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Metabolic Syndrome and Insulin Resistance at Allina (MISURA)

2016. augusztus 30. frissítette: 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.

A tanulmány áttekintése

Állapot

Befejezve

Körülmények

Beavatkozás / kezelés

Részletes leírás

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.

Tanulmány típusa

Beavatkozó

Beiratkozás (Tényleges)

84

Fázis

  • 2. fázis

Kapcsolatok és helyek

Ez a rész a vizsgálatot végzők elérhetőségeit, valamint a vizsgálat lefolytatásának helyére vonatkozó információkat tartalmazza.

Tanulmányi helyek

  • Egyesült Államok
    • Minnesota
      • Minneapolis, Minnesota, Egyesült Államok, 55407
        • Allina Health

Részvételi kritériumok

A kutatók olyan embereket keresnek, akik megfelelnek egy bizonyos leírásnak, az úgynevezett jogosultsági kritériumoknak. Néhány példa ezekre a kritériumokra a személy általános egészségi állapota vagy a korábbi kezelések.

Jogosultsági kritériumok

Tanulmányozható életkorok

18 év és régebbi (Felnőtt, Idősebb felnőtt)

Egészséges önkénteseket fogad

Igen

Tanulmányozható nemek

Összes

Leírás

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

Tanulási terv

Ez a rész a vizsgálati terv részleteit tartalmazza, beleértve a vizsgálat megtervezését és a vizsgálat mérését.

Hogyan készül a tanulmány?

Tervezési részletek

  • Elsődleges cél: Megelőzés
  • Kiosztás: Véletlenszerűsített
  • Beavatkozó modell: Párhuzamos hozzárendelés
  • Maszkolás: Négyszeres

Fegyverek és beavatkozások

Résztvevő csoport / kar
Beavatkozás / kezelés
Aktív összehasonlító: Regular Dose
Intervention: 600 IUs of cholecalciferol taken by mouth daily.
Étrend-kiegészítő: 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
Más nevek:
  • D-Drops
Kísérleti: High Dose D
Intervention: 6,000 IUs of cholecalciferol taken by mouth daily.
Étrend-kiegészítő: 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
Más nevek:
  • D-Drops

Mit mér a tanulmány?

Elsődleges eredményintézkedések

Eredménymérő
Intézkedés leírása
Időkeret
insulin resistance score by NMR lipid fractionation
Időkeret: 6 months
additional insulin resistance measure
6 months
Reynolds Risk Score
Időkeret: 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
Időkeret: 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

Másodlagos eredményintézkedések

Eredménymérő
Intézkedés leírása
Időkeret
vérnyomás
Időkeret: 6 hónap
6 hónap
súly
Időkeret: 6 hónap
6 hónap
25-OH-vitamin D
Időkeret: 6 months
25-OH-vitamin D is the best measure of vitamin D status.
6 months
fasting lipid profile
Időkeret: 6 months
6 months
adiposity markers
Időkeret: 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
Időkeret: 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
Időkeret: 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)
Időkeret: 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
Időkeret: 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
Időkeret: 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)
Időkeret: 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
Időkeret: 6 months
Inflammatory mediators, including IL-6, are central to the pathophysiology of obesity and its systemic effects.
6 months
IL-8
Időkeret: 6 months
Inflammatory mediators, inlcuding IL-8, are central to the pathophysiology of obesity and its systemic effects.
6 months
HS-CRP
Időkeret: 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)
Időkeret: 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
Időkeret: 6 months
This is the primary inhibitor of plasminogen activation. Elevated levels predispose to clot formation by inhibiting fibrinolytic activity.
6 months
Fibrinogen
Időkeret: 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

Együttműködők és nyomozók

Itt találhatja meg a tanulmányban érintett személyeket és szervezeteket.

Szponzor

Allina Health System

Nyomozók

  • Kutatásvezető: Gregory Plotnikoff, MD, Allina Health
  • Tanulmányi igazgató: Jeffery Dusek, PhD, Allina Health
  • Tanulmányi igazgató: Shaina Biron, Allina Health

Tanulmányi rekorddátumok

Ezek a dátumok nyomon követik a ClinicalTrials.gov webhelyre benyújtott vizsgálati rekordok és összefoglaló eredmények benyújtásának folyamatát. A vizsgálati feljegyzéseket és a jelentett eredményeket a Nemzeti Orvostudományi Könyvtár (NLM) felülvizsgálja, hogy megbizonyosodjon arról, hogy megfelelnek-e az adott minőség-ellenőrzési szabványoknak, mielőtt közzéteszik őket a nyilvános weboldalon.

Tanulmány főbb dátumok

Tanulmány kezdete

2012. március 1.

Elsődleges befejezés (Tényleges)

2014. február 1.

A tanulmány befejezése (Tényleges)

2014. március 1.

Tanulmányi regisztráció dátumai

Először benyújtva

2012. február 28.

Először nyújtották be, amely megfelel a minőségbiztosítási kritériumoknak

2012. március 6.

Első közzététel (Becslés)

2012. március 7.

Tanulmányi rekordok frissítései

Utolsó frissítés közzétéve (Becslés)

2016. szeptember 1.

Az utolsó frissítés elküldve, amely megfelel a minőségbiztosítási kritériumoknak

2016. augusztus 30.

Utolsó ellenőrzés

2016. augusztus 1.

Több információ

A tanulmányhoz kapcsolódó kifejezések

Kulcsszavak

További vonatkozó MeSH feltételek

Egyéb vizsgálati azonosító számok

  • SPA ID 3607

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