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Fetal haemoglobin and malaria

G Pasvol, D J Weatherall, R J Wilson

    Lancet (London, England)
    |June 12, 1976
    PubMed
    Summary
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    Malaria parasites, Plasmodium falciparum, invade young red blood cells more easily. Hemoglobin F significantly slows parasite growth, offering protection against malaria in infants and explaining high gene frequencies of related hemoglobinopathies.

    Area of Science:

    • Malariology
    • Hematology
    • Infectious Diseases

    Background:

    • Malaria remains a significant global health challenge, particularly in regions with high endemicity.
    • Understanding host factors influencing Plasmodium falciparum infection is crucial for developing control strategies.
    • Fetal hemoglobin (HbF) is known to confer some protection against severe malaria.

    Purpose of the Study:

    • To investigate the differential distribution and growth of Plasmodium falciparum in erythrocytes containing adult hemoglobin (HbA) versus fetal hemoglobin (HbF).
    • To elucidate the role of HbF in modulating malaria parasite invasion and development.
    • To explore the implications of these findings for malaria resistance in infants and the prevalence of hemoglobinopathies.

    Main Methods:

    • In vitro culture systems using red blood cells with varying hemoglobin types (HbA and HbF).

    Related Experiment Videos

  • Comparative analysis of Plasmodium falciparum invasion rates in different erythrocyte populations.
  • Assessment of parasite growth and development within infected cells.

    • Main Results:

    • Plasmodium falciparum exhibited higher invasion rates in cord blood cells (rich in HbF) in vitro.
    • A significant paucity of parasites was observed in erythrocytes containing HbF in infants aged 3-6 months.
    • Parasite growth in vitro was significantly retarded in cells containing HbF, suggesting an inhibitory effect.

    Conclusions:

    • Plasmodium falciparum preferentially invades young, metabolically active erythrocytes, irrespective of hemoglobin type.
    • Hemoglobin F significantly retards Plasmodium falciparum growth, contributing to malaria resistance in early infancy.
    • The inhibitory effect of HbF on parasite growth provides a mechanism for malaria resistance and may influence the high gene frequencies of thalassemias and related hemoglobinopathies in malaria-endemic areas.