MedTrace Logo

The Optimization of Iron Bioavailability of Supplements Using Hepcidin Levels in Humans

NCT02050932 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 32

Last updated 2014-01-31

No results posted yet for this study

Summary

Background: Oral iron supplementation (OIS) is a widely-used strategy to treat iron deficiency anemia. However, absorption of OIS is often low and response is variable. To overcome this, large doses are given but this may reduce compliance due to gastric irritation. Thus, OIS doses should be low, while maximizing absorption. The prevailing serum hepcidin concentration (SHep) is the major determinant of iron absorption and erythrocyte iron utilization. Based on limited data in humans, SHep can be increased by a single OIS dose but the duration of the increase is uncertain: In a recent study conducted in our laboratory it has been found to last approx. 24 h. Also, there are few data on how the increase in SHep determines the absorption of further doses of oral iron. Is there a threshold SHep at which subsequent iron absorption is sharply reduced? Better understanding of this relationship would be valuable to design more effective and safer OIS regimens.

Objectives: 1) Determine whether two consecutive dosages of 60 mg Fe differently affect hepcidin response and iron bioavailability (Study 1) 2) Compare the bioavailability of iron supplement dosages given at different times of the day (Study 2).

Methods/Subjects: Healthy female subjects will be screened for low iron status. Anemic subjects will be excluded from the study. Thirty two subjects will be included with serum ferritin \<20 µg/L, C-reactive protein \<5 mg/L and Hemoglobin \>117 g/L. Subjects will be randomized in two groups and their Hepcidin (sHep) and iron status markers monitored at day 1 (baseline). Subjects will receive iron supplement dosages of 60 mg with stable iron isotopes 54Fe, 57Fe, 58Fe in form of 4 mg of FeSO4. Prior administration blood samples will be collected to monitor sHep and iron status markers.

Outcome: The combined use of stable iron isotopes and a sensitive SHep assay will allow for better understanding of the iron-hepcidin relationship and this may enable design of more effective OIS regimens.

Conditions

Interventions

DIETARY_SUPPLEMENT

60 mg Fe as FeSO4 with stable isotopic labels

Subjects will receive FeSo4 supplements labeled with stable isotopic labels (54Fe, 57Fe, 58Fe) and iron absorption will be measured for each administration

Sponsors & Collaborators

  • Swiss Federal Institute of Technology

    lead OTHER

Principal Investigators

  • Diego Moretti, PhD · ETH Zürich, Laboratory of Human Nutrition

Study Design

Allocation
NA
Purpose
PREVENTION
Masking
NONE
Model
SINGLE_GROUP

Eligibility

Min Age
18 Years
Max Age
45 Years
Sex
FEMALE
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2013-11-30
Primary Completion
2013-12-31
Completion
2013-12-31

Countries

  • Switzerland

Study Locations

More Related Trials

Entities

Diseases

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT02050932 on ClinicalTrials.gov