Iron Absorption and Transfer to the Fetus During Pregnancy in Normal Weight and Overweight/Obese Women and the Effects on Infants Iron Status (PIANO)
Maternal Iron Absorption and Utilization and Iron Transfer to the Fetus During Pregnancy in Normal Weight and Overweight/Obese Women and the Effects on Infant Iron Status
Studieoversigt
Status
Status
Betingelser
Betingelser
Intervention / Behandling
Intervention / Behandling
Detaljeret beskrivelse
Undersøgelsestype
Undersøgelsestype
Tilmelding (Faktiske)
Tilmelding
Fase
Fase
- Ikke anvendelig
Kontakter og lokationer
Studiesteder
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-
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Zurich, Schweiz, 8092
- Human Nutrition Laboratory ETH Zurich
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Deltagelseskriterier
Berettigelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
Tager imod sunde frivillige
Køn, der er berettiget til at studere
Beskrivelse
Inclusion Criteria:
- Pregnant women with either normal pre-pregnancy BMI (BMI 18.5 - 24.9kg/kg2) or with overweight or obesity (BMI > 27.5kg/m2) before pregnancy (assessed based on data reported by the women at their first visit at the hospital)
- 18 to 45 years old
- singleton pregnancy
- week of pregnancy 14±3
Exclusion Criteria:
- underlying malabsorption disease
- chronic illness, which influences iron absorption
- inflammatory status other than obesity
- medical problems known to affect iron homeostasis
- smoking during pregnancy
- no regular use of medication, which influences iron absorption
Studieplan
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
- Primært formål: Grundvidenskab
- Tildeling: Ikke-randomiseret
- Interventionel model: Parallel tildeling
- Maskning: Ingen (Åben etiket)
Antal våben
Våben og indgreb
Deltagergruppe / ArmDeltagergruppe / Arm |
Intervention / BehandlingIntervention / Behandling |
|---|---|
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Eksperimentel: Isotopically labeled test meal week of pregnancy 20
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test meal labeled with 12 mg 57Fe
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Eksperimentel: Isotopically labeled test meal week of pregnancy 30
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test meal labeled with 12 mg 58Fe
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Hvad måler undersøgelsen?
Primære resultatmål
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
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Fractional iron absorption
Tidsramme: week 20 of pregnancy
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The fractional iron absorption from the first test meal will be calculated based on the shift of the iron isotopic ratios in the collected blood samples 14 days after administration of the isotopically labeled meal.
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week 20 of pregnancy
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iron transfer from the mother to the fetus in cord blood/infant
Tidsramme: delivery
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To determine the amount of iron transferred from the mother to the fetus
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delivery
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Fractional iron absorption
Tidsramme: week 30 of pregnancy
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The fractional iron absorption from the second test meal will be calculated based on the shift of the iron isotopic ratios in the collected blood samples 14 days after administration of the isotopically labeled meal.
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week 30 of pregnancy
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infants iron status
Tidsramme: over the first six months of life
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infants iron status
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over the first six months of life
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Sekundære resultatmål
Sekundære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
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Change in plasma ferritin
Tidsramme: weeks of pregnancy 12, 18, 20, 28, 30, 36; 3 and 6 months after delivery
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Change in plasma ferritin
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weeks of pregnancy 12, 18, 20, 28, 30, 36; 3 and 6 months after delivery
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Change in Hepcidin
Tidsramme: weeks of pregnancy 12, 18, 20, 28, 30, 36; 3 and 6 months after delivery
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Change in Hepcidin
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weeks of pregnancy 12, 18, 20, 28, 30, 36; 3 and 6 months after delivery
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Change in transferrin receptor
Tidsramme: weeks of pregnancy 12, 18, 20, 28, 30, 36; 3 and 6 months after delivery
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Change in transferrin receptor
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weeks of pregnancy 12, 18, 20, 28, 30, 36; 3 and 6 months after delivery
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Change in hemoglobin
Tidsramme: weeks of pregnancy 12, 18, 20, 28, 30, 36; 3 and 6 months after delivery
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Change in hemoglobin
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weeks of pregnancy 12, 18, 20, 28, 30, 36; 3 and 6 months after delivery
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Change in c-reactive protein
Tidsramme: weeks of pregnancy 12, 18, 20, 28, 30, 36; 3 and 6 months after delivery
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Change in c-reactive protein
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weeks of pregnancy 12, 18, 20, 28, 30, 36; 3 and 6 months after delivery
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Change in interleukin-6
Tidsramme: weeks of pregnancy 12, 18, 20, 28, 30, 36; 3 and 6 months after delivery
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Change in interleukin-6
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weeks of pregnancy 12, 18, 20, 28, 30, 36; 3 and 6 months after delivery
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Chage in alpha-1-acid glycoprotein
Tidsramme: weeks of pregnancy 12, 18, 20, 28, 30, 36; 3 and 6 months after delivery
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Chage in alpha-1-acid glycoprotein
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weeks of pregnancy 12, 18, 20, 28, 30, 36; 3 and 6 months after delivery
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Change in retinol binding protein
Tidsramme: weeks of pregnancy 12, 18, 20, 28, 30, 36; 3 and 6 months after delivery
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Change in retinol binding protein
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weeks of pregnancy 12, 18, 20, 28, 30, 36; 3 and 6 months after delivery
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Change in riboflavin
Tidsramme: weeks of pregnancy 12, 18, 20, 28, 30, 36; 3 and 6 months after delivery
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Change in riboflavin
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weeks of pregnancy 12, 18, 20, 28, 30, 36; 3 and 6 months after delivery
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Assessment of children's iron needs within their first 2 years of life using an isotope dilution technique
Tidsramme: Follow-up blood samples at 3, 6, 12, 18, 24 months after birth
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Assessment of children's iron needs within their first 2 years of life
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Follow-up blood samples at 3, 6, 12, 18, 24 months after birth
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Assessment of recovery of mother's iron Status after pregnancy using an isotope dilution technique
Tidsramme: Follow-up blood samples at 3, 6, 12, 18, 24 months after delivery
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Assessment of recovery of mother's iron Status after pregnancy
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Follow-up blood samples at 3, 6, 12, 18, 24 months after delivery
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infants iron status
Tidsramme: over the first 24 months of life
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infants iron status
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over the first 24 months of life
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Samarbejdspartnere og efterforskere
Sponsor
Sponsor
Publikationer og nyttige links
Datoer for undersøgelser
Studer store datoer
Studiestart (Faktiske)
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 (Faktiske)
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
Yderligere relevante MeSH-vilkår
Andre undersøgelses-id-numre
Andre undersøgelses-id-numre
- PIANO
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