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Metabolic Syndrome and Insulin Resistance at Allina (MISURA)

30. august 2016 oppdatert av: Jeffery Dusek, Allina Health System

Randomized, Controlled Trial of Vitamin D Replenishment in Metabolic Syndrome

Vitamin D deficiency is widespread and appears to represent one easily and inexpensively modifiable risk factor for diabetes and cardiovascular disease. More than 40 years of data link hypovitaminosis D to metabolic syndrome, insulin resistance, hyperglycemia, type 2 diabetes and increased cardiovascular risk.

Screening for vitamin D deficiency followed by supplementation in appropriate individuals could be among the simplest and most cost-effective measures for reducing metabolic syndrome and insulin resistance in the general population.

This study will test the hypothesis that increasing vitamin D status in vitamin D deficient individuals with metabolic syndrome will:

  1. reduce multiple serum cardiometabolic risk factors for both diabetes and cardiovascular disease,
  2. stabilize or reverse the stage of pre-diabetes,
  3. improve quality of life, and,
  4. improve the ability to make health-related behavioral changes.

Studieoversikt

Status

Fullført

Forhold

Intervensjon / Behandling

Detaljert beskrivelse

Longitudinal observational studies suggest a significant inverse association between vitamin D status and both incident and prevalent metabolic syndrome/type II diabetes. Results from small underpowered trials and post-hoc analyses of data from larger trials designed for bone-specific outcomes suggest that vitamin D may slow the progression to diabetes in adults with glucose intolerance. However, at this time, no randomized trials of sufficient size exist to assess effectiveness.

Importantly, in the investigators' own study of over 10,000 Allina employees, the investigators found that 6% of these employees had levels less than 10 ng/mL, 30% less than 20 ng/ml and 60% less than 30 ng/ml. Recently, the Intermountain Heart Collaborative Study Group reviewed 41,504 patient records with at least one measured vitamin D level. Surprisingly, both the Intermountain and the Allina Employee study demonstrate vitamin D deficiency (≤30 ng/ml) in more than 60% of people tested with only minor differences by gender or age (Plotnikoff GA, Finch M, Dusek JA. Impact of Vitamin D Deficiency on the Productivity of a Health Care Workforce. J Occup Environ Med (in press)).

Furthermore, the Intermountain group demonstrated that vitamin D levels less than 30 ng/ml, compared to levels greater than 30 ng/ml, were associated with highly significant (p <0.0001) increases in the prevalence of diabetes, hypertension, hyperlipidemia, and peripheral vascular disease. Also, those without risk factors but with severe deficiency had an increased likelihood of developing diabetes, hypertension, and hyperlipidemia. The vitamin D levels were also highly associated with coronary artery disease, myocardial infarction, heart failure, and stroke (all p <0.0001), as well as with incident death, heart failure, coronary artery disease/myocardial infarction (all p <0.0001), stroke (p = 0.003), and their composite (p <0.0001).

Numerous prevention efforts are underway to minimize the predicted economic and human burdens from these increasingly common diseases. However, few, if any, prospective clinical trials are underway with vitamin D interventions. This trial is specifically designed to prospectively test the impact of vitamin D replenishment on both metabolic syndrome and insulin resistance.

The 2011 Endocrine Society guidelines assert that vitamin D intakes above the current recommendations may be associated with better health outcomes. However, there is no consensus on the optimal 25(OH)D concentration necessary to minimize metabolic syndrome, insulin resistance and progression to diabetes. This trial is designed to prospectively identify optimal serum levels for reduction of cardiometabolic risk factors.

Studietype

Intervensjonell

Registrering (Faktiske)

84

Fase

  • Fase 2

Kontakter og plasseringer

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

Studiesteder

  • Forente stater
    • Minnesota
      • Minneapolis, Minnesota, Forente stater, 55407
        • Allina Health

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

18 år og eldre (Voksen, Eldre voksen)

Tar imot friske frivillige

Ja

Kjønn som er kvalifisert for studier

Alle

Beskrivelse

Please Note: All participants must be an employee of Allina Health or the spouse of an Allina employee.

Inclusion Criteria:

  • Vitamin D deficiency, defined as 25-OH vitamin D ≤ 25 ng/ml
  • Metabolic syndrome as defined by more than three or more of the following:

Elevated waist circumference

  • Men - Equal to or greater than 40 inches
  • Women - Equal to or greater than 35 inches
  • Elevated serum triglycerides (≥150 mg/dL)
  • Men - Less than 40 mg/dL
  • Women - Less than 50 mg/dL
  • Elevated blood pressure (≥130/85 or use of medication for hypertension)
  • Elevated fasting glucose (≥100 mg/dL or use of medication for hyperglycemia)

Exclusion Criteria:

  • Known cardiovascular disease defined as current or prior coronary heart disease, stroke/transient ischemic attack, heart failure, or peripheral vascular disease.
  • During the study, addition of any medications known to change outcome measures including medications or supplements for hyperlipidemia, hypertension, weight loss, diabetes.
  • Current Vitamin D supplementation beyond that found in a multivitamin (400 IU)
  • Current calcium supplementation greater than 600 mg
  • Untreated blood pressure greater than 159/99 at baseline
  • Treated blood pressure greater than 150/90 at baseline
  • Any condition which could limit the ability to complete and comply with 6-month study
  • Unwillingness or inability to comply with study requirements
  • Known allergy to coconut or coconut oil

Studieplan

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

Hvordan er studiet utformet?

Designdetaljer

  • Primært formål: Forebygging
  • Tildeling: Randomisert
  • Intervensjonsmodell: Parallell tildeling
  • Masking: Firemannsrom

Våpen og intervensjoner

Deltakergruppe / Arm
Intervensjon / Behandling
Aktiv komparator: Regular Dose
Intervention: 600 IUs of cholecalciferol taken by mouth daily.
Kosttilskudd: vitamin D3 (cholecalciferol)
Active intervention: 6,000 IUs taken by mouth daily for 6 months Active Comparator: 600 IUs taken by mouth daily for 6 months
Andre navn:
  • D-Drops
Eksperimentell: High Dose D
Intervention: 6,000 IUs of cholecalciferol taken by mouth daily.
Kosttilskudd: vitamin D3 (cholecalciferol)
Active intervention: 6,000 IUs taken by mouth daily for 6 months Active Comparator: 600 IUs taken by mouth daily for 6 months
Andre navn:
  • D-Drops

Hva måler studien?

Primære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
insulin resistance score by NMR lipid fractionation
Tidsramme: 6 months
additional insulin resistance measure
6 months
Reynolds Risk Score
Tidsramme: 6 months
The Reynolds Risk Score is designed to predict one's risk of having a future heart attack, stroke, or other major heart disease in the next 10 years. In addition to your age, blood pressure, cholesterol levels and whether you currently smoke, the Reynolds Risk Score uses information from two other risk factors, a blood test called hsCRP (a measure of inflammation) and whether or not either of your parents had a heart attack before they reached age 60 (a measure of genetic risk).
6 months
Pre-diabetes stage
Tidsramme: 6 months
The pre-diabetes stage, a marker of progression toward type 2 diabetes mellitus, is a calculated score based upon results of fasting adiponectin, insulin and proinsulin.
6 months

Sekundære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
blodtrykk
Tidsramme: 6 måneder
6 måneder
vekt
Tidsramme: 6 måneder
6 måneder
25-OH-vitamin D
Tidsramme: 6 months
25-OH-vitamin D is the best measure of vitamin D status.
6 months
fasting lipid profile
Tidsramme: 6 months
6 months
adiposity markers
Tidsramme: 6 months

Adiponectin: This adipocyte-derived protein increases hepatic and peripheral insulin sensitivity, moderates fat tissue growth, decreases lipid and glucose production in the liver and suppresses vascular inflammation. This measure declines as insulin resistance increases.

Leptin: This adipocyte-derived hormone plays a key role in regulating neuroendocrine and immune function, appetite, metabolic rate and body weight. Many overweight individuals have elevated levels and leptin resistance.
6 months
TNF-alpha
Tidsramme: 6 months
Inflammatory markers: TNF-alpha, IL-6, IL-8. These inflammatory mediators are central to the pathophysiology of obesity and its systemic effects
6 months
PROMIS-29
Tidsramme: 6 months
PROMIS is a questionnaire data bank developed and made available by the National Institutes of Health for research purposes. It is used to measure the core domains of physical functioning, fatigue, pain, depression, anxiety, and social role participation.
6 months
Perceived Stress Scale (PSS)
Tidsramme: 6 months
The PSS is brief, validated and widely used psychological instrument for assessing a participant's perception of stress. The PSS-4 consists of 4 questions to measure the degree to which situations in the participant's life are perceived as stressful including questions related to perceived unpredictability and lack of control.
6 months
WPAI
Tidsramme: 6 months
This 6 item, validated instrument measures work and general activity impairment due to health problems. It uses a seven day recall and has been adapted for use in populations with differing health problems.
6 months
PROMIS-GH
Tidsramme: 6 months
PROMIS is a questionnaire data bank developed and made available by the National Institutes of Health for research purposes. The PROMIS-GH consists of 10 items, representing multiple domains and can be scored into a Global Physical Health component and a Global Mental Health component
6 months
International Physical Activity Questionnaire (IPAQ)
Tidsramme: 6 months
The International Physical Activity Questionnaire (IPAQ) short form (4 generic items) versions for use by either telephone or self-administered methods are available. The purpose of the questionnaire is to provide a common instrument that can be used to obtain internationally comparable data on health related physical activity. The development of this international measure for physical activity commenced in Geneva in 1998 and was followed by extensive reliability and validity testing undertaken in 12 countries (14 sites) across 6 continents during 2000.
6 months
IL-6
Tidsramme: 6 months
Inflammatory mediators, including IL-6, are central to the pathophysiology of obesity and its systemic effects.
6 months
IL-8
Tidsramme: 6 months
Inflammatory mediators, inlcuding IL-8, are central to the pathophysiology of obesity and its systemic effects.
6 months
HS-CRP
Tidsramme: 6 months
Elevated HS-CRP predicts the development of type II diabetes and is a crucial factor in calculating the Reynolds Risk Score.
6 months
Lp-PLA2 (PLAC)
Tidsramme: 6 months
This is an enzyme produced by inflammatory cells that hydrolyzes oxidized phospholipids in HDL and catalyzes the degradation of PAF, platelet activating factor. Levels are positively correlated with increased risk of developing coronary artery disease and stroke.
6 months
PAI-1
Tidsramme: 6 months
This is the primary inhibitor of plasminogen activation. Elevated levels predispose to clot formation by inhibiting fibrinolytic activity.
6 months
Fibrinogen
Tidsramme: 6 months
Fibrinogen is also known as coagulation Factor I. Elevated levels are associated with cardiovascular disease. This is an acute-phase protein that is elevated in any form of inflammation.
6 months

Samarbeidspartnere og etterforskere

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

Sponsor

Allina Health System

Etterforskere

  • Hovedetterforsker: Gregory Plotnikoff, MD, Allina Health
  • Studieleder: Jeffery Dusek, PhD, Allina Health
  • Studieleder: Shaina Biron, Allina Health

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. mars 2012

Primær fullføring (Faktiske)

1. februar 2014

Studiet fullført (Faktiske)

1. mars 2014

Datoer for studieregistrering

Først innsendt

28. februar 2012

Først innsendt som oppfylte QC-kriteriene

6. mars 2012

Først lagt ut (Anslag)

7. mars 2012

Oppdateringer av studieposter

Sist oppdatering lagt ut (Anslag)

1. september 2016

Siste oppdatering sendt inn som oppfylte QC-kriteriene

30. august 2016

Sist bekreftet

1. august 2016

Mer informasjon

Begreper knyttet til denne studien

Nøkkelord

Ytterligere relevante MeSH-vilkår

Andre studie-ID-numre

  • SPA ID 3607

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