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Intervention With Omega Fatty Acids in High-risk Patients

19 december 2016 uppdaterad av: 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.

Studieöversikt

Status

Avslutad

Betingelser

Intervention / Behandling

Studietyp

Interventionell

Inskrivning (Faktisk)

40

Fas

  • Fas 2

Deltagandekriterier

Forskare letar efter personer som passar en viss beskrivning, så kallade behörighetskriterier. Några exempel på dessa kriterier är en persons allmänna hälsotillstånd eller tidigare behandlingar.

Urvalskriterier

Åldrar som är berättigade till studier

30 år till 70 år (Vuxen, Äldre vuxen)

Tar emot friska volontärer

Ja

Kön som är behöriga för studier

Allt

Beskrivning

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

Det här avsnittet ger detaljer om studieplanen, inklusive hur studien är utformad och vad studien mäter.

Hur är studien utformad?

Designdetaljer

  • Primärt syfte: Förebyggande
  • Tilldelning: Randomiserad
  • Interventionsmodell: Crossover tilldelning
  • Maskning: Trippel

Vapen och interventioner

Deltagargrupp / Arm
Intervention / Behandling
Experimentell: Omega-3 fatty acid
Omega-3 fatty acids for 8 weeks, dosage are 3 and 4 g/day for women and men, respectively.
Kosttillskott: 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.
Andra namn:
  • Omega 3
  • Fisk olja
  • N-3 fettsyra
  • N-3 PUFA
Experimentell: Omega-6 fatty acid
Omega-6 fatty acids for 8 weeks, dosage are 20 and 27 g/day for women and men, respectively.
Kosttillskott: 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.
Andra namn:
  • Omega-6
  • N-6 Fatty Acid
  • N-6 PUFA

Vad mäter studien?

Primära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
Changes in lipid profile
Tidsram: 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
Tidsram: 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
Tidsram: 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

Sekundära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
Changes in body composition
Tidsram: 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
Tidsram: Measured at baseline and week 8
Measured at baseline and week 8
Changes in waist and hip circumference
Tidsram: Measured at baseline and week 8
Measured at baseline and week 8
Changes in circulating markers of inflammation, also including adipokines and kynurenine
Tidsram: 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
Tidsram: 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
Tidsram: 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
Tidsram: 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
Tidsram: 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
Tidsram: 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
Tidsram: 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
Tidsram: 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
Tidsram: 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
Tidsram: 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

Samarbetspartners och utredare

Det är här du hittar personer och organisationer som är involverade i denna studie.

Sponsor

Haukeland University Hospital

Samarbetspartners

University of Oslo
University of Bergen

Utredare

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

Publikationer och användbara länkar

Den som ansvarar för att lägga in information om studien tillhandahåller frivilligt dessa publikationer. Dessa kan handla om allt som har med studien att göra.

Allmänna publikationer

Studieavstämningsdatum

Dessa datum spårar framstegen för inlämningar av studieposter och sammanfattande resultat till ClinicalTrials.gov. Studieposter och rapporterade resultat granskas av National Library of Medicine (NLM) för att säkerställa att de uppfyller specifika kvalitetskontrollstandarder innan de publiceras på den offentliga webbplatsen.

Studera stora datum

Studiestart

1 mars 2015

Primärt slutförande (Faktisk)

1 april 2016

Avslutad studie (Faktisk)

1 april 2016

Studieregistreringsdatum

Först inskickad

9 september 2015

Först inskickad som uppfyllde QC-kriterierna

4 januari 2016

Första postat (Uppskatta)

6 januari 2016

Uppdateringar av studier

Senaste uppdatering publicerad (Uppskatta)

20 december 2016

Senaste inskickade uppdateringen som uppfyllde QC-kriterierna

19 december 2016

Senast verifierad

1 december 2016

Mer information

Termer relaterade till denna studie

Ytterligare relevanta MeSH-villkor

Andra studie-ID-nummer

  • 2014/2336

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