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A family affair: var genes, PfEMP1 binding, and malaria disease

Susan M Kraemer1, Joseph D Smith

  • 1Seattle Biomedical Research Institute, Seattle, WA 98109-5219, USA.

Current Opinion in Microbiology
|July 4, 2006
PubMed

Insights

Erythrocyte membrane protein 1 (PfEMP1) from Plasmodium falciparum mediates cytoadhesion and antigenic variation. Var gene classification suggests adhesion groups with distinct roles in malaria infection, potentially guiding new prevention strategies.

Area of Science:

  • Malariology
  • Parasitology
  • Genomics

Background:

  • Erythrocyte membrane protein 1 (PfEMP1), encoded by var genes in Plasmodium falciparum, facilitates infected erythrocyte adhesion and antigenic variation.
  • PfEMP1 plays a critical role in malaria pathogenesis by mediating cytoadhesion to the microvasculature.

Purpose of the Study:

  • To investigate the genomic classification of var genes in Plasmodium falciparum.
  • To explore the potential correlation between var gene organization and the diversification of PfEMP1 adhesion groups.
  • To understand how PfEMP1 expression and receptor binding influence malaria infection and disease.

Main Methods:

  • Genomic sequence analysis of Plasmodium falciparum.
  • Classification of var genes based on 5' flanking sequences, chromosomal locations, and gene orientations.
  • Binding and serological comparisons of PfEMP1 variants.

Main Results:

  • Plasmodium falciparum var genes can be classified into distinct groups based on genomic features.
  • Genomic organization may drive the diversification of var genes into separate adhesion groups.
  • These adhesion groups likely possess different roles in malaria infection and disease progression.

Conclusions:

  • Understanding the genomic organization of var genes is crucial for deciphering PfEMP1 function.
  • Detailed knowledge of PfEMP1 expression and receptor binding mechanisms can inform novel malaria prevention strategies.
  • Investigating the antigenic relatedness of disease variants may lead to improved control of malaria.

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