Cytoadhesion Mechanisms in Plasmodium falciparum Infections

Plasmodium falciparum–infected erythrocytes adhere to the microvascular endothelium through a process known as cytoadhesion, a key factor in parasite survival and severe disease. Adhesion is mediated primarily by the multicopy Plasmodium falciparum erythrocyte membrane protein 1 (PfEMP1) family, which binds various host receptors including CD36, endothelial protein C receptor (EPCR) and intercellular adhesion molecule 1 (ICAM-1). Antigenic variation of PfEMP1 is achieved by switching expression among the var gene repertoire, enabling immune evasion and chronic infection. Distinct domain cassettes within PfEMP1 determine receptor specificity and have been linked to clinical syndromes such as cerebral malaria and placental malaria. High‐resolution structural studies have revealed conserved binding pockets and molecular mimicry of host ligands, while transcriptomic and serological analyses continue to refine our understanding of switching dynamics and protective immune responses. Unravelling these mechanisms is critical for the development of anti‐adhesion therapies, adjunctive treatments to prevent severe pathology and PfEMP1‐based vaccine candidates.

Research from Nature Portfolio

Recent structural investigations have elucidated how a conserved hydrophobic pocket in PfEMP1 engages CD36, revealing that a single phenylalanine residue on the host receptor underpins the broad binding capacity of diverse PfEMP1 variants. This work demonstrated that PfEMP1 targets a physiologically essential site on CD36, thereby balancing receptor affinity with minimal disruption to host function. Such insights into the molecular basis of CD36 recognition have provided a template for designing small‐molecule inhibitors or immunogens aimed at blocking sequestration without perturbing normal vascular homeostasis.

Cytoadhesion Mechanisms in Plasmodium falciparum Infections publication trend

The graph below shows the total number of articles in cytoadhesion mechanisms in plasmodium falciparum infections across all publications each year (not limited to Nature Index journals).

Technical terms

PfEMP1: A highly polymorphic family of variant surface proteins on infected erythrocytes responsible for binding host receptors and mediating cytoadhesion.

Cytoadhesion: The process by which P. falciparum–infected red blood cells adhere to vascular endothelium, facilitating parasite sequestration and immune evasion.

var genes: The multigene family encoding PfEMP1 variants; switching among var genes drives antigenic variation.

DBL domain: Duffy Binding-Like domain within PfEMP1 that contributes to receptor recognition, often subdivided into DBLα, DBLβ, etc.

CIDR domain: Cysteine-rich Interdomain Region in PfEMP1, with subtype CIDRα1 mediating EPCR binding and other subtypes interacting with CD36.

EPCR: Endothelial Protein C Receptor, a host vascular receptor targeted by CIDRα1 domains, implicated in severe malaria pathogenesis.

ICAM-1: Intercellular Adhesion Molecule 1, an endothelial receptor engaged by DBLβ domains to facilitate vascular sequestration.

Antigenic variation: The strategy by which P. falciparum alternates surface antigen expression to evade host immunity.

References

1. The structural basis for CD36 binding by the malaria parasite. Nature Communications (2016).
2. A systems serology approach to identifying key antibody correlates of protection from cerebral malaria in Malawian children. BMC Medicine (2024).
3. Immune evasion runs in the family: two surface protein families of Plasmodium falciparum–infected erythrocytes. Current Opinion in Microbiology (2025).
4. A novel computational pipeline for var gene expression augments the discovery of changes in the Plasmodium falciparum transcriptome during transition from in vivo to short-term in vitro culture. eLife (2024).