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Intervention With Omega Fatty Acids in High-risk Patients

19. december 2016 opdateret af: Haukeland University Hospital

Intervention With Omega Fatty Acids in High-risk Patients With Hypertriglyceridemic Waist

In order to reduce cardiovascular risk, current European guidelines recommend a diet low on saturated fatty acid through replacement with polyunsaturated fatty acids (PUFA). Polyunsaturated fatty acids can be classified into omega-3 and omega-6. However the results from recent meta-analyses investigating coronary risk outcomes did not clearly support a low intake of saturated fatty acids and a high intake of omega-3 or omega-6. The aim of this study is to investigate the short term effects of a high intake of PUFAs on microvascular function, lipids, inflammation and other cardiovascular risk factors in inactive patients with increased waistline.

Studieoversigt

Status

Afsluttet

Betingelser

Intervention / Behandling

Undersøgelsestype

Interventionel

Tilmelding (Faktiske)

40

Fase

  • Fase 2

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

30 år til 70 år (Voksen, Ældre voksen)

Tager imod sunde frivillige

Ja

Køn, der er berettiget til at studere

Alle

Beskrivelse

Inclusion Criteria:

  • Waist circumference ≥ 94 cm in men and ≥ 80 cm in women
  • Physical inactivity (< 2 h vigorous/active exercise training per week)

Exclusion Criteria:

  • Regular use of certain prescription medications at baseline
  • Severe psychiatric illness
  • Pregnancy
  • Pacemaker or implantable cardioverter defibrillator
  • Cigarette smoking
  • Previous coronary intervention
  • Concomitant use of dietary supplements
  • Use of omega-3 supplements at baseline
  • Alcohol or drug abuse or any condition associated with poor compliance.
  • Scheduled hospitalisation during the course of the study.
  • Participation in a clinical trial in the last 12 weeks, or prior randomisation.
  • Blood donation within the preceding 12 weeks.
  • Diabetes Mellitus Type 1 or type 2
  • Triglycerides > 5 mmol/l
  • Previous bariatric surgery
  • Malabsorption disorder

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: Tredobbelt

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: Omega-3 fatty acid
Omega-3 fatty acids for 8 weeks, dosage are 3 and 4 g/day for women and men, respectively.
Kosttilskud: Omega-3 Fatty Acid
Experimental: Omega-3 fatty acid In the intervention period the participants will receive a daily supplement of omega-3 fatty acids for 8 weeks, where the dosage are 3 and 4 g/day for women and men, respectively. The omega-3 supplement is a hydrolyzed and reesterified TAG fish oil, containing 33 area percent eicosapentaenoic acid and 22 area percent docosahexaenoic acid.
Andre navne:
  • Omega 3
  • Fiskeolie
  • N-3 fedtsyre
  • N-3 PUFA
Eksperimentel: Omega-6 fatty acid
Omega-6 fatty acids for 8 weeks, dosage are 20 and 27 g/day for women and men, respectively.
Kosttilskud: Omega-6 Fatty Acid
Experimental: Omega-6 fatty acid In the intervention period the participants will receive a daily supplement of omega-6 fatty acid for 8 weeks, where the dosage are 20 and 27 g/day for women and men, respectively. The omega-6 supplement is a high-quality organic, cold pressed and filtered safflower oil, containing 68-83% linoleic acid, 5-15% saturated fatty acid, 8-21% oleic acid, 0,0-0,5% ALA and maximum 2% other fatty acids.
Andre navne:
  • Omega-6
  • N-6 Fatty Acid
  • N-6 PUFA

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Changes in lipid profile
Tidsramme: Measured at baseline and after 8 weeks
High-density lipoprotein cholesterol (HDL-C), low-density lipoprotein cholesterol (LDL-C), total cholesterol and triglycerides (TG) will be measured in plasma/serum (mmol/L).
Measured at baseline and after 8 weeks
Changes in particle concentrations of lipoproteins of different sizes
Tidsramme: Measured at baseline and week 8
Particle concentration (nmol/L) of lipoprotein of different sizes will be calculated from the measured amplitude of their spectroscopically lipid methyl group NMR signals.
Measured at baseline and week 8
Changes in lipoprotein particle sizes
Tidsramme: Measured at baseline and week 8
Lipoprotein particle size (nm) analysis will be performed by proton nuclear magnetic resonance (NMR) spectroscopy. The size will be derived from the sum of diameter of each subclass multiplied by its relative mass percentage based on its methyl NMR signal.
Measured at baseline and week 8

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Changes in body composition
Tidsramme: Measured at baseline and week 8
Body composition will be measured by bioelectrical impedance (InBody 720).
Measured at baseline and week 8
Changes in body weight
Tidsramme: Measured at baseline and week 8
Measured at baseline and week 8
Changes in waist and hip circumference
Tidsramme: Measured at baseline and week 8
Measured at baseline and week 8
Changes in circulating markers of inflammation, also including adipokines and kynurenine
Tidsramme: Measured at baseline and week 8
Inflammatory markers and adipokines will be measured in serum/plasma, e.g tumor necrosis factor-α (TNF-α), interleukins, macrophage inflammatory protein 1-α (MIP-1-α) and granulocyte-macrophage colony stimulating factor (GM-CSF).
Measured at baseline and week 8
Changes in markers of inflammation in adipose tissue
Tidsramme: Measured at baseline and week 8
Inflammatory markers like TNF-α, interleukins, GM-CSF and adiponectin in will be measured in adipose tissue (pg/mg tissue).
Measured at baseline and week 8
Changes in one carbon metabolites
Tidsramme: Measured at baseline and week 8
Choline, betaine and related metabolites and B-vitamins involved in 1-carbon metabolism.
Measured at baseline and week 8
Changes in microbiota
Tidsramme: Measured at baseline and week 8
Bacterial DNA in stool samples will be subjected to high-throughput barcode multiplex sequencing of the 16s ribosomal RNA gene (rRNA).
Measured at baseline and week 8
Changes in endothelial function
Tidsramme: Measured at baseline and week 8
Vascular reactivity index (VRI) will be measured by monitoring fingertip temperature changes during a reactive hyperemia protocol.
Measured at baseline and week 8
Changes in carnitine and metabolites
Tidsramme: Measured at baseline and week 8
Trimethylamine N-oxide (TMAO), carnitine, acylcarnitines and fatty acids will be measured in serum/plasma.
Measured at baseline and week 8
Changes in gene expression in adipose tissue
Tidsramme: Measured at baseline and week 8
Gene expression in adipose tissue will be measured by microarray and quantitative PCR.
Measured at baseline and week 8
Changes in amino acids
Tidsramme: Measured at baseline and week 8
Amino acids, methylated amino acids and metabolites will be measured in serum/plasma.
Measured at baseline and week 8
Changes in gene expression i whole blood
Tidsramme: Measured at baseline and week 8
Gene expression in full blood will be measured by quantitative PCR.
Measured at baseline and week 8
Changes in apolipoproteins
Tidsramme: Measured at baseline and week 8
Apolipoproteins A1, A2, B, C2, C3 and E will be measured in serum by a multiplex kit.
Measured at baseline and week 8

Samarbejdspartnere og efterforskere

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

Sponsor

Haukeland University Hospital

Samarbejdspartnere

University of Oslo
University of Bergen

Efterforskere

  • Ledende efterforsker: Espen Rostrup, MD PhD, Haukeland University Hospital, Department of Heart Disease

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. marts 2015

Primær færdiggørelse (Faktiske)

1. april 2016

Studieafslutning (Faktiske)

1. april 2016

Datoer for studieregistrering

Først indsendt

9. september 2015

Først indsendt, der opfyldte QC-kriterier

4. januar 2016

Først opslået (Skøn)

6. januar 2016

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Skøn)

20. december 2016

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

19. december 2016

Sidst verificeret

1. december 2016

Mere information

Begreber relateret til denne undersøgelse

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • 2014/2336

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 .

Kliniske forsøg med Kardiovaskulær sygdom

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