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

20 novembre 2017 mis à jour par: 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.

Aperçu de l'étude

Statut

Complété

Les conditions

Intervention / Traitement

Description détaillée

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.

Type d'étude

Interventionnel

Inscription (Réel)

36

Phase

  • Phase 2
  • La phase 1

Contacts et emplacements

Cette section fournit les coordonnées de ceux qui mènent l'étude et des informations sur le lieu où cette étude est menée.

Lieux d'étude

  • États-Unis
    • Pennsylvania
      • Hershey, Pennsylvania, États-Unis, 17033
        • Penn State College of Medicine, Penn State Milton S Hershey Medical Center

Critères de participation

Les chercheurs recherchent des personnes qui correspondent à une certaine description, appelée critères d'éligibilité. Certains exemples de ces critères sont l'état de santé général d'une personne ou des traitements antérieurs.

Critère d'éligibilité

Âges éligibles pour étudier

18 ans à 45 ans (Adulte)

Accepte les volontaires sains

Non

Sexes éligibles pour l'étude

Femelle

La description

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

Plan d'étude

Cette section fournit des détails sur le plan d'étude, y compris la façon dont l'étude est conçue et ce que l'étude mesure.

Comment l'étude est-elle conçue ?

Détails de conception

  • Objectif principal: Traitement
  • Répartition: Randomisé
  • Modèle interventionnel: Affectation parallèle
  • Masquage: Double

Armes et Interventions

Groupe de participants / Bras
Intervention / Traitement
Comparateur placebo: Placebo
Médicament: Placebo
Placebo by mouth once daily for 12 weeks
Expérimental: Vitamine D
Complément alimentaire: Vitamin D
Vitamin D 300 mcg by mouth once daily for 12 weeks

Que mesure l'étude ?

Principaux critères de jugement

Mesure des résultats
Description de la mesure
Délai
Change From Baseline in Mean Quantitative Insulin Sensitivity Check Index (QUICKI)
Délai: 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

Mesures de résultats secondaires

Mesure des résultats
Description de la mesure
Délai
Change From Baseline in Mean High Sensitive C-reactive Protein (hsCRP)
Délai: 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
Délai: 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
Délai: 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
Délai: Baseline and 12 weeks
Glucose was assessed after 12 hours of fasting.
Baseline and 12 weeks
Change From Baseline in Mean Fasting Insulin
Délai: Baseline and 12 weeks
Insulin was assessed after 12 hours of fasting.
Baseline and 12 weeks
Change From Baseline in Mean 2-hour Glucose
Délai: 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
Délai: 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)
Délai: 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)
Délai: 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
Délai: Baseline and 12 weeks
Lipid profile was assessed after 12 hours of fasting.
Baseline and 12 weeks
Change From Baseline in Mean HDL Cholesterol
Délai: Baseline and 12 weeks
Lipid profile was assessed after 12 hours of fasting.
Baseline and 12 weeks
Change From Baseline in Mean LDL Cholesterol
Délai: Baseline and 12 weeks
Lipid profile was assessed after 12 hours of fasting.
Baseline and 12 weeks
Change From Baseline in Mean Triglycerides
Délai: Baseline and 12 weeks
Lipid profile was assessed after 12 hours of fasting.
Baseline and 12 weeks
Change From Baseline in Mean Total Testosterone
Délai: 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
Délai: 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

Autres mesures de résultats

Mesure des résultats
Description de la mesure
Délai
Change From Baseline in Mean 25-hydroxyvitamin D
Délai: 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
Délai: 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)
Délai: Baseline and 12 weeks
Intact parathyroid hormone levels were assessed as they have been linked with obesity and insulin resistance.
Baseline and 12 weeks

Collaborateurs et enquêteurs

C'est ici que vous trouverez les personnes et les organisations impliquées dans cette étude.

Parrainer

Milton S. Hershey Medical Center

Les enquêteurs

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

Publications et liens utiles

La personne responsable de la saisie des informations sur l'étude fournit volontairement ces publications. Il peut s'agir de tout ce qui concerne l'étude.

Publications générales

Dates d'enregistrement des études

Ces dates suivent la progression des dossiers d'étude et des soumissions de résultats sommaires à ClinicalTrials.gov. Les dossiers d'étude et les résultats rapportés sont examinés par la Bibliothèque nationale de médecine (NLM) pour s'assurer qu'ils répondent à des normes de contrôle de qualité spécifiques avant d'être publiés sur le site Web public.

Dates principales de l'étude

Début de l'étude

1 mai 2009

Achèvement primaire (Réel)

1 février 2014

Achèvement de l'étude (Réel)

1 septembre 2014

Dates d'inscription aux études

Première soumission

21 mai 2009

Première soumission répondant aux critères de contrôle qualité

21 mai 2009

Première publication (Estimation)

22 mai 2009

Mises à jour des dossiers d'étude

Dernière mise à jour publiée (Réel)

19 décembre 2017

Dernière mise à jour soumise répondant aux critères de contrôle qualité

20 novembre 2017

Dernière vérification

1 novembre 2017

Plus d'information

Termes liés à cette étude

Mots clés

Termes MeSH pertinents supplémentaires

Autres numéros d'identification d'étude

  • 29714

Ces informations ont été extraites directement du site Web clinicaltrials.gov sans aucune modification. Si vous avez des demandes de modification, de suppression ou de mise à jour des détails de votre étude, veuillez contacter register@clinicaltrials.gov. Dès qu'un changement est mis en œuvre sur clinicaltrials.gov, il sera également mis à jour automatiquement sur notre site Web .

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