis
  • excessive alcohol consumption (>21 units/week)

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Forebyggelse
  • Tildeling: Randomiseret
  • Interventionel model: Crossover opgave
  • Maskning: Ingen (Åben etiket)

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: Whole-grain rye then wheat
Whole-grain rye, high lignan Whole-grain rye products for 8 weeks, then a wash-out period of 8 weeks, and then whole-grain wheat products for 8 weeks
Andet: Whole-grain rye, high lignan
Intervention week 1-8: 50 g rolled rye + 50 g puffs + 4 pieces of crisp bread + 70 g pasta. Additionally for intervention week 4-8: 4 lignan capsules per day
Andet: Whole-grain wheat, low lignan
Intervention week 1-8: 100 g puffs + 4 pieces of crisp bread + 70 g pasta.
Eksperimentel: Whole-grain wheat then rye
Whole-grain wheat, low lignan Whole-grain wheat products for 8 weeks, then a wash-out period of 8 weeks, and then whole-grain rye products for 8 weeks
Andet: Whole-grain rye, high lignan
Intervention week 1-8: 50 g rolled rye + 50 g puffs + 4 pieces of crisp bread + 70 g pasta. Additionally for intervention week 4-8: 4 lignan capsules per day
Andet: Whole-grain wheat, low lignan
Intervention week 1-8: 100 g puffs + 4 pieces of crisp bread + 70 g pasta.

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Tidsramme
Blood glucose levels
Tidsramme: 8 weeks
8 weeks

Sekundære resultatmål

Resultatmål
Tidsramme
Blood lipids
Tidsramme: 8 weeks
8 weeks
Inflammatory markers
Tidsramme: 8 weeks
8 weeks
Oxidative stress markers
Tidsramme: 8 weeks
8 weeks
Enterolignans in blood and urine
Tidsramme: 8 weeks
8 weeks

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Swedish University of Agricultural Sciences

Efterforskere

  • Ledende efterforsker: Rikard Landberg, Swedish University of Agricultural Sciences

Publikationer og nyttige links

Den person, der er ansvarlig for at indtaste oplysninger om undersøgelsen, leverer frivilligt disse publikationer. Disse kan handle om alt relateret til undersøgelsen.

Generelle publikationer

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart

1. juni 2015

Primær færdiggørelse (Faktiske)

1. oktober 2016

Studieafslutning (Faktiske)

1. oktober 2016

Datoer for studieregistrering

Først indsendt

16. juni 2015

Først indsendt, der opfyldte QC-kriterier

6. december 2016

Først opslået (Skøn)

9. december 2016

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Skøn)

9. december 2016

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

6. december 2016

Sidst verificeret

1. december 2016

Mere information

Begreber relateret til denne undersøgelse

Nøgleord

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • SwedishUAS

Disse oplysninger blev hentet direkte fra webstedet clinicaltrials.gov uden ændringer. Hvis du har nogen anmodninger om at ændre, fjerne eller opdatere dine undersøgelsesoplysninger, bedes du kontakte register@clinicaltrials.gov. Så snart en ændring er implementeret på clinicaltrials.gov, vil denne også blive opdateret automatisk på vores hjemmeside .

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