Impact of Host Iron Status and Iron Supplement Use on Erythrocytic Stage of Plasmodium Falciparum
The purpose of this study is to perform laboratory based studies to determine if the growth and development of the malaria parasite is effected by iron status of its host (the person infected with the malaria parasite). Iron deficiency affects over 500 million people including many pregnant women and children from areas of the world that are plagued by malaria. Some population based studies have suggested that iron deficiency protects people from getting malaria and this has raised questions about the wisdom of public health policies that provide universal iron supplementation in countries where malaria is common. We will use red blood cells and sera from patients with iron deficiency anemia, hereditary hemochromatosis and normal individuals who are taking iron supplements to look at this question in a very systematic way. This study should provide information for or against a possible mechanism by which iron deficiency may affect the malaria parasite. The results will contribute to efforts to develop evidence-based public health policies on iron supplementation policies in malaria-endemic areas.
There are three different types of individuals involved in this study (1) people with iron deficiency anemia who will be taking iron supplementation (2) people without iron deficiency anemia who will be taking iron supplementation and (3) people with a condition called hereditary hemochromatosis who have an excess of iron in their bodies.
|Study Design:||Allocation: Non-Randomized
Intervention Model: Parallel Assignment
Masking: Open Label
Primary Purpose: Basic Science
|Official Title:||Impact of Host Iron Status and Iron Supplement Use on Growth and Viability of the Erythrocytic Stage of Plasmodium Falciparum|
|Study Start Date:||November 2009|
|Study Completion Date:||January 2015|
|Primary Completion Date:||January 2015 (Final data collection date for primary outcome measure)|
|No Intervention: Iron Deficiency Anemia|
|No Intervention: Hereditary Hemochromatosis|
|Active Comparator: Iron Supplements||
Dietary Supplement: Iron Supplement
Iron supplementation (325 mg of ferrous sulfate) once daily for the 2 month duration of the study.
Other Name: Ferrous sulfate
Purpose: This proposal is aimed at studying the effect of an individual's iron status and iron supplementation on the growth and viability of the malarial parasite Plasmodium falciparum. The overall goal is to provide evidence to support the development of evidence-based programs to improve global health policy on iron supplementation in areas of the world with high malaria transmission. Current WHO recommendations include routine supplementation of women and children. Recently however, the wisdom of this policy when applied to areas afflicted with high rates of malaria has come under scrutiny. This proposal will study the effects of red blood cells (RBCs) and sera from iron overloaded patients (with hereditary hemochromatosis), iron deficient patients, and iron replete individuals taking oral iron supplements. This proposal will attempt to identify the mechanism by which the human host's iron status and iron supplement use affects the growth and viability of the P. falciparum parasite in red blood cells.
Participants: Healthy adult volunteers, adults with iron deficiency anemia, and patients with hereditary hemochromatosis will be enrolled in this study. Fifteen individuals will be recruited under each of the above three settings. This study involves only subjects over 18 years of age and both males and females will be included.
Procedures (methods): Participation in the study involves undergoing a series of screening tests and donation of blood and either a single time point (for hemochromatosis patients) or a total of three pre-specified time points (for healthy volunteers and those with iron deficiency). The healthy individuals will be asked to take oral iron supplements once daily (325 mg ferrous sulfate) for the duration of this study. Patient's blood will be separated by centrifugation into RBCs and sera, both of which will be used for in vitro studies on the impact of iron status on the growth and viability of Plasmodium falciparum.
Please refer to this study by its ClinicalTrials.gov identifier: NCT01027663
|United States, North Carolina|
|University of North Carolina at Chapel Hill|
|Chapel Hill, North Carolina, United States, 27599|
|Principal Investigator:||Raj Kasthuri, MD||University of North Carolina, Chapel Hill|