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

20. november 2017 oppdatert av: 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.

Studieoversikt

Status

Fullført

Forhold

Intervensjon / Behandling

Detaljert 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.

Studietype

Intervensjonell

Registrering (Faktiske)

36

Fase

  • Fase 2
  • Fase 1

Kontakter og plasseringer

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

Studiesteder

  • Forente stater
    • Pennsylvania
      • Hershey, Pennsylvania, Forente stater, 17033
        • Penn State College of Medicine, Penn State Milton S Hershey Medical Center

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 til 45 år (Voksen)

Tar imot friske frivillige

Nei

Kjønn som er kvalifisert for studier

Hunn

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

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: Parallell tildeling
  • Masking: Dobbelt

Våpen og intervensjoner

Deltakergruppe / Arm
Intervensjon / Behandling
Placebo komparator: Placebo
Legemiddel: Placebo
Placebo by mouth once daily for 12 weeks
Eksperimentell: Vitamin d
Kosttilskudd: Vitamin D
Vitamin D 300 mcg by mouth once daily for 12 weeks

Hva måler studien?

Primære resultatmål

Resultatmål
Tiltaksbeskrivelse
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
Tiltaksbeskrivelse
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
Tiltaksbeskrivelse
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

Samarbeidspartnere og etterforskere

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

Sponsor

Milton S. Hershey Medical Center

Etterforskere

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

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

1. mai 2009

Primær fullføring (Faktiske)

1. februar 2014

Studiet fullført (Faktiske)

1. september 2014

Datoer for studieregistrering

Først innsendt

21. mai 2009

Først innsendt som oppfylte QC-kriteriene

21. mai 2009

Først lagt ut (Anslag)

22. mai 2009

Oppdateringer av studieposter

Sist oppdatering lagt ut (Faktiske)

19. desember 2017

Siste oppdatering sendt inn som oppfylte QC-kriteriene

20. november 2017

Sist bekreftet

1. november 2017

Mer informasjon

Begreper knyttet til denne studien

Nøkkelord

Ytterligere relevante MeSH-vilkår

Andre studie-ID-numre

  • 29714

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