Effect of Nutrition on Bone Metabolism as Assessed by 41Ca
The Effect of Nutritional Intervention on Bone Metabolism as Assessed by 41Ca and Modeling; Proof of Concept
Studieoversigt
Status
Status
Betingelser
Betingelser
Intervention / Behandling
Intervention / Behandling
Detaljeret beskrivelse
Undersøgelsestype
Undersøgelsestype
Tilmelding (Faktiske)
Tilmelding
Fase
Fase
- Ikke anvendelig
Deltagelseskriterier
Berettigelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
Tager imod sunde frivillige
Køn, der er berettiget til at studere
Beskrivelse
Inclusion Criteria:
Healthy as assessed by the
- health and lifestyle questionnaire,
- physical examination
- results of the pre-study laboratory tests
- Females aged 50-68 years at Day 01 of the study
- Relatively low calcium intake as assessed by dairy intake questionnaire
- Body Mass Index (BMI) < 30 kg/m2
- Postmenopausal as confirmed by Follicle stimulating hormone (FSH) and oestradiol (E2) blood levels (FSH > 40IU/L, E2 < 70 pg/mL)
- Normal Dutch eating habits
- Voluntary participation
- Having given written informed consent
- Willing to comply with the study procedures
- Appropriate veins for blood sampling/cannula insertion according to TNO
- Willing to accept use of all nameless data, including publication, and the confidential use and storage of all data for at least 15 years
- Willing to accept the disclosure of the financial benefit of participation in the study to the authorities concerned.
Exclusion Criteria:
- Participation in any clinical trial including blood sampling and/or administration of substances up to 90 days before Day 01 of this study
- Participation in any non-invasive clinical trial up to 30 days before Day 01 of this study, including no blood sampling and/or oral, intravenous, inhalatory administration of substances
- Having a history of medical or surgical events that may significantly affect the study outcome, including cardiovascular disease or hypertension and gastrointestinal disease
- Prescribed medication, including hormone replacement therapy (within 6 months before start of the study) and anticoagulant medication.
- Reported intolerance for dairy products
- Not willing to stop the use of Boerenkarnemelk and cheese of the following Dutch brands: Emmenthaler, Gruyere, Leer/Maasdammer
- Alcohol consumption > 21 units/week
- Not willing to stop use of supplements containing minerals or vitamins
- Reported unexplained weight loss or gain of > 2 kg in the month prior to the pre-study screening
- Reported slimming or medically prescribed diet
- Reported vegan, vegetarian or macrobiotic
- Recent blood donation (<1 month prior to the start of the study)
- Not willing to give up blood donation during the study.
- Personnel of TNO Quality of Life, their partner and their first and second degree relatives
- Not having a general practitioner
- Not willing to accept information-transfer concerning participation in the study, or information regarding her health, like laboratory results, findings at anamnesis or physical examination and eventual adverse events to and from her general practitioner.
Studieplan
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
- Primært formål: Grundvidenskab
- Tildeling: Randomiseret
- Interventionel model: Crossover opgave
- Maskning: Firedobbelt
Antal våben
Våben og indgreb
Deltagergruppe / ArmDeltagergruppe / Arm |
Intervention / BehandlingIntervention / Behandling |
|---|---|
|
Aktiv komparator: calcium supplement with vitamin K
Milk product supplying about 420 mg Ca and 7.5 μg vitamin D3 and 100 μg vitamin K.
Additional 200 mg calcium in the form of carbonate
|
A calcium product will be given either with or without vitamin K.
Each intervention will last for 5 weeks, each followed by a 5 week wash-out.
The first intervention will start about 4 months after inclusion and the single 41Ca bolus.
|
|
Placebo komparator: calcium supplement without vitamin K
Milk product supplying about 420 mg Ca and 7.5 μg vitamin D3. no vitamin K.
Additional 200 mg calcium in the form of carbonate
|
Hvad måler undersøgelsen?
Primære resultatmål
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
|
urinary 41calcium excretion
Tidsramme: on study day numbers: 36, 71, 106, 113, 120, 127, 134, 141, 148, 155, 162, 169, 176, 183, 190, 197, 204, 211, 218, 225, 232, 239, 246, 253, 260, 267, 274, 281, 288
|
Urine is collected for measurement of 41Ca.
The concentration change of 41Ca during the intervention period indicates the efficacy of the intervention.
|
on study day numbers: 36, 71, 106, 113, 120, 127, 134, 141, 148, 155, 162, 169, 176, 183, 190, 197, 204, 211, 218, 225, 232, 239, 246, 253, 260, 267, 274, 281, 288
|
Sekundære resultatmål
Sekundære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
|
commonly accepted biomarkers for bone metabolism
Tidsramme: on study day numbers: 148, 183, 218, 253, 288
|
Plasma osteocalcin and urinary deoxypyridinolin/creatinin ratio are measured as traditional markers for bone accretion and bone resorption respectively.
These are the most commonly used biomarkers for bone metabolism.
|
on study day numbers: 148, 183, 218, 253, 288
|
Samarbejdspartnere og efterforskere
Sponsor
Sponsor
Efterforskere
Efterforskere
- Ledende efterforsker: Gertruud C Bakker, PhD, TNO
Datoer for undersøgelser
Studer store datoer
Studiestart
Studiestart
Primær færdiggørelse (Faktiske)
Primær færdiggørelse
Studieafslutning (Faktiske)
Studieafslutning
Datoer for studieregistrering
Først indsendt
Først indsendt
Først indsendt, der opfyldte QC-kriterier
Først indsendt, der opfyldte QC-kriterier
Først opslået (Skøn)
Først opslået
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Skøn)
Sidste opdatering sendt
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidst verificeret
Sidst verificeret
Mere information
Begreber relateret til denne undersøgelse
Nøgleord
Yderligere relevante MeSH-vilkår
- Metaboliske sygdomme
- Muskuloskeletale sygdomme
- Knoglesygdomme
- Knoglesygdomme, metaboliske
- Osteoporose
- Lægemidlers fysiologiske virkninger
- Molekylære mekanismer for farmakologisk virkning
- Fibrinmodulerende midler
- Mikronæringsstoffer
- Vitaminer
- Calciumregulerende hormoner og midler
- Antifibrinolytiske midler
- Hæmostatika
- Koagulanter
- Vitamin K
- Kalk
Andre undersøgelses-id-numre
Andre undersøgelses-id-numre
- 8145
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