Skip to content

Vitamin D and pharmakogenetics in glucose metabolism

A randomized, double-blind, placebo controlled trial to evaluate the effects of vitamin D supplementation on metabolic and fertility parameters in PCOS women

Status
Active, not recruiting
Phases
Phase 3
Study type
Interventional
Source
EU CTR
Registry ID
EUCTR2011-000994-30-AT
Enrollment
300
Registered
2013-01-24
Start date
2013-02-19
Completion date
Unknown
Last updated
2025-03-24

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Polycystic Ovary Syndrome

Interventions

Trade Name: Oleovit D3-Tropfen Pharmaceutical Form: Oral drops INN or Proposed INN: Colecalciferol Other descriptive name: CHOLECALCIFEROL CONCENTRATE (WATER-DISPERSIBLE FORM) Concentration unit: IU/m

Sponsors

Medizinische Universität Graz
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: PCOS women: 1) Premenopausal women =18 years 2) Polycystic ovary syndrome: 2 out of the following criterias are required: a) Oligo- or anovulation b) Biochemical and/or clinical hyperandrogenism c) Polycystic ovaries 3) 25(OH)D =65 years) no F.1.3.1 Number of subjects for this age range

Exclusion criteria

Exclusion criteria: PCOS women: Hypercalcemia Withdrawn informed consent Hormonal contraception in the last 3 months before entering the study Insulin sensitizing agents in the last 6 months before entering the study Lipid lowering agents and drugs affecting androgens and insulin sensitivity in the last 3 months before entering the study Vitamin D supplementation in the last 3 months before entering the study Hyperandrogenism caused by other diseases than polycystic ovary syndrome (Cushing disease, adrenogenital syndrome) Healthy women: diagnosed PCOS or any of the following criteria: Oligo- or anovulation, Biochemical and/or clinical hyperandrogenism, Polycystic ovaries Hypercalcemia Withdrawn informed consent Hormonal contraception in the last 3 months before entering the study Insulin sensitizing agents in the last 6 months before entering the study Lipid lowering agents and drugs affecting androgens and insulin sensitivity in the last 3 months before entering the study Vitamin D supplementation in the last 3 months before entering the study

Design outcomes

Primary

MeasureTime frame
Main Objective: To investigate the effect of vitamin D supplementation when compared to placebo on AUCgluc in women with polycystic ovary syndrome.;Secondary Objective: To investigate the effect of vitamin D supplementation when compared to placebo on insulin resistance, insulin sensitivity, hyperandrogenemia and fertility in women with polycystic ovary syndrome. To investigate pharmacogenetic effects of vitamin D-related genetic variants. In addition, gene expression analyses of relevant candidate genes in association with pathways of vitamin D, androgens and metabolism will be performed at each visit in order to analyze functional changes during vitamin D treatment;Primary end point(s): 25-OH-vitamin D, 1,25-OH-vitamin D, PTH oral glucose tolerance test (glucose, insulin, C-peptide), AUCgluc, AUCins HOMA-index, QUICKI, MATSUDA, Proinsulin HbA1c, serum lipids ;Timepoint(s) of evaluation of this end point: 12 weeks, 24 weeks

Secondary

MeasureTime frame
Secondary end point(s): menstrual frequency endocrine parameters (testosterone, free testosterone, SHBG, prolactin, androstendione, DHEAS, 17-OHprogesterone) Lipometry questionnaires, hirsutism-score (Ferriman-Gallway-score) Transvaginal ultrasound Genotypes-pharmacogenetic effects Gene expression analyses (candidate genes: androgen receptor (AR), estrogen receptor (ER), aromatase (Cyp19), FOXL2 (Forkhead Box Protein L2), STAR (Steroidogenic acute regulatory protein), Cytochrom-P11, Cytochrom-P17, receptors of FSH and LH, SHBG, anti- und proinflammatory genes (Interleukines, Interferon, FOXP3 (forkhead box P3),…), genes related to glucose metabolism (IGF-1 (Insulin-like growth factor 1), IGF-1R (Insulin-like growth factor 1 Rezeptor), IGF-BP (Insulin-like growth factor binding proteins), INSL (Insulin-like peptides), insulin receptor (IR),…) and Vitamin D metabolism (Vitamin-D-Rezeptor (VDR), Cyp2R1, Cyp27A1, Cyp24A1, Cyp27B, as well as genes of TGF-beta superfamily (inhibin, activin und its receptors, follistatin, Transforming Growth Factors und its receptors, BMPs, AMH, Growth and Differentiation Factor 9 (GDF9)).;Timepoint(s) of evaluation of this end point: 12 weeks, 24 weeks

Countries

Austria

Contacts

Public ContactInformation für Klinische Studien

Medizinische Universität Graz

elisabeth.lerchbaum@medunigraz.at004331638581144

Outcome results

None listed

Source: EU CTR (via WHO ICTRP) · Data processed: Feb 4, 2026