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Genetic Variants and Iron Absorption

2014년 7월 21일 업데이트: 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.

연구 개요

상태

완전한

정황

철 흡수

상세 설명

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.

연구 유형

관찰

등록 (실제)

연락처 및 위치

이 섹션에서는 연구를 수행하는 사람들의 연락처 정보와 이 연구가 수행되는 장소에 대한 정보를 제공합니다.

연구 장소

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

참여기준

연구원은 적격성 기준이라는 특정 설명에 맞는 사람을 찾습니다. 이러한 기준의 몇 가지 예는 개인의 일반적인 건강 상태 또는 이전 치료입니다.

자격 기준

공부할 수 있는 나이

18년 (성인)

건강한 자원 봉사자를 받아들입니다

예

연구 대상 성별

여성

샘플링 방법

비확률 샘플

연구 인구

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.

설명

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

공부 계획

이 섹션에서는 연구 설계 방법과 연구가 측정하는 내용을 포함하여 연구 계획에 대한 세부 정보를 제공합니다.

연구는 어떻게 설계됩니까?

디자인 세부사항

연구는 무엇을 측정합니까?

주요 결과 측정

결과 측정	측정값 설명	기간
Genotype at SNP rs9366637 기간: 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 기간: 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 기간: 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 기간: 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 기간: 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

2차 결과 측정

결과 측정	측정값 설명	기간
Folate 기간: 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 기간: 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 기간: 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

공동 작업자 및 조사자

여기에서 이 연구와 관련된 사람과 조직을 찾을 수 있습니다.

스폰서

Cornell University

연구 기록 날짜

이 날짜는 ClinicalTrials.gov에 대한 연구 기록 및 요약 결과 제출의 진행 상황을 추적합니다. 연구 기록 및 보고된 결과는 공개 웹사이트에 게시되기 전에 특정 품질 관리 기준을 충족하는지 확인하기 위해 국립 의학 도서관(NLM)에서 검토합니다.

연구 주요 날짜

연구 시작

2012년 6월 1일

기본 완료 (실제)

2013년 4월 1일

연구 완료 (실제)

2014년 5월 1일

연구 등록 날짜

최초 제출

2014년 7월 16일

QC 기준을 충족하는 최초 제출

2014년 7월 21일

처음 게시됨 (추정)

2014년 7월 23일

연구 기록 업데이트

마지막 업데이트 게시됨 (추정)