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- Ensaio Clínico NCT00907153
Vitamin D for the Treatment of Women With Polycystic Ovary Syndrome (PCOS)
Vitamin D Supplementation in Polycystic Ovary Syndrome: a Randomized Controlled Trial.
Visão geral do estudo
Status
Condições
Intervenção / Tratamento
Descrição detalhada
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.
Tipo de estudo
Inscrição (Real)
Estágio
- Fase 2
- Fase 1
Contactos e Locais
Locais de estudo
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Pennsylvania
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Hershey, Pennsylvania, Estados Unidos, 17033
- Penn State College of Medicine, Penn State Milton S Hershey Medical Center
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Critérios de participação
Critérios de elegibilidade
Idades elegíveis para estudo
Aceita Voluntários Saudáveis
Gêneros Elegíveis para o Estudo
Descrição
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
Plano de estudo
Como o estudo é projetado?
Detalhes do projeto
- Finalidade Principal: Tratamento
- Alocação: Randomizado
- Modelo Intervencional: Atribuição Paralela
- Mascaramento: Dobro
Armas e Intervenções
Grupo de Participantes / Braço |
Intervenção / Tratamento |
|---|---|
|
Comparador de Placebo: Placebo
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Placebo by mouth once daily for 12 weeks
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Experimental: Vitamina D
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Vitamin D 300 mcg by mouth once daily for 12 weeks
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O que o estudo está medindo?
Medidas de resultados primários
Medida de resultado |
Descrição da medida |
Prazo |
|---|---|---|
|
Change From Baseline in Mean Quantitative Insulin Sensitivity Check Index (QUICKI)
Prazo: 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
|
Medidas de resultados secundários
Medida de resultado |
Descrição da medida |
Prazo |
|---|---|---|
|
Change From Baseline in Mean High Sensitive C-reactive Protein (hsCRP)
Prazo: Baseline and 12 weeks
|
High sensitive C-reactive protein (hsCRP) was assessed as a measure of inflammation.
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Baseline and 12 weeks
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Change From Baseline in Mean Systolic Blood Pressure
Prazo: Baseline and 12 weeks
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Blood pressure was measured in the right arm in the sitting position after a 15-minute rest.
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Baseline and 12 weeks
|
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Change From Baseline in Mean Diastolic Blood Pressure
Prazo: 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
|
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Change From Baseline in Mean Fasting Glucose
Prazo: Baseline and 12 weeks
|
Glucose was assessed after 12 hours of fasting.
|
Baseline and 12 weeks
|
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Change From Baseline in Mean Fasting Insulin
Prazo: Baseline and 12 weeks
|
Insulin was assessed after 12 hours of fasting.
|
Baseline and 12 weeks
|
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Change From Baseline in Mean 2-hour Glucose
Prazo: 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
Prazo: 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
|
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Change From Baseline in Mean Insulin Sensitivity Index (ISI 0,120)
Prazo: 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).
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Baseline and 12 weeks
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Change From Baseline in Mean Homeostatic Model Assessment of Insulin Resistance (HOMA-IR)
Prazo: 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.
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Baseline and 12 weeks
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Change From Baseline in Mean Total Cholesterol
Prazo: Baseline and 12 weeks
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Lipid profile was assessed after 12 hours of fasting.
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Baseline and 12 weeks
|
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Change From Baseline in Mean HDL Cholesterol
Prazo: Baseline and 12 weeks
|
Lipid profile was assessed after 12 hours of fasting.
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Baseline and 12 weeks
|
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Change From Baseline in Mean LDL Cholesterol
Prazo: Baseline and 12 weeks
|
Lipid profile was assessed after 12 hours of fasting.
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Baseline and 12 weeks
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Change From Baseline in Mean Triglycerides
Prazo: Baseline and 12 weeks
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Lipid profile was assessed after 12 hours of fasting.
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Baseline and 12 weeks
|
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Change From Baseline in Mean Total Testosterone
Prazo: Baseline and 12 weeks
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Total and free testosterone levels were assessed from blood samples to evaluate effects on hyperandrogenemia in PCOS.
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Baseline and 12 weeks
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Change From Baseline in Mean Free Testosterone
Prazo: Baseline and 12 weeks
|
Total and free testosterone levels were assessed from blood samples to evaluate effects on hyperandrogenemia in PCOS.
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Baseline and 12 weeks
|
Outras medidas de resultado
Medida de resultado |
Descrição da medida |
Prazo |
|---|---|---|
|
Change From Baseline in Mean 25-hydroxyvitamin D
Prazo: Baseline and 12 weeks
|
Total 25-hydroxyvitamin D was assayed by the Immunodiagnostic Systems radioimmunoassay.
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Baseline and 12 weeks
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Change From Baseline in Mean Vitamin D Binding Protein
Prazo: Baseline and 12 weeks
|
Vitamin D binding protein levels were assessed as it has been linked with insulin resistance and type 2 diabetes.
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Baseline and 12 weeks
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Change From Baseline in Mean Intact Parathyroid Hormone (i-PTH)
Prazo: Baseline and 12 weeks
|
Intact parathyroid hormone levels were assessed as they have been linked with obesity and insulin resistance.
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Baseline and 12 weeks
|
Colaboradores e Investigadores
Patrocinador
Investigadores
- Investigador principal: Nazia Raja-Khan, M.D., Penn State College of Medicine, Penn State Milton S. Hershey Medical Center
Publicações e links úteis
Datas de registro do estudo
Datas Principais do Estudo
Início do estudo
Conclusão Primária (Real)
Conclusão do estudo (Real)
Datas de inscrição no estudo
Enviado pela primeira vez
Enviado pela primeira vez que atendeu aos critérios de CQ
Primeira postagem (Estimativa)
Atualizações de registro de estudo
Última Atualização Postada (Real)
Última atualização enviada que atendeu aos critérios de controle de qualidade
Última verificação
Mais Informações
Termos relacionados a este estudo
Termos MeSH relevantes adicionais
- Processos Patológicos
- Neoplasias
- Doenças do Sistema Endócrino
- Doença
- Cistos ovarianos
- Cistos
- Doenças ovarianas
- Doenças anexiais
- Distúrbios Gonadais
- Síndrome dos ovários policísticos
- Síndrome
- Efeitos Fisiológicos das Drogas
- Micronutrientes
- Vitaminas
- Agentes de Conservação da Densidade Óssea
- Vitamina D
Outros números de identificação do estudo
- 29714
Essas informações foram obtidas diretamente do site clinicaltrials.gov sem nenhuma alteração. Se você tiver alguma solicitação para alterar, remover ou atualizar os detalhes do seu estudo, entre em contato com register@clinicaltrials.gov. Assim que uma alteração for implementada em clinicaltrials.gov, ela também será atualizada automaticamente em nosso site .
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