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Effects of Daily Walnut Intake Among the Subjects With Metabolic Syndrome

28. august 2017 oppdatert av: ICAN Nutrition Education and Research

Effects of Daily Walnut Intake Among the Subjects With Metabolic Syndrome in South Korea

Investigators planed to conduct a randomized, controlled, crossover trial to examine the effects of daily walnuts intake among Korean subjects with metabolic syndrome. Primary objective of this study was to investigate the effects of daily walnut intake on changes of metabolic syndrome indices in Koreans with metabolic syndrome age over 30 years old. This study was consisted of four periods: run-in, first intervention, wash-out, and second intervention phases. As 16 weeks of first intervention period began after the run-in phase, the subjects were randomly assigned into one of two groups: walnut group and control group. Participants in walnut group consumed 45 grams of walnuts on a daily basis and participants in control group were provided iso-caloric white bread for first 16 weeks. After the first intervention and wash-out period (6 weeks), second intervention which is crossover of first intervention was started during the next 16 weeks. Anthropometric measurements and biochemical analyses were done at the beginning and the end of each intervention (0, 16, 22, and 38 weeks of trial). Habitual diet was randomly observed using 3-day diet record once during each phase.

Investigators expected to evaluate 1)effects of walnut ingestion on reverting metabolic syndrome to normal status especially by reducing waist circumference and improving serum levels of triglyceride and high-density lipoprotein, 2)beneficial effects of daily walnut consumption on changes of body composition in the subjects with metabolic syndrome, and 3)regulatory effects of daily walnut intake on inflammatory markers and diabetic markers.

Studieoversikt

Status

Fullført

Forhold

Intervensjon / Behandling

Studietype

Intervensjonell

Registrering (Faktiske)

119

Fase

  • Ikke aktuelt

Kontakter og plasseringer

Denne delen inneholder kontaktinformasjon for de som utfører studien, og informasjon om hvor denne studien blir utført.

Studiesteder

  • Korea, Republikken
      • Seoul, Korea, Republikken, 07327
        • ICAN Nutrition Education and Research

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

30 år til 55 år (Voksen)

Tar imot friske frivillige

Ja

Kjønn som er kvalifisert for studier

Alle

Beskrivelse

Inclusion Criteria: at least three out of five metabolic syndrome components

  • waist circumference (WC) >90 cm for men and >80 cm for women
  • hypertension (DBP ≥85 and <110 mm Hg)
  • hyperglycemia (≥100 mg/dL)
  • elevated plasma TG concentrations (≥150 mg/dL)
  • decreased plasma HDL-C concentrations (<40 mg/dL for men and <50 mg/dL for women)

Exclusion Criteria:

  • the presence of morbid obesity (BMI ≥40)
  • the use of any medication for the control of blood pressure, glucose, or lipid metabolism
  • a medical history of hypocaloric diet consumption within the past year
  • gastrointestinal tract disorders
  • post-menopausal women
  • smokers

Studieplan

Denne delen gir detaljer om studieplanen, inkludert hvordan studien er utformet og hva studien måler.

Hvordan er studiet utformet?

Designdetaljer

  • Primært formål: Behandling
  • Tildeling: Randomisert
  • Intervensjonsmodell: Crossover-oppdrag
  • Masking: Dobbelt

Våpen og intervensjoner

Deltakergruppe / Arm
Intervensjon / Behandling
Eksperimentell: Walnut-Control
Annen: food
45 g of walnut / iso-caloric white bread
Eksperimentell: Control-Walnut
Annen: food
45 g of walnut / iso-caloric white bread

Hva måler studien?

Primære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
changes of waist circumference
Tidsramme: after 16 weeks of daily walnut consumption
Waist circumferences (cm) were obtained at the midpoint between the lowest rib and the iliac crest and rounded to the nearest 0.1 cm after inhalation and exhalation.
after 16 weeks of daily walnut consumption
changes of blood triglyceride level
Tidsramme: after 16 weeks of daily walnut consumption
Serum triglycerides (mg/dL) levels were measured by an enzymatic-colorimetric method.
after 16 weeks of daily walnut consumption
changes of blood high-density lipoprotein cholesterol levels
Tidsramme: after 16 weeks of daily walnut consumption
High density lipoprotein cholesterol (mg/dL) levels were determined by a homogeneous enzymatic-colorimetric method.
after 16 weeks of daily walnut consumption
changes of blood pressure
Tidsramme: after 16 weeks of daily walnut consumption
Blood pressure (mmHg) was measured on the right arm using an up-load blood pressure monitor with participants in a comfortably seated position after at least a 5-minute rest.
after 16 weeks of daily walnut consumption
changes of blood glucose level
Tidsramme: after 16 weeks of daily walnut consumption
Blood glucose levels (mg/dL) were measured using blood glucose monitor and test stripts from the finger tip.
after 16 weeks of daily walnut consumption

Sekundære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
changes of total cholesterol level
Tidsramme: after 16 weeks of daily walnut consumption
Serum total cholesterol levels (ml/dL) were measured by an enzymatic-colorimetric method.
after 16 weeks of daily walnut consumption
changes of serum apolipoprotein B level
Tidsramme: after 16 weeks of daily walnut consumption
Serum apolipoprotein B (ml/dL) was measured using a turbidimetric immunoassay.
after 16 weeks of daily walnut consumption
changes of serum adiponectin level
Tidsramme: after 16 weeks of daily walnut consumption
Blood adiponectin (ug/mL) levels were measured using ELISA.
after 16 weeks of daily walnut consumption
changes of serum leptin level
Tidsramme: after 16 weeks of daily walnut consumption
Blood leptin (ug/mL) levels were measured using ELISA.
after 16 weeks of daily walnut consumption
changes of serum insulin level
Tidsramme: after 16 weeks of daily walnut consumption
Serum insulin (μU/mL) was measured with a commercially available kit, the ultrasensitive insulin ELISA kit using an Epoch microplate spectrophotometer.
after 16 weeks of daily walnut consumption
changes of low-density lipoprotein cholesterol level
Tidsramme: after 16 weeks of daily walnut consumption
Low-density lipoprotein cholesterol levels (ml/dL) were determined by a homogeneous enzymatic-colorimetric method.
after 16 weeks of daily walnut consumption

Samarbeidspartnere og etterforskere

Det er her du vil finne personer og organisasjoner som er involvert i denne studien.

Sponsor

ICAN Nutrition Education and Research

Samarbeidspartnere

California Walnut Commission

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

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 (Faktiske)

1. mai 2015

Primær fullføring (Faktiske)

30. juli 2017

Studiet fullført (Faktiske)

30. juli 2017

Datoer for studieregistrering

Først innsendt

14. august 2017

Først innsendt som oppfylte QC-kriteriene

28. august 2017

Først lagt ut (Faktiske)

30. august 2017

Oppdateringer av studieposter

Sist oppdatering lagt ut (Faktiske)

30. august 2017

Siste oppdatering sendt inn som oppfylte QC-kriteriene

28. august 2017

Sist bekreftet

1. august 2017

Mer informasjon

Begreper knyttet til denne studien

Ytterligere relevante MeSH-vilkår

Andre studie-ID-numre

  • CWC-2016-MetS

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