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Genetic Variants and Iron Absorption

21 luglio 2014 aggiornato da: Cornell University

Metabolic Adaptation to Plant-based Diets in Asian Populations

The two specific aims of this study are: 1) to assess the impact of a genetic variant on iron status; 2) to assess the impact of a genetic variant on non-heme absorption among Asian women. The investigators hypothesize that the genetic variant could enhance iron status and iron absorption in Asian women.

Panoramica dello studio

Stato

Completato

Condizioni

Assorbimento del ferro

Descrizione dettagliata

To determine the HFE genotype of female Asian study volunteers, we collected venous blood samples and extracted DNA from these blood samples. HFE genotype was determined as CC, CT, and TT and used to assess possible differences in iron status as a function of genotype. To measure the impact of genotype on non-heme Fe absorption, a sub-group of women with the CC (n=10) or TT (n=11) genotype were invited to return for an Fe absorption study. Each volunteer consumed stable 57Fe (as ferrous sulfate). Two weeks after ingesting this tracer, a blood sample was collected from each woman and the amount of non-heme (57Fe) iron incorporated into red blood cells was measured with magnetic sector thermal ionization mass spectrometry. Possible associations between iron status and iron absorption as a function of genotypes were explored. Data from this study will provide information that aims to improve human health by better understanding the iron requirements of individuals with different genetic background.

Tipo di studio

Osservativo

Iscrizione (Effettivo)

Contatti e Sedi

Questa sezione fornisce i recapiti di coloro che conducono lo studio e informazioni su dove viene condotto lo studio.

Luoghi di studio

Stati Uniti
- New York
  - Ithaca, New York, Stati Uniti, 14853
    - Human Metabolic Research Unit, Cornell University

Criteri di partecipazione

I ricercatori cercano persone che corrispondano a una certa descrizione, chiamata criteri di ammissibilità. Alcuni esempi di questi criteri sono le condizioni generali di salute di una persona o trattamenti precedenti.

Criteri di ammissibilità

Età idonea allo studio

Da 18 anni a 35 anni (Adulto)

Accetta volontari sani

Sì

Sessi ammissibili allo studio

Femmina

Metodo di campionamento

Campione non probabilistico

Popolazione di studio

Women were eligible for the study if they met the following criteria: 1) non-pregnant and between the ages of 18~35 y; 2) of East Asian descent with both maternal and paternal grandparents from East Asia, including China, Japan, South Korea, Vietnam, Thailand, Malaysia and Singapore; 3) not taking any vitamin or mineral supplements for at least 1 month before the study and during the 2-week study interval; 4) no pre-existing medical problems including malabsorption, blood disorders, ulcers, joint diseases or asthma that might impact inflammation or Fe status; 5) not taking any prescribed medications known to affect iron homeostasis.

Descrizione

Inclusion Criteria:

non-pregnant and between the ages of 18~35 y
East Asian descent with both maternal and paternal grandparents from East Asia, including China, Japan, South Korea, Vietnam, Thailand, Malaysia and Singapore

Exclusion Criteria:

taking or planing to take any vitamin or mineral supplements during the study period
pre-existing medical problems that might impact inflammation or Fe status, including malabsorption, blood disorders, ulcers, joint diseases and asthma
taking any prescribed medications known to affect iron homeostasis

Piano di studio

Questa sezione fornisce i dettagli del piano di studio, compreso il modo in cui lo studio è progettato e ciò che lo studio sta misurando.

Come è strutturato lo studio?

Dettagli di progettazione

Cosa sta misurando lo studio?

Misure di risultato primarie

Misura del risultato	Misura Descrizione	Lasso di tempo
Genotype at SNP rs9366637 Lasso di tempo: 2 weeks after the participant's visit to the laboratory	At the participant's visit to the laboratory, a 10 mL blood sample was collected. The blood sample was used for determining genotype.	2 weeks after the participant's visit to the laboratory
Hemoglobin Lasso di tempo: Up to 2 days after the participant's visit to the laboratory	At the participant's visit to the laboratory, a 10 mL blood sample was collected. The blood sample was used for determining the concentration of hemoglobin.	Up to 2 days after the participant's visit to the laboratory
Serum Ferritin Lasso di tempo: Up to 6 months after the participant's visit to the laboratory	At the participant's visit to the laboratory, a 10 mL blood sample was collected. The blood sample was used for determining the concentration of serum ferritin.	Up to 6 months after the participant's visit to the laboratory
Serum transferrin receptor Lasso di tempo: Up to 6 months after the participant's visit to the laboratory	At the participant's visit to the laboratory, a 10 mL blood sample was collected. The blood sample was used for determining the concentration of serum transferrin receptor.	Up to 6 months after the participant's visit to the laboratory
Non-heme Iron absorption in women with 2 HFE genotypes Lasso di tempo: one month for screening with genotype then 2 weeks for iron absorption study	Women donated a blood sample for genotyping. Women with particular HFE genotypes were invited to return for an absorption study. Two weeks after women consume the iron tracer, a blood sample was obtained to measure the amount of iron absorbed.	one month for screening with genotype then 2 weeks for iron absorption study

Misure di risultato secondarie

Misura del risultato	Misura Descrizione	Lasso di tempo
Folate Lasso di tempo: Up to 6 months after the participant's visit to the laboratory	At the participant's visit to the laboratory, a 10 mL blood sample was collected. The blood sample was used for determining the concentration of folate.	Up to 6 months after the participant's visit to the laboratory
Vitamin B-12 Lasso di tempo: Up to 6 months after the participant's visit to the laboratory	At the participant's visit to the laboratory, a 10 mL blood sample was collected. The blood sample was used for determining the concentration of vitamin B-12.	Up to 6 months after the participant's visit to the laboratory
C-reactive protein Lasso di tempo: Up to 6 months after the participant's visit to the laboratory	At the participant's visit to the laboratory, a 10 mL blood sample was collected. The blood sample was used for determining the concentration of C-reactive protein.	Up to 6 months after the participant's visit to the laboratory

Collaboratori e investigatori

Qui è dove troverai le persone e le organizzazioni coinvolte in questo studio.

Sponsor

Cornell University

Studiare le date dei record

Queste date tengono traccia dell'avanzamento della registrazione dello studio e dell'invio dei risultati di sintesi a ClinicalTrials.gov. I record degli studi e i risultati riportati vengono esaminati dalla National Library of Medicine (NLM) per assicurarsi che soddisfino specifici standard di controllo della qualità prima di essere pubblicati sul sito Web pubblico.

Studia le date principali

Inizio studio

1 giugno 2012

Completamento primario (Effettivo)

1 aprile 2013

Completamento dello studio (Effettivo)

1 maggio 2014

Date di iscrizione allo studio

Primo inviato

16 luglio 2014

Primo inviato che soddisfa i criteri di controllo qualità

21 luglio 2014

Primo Inserito (Stima)

23 luglio 2014

Aggiornamenti dei record di studio

Ultimo aggiornamento pubblicato (Stima)