Iron deficiency influences the course of malaria in Plasmodium berghei infected mice

Area of Science:

• Hematology
• Infectious Diseases
• Parasitology

Background:

• Iron deficiency is linked to accelerated erythrocyte death, indicated by phosphatidylserine exposure.
• The impact of iron deficiency on Plasmodium falciparum infection and erythrocyte survival remains incompletely understood.

Purpose of the Study:

• To investigate if iron deficiency compromises intraerythrocytic Plasmodium growth.
• To determine if iron deficiency enhances infected erythrocyte death, influencing malaria progression.

Main Methods:

• Assessed phosphatidylserine exposure in Plasmodium falciparum-infected human erythrocytes under iron-deficient conditions.
• Evaluated the effect of iron deficiency on in vitro intraerythrocytic Plasmodium growth and infection.
• Studied the clearance of iron-deficient erythrocytes and Plasmodium berghei-infected erythrocytes in mice.
• Monitored parasitemia and survival rates in iron-deficient and control mice infected with P. berghei.

Main Results:

• Phosphatidylserine exposure was significantly increased in iron-deficient, Plasmodium falciparum-infected erythrocytes.
• Iron deficiency impaired in vitro intraerythrocytic Plasmodium growth and infection.
• Iron-deficient erythrocytes showed accelerated clearance from circulation in mice, an effect amplified by P. berghei infection.
• Parasitemia decreased from 54% to 33% in iron-deficient mice, and survival increased from 0% to 20% over 30 days.

Conclusions:

• Iron deficiency favorably influences the course of malaria.
• This beneficial effect is partly attributed to accelerated suicidal death and clearance of infected erythrocytes.
• Iron deficiency may represent a factor modulating malaria severity.