Denne side blev automatisk oversat, og nøjagtigheden af ​​oversættelsen er ikke garanteret. Der henvises til engelsk version for en kildetekst.

Vitamin D for the Treatment of Women With Polycystic Ovary Syndrome (PCOS)

20. november 2017 opdateret af: Nazia Raja-Khan, Milton S. Hershey Medical Center

Vitamin D Supplementation in Polycystic Ovary Syndrome: a Randomized Controlled Trial.

The purpose of this study is to determine if vitamin D will improve insulin resistance, inflammation, and overall well-being in women with PCOS.

Studieoversigt

Status

Afsluttet

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

As many cells throughout the body possess the vitamin D receptor, adequate vitamin D levels may be essential for multiple physiologic functions. In recent years, vitamin D insufficiency has been linked to insulin resistance, inflammation, poor psychological health, obesity, type 2 diabetes, and cardiovascular disease - these are also commonly found in women with Polycystic Ovary syndrome (PCOS). We believe that vitamin D insufficiency contributes to insulin resistance, inflammation, and psychological distress in women with PCOS. These adverse effects may ultimately increase the risk for serious long-term complications in PCOS, including type 2 diabetes and cardiovascular disease. The key objectives of this research study are to determine the effects of vitamin D supplementation on insulin resistance, inflammation, mood and overall well-being in women with PCOS.

The protocol has been modified by adding the following specific aim: To compare vascular function in healthy age and BMI similar matched women to PCOS women pre-treatment. Our hypothesis is that PCOS women will have greater attenuations in retinal vascular reactivity compared to healthy control women, demonstrating poorer endothelial function. We are currently recruiting healthy women who are age and BMI similar to the PCOS women and measure their retinal vascular reactivity for comparisons to the PCOS women's pre-treatment vascular reactivity. These healthy women will only have a baseline visit in which retinal vascular reactivity will be measured. They will not be enrolled in the placebo or Vitamin D randomization process as described above.

Undersøgelsestype

Interventionel

Tilmelding (Faktiske)

36

Fase

  • Fase 2
  • Fase 1

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiesteder

  • Forenede Stater
    • Pennsylvania
      • Hershey, Pennsylvania, Forenede Stater, 17033
        • Penn State College of Medicine, Penn State Milton S Hershey Medical Center

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

18 år til 45 år (Voksen)

Tager imod sunde frivillige

Ingen

Køn, der er berettiget til at studere

Kvinde

Beskrivelse

Inclusion Criteria:

  • Diagnosis of PCOS based on:

    • Eight or fewer menstrual periods per year or spontaneous intermenstrual periods of greater than or equal to 45 days, and
    • Elevated testosterone levels

Exclusion Criteria:

  • Current Pregnancy or Nursing
  • Elevated calcium
  • Kidney Stones or kidney disease
  • Current use of vitamin D (other than a multivitamin)
  • Use of metformin or other insulin sensitizing drugs in the last 3 months
  • Elevated prolactin or untreated thyroid disease
  • Diabetes, Liver disease, Heart disease, or other serious medical condition

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Behandling
  • Tildeling: Randomiseret
  • Interventionel model: Parallel tildeling
  • Maskning: Dobbelt

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Placebo komparator: Placebo
Medicin: Placebo
Placebo by mouth once daily for 12 weeks
Eksperimentel: D-vitamin
Kosttilskud: Vitamin D
Vitamin D 300 mcg by mouth once daily for 12 weeks

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Change From Baseline in Mean Quantitative Insulin Sensitivity Check Index (QUICKI)
Tidsramme: Baseline and 12 weeks
Quantitative insulin sensitivity check index (QUICKI) is a validated measure of insulin sensitivity based on fasting insulin and glucose. Quantitative insulin sensitivity check index (QUICKI) = 1/[log(I(0)) + log(G(0))]).
Baseline and 12 weeks

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Change From Baseline in Mean High Sensitive C-reactive Protein (hsCRP)
Tidsramme: Baseline and 12 weeks
High sensitive C-reactive protein (hsCRP) was assessed as a measure of inflammation.
Baseline and 12 weeks
Change From Baseline in Mean Systolic Blood Pressure
Tidsramme: Baseline and 12 weeks
Blood pressure was measured in the right arm in the sitting position after a 15-minute rest.
Baseline and 12 weeks
Change From Baseline in Mean Diastolic Blood Pressure
Tidsramme: Baseline and 12 weeks
Blood pressure was measured in the right arm in the sitting position after a 15-minute rest.
Baseline and 12 weeks
Change From Baseline in Mean Fasting Glucose
Tidsramme: Baseline and 12 weeks
Glucose was assessed after 12 hours of fasting.
Baseline and 12 weeks
Change From Baseline in Mean Fasting Insulin
Tidsramme: Baseline and 12 weeks
Insulin was assessed after 12 hours of fasting.
Baseline and 12 weeks
Change From Baseline in Mean 2-hour Glucose
Tidsramme: Baseline and 12 weeks
Participants underwent a 75-gram oral glucose tolerance test, in which blood samples for glucose and insulin were obtained at 0 and 2 hours and used to calculate the insulin sensitivity index (ISI 0,120).
Baseline and 12 weeks
Change From Baseline in Mean 2-hour Insulin
Tidsramme: Baseline and 12 weeks
Participants underwent a 75-gram oral glucose tolerance test, in which blood samples for glucose and insulin were obtained at 0 and 2 hours and used to calculate the insulin sensitivity index (ISI 0,120).
Baseline and 12 weeks
Change From Baseline in Mean Insulin Sensitivity Index (ISI 0,120)
Tidsramme: Baseline and 12 weeks
Participants underwent a 75-g oral glucose tolerance test, in which blood samples for glucose and insulin were obtained at 0 and 120 minutes and used to calculate the insulin sensitivity index (ISI0,120). The ISI 0,120 = the glucose uptake rate divided by the mean plasma glucose divided by the log(mean serum insulin).
Baseline and 12 weeks
Change From Baseline in Mean Homeostatic Model Assessment of Insulin Resistance (HOMA-IR)
Tidsramme: Baseline and 12 weeks
Homeostatic Model Assessment of Insulin Resistance (HOMA-IR) is a validated measure of insulin resistance based on fasting insulin and glucose. HOMA-IR is calculated as the product of fasting glucose and insulin divided by 22.5.
Baseline and 12 weeks
Change From Baseline in Mean Total Cholesterol
Tidsramme: Baseline and 12 weeks
Lipid profile was assessed after 12 hours of fasting.
Baseline and 12 weeks
Change From Baseline in Mean HDL Cholesterol
Tidsramme: Baseline and 12 weeks
Lipid profile was assessed after 12 hours of fasting.
Baseline and 12 weeks
Change From Baseline in Mean LDL Cholesterol
Tidsramme: Baseline and 12 weeks
Lipid profile was assessed after 12 hours of fasting.
Baseline and 12 weeks
Change From Baseline in Mean Triglycerides
Tidsramme: Baseline and 12 weeks
Lipid profile was assessed after 12 hours of fasting.
Baseline and 12 weeks
Change From Baseline in Mean Total Testosterone
Tidsramme: Baseline and 12 weeks
Total and free testosterone levels were assessed from blood samples to evaluate effects on hyperandrogenemia in PCOS.
Baseline and 12 weeks
Change From Baseline in Mean Free Testosterone
Tidsramme: Baseline and 12 weeks
Total and free testosterone levels were assessed from blood samples to evaluate effects on hyperandrogenemia in PCOS.
Baseline and 12 weeks

Andre resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Change From Baseline in Mean 25-hydroxyvitamin D
Tidsramme: Baseline and 12 weeks
Total 25-hydroxyvitamin D was assayed by the Immunodiagnostic Systems radioimmunoassay.
Baseline and 12 weeks
Change From Baseline in Mean Vitamin D Binding Protein
Tidsramme: Baseline and 12 weeks
Vitamin D binding protein levels were assessed as it has been linked with insulin resistance and type 2 diabetes.
Baseline and 12 weeks
Change From Baseline in Mean Intact Parathyroid Hormone (i-PTH)
Tidsramme: Baseline and 12 weeks
Intact parathyroid hormone levels were assessed as they have been linked with obesity and insulin resistance.
Baseline and 12 weeks

Samarbejdspartnere og efterforskere

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

Sponsor

Milton S. Hershey Medical Center

Efterforskere

  • Ledende efterforsker: Nazia Raja-Khan, M.D., Penn State College of Medicine, Penn State Milton S. Hershey Medical Center

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. maj 2009

Primær færdiggørelse (Faktiske)

1. februar 2014

Studieafslutning (Faktiske)

1. september 2014

Datoer for studieregistrering

Først indsendt

21. maj 2009

Først indsendt, der opfyldte QC-kriterier

21. maj 2009

Først opslået (Skøn)

22. maj 2009

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

19. december 2017

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

20. november 2017

Sidst verificeret

1. november 2017

Mere information

Begreber relateret til denne undersøgelse

Nøgleord

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • 29714

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 Polycystisk ovariesyndrom

Kliniske forsøg med Vitamin D

Søg i lignende forsøg

Sponsorer og samarbejdspartnere

Medicinske tilstande

Narkotikainterventioner

CROs by country

CROs in Luxembourg

Betingelser

Sjældne sygdomme

Narkotikainterventioner

Kosttilskud

Sponsor / samarbejdspartnere

Placeringer

Abonner